KR101783812B1 - Underground facility information providing device using RFID - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system for providing underground facility information using RFID, and more particularly, to a system for providing underground facility information using RFID (RFID) system that automatically acquires basic information about underground facilities using tags and combines them with location information acquired from the GPS to construct an accurate geographic information system .

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to an underground facility information providing system using RFID,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground facility information providing system using RFID (Radio Frequency Identification) in the field of underground facility surveying technology, and more particularly, RFID (Radio Frequency Identification) RFID (Radio Frequency Identification) system that can automatically acquire basic information about underground facilities using RFID tags including basic information and combine them with location information acquired from the GPS And an information providing system.

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 Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an RFID tag which includes basic information on underground facilities, (RFID) to provide basic information on underground facilities and to combine them with location information obtained from the GPS to build accurate geographic information systems. There is a main purpose.

A transmitter (10) for transmitting an AC current to an underground facility (UG) to be surveyed, and a controller (10) for controlling the operation of the underground facility 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 divided into three equal parts 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 includes a GPS receiver GP1 for receiving the current coordinates at which the control unit 50 is located and a wireless communication unit WP1 for wirelessly communicating information acquired by the control unit 50 to the integrated management server SV Further comprising;

The surface of the RFID tag 200 including the type of the underground facility UG, the depth of burial, the date of embedding, and the coordinate information is exposed on the upper surface of the underground facility UG;

A fixed bar 100 is installed on the outer circumferential surface of the connecting bush 34 to which the transmitter 10 is fixed so as not to interfere with the transmitter 10, And an antenna ANT connected to the GPS receiver GP1 and the wireless communication unit WP1 is installed on the upper surface of the support block 110. The support block 110 is provided with an upper fixture 122, The lower end of the lower end drawing board 126 is provided with an RFID reader 200 capable of reading the information of the RFID tag 200, An RFID module 130 is installed;

The support block 110 includes a main body 112 having an inner space and a cap 114 that is screwed onto the main body 112. A body tuck 116 is formed on an inner bottom surface of the main body 112 A through hole 118 is provided;

The multi-stage drawer 120 includes an upper jaw D1 hooked to the main body jaw 116 at an upper end thereof and an upper jaw D2 formed by a through hole PAS formed in the lower end of the upper jaw D1 And an intermediate drawer 124 formed to have the same shape as the upper holder 122 so as to be engaged with the upper holder 122 and a lower end having a T shape so as to be engaged with the intermediate drawer 124. [ And an outflow table 126. The underground facility information providing system using RFID is provided.

According to the present invention, when measuring the position of an underground facility using an electromagnetic induction measuring instrument, basic information on the underground facility is automatically acquired using an RFID tag including basic information on the underground facility, It is possible to obtain an effect to be utilized in building an accurate geographic information system in combination with the acquired location information.

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 showing an embodiment of an underground facility information providing apparatus according to the present invention.
3 is a perspective view conceptually showing a receiver in an embodiment of an underground facility information providing apparatus according to the present invention.
4 is a perspective view showing an embodiment of an underground facility information providing apparatus 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 the underground facility information providing apparatus according to the present invention.
FIG. 6 is an exemplary view showing an embodiment of an RFID applied to an underground facility information providing apparatus according to the present invention.
FIG. 7 is an exemplary view showing an example when the apparatus of FIG. 6 is used.
Fig. 8 is an exemplary view showing a configuration of a multi-stage drawer constituting the apparatus of Fig. 6;

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, the apparatus for providing underground facility information 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 an induced magnetic field generated in an underground facility and exploring a buried position and a 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 apparatus for providing underground facility information according to the present invention includes a support rod 30 vertically positioned on the ground, and 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.

2 and 4, a controller 50 for processing a signal received from the lower receiving antenna 24 and the upper receiving antenna 22 is provided in an embodiment of the underground facility information providing apparatus according to the present invention, A display unit 58 for displaying input conditions and processed results connected to the control unit 50 and a display unit 58 for inputting a set input value and a frequency of an AC current propagated from the transmitter 10, It is also possible to provide the keypad unit 56.

It is preferable that the control unit 50, the display unit 58 and the keypad unit 56 are formed 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.

In addition, 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.

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

At this time, the wireless communication unit WP1 is a known configuration for providing a communication environment capable of accessing an integrated management server (SV, see FIG. 6) via short-range wireless communication or the Internet.

