KR101655936B1 - System for confirming position data of underground construction - Google Patents

Abstract

The present invention relates to a system for managing an underground construction and position data thereof and, more specifically, relates to a system for managing an underground construction and position data thereof, wherein when measuring a position of an underground construction with electromagnetic measurement equipment, position data management of the underground construction can be accurately maintained by comparing surveyed data and basic information held by a marker by utilizing the marker which holds the basic information on the underground construction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for managing underground facilities and their location data,

The present invention relates to an underground facility and a system for managing the location data of the underground facility. More particularly, the present invention relates to an underground facility, The present invention relates to an underground facility and a system for managing the location data of the underground facility so that the actual data and the basic information held by the marker can be compared with each other by using the marker including the marker.

Recently, as the city has become more advanced and functional, the underground has become more utilized than ever.

However, underground facilities such as water, sewerage, power, communication, and gas buried so far have become inaccurate in its location and depth, and are becoming obstacles to efficient management due to diversified and controlled management subjects.

Therefore, in order to prevent and manage safety accidents caused by underground facilities, underground surveying and surveying equipment should perform precise survey of underground facilities at national level and further establishment of geographic information system (GIS) Is a technology field that aims to realize a safe, secure and safe society.

In general, surveying measures the location of certain points on the surface, underground, underwater, and space, displays the results in figures and figures, calculates distances and heights, areas, volumes and displacements, .

Surveys also include mapping, coastal surveying, surveying, and so on. In other words, surveying is a study to analyze the mutual positional relationship between the points existing in the earth and outer space and natural phenomena such as earth surface, underground, underwater, ocean, space and space, And the like.

Furthermore, the surveying is to numerically identify the length, angle, direction, and the like, determine the horizontal position and the vertical position by the combination of the distance and the angle considering the plane and the curved surface and the space, Quantitative interpretation that expresses in three dimensions together. And interpretation and processing of terrain information about environment and resources.

In this way, the survey will lead to processes such as object survey, observation, interpretation, planning and design, and evaluation and maintenance.

Due to continuous improvement of economic, social, cultural and industrial level, various underground facilities buried in numerous institutions such as national, local government, electric company, water resources corporation, gas corporation, telecommunication company, district heating corporation, Underground space is located in a subterranean space (mostly within 3m below ground level) like a spider web.

However, as a result of failing to grasp the precise location of underground facilities, the degree of damage caused by various incidents during construction has increased significantly compared with the past.

Underground facilities are not only social infrastructures but also information infrastructure societies. Therefore, various accidents and disasters related to underground facilities have more serious effects than economic damages of the people as well as physical and physical damages directly.

Therefore, underground facilities are closely related to the safety of the city, and systematic and scientific underground facilities need to be managed for a safe and pleasant city (u-CITY).

However, the reality is that the performance of the research and development investment and the government's support for the location confirmation of the underground facilities such as the Ministry of Construction and Transportation and the Ministry of Information and Communication and the GIS are far below those of advanced countries. One of these causes is that it is not constructed as it has been thoroughly organized from the burial stage to the confirmation of the underground facilities, and the limitations and limitations of the present technology of the underground exploration and surveying to confirm the buried underground facilities .

In addition, in order to realize the Urban Information System (UIS) and the intelligent terrestrial information system, it is very necessary to locate the high-resolution, long-depth 3D underground facilities by exploration and surveying technology.

Conventional exploration and surveying techniques for exploration and surveying of underground facilities include electromagnetic induction method (induction method).

According to the electromagnetic field rule (Maxwell's law), a magnetic field is formed around a conductor when an electric current flows through the conductor. An object through which electric current passes forms a concentric magnetic field. The size of the magnetic field depends on the intensity and distance . Therefore, the electromagnetic induction method amplifies the concentric magnetic field by the receiver and constructs it so that its size appears on the sound or indicator. The electromagnetic induction method is very useful as a method to measure the position and depth of buried pipelines and cables. It has a disadvantage that non-metallic pipe can not be detected. However, the probe can be partially used as a non- Because it is also possible to detect.

Plane position measurement and burial depth measurement are performed by electromagnetic induction method. Peak method and null method are used for plane position measurement.

At this time, when the receiver is moved horizontally with respect to the conductor through which the current flows, the magnetic line of force proceeds along the direction of the coil, so that a maximum signal (Peak Signal) is generated on the conductor. So that the magnetic line becomes smaller and the signal is reduced. That is, at the right angle to the closest of the buried conductors and in the correct arrangement, the current exhibits the highest response.

