JP7522355B2 - Train Identification System - Google Patents

Description

The present invention relates to a system for identifying trains traveling on a target track.

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

JP 2011-251672 A

When identifying trains traveling on a target track, in order to be able to identify trains traveling on the target track at high speeds (e.g., 100 km/h), it is necessary to set the reader's readable range to a certain extent. In that case, the reader's readable range may extend to the track next to the target track, and there is a risk that a train traveling on the track next to the target track may be erroneously determined to be a train traveling on the target track.

The present invention has been made to solve these problems, and its main purpose is to prevent a train identification system from erroneously determining that a train running on a track adjacent to a target track is the train running on the target track.

The first means for solving the above problem is to
A train identification system for identifying trains traveling on a target track, comprising:
An IC tag that is attached to a train and transmits train identification information based on the energy of the received radio waves;
a reader that transmits the radio waves toward a predetermined position through which a train traveling on the target track passes and 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 a distance from the object to the object based on the electromagnetic wave reflected by the object;
an identification unit that determines that a train is present at the predetermined position based on the distance measured by the distance measuring unit, and, on condition that the identification information has been read by the reading unit, identifies a train traveling on the target track based on the identification information read by the reading unit;
Equipped with.

According to the above configuration, the IC tag is attached to a train and transmits the train's identification information based on the energy of the received radio waves. The reading unit transmits the radio waves toward a predetermined position where a train running on the target track (hereinafter referred to as the "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 the train's identification information, and the reading unit reads the identification information. On the other hand, when a train passes on a track adjacent to the target track (hereinafter referred to as the "adjacent track"), there is a risk that the IC tag of the train running on the adjacent track (hereinafter referred to as the "adjacent train") will transmit the train's identification information, and the reading unit will read the identification information.

Here, the distance measurement unit irradiates electromagnetic waves different from the radio waves toward the specified position, and measures the distance from itself to the object based on the electromagnetic waves reflected by the object. Therefore, when a train is traveling on the target track, the distance measurement unit measures the distance from the distance measurement unit to the target train. On the other hand, when a train is traveling on the adjacent track, the distance measurement unit measures the distance from the distance measurement unit to the adjacent train, i.e., a distance different from the distance from the distance measurement unit to the target train. Therefore, it is possible to determine whether or not a train is present at the specified position based on the distance measured by the distance measurement unit.

Then, the identification unit determines that a train is present at the predetermined position based on the distance measured by the distance measuring unit, and identifies the train running on the target track based on the identification information read by the reading unit, provided that the identification information has been read by the reading unit. That is, if the identification unit does not determine that a train is present at the predetermined position based on the distance measured by the distance measuring unit, the identification unit does not identify the train running on the target track based on the identification information read by the reading unit. Also, the identification unit does not identify the train running on the target track even if the identification information has not been read by the reading unit. Therefore, when a train is running on the adjacent track, the identification unit can be prevented from identifying the train running on the target track based on the identification information read by the reading unit. 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 is running on the target track, the identification unit can identify the train running on the target track based on the identification information read by the reading unit.

In the second means, the identification unit, on the condition that it has determined that a train is present at the specified position based on the distance measured by the distance measuring unit, causes the reading unit to transmit the radio waves to read the identification information, and identifies the train traveling on the target track based on the identification information read by the reading unit.

The third means is
A train identification system for identifying trains traveling on a target track,
An IC tag that is attached to a train and transmits train identification information based on the energy of the received radio waves;
a reader that transmits the radio waves toward a predetermined position through which a train traveling on the target track passes and 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 a distance from the object to the object based on the electromagnetic wave reflected by the object;
an identification unit that, on condition that it is determined that a train is present at the predetermined position based on the distance measured by the distance measuring unit, causes the reading unit to transmit the radio waves to read the identification information, and identifies the train traveling on the target track based on the identification information read by the reading unit;
Equipped with.

