KR20140079674A - Magnet AND RFID - Google Patents

Magnet AND RFID Download PDF

Info

Publication number
KR20140079674A
KR20140079674A KR1020120148992A KR20120148992A KR20140079674A KR 20140079674 A KR20140079674 A KR 20140079674A KR 1020120148992 A KR1020120148992 A KR 1020120148992A KR 20120148992 A KR20120148992 A KR 20120148992A KR 20140079674 A KR20140079674 A KR 20140079674A
Authority
KR
South Korea
Prior art keywords
underground
buried
extension
rfid
reader
Prior art date
Application number
KR1020120148992A
Other languages
Korean (ko)
Inventor
김남수
안일규
박소현
Original Assignee
박두현
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 박두현 filed Critical 박두현
Priority to KR1020120148992A priority Critical patent/KR20140079674A/en
Publication of KR20140079674A publication Critical patent/KR20140079674A/en

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
    • G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
    • G06K7/10089—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision
    • G06K7/10099—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision the directional field being used for pinpointing the location of the record carrier, e.g. for finding or locating an RFID tag amongst a plurality of RFID tags, each RFID tag being associated with an object, e.g. for physically locating the RFID tagged object in a warehouse
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/08—Construction

Abstract

The present invention relates to an identifier device that identifies and identifies the location and information of underground objects. When an underground object is installed in the ground, Thereby providing a means for identifying the location.
Generally, there is a buried location system using a magnetic body or RFID as a typical system for locating and managing facilities buried in the ground.

Description

{Magnet AND RFID}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system or an identifier device for identifying, identifying and managing the location and information of underground facilities (underground facilities), and more particularly,

Seven underground utilities normally supplied to homes, such as water and sewage pipes, gas pipes, electric cables and telecommunication cables, are buried in the ground to prevent damage. However, roads with underground burials buried frequently due to various dogs and repair work are often excavated and opened. In addition, when installing new facilities or building structures, it is difficult to accurately grasp the location of existing facilities, so that time and material costs for construction are increased, and if existing facilities are damaged or destroyed during construction, Loss and safety of workers.

In order to improve this, systems have been devised for locating and managing buried facilities to prevent damage to cables and pipes buried in the construction, and the present invention relates to this.

In connection with the present invention, there is a system for locating a buried object using RFID, which is representative of systems for locating and managing facilities buried in the ground.

In this system, a passive RFID tag or an active RFID tag is placed at the top of the underground facilities, and after embedding, various information recorded in the RFID tag is received using an RFID reader to transmit a dedicated terminal, a smart phone, And displays and manages the facilities buried underground (underground objects).

Since the passive RFID tag uses the radio wave energy of the reader, there is no separate power source and it can be used forever. However, the recognition rate of the RFID tag and the RFID read period is short and the recognition rate becomes worse if there is an obstacle. Although the active RFID tag is equipped with the power supply means itself, the recognition distance and the recognition rate are good, but the life time of the underground buried material is about 30 years, and the lifetime of the power supply means is about 5 years.

As a solution to the above-mentioned problem, registered patent No. 1172944 (Aug. 03, 2012) is provided,

An RFID chip which is provided inside the body and communicates in an LF (Low Frequency) band; and an outer circumferential surface of the magnetic body, which is coupled with the RFID chip and wound by a coil length corresponding to an LF (Low Frequency) band of 125 KHz to 150 KHz band And the antenna of the RFID tag is coupled with the magnetic body to increase the recognition distance.

However, in the case of the above-mentioned No. 1172944, the recognition distance is widened by combining the antenna of the RFID tag and the magnetic body. However, it is difficult to extend the recognition distance substantially by itself, which limits the recognition rate recognized on the ground.

Especially, deep ground is buried or there is a strong obstacle, so ground wave recognition of radio wave and magnetic body may not be possible.

An object of the present invention is to provide a location identifier device capable of remarkably increasing the recognition rate of the RFID tag or the magnetic substance attached to the underground buried object even when the underground buried object is deeply embedded.