In addition, the GPS receiver GP1 confirms the current coordinates of the transceivers 10 and 20 constituting the apparatus according to the present invention and transmits them to the integrated management server SV together with the underground facilities (UG, see FIG. 7) In the construction of geographic information system, it is possible to obtain the efficiency of UIS construction as well as ease of management and convenience by including the information of underground facilities (UG) in the digital map.

In this case, it is preferable that the wireless communication unit WP1 and the GPS receiver GP1 are installed on the upper surface of the support block 110 as shown in FIG.

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 (UG) using the 3D electron induced measurement equipment for underground facilities survey according to the present invention.

For example, in a case where the receiver 20 is located at a position directly above the underground facility UG (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, the receiver 20 includes the upper receiving antenna 22 and the lower receiving antenna 24 on three equally divided surfaces. Therefore, the receiver 20 is located in a direction in which the underground facilities UG are located 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 (UG) is located in a direction parallel to the direction which is relatively large.

It is possible to easily locate the direct room position of the underground facility UG by analyzing the signal size while confirming the direction parallel to the longitudinal direction of the underground facility UG as described above and then moving perpendicular to the direction. That is, since the size of a signal becomes relatively larger as it approaches the underground facility UG, it is possible to easily check the position of the underground facility UG when the signal moves in a 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 facility UG 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 UG. Therefore, it is possible to drastically reduce the time required for exploration.

6 and 7, in addition to the basic structure described above, specific information or basic information about an underground facility UG, such as the type of underground facility, depth of burial, date of burial, location information Information), and the like.

In this case, RFID (Radio Frequency Identification) stores information in an RFID tag that does not require a battery, and receives wireless power and radio signals from a reader or the like, and also transmits information wirelessly. It is widely used throughout life, and is sometimes referred to as smart tag or smart label.

Preferably, the RFID tag 200 is formed in a plate shape having a predetermined size and is buried in an exposed surface on an underground facility UG.

On the other hand, the fixing bar 100 is installed on the outer circumferential surface of the connecting bush 34 of the support bar 32 so as not to interfere with the transmitter 10.

That is, the fixed bar 100 is disposed orthogonally to a rod (not shown) for fixing the transmitter 10, and a supporting block 110 is fixed to an end of the fixed bar 100.

Since the fixing bar 100 is installed on both sides of the outer circumferential surface of the connecting bush 34 in the radial direction, a total of two supporting blocks 110 are provided on the end of each fixing bar 100.

In addition, a GPS receiver GP1 is installed on the upper surface of one of the support blocks 110 and an antenna ANT connected to the wireless communication part WP1 is installed on the upper surface of the other support block 110. [

In addition, the support block 110 is provided with a multi-stage drawer 120. The multi-stage drawer 120 includes an upper fixing bar 122, an intermediate drawer 124, and a lower drawer 126 And an RFID module 130 is installed on the lower end surface of the lower end drawing board 126.

In this case, the RFID module 130 is an RFID reader capable of reading information of the RFID tag 200.

The reason for configuring the multi-stage drawer 120 is that there is a height difference between the lower end of the supporting block 110 and the lower receiving block 23, and when the RFID module is installed on the lower side of the supporting block 110 The interval between the RFID tag 200 installed on the ground and the lower receiving block 23 is always reduced and the tag information can not be read.

In order to solve this problem and to smoothly read the tag information, when the multistage drawer 120 is pulled out by eliminating the height difference from the lower receiving block 23, Since the RFID tag 130 maintains the same height as the lower end of the lower receiving block 23, it can communicate smoothly with the RFID tag 200 on the ground. In particular, since the two RFID modules 130 are provided, the detection failure rate is remarkably lowered.

Here, the configuration of the support block 110 and the multi-stage drawer 120 will be described in more detail with reference to FIG.

According to FIG. 8, the support block 110 is apparently a block, but in fact, it is a kind of rectangular box.

The support block 110 is composed of a main body 112 and a cap 114 which is screwed on the main body 112. The main body 112 is hollow and the main body rim 116 is formed on the inner bottom surface. And a through hole 118 formed therein.

Accordingly, the multistage drawer 120 is assembled in a manner that the multistage drawer 120 is fitted from the upper side to the lower side through the through hole 118, thereby providing the multistage drawing structure according to the present invention.

At this time, the multi-stage drawer 120 has an upper jaw D1 which is hooked to the main body jaw 116 at the upper end of the upper part, and a lower jaw D2 formed by a through hole (PAS) A middle take-off table 124 formed in the same shape as the upper take-up table 122 so as to be engaged with the upper take-up table 122 and a 'T' shape to be engaged with the intermediate take- And a lower end drawing base 126 having a lower end.

