CN102750065B

CN102750065B - Electro-magnetic induction matrix, contact positioning device and interactive electronic whiteboard

Info

Publication number: CN102750065B
Application number: CN201210158374.7A
Authority: CN
Inventors: 万秋柏; 张腊生
Original assignee: CHIBI JULONG SCIENTIFIC EDUCATIONAL HIGH TECHNOLOGY Co Ltd
Current assignee: CHIBI JULONG SCIENTIFIC EDUCATIONAL HIGH TECHNOLOGY Co Ltd
Priority date: 2012-05-21
Filing date: 2012-05-21
Publication date: 2015-07-22
Anticipated expiration: 2032-05-21
Also published as: CN102750065A

Abstract

The invention is suitable for the field of positioning of an electro-magnetic induction signal, and provides an electro-magnetic induction matrix netting method, a contact positioning method, an electro-magnetic induction matrix, a contact positioning device and an interactive electronic whiteboard. The netting method comprises the following steps of: respectively numbering a plurality of conducting wires along with the X axial direction and the Y axial direction; respectively setting a plurality of netting labels along with the X axial direction and the Y axial direction, and sequentially numbering the plurality of netting labels; and continuously winding the plurality of conducting wires along with the X axial direction and the Y axial direction according to the numbers of the plurality of netting labels along with the X axial direction and the Y axial direction, so that the netting can be completed. According to the invention, after the conducting wires and the netting labels are numbered, the conducting wires which correspond to the numbers are sequentially and continuously wound according to the number of the netting labels, so that the netting can be realized, i.e. one conducting wire can be wound into the plurality of windings through the plurality of netting labels, and the number of connecting points can be greatly reduced, therefore, the amount of interface devices can be reduced, an interface circuit can be simplified, the area of an interface unit can be reduced, and the reliability and the production work efficiency can be improved.

Description

A kind of electromagnetic induction matrix, contact locating device and interactive electric whiteboard

Technical field

The invention belongs to electromagnetic induction signal positioning field, particularly relate to a kind of netting method of electromagnetic induction matrix, contact positioning method, electromagnetic induction matrix, contact locating device and interactive electric whiteboard.

Background technology

Induction electronic whiteboard is the blank based on electromagnetic induction principle work.Wherein electronic pen is as electromagnetic wave launcher, and the receiving coil on sensor in the X-direction of electromagnetic induction matrix and Y direction, as receiving trap, receives transmitting of electronic pen.When electronic pen operation or the electromagnetic wave launched when writing, by the X-axis coil on sensor and Y-axis coil-induced and produce induced signal, by determining the coordinate position of electronic pen to the process of induced signal amplitude.

At present, the netting mode of traditional electrical magnetic induction matrix for each map be a winding, separate between winding, for the electronic whiteboard of one piece of 85 inch, need in the horizontal direction to arrange about 140 inductive coils, arrangement about 100 inductive coils are needed at vertical direction, many logic control devices are just needed during such signal scanning, the corresponding coil of each logical channel, each coil has two out splice going splices, and all joints all will be received on the logical device terminal block of X-direction, Y direction.This netting mode the end of a thread is many, solder joint is many, logical device is many and the circuit board of logical device all can be welded to load plate in-core on sensor, so, this netting mode make easily make mistakes, poor reliability, complex process, cost are high, be not easy to maintenance.

Summary of the invention

The object of the embodiment of the present invention is a kind of netting method providing electromagnetic induction matrix, is intended to solve the problem that existing netting method the end of a thread is many, solder joint is many, poor reliability, cost are high.

The embodiment of the present invention realizes like this, a kind of netting method of electromagnetic induction matrix, the X-direction of described electromagnetic induction matrix has N1 root wire, the Y direction of described electromagnetic induction matrix has N2 root wire, described N1, N2 are the integer being greater than 2, and described netting method comprises the steps:

Respectively wire described in the N2 root of wire, Y direction described in the N1 root of X-direction is numbered;

M1 netting label is set in X-direction, and successively M1 described netting label of X-direction is numbered, M2 netting label is set in Y direction, and successively M2 described netting label of Y direction is numbered;

Wire described in the N1 root of X-direction is carried out continuous coiling successively according to the numbering of the M1 of X-direction described netting label and forms multiple winding, wire described in the N2 root of Y direction is carried out continuous coiling successively according to the numbering of the M2 of Y direction described netting label and forms multiple winding, wherein each described netting label overlaps and be fixed with many described wires, and described M1 is the integer being greater than described N1, described M2 is the integer being greater than described N2;

Using one end of the described wire of multiple for each continuous coiling winding as input end, the other end is as earth terminal, and multiple described earth terminal is formed altogether to be held, altogether to complete netting;

Described M1 netting label is set in X-direction, and successively M1 described netting label of X-direction is numbered, M2 netting label is set in Y direction, and successively the step that the individual described netting label of the M2 of Y direction is numbered is specially:

The X-direction of described electromagnetic induction matrix comprises laterally the first name region and laterally the second name region, Y direction comprises longitudinally the first name region and longitudinally the second name region, described transverse direction first names region to comprise (N1-2) individual netting label, described longitudinal direction first names region to comprise (N2-2) individual netting label, described transverse direction second names region to comprise (M1-N1+2) individual netting label, described longitudinal direction second names region to comprise (M2-N2+2) individual netting label, described (M1-N1+2), (M2-N2+2) integral multiple being 3 more than 1 integer, the first interval is preset as between netting label described in each,

Described transverse direction first is named (N1-2) individual netting label number consecutively in region is (N1-2), (N1-1) ..., 1, described longitudinal direction first is named (N2-2) individual netting label number consecutively in region is (N2-2), (N2-1) ..., 1;

Described transverse direction second is named (M1-N1+1) the individual netting label in region except last netting label respectively, described longitudinal direction second names (M2-N2+1) in region individual netting label to be divided into several groups, each group comprises three described netting labels;

Respectively the netting label of each group of X-direction is numbered according to a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of described X-direction does not all repeat, respectively the netting label of each group of Y direction is numbered according to a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of described Y direction does not all repeat, described a is the integer divided by more than 30, described b is the integer divided by more than 31, and described c is the integer divided by more than 32;

Described transverse direction second named region and longitudinally second name last netting label in region to be all numbered 0.

Another object of the embodiment of the present invention is to provide a kind of contact positioning method to the electromagnetic induction matrix that above-mentioned netting method is formed, and described contact positioning method comprises the steps:

The induced voltage of wire described in the N2 root of wire and Y direction described in the N1 root obtaining X-direction respectively by closed-loop path;

Determine the lead location corresponding to the strongest induced voltage;

Whether the induced voltage of the adjacent wires of the wire that the strongest induced voltage is corresponding described in judgement is in predetermined threshold value;

The information of the lead location if so, then corresponding to the strongest described induced voltage generates contact coordinate;

If not, then the strongest induced voltage described in time strong induced voltage being replaced, and return the described step determining the lead location corresponding to the strongest induced voltage of execution.

