JP2022147475A - train identification system - Google Patents

Abstract

To suppress wrong determination that erroneously determines a train traveling on a track next to a target track as a track traveling on the target track in a train identification system.SOLUTION: A train identification system (20) identifying a train traveling on a target track (11) includes: IC tags (31, 32) fitted to a train (13) and transmitting identification information about the train on the basis of energy of received radio waves; a read part (21) which transmits radio waves to a prescribed position the train traveling on the target track passes, receives the identification information transmitted by the IC tags, and reads it; a distance measuring part (22) which irradiates electromagnetic waves different from the radio waves to the prescribed position and measures a distance from itself to an object on the basis of the electromagnetic waves reflected by the object; and an identification part (23) which determines that the train is present at the prescribed position on the basis of the measured distance and identifies the train traveling on the target track on the basis of the identification information read by the read part under the condition that the identification information is read by the read part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a system for identifying trains running on target tracks.

Conventionally, a wireless communication medium between an RFID tag mounted on each vehicle that composes a train and storing individual identification information of the vehicle and the RFID tag via an antenna installed near the track on which the train runs. and a reader that transmits and receives a signal from the RFID tag and reads the individual identification information of the vehicle from the signal transmitted from the RFID tag (see Patent Document 1).

JP 2011-251672 A

By the way, when identifying trains running on the target track, in order to be able to identify trains running on the target track at high speed (for example, 100 km/h), it is necessary to set the readable range of the reader to a certain extent. . In this case, the reader's readable range includes the track adjacent to the target track, and there is a possibility that a train running on the track adjacent to the target track is erroneously determined to be a train running on the target track.

The present invention has been made to solve these problems, and its main purpose is to misjudge a train running on a track adjacent to a target track as a train running on the target track in a train identification system. It is to suppress what you do.

The first means for solving the above problems is
A train identification system for identifying trains running on a target track,
an IC tag that is attached to a train and transmits identification information of the train based on the energy of the received radio wave;
a reading unit that transmits the radio wave toward a predetermined position through which the train running on the target track passes, receives and reads the identification information transmitted by the IC tag;
a distance measuring unit that irradiates an electromagnetic wave different from the radio wave toward the predetermined position and measures the distance from itself to the object based on the electromagnetic wave reflected by the object;
It is determined that the train exists at the predetermined position based on the distance measured by the distance measuring unit, and the identification information is read by the reading unit. an identification unit that identifies a train running on the target line based on the identification information;
Prepare.

According to the above configuration, the IC tag is attached to the train and transmits identification information of the train based on the energy of the received radio waves. The reading unit transmits the radio waves toward a predetermined position through which a train running on the target track (hereinafter referred to as "target train") passes, and receives and reads the identification information transmitted by the IC tag. Therefore, when a train passes a predetermined position on the target track, the IC tag of the target train transmits identification information of the train, and the reading unit reads the identification information. On the other hand, even if a train passes on a track next to the target track (hereinafter referred to as "neighboring track"), the IC tag of the train running on the adjacent track (hereinafter referred to as "neighboring train") transmits the train identification information. However, the reading unit may read the identification information.

Here, the distance measuring unit irradiates an electromagnetic wave different from the radio wave toward the predetermined position, and measures the distance from itself to the object based on the electromagnetic wave reflected by the object. Therefore, when the train is running on the target track, the rangefinder measures the distance from the rangefinder to the target train. On the other hand, when the train is running on the adjacent track, the distance measuring unit measures the distance from the distance measuring unit to the adjacent train, that is, the distance different from the distance from the distance measuring unit to the target train. Therefore, it is possible to determine whether or not a train is present at a predetermined position based on the distance measured by the distance measuring unit.

Then, the identification unit determines that the train is present at the predetermined position based on the distance measured by the distance measurement unit, and on the condition that the identification information is read by the reading unit, A train running on the target track is identified based on the identification information read by the reading unit. That is, if the identifying unit does not determine that the train exists at the predetermined position based on the distance measured by the distance measuring unit, based on the identification information read by the reading unit It is not performed to identify trains running on said target track. Further, the identification unit does not identify the train running on the target track even when the identification information is not read by the reading unit. Therefore, when a train is running on the adjacent track, the identifying unit should not identify the train running on the target track based on the identification information read by the reading unit. can be done. Therefore, in the train identification system, it is possible to suppress erroneous determination that a train running on the adjacent track is a train running on the target track. On the other hand, when a train runs on the target track, the identifying section can identify the train running on the target track based on the identification information read by the reading section.