The support plate 140 having the RFID module 130 integrally formed at the center of the lower end protrudes from the center of the support plate 140, And the fixing protrusion 142 is fixed in a screwed state.

Particularly, the portion where the fixing protrusion 142 is screwed is formed in the shape of a hole, not a groove, but in the form of a screw hole (SH) passing through the center of the lower end take- And the power source is supplied from the battery unit 60 in accordance with the control signal of the control unit 50. In this case,

A push button switch 150 is provided at one side of the lower end surface of the upper fixing table 122. The push button switch 150 is a well known switch that presses the button 152 by a built- Is protruded by the elastic force of the spring to the left in the figure and is pushed to the opposite side and is fixed while being protruded to the opposite side.

Thus, when the lower draw bar 126 is pushed up, it is completely pushed into the upper holding bar 122 while being pushed up with the intermediate draw bar 124 in order. At this time, the flow rod 154 is pushed, The lower end of the lower end drawer 126 is caught by the end of the flow rod 154 and is fixed without being drawn out in the downward direction.

When the user presses the button 152 to move the flow rod 154 to the opposite side, the lock state is released. Therefore, the lower drawer base 126 and the middle drawer base 124 are lowered by their own weights, do.

At this time, a space should be formed between the upper end of the upper fixing table 122 and the lower end of the cap 114, which is the inside of the main body 112. Thus, the intermediate draw-out belt 124 and the lower draw-out stand 126 can be easily accommodated and can be locked with the flow rod 154. [

In addition, the main body 112, the cap 114, and the upper fixing table 122, the middle draw-out table 124, the lower draw-out table 126, and the support plate 140 can prevent foreign matter adhesion, For molding and electromagnetic shielding, it is molded into the following molding composition.

The molding composition is composed of a mixture of 70% by weight of polyethylene resin and 30% by weight of silica, wherein 4 parts by weight of particulate graphite having a particle size of 30 탆, 100 parts by weight of monoenoalkoxytitanium 2 parts by weight of alumina powder having a particle size of 1 to 2 mu m, 2 parts by weight of CZ (N-cyclohexybenzothiazole-2-sulfenamide), 3 parts by weight of montmorillonite, 7 parts by weight of Ds (dichlorodimethylsilane) 3 parts by weight of calcium stearate, 4 parts by weight of ethylene glycol monomethyl ether, 5 parts by weight of Polysorbate 80, 5 parts by weight of sodium silicates, 5 parts by weight of sodium erosorbate, 3 parts by weight of salicylic acid ester 3 unit, terbium, 2 parts by weight of bauxite having a particle size of the clinker 0.1-0.2㎛ powder 5 parts by weight, the γ- aminopropyl triethoxysilane, 2 parts by weight of an aromatic polyamine, 2 parts by weight of sodium (Na ₂ O) 1 wt oxide , Silicon dioxide (SiO _{2) 2} parts by weight, and iron sesquioxide (Fe ₂ O ₃₎ comprises one part by weight, 2 parts by weight of alkylene amide.

At this time, the polyester resin is a base resin, and the particulate graphite having a particle size of 30 mu m is added for shielding electromagnetic waves, and mononeoalkoxy titanate forms electromagnetic transfer circuit without blooming phenomenon, Is added to obtain antistatic performance regardless of the thickness of the film.

Polylactic acid is a synthetic polymer type resin having excellent moisture resistance and processability. The polylactic acid has a melting temperature of 150-200 占 폚 and has properties of improving softness, tensile strength and elongation by ductility.

And, alumina is a compound of aluminum and oxygen and added for improving durability.

In addition, CZ (N-cyclohexybenzothiazole-2-sulfenamide) is added to increase surface slip property and to maximize prevention of foreign matter adhesion.

In addition, montmorillonite is added as an inorganic filler to increase mechanical properties, and Ds (Dichlorodimethylsilane) is added as a strong hydrophobic substance to maximize moisture resistance.

And, calcium stearate is added as a dispersant to promote the lubricating function and induce homogeneous dispersibility of the additives.

In addition, ethylene glycol monomethyl ether is added to enhance the adhesiveness, and it is added to increase the durability by strengthening the adhesion force.

In addition, Polysorbate 80 (Polysorbate 80) is one of the nonionic surfactants derived from sorbitol, which is added to prevent moisture from spreading. Sodium silicates are added to enhance the surface adhesion and enhance the cohesiveness. And sodium erosorbate is added to prevent oxidation.

In addition, the salicylic acid ester has a function of absorbing ultraviolet rays to prevent the resin from being deformed by ultraviolet rays.