And, the least law is used to measure the approximate location of the underground facility (the highest point of the magnetic field strength) by looking at the receiver near the "0" value. That is, when the receiver of the vertical antenna is vertically moved with respect to the buried object, the magnetic force line running in the axial direction of the coil is minimized, and a null signal is generated on the facility . In this way, it is possible to identify the location of the facility by the difference between the strong signal at both ends of the facility and the weak signal on the facility.

The depth of buried depth is measured by using a double aerial (Twin Aerial Antenna) in which two horizontal antennas are spaced apart from each other by a predetermined distance (for example, 400 mm) Exploration.

For example, as shown in Fig. 1, when a current (I) flowing through a conductor is measured using a receiver provided with an upper horizontal antenna (t) and a lower horizontal antenna (b) The reactivity of the horizontal antenna (t) and the reactivity of the lower horizontal antenna (b) are expressed by the following equations (1) and (2), respectively.

Equation 1

Equation 2

In the equations (1) and (2), Et denotes the degree of reactivity in the upper horizontal antenna, Eb denotes the reactivity in the lower horizontal antenna, I denotes the intensity of the current flowing in the conductor, Represents the distance between the horizontal antennas, and d represents the depth from the lower horizontal antenna to the conductor.

And the reactivity (Eb) in the lower horizontal antenna (b) is subtracted from the reactivity (Eb) in the upper horizontal antenna (t), the following equation (3) is obtained.

Equation 3

Equation (1) can be expressed by the following Equation (4) by summarizing Equation (1) with respect to the current (I) flowing in the conductor.

Equation 4

Accordingly, the depth d from the lower horizontal antenna b to the conductor (underground facility) can be expressed by the following equation (5).

Equation 5

In the electromagnetic disturbance area, the depth of burial is obtained by using trigonometry.

As described above, in the electromagnetic induction method, an AC magnetic field is generated around an underground facility, such as a pipe or a cable, and an AC magnetic field is generated around the AC magnetic field. The AC magnetic field generated from the ground surface is measured using the directional sensitivity of the measurement coil of the receiver. Lt; / RTI > for the potential gradient. The soil that passes the current changes locally, and the wet soil is a much better conductor than the dry sand.

In the conventional electromagnetic induction method as described above, it is possible to perform measurement only at the upper portion of the underground facility, and there is a limitation that the result of the survey is one-dimensional information that an underground facility exists at a few meters (depth) have.

In other words, in the case of exploring an underground facility where the exact location is not known, it is necessary to obtain precise information about the plane position of the underground facility by performing a precise survey on the entire suspected area. Based on this, It is possible to carry out the measurement for.

Therefore, there is a problem that the exploration time for acquiring accurate information about the planar position of the underground facilities is very long.

In particular, it is not possible to exclude the possibility that the location of an underground facility may not be found when the location of the underground facility is erroneously determined and the exploration is performed to a certain distance.

Korean Patent Publication No. 10-2011-0058313 (2011-06-01), 'Three-dimensional electromagnetic induction surveying equipment for underground facilities'

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a method of measuring a position of an underground facility using an electromagnetic induction measuring instrument, And to provide a system for managing underground facilities and location data of the underground facilities so as to more accurately maintain the location data management of underground facilities by comparing actual data and basic information held by the markers.

The present invention provides a means for achieving the above object, which comprises a transmitter 10 for transmitting an alternating current to an underground facility 2 to be surveyed, And a receiver 20 for receiving the induced magnetic field and detecting the buried position and depth, wherein the receiver 20 is configured in a shape selected from a triangular prism shape, a right triangular prism shape, a cylindrical shape, a cylindrical shape, and a spherical shape A pair of upper receiving antennas 22 and a lower receiving antenna 24, which are positioned in parallel with each other at a predetermined interval, are installed in each of three surfaces, which are equally divided into three by 360 degrees in plan view; A support bar 30 positioned vertically with respect to the ground and on which the transmitter 10 and the receiver 20 are installed, a handle 40 positioned horizontally on the ground and connected to the upper end of the support bar 30, A control unit 50 for processing signals received from the lower receiving antenna 24 and the upper receiving antenna 22, a display unit 58 connected to the control unit 50 and displaying the input conditions and processed results, A keypad unit 56 for inputting a value to be set in the control unit 50 and a speaker unit 59 for generating a signal tone indicating whether the transmitter 10 is operated according to a control signal of the control unit 50, And a port unit (57) having a serial port and a USB port for connecting the control unit (50) and an external computer, the system comprising:

