CN113091965B - Pressure sensor and pressure sensing system - Google Patents
Pressure sensor and pressure sensing system Download PDFInfo
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- CN113091965B CN113091965B CN202110446765.8A CN202110446765A CN113091965B CN 113091965 B CN113091965 B CN 113091965B CN 202110446765 A CN202110446765 A CN 202110446765A CN 113091965 B CN113091965 B CN 113091965B
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- 239000004744 fabric Substances 0.000 claims abstract description 89
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- 238000010586 diagram Methods 0.000 description 15
- 238000002955 isolation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 229920001778 nylon Polymers 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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Abstract
The present application relates to a pressure sensor and a pressure sensing system. The pressure sensor includes: the fabric pressure-sensitive layer is used for changing a physical parameter of the fabric pressure-sensitive layer when the pressure effect is detected; the conductive layer is provided with a plurality of groups of conductive channels, the conductive channels are respectively arranged along a first direction, each group of conductive channels comprises an input channel and an output channel, the input channel and the output channel are arranged at intervals, the input channel is used for receiving input electric signals, the output channel is used for sending output electric signals, and the output electric signals are obtained by the input electric signals passing through the fabric pressure-sensitive layer; the insulating layer is arranged between the fabric pressure-sensitive layer and the conducting layer and comprises a plurality of preset areas, the preset areas and the plurality of groups of conducting channels are arranged in a one-to-one correspondence mode, and the preset areas serve as the conducting channels and the contact areas of the fabric pressure-sensitive layer. The pressure sensor can simplify the wiring of the pressure sensor. The pressure sensing system includes the pressure sensor.
Description
Technical Field
The present application relates to the field of sensor technology, and in particular, to a pressure sensor and a pressure sensing system.
Background
With the rapid development of sensors, more and more pressure sensors are beginning to emerge.
Currently, a common pressure sensor is a matrix-type pressure sensor. The pressure sensor in the form of a matrix realizes the sensing of pressure through the mutual staggered routing of the transverse axis direction and the longitudinal axis direction.
However, the current matrix-type pressure sensor requires a large space for wiring.
Disclosure of Invention
In view of the above, it is desirable to provide a pressure sensor and a pressure sensing system capable of simplifying the wiring of the pressure sensor.
A pressure sensor, comprising:
a fabric pressure sensitive layer for changing its own physical parameter upon detection of the effect of pressure;
the conductive layer is provided with a plurality of groups of conductive channels, the plurality of groups of conductive channels are respectively arranged along a first direction, each group of conductive channels comprises an input channel and an output channel, the input channel and the output channel are arranged at intervals, the input channel is used for receiving input electric signals, the output channel is used for sending output electric signals, and the output electric signals are obtained by the input electric signals passing through the fabric pressure-sensitive layer;
the insulating layer, the insulating layer sets up fabric pressure sensitive layer with between the conducting layer, the insulating layer includes a plurality of preset regions, and a plurality of preset regions set up with the electrically conductive passageway one-to-one of multiunit, preset the region as electrically conductive passageway with the contact area of fabric pressure sensitive layer.
In one embodiment, the conductive layer comprises:
a plurality of sets of conductive lines, the conductive lines including input conductive lines and output conductive lines, the input conductive lines serving as the input channels and the output conductive lines serving as the output channels.
In one embodiment, the fabric pressure sensitive layer is a fabric pressure resistant layer and the physical parameter is a resistance value.
In one embodiment, the preset area is provided with an opening, and the opening exposes the corresponding input channel and the output channel.
In one embodiment, the opening comprises:
a first aperture exposing the corresponding input channel, the first aperture serving as a contact area of the input channel and the fabric pressure sensitive layer;
second openings exposing the corresponding output channels, the second openings serving as contact areas of the output channels and the fabric pressure sensitive layer.
In one embodiment, the opening comprises:
a third opening exposing the input channel, the output channel, and a spaced area between the input channel and the output channel, the third opening serving as a contact area between the conductive channel and the fabric pressure sensitive layer.