In addition, terbium is a rare earth metal belonging to lanthanum family, and it has a good ductility and ductility, which contributes to improvement of buffering and wear resistance of the coating layer.

In addition, a bauxite clinker powder having a particle size of 0.1-0.2 mu m is added to increase the binding force to increase the compressive strength.

The? -Aminopropyltriethoxysilane is added as a silane coupling agent for coupling between a thermosetting resin such as a melamine resin and an inorganic material in order to increase the bonding property, the adhesion property, and the surface strength.

In addition, the aromatic polyamines are intended to promote curing.

In addition, the sodium oxide performs a function of enhancing the refractivity by reacting with silicon dioxide to form a silicate. Particularly, sodium oxide also functions as an antioxidant. Silicon dioxide is added through a vitrification reaction to form a chain lattice, do.

Therefore, it is preferable that the above-mentioned sodium oxide and silicon dioxide are mixed in a weight ratio of 1: 2.

The iron diiron trioxide is mainly used for anti-corrosive function, but it is added in order to suppress interfacial separation in the present invention, and it should be added in a small amount due to the characteristic of iron oxide.

In addition, the alkylene amide is added to maintain lubricity and stability, and is added in order to smoothly mix and prevent crushing after mixing.

In order to confirm the foreign matter resistance and moisture resistance according to these compositions, a coating solution was applied on the surface of a steel plate having a size of 10 cm × 5 cm × 0.5 cm, and then water was sprayed on the surface, and it was confirmed that water flowed down when the steel plate was raised up to 90 ° Respectively. As a result of the experiment, it was confirmed that the water flowed down after 15 degrees and the humidity was excellent. This means that the foreign matter resistance is high, and it is confirmed that there is electromagnetic wave shielding ability as well as antistatic property. In particular, regarding the shielding of electromagnetic waves, noise is minimized when information of the RFID tag 200 is read.

Accordingly, in order to detect the underground facilities (UG), the multi-stage drawing board 120 is drawn out when the lower receiving block 23 is swept over the ground.

The RFID module 130 installed on the lower side of the lower drawer 126 of the multi-stage drawer 120 communicates with the RFID tag 200 installed on the ground to acquire information about the underground facility UG.

At the same time, the receiver 20 detects the position of the underground facility UG, and the position information (coordinate information) at the detected point is transmitted from the GPS receiver GP1, ), The depth of landfill, the date of disposal, and the location information are collected and transmitted to the integrated management server (SV) (refer to FIG. 6) to be used as accurate numerical data in building a geographic information system.

Therefore, accurate management of underground facilities (UG) becomes possible.

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

Claims (1)

(10) for transmitting an AC current to an underground facility (UG) to be surveyed, and an induced magnetic field generated in an underground facility (UG) by an AC current transmitted from the transmitter (10) The receiver 20 includes a pair of upper portions 20a, 20b, 20c, 20c, 20m, 20m, 20m, 20m, 20m, 20m, 20m, 20m, 20m, The receiving antenna 22 and the lower receiving antenna 24 are disposed on three surfaces of the triangle divided 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 includes a GPS receiver GP1 for receiving the current coordinates at which the control unit 50 is located and a wireless communication unit WP1 for wirelessly communicating information acquired by the control unit 50 to the integrated management server SV Further comprising;
The surface of the RFID tag 200 including the type of the underground facility UG, the depth of burial, the date of embedding, and the coordinate information is exposed on the upper surface of the underground facility UG;
A fixed bar 100 is installed on the outer circumferential surface of the connecting bush 34 to which the transmitter 10 is fixed so as not to interfere with the transmitter 10, And an antenna ANT connected to the GPS receiver GP1 and the wireless communication unit WP1 is installed on the upper surface of the support block 110. The support block 110 is provided with an upper fixture 122, The lower end of the lower end drawing board 126 is provided with an RFID reader 200 capable of reading the information of the RFID tag 200, An RFID module 130 is installed;
The support block 110 includes a main body 112 having an inner space and a cap 114 that is screwed onto the main body 112. A body tuck 116 is formed on an inner bottom surface of the main body 112 A through hole 118 is provided;
The multi-stage drawer 120 includes an upper jaw D1 hooked to the main body jaw 116 at an upper end thereof and an upper jaw D2 formed by a through hole PAS formed in the lower end of the upper jaw D1 And an intermediate drawer 124 formed to have the same shape as the upper holder 122 so as to be engaged with the upper holder 122 and a lower end having a T shape so as to be engaged with the intermediate drawer 124. [ And an outgoing base (126). The underground facility information providing system using the RFID.

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