The control unit 50 is capable of performing short-range wireless communication with a GPS receiver GP1 for receiving the current coordinates of the controller 50 and a marker communication unit WP2 for the marker MK having the information of the underground facility 2 Further comprising a wireless communication unit (WP1);

The marker MK includes a marker housing 310 and a marker base (MKB) on which the marker housing 310 is inserted and removed. The marker housing 310 is formed in a cylindrical shape with an open top, and an open upper surface of the marker housing 310 is closed by a cover body 320 so as to be openable and closable; A battery 330 and a control box 340 are installed in the marker housing 310; A rectangular protrusion 350 protruding downward is provided at the center of the lower surface of the marker housing 310; A housing connection terminal 352 is provided on the lower end surface of the fixing protrusion 350 so as to protrude in the form of a dome switch; A GPS antenna GP2 and a marker communication unit WP2 capable of wireless communication are installed on the upper surface of the cover body 320;

The arcade marker base (MKB) is formed in a quadrangular plate shape which is buried so as to be exposed only on the surface of the upper surface of the underground facilities (2), and a square groove in which the fixing protrusions (350) A dome-shaped base terminal 412 connected to the housing connection terminal 352 is provided on the bottom surface of the rectangular fixing member 410, and the base terminal 412 is provided on the bottom surface of the square fixing member 410, The controller 414 includes information on the type, depth, coordinates, and date of landfill of the buried underground facility 2, and the controller 414, A system for managing location data is provided.

According to the present invention, when measuring the position of an underground facility by using an electromagnetic induction measurement equipment, the actual information and the basic information possessed by the marker are compared using a marker including basic information about the underground facility, Location data management can be maintained more accurately.

Fig. 1 is a conceptual diagram for explaining a situation in which the depth of an electromagnetic induction probe is measured.
2 is a block diagram illustrating an embodiment of a system for managing underground facilities and location data according to the present invention.
3 is a perspective view conceptually illustrating a receiver in an embodiment of a system for managing underground facilities and location data according to the present invention.
4 is a perspective view illustrating an embodiment of a system for managing underground facilities and location data according to the present invention.
5 is a conceptual diagram illustrating a state of exploring an underground facility and a screen of a display unit using an embodiment of a system for managing underground facilities and location data according to the present invention.
Figure 6 is an illustration of marker and marker bases applied to the system according to the present invention.
And
7 is an exemplary sectional view showing a modified example of the marker according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

The present invention uses the above-described prior-art patent publication No. 2011-0058313 as it is. Therefore, the features of the device configuration described below are all described in the Published Patent Application No. 2011-0058313.

2 and 3, a system for managing an underground facility and its location data according to the present invention includes a transmitter 10 for transmitting an AC current to an underground facility to be surveyed, And a receiver (20) for receiving the induced magnetic field generated in the underground facility by the propagated AC current and searching the buried position and depth.

The transmitter 10 can be configured to be able to select and perform an indirect probe method (direct method), a direct connection method, or the like depending on the material of the underground facility.

In the indirect method, the transmitter 10 is configured as guidance antennas so as to propagate an AC current at a predetermined frequency (for example, 50 Hz, 60 Hz, 1 KHz, 8 KHz, 33 KHz, 128 KHz, and the like).

In the direct connection method, a terminal connected to the transmitter 10 is grounded on the ground so that an AC current of a predetermined frequency (for example, 50 Hz, 60 Hz, 1 KHz, 8 KHz, 33 KHz, 128 KHz, etc.) is propagated.

Since the configuration of the transmitter 10 can be implemented by applying the configuration of a transmitter used in the conventional electromagnetic induction method, a detailed description will be omitted.

As shown in FIG. 3, the receiver 20 includes a pair of upper receiving antennas 22 and a lower receiving antenna 24, which are disposed in parallel at predetermined intervals, Respectively.

The upper receiving antenna 22 and the lower receiving antenna 24 are disposed in parallel to each other and are disposed horizontally with respect to the ground.

For example, the receiver 20 may be formed in a triangular prism shape or a regular triangular shape, or may be a cylindrical shape or a cylindrical shape.

As shown in FIG. 4, the three-dimensional electromagnetic induction measuring instrument for measuring underground facilities according to the present invention includes a support bar 30 vertically positioned on the ground, a handle 40 positioned horizontally on the ground, .