Another object of the embodiment of the present invention is to provide a kind of electromagnetic induction matrix, and described electromagnetic induction matrix comprises:

The X-direction of described electromagnetic induction matrix has N1 root wire, and the Y direction of described electromagnetic induction matrix has N2 root wire, and described N1, N2 are the integer being greater than 2; Described in the N2 root of wire, described Y direction described in the N1 root of described X-direction, wire is provided with numbering;

Described X-direction has that M1 establishes numbered netting label, described Y direction has M2 and establishes numbered netting label, and described M1 is the integer being greater than described N1, and described M2 is the integer being greater than described N2;

Described electromagnetic induction matrix comprises multiple winding, the described winding of X-direction is formed by the numbering continuous coiling of wire described in the N1 root of X-direction according to the M1 of X-direction described netting label, multiple windings of Y direction are formed by the numbering continuous coiling of wire described in the N2 root of Y direction according to the M2 of Y direction described netting label, wherein each described netting label overlaps and be fixed with many described wires, and one end of the described wire of the multiple winding of each continuous coiling is as input end, the other end is as earth terminal, multiple described earth terminal is formed altogether to be held altogether,

The X-direction of described electromagnetic induction matrix comprises laterally the first name region and laterally the second name region, the Y direction of described electromagnetic induction matrix comprises longitudinally the first name region and longitudinally the second name region, described transverse direction first names region to comprise (N1-2) individual netting label, described longitudinal direction first names region to comprise (N2-2) individual netting label, described transverse direction second names region to comprise (M1-N1+2) individual netting label, described longitudinal direction second names region to comprise (M2-N2+2) individual netting label, described (M1-N1+2), (M2-N2+2) integral multiple being 3 more than 1 integer, the first interval is preset as between netting label described in each,

Described transverse direction first name the numbering of (N1-2) in region individual netting label be followed successively by (N1-2), (N1-1) ..., 1, described longitudinal direction first name the numbering of (N2-2) in region individual netting label be followed successively by (N2-2), (N2-1) ..., 1;

Described transverse direction second names (M1-N1+1) the individual netting label in region except last netting label, described longitudinal direction second names (M2-N2+1) in region except last netting label individual netting label to comprise several groups respectively, and each group comprises three described netting labels;

The netting label of each group of described X-direction, Y direction is all numbered with a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of described X-direction, Y direction does not all repeat, described a is the integer divided by more than 30, described b is the integer divided by more than 31, and described c is the integer divided by more than 32;

What described transverse direction second named region and described longitudinal direction second to name last netting label in region is numbered 0.

Another object of the embodiment of the present invention is to provide a kind of interactive electric whiteboard comprising above-mentioned electromagnetic induction matrix.

Another object of the embodiment of the present invention is to provide the wire of a kind of and above-mentioned electromagnetic induction matrix the corresponding contact locating device connected, and described device comprises:

Induced voltage acquiring unit, for obtaining the induced voltage of the N1 root wire of X-direction and the N2 root wire of Y direction respectively by closed-loop path;

Positioning unit, the input end of described positioning unit is connected with the output terminal of described induced voltage acquiring unit, for determining the lead location corresponding to the strongest induced voltage;

Judging unit, the input end of described judging unit is connected with the output terminal of described positioning unit, for judging that the induced voltage of the adjacent wires of the wire that the strongest induced voltage is corresponding is whether in predetermined threshold value;

Contact coordinate generation unit, the input end of described contact coordinate generation unit is connected with the output terminal of described judging unit, for when the induced voltage of the adjacent wires when wire corresponding to the strongest induced voltage is in predetermined threshold value, the information of the lead location corresponding to the strongest induced voltage generates contact coordinate;

Replacement unit, the input end of described replacement unit is connected with the output terminal of described judging unit, the output terminal of described replacement unit is connected with the control end of described positioning unit, for when the induced voltage of the adjacent wires when wire corresponding to the strongest induced voltage is not in predetermined threshold value, time strong induced voltage is replaced the strongest induced voltage, and controls described judging unit and rejudge.

Another object of the embodiment of the present invention is to provide a kind of interactive electric whiteboard comprising above-mentioned contact locating device.

Further, the contact locating device in described electronic whiteboard is placed on outside the plate core of described electronic whiteboard.

Further, the interface unit in described electronic whiteboard is connected with described contact locating device by winding displacement.

The embodiment of the present invention is first numbered wire and netting label according to the rule preset, again according to the numbering of netting label by the wire of reference numeral successively continuous coiling, realize netting, namely a wire can be multiple winding continuously across the coiling of multiple netting label, every root wire is connected with outside by means of only a link, greatly reduce tie point number, avoid because connecting the fault of slipping up and causing, significantly reduce the quantity of number of welds and interface device, reduce the area of interface unit, improve work efficiency, reduce costs, and improve reliability.And based on this netting method, by carrying out the method for auxiliary positioning to the both sides wire of maximum induced signal position, successively the first strength signal is screened in conjunction with threshold value, avoid the signal drift phenomenon caused by time writer pitch angle too small (lower than 30 degree of angles), realize accurately location, can write with arbitrarily angled.And the port of multiple conducting wires and ground wire is welded on interface unit, be packaged in the plate core segment of interactive electric whiteboard together, be connected with the contact locating device being placed on plate core by winding displacement, make the plate core segment inside of interactive electric whiteboard not containing any circuit and electron device, contact locating device containing electron device is placed on plate core, improve the reliability of blank, and be convenient to dismounting and change and maintenance.

Accompanying drawing explanation

The realization flow figure of the netting method of the electromagnetic induction matrix that Fig. 1 provides for first embodiment of the invention;

The realization flow figure of the netting method of the electromagnetic induction matrix that Fig. 2 provides for second embodiment of the invention;

The realization flow figure of the netting method of the electromagnetic induction matrix that Fig. 3 provides for third embodiment of the invention;

The realization flow figure of the contact positioning method that the netting method of the electromagnetic induction matrix that Fig. 4 provides for fourth embodiment of the invention is corresponding;

The realization flow figure of the contact positioning method that the netting method of the electromagnetic induction matrix that Fig. 5 provides for fifth embodiment of the invention is corresponding;

The structural drawing of the electromagnetic induction matrix that Fig. 6 provides for one embodiment of the invention;

Fig. 7 for one embodiment of the invention provide for the structural drawing of the electromagnetic induction matrix of 21 wires;

The structural drawing of the contact locating device that the electromagnetic induction matrix that Fig. 8 provides for one embodiment of the invention is corresponding;

The structure of the interactive electric whiteboard that Fig. 9 provides for one embodiment of the invention;

The Facad structure figure of pcb board in the interactive electric whiteboard that Figure 10 (a) provides for one embodiment of the invention;

The inverse layer structure figure of pcb board in the interactive electric whiteboard that Figure 10 (b) provides for one embodiment of the invention.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

The embodiment of the present invention takes continuous coiling formula netting mode, and every root wire only has two interfaces to be connected with interface circuit, greatly reduces pad number, improves production work efficiency and product reliability.

