KR20160119368A - System for Detecting Train Position, Reader Therefor and Method for Detecting Train Position - Google Patents

System for Detecting Train Position, Reader Therefor and Method for Detecting Train Position Download PDF

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Publication number
KR20160119368A
KR20160119368A KR1020150047467A KR20150047467A KR20160119368A KR 20160119368 A KR20160119368 A KR 20160119368A KR 1020150047467 A KR1020150047467 A KR 1020150047467A KR 20150047467 A KR20150047467 A KR 20150047467A KR 20160119368 A KR20160119368 A KR 20160119368A
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South Korea
Prior art keywords
tag
switching signal
power transmission
reader
train
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KR1020150047467A
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Korean (ko)
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KR101709294B1 (en
Inventor
하동수
류현규
이재호
박성수
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한국과학기술원
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Priority to KR1020150047467A priority Critical patent/KR101709294B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/04—Indicating or recording train identities
    • B61L25/045—Indicating or recording train identities using reradiating tags
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A train position detection system according to an embodiment of the present invention includes a plurality of power transmission units sequentially driven in response to a switching signal generated based on position information of a tag installed on a sleeper and a current position of a train, And a tag that is driven in accordance with a power signal provided from a reader and a plurality of power transmission units to transmit the tag data to the reader.

Description

Field of the Invention [0001] The present invention relates to a train position detection system,

The present invention relates to a position detection system, and more particularly, to a train position detection system, a reader therefor, and a train position detection method.

The technology of detecting the location of a railway vehicle, that is, a train, has been developed in order to provide transportation information of a train to a control center to facilitate transportation planning and management.

2. Description of the Related Art Recently, as an automatic train operation device that minimizes human intervention has become popular, it is required to more accurately detect the position of a train for interval control of trains, train speed control, and the like. In addition, it is necessary to accurately detect the position of a train even for a location-based service such as a train arrival time notification service.

Generally, a radio-frequency identification (RFID) method is used for train position detection. That is, when an RFID reader installed on a train approaches an RFID tag installed on a sleeper, a tag is driven by a wireless power signal transmitted from the reader to the tag, and data of the tag, that is, position data is transmitted to the reader. The reader transmits the data received from the tag to the control center through the onboard control device, and thus the position of the train can be detected.

In the RFID system, power must be transmitted / received between the reader and the tag, and data must be transmitted / received. Therefore, enough time is required for the reader to communicate with the tag.

However, when the train is traveling at high speed, the contact time between the reader and the tag is inevitably shortened. As a result, the operation reliability of the tag is deteriorated, and the position of the train can not be accurately detected.

Embodiments of the present technology can provide a train position detection system capable of improving the reliability of position information detection, and a reader and a train position detection method therefor.

A train position detection system according to an embodiment of the present invention includes a plurality of power transmitters sequentially driven in response to a position information of a tag installed on a sleeper and a switching signal generated based on a current position of a train, A reader mounted on the reader; And a tag driven by a power signal provided from the plurality of power transmitting units to transmit tag data to the reader.

According to another aspect of the present invention, there is provided a train position detection system including a position switching signal generator for generating a switching signal based on position information of a tag installed on a sleeper and a current position of a train; And a plurality of power transmitters sequentially driven in response to the switching signal to transmit power to the tag, wherein the reader is mounted on the train.

A reader according to an embodiment of the present invention can wirelessly communicate with a tag installed in a sleeper, and is a reader mounted on a train. The reader transmits electric power to the tag, and electric power having a plurality of electric power transmission parts tilted at different angles Transmission module; And a data receiving unit for receiving tag data from the tag.

A method for detecting a train position according to an embodiment of the present invention includes a plurality of power transmission parts tilted at different angles and using a reader mounted on a train, Generating a switching signal based on the current position of the switch; Transmitting power to the tag by sequentially driving the plurality of power transmission units in response to the switching signal; And transmitting the tag data to the reader by the tag.

According to this technology, since the wireless power transmission efficiency between the reader and the tag is excellent, the reader can accurately collect the information of the tag. Therefore, the position of the train can be detected more reliably.