According to the above configuration, the identification unit causes the reading unit to transmit the radio waves and read the identification information, on the condition that it has determined that a train is present at the specified position based on the distance measured by the distance measuring unit. In other words, if the identification unit has not determined that a train is present at the specified position based on the distance measured by the distance measuring unit, it does not cause the reading unit to transmit the radio waves and read the identification information. Therefore, if a train is running on the adjacent track and no train is running on the target track, the identification unit can prevent the reading unit from transmitting the radio waves and reading the identification information. Therefore, it is possible to suppress the IC tag of the adjacent train from transmitting identification information, and to suppress the reading unit from reading the identification information of the adjacent train.

On the other hand, if the identification unit determines that a train is present at the specified position based on the distance measured by the distance measuring unit, it causes the reading unit to transmit the radio waves and read the identification information. In this case, the train present at the specified position blocks the radio waves heading toward the adjacent train, which prevents the adjacent train from being irradiated with radio waves, and thus prevents a train running on the adjacent track from being erroneously determined to be a train running on the target track. The reading unit then transmits the radio waves toward the train present at the specified position and receives and reads the identification information transmitted by the IC tag. Thus, the identification unit can identify the train running on the target track.

In the fourth means, the distance measuring unit further measures the size of the object, and the identification unit determines whether or not a train is present at the specified position based on the distance and size measured by the distance measuring unit. With 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 can determine whether the object is a train or an obstacle other than a train based on the size of the object measured by the distance measuring unit. Therefore, it is possible to suppress erroneous determination that a train is present at the specified position when the electromagnetic waves irradiated from the distance measuring unit are reflected by an obstacle other than a train.

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

According to the above configuration, the identification unit receives operation information including the scheduled arrival time and identification information of the train arriving at the specified location, as well as whether or not the train will arrive at the specified location at the scheduled arrival time. Therefore, the identification unit can determine whether or not the train will arrive at the specified location at the scheduled arrival time.

Here, if a train arrives at the specified position at the scheduled arrival time, the train running on the target track can be easily identified based on the operation information. On the other hand, if a train does not arrive at the specified position at the scheduled arrival time, the train that arrives at the specified position may be different from the train identified based on the operation information, so the train running on the target track cannot be identified based on the operation information.

In this regard, when it is input that a train will not arrive at the specified position at the scheduled arrival time, the identification unit identifies the train traveling on the target track based on the identification information read by the reading unit. Therefore, even if it is not possible to identify the train traveling on the target track based on the operation information, it is possible to identify the train traveling on the target track based on the identification information read by the reading unit.

In the sixth means, the identification unit causes the reading unit to transmit the radio waves and read the identification information after a predetermined time has elapsed since the distance measurement unit measured the distance from itself to the train traveling on the target line, and identifies the train traveling on the target line based on the identification information read by the reading unit. With this configuration, the identification unit can transmit the radio waves and read the identification information after a predetermined time has elapsed since the distance measurement unit measured the distance from itself to the train traveling on the target line, that is, since the front of the train traveling on the target line entered the readable range of the distance measurement unit. Therefore, it becomes easier to read the identification information in a state where the radio waves heading to the adjacent line and the adjacent train are blocked by the target train, and it is possible to suppress erroneous determination of a train traveling on the adjacent line as a train traveling on the target line.

In the seventh aspect, the identification unit sets the predetermined time based on the speed of the train traveling on the target track. With this configuration, the timing for the reader to transmit the radio waves and read the identification information can be appropriately set according to the speed of the train traveling on the target track.

In the eighth means, the IC tag is attached to each of the multiple cars of the train, and the identification unit identifies the train running on the target track based on the identification information of the multiple IC tags read by the reading unit. With this configuration, it is possible to more carefully identify the train running on the target track based on the identification information of the multiple IC tags that are read.

Schematic diagram of the train identification system. FIG. 4 is a schematic diagram showing a manner in which a reader transmits radio waves. FIG. 13 is a schematic diagram showing a manner in which the ID of an adjacent train is erroneously read. 4 is a flowchart showing a procedure for train identification. FIG. 13 is a schematic diagram showing a modified example of the train identification system. FIG. 13 is a schematic diagram showing another manner in which the ID of an adjacent train is erroneously read.

