Onboard device of train and platform door control system including the same

Abstract

To provide an on-vehicle device of a train and a platform door control system including the same, capable of comparatively easily coping with a change in a position of a platform door, while restraining labor and cost.SOLUTION: An in-vehicle device 1 of a train constitutes a platform door control system and includes a speed / distance calculation unit 11 that calculates a speed and a moving distance of the train, an information acquisition unit 12 that acquires, from a ground marker 60, distance information to a train stop position of a station and door opening direction information indicating a direction of a train door to be opened at the station, and a door control unit 15 that permits a door of the train corresponding to the door opening direction information to be opened when it is determined that the train has stopped in a door controllable range of the station based on the speed of the train and the moving distance from the ground marker.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an on-board device for a train and a platform door control system including the same. [Background technology]

[0002] The direction in which the doors of a train should open at a station (door opening direction) is determined by the platform (hereinafter simply referred to as "platform") at which the train arrives at the station. Therefore, conventionally, when a train arrives at a station platform, the door opening direction is sent from the ground to the train's on-board equipment, and a door opening command is sent from the station ground coil installed at a predetermined position at the station to the train's on-board equipment. The train's on-board equipment then receives the door opening command sent from the station ground coil via the on-board coil (antenna), and the train doors open according to the door opening direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-182120 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described conventional configuration, in order to open the train doors, the train's on-board equipment must receive a door-open command sent from the station on-board device via the on-board device (antenna). In other words, the range over which the train doors can be controlled (door controllable range) is essentially determined by the range over which information can be exchanged between the station on-board device and the train's on-board device (antenna) (response range). In such a conventional configuration, if the position of the platform doors installed on a station platform is changed, for example, it is necessary to add a new station on-board device or relocate the existing station on-board device to address this, which requires time and cost.

[0005] The present invention aims to provide an on-board train device and a platform door control system including the same that can relatively easily accommodate changes to the position of platform doors while reducing effort and costs. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a novel on-board device for a train, the on-board device including: a calculation unit that calculates the speed and travel distance of the train; an acquisition unit that acquires, from a ground marker, information on the distance to a train stop position at a station and door opening direction information indicating the direction in which the train doors should open at the station; and a door control unit that permits the train doors to open in accordance with the door opening direction information when it is determined that the train has stopped within a door controllable range at the station based on the speed of the train and the travel distance from the ground marker.

[0007] According to another aspect of the present invention, a novel platform door control system is provided. The provided platform door control system includes an on-board device for a train and a platform door control device that controls platform doors installed at a station. The on-board device is configured to calculate the speed and travel distance of the train, acquire from a wayside marker information about the distance to a train stopping position at the station and door opening direction information indicating the direction in which the train doors should open at the station, and, when it determines that the train has stopped within a door controllable range of the station based on the train speed and the travel distance from the wayside marker and receives a train door opening command, output a platform door opening command to the platform door control device and open the train doors in accordance with the door opening direction information, and the platform door control device is configured to open the platform doors based on the platform door opening command. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide on-board train equipment and a platform door control system including the same that can relatively easily handle changes to the position of platform doors while reducing effort and costs. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing a schematic configuration of a train equipped with an on-board device according to an embodiment. [Figure 2] 2 is a block diagram showing an example of the functional configuration of an on-board device according to an embodiment; FIG. [Figure 3] FIG. 2 is a diagram showing an example of station facilities on a track on which the train runs. [Figure 4] FIG. 2 is a diagram showing a state before a train enters a station on the track. [Figure 5] FIG. 10 is a diagram showing a state in which the train has moved until the on-board coil of the train is positioned above a ground marker. [Figure 6] FIG. 10 is a diagram showing the state in which the train has arrived at the platform of the station. [Figure 7] This is a diagram showing the train doors and platform doors installed on the platform in an open state. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0011] [train] FIG. 1 is a diagram showing a schematic configuration of a train T equipped with an on-board device 1 according to one embodiment of the present invention. The train T is a type of vehicle that travels on a predetermined travel path R (e.g., a travel rail). At least one door TD (two in this case) is provided on each of the left and right sides of the train T. Although not particularly limited, in this embodiment, the door TD is a double-opening door. The on-board device 1 of the train T is configured to be able to control the running state of the train T and to control (open / close) the door TD of the train T at stations on the travel path R. In addition to the on-board device 1, the train T is also equipped with a tachometer generator 2, an on-board coil 3, a drive unit 4, a braking unit 5, an on-board radio 6, and the like.