1 is a block diagram of a train position detection system according to an embodiment of the present invention.
2 is a configuration diagram of a reader according to an embodiment of the present technology.
3 is a block diagram of a power transmission module according to an embodiment of the present invention.
4 is a diagram for explaining a power transmission module control method according to an embodiment of the present invention.
5 is a configuration diagram of a tag that can be applied to the present technology.
6 is a configuration diagram of a switching signal generator according to an embodiment of the present invention.
7 is a flowchart illustrating a method of detecting a train position according to an embodiment of the present invention.
8 is a diagram for explaining the concept of wireless power transmission according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described more specifically with reference to the accompanying drawings.

1 is a block diagram of a train position detection system according to an embodiment of the present invention.

1, a train position detection system 10 according to an embodiment includes an on-board control device 112 and a reader 114 mounted on a train 110, a tag 120 installed on a railroad tie, , And a control center (130).

The on-board control device 112 may be configured to monitor or control the state of the train, such as the operating state of the propulsion control device, the braking device, and the auxiliary power device. The onboard controller 112 may be configured to detect, compare, and control the running speed of the train, estimate the position of the train, and receive the tag data received from the reader 114. The data generated and collected by the onboard control device 112 may be transmitted to the control center 130 via the wireless communication network.

The onboard controller 112 may be configured to generate a switching signal based on the position data of the tag 120 already stored and the current position of the train.

The reader 114 may be configured to be driven in response to a switching signal to generate power to activate the tag 120 and wirelessly transmit power to the tag 120. [ Also, as the tag data is transmitted from the tag 120, it can be received and demodulated and provided to the onboard controller 112. In one embodiment, the reader 114 may be an RFID reader.

In one embodiment of the present technique, the reader 114 may be configured to include a plurality of power transmitters, and FIG. 2 shows an example of the reader 20.

2, the reader 20 may be configured to include a control unit 210, a power transmission module 220, and a data receiving unit 230. [

The control unit 210 receives the switching signal from the on-vehicle control device 112 and controls the operation of the power transmission module 220 and receives the tag data from the data receiving unit 230 and transmits the tag data to the on- .

The power transmission module 220 may include a plurality of power transmission portions sequentially driven in response to the switching signal. In one embodiment, the first to third power transmission portions 222, 224, and 226 having respective tilting angles ). ≪ / RTI > The first to third power transmission units 222, 224, and 226 may be coil antennas, but are not limited thereto. That is, it is needless to say that the reader 20 and the tag 120 can be configured according to various wireless power transmission / reception schemes between the reader 20 and the tag 120.

3 is a block diagram of a power transmission module according to an embodiment of the present invention.

Referring to the power transmission module 30 shown in FIG. 3, the first power transmission unit 310 can be installed at a predetermined first angle (.theta.) With respect to the ground surface. The second power transmission unit 320 may be installed horizontally with respect to the ground surface. The third power transmission unit 330 may be installed to be symmetrical with respect to the first power transmission unit 310 on the basis of a vertical line to the ground surface. In one embodiment, the first to third power transmission units 310, 320, and 330 may have a common center point, but are not limited thereto.

The first power transmission unit 310, the second power transmission unit 320, and the third power transmission unit 330 are sequentially driven by a switching signal to transmit power to the tag 120. Accordingly, when the tag 120 is activated, the data receiving unit 230 receives the tag data, and the control unit 210 can provide the tag data to the onboard control unit 112.

4 is a diagram for explaining a power transmission module control method according to an embodiment of the present invention.

For example, when the train 110 is approaching the tag 120, the first switch SW1 of the switching unit 212 is turned on by the first switching signal SW < 0 > The transmitter 310 may be driven to provide power to the tag 120. The first switch SW1 is turned off and the switching unit 212 is turned on by the second switching signal SW < 1 > in the section where the train 110 continues to travel and the readers 114 and 20 overlap the tag 120. [ The second switch SW2 of the tag 120 is turned on and the second power transfer unit 320 is driven to provide power to the tag 120. [ The second switch SW2 is turned off and the third switch SW3 of the switching unit 212 is turned on by the third switching signal SW < 2 >, after the train 110 has passed the installation position of the tag 120 And the third power transmission unit 330 is driven to supply power to the tag 120. [

That is, in this embodiment, during the time that the first to third power transmission units 222/310, 224/320, 226/330 are sequentially driven in response to the switching signals SW <0: 2> 20 and the tag 120 can communicate wirelessly. Therefore, the contact time between the reader 114, 20 and the tag 120 can be sufficiently secured.