In one embodiment, the preset area is provided with a first conductive block, the first conductive block corresponds to the input channel, the first conductive block covers the corresponding input channel, and the first conductive block is used as a contact area of the input channel and the fabric pressure-sensitive layer;
the second conductive blocks correspond to the output channels, cover the corresponding output channels, and serve as contact areas of the output channels and the fabric pressure-sensitive layer;
wherein the first conductive block and the second conductive block do not overlap.
In one embodiment, the distribution shapes of the plurality of preset areas correspond to the shapes of targets, wherein the target shapes are the shapes of contact surfaces of the targets to be recognized and the pressure sensors;
at least two of the preset areas are arranged along the first direction, at least two of the preset areas are arranged along the second direction, the second direction is perpendicular to the first direction, the preset areas extend along the target direction, and the target direction is parallel to or perpendicular to the first direction.
A pressure sensing system comprising a pressure sensor as described above.
In one embodiment, the method further comprises the following steps:
the power supply circuit is used for sending input electric signals to each input channel;
and the sampling end of the sampling circuit is connected with the output channels, and the sampling circuit is used for acquiring the output electric signals sent by each output channel.
According to the pressure sensor and the pressure sensing system, the pressure sensor comprises the fabric pressure-sensitive layer, the conductive layer and the isolation layer, and the fabric pressure-sensitive layer is used for changing the physical parameters of the fabric pressure-sensitive layer when detecting the pressure; the conductive layer is provided with a plurality of groups of conductive channels, the plurality of groups of conductive channels are respectively arranged along a first direction, each group of conductive channels comprises an input channel and an output channel, the input channel and the output channel are arranged at intervals, the input channel is used for receiving input electric signals, the output channel is used for sending output electric signals, and the output electric signals are obtained by the input electric signals passing through the fabric pressure-sensitive layer; the insulating layer sets up the fabric pressure-sensitive layer with between the conducting layer, the insulating layer includes a plurality of preset regions, and a plurality of preset regions set up with the electrically conductive passageway one-to-one of multiunit, preset regional conduct electrically conductive passageway with the contact area of fabric pressure-sensitive layer, because the electrically conductive passageway of multiunit on the conducting layer sets up along the first direction respectively, compares in the pressure sensor of matrix form, only needs to set up multiunit electrically conductive passageway toward one direction, need not also can realize the response of pressure through the crisscross line of walking of cross axle direction and axis of ordinates direction each other, has realized simplifying pressure sensor's the line of walking.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded schematic view of a pressure sensor according to one embodiment;
FIG. 2 is a schematic diagram of a conductive layer according to an embodiment;
FIG. 3 is a schematic structural diagram of an isolation layer according to an embodiment;
FIG. 4 is a schematic diagram of a pressure sensor according to an exemplary embodiment;
FIG. 5 is an equivalent diagram of a predetermined area according to an embodiment;
FIG. 6 is a schematic diagram illustrating an embodiment of a predefined area extending in a target direction;
FIG. 7 is a schematic view of another embodiment of a preset area extending in a target direction;
FIG. 8 is a schematic diagram of a pressure sensing system according to an exemplary embodiment;
fig. 9 is an equivalent schematic diagram of a pressure sensing system according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The embodiment of the invention provides a pressure sensor and a pressure sensing system, which can simplify wiring of the pressure sensor.
Referring to fig. 1, fig. 1 is an exploded view of a pressure sensor according to an embodiment. In one embodiment, as shown in FIG. 1, a pressure sensor is provided that includes a fabric pressure sensitive layer 110, a conductive layer 120, and an insulating layer 130. Wherein:
the fabric pressure sensitive layer 110 is adapted to change its physical parameter upon detection of the application of pressure. The conductive layer 120 serves to transmit an input electrical signal to the fabric pressure sensitive layer 110 and receive an output electrical signal output from the fabric pressure sensitive layer 110. The insulating layer 130 is disposed between the fabric pressure sensitive layer 110 and the conductive layer 120, and a portion of the insulating layer 130 insulates the fabric pressure sensitive layer 110 from the conductive layer 120 and a portion serves as a contact portion of the fabric pressure sensitive layer 110 and the conductive layer 120, thereby sensing pressure in a remaining partial area of the pressure sensor. Wherein, the contact part of the fabric pressure sensitive layer 110 and the conductive layer 120 in the isolation layer 130 serves as the part of the pressure sensor for sensing pressure.