[0012] The tachometer generator 2 is attached to the axle of the train T. The tachometer generator 2 outputs a signal corresponding to the rotation speed of the axle of the train T. The output signal of the tachometer generator 2 is used to calculate the speed and travel distance of the train T. The output signal of the tachometer generator 2 is sent to the on-board device 1.

[0013] The on-board coil 3 is attached to the bottom of the train T, preferably to the front bottom of the train T. The on-board coil 3 receives beside information transmitted from the beside coil G installed on the running path R when passing above it. The beside coil information of the beside coil G received by the on-board coil 3 is sent to the on-board device 1. Here, only one beside coil G is shown in FIG. 1. However, in reality, multiple beside coils G are installed along the running path R. Furthermore, the beside coil information of the beside coil G may include a beside coil ID, which is identification information of the beside coil G, and various information according to the location where the beside coil G is installed.

[0014] The drive unit 4 includes an electric motor and an internal combustion engine (diesel engine) that serve as the power source of the train T. The drive unit 4 controls the driving force applied to the axles of the train T in accordance with a control command given from the on-board device 1.

[0015] The braking device 5 includes a service brake and an emergency brake. The service brake is a brake that is normally used to slow down and / or stop the train T. The emergency brake is a brake that is used when it is necessary to urgently stop the train T. The braking device 5 controls the braking force of the service brake applied to the axles or wheels of the train T, or activates the emergency brake, in accordance with a control command given from the on-board device 1.

[0016] The on-board radio 6 is connected to the on-board device 1. The on-board radio 6 is capable of wireless communication with a predetermined radio on the ground side (for example, a station radio 54 described later).

[0017] [Train onboard equipment] 2 is a block diagram showing an example of the functional configuration of the on-board device 1 of the train T. In this embodiment, the on-board device 1 includes a speed / distance calculation unit 11, an information acquisition unit 12, a storage unit 13, a traveling control unit 14, and a door control unit 15.

[0018] The speed / distance calculation unit 11 calculates the speed and travel distance of the train T based on the output signal of the tachograph 2. The calculation results of the speed / distance calculation unit 11 are sent to the running control unit 14 and the door control unit 15.

[0019] The information acquisition unit 12 acquires the bend coil information of the bend coil G received by the on-board coil 3. In other words, the information acquisition unit 12 acquires the bend coil information from the bend coil G via the on-board coil 3. The bend coil information of the bend coil G acquired by the information acquisition unit 12 is sent to the running control unit 14 and the door control unit 15.

[0020] The memory unit 13 stores information about the train T, information about the traveling path R, and information about each station on the traveling path R. The information about the train T includes the characteristics of the drive unit 4 and the braking unit 5. The information about the traveling path R includes the position of the ground coil G (for example, the position associated with the ground coil ID) and the allowable upper limit speed for each section on the traveling path R. The information about each station on the traveling path R includes the allowable range for the train stop position TSP (described later) at each station. Although not particularly limited, the allowable range can be set in a range from several tens of centimeters to several meters before and after the train stop position TSP. The allowable range may be set only in front of or only behind the train stop position TSP. Furthermore, the allowable range can be set to a different range for each station.

[0021] The running control unit 14 determines the speed and position of the train T based on the calculation results of the speed / distance calculation unit 11 and the ground coil information of the ground coil G acquired by the information acquisition unit 12. The position of the train T is obtained from the position of the ground coil G and the distance traveled by the train T from there. The running control unit 14 also generates a pattern to control the running of the train T. Specifically, in this embodiment, the running control unit 14 is configured to generate a pattern based on the ground coil information of the ground coil G and information stored in the memory unit 13, and to control the running of the train T based on the generated pattern. The generated pattern indicates the speed of the train T relative to the position of the train T. Although not particularly limited, the generated pattern includes an operation pattern indicating a target speed of the train T according to the position of the train T and a stop pattern for stopping the train T at a predetermined position in the station. The running control unit 14 is configured to accelerate, run at a constant speed, coast, decelerate, or stop the train T so that the train T follows the pattern by appropriately issuing control commands to the drive unit 4 and / or the braking unit 5.