In one embodiment, the first angle? Can be determined within an angular range that maximizes the wireless power transfer efficiency from the first power transfer portion 222, 310 to the tag 120, based on the running speed of the train have.

5 is a configuration diagram of a tag that can be applied to the present technology.

In one embodiment, the tag 40 includes a power receiver 420 that receives power transmitted from the reader 114, 20, and a power receiver 420 that is activated by the power receiver 410 and that stores the tag data and controls the operation of the tag An IC chip 420 and a data transmission unit 430 for transmitting the tag data stored in the IC chip 420 to the readers 114 and 20.

In the case where the power transmission modules 220 and 30 provided in the reader are constituted by coil antennas, it is needless to say that the power receiving unit 410 provided in the tags 120 and 40 may also be constituted by a coil antenna.

The tag data stored in the IC chip 420 may include position data in which the tag is installed, and may further include additional data if necessary.

6 is a configuration diagram of a switching signal generator according to an embodiment of the present invention.

Referring to FIG. 6, the switching signal generator 50 may include a controller 510, a position measuring unit 520, and a tag information manager 530.

The position measuring unit 520 can estimate the current position of the train in motion, substantially the current position of the reader 114, 20. For this purpose, the position measuring unit 520 can estimate the position of the train by fusing various position and speed detecting sensors such as a position navigation, a wheel sensor, and an inertial sensor.

The tag information management unit 530 may be configured to store and manage location information of each tag installed in the sleepers.

Therefore, the position measuring unit 520 sets the switching signals SW < 0: 2 > on the basis of the current positions of the trains (the readers 114 and 20) and the position information of the tags 120 and 40 installed at the foremost position of the train Can be generated.

In one embodiment, the position measurement unit 520 configures the power transmission module 220, 30 when the distance between the reader 114, 20 and the tag 120, 40 is a predetermined distance (for example, 500 mm) (SW < 0: 2 >) so as to sequentially drive the respective power transfer units 222/310, 224/320, 226/330.

For example, when the distance between the reader 114, 20 and the tags 120, 40 reaches a predetermined distance, the first power transmission unit 222, 310 is enabled by enabling the first switching signal SW <0> . When the reader 114, 20 and the tags 120, 40 overlap each other after a predetermined time, the first switching signal SW <0> is disabled while the second switching signal SW <1> So that the second power transmission units 224 and 320 are driven. Thereafter, when the reader 114, 20 passes the tag 120, 40, it disables the second switching signal SW <1> and enables the third switching signal SW <2> Thereby causing the sections 226 and 330 to be driven. Then, the third switching signal SW < 2 > is disabled when the distance between the reader 114,20 and the tag 120,40 is out of a predetermined distance.

Accordingly, the power from the wireless power transmission module 220, 30 to the tags 120, 40 can be reduced to a predetermined value, for example, until the reader 114, 20 reaches a predetermined distance from the tags 120, . &Lt; / RTI &gt;

On the other hand, the switching signal generator 50 shown in FIG. 6 can be configured inside or outside the on-vehicle controller 112. In addition, various methods such as a GPS-based method, a cell method using a base station, an Assisted-GPS-based method, and a D-Differential-GPS-based method can be used to estimate the current position of a train (substantially a reader).

FIG. 7 is a flowchart for explaining a method of detecting a train position according to an embodiment of the present invention, which will be described with reference to a conceptual diagram shown in FIG.

As the train 110 starts to operate, the switching signal generator 50, which may be configured inside or outside the on-board controller 112, estimates the position of the train, substantially the readers 114 and 20 (S101). The switching signal generator 50 generates a switching signal SW <0: 2> based on the current position of the interrogators 114 and 20 and the previously stored tag position information (S103) 114, and 20 (S105).