In the second means, the identification unit transmits the radio waves by the reading unit on condition that the train is determined to be present at the predetermined position based on the distance measured by the distance measuring unit. to read the identification information, and the train running on the target track is identified based on the identification information read by the reading unit.

A third means is
A train identification system for identifying trains running on a target track,
an IC tag that is attached to a train and transmits identification information of the train based on the energy of the received radio wave;
a reading unit that transmits the radio wave toward a predetermined position through which the train running on the target track passes, receives and reads the identification information transmitted by the IC tag;
a distance measuring unit that irradiates an electromagnetic wave different from the radio wave toward the predetermined position and measures the distance from itself to the object based on the electromagnetic wave reflected by the object;
On the condition that it is determined that the train is present at the predetermined position based on the distance measured by the distance measuring unit, causing the reading unit to transmit the radio wave to read the identification information, and an identification unit that identifies a train running on the target track based on the identification information read by the unit;
Prepare.

According to the above configuration, the identification unit transmits the radio waves from the reading unit on the condition that the train is determined to be present at the predetermined position based on the distance measured by the distance measuring unit. to read the identification information. That is, if the identification unit does not determine that the train is present at the predetermined position based on the distance measured by the distance measurement unit, the identification unit causes the reading unit to transmit the radio wave. Do not read information. Therefore, when a train is running on the adjacent track and the train is not running on the target track, the identification unit prevents the reading unit from transmitting the radio wave and reading the identification information. can be Therefore, it is possible to prevent the IC tag of the adjacent train from transmitting the identification information, and it is possible to prevent the reading unit from reading the identification information of the adjacent train.

On the other hand, when the identification unit determines that the train is present at the predetermined position based on the distance measured by the distance measurement unit, the identification information is obtained by transmitting the radio waves from the reading unit. make it read. In this case, since the radio wave directed to the adjacent train is blocked by the train existing at the predetermined position, it is possible to suppress the radiation of the radio wave to the adjacent train. It is possible to suppress erroneous determination that it is a train. Then, the reading unit can transmit the radio wave to a train existing at a predetermined position, and receive and read the identification information transmitted by the IC tag. Therefore, the identification unit can identify the train running on the target track.

In the fourth means, the distance measurement unit further measures the size of the object, and the identification unit determines whether or not the train is at the predetermined position based on the distance and the size measured by the distance measurement unit. determines whether exists. According to this configuration, when the distance from the distance measuring unit to the object is measured based on the electromagnetic waves reflected by the object, the identification unit determines whether the object is a train or an obstacle other than a train. can be determined based on the size of the object measured by the rangefinder. Therefore, it is possible to suppress erroneous determination that a train exists at a predetermined position when the electromagnetic wave emitted from the distance measuring unit is reflected by an obstacle or the like other than the train.

In the fifth means, operation information including the estimated arrival time of a train arriving at the predetermined position and identification information, and whether or not the train will arrive at the predetermined position at the estimated arrival time are input to the identification unit. and the identification unit identifies a train running on the target track based on the input operation information when it is input that a train arrives at the predetermined position at the scheduled arrival time, When it is input that the train does not arrive at the scheduled arrival time, the train running on the target track is identified based on the identification information read by the reading unit.

According to the above configuration, in the identification unit, operation information including the estimated arrival time and identification information of the train arriving at the predetermined position, and whether or not the train will arrive at the predetermined position at the estimated arrival time are input. be done. Therefore, the identification unit can grasp whether or not the train will arrive at the predetermined position at the scheduled arrival time.

Here, when a train arrives at the predetermined position at the scheduled arrival time, the train running on the target line can be easily identified based on the operation information. On the other hand, if the train does not arrive at the predetermined position at the scheduled arrival time, there is a possibility that the train arriving at the predetermined position is different from the train identified based on the operation information. Unable to identify which train to use.