[0022] Similar to the running control unit 14, the door control unit 15 grasps the speed and position of the train T (the distance traveled by the train T from the position of the ground coil G) based on the calculation results of the speed / distance calculation unit 11 and the ground coil information of the ground coil G acquired by the information acquisition unit 12. The door control unit 15 also controls the doors TD of the train T at each station on the running route R. Specifically, the door control unit 15 is configured to open the left door TD of the train T, the right door TD of the train T, or both the left and right doors TD of the train T when the train T stops at a station, and to close the open doors TD when the train T departs the station. Furthermore, the door control unit 15 is configured to transmit commands and information to the ground side via the on-board radio 6 and to receive commands and information transmitted from the predetermined radio on the ground side (for example, the station radio 54 described later).

[0023] [Station facilities] FIG. 3 is a diagram (plan view) showing an example of facilities at a station 50 on a running track R. In this embodiment, the station 50 is provided with a platform 51 where trains T depart and arrive, and where passengers board and disembark train T. A plurality of (here, two) platform doors 52 are installed on the platform 51. Although not particularly limited, in this embodiment, the platform doors 52 are double-opening doors, similar to the doors TD of the train T. The station 50 is also provided with a platform door control device 53, a station radio 54, a train stop position detection device 55, and the like.

[0024] The platform door control device 53 controls (opens and closes) the multiple platform doors 52. Specifically, the platform door control device 53 is configured to open the multiple platform doors 52 when the train T arrives at the platform 51, and to close the multiple platform doors 52 before the train T departs from the platform 51. Here, "opening (closing) the multiple platform doors 52" includes opening (closing) all of the multiple platform doors 52 and opening (closing) some of the multiple platform doors 52.

[0025] The station radio 54 is connected to the platform door control device 53. The station radio 54 is capable of wireless communication with the on-board radio 6 of the train T.

[0026] The train stop position detection device 55 is configured to detect the position (for example, the leading position) of the train T that has stopped at the station 50. The detection result of the train stop position detection device 55 is sent to the platform door control device 53.

[0027] In this embodiment, a ground marker 60 is installed at a point on the travel path R, which is before the platform 51 of the station 50 as viewed from the train T. The ground marker 60 is configured to provide the train T with distance information to the train stop position TSP of the station 50 and door opening direction information indicating the direction in which the train doors should open at the station 50. In other words, the ground marker 60 is configured to provide the train T that is about to stop at the station 50 with information indicating the distance D between the ground marker 60 and the train stop position TSP of the station 50 and information indicating whether the door that will open when the train T arrives at the platform 51 of the station 50 is the left door TD, the right door TD, or both the left and right doors TD.

[0028] In this embodiment, the wayside marker 60 is a ground coil G, i.e., one of a plurality of ground coils G installed on the running track R. Therefore, when the on-board coil 3 of the train T passes above the wayside marker 60, the on-board coil 3 of the train T receives, from the wayside marker 60, identification information of the wayside marker 60, distance information to the train stop position TSP of the station 50, and door opening direction information indicating the direction in which the train doors should open at the station 50. In other words, the information acquisition unit 12 of the on-board device 1 can acquire the identification information of the wayside marker 60, the distance information, and the door opening direction information from the wayside marker 60 via the on-board coil 3 before the train T enters the station 50. Furthermore, in this embodiment, the position where the on-board coil 3 of the train T should be located when the train T arrives at the platform 51 of the station 50, that is, when the train T stops at the station 50 (the target position of the on-board coil 3) is set as the train stop position TSP of the station 50. In other words, the position where a station ground coil (so-called P0 ground coil) for linking the doors TD of the train T with the platform doors 52 of the station 50 should be installed in the prior art is set as the train stop position TSP of the station 50.

[0029] [Platform door control system] In this embodiment, a platform door control system that opens and closes the doors TD of the train T and the platform doors 52 of the station 50 in conjunction with each other is mainly composed of the on-board device 1 of the train T and the platform door control device 53 of the station 50. This will be explained below.

[0030] Fig. 4 shows the state of train T before it enters station 50. In Fig. 4, the running control unit 14 of the on-board device 1 of train T controls the running state of train T based on the stop pattern, and train T moves toward station 50 (platform 51 where it is to arrive) while decelerating in order to stop at train stop position TSP of station 50.

