JP2018207687A - Automatic Train Protection System - Google Patents

Abstract

To provide an automatic train protection system capable of safely stopping a train when a problem of railroad crossing occurs.SOLUTION: An automatic train protection system comprises: an on-board device and a ground device. The ground device includes a rail transmission sender capable of sending current signal including specified information to a rail. The on-board device includes: a receiver receiving information signal contained in current by detecting magnetic field caused by current flowing in the rail; and speed detection means detecting the train speed. An on-vehicle controller reads out, when information is received from a ground element by an information reception unit, a specific protection pattern or a computing equation from a storage device and set it as a speed control target, and when the on-vehicle controller receives information related to a problem of railroad crossing by the receiver and determines that a problem of railroad crossing occurs, the on-vehicle controller gives notification of the problem of railroad crossing by a monitor device, and controls a brake device on the basis of the protection pattern and the detection signal from the speed detection means to perform a deceleration control of the train speed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic train protection system used for train security for railways, and more particularly to a technique effective for use in train protection at a railroad crossing.

Currently, train protection at railroad crossings uses laser light and infrared rays to detect objects that have entered the railroad crossing when the train trouble alarm device (emergency button) provided at the railroad crossing is pressed or when the circuit breaker is descending. At that time, the special signal light emitter installed on the ground flashes to inform the train driver that there is a problem in the railroad crossing, and the driver sees the flashing light, This is done by manually applying the brakes.
In addition, special signal light emitters should be installed so that the signal display can be confirmed continuously from a distance of 800 m or more, and two units cannot be confirmed from a distance of 800 m or more due to terrain or other reasons. It is stipulated that it is provided above. In addition, the special signal light emitter is provided for each line segment, and for each of the up line and the down line in the case of a double track section. Therefore, a very large number of light emitters may be installed depending on the terrain.

In addition, special signal light emitters may have poor visibility due to tree growth, dust adhesion, etc., and therefore require a lot of time and manpower to confirm and secure the visibility distance for construction and maintenance. In addition, since it is easily affected by natural phenomena, it may be difficult to prevent a line-of-sight problem from occurring, and train protection with special signal light emitters may cause a level crossing accident due to oversight of crew members.
The conventional level crossing safety system employs a configuration in which one level crossing control device independently controls one level crossing safety equipment. The level crossing safety equipment includes a start point controller and an end point controller. When the start point controller detects the entry of a train, the railroad crossing control device activates the circuit breaker, alarm, etc., while the end point controller detects the passage of the train, it performs control to release the operation of the equipment. Yes.

Conventionally, for example, patent documents 1 and 2 have been proposed as inventions relating to train protection at a railroad crossing that does not depend only on human attention.
Among them, the invention of Patent Document 1 transmits an abnormality such as incomplete shutoff of a barrier at a railroad crossing to the on-board device from the ground signal facility together with the identification number of the crossing, and the on-board device is located outside the crossing (front position) ), The brake pattern is selected from the group of brake patterns to be stopped according to the own train position and the crossing identification number, and the train is stopped by executing the train speed control along the brake pattern. .

  On the other hand, the invention of Patent Document 2 transmits a stop signal together with distance information to stop the train from the ground unit provided before the railroad crossing to the on-board device when a failure of the special signal light emitter is detected. The device creates a speed check pattern to decelerate and stop the train according to the distance information, and is set in front of the special signal light emitter by controlling to apply the service brake when the train speed exceeds the speed of the pattern The vehicle is stopped at a predetermined stop position.

JP 2008-239054 A JP 2012-180036 A

However, in the invention of Patent Document 1, since a brake pattern is prepared for each level crossing, it is necessary to rewrite data in the memory of all trains when a level crossing is changed or added. There is a problem that it takes time.
In addition, in the invention of Patent Document 2, a stop signal is transmitted from the ground unit to the on-board device, and the on-board unit that has received the stop signal creates a speed check pattern. Therefore, when an abnormality such as a failure of the special signal light emitter occurs, there is a problem that the brake control is not in time.

The present invention has been made paying attention to the above problems, and provides an automatic train protection system capable of safely stopping a train when a railroad crossing trouble occurs without providing a special signal light emitter. With the goal.
Another object of the present invention is to provide an automatic train protection system capable of safely stopping a train even when a railroad crossing trouble occurs after the train has passed through an installation point of a ground element that transmits an information signal for the train. There is.