Fig. 1 shows the realization flow of the netting method of the electromagnetic induction matrix that first embodiment of the invention provides, and details are as follows:

The X-direction of this electromagnetic induction matrix has N1 root wire, and the Y direction of this electromagnetic induction matrix has N2 root wire, and N1, N2 are the integer being greater than 2.Described netting method comprises the steps:

In step S101, respectively the N1 root wire of X-direction, the N2 root wire of Y direction are numbered;

In step s 102, in X-direction, M1 netting label is set, and successively M1 described netting label of X-direction is numbered, in Y direction, M2 netting label is set, and successively M2 described netting label of Y direction is numbered, M1 is the integer being greater than N1, and M2 is the integer being greater than N2;

In step s 103, the N1 root wire of X-direction is carried out continuous coiling successively according to the numbering of the M1 of X-direction netting label 11 and forms multiple winding, the N2 root wire of Y direction is carried out continuous coiling successively according to the numbering of the M2 of Y direction netting label 11 and forms multiple winding, see Fig. 6;

In step S104, using one end of the wire of multiple for each continuous coiling winding as input end, the other end is as earth terminal, and multiple earth terminal forms one altogether and holds altogether, to complete netting.

In embodiments of the present invention, first according to the rule preset, wire and netting label are numbered, again according to the numbering of netting label by the wire of reference numeral successively continuous coiling, realize netting, the method takes continuous coiling formula netting mode, every root netting twine is connected with outside by means of only an input port, greatly reduces tie point number, improves reliability and production efficiency.

As another embodiment of the present invention, the input end of the wire of the multiple winding of each continuous coiling and holding altogether is all drawn by interface unit.

Preferably, the wire in the present invention can adopt the enameled wire of 0.3mm.

In embodiments of the present invention, the input end of the wire after continuous coiling is welded to interface unit, and one is held altogether be also welded to interface unit, signal transmission is carried out by interface unit and external circuit, the embodiment of the present invention can reduce the quantity of pad greatly, improve reliability, and be convenient to the operation of Signal transmissions.

Fig. 2 shows the realization flow of the netting method of the electromagnetic induction matrix that second embodiment of the invention provides, and details are as follows:

The X-direction of this electromagnetic induction matrix has N1 root wire, and the Y direction of this electromagnetic induction matrix has N2 root wire, and N1, N2 are the integer being greater than 2, and M1 is the integer being greater than N1, and M2 is the integer being greater than N2.

In step s 201, respectively the N1 root wire of X-direction, the N2 root wire of Y direction are numbered;

In embodiments of the present invention, wire is numbered, such as 1 ..., 21, certainly, the quantity of wire is not limited to 21, also can be 27, and other 3 doubly several, namely N1, N2 are preferably the integral multiple of 3.

In step S202, the X-direction of electromagnetic induction matrix comprises laterally the first name region X1 and laterally the second name region X2, Y direction comprises longitudinally the first name region and longitudinally the second name region, laterally the first name region X1 comprises (N1-2) individual netting label, longitudinally the first name region comprises (N2-2) individual netting label, laterally the second name region X2 comprises (M1-N1+2) individual netting label, longitudinally the second name region comprises (M2-N2+2) individual netting label, (M1-N1+2), (M2-N2+2) integral multiple being 3 more than 1 integer, the first interval L1 is preset as between each netting label,

In embodiments of the present invention, this transverse direction first name region X1, laterally the second name region X2, longitudinally the first name region Y1 and longitudinally the second name region Y2 are only used for distinguishing the rule being numbered netting label, naming, not actual physics subregion.

In step S203, by (N1-2) the individual netting label number consecutively in horizontal the first name region X1 be (N1-2), (N1-1) ..., 1, by (N2-2) the individual netting label number consecutively in longitudinal the first name region be (N2-2), (N2-1) ..., 1;

In step S204, to laterally second name (M2-N2+1) the individual netting label in (M1-N1+1) the individual netting label in the X2 of region except last netting label, longitudinally the second name region to be divided into several groups respectively, each group comprises three netting labels;

In step S205, respectively the netting label of each group of X-direction is numbered according to a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of X-direction does not all repeat, respectively the netting label of each group of Y direction is numbered according to a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of Y direction does not all repeat, a is the integer divided by more than 30, and b is the integer divided by more than 31, and c is the integer divided by more than 32.

In embodiments of the present invention, laterally second the numbering of the many groups netting label in region is being named to take assembled arrangement to name, namely the numbering often organizing three netting labels is different number of combinations to determine the uniqueness of contact position, such as, one group of netting label be numbered 3,5,7, another group netting label be numbered 8,4,6.

In step S206, will laterally second name region X2 and longitudinally second name last netting label in the Y2 of region to be all numbered 0;

For convenience of description, Fig. 7 illustrate only the structural representation of 21 wires, but the present invention not with this structure for restriction, and the structure with multiple conducting wires can be known by inference according to the embodiment of the present invention.

In embodiments of the present invention, the X-direction of electromagnetic induction matrix comprises laterally the first name region X1 and laterally the second name region X2, wherein, laterally first naming in region, successively to netting tag number be 19,18 ..., 1, in horizontal second name region, be divided into one group by every for netting label three, each group is numbered according to the order of a, c, b or c, b, a or b, a, c, such as: 3,5,7; 8,4,6; 10,3,5.Wherein a represents the integer divided by more than 30, and b represents the integer divided by more than 31, and c represents the integer divided by more than 32, and is 0 by last netting tag number.First interval of 12mm is set between two netting labels.Can know by inference, laterally second name the setting of the grouping number in region specifically can arrange according to actual netting size, density, certainly, because the numbering often organized between netting label can not repeat also to need the wire support by preset number.

It should be noted that often group can comprise odd number netting label, and be not limited to three netting labels, concrete value can be arranged according to actual needs, and it is larger that this numerical value is arranged, and this netting is more intensive, and recognition capability is more accurate, but while also correspondingly to raise the cost.

In step S207, the N1 root wire of X-direction is carried out continuous coiling successively according to the numbering of the M1 of X-direction netting label and forms multiple winding, the N2 root wire of Y direction is carried out continuous coiling successively according to the numbering of the M2 of Y direction netting label and forms multiple winding;

In step S208, using one end of the wire of multiple for each continuous coiling winding as input end, other end ground connection, to complete netting.

In embodiments of the present invention, by wire successively according to laterally first naming the numbering in region, laterally the second name region on netting label to be corresponding in turn to coiling, namely a wire can be multiple winding continuously across the coiling of multiple netting label, but still only correspondence one detects link, therefore the cable port of netting can be reduced in a large number, simplify circuit, improve reliability.

In embodiments of the present invention, for the winding method of Y direction and the winding method of X-direction consistent, repeat no more herein.