In this regard, the identification unit identifies a train traveling on the target track based on the identification information read by the reading unit when it is input that the train will not arrive at the predetermined position at the scheduled arrival time. do. Therefore, even if the train running on the target track cannot be identified based on the operation information, the train running on the target track can be identified based on the identification information read by the reading unit. can.

In the sixth means, the identification unit causes the reading unit to transmit the radio waves after a predetermined time has elapsed since the distance from itself to the train running on the target line was measured by the distance measuring unit, and the The identification information is read, and the train running on the target track is identified based on the identification information read by the reading unit. According to this configuration, when the distance from itself to the train running on the target track is measured by the distance measuring unit, that is, when the head of the train running on the target track is within the readable range of the range measuring unit. After the elapse of a predetermined time from the identification information, the identification information can be read by causing the reading unit to transmit the radio wave. Therefore, it becomes easier to read the identification information in a state where the target train blocks the radio waves directed to the adjacent track and the adjacent train, and suppresses the misjudgment that a train running on the adjacent track is a train running on the target track. can do.

In a seventh means, the identifying section sets the predetermined time based on the speed of the train running on the target track. According to such a configuration, it is possible to appropriately set the timing for causing the reading unit to transmit the radio wave and read the identification information according to the speed of the train running on the target track.

In the eighth means, the IC tags are attached to a plurality of cars of the train, respectively, and the identification section identifies the target track based on the identification information of the plurality of IC tags read by the reading section. Identify trains running on According to such a configuration, it is possible to more carefully identify the train running on the target track based on the identification information of the plurality of read IC tags.

Schematic diagram of train identification system. FIG. 2 is a schematic diagram showing how a reader transmits radio waves; The schematic diagram which shows the aspect which reads ID of an adjacent train erroneously. A flow chart showing a procedure of train identification. The schematic diagram which shows the example of a change of a train identification system. The schematic diagram which shows the other aspect which reads ID of an adjacent train erroneously.

An embodiment will be described below with reference to the drawings. This embodiment is embodied as a train identification system for identifying trains on station platforms.

As shown in FIG. 1, a train 13 runs on a track 11 (target track). At the station, a platform 12 is provided adjacent to a track 11. - 特許庁The platform 12 is provided at a specified distance from the track 11. - 特許庁

The train identification system 20 includes tags 31 and 32, a reader 21, an area sensor 22, a control section 23, and the like.

The tags 31 and 32 (IC tags) are passive RF (Radio Frequency) tags equipped with antennas, ICs, memories, and the like. The tags 31 and 32 operate using radio waves received from the reader 21 as a power source (energy). The tags 31 and 32 are attached to the train 13, and upon receiving radio waves from the reader 21, transmit radio waves containing the ID (identification information) of the train 13 stored in the memory. ID is a unique number for each train. The tag 31 (first IC tag) is attached to the right side (right side) of the train 13 . The tag 32 (second IC tag) is attached to the left side (left side) of the train 13 . Of the tags 31 and 32, the tag 32 located on the opposite side of the reader 21 is in a state where it is difficult to transmit an ID based on the energy of the received radio waves because the radio waves transmitted by the reader 21 are blocked by the train 13 itself. Become.

The reader 21 (reading unit) is an RFID (Radio Frequency IDentification) reader including an antenna, a transmitting unit, a receiving unit, a control unit, and the like. The reader 21 transmits radio waves to the tags 31 and 32, receives radio waves including IDs returned (transmitted) from the tags 31 and 32, and reads the IDs. As shown in FIG. 2, the reader 21 transmits radio waves to a predetermined position P through which the train 13 running on the track 11 passes. The predetermined position P faces the rear end portion of the platform 12 and is above the track 11 and lower than the height of the train 13 . The reader 21 is controlled by the control section 23 , and the result of reading by the reader 21 is input to the control section 23 .

The reader 21 needs to read the ID transmitted by the tag 31 before the train 13 stops. Also, in the train 13 that does not stop at the platform 12, it is necessary to read the ID of the tag 31 of the train 13 passing at high speed. Therefore, the readable range of the reader 21 is set to be wide to some extent. For example, in order to correctly read the ID of the tag 31 of the train 13 traveling at 100 km/h, it is necessary to set the radius of the readable range to 10 to 12 [m].