One embodiment will be described below with reference to the drawings. This embodiment is embodied as a train identification system that identifies 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 the track 11. The platform 12 is provided at a specified distance from the track 11.

The train identification system 20 includes tags 31, 32, a reader 21, an area sensor 22, a control unit 23, etc.

The tags 31 and 32 (IC tags) are passive RF (Radio Frequency) tags equipped with an antenna, IC, memory, etc. 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 when they receive radio waves from the reader 21, they transmit radio waves including the ID (identification information) of the train 13 stored in the memory. The ID is a number unique to each train. The tag 31 (first IC tag) is attached to the right side (right part) of the train 13. The tag 32 (second IC tag) is attached to the left side (left part) 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 in which 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.

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

The reader 21 needs to read the ID transmitted by the tag 31 before the train 13 stops. Also, for trains 13 that do not stop at the platform 12, it is necessary to read the ID of the tag 31 of trains 13 passing by at high speed. For this reason, the readable range of the reader 21 is set to a relatively wide range. For example, to correctly read the ID of the tag 31 of a train 13 traveling at 100 km/h, the radius of the readable range needs to be set to 10 to 12 m.

Because of the above circumstances, the readable range is set to a relatively wide range, and the following problem occurs when there is a track 15 parallel to the track 11 as shown in FIG. 3. That is, there is a risk that the radio waves transmitted by the reader 21 will reach the tag 36 of the train 17 traveling on the track 15, and the tag 36 will return the ID of the train 17. In this case, the reader 21 may mistakenly identify the train corresponding to the ID transmitted by the tag 36 as a train traveling at a predetermined position P on the track 11. The same problem may also occur when the ID of the tag 35 is read by a reader 25 installed on a platform 16 adjacent to the track 15.

As shown in Figs. 1 and 2, the train identification system 20 includes an area sensor 22. The area sensor 22 (distance measurement unit) detects an object that has entered a preset area A. It is desirable that the area A is set so that it can detect an object at the above-mentioned predetermined position P, but does not detect a train 17 traveling on the adjacent track 15. The area sensor 22, for example, irradiates a laser beam (electromagnetic wave) horizontally at each predetermined angle, measures the distance from itself to the object based on the time it takes for the beam to be reflected by the object and return (detects the object), and identifies the direction of the object based on the irradiation angle (irradiation direction) of the laser beam. 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 control unit 23, and the measurement results by the area sensor 22 are input to the control unit 23.

The control unit 23 (identification unit) is composed of a microcomputer equipped with a CPU, ROM, RAM, an input/output interface, etc. The control unit 23 determines that a train is present at a predetermined position P based on the distance measured by the area sensor 22, and identifies the train running on the track 11 based on the ID read by the reader 21, provided that the ID has been read by the reader 21.

Figure 4 is a flowchart showing the procedure for train identification. This series of processes is executed by the control unit 23.

First, it is determined whether the area sensor 22 has detected an object (S10). If it is determined that the area sensor 22 has not detected an object (S10: NO), the process is repeated from S10.

On the other hand, if it is determined in the judgment of S10 that the area sensor 22 has detected an object (S10: YES), it is determined whether or not the position and size of the object are correct for a train 13 (S11). Specifically, if the measured position (distance to the object) and size of the object correspond to the position and size of a train 13 passing through the specified position P, it is determined that the position and size of the object are correct for a train 13. On the other hand, if the measured position of the object is significantly deviated from the specified position P (for example, if the measured position of the object corresponds to the position of a train running on the adjacent track 15), or if the measured size of the object is clearly smaller than the train 13 (for example, if a bird has crossed), it is determined that the position and size of the object are incorrect for a train 13. If it is determined in this judgment that the position and size of the object are incorrect for a train 13 (S11: NO), the process is executed again from S10.

On the other hand, if it is determined that the position and size of the object are correct for a train 13 (S11: YES), the reader 21 starts reading the ID (S12). Specifically, the reader 21 starts transmitting radio waves toward the specified position P, and reads the ID when it receives radio waves including the ID. That is, on the condition that it is determined that a train is present at the specified position P based on the distance measured by the area sensor 22, the reader 21 transmits radio waves to read the ID. The train is then identified from the read ID (S13). Specifically, the train running at the specified position P on the track 11 at the current time is identified as the train corresponding to the read ID.