In order to solve the above problems, the invention according to the present application is
An on-vehicle controller that generates a control signal for the brake device, a storage device that stores information for generating a protection pattern, an information receiver that can read information from a ground unit installed on the track, and a monitor An on-vehicle device having a device;
A ground device capable of generating and outputting an information signal indicating that there is an abnormality in the level crossing based on a signal from a level crossing trouble notification device provided in the vicinity of the level crossing;
An automatic train protection system comprising:
The ground device includes a rail transmission transmitter capable of transmitting a current signal including predetermined information on the rail,
The on-vehicle device includes a power receiver for detecting a magnetic field generated by a current flowing in a rail and receiving an information signal included in the current, and a speed detecting means for detecting a train speed,
The on-board controller is
When information from the ground unit is received by the information receiving unit, a predetermined pattern is read from the storage device to generate a protection pattern, and set as a speed control target,
When receiving information on a level crossing trouble transmitted from the ground device by the power receiver, and determining that a level crossing trouble has occurred, the monitoring device performs notification to notify the level crossing trouble, and the protection pattern and The brake device is controlled based on a detection signal from the speed detection means so as to perform deceleration control of the train speed.

  According to the above-described means, the train can be safely stopped when a crossing trouble occurs without providing a special signal light emitter. In addition, there is no need to install a new wireless communication device or to prepare a brake pattern (protection pattern) for each level crossing and store it in the storage device on the vehicle. There is no need to rewrite the data stored in the storage device when there is a problem.

Here, preferably, the on-board control unit receives the information on the level crossing trouble transmitted from the ground device by the power receiver after setting the speed control target, and determines that no level crossing trouble has occurred. In such a case, the protection pattern is erased.
According to the above configuration, when there is no level crossing trouble at the time when the train approaches the level crossing, it is possible to pass the level crossing without applying a brake. In addition, even if the protection pattern is erased, an emergency stop is performed by receiving information on the level crossing trouble, so that a level crossing trouble occurs after the train passes the place where the ground element that transmits the information signal for the train passes. In some cases, the train can be stopped safely.

Preferably, the on-board control unit sets the brake device to stop the train if the information transmitted from the ground device cannot be received by the power receiver after setting the speed control target. A signal to be controlled is generated and output.
According to such a configuration, when the ground device including the railroad crossing control circuit is out of order, the train can be stopped, thereby ensuring the safety within the railroad crossing.

Further, preferably, in a section where two or more level crossings exist at a distance shorter than a predetermined distance, the ground device is installed for each level crossing, and communication is performed for transmitting and receiving information between the ground devices at each level crossing. Means are provided, and the information regarding the railroad crossing trouble is transmitted by the rail transmission transmitter of the ground device provided at the railroad crossing on the far side in the traveling direction of the train.
According to such a configuration, in a section where a plurality of level crossings continue at a short distance, a train can be safely stopped when a level crossing trouble occurs with relatively simple control without providing a special signal light emitter. it can.

Further, preferably, the protection pattern is configured such that the speed gradually decreases after passing through the place where the ground unit is installed, and the pattern is constantly changed at a predetermined slow speed immediately before the crossing on the near side.
According to such a configuration, the train approaches the railroad crossing in a decelerated state, and the driver can visually check the safety, and if there is an abnormality, the train can be stopped manually immediately, thus ensuring the safety within the railroad crossing. A significant delay in the train can be prevented.

  According to the automatic train protection system of the present invention, the train can be safely stopped when a railroad crossing trouble occurs without providing a special signal light emitter. In addition, there is an effect that the train can be safely stopped even when a railroad crossing trouble occurs after the train passes through the place where the ground element for transmitting the information signal for the train passes.

(A) is a system block diagram which shows the structure of the whole automatic train protection system based on this invention, (B) is a block diagram which shows the structural example of an on-board apparatus among them. It is a flowchart which shows an example of the procedure of the train protection process before a crossing in the on-board apparatus which comprises the automatic train protection system of embodiment. It is a flowchart which shows the procedure of the train protection process before a level crossing in the modification of the automatic train protection system of the said embodiment. The 2nd Example of the automatic train protection system which concerns on this invention is demonstrated, and the description which shows the method of the train protection control at the time of applying this invention to the special area continuously provided in two or more sections with a short crossing. FIG. It is explanatory drawing which shows the method of the train protection control in 3rd Example of the automatic train protection system which concerns on this invention.