[0031] FIG. 5 shows a state in which train T has moved until its on-board terminal 3 is positioned above a wayside marker 60. In FIG. 5, the information acquisition unit 12 of the on-board equipment 1 of train T acquires distance information from the wayside marker 60 to the train stop position TSP at station 50 via the on-board terminal 3 and door opening direction information indicating the direction in which the train doors should open at station 50. Here, the acquired door opening direction information indicates that the train doors should open to the right at station 50. The acquired distance information and door opening direction information are sent to the door control unit 15. Upon receiving the distance information and door opening direction information, the door control unit 15 starts monitoring the speed of train T and the distance traveled by train T from the wayside marker 60 based on the calculation results of the speed / distance calculation unit 11. The door control unit 15 also acquires an allowable range for the train stop position TSP at station 50 from the memory unit 13. The running control unit 14 of the on-board equipment 1 continues to control the running state of train T based on the stop pattern.

[0032] 6 shows a state in which train T has arrived at platform 51 of station 50, i.e., a state in which train T has stopped at station 50. When train T stops at station 50, i.e., when the speed of train T becomes zero, door control unit 15 of on-board device 1 of train T determines whether train T has stopped within the door controllable range of station 50 based on the distance traveled by train T from ground marker 60.

[0033] Specifically, the door control unit 15 determines that the train T has stopped within the door controllable range of the station 50 if the distance traveled by the train T from the ground marker 60 when the speed of the train T becomes zero is equal to the distance D indicated by the distance information to the train stop position TSP of the station 50 or is within the allowable range. Then, when the door control unit 15 determines that the train T has stopped within the door controllable range of the station 50, it permits the door TD of the train T (here, the right door TD) to be opened in accordance with the door opening direction information.

[0034] Furthermore, the platform door control device 53 determines whether or not the train T has stopped at a predetermined position based on the detection result of the train stop position detection device 55. Then, when the platform door control device 53 determines that the train T has stopped at the predetermined position, it permits the opening of a plurality of platform doors 52 installed at the station 50.

[0035] FIG. 7 shows a state in which the door TD of train T and the platform doors 52 installed at station 50 are open. The door control unit 15 permits the door TD of train T to be opened in accordance with the door opening direction information, and upon receiving a train door open command, opens the door TD of train T (here, the right door TD) in accordance with the door opening direction information. At that time, the door control unit 15 also transmits a platform door open command to the platform door control device 53 via the on-board radio 6. In other words, when the door control unit 15 determines that train T has stopped within a door controllable range of the station 50 and receives a train door open command, it is configured to transmit a platform door open command to the platform door control device 53 and open the door TD of train T in accordance with the door opening direction information.

[0036] Here, although not particularly limited, the train door open command may be based on a switch operation by a crew member or the like of the train T to open the door TD of the train T. And / or the train door open command may be transmitted via the station radio 54 by the platform door control device 53 that has determined that the train T has stopped at the predetermined position, and received by the on-board radio 6 of the train T.

[0037] The platform door opening command transmitted from the door control unit 15 via the on-board radio 6 is received by the station radio 54, and the platform door control device 53 opens multiple platform doors 52 based on the received platform door opening command.

[0038] In this way, when train T arrives at platform 51 of station 50, door TD of train T and platform door 52 installed on platform 51 of station 50 are opened in conjunction with each other.

[0039] Furthermore, when train T departs from platform 51 of station 50, the door control unit 15 receives a train door close command and closes the open doors TD of train T. At that time, the door control unit 15 also transmits a platform door close command to the platform door control device 53 via the on-board radio 6. Although not particularly limited, the train door close command may be based on a switch operation for closing the doors TD of train T by a crew member or the like of train T. And / or, the train door close command may be transmitted via the station radio 54 from the platform door control device 53 or another station device (not shown) when the departure permission conditions for train T are met, and received by the on-board radio 6 of train T.

[0040] The platform door close command transmitted from the door control unit 15 via the onboard radio 6 is received by the station radio 54, and the platform door control device 53 closes the multiple open platform doors 52 based on the received platform door close command.

[0041] In this way, when train T departs from platform 51 of station 50, door TD of train T and platform door 52 installed on platform 51 of station 50 are closed in conjunction with each other.

[0042] According to the on-board device 1 of the train T according to the embodiment, for example, the following effects can be obtained.

[0043] In the above-described embodiment, the on-board equipment 1 of the train T includes a speed / distance calculation unit 11 that calculates the speed of the train T and the distance traveled by the train T, an information acquisition unit 12 that acquires, from a ground marker 60, distance information to the train stop position TSP at the station 50 and door opening direction information indicating the direction in which the train doors should open at the station 50, and a door control unit 15 that allows the doors TD of the train T to be opened in accordance with the door opening direction information when it is determined that the train T has stopped within the door controllable range of the station 50 based on the speed of the train T and the distance traveled by the train T from the ground marker 60.