Wherein, the fabric is a flat soft piece block formed by crossing, winding and connecting fine and flexible objects. The fabric pressure-sensitive layer 110 means that a pressure-sensitive device is woven inside the fabric to form a pressure-sensitive area of the fabric layer. The fabric pressure sensitive layer 110 of this embodiment changes its physical parameter upon detection of the application of pressure.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a conductive layer 120 according to an embodiment. In one embodiment, the conductive layer 120 is provided with a plurality of sets of conductive vias 121 as shown in fig. 2, wherein:
the plurality of sets of conductive channels 121 are respectively arranged along the first direction, each set of conductive channels 121 includes an input channel 1211 and an output channel 1212, the input channel 1211 and the output channel 1212 are arranged at intervals, the input channel 1211 is used for receiving an input electrical signal, the output channel 1212 is used for sending an output electrical signal, and the output electrical signal is obtained by passing the input electrical signal through the fabric pressure-sensitive layer 110.
In this embodiment, the conductive vias 121 are multiple sets, and the multiple sets of conductive vias 121 are all disposed along the same first direction, which can be understood as that the multiple sets of conductive vias 121 are parallel to the first direction. The input electrical signal and the output electrical signal of the present embodiment are the same type of electrical signal, and may be, for example, a current signal or a voltage signal, which is not limited herein.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an isolation layer 130 according to an embodiment. In one embodiment, as shown in fig. 3, the insulation layer 130 includes a plurality of predetermined regions 131, wherein:
the preset areas 131 are arranged in one-to-one correspondence with the multiple groups of conductive channels 121, and the preset areas 131 are used as contact areas of the conductive channels 121 and the fabric pressure-sensitive layer 110.
Herein, the insulating layer 130 is an intermediate layer insulating the fabric pressure-sensitive layer 110 and the conductive layer 120, and the insulating layer 130 maintains a partial area to sense pressure. The insulating layer 130 of the present embodiment includes a plurality of predetermined regions 131, and the predetermined regions 131 serve as contact regions of the conductive paths 121 and the fabric pressure-sensitive layer 110, that is, the predetermined regions 131 serve as portions of the pressure sensor for sensing whether pressure and/or pressure magnitude exists. Optionally, in the insulating layer 130, the fabric pressure sensitive layer 110 and the conductive layer 120 in the predetermined region 131 may be conductive, and other regions are insulating.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a pressure sensor according to an embodiment. In one embodiment, as shown in fig. 4, each set of input channels 1211 and output channels 1212 is connected to the fabric pressure-sensitive layer 110 in the preset region 131 of the insulating layer 130, so that each preset region 131 serves as a pressure sensing portion of the pressure sensor, an input electrical signal is input to the fabric pressure-sensitive layer 110 through the input channels 1211, the input electrical signal passes through the fabric pressure-sensitive layer 110 to obtain an output electrical signal, and the output electrical signal is output through the output channels 1212.
Specifically, since the preset region 131 in the insulating layer 130 serves as a contact region between the conductive path 121 and the fabric pressure-sensitive layer 110, the input path 1211 in the preset region 131, the fabric pressure-sensitive layer 110 in contact with the input path 1211, and the output path 1212 in contact with the fabric pressure-sensitive layer 110 form a loop, when no pressure is detected in the preset region 131 of the fabric pressure-sensitive layer 110, the physical parameter of the pressure-sensitive region in the preset region 131 is fixed, and the output electrical signal is also fixed. When the pressure-sensitive area in the preset area 131 is pressed, the physical parameter of the pressure-sensitive area in the preset area 131 changes, and it can be determined whether the preset area 131 receives the pressure pressing and the pressure according to the output electrical signal.