Due to the above circumstances, the readable range is set to be wide to some extent, so if there is a line 15 parallel to the line 11 as shown in FIG. 3, the following problems arise. That is, the radio waves transmitted by the reader 21 may reach the tag 36 of the train 17 running on the track 15 and the tag 36 may return the ID of the train 17 . In this case, the reader 21 may erroneously identify the train corresponding to the ID transmitted by the tag 36 as the train running at the predetermined position P on the track 11 . A similar problem may occur when the reader 25 installed on the platform 16 adjacent to the track 15 reads the ID of the tag 35 .

Therefore, as shown in FIGS. 1 and 2, the train identification system 20 includes an area sensor 22. FIG. The area sensor 22 (distance measuring unit) detects an object that has entered the area A set in advance. The area A can detect an object at the predetermined position P, and is desirably set so as not to detect the train 17 running on the adjacent track 15 . The area sensor 22 irradiates, for example, a laser beam (electromagnetic waves) horizontally at predetermined angles, measures the distance from itself to the object (detects the object) based on the time it takes for the object to be reflected back, and detects the laser beam. The direction of the object is specified based on the irradiation angle (irradiation direction) of . Furthermore, the area sensor 22 measures the position and size of the object based on the distance from itself to the object and the direction of the object. The area sensor 22 is controlled by the controller 23 , and the measurement result obtained by the area sensor 22 is input to the controller 23 .

The control unit 23 (identification unit) is configured by a microcomputer including a CPU, ROM, RAM, input/output interface, and the like. Based on the distance measured by the area sensor 22, the control unit 23 determines that the train is present at the predetermined position P, and on the condition that the ID is read by the reader 21, the ID is read by the reader 21. A train running on the track 11 is identified based on the ID.

FIG. 4 is a flow chart showing the train identification procedure. This series of processes is executed by the control unit 23 .

First, it is determined whether or not the area sensor 22 has detected an object (S10). In this determination, when it is determined that the area sensor 22 has not detected an object (S10: NO), the process is executed again from S10.

On the other hand, if it is determined in S10 that the area sensor 22 has detected an object (S10: YES), it is determined whether the position and size of the object are correct for the train 13 (S11). Specifically, when the measured position (distance to the object) and size of the object correspond to the position and size of a train 13 passing through a predetermined position P, the position and size of the object correspond to the position and size of the train. 13 is determined to be correct. On the other hand, when the position of the measured object is greatly deviated from the predetermined position P (for example, when the position of the measured object corresponds to the position of a train running on the adjacent railroad track 15), the position of the measured object When the size of the object is clearly smaller than the train 13 (for example, when a bird crosses over), it is determined that the position and size of the object are not correct for the train 13 . In this determination, when it is determined that the position and size of the object are not correct for the train 13 (S11: NO), the process is executed again from S10.

On the other hand, when it is determined that the position and size of the object are correct for the train 13 (S11: YES), the reading of the ID by the reader 21 is started (S12). Specifically, the reader 21 is caused to start transmitting radio waves toward the predetermined position P, and when radio waves including an ID are received, the ID is read. That is, on the condition that it is determined that a train exists at a predetermined position P based on the distance measured by the area sensor 22, the reader 21 is caused to transmit radio waves to read the ID. Then, the train is identified from the read ID (S13). Specifically, the train running at the predetermined position P on the track 11 at the current time is identified as the train corresponding to the read ID.

Subsequently, it is determined whether or not the area sensor 22 has detected an object, detected a train stop signal, or detected a departure of a train from the platform 12 (S14). In this determination, if all of the determinations are negative (S14: NO), the process from S13 is executed again.

On the other hand, in the determination of S14, if either is determined to be affirmative (S14: YES), reading of the ID by the reader 21 is terminated (S15). Specifically, the transmission of radio waves toward the predetermined position P by the reader 21 is terminated. That is, when the train stops at the platform 12 or departs from the platform 12, it is determined that the period for identifying the train has ended, and the reading of the ID by the reader 21 is terminated. After that, this series of processing ends (END).