[0044] Therefore, for example, even if the position of the platform doors 52 installed on the platform 51 of the station 50 is changed and the train stop position TSP needs to be changed, it is sufficient to adjust the distance information to the train stop position TSP of the station 50 that the ground marker 60 provides to the on-board device 1 of the train T, and there is no need to add a new station on-board coil or relocate an existing station on-board coil. In other words, only software modifications are required, and no modifications to hardware such as equipment are required. Therefore, with the on-board device 1 of the train T according to the embodiment, it is possible to relatively easily deal with changes to the position of the platform doors 52 while minimizing effort and cost.

[0045] Furthermore, in the above-described embodiment, there is no reaction range (reaction distance) that may restrict the door controllable range, as exists in the prior art. Therefore, with the on-board device 1 of the train T according to the embodiment, it is possible to arbitrarily set the door controllable range. Furthermore, with the on-board device 1 of the train T according to the embodiment, it is possible to vary the door controllable range for each station and / or each train, and it is also easy to reset (change) the door controllable range.

[0046] Furthermore, in the above-described embodiment, the door control unit 15 is configured to open the doors TD of the train T according to the door opening direction information when it determines that the train T has stopped within the door controllable range of the station 50 and receives a train door open command. In other words, even when the door control unit 15 receives a train door open command, the door control unit 15 does not open the doors TD of the train T unless the train T has stopped within the door controllable range of the station 50. This prevents the doors TD of the train T from opening when the train T is stopped in an inappropriate position, thereby ensuring the safety of passengers on the train T.

[0047] Furthermore, when the door control unit 15 determines that the train T has stopped within the door controllable range of the station 50 and receives a train door open command, it is configured to transmit a platform door open command to the platform door control device 53 via the on-board radio 6 and open the doors TD of the train T in accordance with the door opening direction information. Therefore, it may be possible to open the doors TD of the train T and the platform doors 52 of the station 50 in conjunction with each other while ensuring the safety of passengers on the train T.

[0048] Furthermore, in the above-described embodiment, the ground marker 60 is installed in front of the platform 51 of the station 50 as seen from the train T, that is, in front of the platform 51 at which the train T arrives at the station 50. This makes it possible to easily and flexibly deal with changes in the position of the platform doors 52 on the platform 51 of the station 50, etc.

[0049] In the above-described embodiment, the ground marker 60 is a ground coil G, and when the on-board coil 3 of the train T is located above the ground marker 60, the information acquisition unit 12 acquires, via the on-board coil 3, distance information from the ground marker 60 to the train stop position TSP of the station 50 and door opening direction information indicating the direction in which the train doors should open at the station 50. Here, the target position of the on-board coil 3 where the on-board coil 3 should be located when the train T arrives at the platform 51 of the station 50, i.e., when the train T stops at the station 50, is set as the train stop position TSP of the station 50. The door control unit 15 is configured to determine that the train T has stopped within the door controllable range if the movement distance of the train T from the ground marker 60 when the train T stops at the station 50 is equal to the distance indicated by the distance information or within an allowable range. Therefore, it is possible to easily and stably determine whether the train T has stopped within the door controllable range, and the door controllable range can be easily adjusted by changing the allowable range.

[0050] [Variations] In the above-described embodiment, the wayside marker 60 is installed in front of the platform 51 where the train T arrives at the station 50 as viewed from the train T. However, this is not limited to this. The wayside marker 60 may be installed at any point on the running track R as viewed from the train T as being in front of the train stop position TSP. For example, the wayside marker 60 may be installed near the entrance to the platform 51 where the train T arrives at the station 50, or may be installed in front of the station 50 as viewed from the train T.

[0051] In the above-described embodiment, the ground coil G is used as the ground marker 60. However, this is not limiting. The ground marker 60 may be configured to provide the train T with distance information to the train stop position TSP in the station 50 and door opening direction information indicating the direction in which the train doors should open at the station 50. In this case, the train T is further provided with a receiver that receives information from the ground marker 60 at a specific point on the running path R. The information acquisition unit 12 may be configured to acquire, at the specific point on the running path R, distance information from the ground marker to the train stop position TSP in the station 50 and door opening direction information indicating the direction in which the train doors should open at the station 50 via the receiver of the train T.