Fig. 3 shows the realization flow of the netting method of the electromagnetic induction matrix that third embodiment of the invention provides, and details are as follows:

In step S301, respectively the N1 root wire of X-direction, the N2 root wire of Y direction are numbered;

In step s 302, the X-direction of electromagnetic induction matrix comprises laterally the first name region X1 and laterally the second name region X2, Y direction comprises longitudinally the first name region and longitudinally the second name region, laterally the first name region X1 comprises (N1-2) individual netting label, longitudinally the first name region comprises (N2-2) individual netting label, laterally the second name region X2 comprises (M1-N1+2) individual netting label, longitudinally the second name region comprises (M2-N2+2) individual netting label, (M1-N1+2), (M2-N2+2) integral multiple being 3 more than 1 integer, the first interval L1 is preset as between each netting label,

In step S303, by (N1-2) the individual netting label number consecutively in horizontal the first name region X1 be (N1-2), (N1-1) ..., 1, by (N2-2) the individual netting label number consecutively in longitudinal the first name region be (N2-2), (N2-1) ..., 1;

In step s 304, to laterally second name (M2-N2+1) the individual netting label in (M1-N1+1) the individual netting label in the X2 of region except last netting label, longitudinally the second name region to be divided into several groups respectively, each group comprises three netting labels;

In step S305, respectively the netting label of each group of X-direction is numbered according to a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of X-direction does not all repeat, respectively the netting label of each group of Y direction is numbered according to a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of Y direction does not all repeat, a is the integer divided by more than 30, and b is the integer divided by more than 31, and c is the integer divided by more than 32.

In step S306, will laterally second name region X2 and longitudinally second name last netting label in the Y2 of region to be all numbered 0;

In step S307, according to laterally first naming the corresponding Stationary liquid of each netting tag number in the X1 of region with the wire of numbering, the wire being numbered N1, N1-1 and the wire being numbered N1-2 are fixed on simultaneously and are numbered on the netting label of N1-2, according to longitudinally first naming the corresponding Stationary liquid of each netting tag number in region with the wire of numbering, the wire being numbered N2, N2-1 and the wire being numbered N2-2 are fixed on simultaneously and are numbered on the netting label of N2-2;

In embodiments of the present invention, bonding agent fixing cord can be adopted, also can adopt fixture fixing cord, such as, in the corner of wire coiling by nail 12 fixing cord, and each nail can be fixed on the multiple conducting wires turning to coiling herein, see Fig. 7 simultaneously.

In step S308, laterally first naming the wire wraparound after presetting the first interval L1 being numbered N1 in the X1 of region, be numbered wire wraparound after presetting the second interval L2 of N1-1, be numbered wire wraparound after presetting the 3rd interval L3 of N1-2 to 1, longitudinally first naming the wire wraparound after presetting the first interval L1 being numbered N2 in region, be numbered wire wraparound after presetting the second interval L2 of N2-1, be numbered wire wraparound after presetting the 3rd interval L3 of N2-2 to 1, second interval L2 is two times of the first interval L1 distance, 3rd interval L3 is three times of the first interval L1 distance,

In step S309, in X-direction, wire after wraparound forms multiple winding according to the netting tag number correspondence in horizontal second name region X2 successively continuous coiling, the coiling of this winding is spaced apart the 3rd interval L3, last laterally in the second name region X2 organizes three wires corresponding to netting tag number respectively through the 3rd interval L3, second interval L2, first interval L1 wraparound, and be fixed on last netting label of laterally the second name region X2 simultaneously, in Y direction, wire after wraparound forms multiple winding according to the netting tag number correspondence in longitudinal second name region Y2 successively continuous coiling, the coiling of this winding is spaced apart the 3rd interval L3, last laterally in the second name region X2 organizes three wires corresponding to netting tag number respectively through the 3rd interval L3, second interval L2, first interval L1 wraparound, and be fixed on last netting label of longitudinally the second name region Y2 simultaneously.

As one embodiment of the present invention, between every two the adjacent windings by the wire continuous coiling of same numbering, the multiple winding in interval, the quantity of this interval winding should be not less than 6, is preferably greater than 9.

In step S310, using one end of the wire of multiple for each continuous coiling winding as input end, other end ground connection, to complete netting.

In embodiments of the present invention, see Fig. 7, laterally first naming in the X1 of region, being fixed on by three wires 21,20,19 is numbered on the first netting label of 19, the wire being numbered 18-1 respectively corresponding being fixed on is numbered on the netting label of 18-1, wire 21 wraparound behind first interval of 12mm, overlaps with wire 18 and is fixed on netting label 18.Wire 20 wraparound behind second interval of 24mm, overlaps with wire 17 and is fixed on netting label 17.Wire 19 wraparound behind the 3rd interval of 36mm, overlap with wire 16 and be fixed on netting label 16, wire 18 to wire 1 is wraparound behind the 3rd interval of 36mm all.

Laterally second naming in the X2 of region, wire through a coiling is fixed according to the netting tag number of correspondence again, and continuous coiling becomes multiple winding respectively, each winding lay out the 3rd interval L3 between line and wraparound line with 36mm, namely every root wire can carry out repeatedly coiling again, and through the 3rd interval wraparound of 36mm at every turn after fixing, until last group netting label in this horizontal second name region, i.e. last three netting labels (8, 4, 6) upper fixing wire is respectively through the 3rd interval of 36mm, second interval of 24mm, wraparound behind first interval of 12mm, and be fixed on last and be numbered on the netting label of 0, in embodiments of the present invention, first three root wire of X-axis is arranged in same groove, rear three wires are arranged in same groove, all the other two wires be simultaneously fixed on same netting label are arranged in same groove, to complete the netting of X-direction, the netting method of Y direction and X-axis are always, do not repeating herein.

Fig. 4 shows the realization flow of contact positioning method corresponding to the netting method of the electromagnetic induction matrix that fourth embodiment of the invention provides, and details are as follows:

As one embodiment of the invention, this contact positioning method also comprises the steps: after the netting method performing above-described embodiment

In step S401, obtain the induced voltage of the N1 root wire of X-direction and the N2 root wire of Y direction respectively by closed-loop path;

In embodiments of the present invention, when time writer touching blank, transmit, every root wire forms a loop by above-described embodiment coiling, produces induced signal at corresponding wire winding position, now, can obtain induced voltage by scanning.

In step S402, determine the lead location corresponding to the strongest induced voltage;

In step S403, judge that the induced voltage of the adjacent wires of wire corresponding to the strongest induced voltage is whether in predetermined threshold value;

If so, then perform step S404, the information of the lead location corresponding to the strongest induced voltage generates contact coordinate;

If not, then execution step S405, replaces the strongest induced voltage by time strong induced voltage, and returns execution step S402.

In embodiments of the present invention, find the strongest induced voltage signal, and determine the position of wire in electromagnetic induction matrix sending this signal, afterwards the induced voltage that the wire sending the strongest induced voltage signal left and right (X-direction) or upper and lower (Y direction) adjacent wire send is judged (X-direction and Y direction all adopt the present embodiment to judge), when the induced voltage of its adjacent wires is in default threshold voltage ranges, then think that this position is contact.When the induced voltage of its adjacent wires is not in default threshold voltage ranges, the induced voltage signal then finding the second intensity replaces the strongest induced voltage signal, return the step performing S402, re-start judgement, until find the contact meeting threshold range, this threshold value can according to actual blank sensitivity need arrange.