The embodiment detailed above has the following advantages.

The area sensor 22 irradiates a laser beam different from the radio waves emitted by the reader 21 toward the predetermined position P, and measures the distance from itself to the object based on the laser beam reflected by the object. Therefore, when the train 13 is running on the track 11 , the area sensor 22 measures the distance from the area sensor 22 to the train 13 . On the other hand, when the train 17 is running on the track 15 , the area sensor 22 measures the distance from the area sensor 22 to the train 17 , that is, the distance different from the distance from the area sensor 22 to the train 13 . Therefore, based on the distance measured by the area sensor 22, it is possible to determine whether the train 13 is present at the predetermined position P or not.

・The control unit 23 determines that the train 13 exists at the predetermined position P based on the distance measured by the area sensor 22, and on the condition that the ID is read by the reader 21, the ID is read by the reader 21. A train running on the track 11 is identified based on the received ID. That is, if the control unit 23 does not determine that the train is present at the predetermined position P based on the distance measured by the area sensor 22, the control unit 23 runs on the track 11 based on the ID read by the reader 21. It does not run to identify the train that does. Therefore, when the train 17 is running on the track 15, the controller 23 may not identify the train 13 running on the track 11 based on the ID read by the reader 21. can. Therefore, in the train 13 identification system, erroneous determination that the train 17 running on the track 15 is the train 13 running on the track 11 can be suppressed. On the other hand, when a train is running on the track 11 , the controller 23 can identify the train 13 running on the track 11 based on the ID read by the reader 21 .

The controller 23 causes the reader 21 to transmit radio waves and read the ID on the condition that the train is present at the predetermined position P based on the distance measured by the area sensor 22 . That is, if the control unit 23 does not determine that a train exists at the predetermined position P based on the distance measured by the area sensor 22, the controller 23 causes the reader 21 to transmit radio waves to read the ID. don't run For this reason, when the train 17 is running on the track 15 and the train 13 is not running on the track 11, the controller 23 prevents the reader 21 from transmitting radio waves to read the ID. can do. Therefore, it is possible to prevent the tag 36 of the train 17 from transmitting the ID, and it is possible to prevent the reader 21 from reading the ID of the train 17 .

When the controller 23 determines that a train is present at the predetermined position P based on the distance measured by the area sensor 22, the controller 23 causes the reader 21 to transmit radio waves to read the ID. In this case, since the radio wave directed to the train 17 is blocked by the train existing at the predetermined position P, the irradiation of the radio wave to the train 17 can be suppressed. It is possible to suppress erroneous determination that the train 13 is running. Then, the reader 21 can transmit radio waves to the train existing at the predetermined position P, and receive and read the ID transmitted by the tag 31 . Therefore, the controller 23 can identify the train 13 running on the track 11 .

The area sensor 22 further measures the size of the object, and the control unit 23 determines whether the train 13 is present at the predetermined position P based on the position (distance) and size measured by the area sensor 22. determine whether According to this configuration, when the distance from the area sensor 22 to the object is measured based on the laser beam reflected by the object, the control unit 23 determines whether the object is a train or an obstacle other than a train. can be determined based on the size of the object measured by the area sensor 22 . Therefore, it is possible to suppress erroneous determination that a train exists at the predetermined position P when the laser beam emitted from the area sensor 22 is reflected by an obstacle or the like other than the train.

A configuration in which the reader 21 transmits radio waves from above the train and reads the ID of the tag is also conceivable. However, since there is no structure supporting the leader 21 above the train, it is difficult to install the leader 21 above the train. In addition, electric wires are arranged above the train and pantographs are often provided above the train, which also makes it difficult to install the reader 21 above the train. Therefore, the reader 21 must be installed on the side of the train, such as the platform 12, and this embodiment is significant in that it is possible to suppress erroneous identification of the train that occurs in that case.

- In many cases, an area sensor is installed in advance on the platform 12 in order to detect a person entering the track. Therefore, the train identification system 20 can also determine whether or not a train is present at the predetermined position P using an area sensor set in advance on the platform.