The plurality of power transmission units 222/310, 224/320, 226/330 provided in the readers 114 and 20 are sequentially driven in response to the switching signals SW <0: 2>.

For example, at a position (a) where the distance between the reader (114,20) installed on the train (110) and the tag (120,40) installed on the sleeper (150) is a predetermined distance, the first switching signal 0 &gt;) is enabled to drive the first power transmission unit 222/310 (S107). Power is transmitted to the tags 120 and 40 through the first power transmission unit 222/310 (S109).

The first switching signal SW < 0 > is disabled and the second switching signal SW (SW) is turned off at the position &quot; b &quot; where the trains 114, <1>) is enabled, and the second power transfer unit 224/320 is driven (S111). Accordingly, power is transmitted to the tags 120 and 40 through the second power transmission unit 224/320 (S113).

Subsequently, at a position c where the reader 114, 20 passes the tags 120, 40, the second switching signal SW <1> is disabled and the third switching signal SW <2> And the third power transmission unit 226/330 is driven (S115). Power is transmitted to the tags 120 and 40 through the third power transmission unit 226/330 (S117). The third switching signal SW < 2 > may be disabled if the distance between the reader 114,20 and the tag 120,40 is out of a predetermined distance.

The IC chip 420 of the tags 120 and 40 is activated by the received power signal and the tag data stored in the IC chip 420 is transmitted to the reader 114 and 20 (S119).

The readers 114 and 20 can provide the tag data received through the data receiving unit 230 to the onboard control device 112.

As a result, the plurality of power transmission units provided in the reader are sequentially driven in accordance with the positional relationship with the tag, so that the communication time between the reader and the tag is sufficiently secured, and accordingly, the reader can reliably and reliably collect the tag data.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: Train position detection system
110: Train
112: on-board control device
114, 20: Reader
120, 40: tag
130: Control center
50: switching signal generator

Claims (18)