In embodiments of the present invention, based on the continuous netting method building large area loop, by carrying out the method for auxiliary positioning to the both sides wire of maximum induced signal position, successively the first strength signal is screened in conjunction with threshold value, avoid the signal drift phenomenon caused by time writer pitch angle too small (lower than 30 degree of angles), realize accurately location, and can write with arbitrarily angled.

Fig. 5 shows the realization flow of contact positioning method corresponding to the netting method of the electromagnetic induction matrix that fifth embodiment of the invention provides, and the electromagnetic induction matrix that the netting method that this contact positioning method provides based on above-described embodiment is formed realizes, and details are as follows:

In step S501, obtain the induced voltage of the N1 root wire of X-direction and the N2 root wire of Y direction respectively by closed-loop path;

In step S502, determine the lead location corresponding to the strongest induced voltage;

In step S503, judge that the induced voltage of the adjacent wires of wire corresponding to the strongest induced voltage is whether in predetermined threshold value;

If so, then step S504 and step S505 is performed successively;

In step S504, the wire count obtaining the information of lead location corresponding to the strongest induced voltage, this information comprises sequence number between induction zone that the lead location corresponding to the strongest induced voltage is positioned at, comprise between induction zone that lead location corresponding to the strongest induced voltage is positioned at and off-set value;

In embodiments of the present invention, be between multiple induction zone by the electromagnetic induction matrix trace inequality of sensor sensing layer, one numbering is set between each induction zone, in embodiments of the present invention, first three root wire that first netting label correspondence is fixed is arranged in same groove and (is not limited to arrange groove, three wires also can be positioned at same fixed position close-packed arrays), by the groove of the corresponding multiple wire of the first netting label or fixed position (comprising this groove or this fixed position) to first wire (comprising first wire) electromagnetic induction matrix edge between region be defined as V between the first induction zone ₁, V between this first induction zone ₁comprise three wires (21,20,19), two wires (21,18) that second netting label is corresponding are also arranged in same groove, by the groove of the corresponding fixing cord of the second netting label or fixed position to electromagnetic induction matrix edge between region be defined as V between the second induction zone ₂, the like, the corresponding induction region V of each netting label _nbut last netting label 0 does not list the range of definition in, therefore each induction region comprises odd number root number of conductors respectively, as 3,5,7 ...

In step S505, by sequence number, wire count and off-set value between the induction zone of acquisition according to formula:

X=(n1 × V _n1)+n1-K1, Y=(n2 × V _n2)+n2-K2 calculates contact coordinate;

Wherein X is the coordinate of X-axis, V _n1sequence number between the induction zone of the lead location corresponding to the strongest induced voltage of X-direction, V between the induction zone of the lead location of n1 corresponding to the strongest induced voltage of X-direction _n1the wire count comprised, V between the induction zone of the lead location of K1 corresponding to the strongest induced voltage of X-direction _n1off-set value, Y is the coordinate of Y-axis, V _n2the V of the lead location corresponding to the strongest induced voltage of Y direction _n2sequence number, V between the induction zone of the lead location of n2 corresponding to the strongest induced voltage of Y direction _n2the wire count comprised, V between the induction zone of the lead location of K2 corresponding to the strongest induced voltage of Y direction _n2off-set value.

If not, then execution step S506, replaces the strongest induced voltage by time strong induced voltage, and returns execution step S502.

As one embodiment of the present invention, off-set value K can pass through following formulae discovery:

K=[(n × V _n)+A] %n, wherein V _nsequence number between the induction zone of the lead location corresponding to the strongest induced voltage, the wire count comprised between the induction zone of the lead location of n corresponding to the strongest induced voltage, the numbering of the wire of A corresponding to the strongest induced voltage, % is complementation symbol (i.e. [(n × V _n)+A] divided by remainder fractional part after n), such as: n=5, V _n=3, A=4, then [(5 × 3)+4] %5=4.

Fig. 6 shows the structure of the electromagnetic induction matrix that one embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to inventive embodiments.

This electromagnetic induction matrix 1 can be applied in any interactive electric whiteboard, and this electromagnetic induction matrix 1 comprises:

The X-direction of electromagnetic induction matrix 1 has N1 root wire, and the Y direction of electromagnetic induction matrix has N2 root wire, and N1, N2 are the integer being greater than 2, and M1 is the integer being greater than N1, and M2 is the integer being greater than N2;

The N1 root wire of X-direction, the N2 root wire of Y direction are provided with numbering;

X-direction has M1 and establishes numbered netting label 11, and Y direction has M2 and establishes numbered netting label;

Electromagnetic induction matrix comprises multiple winding, the winding of X-direction is formed according to the numbering continuous coiling of the M1 of X-direction netting label by the N1 root wire of X-direction, multiple windings of Y direction are formed according to the numbering continuous coiling of the M2 of Y direction netting label by the N2 root wire of Y direction, and one end of the wire of the multiple winding of each continuous coiling is as input end, the other end is as earth terminal, and multiple described earth terminal is formed altogether to be held altogether.

In embodiments of the present invention, first according to the rule preset, wire and netting label are numbered, again according to the numbering of netting label by the wire of reference numeral successively continuous coiling, form continuous print netting structure, every root netting twine is connected with outside by means of only an input end, greatly reduce tie point, improve reliability.

As one embodiment of the invention, this electromagnetic induction matrix 1 can also comprise:

Interface unit 2, this interface unit is connected with the input end of the described wire of the multiple winding of each continuous coiling, for exporting the induced voltage that described electromagnetic induction matrix generates.

As one embodiment of the invention, this interface unit 2 can adopt the pcb board being welded with porous connector to realize, and understandably, the concrete pcb board of which kind of type that adopts can be selected as required.

In embodiments of the present invention, the input end of the wire after continuous coiling is welded to interface unit, carries out signal transmission by interface unit and external circuit, the embodiment of the present invention can reduce the quantity of pad greatly, improve reliability, and be convenient to the operation of Signal transmissions.

Fig. 7 show that one embodiment of the invention provides for the structure of the electromagnetic induction matrix of 21 wires, for convenience of explanation, illustrate only the part relevant to inventive embodiments.