Then, it is determined whether the area sensor 22 has not detected an object, has detected a train stop signal, or has detected a train departing from the platform 12 (S14). If the result of this determination is negative (S14: NO), the process is repeated from S13.

On the other hand, if either of the judgments in S14 is positive (S14: YES), the ID reading by the reader 21 is terminated (S15). Specifically, the transmission of radio waves by the reader 21 toward the specified position P is terminated. In other words, if the train has stopped at the platform 12 or has departed from the platform 12, the period for identifying the train has ended, and the ID reading by the reader 21 is terminated. After that, this series of processes is terminated (END).

The present embodiment described above has the following advantages:

- The area sensor 22 emits a laser light, 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 light reflected by the object. Therefore, when a train 13 is traveling 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 a train 17 is traveling on the track 15, the area sensor 22 measures the distance from the area sensor 22 to the train 17, i.e., a distance different from the distance from the area sensor 22 to the train 13. Therefore, it is possible to determine whether or not a train 13 is present at the predetermined position P based on the distance measured by the area sensor 22.

- The control unit 23 determines that the train 13 is present at the predetermined position P based on the distance measured by the area sensor 22, and identifies the train running on the track 11 based on the ID read by the reader 21, provided that the ID has been read by the reader 21. 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 does not identify the train running on the track 11 based on the ID read by the reader 21. Therefore, when the train 17 is running on the track 15, the control unit 23 can prevent the train 13 running on the track 11 from being identified based on the ID read by the reader 21. Therefore, in the train 13 identification system, it is possible to suppress erroneous determination that the train 17 running on the track 15 is the train 13 running on the track 11. On the other hand, when a train is running on the track 11, the control unit 23 can identify the train 13 running on the track 11 based on the ID read by the reader 21.

- The control unit 23 causes the reader 21 to transmit radio waves and read the ID, on the condition that it has determined that a train is present at the specified position P based on the distance measured by the area sensor 22. In other words, if the control unit 23 has not determined that a train is present at the specified position P based on the distance measured by the area sensor 22, it does not cause the reader 21 to transmit radio waves and read the ID. Therefore, if a train 17 is running on the track 15 and a train 13 is not running on the track 11, the control unit 23 can prevent the reader 21 from transmitting radio waves and reading the ID. Therefore, it is possible to prevent the tag 36 of the train 17 from transmitting the ID, and to prevent the reader 21 from reading the ID of the train 17.

- When the control unit 23 determines that a train is present at the specified position P based on the distance measured by the area sensor 22, it causes the reader 21 to transmit radio waves and read the ID. In this case, the train at the specified position P blocks the radio waves heading toward the train 17, so it is possible to prevent the train 17 from being irradiated with radio waves, and thus to prevent the train 17 traveling on the track 15 from being mistakenly determined to be the train 13 traveling on the track 11. The reader 21 can then transmit radio waves toward the train at the specified position P and receive and read the ID transmitted by the tag 31. Therefore, the control unit 23 can identify the train 13 traveling on the track 11.

- The area sensor 22 further measures the size of the object, and the control unit 23 determines whether or not a train 13 is present at the specified position P based on the position (distance) and size measured by the area sensor 22. With this configuration, when the distance from the area sensor 22 to an object is measured based on the laser light reflected by the object, the control unit 23 can determine whether the object is a train or an obstacle other than a train based on the size of the object measured by the area sensor 22. Therefore, when the laser light irradiated from the area sensor 22 is reflected by an obstacle other than a train, it is possible to prevent the erroneous determination that a train is present at the specified position P.

- It is also possible to configure the reader 21 to transmit radio waves from above the train to read the ID of the tag. However, since there is no structure above the train to support the reader 21, it is difficult to install the reader 21 above the train. In addition, electric wires are placed above the train, and pantographs are often installed on the top of the train, which also makes it difficult to install the reader 21 above the train. Therefore, it is necessary to install the reader 21 on the side of the train, such as on the platform 12, and this embodiment is significant in that it can suppress the misidentification of the train that occurs in such cases.