A plurality of power transmitters sequentially driven in response to a switching signal generated based on position information of a tag installed on the sleeper and a current position of the train, the reader being mounted on the train; And
The tag being driven according to a power signal provided from the plurality of power transmission units and transmitting tag data to the reader;
The train position detection system comprising: The method according to claim 1,
The reader includes a first power transmission unit tilted at a predetermined angle with respect to an earth surface;
A second power transmission unit installed horizontally with respect to the ground surface; And
A third power transmission unit installed to be symmetrical with respect to the first power transmission unit based on a vertical line to the ground surface;
The train position detection system comprising: 3. The method of claim 2,
Wherein the first power transmission unit is driven by a first switching signal that is enabled when the distance between the reader and the tag is a predetermined distance,
Wherein the second power transmission unit is driven by a second switching signal that is enabled when the tag and the reader overlap,
And the third power transmission unit is driven by a third switching signal that is enabled when the reader passes the tag. The method of claim 3,
Wherein the first switching signal is disabled when the second switching signal is enabled and the second switching signal is disabled when the third switching signal is enabled, And is disabled when the predetermined distance is exceeded. The method according to claim 1,
And a switching signal generator for generating the switching signal and providing the switching signal to the reader. 6. The method of claim 5,
Wherein the switching signal generator comprises: a tag information manager for storing and managing position information of the tag; And
A position measuring unit for estimating a current position of the train and generating the switching signal based on positional information of a tag installed at a foremost position of the train;
The train position detection system comprising: A position switching signal generator for generating a switching signal based on position information of a tag installed on a sleeper and a current position of a train; And
And a plurality of power transmitters sequentially driven in response to the switching signal to transmit power to the tag, wherein the reader is mounted on the train;
The train position detection system comprising: 8. The method of claim 7,
The switching signal generator includes a tag information manager for storing and managing position information of a tag; And
A position measuring unit for estimating a current position of the train and generating the switching signal based on positional information of a tag installed at a foremost position of the train;
The train position detection system comprising: 9. The method of claim 8,
Wherein the switching signal is a first switching signal enabled when a distance between the reader and a tag provided at the forefront is a predetermined distance;
A second switching signal that is enabled when the reader and the tag located at the forefront are overlapped; And
A third switching signal that is enabled when the reader passes the tag located at the forefront;
The train position detection system comprising: 8. The method of claim 7,
The reader includes a first power transmission unit tilted at a predetermined angle with respect to an earth surface;
A second power transmission unit installed horizontally with respect to the ground surface; And
A third power transmission unit installed to be symmetrical with respect to the first power transmission unit based on a vertical line to the ground surface;
The train position detection system comprising: 11. The method of claim 10,
Wherein the first power transmission unit is driven by a first switching signal that is enabled when the distance between the reader and the tag is a predetermined distance,
Wherein the second power transmission unit is driven by a second switching signal that is enabled when the tag and the reader overlap,
And the third power transmission unit is driven by a third switching signal that is enabled when the reader passes the tag. 12. The method of claim 11,
Wherein the first switching signal is disabled when the second switching signal is enabled and the second switching signal is disabled when the third switching signal is enabled, And is disabled when the predetermined distance is exceeded. A reader mounted on a train, capable of wireless communication with a tag installed on a sleeper,
A power transmission module that transmits power to the tag and has a plurality of power transmission portions that are tilted at different angles; And
A data receiving unit for receiving tag data from the tag;
. &Lt; / RTI &gt; 14. The method of claim 13,
The power transmission module includes: a first power transmission unit tilted at a predetermined angle with respect to an earth surface;
A second power transmission unit installed horizontally with respect to the ground surface; And
A third power transmission unit installed to be symmetrical with respect to the first power transmission unit based on a vertical line to the ground surface;
. &Lt; / RTI &gt; 14. The method of claim 13,
Wherein each of the plurality of power transmission units is driven by a switching signal generated based on position information of the tag and a current position of the train. A train position detection method using a reader mounted on a train, comprising a plurality of electric power transmission parts tilted at different angles,
Generating a switching signal based on position information of a tag installed on a sleeper and a current position of the train;
Transmitting power to the tag by sequentially driving the plurality of power transmission units in response to the switching signal; And
The tag transmitting tag data to the reader;
And detecting the position of the train. 17. The method of claim 16,
The reader includes a first power transmission unit tilted at a predetermined angle with respect to the ground surface, a second power transmission unit installed horizontally with respect to the ground surface, and a second power transmission unit connected to the first power transmission unit, And a third power transmission part provided symmetrically,
The step of transmitting power to the tag comprises:
Transmitting the power to the tag by driving the first power transmitting unit by a first switching signal enabled when the distance between the reader and the tag is a predetermined distance;
Transmitting the power to the tag by the second power transmitting unit by a second switching signal enabled when the reader and the tag overlap; And
Transmitting the power to the tag by the third power transmission unit being driven by a third switching signal enabled when the reader passes the tag;
And detecting the position of the train. 18. The method of claim 17,
Wherein the first switching signal is disabled when the second switching signal is enabled and the second switching signal is disabled when the third switching signal is enabled, And is disabled when the predetermined distance is exceeded.
KR1020150047467A 2015-04-03 2015-04-03 System for Detecting Position of High-Speed Train, Reader Therefor and Method for Power Transmission Based on Tilted Coils KR101709294B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113276911A (en) * 2021-07-08 2021-08-20 中铁二院工程集团有限责任公司 Suspension type monorail vehicle section train position detection method and system

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KR100812534B1 (en) * 2006-08-23 2008-03-12 에스케이 텔레콤주식회사 Low power rfid system and method, reader applied to the same
KR101374350B1 (en) * 2012-12-04 2014-03-19 한국철도기술연구원 Apparatus for detecting position of train

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Publication number Priority date Publication date Assignee Title
KR20070090511A (en) * 2006-03-03 2007-09-06 엘지이노텍 주식회사 Distribution administration system using radio frequency identification
KR100812534B1 (en) * 2006-08-23 2008-03-12 에스케이 텔레콤주식회사 Low power rfid system and method, reader applied to the same
KR101374350B1 (en) * 2012-12-04 2014-03-19 한국철도기술연구원 Apparatus for detecting position of train

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113276911A (en) * 2021-07-08 2021-08-20 中铁二院工程集团有限责任公司 Suspension type monorail vehicle section train position detection method and system

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