In embodiments of the present invention, the X-direction of electromagnetic induction matrix 1 comprises laterally the first name region X1 and laterally the second name region X2, the Y-axis of electromagnetic induction matrix 1 comprises longitudinally the first name region and longitudinally the second name region, laterally the first name region comprises (N1-2) individual netting label, longitudinally the first name region comprises (N2-2) individual netting label, laterally the second name region comprises (M1-N1+2) individual netting label, longitudinally the second name region comprises (M2-N2+2) individual netting label, (M1-N1+2), (M2-N2+2) integral multiple being 3 more than 1 integer, the first interval L1 is preset as between each netting label,

(N1-2) individual netting tag number laterally in the first name region be followed successively by (N1-2), (N1-1) ..., 1, (N2-2) the individual netting tag number longitudinally in the first name region be followed successively by (N2-2), (N2-1) ..., 1;

(M2-N2+1) individual netting label in (M1-N1+1) individual netting label laterally in the second name region except last netting label, longitudinally the second name region except last netting label comprises several groups respectively, and each group comprises three netting labels;

The netting label of each group of X-direction, Y direction is all numbered with a, c, b or c, b, a or b, a, c, and the numbering combination often organizing netting label of X-direction, Y direction does not all repeat, a is the integer divided by more than 30, and b is the integer divided by more than 31, and c is the integer divided by more than 32;

This transverse direction second name region X2 is numbered 0 with last netting label in longitudinal second name region Y2.

In embodiments of the present invention, laterally first naming in region, successively to netting tag number be 19,18 ..., 21, one group is divided into by every for netting label three in horizontal second name region, each group is numbered according to the order of a, c, b or c, b, a or b, a, c, such as: 3,5,7; 8,4,6; 10,3,5.Wherein a represents the integer divided by more than 30, and b represents the integer divided by more than 31, and c represents the integer divided by more than 32.First interval of 12mm is set between two netting labels.Can know by inference, laterally second name the setting of the grouping number in region specifically can arrange according to actual netting size, density, certainly, because the numbering often organized between netting label can not repeat also to need the wire support by preset number.For the winding method of Y direction and the winding method one of X-direction to, repeat no more herein.

As one embodiment of the invention, composition graphs 6 and Fig. 7, the corresponding Stationary liquid of each netting tag number laterally in the first name region X1 is with the wire of numbering, the wire being numbered N1, N1-1 and the wire being numbered N1-2 are fixed on simultaneously and are numbered on the netting label of N1-2, the corresponding Stationary liquid of each netting tag number longitudinally in the first name region is with the wire of numbering, and the wire being numbered N2, N2-1 and the wire being numbered N2-2 are fixed on simultaneously and are numbered on the netting label of N2-2;

The coiling being laterally numbered the wire of N1 in the first name region X1 is spaced apart default 3rd interval L3, the coiling being numbered the wire of N1-1 is spaced apart default second interval L2, the coiling being numbered the wire of N1-2 to 1 is spaced apart default first interval L1, the coiling being longitudinally numbered the wire of N2 in the first name region is spaced apart default 3rd interval, the coiling being numbered the wire of N2-1 is spaced apart default second interval, the coiling being numbered the wire of N2-2 to 1 is spaced apart default first interval L1, second interval L2 is two times of the first interval L1 distance, 3rd interval L3 is three times of the first interval L1 distance,

In X-direction, wire correspondence after wraparound is fixed on the netting label of identical numbering in horizontal second name region X2, its coiling is spaced apart the 3rd interval L3, the coiling interval of three wires (8,4,6) that last group netting tag number laterally in the second name region X2 is corresponding is respectively the 3rd interval L3, the second interval L2, the first interval L1, and this three signals (8,4,6) wire-wound is fixed on last netting label 0 of laterally the second name region X2 simultaneously after returning;

In Y direction, wire correspondence after wraparound is fixed on the netting label of identical numbering in longitudinal second name region, its coiling is spaced apart the 3rd interval L3, the coiling interval of three wires that last group netting tag number laterally in the second name region is corresponding is respectively the 3rd interval L3, the second interval L2, the first interval L1, is fixed on described longitudinal direction second simultaneously names on last netting label of region Y2 after these three wire wraparounds.

In embodiments of the present invention, laterally first naming in the X1 of region, being fixed on by three wires 21,20,19 is numbered on the first netting label of 19, the wire being numbered 18-1 respectively corresponding being fixed on is numbered on the netting label of 18-1, wire 21 wraparound behind first interval of 12mm, overlaps with wire 18 and is fixed on netting label 18.Wire 20 wraparound behind second interval of 24mm, overlaps with wire 17 and is fixed on netting label 17.Wire 19 wraparound behind the 3rd interval of 36mm, overlap with wire 16 and be fixed on netting label 16, wire 18 to wire 1 is wraparound behind the 3rd interval of 36mm all.

Laterally second naming in the X2 of region, wire through a coiling continues according to laterally second naming the numbering of netting label in region to carry out coiling, every root wire can carry out repeatedly coiling again, and through the 3rd interval wraparound of 36mm at every turn after fixing, until last group netting label in this horizontal second name region, namely fixing on last three netting labels wire is respectively through the 3rd interval of 36mm, second interval of 24mm, wraparound behind first interval of 12mm, make on netting label, first three root wire is arranged in a groove, rear three wires are arranged in a groove, to complete the netting of X-direction, the netting method of Y direction and X-axis are always, do not repeating herein.

In embodiments of the present invention, can adopt bonding agent fixing cord, also can adopt fixture fixing cord, such as, in the corner of wire coiling by nail 12 fixing cord, and a nail can be fixed on the multiple conducting wires turning to coiling herein simultaneously.

Fig. 8 shows the structure of contact locating device corresponding to electromagnetic induction matrix that one embodiment of the invention provides, for convenience of explanation, illustrate only the part relevant to inventive embodiments.

As the embodiment of the present invention, this device 3 is connected with the conductor signal test side of electromagnetic induction matrix 1, comprising:

Induced voltage acquiring unit 31, for obtaining the induced voltage of the N1 root wire of X-direction and the N2 root wire of Y direction respectively by closed-loop path;

Positioning unit 32, the input end of this positioning unit 32 is connected with the output terminal of induced voltage acquiring unit 31, for determining the lead location corresponding to the strongest induced voltage;

Judging unit 33, the input end of this judging unit 33 is connected with the output terminal of positioning unit 32, for judging that the induced voltage of the adjacent wires of the wire that the strongest induced voltage is corresponding is whether in predetermined threshold value;

Contact coordinate generation unit 34, the input end of this contact coordinate generation unit 34 is connected with the output terminal of judging unit 33, for when the induced voltage of the adjacent wires when wire corresponding to the strongest induced voltage is in predetermined threshold value, the information of the lead location corresponding to the strongest induced voltage generates contact coordinate;

Replacement unit 35, the input end of this replacement unit 35 is connected with the output terminal of judging unit 33, the output terminal of replacement unit 35 is connected with the control end of positioning unit 32, for when the induced voltage of the adjacent wires when wire corresponding to the strongest induced voltage is not in predetermined threshold value, time strong induced voltage is replaced the strongest induced voltage, and controls judging unit 33 and rejudge.