In the present embodiment, the pressure sensor comprises a fabric pressure sensitive layer 110, a conductive layer 120 and an insulating layer 130, the fabric pressure sensitive layer 110 is used for changing its physical parameter when detecting the pressure effect; the conductive layer 120 is provided with a plurality of groups of conductive channels 121, the plurality of groups of conductive channels 121 are respectively arranged along a first direction, each group of conductive channels 121 includes an input channel 1211 and an output channel 1212, the input channel 1211 and the output channel 1212 are arranged at intervals, the input channel 1211 is used for receiving an input electrical signal, the output channel 1212 is used for sending an output electrical signal, and the output electrical signal is obtained by passing the input electrical signal through the fabric pressure-sensitive layer 110; the insulating layer 130 is arranged between the fabric pressure-sensitive layer 110 and the conductive layer 120, the insulating layer 130 includes a plurality of preset regions 131, the plurality of preset regions 131 are arranged in one-to-one correspondence with the plurality of groups of conductive channels 121, the preset regions 131 serve as contact regions of the conductive channels 121 and the fabric pressure-sensitive layer 110, and since the plurality of groups of conductive channels 121 on the conductive layer 120 are respectively arranged along the first direction, compared with a matrix-type pressure sensor, only the plurality of groups of conductive channels 121 need to be arranged along one direction, and pressure sensing can be realized without the need of mutually staggered routing in the transverse axis direction and the longitudinal axis direction, thereby simplifying routing of the pressure sensor.
In one embodiment, the fabric pressure sensitive layer 110 is a fabric pressure sensitive layer and the physical parameter is a resistance value. The fabric pressure sensitive layer 110 changes the magnitude of the resistance value according to the magnitude of the pressure, thereby outputting different current signals through the output device. Specifically, the larger the pressure applied to the pressure sensor, the smaller the resistance value of the fabric pressure-sensitive layer 110, and the larger the output current signal, it can be determined whether the pressure sensor is pressed or the pressure applied according to the change of the current signal.
In one embodiment, conductive layer 120 includes multiple sets of conductive lines. Each set of conductive lines includes an input lead and an output lead. The input leads serve as the input channel 1211 and the output leads serve as the output channel 1212. In this embodiment, the conductive wire may be a pure metal wire, or a metal-plated fiber using nylon as a base material.
Referring to fig. 5, fig. 5 is an equivalent schematic diagram of a preset area 131 according to an embodiment. As shown in fig. 5, when the fabric pressure-sensitive layer 110 is a fabric pressure-sensitive layer, the variable resistance R1 is a variable resistance equivalent to the area of the fabric pressure-sensitive layer 110 contacted by the insulating layer 130 and the conductive layer 120, and when pressure is applied to the contact area, the larger the pressure, the lower the resistance of the fabric pressure-sensitive layer 110 is, so that the resistance between the input channel 1211 and the output channel 1212 in the contact area is reduced.
In one embodiment, the predetermined region 131 is optionally provided with openings exposing the corresponding input channels 1211 and the output channels 1212.
The open pore refers to a cavity and a pore channel which are communicated with the outside in the porous solid. In the present embodiment, the input channels 1211 and the output channels 1212 are exposed through the openings, so that the input channels 1211 and the output channels 1212 in the predetermined region 131 are connected to the fabric pressure-sensitive layer 110, thereby saving material.
It should be noted that the number of the openings in this embodiment may be one or more, and this embodiment is not particularly limited.
In one embodiment, the aperture comprises:
a first opening exposing the corresponding input channel 1211, the first opening serving as a contact area of the input channel 1211 and the fabric pressure-sensitive layer 110;
a second opening exposing the corresponding output channel 1212, the second opening serving as a contact area of the output channel 1212 and the fabric pressure sensitive layer 110.
In this embodiment, there is no overlap between the first and second apertures. Specifically, the first opening and the second opening respectively expose the input channel 1211 and the output channel 1212 in the set of conductive channels 121, the input channel 1211 is connected to the fabric pressure-sensitive layer 110 through the first opening, and the output channel 1212 is connected to the fabric pressure-sensitive layer 110 through the second opening, so that the input channel 1211 and the output channel 1212 in the set can be connected to the fabric pressure-sensitive layer 110.
In one embodiment, optionally, the aperture comprises:
a third opening exposing the input channel 1211, the output channel 1212 and the spaced area between the input channel 1211 and the output channel 1212, the third opening serving as a contact area of the conductive channel 121 and the fabric pressure sensitive layer 110.