- In order to detect people entering the tracks, area sensors are often installed in advance on the platform 12. Therefore, the train identification system 20 can also use an area sensor that has been set up in advance on the platform to determine whether or not a train is present at a specified position P.

The above embodiment can be modified as follows. The same parts as those in the above embodiment are designated by the same reference numerals and will not be described.

- In the flowchart of FIG. 4, the order of the processes of S10 to S12 may be changed. Even in this case, the control unit 23 will identify the train traveling on the track 11 based on the ID read by the reader 21, provided that the area sensor 22 detects an object and the position and size of the detected object are correct for a train 13, i.e., that a train is determined to be present at the specified position P.

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

- In general, the control unit 23 receives operation information including the scheduled arrival time and ID of the train 13 arriving at the specified position P, as well as information on whether the train 13 will arrive at the specified position P at the scheduled arrival time. When it is input that the train 13 will arrive at the specified position P at the scheduled arrival time, the control unit 23 may identify the train 13 running on the track 11 based on the input operation information, and when it is input that the train 13 will not arrive at the specified position P at the scheduled arrival time, the control unit 23 may identify the train 13 running on the track 11 based on the ID read by the reader 21, as in the above embodiment.

According to the above configuration, the control unit 23 receives operation information including the scheduled arrival time and ID of the train 13 arriving at the specified position P, as well as information on whether the train 13 will arrive at the specified position P at the scheduled arrival time. Therefore, the control unit 23 can determine whether the train 13 will arrive at the specified position P at the scheduled arrival time.

Here, if train 13 arrives at the predetermined position P at the scheduled arrival time, train 13 running on track 11 can be easily identified based on the operation information. On the other hand, if train 13 does not arrive at the predetermined position P at the scheduled arrival time, train 13 running on track 11 cannot be identified based on the operation information, since there is a risk that train 13 arriving at the predetermined position P will be different from train 13 identified based on the operation information.

In this regard, when it is input that the train 13 will not arrive at the predetermined position P at the scheduled arrival time, the control unit 23 identifies the train traveling on the track 11 based on the ID read by the reader 21. Therefore, even if it is not possible to identify the train traveling on the track 11 based on the operation information, the control unit 23 can identify the train traveling on the track 11 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 traveling on the track 11 may be identified based on the operation information and the train traveling on the track 11 may be identified based on the ID read by the reader 21. The identification result may then be confirmed on the condition that the identification results match. Alternatively, if the identification results do not match, one of the identification results may be given priority.

- The area sensor 22 may be installed a predetermined distance ahead of the reader 21 in the direction of travel of the vehicle. In this case, the control unit 23 may cause the reader 21 to start transmitting radio waves (to transmit radio waves) and read the ID after a predetermined time has elapsed since the area sensor 22 measured the distance from itself to the train traveling on the track 11, and may identify the train traveling on the track 11 based on the ID read by the reader 21.

According to this configuration, when the area sensor 22 measures the distance from itself to the train traveling on the track 11, that is, after a predetermined time has elapsed since the front of the train traveling on the track 11 entered the readable range of the area sensor 22, the reader 21 can start transmitting radio waves (transmit radio waves) to read the ID. The predetermined time is set based on the above-mentioned predetermined distance and the standard speed of the train 13. Therefore, it becomes easier to read the ID when the radio waves toward the train 17 are blocked by the train 13, and it is possible to suppress the train 17 traveling on the track 15 from being erroneously determined to be the train 13 traveling on the track 11. In the above configuration, as shown in FIG. 5, a line sensor 122 can be used instead of the area sensor 22. The line sensor 122 irradiates laser light toward a position where 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 traveling on the track 11, or may detect the speed using a speed sensor, and set the above-mentioned predetermined time based on that speed. With this configuration, the timing at which the reader 21 starts transmitting radio waves (transmits radio waves) to read the ID can be appropriately set according to the speed of the train traveling on the track 11.