It should be noted that the above embodiment can be modified as follows. Parts that are the same as those in the above embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

・In the flow chart of FIG. 4, the order of the processing of S10 to S12 may be changed. Even in that case, it is determined that the train exists at the predetermined position P, provided that the area sensor 22 detects the object and that the position and size of the detected object are correct for the train 13. On this condition, the control unit 23 will identify the train running on the track 11 based on the ID read by the reader 21 .

- The area sensor 22 is not limited to laser light, and may emit millimeter waves (electromagnetic waves) or the like.

In general, to the control unit 23, operation information including the scheduled arrival time and ID of the train 13 arriving at the predetermined position P, and whether or not the train 13 will arrive at the predetermined position P at the scheduled arrival time are input. Then, when it is input that the train 13 arrives at the predetermined position P at the scheduled arrival time, the control unit 23 identifies the train 13 traveling on the track 11 based on the input operation information, and arrives at the predetermined position P. When it is input that the train 13 does not arrive at the scheduled time, the train 13 running on the track 11 may be identified based on the ID read by the reader 21 as in the above embodiment.

According to the above configuration, the operation information including the estimated arrival time and ID of the train 13 arriving at the predetermined position P, and whether or not the train 13 will arrive at the predetermined position P at the scheduled arrival time are input to the control unit 23. be done. Therefore, the control unit 23 can grasp whether or not the train 13 will arrive at the predetermined position P at the scheduled arrival time.

Here, when the train 13 arrives at the predetermined position P at the scheduled arrival time, the train 13 running on the track 11 can be easily identified based on the operation information. On the other hand, if the train 13 does not arrive at the predetermined position P at the scheduled arrival time, the train 13 arriving at the predetermined position P may be different from the train 13 identified based on the operation information. cannot identify the train 13 running on the

In this regard, the controller 23 identifies the train running on the track 11 based on the ID read by the reader 21 when it is input that the train 13 will not arrive at the predetermined position P at the scheduled arrival time. Therefore, even if the train running on the track 11 cannot be identified based on the operation information, the train running on the track 11 can be identified based on the ID read by the reader 21 .

When the train 13 arrives at the predetermined position P at the scheduled arrival time, the train running on the track 11 is identified based on the operation information, and the train runs on the track 11 based on the ID read by the reader 21. Identifying the train may be performed together. Then, the identification result may be determined on the condition that those identification results match each other. Alternatively, if the identification results do not match, one identification result may be prioritized.

- The area sensor 22 can also be installed at a predetermined distance before the reader 21 in the traveling direction of the vehicle. In this case, the control unit 23 causes the reader 21 to start transmitting radio waves after a predetermined period of time has elapsed since the area sensor 22 measured the distance from itself to the train running on the track 11. ) IDs may be read, and trains running on the track 11 may be identified based on the IDs read by the reader 21 .

According to this configuration, when the area sensor 22 measures the distance from itself to the train running on the track 11, that is, when the head of the train running on the track 11 enters the readable range of the area sensor 22, a predetermined distance is detected. After the elapse of time, the reader 21 can start transmitting radio waves (transmitting radio waves) to read the ID. The prescribed time is set based on the prescribed distance and the standard speed of the train 13 . Therefore, the ID can be easily read in a state in which the radio waves directed to the train 17 are blocked by the train 13, and the train 17 running on the track 15 is prevented from being erroneously determined to be the train 13 running on the track 11. - 特許庁can be done. In addition, in the above configuration, a line sensor 122 can be employed in place of the area sensor 22, as shown in FIG. The line sensor 122 irradiates, for example, a laser beam toward a position through which the train 13 traveling on the track 11 passes, and measures the distance to the object based on the reflected light reflected by the object.

Furthermore, the control unit 23 may input the speed from the train 13 running on the track 11 or detect the speed with a speed sensor, and set the predetermined time based on the speed. According to such a configuration, it is possible to appropriately set the timing for causing the reader 21 to start transmitting radio waves (transmitting radio waves) to read the ID according to the speed of the train running on the track 11 .

- The tags 31 and 32 may be attached to a plurality of cars of the train 13, respectively. Then, the control unit 23 may identify the train running on the track 11 based on the IDs of the tags 31 and 32 of the multiple vehicles read by the reader 21 . According to such a configuration, a train running on the track 11 can be more carefully identified based on the read IDs of the tags 31 and 32 of the vehicles.