As shown in FIG. 4, the receiver 20 includes a lower receiving block 23 configured by disposing a lower receiving antenna 24 on three surfaces divided into three equal parts by 360 degrees in a plan view, And an upper receiving block 21 constituted by disposing an upper receiving antenna 22 on three surfaces divided into three.

The lower reception block 23 and the upper reception block 21 are fixedly installed at a predetermined interval (for example, 400 mm, 800 mm, 1 m) set on the support bar 30.

A lower reception block 23 is installed at the lower end of the support bar 30 and an upper reception block 21 is installed at a predetermined interval from the lower reception block 23.

The lower receiving block 23 and the upper receiving block 21 are disposed in such a manner that the lower receiving antenna 24 and the upper receiving antenna 22 are disposed on the same plane.

The lower receiving block 23 and the upper receiving block 21 may be formed into a spherical shape, a cylindrical shape, a cylindrical shape, a triangular columnar shape, a triangular cylindrical shape, a hexagonal columnar shape, a hexagonal cylindrical shape, or the like It is possible.

As shown in FIG. 4, a transmitter 10 including a pair of inductive antennas positioned at 180 degrees from each other is installed on the support bar 30 above the lower reception block 23. As shown in FIG.

It is also possible to apply a folding joint part 34 at an intermediate portion of the support bar 30 so that the support bar 30 can be folded as needed. Here, the foldable engaging portion 34 can be generally applied by a method widely used in mechanical structures (for example, a folding method using a hinge or a folding method using a hinge or the like) A detailed description thereof will be omitted.

The handle 40 is connected to the upper end of the support rod 30 at all times.

As shown in FIGS. 2 and 4, the three-dimensional electromagnetic induction measuring instrument for measuring underground facilities according to the present invention includes a signal receiving unit for receiving signals received from the lower receiving antenna 24 and the upper receiving antenna 22, A display unit 58 for displaying a condition and a processed result connected to the control unit 50 and a processed result and a display unit 58 for displaying the set input value and the frequency of the AC current propagated from the transmitter 10 It is also possible to provide a keypad unit 56 for inputting a character string or the like.

The control unit 50, the display unit 58, and the keypad unit 56 are installed and configured to be supported by the support bar 30 and the handle 40.

The knob 40 may be provided with a speaker unit 59 connected to the control unit 50 and generating a signal indicating whether the transmitter 10 is operating.

A port unit 57 including a serial port and a USB port is connected to the controller 50 so as to be connected to an external computer.

In addition, the controller 50 further connects the wireless communication unit WP1 and the GPS receiver GP1 according to the present invention.

The wireless communication unit WP1 is configured to be capable of short-range wireless communication with a marker communication unit WP2 (see FIG. 7) of a marker MK (see FIG. 7) to be described later.

The handle 40 may further include a battery unit 60 for supplying power to the controller 50 and the like.

With this configuration, it is very convenient to carry out the search of the underground facility while easily moving while holding the handle 40. [

FIG. 5 shows a process of exploring an underground facility 2 using the 3D electron induced measurement equipment for underground facility survey according to the present invention.

For example, in a case where the receiver 20 is located at the position directly above the underground facility 2 (in the case of the ㉯ position), it is indicated as being located at the center in the display unit 58, and when it is positioned biased to the left or right (In the case of the ㉮ or ㉰ position), it is indicated as being positioned at the center in the display unit 58.

3, each of the upper receiving antenna 22 and the lower receiving antenna 24 is positioned on three equally divided sides of the receiver 20, The signals obtained from the upper receiving antenna 22 and the lower receiving antenna 24 on the respective surfaces are different.

That is, the signal of one side is relatively larger than the signal of the other two sides, and it is interpreted that the underground facility 2 is located in a direction parallel to the direction showing a relatively large value.

It is possible to easily find the direct room position of the underground facility 2 by analyzing the size of the signal while ascertaining the direction parallel to the longitudinal direction of the underground facility 2 and moving it perpendicular to this direction. That is, since the size of the signal becomes relatively larger as it gets closer to the underground facility 2, it is possible to easily check the position of the underground facility 2 when moving in the direction of increasing the signal.

The control unit 50 analyzes the signals inputted from the three lower surface receiving antennas 24 and the upper surface receiving antennas 22 and determines the position of the underground facilities 2 in any direction As shown in Fig. 5, it can be displayed through the display unit 58. [0053] Fig.