In order to achieve the above object, according to the present invention,

An RFID chip is fixed to an upper end of the RFID chip. The RFID chip includes a memory in which a size, a type, a depth of buried, a location, an installation date, An underground buried object identification device including a lower end and an RFID tag with a tag antenna coil wound around the RFID chip;

And an extension portion formed by stacking the extension posts in two or more stages is formed at the lower end portion. The extension posts have a cylindrical bar shape, and at the upper end thereof, a cylindrical bar shape having a smaller diameter than the upper end surface, And a lower end of which is fitted with a fitting receptacle recessed inwardly corresponding to the fitting portion so as to engage with a fitting portion of an extension post disposed on the fitting portion of an extending post disposed below, And the lower end of the extension post disposed at the bottom is fixedly attached to the underground item;

A reader for reading the RFID tag on the ground;

A GPS satellite for providing information about the location to the reader;

And a server computer for transmitting and receiving the information of the buried object and the reader.

The present invention is based on the fact that the detailed information is directly confirmed by a reader by using an antenna or a magnetic body of the RFID tag,

The recognition rate of the RFID tag or the magnetic body is increased and the transmission rate is high because the recognition distance from the ground is increased and the magnetic field recognition rate of the RFID tag or the magnetic body is increased and the influence of underground environment such as water and rocks is large. Therefore, the buried object can be efficiently managed.

FIG. 1A is a perspective view illustrating a subterranean basement ID device with a built-in RFID tag, in a partial cross-sectional view; B is a cross-sectional view showing a detailed configuration of a body (case) of an underground burial identifier device;
FIG. 2 A is a plan view showing the plan structure of the underground burial identifier device; FIG. B side sectional view showing a partial side sectional view;
Figure 3A is an example in which a magnetic field and an electric field are combined to form an electromagnetic field; B is a block diagram illustrating the concept of an RFID tag composed of an RFID chip and an antenna;
Fig. 4 is an overall diagram illustrating the concept of the overall structure of the underground burial management system
Fig. 5 is a perspective view of the extension post 710 as seen through a portion of the lower end A; Fig. B is an example of an embodiment in which an upper fitting portion is omitted; C is an example in which the bottom end receiving portion is omitted; An example in which an auxiliary extension post 710` formed with a receiving portion 730 at the lower end of the underground buried object identification device 300 is coupled and an attempt is made to join the insertion portion 720 of the extension post disposed below ;
6A is an example of a state in which the extension part is installed in a subterranean basement; B Another illustration; Another embodiment of a C extension post;

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

First, referring to the underground buried-matter identification device 300, in the view of FIG. 1A, FIG. 2A and FIG. 2B,

A body 310; A magnetic body 320; An RFID chip 330; An antenna (340), the body being waterproof and for use; Company Name; product no; And the magnetic material 320 is fixed to the inside of the intermediate portion, and buried in the underground.

The RFID tag is composed of an RFID chip 330 and an antenna 340. The RFID chip 330 has a unique number and is attached to the upper end or inside of the body. In addition, the RFID chip 330 includes a memory in which information of a buried object is stored in an encrypted form, and the size, type, burial depth, location information, installation date, responsible person information, and the like of the buried object are recorded.

Since the RFID chip 330 requires an active type requiring passive power and a passive type requiring no self power, and the underground buried material requires a lifetime of more than 30 years, a battery or an external power supply is required. Passive, which has limitations and can provide the information of the buried material through the RFID reader only when necessary, is desirable.

The RFID tag transmits the information of the memory built in the RFID chip 330 to the reader, and the communication frequency with the reader uses the LF band (125 KHz to 150 KHz). In order for the RFID tag to communicate with the reader through the LF frequency band, an antenna of a length corresponding to the LF frequency band is required.