[0052] Furthermore, in the above-described embodiment, the tolerance range for the train stop position TSP at each station is stored in the memory unit 13. However, this is not limited to this. The ground marker 60 may be configured to provide the train T with distance information to the train stop position TSP at the station 50, door opening direction information indicating the direction in which the train doors should open at the station 50, and the tolerance range for the train stop position TSP at the station 50. In other words, the tolerance range for the train stop position TSP at the station 50 may be acquired by the information acquisition unit 12 from the ground marker 60 via the on-board sensor 3, together with the distance information to the train stop position TSP at the station 50 and the door opening direction information indicating the direction in which the train doors should open at the station 50.

[0053] Furthermore, in the above-described embodiment, the position where the on-board terminal 3 of the train T should be located when the train T stops at the station 50 (the target position of the on-board terminal 3) is set as the train stop position TSP of the station 50. However, this is not limited to this. The front position of the train T when the train T stops at the station 50 may be set as the train stop position TSP of the station 50. In this case, the door control unit 15 may determine whether the train T has stopped within the door controllable range of the station 50, taking into account the distance between the on-board terminal 3 and the front position of the train T.

[0054] Furthermore, in the above-described embodiment, platform doors 52 are installed on platform 51 of station 50. However, this is not limited to this. Platform doors 52 do not necessarily have to be installed on platform 51 of station 50. In other words, the on-board device 1 of train T does not necessarily have to constitute a platform door control system.

[0055] The above describes some of the embodiments of the present invention and their variations. However, the present invention is not limited to the above-described embodiments and variations, and it goes without saying that further modifications and changes are possible based on the technical concept of the present invention. [Explanation of symbols]

[0056] 1...on-board device, 2...speed generator, 3...on-board coil, 4...drive device, 5...braking device, 6...on-board radio, 11...speed / distance calculation unit (calculation unit), 12...information acquisition unit (acquisition unit), 13...storage unit, 14...travel control unit, 15...door control unit, 50...station, 51...platform (home), 52...platform door, 53...platform door control device, 54...station radio, 55...train stop position detection device, 60...ground marker, R...running path, T...train, TD...train door, TSP...train stop position

Claims

1. An on-board device of a train, a calculation unit for calculating a speed and a travel distance of the train; an acquisition unit that acquires, from a ground marker, distance information to a train stop position at a station and door opening direction information indicating a direction in which the train doors should open at the station; a door control unit that permits the train doors to open in accordance with the door opening direction information when it is determined that the train has stopped within a door controllable range of the station based on the speed of the train and the distance traveled from the ground marker; On-board equipment, including

2. 2. The on-board device according to claim 1, wherein the door control unit is configured to open the train doors in accordance with the door opening direction information when it determines that the train has stopped within a door controllable range of the station and receives a train door opening command.

3. 2. The on-board device according to claim 1, wherein the door control unit is configured, when it determines that the train has stopped within a door controllable range of the station and receives a train door open command, to send a platform door open command to a platform door control device that controls platform doors installed at the station and to open the train doors in accordance with the door opening direction information.

4. 2. The on-board device according to claim 1, wherein the ground marker is installed in front of a platform where the train arrives at the station, as viewed from the train.

5. the ground marker is a ground element, the acquisition unit acquires the distance information and the door opening direction information from the ground marker via the on-board terminal when the on-board terminal of the train is located above the ground marker, the train stop position of the station includes a target position of the on-board unit where the on-board unit should be located when the train stops at the station, the door control unit determines that the train has stopped within a door controllable range of the station when a moving distance of the train from the ground marker when the train has stopped at the station is equal to a distance indicated by the distance information or is within an allowable range. The on-board device according to any one of claims 1 to 4.

6. The on-board device according to claim 5 , wherein the allowable range is acquired by the acquisition unit from the ground marker via the on-board coil together with the distance information and the door opening direction information.

7. The on-board device according to claim 5 , further comprising a storage unit in which the allowable range for each station is stored.

8. The system includes an on-board device of the train and a platform door control device that controls platform doors installed at stations, the on-board device is configured to calculate the speed and travel distance of the train, acquire from a ground marker distance information to a train stopping position at the station and door opening direction information indicating the direction in which the train doors should open at the station, determine that the train has stopped within a door controllable range of the station based on the speed of the train and the travel distance from the ground marker, and, when receiving a train door opening command, open the train doors in accordance with the door opening direction information and output a platform door opening command to the platform door control device, The platform door control device is configured to open the platform door based on the platform door opening command. Platform door control system.

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