- As shown in FIG. 6, the platform 112 may always be provided on one side of the track 111 . In this case, the ID of the tag 131 of the train 113 can be read by the reader 21 by attaching the tag 131 to only one side of the train 113 . However, even in this case, if the train switches back using the switching line 114 , the reader 21 may mistakenly read the ID of the tag 135 of the train 117 running on the adjacent track 115 . Therefore, the control unit 23 determines that the train 13 exists at the predetermined position P based on the distance measured by the area sensor 22, and on the condition that the ID is read by the reader 21, the reader 21 It is effective to identify the train running on the track 11 based on the read ID. Note that the tag 131 can also be attached to the center in the lateral direction of the train.

DESCRIPTION OF SYMBOLS 11... Track, 13... Train, 15... Track, 17... Train, 20... Train identification system, 21... Reader (reading unit), 22... Area sensor (distance measuring unit), 23... Control unit (identifying unit), 25 Reader (reading unit) 31 Tag (IC tag) 32 Tag (IC tag) 35 Tag (IC tag) 36 Tag (IC tag) 111 Track 113 Train 115 Track , 117... train, 122... line sensor (distance measuring unit), 131... tag (IC tag), 135... tag (IC tag).

Claims (8)

A train identification system for identifying trains running on a target track,
an IC tag that is attached to a train and transmits identification information of the train based on the energy of the received radio wave;
a reading unit that transmits the radio wave toward a predetermined position through which the train running on the target track passes, receives and reads the identification information transmitted by the IC tag;
a distance measuring unit that irradiates an electromagnetic wave different from the radio wave toward the predetermined position and measures the distance from itself to the object based on the electromagnetic wave reflected by the object;
It is determined that the train exists at the predetermined position based on the distance measured by the distance measuring unit, and the identification information is read by the reading unit. an identification unit that identifies a train running on the target line based on the identification information;
train identification system. The identification unit causes the reading unit to transmit the radio wave to obtain the identification information on the condition that the train is present at the predetermined position based on the distance measured by the distance measurement unit. 2. The train identification system according to claim 1, wherein a train running on said target track is identified based on said identification information read by said reading unit. A train identification system for identifying trains running on a target track,
an IC tag that is attached to a train and transmits identification information of the train based on the energy of the received radio wave;
a reading unit that transmits the radio wave toward a predetermined position through which the train running on the target track passes, receives and reads the identification information transmitted by the IC tag;
a distance measuring unit that irradiates an electromagnetic wave different from the radio wave toward the predetermined position and measures the distance from itself to the object based on the electromagnetic wave reflected by the object;
On the condition that it is determined that the train is present at the predetermined position based on the distance measured by the distance measuring unit, causing the reading unit to transmit the radio wave to read the identification information, and an identification unit that identifies a train running on the target track based on the identification information read by the unit;
train identification system. The distance measuring unit further measures the size of the object,
4. The identification unit according to any one of claims 1 to 3, wherein the identification unit determines whether or not a train is present at the predetermined position based on the distance and the size measured by the distance measurement unit. train identification system. Operation information including the estimated arrival time and identification information of a train arriving at the predetermined position and whether or not the train will arrive at the predetermined position at the estimated arrival time are input to the identification unit,
The identifying unit identifies the train running on the target track based on the input operation information when it is input that the train will arrive at the predetermined position at the scheduled arrival time, and The train running on the target track is identified based on the identification information read by the reading unit when it is input that the train does not arrive at the scheduled time. train identification system. The identification unit causes the reading unit to transmit the radio waves to read the identification information after a predetermined time has elapsed since the distance from itself to the train running on the target line was measured by the distance measurement unit, 2. The train identification system according to claim 1, wherein a train running on said target track is identified based on said identification information read by said reading unit. 7. The train identification system according to claim 6, wherein said identification unit sets said predetermined time based on the speed of a train running on said target line. The IC tags are respectively attached to a plurality of cars of the train,
The train according to any one of claims 1 to 7, wherein the identification unit identifies a train running on the target track based on the identification information of the plurality of IC tags read by the reading unit. identification system.

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