The required antenna length is designed to be 2 wavelength, 1 wavelength, 1/2 wavelength, 1/4 wavelength in case of general antenna. Since RFID tag of LF band uses only magnetic wave of electromagnetic wave, it is efficient to obtain power by loop antenna And the antenna 340 is formed in relation to the length of the wavelength. For example, when the wavelength is 125 KHz, the antenna length should be 2,400 m at λ = f / c. However, since there is a capacitor value in the tag, the antenna efficiency should be 125 KHz, Therefore, the resonance frequency is determined by multiplying the internal parallel capacitor value and the loop coil value, thereby calculating the antenna length. That is, the larger the value of the internal capacitor, the smaller the length of the loop coil. This can reduce the length of the antenna coil by adding a parallel capacitor. At this time, the antenna 340 can be formed by winding along the outer peripheral surface of the magnetic body 320. The length of the antenna is determined by the communication frequency of the RFID tag and the reader, and the antenna 340 is formed by winding a coil having a length determined by the communication frequency on the magnetic body.

HF and UHF bands are almost impossible to use underground because they have a short antenna and are greatly affected by the dielectric constant. Especially in an environment with obstacles, underground burial identification devices are easily damaged and are likely to fail. Therefore, it is desirable to use the LF band which is less influenced by the obstacle and is strong against the external environment.

When the antenna 340 is wrapped around the outer circumferential surface of the magnetic body 320, it is possible to secure a length as much as necessary in the LF band. The magnetic body 320 may be a magnetic body having a frequency characteristic of the LF band. And is constituted by a circular antenna type in which a coil is wound around the magnetic body 320.

The magnetic body 320 allows an anisotropic ferrite magnet to be selected and has a magnitude of a magnetic field (1,600 to 2,000 Gauss) that can be recognized as a singularity by changing the flow of a geomagnetic field (0.3 to 0.6 Gauss) .

In the case where the magnetic body 320 forms an electromagnetic field in combination with the antenna coil, the electric field generated by the antenna coil is a physical object that is generated around the static electric field and the magnetic field generated by the magnetic body is generated around the magnetic pole. In a time-varying region, the charge moves and a magnetic field is always generated. When the magnetic field changes, an electric field is accompanied. In addition, the relationship between the electric field generated by the antenna coil and the magnetic field generated by the magnetic body is connected to the Maxwell equation, and one change leads to another change.

1B shows a body that allows the magnetic body 320 and the RFID tag 330 to be disposed. The upper end portion 311 and the lower end portion 313 of the body are made of a magnetic material 320 and the RFID tag 330. The inside of the body 312 is for providing a position of the magnetic body 320, the RFID tag 330 and the antenna 340 to mitigate the impact, , And adopts a plastic resin product having excellent durability and waterproofness. The upper end 311 of the body has a curved surface structure to display the N polarity of the magnetic field, and the upper surface thereof displays the direction, type, specification and the like of the embedding material.

The inside of the body 312 allows the magnetic body to be positioned at the center with the peripheral protrusion so that the coil of the antenna 340 is wound well along the outer circumferential surface.

Since the shape of the lower end 313 of the body is different according to the type of the embedding material, the adhesive can be easily formed using a moldable adhesive.

The view A of FIG. 3 shows that the electric field 510 of the RFID antenna coil and the magnetic field 520 of the magnetic body are combined to form the electromagnetic field 530. The electromagnetic field 530 is composed of the electric field 510 and the magnetic field 520 by the Faraday's law and the widened electromagnetic field 530 widens the area of the electromagnetic induction to extend the recognition distance of the RFID tag.

The upper surface of the upper portion 311 of the body of the underground object identification device may show the information of the buried object. The type displayed on the upper part is displayed as a unidirectional embedding sign, a right branch embedding sign, and a left branch embedding sign, and the information of the embedding information is displayed by the spatial restriction of the upper part, , Responsible person information, and so on.