According to the embodiment of the three-dimensional electromagnetic induction measuring instrument for measuring underground facilities according to the present invention, the signals of the lower receiving antenna 24 and the upper receiving antenna 22 obtained from three planes are analyzed, It is possible to easily find the arrangement direction and the position of the underground facilities 2. Therefore, it is possible to drastically reduce the time required for exploration.

In addition to the basic structure described above, the present invention is characterized in that, in addition to the above-described basic structure, specific information or basic information on the underground facilities (2), such as the type of underground facilities, depth of burial, date of burial, 6, the control unit 50 communicates with the marker MK via the marker MK and the marker base MKB to check the coordinate information (position information) accurately And can be used as basic information necessary for map production or as management information of the management system.

To this end, the marker MK includes a cylindrical marker housing 310 having an open inside and an open top.

In addition, a stepped surface (not shown) is formed on the upper end of the marker housing 310 by cutting the inner corner portion into a 'C' shape along the circumference, and the cover body 320 is stably seated on the stepped surface .

The method of fixing the cover body 320 to the marker housing 310 is configured to fix the plurality of magnets M1 and M2 embedded in the circumferential direction along the stepped surface with a suction force between the magnets M1 and M2. It is easy to open and close and easy to manage.

A battery 330 and a control box 340 are further provided on the inner bottom surface of the marker housing 310 and a fixing protrusion 350 protrudes downward at the center of the lower surface of the marker housing 310 And a housing connection terminal 352 protruding from the bottom surface of the fixing protrusion 350 in the form of a dome switch.

At this time, the housing connection terminal 352 is connected and controlled by the control box 340, and the driving current of the control box 340 is obtained through the battery 330.

A GPS antenna GP2 and a marker communication unit WP2 are installed on the top surface of the cover body 320 and are electrically connected to the control box 340. [

On the other hand, a square plate-shaped marker base (MKB) is buried in a state of being exposed only on the surface of the underground facility 2.

A rectangular fastener 410 having a rectangular groove protrudes at the center of the upper surface of the marker base MKB. A dome-shaped base terminal 412 is provided on the bottom surface of the rectangular fastener 410. 410 are inserted with the fixing protrusions 350 having a rectangular cross section.

The base terminal 412 is connected to a controller 414 incorporated in the marker base MKB. The controller 414 controls the type, depth, coordinates, embedding date, etc. of the embedded underground facility 10 The information is input from outside when the marker base (MKB) is installed, and is then mounted in a chip state when the controller 414 is configured.

The lower end surface of the marker base MKB is connected to the underground facility 2 by the waste prevention wire WW so that the underground facility 2 is prevented from being lost due to the crustal change. So that the user can securely obtain information about the user.

Thus, when the marker housing 310 is inserted into the marker base (MKB), the housing connection terminal 352 is connected to the base terminal 412, And information on the underground facilities 2 held by the marker base (MKB) is automatically transmitted to update the information on the marker housing 310. [

Therefore, even if the marker housing 310 is newly manufactured and newly installed, it is possible to automatically recognize accurate information on the underground facility 2 at the moment of installation, and to provide it when surveying.

In addition, the marker housing 310 itself receives and recognizes the coordinate information of the marker housing 310 via the GPS antenna GP2, and when the marker housing 310 is mounted on the marker base MKB, The control unit 340 compares the information of the GPS antenna 414 with the coordinate information received by the GPS antenna GP2 to determine whether there is a difference, and stores information about the difference in the control box 340 as information.

Thereafter, the control unit 50 controls the radio communication between the wireless communication unit WP1 and the marker communication unit WP2 according to the approach of the control unit 50, and controls the wireless communication between the wireless communication unit WP1 and the marker communication unit WP2, And the coordinate information received from the GPS receiver GP1 and the coordinate value transmitted from the marker communication unit WP2 are compared with each other to determine whether the difference is double or triple. This makes it possible to manage the information of the underground facility 2 which is very accurate.

In particular, when a position change occurs, it can be immediately checked and managed.

In addition, as shown in FIG. 7, the present invention can be configured to present the reference coordinates at the time of night aerial photographing to accurately provide the location information of the underground facilities, thereby increasing the efficiency and accuracy in the map production.

That is, the retracting motor 500 is installed in the marker housing 310 at a position not interfering with the battery 330 and the control box 340, and the motor shaft 510 of the retracting motor 500 is provided with the take- (520).

The winding motor 500 is driven by using the control box 340 and the battery 330 and the winding wire 530 is wound around the winding drum 520.

A wire hole 540 is formed in a part of the circumference of the marker housing 310 and one end of the winding wire 530 is exposed through the wire hole 540 to the outside of the marker housing 310.