- The tags 31, 32 may be attached to each of the multiple cars of the train 13. The control unit 23 may then identify the trains traveling on the track 11 based on the IDs of the tags 31, 32 of the multiple cars read by the reader 21. With this configuration, it is possible to more carefully identify the trains traveling on the track 11 based on the IDs of the tags 31, 32 of the multiple cars that have been read.

- As shown in FIG. 6, there are cases where the platform 112 is always provided on one side of the track 111. In this case, if the tag 131 is attached only to one side of the train 113, the reader 21 can read the ID of the tag 131 of the train 113. However, even in this case, when the train performs a switchback using the switching line 114, the reader 21 may erroneously read the ID of the tag 135 of the train 117 running on the adjacent track 115. Therefore, it is effective for the control unit 23 to determine that the train 13 is present at a predetermined position P based on the distance measured by the area sensor 22, and, provided that the ID has been read by the reader 21, to identify the train running on the track 11 based on the ID read by the reader 21. The tag 131 can also be attached to the center of the train in the left-right direction.

11...railroad tracks, 13...train, 15...railroad tracks, 17...train, 20...train identification system, 21...reader (reading unit), 22...area sensor (distance measuring unit), 23...control unit (identification unit), 25...reader (reading unit), 31...tag (IC tag), 32...tag (IC tag), 35...tag (IC tag), 36...tag (IC tag), 111...railroad tracks, 113...train, 115...railroad tracks, 117...train, 122...line sensor (distance measuring unit), 131...tag (IC tag), 135...tag (IC tag).

Claims (5)

A train identification system for identifying trains traveling on a target track,
An IC tag that is attached to a train and transmits train identification information based on the energy of the received radio waves;
a reader that transmits the radio waves toward a predetermined position through which a train traveling on the target track passes and 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 a distance from the object to the object based on the electromagnetic wave reflected by the object;
an identification unit that determines that a train is present at the predetermined position based on the distance measured by the distance measuring unit, and, on condition that the identification information has been read by the reading unit, identifies a train running on the target track based on the identification information read by the reading unit;
Equipped with
The identification unit receives operation information including a scheduled arrival time and identification information of a train arriving at the predetermined position, and information as to whether the train will arrive at the predetermined position at the scheduled arrival time,
The identification unit identifies trains running on the target track based on the input operation information when it is input that a train will arrive at the specified location at the scheduled arrival time, and identifies trains running on the target track based on the identification information read by the reading unit when it is input that a train will not arrive at the specified location at the scheduled arrival time . The train identification system according to claim 1, wherein the identification unit, on the condition that it has determined that a train is present at the predetermined position based on the distance measured by the distance measuring unit, causes the reading unit to transmit the radio waves to read the identification information, and identifies the train traveling on the target track based on the identification information read by the reading unit. A train identification system for identifying trains traveling on a target track,
An IC tag that is attached to a train and transmits train identification information based on the energy of the received radio waves;
a reader that transmits the radio waves toward a predetermined position through which a train traveling on the target track passes and 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 a distance from the object to the object based on the electromagnetic wave reflected by the object;
an identification unit that, on condition that it is determined that a train is present at the predetermined position based on the distance measured by the distance measuring unit, causes the reading unit to transmit the radio waves to read the identification information, and identifies the train traveling on the target track based on the identification information read by the reading unit;
Equipped with
The identification unit receives operation information including a scheduled arrival time and identification information of a train arriving at the predetermined position, and information as to whether the train will arrive at the predetermined position at the scheduled arrival time,
The identification unit identifies trains running on the target track based on the input operation information when it is input that a train will arrive at the specified location at the scheduled arrival time, and identifies trains running on the target track based on the identification information read by the reading unit when it is input that a train will not arrive at the specified location at the scheduled arrival time . The distance measuring unit further measures the size of the object,
The train identification system according to any one of claims 1 to 3, wherein the identification unit determines whether or not a train is present at the specified position based on the distance and the size measured by the distance measuring unit. The IC tags are attached to each of the plurality of cars of the train,
The train identification system according to claim 1 , 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.

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