Fig. 3B illustrates a block diagram of a generally known RFID tag composed of an RFID chip and an antenna. The RFID tag is composed of a transmitting and receiving unit 610 and a tag 620. The transmitting and receiving unit 610 is divided into a radio frequency 611 and an antenna 612 and converts the radio frequency 611 into an RF 611, Send and receive. In the present invention as well, generally known ones follow.

The tag 620 is divided into an analog amplification section 621, a digital section 622 and a memory section 623. The analog amplification section 621 extracts the data from the transmission / reception section 610, Stores or extracts data in the memory unit 623 and transmits / receives data to / from the reader.

The analog amplification unit 621 includes unit blocks such as a demodulator, a modulator, and a power generator, and generates power, extracts transmitted data, and transmits data to be transmitted.

The digital unit 622 includes unit blocks such as a power-on reset, a clock generator, and a controller. The digital unit 622 synchronizes the clock with the extracted data and controls the memory unit 623 according to a command received from the reader

The memory unit 623 includes an EEPROM and a booster circuit, and stores, reads, and erases data. The RFID stores the unique number of the RFID tag and the embedded information. The unique number is easy to distinguish from other underground burial identification devices and is not altered or deleted by any system. In addition, the buried information includes the type, size, location information, date, and information of the buried organization of the buried burial.

In the overall configuration diagram of Fig. 4, which shows the overall structure for a subterranean submerged display system,

A buried object 200 is buried under the ground 100 and a buried object identifying device 300 for notifying that the buried object 200 is buried is provided. The underground buried object identification device 300 including information on the buried object 200 transmits and receives data to and from the reader 400 through a radio frequency or processes the magnetic signal through a magnetic sensor.

The reader 400 includes a transceiver for communicating with an antenna of the underground object identification device 300 and an RFID tag composed of an RFID chip, a controller for controlling the RFID tag, and a magnetic signal of the magnetic substance of the underground object identification device 300 A central processing unit for processing information received from the GPS satellites 420, a GPS receiver, an LCD player for displaying map data, and various information And a mobile communication interface unit for communicating with a server 430 such as a host computer.

The underground buried-matter identification device 300, which contains information on the buried object 200, transmits / receives the read / write object 400 through the radio frequency. Secondly, when the depth of the buried substance is deep and the RFID tag can not be recognized, the magnetic signal of the magnetic body 320 is received through the magnetic sensor installed in the reader 400 and converted into magnetic field data, which is digital data, And various data such as various numerical values and graphs are displayed on the displayed displayer, and the present position of the underground object identification device 300 can be received in conjunction with the GPS satellite 420. The received location information is recorded and stored through the central processing unit.

Information of the embedded information 200 transmitted and received through the reader 400 is decoded by the server 430 through the mobile communication network 410 and provided to the user.

The server 430 also divides the plurality of underground object identification devices 300 according to the information retrieved from the reader 400 or retrieves the underground object identification devices 300 stored in the database of the server 430. Also, if the reader 400 is a smartphone or a laptop with an RFID function, it may be substituted for the server 430.

The server 430 further includes a database in which information of all the underground object identification devices 300 embedded in the basement is stored. The database includes a unique number management module in which the unique numbers of the underground object identification devices 300 are stored, A location coordinate management module in which the location coordinates of each underground buried object identification device 300 is stored and a reader 400 for transmitting and receiving the underground buried object identification information 300 And a reader management module for managing information. In the above description, the above-mentioned reconstruction is made by referring to the above-mentioned No. 1172944. [

Thus, the underground burial management system receives the information of the RFID tag through the reader 400 from the underground buried object identification device 300 disposed at the upper part of the buried object 200 or receives the magnetic signal and receives the information of the position coordinates received from the GPS satellite 420 It is possible to acquire information on the buried object 200 in cooperation with the server 430 through the mobile communication network 410 to facilitate maintenance.

On the other hand, the biggest reason for low recognition rate of RFID or magnetic field on the ground is that the buried material buried underground. In particular, RFID tags used in underground installations usually adopt a passive type, where it is not easy to reach a buried deep-sea buried underground radio wave from a reader.