As one embodiment of the invention, contact coordinate generation unit 34 comprises:

Location information acquiring unit 341, the input end of this location information acquiring unit 341 is the input end of contact coordinate generation unit 34, for obtaining the information of the lead location corresponding to the strongest induced voltage, information comprises the wire count, the off-set value that comprise between induction zone that between induction zone that position is positioned at, sequence number, position are positioned at;

Computing unit 342, the input end of computing unit 342 is connected with the output terminal of location information acquiring unit 341, for according to formula X=(n1 × V _n1)+n1-K1, Y=(n2 × V _n2)+n2-K2 calculates contact coordinate, X is the coordinate of X-axis, V _n1sequence number between the induction zone of the lead location corresponding to the strongest induced voltage of X-direction, V between the induction zone of the lead location of n1 corresponding to the strongest induced voltage of X-direction _n1the wire count comprised, V between the induction zone of the lead location of K1 corresponding to the strongest induced voltage of X-direction _n1off-set value, Y is the coordinate of Y-axis, V _n2sequence number between the induction zone of the lead location corresponding to the strongest induced voltage of Y direction, V between the induction zone of the lead location of n2 corresponding to the strongest induced voltage of Y direction _n2the wire count comprised, V between the induction zone of the lead location of K2 corresponding to the strongest induced voltage of Y direction _n2off-set value.

As one embodiment of the present invention, off-set value K is by following formulae discovery:

K=[(n × V _n)+A] %n, wherein V _nsequence number between the induction zone of the lead location corresponding to the strongest described induced voltage, n for described in lead location corresponding to the strongest induced voltage induction zone between V _nthe wire count comprised, A is sequence number in group, and % is complementation symbol.

Fig. 9 shows the structure of the interactive electric whiteboard that one embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to inventive embodiments.

As one embodiment of the invention, this interactive electric whiteboard 4 comprises contact locating device 3, this contact locating device 3 is as a part for interactive electric whiteboard treating apparatus 42, both can be built in the part of interactive electric whiteboard plate core 41, also can be placed on interactive electric whiteboard plate core 41 part so that dismounting and maintenance.

In embodiments of the present invention, after netting terminates, can the input end of the wire finished in electromagnetic induction matrix be welded on interface unit 2, be packaged in plate core 41 part of interactive electric whiteboard 4 together, and by winding displacement 5, interface unit 2 is connected with contact locating device 3, make the plate core segment inside of interactive electric whiteboard not containing any circuit, be convenient to dismounting and change and maintenance.

It should be noted that in embodiments of the present invention, the input end of every root wire can be connected with interface unit 2 with earth terminal, and form a closed loop, for detection, such as in embodiments of the present invention, there are 44 links be connected with interface unit 2.

As one embodiment of the invention, this interface unit 2 can adopt pcb board, be connected with contact locating device 3 by the porous connector above pcb board, Figure 10 (a) shows the Facad structure of this pcb board, wherein X1-X21 is the link with X-direction wire 1-21, and GND is the link of ground wire.Figure 10 (b) shows the inverse layer structure of this pcb board, and wherein Y1-Y21 is the link with Y direction wire 1-21, and GND is the link of ground wire.

Be appreciated that, Figure 10 is only convenient to the embodiment of description as one, and the concrete quantity of interface unit 2 with wire connecting ends can be determined according to the number of conductors of actual needs netting, be not limited to 22 links, when the wire of X-axis is N1 root, pcb board can expand to X1-XN1 with the link of X-axis wire, when the wire of Y-axis is N2 root, pcb board can expand to Y1-YN2 with the link of Y-axis wire.

Beneficial effect:

1, the embodiment of the present invention is first numbered wire and netting label according to the rule preset, again according to the numbering of netting label by the wire of reference numeral successively continuous coiling, realize netting, namely a wire can be multiple winding continuously across the coiling of multiple netting label, the method takes continuous coiling formula netting mode, every root wire is connected with outside by means of only a link, greatly reduce tie point number, avoid because connecting the fault of slipping up and causing, and decrease in later stage use procedure, tie point disconnects the failure problems caused, simultaneously also because significantly reducing pad, production efficiency is improved greatly, significantly reduce the area of interface unit simultaneously, simplify circuit, reduce costs, improve reliability and stock utilization, just dismounting and change.

2, based on the continuous netting method building large area loop, by carrying out the method for auxiliary positioning to the both sides wire of maximum induced signal position, successively the first strength signal is screened in conjunction with threshold value, avoid the signal drift phenomenon caused by time writer pitch angle too small (lower than 30 degree of angles), realize accurately location, and allow time writer can write with arbitrarily angled, improve the ease for use of electronic whiteboard.

3, two ports of the wire finished in electromagnetic induction matrix and ground wire are welded on interface unit, be packaged in the plate core segment of interactive electric whiteboard together, and by winding displacement, interface unit is connected with the contact locating device being placed on plate core, make the plate core segment inside of interactive electric whiteboard not containing any circuit and electron device, contact locating device containing electron device is placed on whiteboard core, improves global reliability and the ease for maintenance of blank.

These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims

1. the netting method of an electromagnetic induction matrix, it is characterized in that, the X-direction of described electromagnetic induction matrix has N1 root wire, and the Y direction of described electromagnetic induction matrix has N2 root wire, described N1, N2 are the integer being greater than 2, and described netting method comprises the steps:

2. netting method as claimed in claim 1, is characterized in that, the input end of the described wire of the multiple winding of each continuous coiling and holding altogether is all drawn by interface unit.

3. netting method as claimed in claim 1, it is characterized in that, described wire described in the N1 root of X-direction is carried out continuous coiling successively according to the numbering of the M1 of X-direction described netting label, the step that wire described in the N2 root of Y direction carries out continuous coiling successively according to the numbering of the M2 of Y direction described netting label is specially:

Name the corresponding Stationary liquid of each netting tag number in region with the described wire of numbering according to described transverse direction first, be numbered N1, the described wire of (N1-1) is fixed on the described wire being numbered (N1-2) simultaneously and is numbered on the netting label of (N1-2), name the corresponding Stationary liquid of each netting tag number in region with the described wire of numbering according to described longitudinal direction first, be numbered N2, the described wire of (N2-1) is fixed on the described wire being numbered (N2-2) simultaneously and is numbered on the netting label of (N2-2);

The described wire wraparound after presetting the first interval being numbered N1 is named in region in described transverse direction first, be numbered described wire wraparound after presetting the second interval of (N1-1), be numbered described wire wraparound after presetting the 3rd interval of (N1-2) to 1, the described wire wraparound after presetting the first interval being numbered N2 is named in region in described longitudinal direction first, be numbered described wire wraparound after presetting the second interval of (N2-1), be numbered described wire wraparound after presetting the 3rd interval of (N2-2) to 1, described second is spaced apart two times of described first spacing distance, described 3rd is spaced apart three times of described first spacing distance,

In X-direction, described wire after wraparound according to described transverse direction second name the netting tag number correspondence in region successively continuous coiling form multiple winding, the coiling of described winding is spaced apart described 3rd interval, three wires that described transverse direction second names last group netting tag number in region corresponding are respectively through described 3rd interval, described second interval, described first interval wraparound is also fixed on described transverse direction second simultaneously and is named on last netting label in region, in Y direction, described wire after wraparound according to described longitudinal direction second name the netting tag number correspondence in region successively continuous coiling form multiple winding, the coiling of described winding is spaced apart the 3rd interval, three wires that described longitudinal direction second names last group netting tag number in region corresponding are respectively through described 3rd interval, described second interval, described first interval wraparound is also fixed on described longitudinal direction second simultaneously and is named on last netting label in region.