Hereinafter, embodiments of an automatic train protection system according to the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1A is a system configuration diagram showing the configuration of the first embodiment of the automatic train protection system according to the present invention. As shown in FIG. 1 (A), the automatic train protection system is provided in the vicinity of a railroad crossing to control an onboard device 11 and a monitor device 12 mounted on the train 10, and a crossing alarm or breaker. And the ground device 20. Special signal emitters are not used and equivalent functions are achieved by the means described below. The monitor device 12 may be a simple lamp (such as red), or may be a lamp and a speaker provided as a set.

  As with the conventional railroad crossing control system, the ground device 20 sends a signal to the rail, continuously detects the train from the alarm start point to the alarm end point by the closed circuit type track circuit, and takes a railroad crossing according to the detection of the train. A crossing control circuit 21 for controlling the alarm device and the circuit breaker is provided. Furthermore, when the ground device 20 constituting the automatic train protection system according to the present embodiment receives a signal from the level crossing trouble notification device (emergency button) 31 provided in the level crossing, it is superimposed on the signal for detecting the train. In addition, a rail transmission transmitter (R transmission transmitter) 22 is provided for transmitting a signal informing the occurrence of a crossing trouble on the track circuit.

A railroad crossing equipped with an obstacle detection device that uses laser light or infrared rays to detect an object entering the railroad crossing, even when an object entering the railroad crossing is detected, rail transmission is performed. You may comprise so that the signal which alert | reports generation | occurrence | production of a level crossing trouble may be transmitted on a rail with the transmitter 22. FIG. In addition, when a crossing trouble has not occurred, a signal notifying that a crossing trouble has not occurred is transmitted.
Also, on a route on which only a vehicle equipped with a power receiver that receives an ATC (automatic train control) signal wave transmitted through the rail travels, rail transmission transmission is performed so that an ATC telegram is generated and transmitted as a signal wave. The vessel 22 may be configured.

  Moreover, in the automatic train protection system of this embodiment, the ground element 30 which notifies that there is a level crossing ahead is installed on the track at a position that is a predetermined distance (for example, 800 m) or more before the level crossing. The ground unit 30 only needs to be able to transmit a simple code for identifying the ground unit before the railroad crossing or information indicating the distance to the railroad crossing. Therefore, an inexpensive non-powered ground unit that can exchange information by electromagnetic induction is used. Can be used. As such a ground element, for example, there is a ground element used in the ATS-P system. In addition, in order to support the driving control of vehicles such as snowplows, maintenance vehicles, inspection vehicles, etc., it is possible to use a positioning grounding device capable of transmitting information stored in a non-contact manner (such as kilometers). good.

The train 10 includes a power receiver 13 </ b> A as an antenna for detecting a magnetic field generated by a current flowing in the rail and receiving a signal included in the current in addition to the on-vehicle device 11 and the monitor device 12, and a ground element 30. A vehicle upper arm 13B that reads and receives information and a speed sensor 13C such as a speed generator are provided.
As shown in FIG. 1 (B), the on-vehicle device 11 is connected to the power receiver 13A and receives a message transmitted by the rail transmission transmitter 22 of the ground device 20 provided near the railroad crossing. And a reception control unit 15 that is connected to the vehicle upper element 13B and reads information from the ground element 30.

  The on-board device 11 includes a CPU (microcomputer), a ROM (read only memory), a RAM (random access memory), and the like, and controls the rail transmission receiving unit 14 and the reception control unit 15 to transmit information from the ground unit 30. Vehicle control unit 16 capable of executing control processing according to the received information and a program executed by the vehicle control unit 16 or a protection pattern (speed check pattern) or protection for stopping the vehicle before the crossing A storage device 17 is provided for storing data such as pattern arithmetic expressions.

  When receiving the information from the ground unit 30 provided before the railroad crossing, the on-vehicle control unit 16 of the present embodiment reads the protection pattern or the arithmetic expression of the protection pattern from the storage device 17 and reads the vehicle speed from the speed sensor 13C. The necessary braking force is calculated from the above and a control signal for the brake device 18 is generated and output. In addition, when the on-board controller 16 detects the ground element 30, the rail transmission receiver 14 starts receiving information from the ground device 20 and executes train protection control according to the received content. Hereinafter, the contents of the control will be described in detail with reference to FIG.

FIG. 2 shows an example of a procedure for train protection processing before a crossing that is executed when a train approaches a crossing. This train protection process before a railroad crossing can be configured to be periodically executed by a timer interrupt or the like, for example.
The on-board control unit 16 first activates the reception control unit 15 (step S1), and determines whether or not the ground unit just before receiving the information, that is, the level crossing is detected (step S2). Here, when the ground element immediately before the crossing is not detected (No), the process returns to step S1 and first the reception control unit 15 is operated again to repeat the detection of the ground element 30.