The spacing region is a portion between the input channel 1211 and the output channel 1212 in the preset region 131. Specifically, a set of input channels 1211 and output channels 1212 are connected to the fabric pressure sensitive layer 110 through the third opening. In this embodiment, the input channels 1211, the output channels 1212 and the spacing regions are exposed by providing a third opening, so that the input channels 1211 and the output channels 1212 of one set of conductive channels 121 can be connected to the fabric pressure-sensitive layer 110.
In one embodiment, the preset region 131 is provided with a first conductive block corresponding to the input channel 1211, the first conductive block covering the corresponding input channel 1211, the first conductive block serving as a contact region of the input channel 1211 and the fabric pressure sensitive layer 110;
a second conductive block corresponding to the output channel 1212, the second conductive block covering the corresponding output channel 1212, the second conductive block serving as a contact area between the output channel 1212 and the fabric pressure sensitive layer 110;
wherein the first conductive block and the second conductive block do not overlap.
In this embodiment, the first conductive block and the second conductive block are both solid regions that can conduct electricity. Specifically, the input channels 1211 are connected to the fabric pressure-sensitive layer 110 through the first conductive blocks, and the output channels 1212 are connected to the fabric pressure-sensitive layer 110 through the second conductive blocks, so that the input channels 1211 and the output channels 1212 of one set of conductive channels 121 can be connected to the fabric pressure-sensitive layer 110.
Compared with the open-pore solution, in the present embodiment, by providing the first conductive block and the second conductive block, at least one of the input channel 1211 and the output channel 1212 is prevented from being suspended from the fabric pressure-sensitive layer 110 when the pressure is low or no pressure occurs.
In one embodiment, the distribution shape of the plurality of preset areas 131 corresponds to an object shape, which is the shape of the contact surface between the object to be recognized and the pressure sensor.
In the present embodiment, the length of the object to be recognized in one direction is greater than the length in the other perpendicular direction. For example, the object to be recognized in the present embodiment may be a palm, a sole, a lying human body, and the like, and is not limited herein. The target shape is a shape of a contact surface between the target to be recognized and the pressure sensor, for example, if the target to be recognized is a sole, the target shape is a shape of the sole.
In one embodiment, optionally, at least two of the plurality of preset regions 131 are disposed along the first direction, at least two of the plurality of preset regions 131 are disposed along a second direction, the second direction is perpendicular to the first direction, and the plurality of preset regions 131 extend along a target direction, the target direction is parallel or perpendicular to the first direction.
In this embodiment, the first direction and the second direction are perpendicular. For example, the first direction is a longitudinal direction, and the second direction is a transverse direction. The target direction refers to a direction parallel or perpendicular to the first direction. Specifically, the plurality of preset regions 131 extending in the target direction means that the number of preset regions 131 arranged in the target direction is greater than the number of preset regions arranged in a direction perpendicular to the target direction.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating an embodiment of a preset region 131 extending along a target direction. In this embodiment, the target direction is parallel to the first direction. As shown in fig. 6, the first direction is a longitudinal direction, and the second direction is a transverse direction, and since the target direction is parallel to the first direction, the plurality of preset regions 131 extend in the longitudinal direction.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating another preset area 131 extending along a target direction according to an embodiment. In this embodiment, the target direction is perpendicular to the first direction. As shown in fig. 7, the first direction is a transverse direction, the second direction is a longitudinal direction, and the plurality of preset regions 131 extend in the longitudinal direction since the target direction is perpendicular to the first direction.
Specifically, as shown in fig. 6 and 7, the number of the preset regions provided in the target direction is 4, and the number of the preset regions arranged in the direction perpendicular to the target direction is 2.
It is understood that the spacing in fig. 6 and 7 is merely an example, and the spacing of the input channels 1211 and the output channels 1212 of the same set, as well as the spacing between different conductive channels 121, may be varied as desired.
In one embodiment, a pressure sensing system is provided, comprising a pressure sensor as described in any of the above embodiments.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a pressure sensing system according to an embodiment. In one embodiment, as shown in FIG. 8, a pressure sensing system includes a pressure sensor 100, a power supply circuit 200, and a sampling circuit.
The pressure sensor 100 of the present embodiment may refer to the description of any one of the above embodiments, which is not repeated herein. The power supply circuit 200 has a power supply terminal connected to the input channels 1211, and the power supply circuit 200 is configured to send an input electrical signal to each of the input channels 1211. The sampling end of the sampling circuit is connected to the output channels 1212, and the sampling circuit is configured to collect the output electrical signal sent by each output channel 1212.