4., to a contact positioning method for the electromagnetic induction matrix that the netting method as described in any one of claims 1 to 3 is formed, it is characterized in that, described contact positioning method comprises the steps:

Determine the lead location corresponding to the strongest induced voltage;

5. method as claimed in claim 4, is characterized in that, the step of the information generation contact coordinate of the lead location described in described basis corresponding to the strongest induced voltage is specially:

The information of the lead location described in acquisition corresponding to the strongest induced voltage, described information comprises the wire count, the off-set value that comprise between induction zone that between induction zone that described position is positioned at, sequence number, described position are positioned at;

According to formula X=(n1 × V _n1)+n1-K1, Y=(n2 × V _n2)+n2-K2 calculates contact coordinate, described X is the coordinate of X-axis, described V _n1sequence number between the induction zone of the lead location corresponding to the strongest induced voltage described in X-direction, the wire count comprised between the induction zone of the lead location of described n1 corresponding to the strongest induced voltage described in described X-direction, off-set value between the induction zone of the lead location of described K1 corresponding to the strongest induced voltage described in X-direction, described Y is the coordinate of Y-axis, described V _n2sequence number between the induction zone of the lead location corresponding to the strongest induced voltage described in Y direction, the wire count that the region of the lead location of described n2 corresponding to the strongest induced voltage described in described Y direction comprises, the off-set value between the induction zone of the lead location of described K2 corresponding to the strongest induced voltage described in Y direction.

6. method as claimed in claim 5, is characterized in that, described off-set value is by following formulae discovery:

K=[(n × V _n)+A] %n, described K be off-set value, V _nsequence number between the induction zone of the lead location corresponding to the strongest described induced voltage, n for described in lead location corresponding to the strongest induced voltage induction zone between the wire count that comprises, A for described in the numbering of wire corresponding to the strongest induced voltage, % is complementation symbol.

7. an electromagnetic induction matrix, is characterized in that, described electromagnetic induction matrix comprises:

Described X-direction has M1 and establishes numbered netting label, and described Y direction has M2 and establishes numbered netting label, and described M1 is the integer being greater than described N1, and described M2 is the integer being greater than described N2;

8. electromagnetic induction matrix as claimed in claim 7, it is characterized in that, described electromagnetic induction matrix also comprises:

Interface unit, the input end of described interface unit and the described wire of the multiple winding of each continuous coiling and holding altogether is connected, for exporting the induced voltage that described electromagnetic induction matrix generates.

9. electromagnetic induction matrix as claimed in claim 8, it is characterized in that, described interface unit is the pcb board being welded with porous connector.

10. electromagnetic induction matrix as claimed in claim 7, is characterized in that:

Described transverse direction first names the corresponding Stationary liquid of each netting tag number in region with the described wire of numbering, be numbered N1, the described wire of (N1-1) is fixed on the described wire being numbered (N1-2) simultaneously and is numbered on the netting label of (N1-2), described longitudinal direction first names the corresponding Stationary liquid of each netting tag number in region with the described wire of numbering, is numbered N2, the described wire of (N2-1) is fixed on the described wire being numbered (N2-2) simultaneously and is numbered on the netting label of (N2-2);

Described transverse direction first names in region the coiling of the described wire being numbered N1 to be spaced apart default 3rd interval, the coiling being numbered the described wire of (N1-1) is spaced apart default second interval, the coiling being numbered the described wire of (N1-2) to 1 is spaced apart default first interval, described longitudinal direction first names in region the coiling of the described wire being numbered N2 to be spaced apart default 3rd interval, the coiling being numbered the described wire of (N2-1) is spaced apart default second interval, the coiling being numbered the described wire of (N2-2) to 1 is spaced apart default first interval, described second is spaced apart two times of described first spacing distance, described 3rd is spaced apart three times of described first spacing distance,

In X-direction, described wire correspondence after wraparound is fixed on the netting label that described transverse direction second names identical numbering in region, its coiling is spaced apart described 3rd interval, described transverse direction second names the coiling interval of three wires corresponding to last group netting tag number in region to be respectively described 3rd interval, described second interval, described first interval, is fixed on described transverse direction second simultaneously and names on last netting label in region after described three wire wraparounds;

In Y direction, described wire correspondence after wraparound is fixed on the netting label that described longitudinal direction second names identical numbering in region, its coiling is spaced apart described 3rd interval, described longitudinal direction second names the coiling interval of three wires corresponding to last group netting tag number in region to be respectively described 3rd interval, described second interval, described first interval, is fixed on described longitudinal direction second simultaneously names on last netting label in region after described three wire wraparounds.

11. 1 kinds of interactive electric whiteboards, is characterized in that, the electromagnetic induction matrix in described electronic whiteboard is the electromagnetic induction matrix as described in any one of claim 7 to 10.

12. 1 kinds of contact locating devices, is characterized in that, described device is corresponding with the wire of the electromagnetic induction matrix as described in any one of claim 7 to 10 to be connected, and described device comprises:

13. devices as claimed in claim 12, it is characterized in that, described contact coordinate generation unit comprises:

Location information acquiring unit, the input end of described location information acquiring unit is the input end of described contact coordinate generation unit, for the information of the lead location corresponding to the strongest induced voltage described in obtaining, described information comprises the wire count, the off-set value that comprise between induction zone that between induction zone that described position is positioned at, sequence number, described position are positioned at;

Computing unit, the input end of described computing unit is connected with the output terminal of described location information acquiring unit, for according to formula X=(n1 × V _n1)+n1-K1, Y=(n2 × V _n2)+n2-K2 calculates contact coordinate, described X is the coordinate of X-axis, described V _n1sequence number between the induction zone of the lead location corresponding to the strongest induced voltage described in X-direction, the wire count comprised between the induction zone of the lead location of described n1 corresponding to the strongest induced voltage described in described X-direction, off-set value between the induction zone of the lead location of described K1 corresponding to the strongest induced voltage described in X-direction, described Y is the coordinate of Y-axis, described V _n2sequence number between the induction zone of the lead location corresponding to the strongest induced voltage described in Y direction, the wire count comprised between the induction zone of the lead location of described n2 corresponding to the strongest induced voltage described in described Y direction, the off-set value between the induction zone of the lead location of described K2 corresponding to the strongest induced voltage described in Y direction.

14. devices as claimed in claim 13, is characterized in that, described off-set value is by following formulae discovery:

15. 1 kinds of interactive electric whiteboards, is characterized in that, the contact locating device in described electronic whiteboard is the device as described in any one of claim 12 to 14.

16. electronic whiteboards as claimed in claim 15, it is characterized in that, the contact locating device in described electronic whiteboard is placed on outside the plate core of described electronic whiteboard.

17. electronic whiteboards as claimed in claim 16, it is characterized in that, the interface unit in described electronic whiteboard is connected with described contact locating device by winding displacement.