If it is determined in step S2 that the ground element immediately before the crossing has been detected (Yes), the process proceeds to step S3, where the protection pattern is read from the storage device 17 or the protection pattern arithmetic expression is read and a protection pattern is generated and set as the protection pattern. To do. Subsequently, the operation of the rail transmission receiving unit 14 is started (step S4), and it is determined whether or not the information “There is a crossing trouble” is received from the rail transmission transmitter 22 (step S5).
Here, if it is determined that the information “There is a crossing trouble” has been received (Yes), the process proceeds to step S6, and the monitoring device 12 on the vehicle reports “There is a crossing trouble” by sound and light, and the driver brakes. If there is no operation, the brake control which produces | generates and outputs a control signal with respect to the brake device 18 according to the protection pattern read by step S3 is performed (step S7), and a process is complete | finished.

Thereby, the train 10 can be stopped before the railroad crossing. Further, by performing the control as described above, it is not necessary to provide a special signal light emitter in front of the railroad crossing.
Note that the protection pattern may be a common pattern regardless of the level crossing if the ground element installation position is the same (distance), or may be different for each level crossing. Since the train knows its own position from the distance traveled, it can recognize the next approaching crossing, so by storing the protection pattern for each level crossing in the memory, it is possible to respond differently to each level crossing.

On the other hand, if it is determined in step S5 that the information “There is a crossing trouble” from the rail transmission transmitter 22 is not received (No), the process proceeds to step S8, and the protection pattern set in step S3 is deleted. Subsequently, it is determined whether or not the information “There is a crossing trouble” is received from the rail transmission transmitter 22 (step S9). And if it determines with having received the information "There is a crossing trouble" (Yes), it will progress to step S10 and will perform emergency stop control.
If it is determined in step S9 that the information “There is a crossing trouble” is not received (No), the process proceeds to step S11, and it is determined from the travel distance whether the crossing has been passed. If it is determined that the railroad crossing is not passed (No), the process returns to step S9. On the other hand, if it is determined that the railroad crossing is passed (Yes), the process proceeds to step S12, the operation of the rail transmission receiving unit 14 is stopped and the process is terminated. .

  According to the control as described above, it is not necessary to newly provide a wireless communication device, and a protection pattern is set when a ground element 30 installed at a predetermined distance from the railroad crossing is detected. Trains can be safely stopped when they occur. In addition, since the protection pattern is deleted when the information of “There is a crossing trouble” is not received, it is possible to run without stopping at the crossing, and also when a crossing trouble occurs after the protection pattern is deleted. It is possible to reliably transmit trouble information to the train. Furthermore, by setting a predetermined protection pattern as a protection pattern to be set regardless of the level crossing, it is not necessary to prepare a brake pattern for each level crossing.

FIG. 3 shows a modification of the train protection process before a crossing in the above embodiment.
In this modification, step S5A for determining whether or not a signal is received from the rail transmission receiver 14 is provided between steps S4 and S5 in FIG. If it is determined that there is no signal reception itself, the process immediately proceeds to step S10 to execute emergency stop control. If a rail transmission signal is received, it is determined in step S5B whether the received signal is a “signal with a crossing trouble” or a “signal without a crossing trouble”. Other than that, it is the same as the processing of FIG. Thereby, when the ground device 20 breaks down and the transmission of the rail transmission signal is stopped, the train can be stopped to ensure safety.

  The above embodiment can be basically realized even if the installation position of the ground element 30 and the rail transmission possible section do not coincide with each other, but an insulating portion is provided on the rail in the vicinity of the installation position of the ground element 30. You may match. Further, when the rail transmission possible section (L2 in FIG. 1) is shorter than the distance L1 from the railroad crossing to the installation position of the ground child 30, L1 is set before or after step S3 in FIG. 2 (or FIG. 3). Insert a timer process that measures the time required to travel the distance of difference L2, and delay the setting of the protection pattern for a predetermined time or when the predetermined time has elapsed after setting the protection pattern, the receiving operation of the rail transmission receiver 14 is performed. You may make it start.