5 and 6, in order to increase the recognition rate of the RFID propagation or the magnetic body magnetic force from the ground, the underground buried object identification device 300 is buried in the ground, And an extension 700 for stacking the posts 710 in multiple stages.

5A, the extension posts 710 include a body having a cylindrical bar shape; A fitting portion 720 formed at an upper end to have another cylindrical bar shape having a diameter smaller than that of the upper face and protrude upward from the upper face; And a lower end of which is inserted into the recess 730 so as to have a shape corresponding to the recess 720; .

6A, the extension posts 710 are stacked vertically in multi-stages with three or more, and the insert posts 720 of the extension posts that are stacked on top of the insert posts 720 of the underlying extension posts 730) are fitted and stacked.

The lower end of the extension post 710 disposed at the bottom is directly fixed to the underground burial material 200, and the fixing method is based on conventional methods such as adhesion, riveting, welding, and fastening. At this time, the extension posts 710 directly fixed to the underground objects 200 may be omitted as in the embodiment of FIG. 5C, and instead, the attachment surfaces 730 'may be formed at the lower ends thereof to improve the ease of attachment and fixation .

Referring to FIG. 5B for the connection between the underground object identification device 300 and the extension post 710, an extension post 710 having an attachment face 720 'instead of the fitting portion is provided at the upper end thereof. So that the lower end of the underground object identification device 300 can be attached to the fitting surface 720 'and adhered and fixed.

An auxiliary extension post 710` formed with a fitting receiving portion 730 is formed at the lower end of the underground object identification device 300 as shown in Figure D and the fitting portion 720 of the extension post 710, Or the like.

As shown in FIG. 6B, the display unit 740 may be formed to maintain the standard of the multi-stage extension posts 710 and to display the height information of the extension posts 710 by symbols such as numbers and letters. Thus, it is very easy to check the display portion 740 of the extension post 710 by digging the ground to see how deep the underground buried object is buried there. That is, the depth of the underground buried object 200 can be easily and accurately recognized.

The display method can be displayed by the user directly in numerals, and the extension posts 710 in which symbols are displayed in advance on the display unit 740 can be stacked in the order of symbols. For example, the symbol n1 display in FIG. 6B may be set to indicate 100 cm, the symbol n2 display 200 cm, and the symbol n3 display 300 cm.

The length of the extension posts 710 is preferably at least 30 cm or more so as not to take up much time for extending the height by being piled up during construction so that the extension posts 710 are easily counted if they are provided exactly 1 m short. However, if the length is too long, it may become difficult to install the paper as close as possible to the ground as shown in FIG. Of course, if you are too close to the ground, natural phenomena and excavation can easily expose the ground when it is folded.

6C, when the cross-sectional shapes of the fitting portion 720 and the fitting receiving portion 730 are different from each other, the symbol (FIG. 6C) indicating the depth of the underground buried object during the operation of stacking the extension posts 710 n1, n2, n3) are prevented from being mistakenly set in order, so that accurate installation can be performed. Here, in the embodiment of Fig. 6C, the fitting portion 720 of the extension post 710 having the display portion marked with the symbol n2 has a rectangular shape re, and the fitting portion 730 has the circular shape ci. Lt; / RTI > Accordingly, the extension post 710 marked with the symbol n3 naturally includes the insert receiving portion 730 of the rectangular shape re and the extension post 710 indicated by the symbol n1 naturally includes the insert portion 730 of the circular shape ci 720).

The present invention, together with an extension 700 configured as above,

An RFID chip is fixed to an upper end of the RFID chip. The RFID chip includes a memory in which a size, a type, a depth of buried, a location, an installation date, An underground buried object identifying device 300 configured to form an RFID tag with the RFID chip wound around a tag antenna coil and a lower end to be attached to the extended portion 700,

A reader for wirelessly reading the RFID tag on the ground;

A GPS satellite providing location coordinates information to the reader,

And a server computer communicating the reader and the embedded information.