Specifically, the power supply circuit 200 sends the input electrical signal to the fabric pressure-sensitive layer 110 in the preset area 131 through the input channel 1211, and the sampling circuit collects the output electrical signal through the output channel 1212. Thereby storing the output electric signal or recognizing the gesture of the target to be recognized by using the output electric signal.
It should be noted that the power supply circuit 200 is configured to send the input electrical signal to each input channel 1211, where the power supply circuit 200 may send the input electrical signal to each input channel 1211 at the same time, or send the input electrical signal to each input channel 1211 in a time-sharing manner, and this is not limited herein. Similarly, the sampling circuit collects the output electrical signals sent by each output channel 1212, may collect the output electrical signals sent by each output channel 1212 at the same time, or collects the output electrical signals sent by each output channel 1212 in a time-sharing manner, which is not limited herein.
Referring to fig. 9, fig. 9 is an equivalent schematic diagram of a pressure sensing system according to an embodiment. In one embodiment, as shown in fig. 9, the power supply circuit 200 and the sampling circuit are integrated on one master chip. The variable resistors R1, R2 and R3 are equivalent to a variable resistor of the fabric pressure-sensitive layer 110 in the area where the insulating layer 130 and the conductive layer 120 are in contact, and when pressure is applied to the contact area, the greater the pressure, the lower the resistance of the fabric pressure-sensitive layer 110, and thus the resistance of the variable resistor in the contact area. The power supply circuit 200 sends input electric signals to variable resistors R1, R2 and R3 through an input channel 1211, wherein the resistors R4, R5 and R6 respectively pull down sampling resistors, one ends of the resistors R4, R5 and R6 are connected with a sampling circuit, the other ends of the resistors R4, R5 and R6 are connected with GND ground, the sampling circuit samples an output channel 1212, and a change value is converted into a digital signal for calculation, analysis, transmission and storage.
In one embodiment, the pressure sensing system optionally further comprises an input device and an output device. Wherein the input device is connected to the power supply circuit 200 and an input channel 1211, respectively, for transmitting an input electrical signal provided by the power supply circuit 200 to the input channel 1211. The output devices are respectively connected with the sampling circuit and the output channel 1212, and the output devices are used for transmitting the output electric signals sent by the output channel 1212 to the sampling circuit.
Optionally, the input device and said output device are integrated on one device. The input device and the output device of the present embodiment may be implemented by one FPC (Printed Circuit).
The pressure sensor and the pressure sensing system can be applied to scenes such as scenes which are too long in one direction (for example, long in the longitudinal direction) and scenes which cannot collect transverse lines, such as scenes with small space or unstable environments such as the inside of an insole.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A pressure sensor, comprising:
a fabric pressure sensitive layer for changing its own physical parameter upon detection of the effect of pressure;
the conductive layer is provided with a plurality of groups of conductive channels, the plurality of groups of conductive channels are respectively arranged along a first direction, each group of conductive channels comprises an input channel and an output channel, the input channel and the output channel are arranged at intervals, the input channel is used for receiving input electric signals, the output channel is used for sending output electric signals, and the output electric signals are obtained by the input electric signals passing through the fabric pressure-sensitive layer;
the insulating layer is arranged between the fabric pressure-sensitive layer and the conducting layer and comprises a plurality of preset regions, the preset regions are arranged in one-to-one correspondence with a plurality of groups of conducting channels, the preset regions are used as contact regions of the conducting channels and the fabric pressure-sensitive layer, and the area of the preset regions is larger than the area enclosed by the conducting channels in the preset regions;
the distribution shapes of the multiple preset areas correspond to the shapes of targets, and the shapes of the targets are the shapes of contact surfaces of the targets to be recognized and the pressure sensors;
the preset area is provided with a first conductive block, the first conductive block corresponds to the input channel, the corresponding input channel is covered by the first conductive block, and the first conductive block is used as a contact area of the input channel and the fabric pressure-sensitive layer;
the second conductive blocks correspond to the output channels, cover the corresponding output channels, and serve as contact areas of the output channels and the fabric pressure-sensitive layer;
wherein the first conductive block and the second conductive block do not overlap; in the absence of pressure, the input channel is in contact with the textile pressure sensitive layer through the first conductive block, and the output channel is in contact with the textile pressure sensitive layer through the second conductive block.