  In this case, the rail transmission receiving unit 14 can be always in an operating state. If the rail transmission receiving unit 14 is always in an operating state, steps S4 and S12 in FIG. 2 are not necessary. When the rail transmission possible section L2 is longer than the distance L1 to the installation position of the ground element 30, if the signal from the rail transmission receiving unit 14 is received before the information of the ground element 30 is received, the signal is It may be ignored.

(Second embodiment)
FIG. 4 shows a system configuration of a second embodiment of the automatic train protection system according to the present invention. In the second embodiment, the automatic train protection system according to the present invention is applied to a special section in which a plurality of level crossings are provided continuously in a short distance section. Specifically, the present invention is applied to a section in which the distance between two level crossings is less than 800 m, for example. The number of level crossings is not limited to two, and the present invention can also be applied to a case where three or more level crossings are continuously provided at a short distance.

  In this embodiment, as shown in FIG. 4, a communication processing unit 23 is provided in each of ground devices 20A and 20B installed in the vicinity of each level crossing, and the communication processing unit 23 transmits and receives information via a network 32. Is configured to be possible. Further, the ground device 20A at the level crossing A on the near side with respect to the traveling direction of the train 10 does not require the rail transmission transmitter 22, and information on the level crossing trouble occurring at the level crossing A is transmitted to the far side via the network 32. It is transmitted to the ground device 20B of the level crossing B. The level crossing control circuit 21 of the ground device 20B synthesizes the information on the level crossing trouble received from the ground device 20B and the information on the level crossing trouble determined by itself and transmits a signal on the rail to notify the presence or absence of the level crossing trouble by the rail transmission transmitter 22. It is configured to be.

The ground unit 30 is installed at a position corresponding to the distance at which the train can be stopped by the protective pattern with reference to the railroad crossing A on the near side with respect to the traveling direction. The network 32 may be wireless or wired.
As described above, the signal indicating the presence or absence of a level crossing trouble is transmitted from one level crossing when the two or more level crossings exist in a short section of less than 800 m. Is applied to each level crossing, and when a signal is generated at each level crossing and the signals are received and controlled on the train side, in which section both signals overlap, the signal from which level crossing This is because the control is complicated.

  In addition, a signal that informs the presence or absence of a level crossing trouble is transmitted from the level crossing B far from the approaching train 10 because the power receiver is generally connected to the front end of the leading vehicle, that is, the main shaft on the front side of the leading vehicle. Is also provided at the front position, in which case the receiver can receive the signal stably and reliably by sending the rail transmission signal from the front side rather than sending the rail transmission signal from the rear side in the traveling direction. Because.

  Further, in the present embodiment, the protection pattern set when the ground element 30 before the crossing is detected is slightly different from the above embodiment. Specifically, instead of completely stopping immediately before level crossing A, a protective pattern is set so that the vehicle decelerates to a predetermined speed that can be stopped at any time, and then maintains that speed until just before the next level crossing B. It is supposed to be. This protection pattern is also stored in advance in the storage device 17 on the vehicle. When this protective pattern is set and the vehicle is decelerated to the slow speed, the operator can manually stop the train immediately if there is an abnormality while visually confirming safety. In addition, this makes it possible to prevent a significant delay in the train while ensuring safety within the railroad crossing.

  After the train detects the ground element 30 and sets the protection pattern, it will delete the protection pattern if it receives a signal that does not interfere with a level crossing. The point that the occurrence of a crossing trouble is notified by sound and light, and the point that an emergency stop occurs when a signal indicating that a crossing trouble is received after the protection pattern is deleted is the same as in the first embodiment. Therefore, the control procedure by the on-board controller 16 of the on-board device 11 may be the same as that shown in the flowcharts of FIGS.

  As described above, the speed is reduced to a slow speed immediately before level crossing A, and then the speed is maintained when the level crossing trouble occurs not at level crossing A but at level crossing B. This is so that the vehicle can move to just before level crossing B. When the distance between the level crossing A and the level crossing B is a section shorter than the train length, a protection pattern that stops completely immediately before the level crossing A may be set. In the case of a single track section, the rail transmission transmitter 22 is also provided on the ground device 20A at the level crossing A, and when the train travels from the level crossing B side, a signal indicating the occurrence of a level crossing trouble is transmitted from the ground device 20A to the rail. You may comprise so that it may do.