An underground buried substance identification device 300; A magnetic body 320; An RFID chip 330; Antenna 340; An electric field 510; Magnetic field 520;

Claims (1)

An RFID chip is fixed to an upper end of the RFID chip. The RFID chip includes a memory in which a size, a type, a depth of buried, a location, an installation date, An underground buried object identification device comprising a tag antenna coil wound around the RFID chip to form an RFID tag together with the lower end thereof adhered and fixed to another place;
A cylindrical bar shape is provided with a length of exactly 1 m and a cylindrical bar shape is formed at an upper end thereof, a cylindrical bar shape having a diameter smaller than that of the upper end face is formed to form a fitting portion protruding from the upper face, A plurality of the extension posts are stacked vertically in a plurality of stages with at least three of the extension posts, and the inserts of the extension posts stacked on the insert portions of the extension posts located below are fitted And an extension part disposed at the bottom of the extension post is fixed by adhering the lower end of the extension post to the underground item;
A reader for reading the RFID tag on the ground;
A GPS satellite for providing position coordinates to the reader;
And a server computer for communicating the reader information with the embedded information.
KR1020120148992A 2012-12-19 2012-12-19 Magnet AND RFID KR20140079674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120148992A KR20140079674A (en) 2012-12-19 2012-12-19 Magnet AND RFID

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120148992A KR20140079674A (en) 2012-12-19 2012-12-19 Magnet AND RFID

Publications (1)

Publication Number Publication Date
KR20140079674A true KR20140079674A (en) 2014-06-27

Family

ID=51130688

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120148992A KR20140079674A (en) 2012-12-19 2012-12-19 Magnet AND RFID

Country Status (1)

Country Link
KR (1) KR20140079674A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017222271A1 (en) * 2015-06-18 2017-12-28 한국지질자원연구원 System and method for rapidly detecting ground subsidence

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017222271A1 (en) * 2015-06-18 2017-12-28 한국지질자원연구원 System and method for rapidly detecting ground subsidence
CN107526118A (en) * 2015-06-18 2017-12-29 韩国地质资源研究院 Quick detection collapses the system and method for hole

Similar Documents

Publication Publication Date Title
KR101172944B1 (en) A position identifier for providing underground facility information using RFID and magnetic substance
US8378841B2 (en) Tracking of oil drilling pipes and other objects
US7969295B2 (en) Device, system and method for the location and identification of as-built plants of pipes, conduits, cables or hidden objects
KR101259715B1 (en) Location Tracking System Using RFID
KR101714341B1 (en) Smart information marker for underground facility and information providing using management
CN105863735A (en) Geomagnetism and RFID (radiofrequency identification) radiofrequency combined underground positioning method
KR101337722B1 (en) Underground Management System
US10204298B2 (en) UHF RFID tag for marking underground assets and locations and method of using same
KR20050116587A (en) Survey control point indicator device and survey indicator management system using the same
KR20100111840A (en) Survey indicator radio-frequency indicator
JP3803777B2 (en) Storage medium unit and indicator for mounting the storage medium unit
KR101472117B1 (en) RFID Finder
KR20120064347A (en) The management system of measuring standard point
KR20140079674A (en) Magnet AND RFID
KR101637919B1 (en) ground fixing means including Radio-Frequency Identification device
KR20080056455A (en) A underground display apparatus mounted with a rfid tag
KR101364777B1 (en) Magnet Management System
CN208088294U (en) A kind of informationization anchor rod system
US9563796B1 (en) Radio frequency and near field ID tags with enlarged coil antenna for use with synthetic grass markers
KR100855690B1 (en) Line mark built-in rfid tag and system using the same
KR101639636B1 (en) Precision geodetic surveying system that improves positional changes of underground facilities
JP2023034994A (en) Information pile and method for managing information pile
JP7247656B2 (en) RF tag detection system for buried objects
KR20230009697A (en) A Tag Unit
KR100813670B1 (en) Building number board with rfid tag

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application