2. The pressure sensor of claim 1, wherein the conductive layer comprises:
a plurality of sets of conductive lines, the conductive lines including input conductive lines and output conductive lines, the input conductive lines serving as the input channels and the output conductive lines serving as the output channels.
3. The pressure sensor of claim 1, wherein the fabric pressure sensitive layer is a fabric piezoresistive layer and the physical parameter is a resistance value.
4. A pressure sensor according to claim 1, wherein the predetermined area is provided with an opening exposing the corresponding input channel and output channel.
5. The pressure sensor of claim 4, wherein the aperture comprises:
a first aperture exposing the corresponding input channel, the first aperture serving as a contact area of the input channel and the fabric pressure sensitive layer;
second openings exposing the corresponding output channels, the second openings serving as contact areas of the output channels and the fabric pressure sensitive layer.
6. The pressure sensor of claim 4, wherein the aperture comprises:
a third opening exposing the input channel, the output channel, and a spaced area between the input channel and the output channel, the third opening serving as a contact area between the conductive channel and the fabric pressure sensitive layer.
7. The pressure sensor according to any one of claims 1 to 6, wherein at least two of the plurality of preset regions are arranged in the first direction, at least two of the plurality of preset regions are arranged in a second direction, the second direction being perpendicular to the first direction, and the plurality of preset regions extend in a target direction, the target direction being parallel or perpendicular to the first direction.
8. A pressure sensing system comprising a pressure sensor according to any of claims 1-7.
9. The pressure sensing system of claim 8, further comprising:
the power supply circuit is used for sending input electric signals to each input channel;
and the sampling end of the sampling circuit is connected with the output channels, and the sampling circuit is used for acquiring the output electric signals sent by each output channel.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3171146A1 (en) * | 2015-11-17 | 2017-05-24 | Eidgenössische Materialprüfungs- und Forschungsanstalt EMPA | Sandwich-like pressure sensitive sensor array |
| CN108896214A (en) * | 2017-05-03 | 2018-11-27 | 皮尔茨公司 | Multilayer touch sensor |
| CN110108394A (en) * | 2019-05-20 | 2019-08-09 | 中国科学院重庆绿色智能技术研究院 | Large area array separate type pressure sensor and preparation method thereof, waterborne conductive slurry and preparation method thereof |
| CN110132461A (en) * | 2019-04-19 | 2019-08-16 | 浙江大学 | A Replaceable Flexible Sensing Device Based on Porous Structure |
| CN213022056U (en) * | 2020-08-07 | 2021-04-20 | 棉联（北京）网络科技有限公司 | Pressure sensor, pressure sensing system and fabric piece |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9271665B2 (en) * | 2011-05-20 | 2016-03-01 | The Regents Of The University Of California | Fabric-based pressure sensor arrays and methods for data analysis |
| US10561581B2 (en) * | 2017-11-27 | 2020-02-18 | Aam Care, Inc. | Object detecting device using multi-touch pressure-sensing |
-
2021
- 2021-04-25 CN CN202110446765.8A patent/CN113091965B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3171146A1 (en) * | 2015-11-17 | 2017-05-24 | Eidgenössische Materialprüfungs- und Forschungsanstalt EMPA | Sandwich-like pressure sensitive sensor array |
| CN108896214A (en) * | 2017-05-03 | 2018-11-27 | 皮尔茨公司 | Multilayer touch sensor |
| CN110132461A (en) * | 2019-04-19 | 2019-08-16 | 浙江大学 | A Replaceable Flexible Sensing Device Based on Porous Structure |
| CN110108394A (en) * | 2019-05-20 | 2019-08-09 | 中国科学院重庆绿色智能技术研究院 | Large area array separate type pressure sensor and preparation method thereof, waterborne conductive slurry and preparation method thereof |
| CN213022056U (en) * | 2020-08-07 | 2021-04-20 | 棉联（北京）网络科技有限公司 | Pressure sensor, pressure sensing system and fabric piece |
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