(Modification)
FIG. 5 shows a system configuration of a modified example of the automatic train protection system of the second embodiment. In this modification, the automatic train protection system according to the present invention is applied to a section in which a plurality of level crossings are continuously provided, as in the second embodiment.
In the present modification, as shown in FIG. 5, a ground element 30A for a level crossing A and a ground element 30B for a level crossing B are installed in front of the level crossing A, and a protection pattern is generated from each of the ground elements 30A and 30B. Information (identification information of level crossings A, B, distance information to level crossings A and B, control range) is transmitted. The other configuration is the same as that of the embodiment shown in FIG. 4, and a rail transmission transmitter 22 is provided in the ground device 20B of the railroad crossing B, and information (railroad crossings A, A signal including the identification information of B, the notification information of railroad crossings A and B, and the cutoff information of railroad crossings A and B is transmitted onto the rail.

In the automatic train protection system of the second embodiment shown in FIG. 4, only the protection pattern up to the railroad crossing A on the side close to the train 10 can be set by the information from the ground element 30, A protection pattern up to the crossing A and a protection pattern up to the crossing B can be set by information from the ground elements 30A and 30B.
4 and 5 show the case where two level crossings are provided continuously, but the case where three or more level crossings are provided continuously in a relatively short section is also described above. Similarly, a rail transmission transmitter 22 is provided in the ground device installed at the railroad farthest from the train, and the rail transmission transmitter 22 uses the rail transmission transmitter 22 to send a signal including information informing the presence or absence of a railroad crossing trouble. You may comprise so that it may transmit to the top.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation and change are possible. For example, in the above-described embodiment, it has been described that a non-powered ground unit is used as the ground unit 30 installed before the railroad crossing. However, for example, a grounded unit having a power source developed for an ATS (automatic train stop system) is used. Can also be used. Further, the number of ground elements is not limited to one, and two or more ground elements may be installed and different protection patterns may be set each time each ground element is detected.
Further, in the embodiment, after the train detects the ground element 30 installed before the railroad crossing, the rail crossing trouble information is transmitted by the rail transmission method. Crossing trouble information may be transmitted by short-range wireless communication.

DESCRIPTION OF SYMBOLS 11 On-board apparatus 12 Monitor apparatus 13A Power receiver 13B Upper child 14 Rail transmission receiving part 15 Reception control part (information receiving part)
16 On-vehicle control unit 17 Storage device 20 Ground device 21 Railroad crossing control circuit 22 Rail transmission transmitter 23 Communication processing unit 30 Ground unit 31 Railroad crossing trouble notification device 32 Network

Claims (5)

An on-vehicle controller that generates a control signal for the brake device, a storage device that stores information for generating a protection pattern, an information receiver that can read information from a ground unit installed on the track, and a monitor An on-vehicle device having a device;
A ground device capable of generating and outputting an information signal indicating that there is an abnormality in the level crossing based on a signal from a level crossing trouble notification device provided in the vicinity of the level crossing;
An automatic train protection system comprising:
The ground device includes a rail transmission transmitter capable of transmitting a current signal including predetermined information on the rail,
The on-vehicle device includes a power receiver for detecting a magnetic field generated by a current flowing in a rail and receiving an information signal included in the current, and a speed detecting means for detecting a train speed,
The on-board controller is
When information from the ground unit is received by the information receiving unit, a predetermined pattern is read from the storage device to generate a protection pattern, and set as a speed control target,
When receiving information on a level crossing trouble transmitted from the ground device by the power receiver, and determining that a level crossing trouble has occurred, the monitoring device performs notification to notify the level crossing trouble, and the protection pattern and An automatic train protection system configured to control deceleration of a train speed by controlling the brake device based on a detection signal from the speed detection means.   The on-board controller, after setting the speed control target, receives information on the level crossing trouble transmitted from the ground device by the power receiver, and determines that no level crossing trouble has occurred, The automatic train protection system according to claim 1, wherein the protection pattern is erased.   The on-board controller generates a signal for controlling the brake device to stop the train if the information transmitted from the ground device cannot be received by the power receiver after setting the speed control target. The automatic train protection system according to claim 1, wherein the automatic train protection system is output.   In a section where two or more level crossings exist at a distance shorter than a predetermined distance, the ground device is installed for each level crossing, and communication means for transmitting and receiving information between the ground devices of each level crossing is provided, The information regarding a level crossing trouble is transmitted by the rail transmission transmitter of the ground device provided at a level crossing on the far side in the traveling direction of the train. Automatic train protection system as described in   5. The protection pattern according to claim 4, wherein the speed gradually decreases after passing through the place where the ground unit is installed, and is a pattern that changes constantly at a predetermined slow speed immediately before a crossing on the near side. Automatic train protection system.

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