A pair of support brackets 550 protruding from the left and right sides of the wire hole 540 are provided on the outer circumferential surface of the marker housing 310 with the wire hole 540 opened, The operation plate 560 is hingedly fixed to the hinge shaft 570 through the hinge shaft 570.

The upper end of the actuating plate 560 is rounded and a 'v' shaped groove 580 is formed at a center portion of a certain length from the upper end thereof. The end portion of the winding wire 530 is inserted and inserted The end of the winding wire 530 is bound to a part of the length of the plate 560.

A stopper 590 having a triangular cross section is fixed to the outer side of the upper marker housing 310 of the wire hole 540 so as to prevent rainwater from flowing therethrough while the operation plate 560 is raised, So that it is not stopped, that is, it is stopped to be fixed in a horizontal state.

When the operation plate 560 is set up in a horizontal state, an auxiliary battery (BTR) is built in a portion corresponding to the upper surface, and a lamp (LP) electrically connected to the auxiliary battery (BTR) To be displayed.

In particular, a switch SW for turning on / off the power of the auxiliary battery BTR is provided on an end surface of the outer side of the marker housing 310, which is a surface opposite to the lamp LP, When the pushing motor 500 is driven and the winding drum 520 is wound to set the operation plate 560 in a horizontal state, the pressed switch is restored and the power is supplied to the marker housing 310 And is a push-button switch for turning on the lamp (LP).

A coil spring SPR is provided between the upper end of the actuating plate 560 and the outer wall surface of the marker housing 310 to smooth the return of the actuating plate 560, A dolly (DRL) may be provided on the inner surface of the lower marker housing 310 for smooth operation of the winding wire 530.

10: transmitter 20: receiver
50: control unit 56: keypad unit
58: Display section 60: Battery section

Claims (1)

A transmitter 10 for transmitting an AC current to an underground facility 2 to be surveyed and an induced magnetic field generated in an underground facility 2 by an AC current propagated from the transmitter 10, Wherein the receiver comprises a pair of upper reception units arranged in parallel to each other at a predetermined interval, the receiver unit being configured in a shape selected from a triangular prism shape, a right triangular shape, a cylindrical shape, a cylindrical shape, The antenna 22 and the lower receiving antenna 24 are disposed on three surfaces of the antenna 3, which are equally divided into three by 360 ° in plan view; A support bar 30 positioned vertically with respect to the ground and on which the transmitter 10 and the receiver 20 are installed, a handle 40 positioned horizontally on the ground and connected to the upper end of the support bar 30, A control unit 50 for processing signals received from the lower receiving antenna 24 and the upper receiving antenna 22, a display unit 58 connected to the control unit 50 and displaying the input conditions and processed results, A keypad unit 56 for inputting a value to be set in the control unit 50 and a speaker unit 59 for generating a signal tone indicating whether the transmitter 10 is operated according to a control signal of the control unit 50, And a port unit (57) having a serial port and a USB port for connecting the control unit (50) and an external computer, the system comprising:
The control unit 50 is capable of performing short-range wireless communication with a GPS receiver GP1 for receiving the current coordinates of the controller 50 and a marker communication unit WP2 for the marker MK having the information of the underground facility 2 Further comprising a wireless communication unit (WP1);
The marker MK includes a marker housing 310 and a marker base (MKB) on which the marker housing 310 is inserted and removed. The marker housing 310 is formed in a cylindrical shape with an open top, and an open upper surface of the marker housing 310 is closed by a cover body 320 so as to be openable and closable; A battery 330 and a control box 340 are installed in the marker housing 310; A rectangular protrusion 350 protruding downward is provided at the center of the lower surface of the marker housing 310; A housing connection terminal 352 is provided on the lower end surface of the fixing protrusion 350 so as to protrude in the form of a dome switch; A GPS antenna GP2 and a marker communication unit WP2 capable of wireless communication are installed on the upper surface of the cover body 320;
The arcade marker base (MKB) is formed in a rectangular plate shape which is buried so as to be exposed only on the surface of the upper surface of the underground facilities (2), and a square groove in which the fixing protrusions (350) A dome-shaped base terminal 412 connected to the housing connection terminal 352 is provided on the bottom surface of the rectangular fixing member 410, and the base terminal 412 is provided on the bottom surface of the square fixing member 410, The controller 414 includes information on the type, depth, coordinates, and date of landfill of the buried underground facility 2, and the controller 414, A system for managing location data.

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