Train Control System

Abstract

To provide a train control system capable of detecting a failure in a speed detection device without introducing an increase in cost in the train control system using radio communication.SOLUTION: A train control system calculates the speed and the position of a train 10 by inputting outputs of speed detection devices 12, 14 to on-vehicle devices 11, 13, and controls the train on the basis of position information and speed information. Then, it transmits the speed and the position of the train based on the outputs of the plurality of speed detection devices from the on-vehicle devices 11, 13 to a ground device 15 by radio, the ground device performs a failure determination of the speed detection devices, and the ground device notifies the on-vehicle devices of the failure when the failure is determined.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a train control system using wireless communication. [Background technology]

[0002] Patent Document 1 describes a train control system in which an on-board device calculates the running distance based on the train's vehicle speed, calculates the leading edge position of the train itself, and calculates the rear end position of the train itself based on a value obtained by adding an error in the running distance to the leading edge position and the length of the train itself, and transmits information indicating the calculated leading edge position and rear end position of the train itself to a ground-side device.

[0003] In this patent document 1, a speed detection device (a speed generator) is used to detect train speed from the axle rotation speed, and the position of the train is determined by calculating the traveling distance from the product of the axle rotation speed and the wheel diameter based on the signal from the speed generator. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-25389 A Summary of the Invention [Problem to be solved by the invention]

[0005] By the way, when the tachometer generator breaks down and no speed signal is output, if the driver is on board, he can detect the breakdown because the speedometer does not work while the train is moving. Usually, only one tachometer generator is installed in a car with a driver's cab.

[0006] For this reason, when the above-mentioned train control system is introduced to an existing train, it is not possible to determine whether the tachometer generator has stopped or is broken, resulting in a dangerous failure. Therefore, two or more tachometer generators are installed so that the on-board equipment can detect an abnormality in the tachometer generator based on the difference in speed detected by these tachometer generators. However, in order to add a speed generator, the bogie needs to be modified, which is problematic in that it requires a lot of time and money.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a train control system using wireless communication that can detect failures in a speed detection device without incurring increases in costs. [Means for solving the problem]

[0008] A train control system according to one aspect of the present invention is a train control system that inputs the output of a speed detection device to an on-board device to calculate the speed and position of a train, and controls the train based on the position information and the speed information, and Multiple units The on-board equipment transmits the information wirelessly to the ground equipment, and the ground equipment The amount of change in train speed and position based on the speed information and position information is compared, and the difference in the amount of change is used to calculate A malfunction of the speed detection device is judged, and when a malfunction is judged, the trackside device notifies the on-board device. Effect of the Invention

[0009] According to the train control system of the present invention, the outputs of multiple speed detection devices are wirelessly transmitted from the on-board equipment to the ground equipment, and the ground equipment judges whether the speed detection devices have failed, so that the failure of the speed detection devices can be detected without increasing costs. For example, by using two tachometer generators for the on-board equipment installed in the front and rear cabs, respectively, there is no need to add more tachometer generators, and the cost and time required for modification can be reduced. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic configuration diagram of a train control system according to an embodiment of the present invention. [Diagram 2] 2 is a block diagram showing an example of the configuration of an on-board device provided in the front cab in FIG. 1. [Diagram 3] 3 is a flowchart showing a method for detecting a fault in a tachograph in the train control system shown in FIGS. 1 and 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows a schematic configuration of a train control system according to an embodiment of the present invention. An on-board device 11 is installed in the front cab 10a of a train 10, and the output of a speed generator 12 acting as a speed detection device is supplied to this on-board device 11. The on-board device 11 calculates the speed and position of the train 10 based on the output of the speed generator 12, and transmits the speed information and position information to a ground device 15 via wireless communication.

[0012] In addition, an on-board device 13 is installed in the rear cab 10b of the train 10, and the output of a speed generator 14 serving as a speed detection device is supplied to this on-board device 13. The on-board device 13 calculates the speed and position of the train 10 based on the output of the speed generator 14, and transmits the speed information and position information to the ground device 15 by wireless communication.

[0013] The ground equipment 15 judges whether the tachograph generators 12, 14 have a fault from the received speed information or position information, and when it judges that a fault has occurred, notifies the on-board equipment 11, 13 from the ground equipment 15. The fault judgment is performed from the difference in the amount of change in the speed of the train 10 or the amount of change in the position of the train 10 based on the speed information or position information transmitted from the on-board equipment 11, 13.

[0014] For example, it is determined whether the difference in speed difference is within a normal range, and if it is outside the normal range, it is determined to be a malfunction. Taking into account errors due to wheel slippage of the train 10, etc., a malfunction is determined to exist if the speed difference is within 3 to 5 km per hour. If it is determined that the tachograph generator 12 or 14 is malfunctioning, the ground device 15 notifies the on-board devices 11, 13 to that effect. Thereafter, if necessary, the on-board devices 11, 13 will stop the train 10 to avoid danger.

[0015] Fig. 2 shows an example of the configuration of the on-board equipment 11 of the front cab 10a in Fig. 1. The on-board equipment 11 includes a control device 21 consisting of a microcomputer or the like, a display 22 that displays the speed and position of the train 10, various notices, warnings, alarms, and the like, and a wireless device 23. The output of the speed generator 12 is input to the control device 21, and the speed and position of the train 10 are calculated. The calculated speed information and position information are displayed on the display 22 and are wirelessly transmitted from the wireless device 23 to the ground equipment 15 via an antenna 24. Furthermore, the control device 21 controls a brake device 25 to stop the train 10 as necessary. The on-board device 13 in the rear cab is configured in the same manner.

[0016] Fig. 3 shows a method for detecting a fault in the tachograph generator 12 or 14 in the train control system shown in Fig. 1 and Fig. 2. First, the control devices 21 in the on-board devices 11, 13 of the front and rear cabs 10a, 10b calculate the speed or position of the train 10 based on signals from the tachograph generators 12, 14 (step S1). Next, the on-board devices 11, 13 in the front and rear cabs 10a, 10b transmit speed information and position information to the ground device 15 (step S2).

[0017] Next, the ground device 15 compares the speed information or position information of the front and rear cabs 10a, 10b and determines whether the difference is within a normal range (step S3). If it is determined that the difference is within the normal range, the process returns to step S1 and the operations from step S1 to step S3 are repeated. On the other hand, if it is determined that the difference is not within the normal range, the ground equipment 15 outputs an alarm to the on-board equipment 11, 13, or outputs a train stop command (step S4). On the on-board equipment 11, 13 side, for example, the driver stops the train based on the alarm displayed on the display 22, or the on-board equipment 11 controls the brake device 25 to stop the train 10 upon receiving the train stop command (step S5).

[0018] After a train stop command is issued, the ground equipment 15 may issue a very slow speed command to the on-board equipment 11, 13 to prevent the speed from increasing even if the equipment is operated by mistake. If the tachograph 12 or 14 is operated as if repairs were completed when repairs have not been completed, the train will travel a certain distance before it is determined to have a malfunction again. However, by issuing a very slow speed command, it is possible to ensure in advance that the running speed during that time will be limited.

[0019] In addition, although the above description has been given of a case where the ground device 15 uses speed information or position information to determine whether or not the information is within the normal range, it is of course possible to use both information.

[0020] As described above, according to the present invention, the outputs of the tachograph generators 12, 14 are supplied to the on-board devices 11, 13 installed in the front cab 10a and the rear cab 10b, respectively, to calculate the speed and position of the train 10, and the speed and position information is wirelessly transmitted from the on-board devices 11, 13 to the ground device 15, which then determines whether or not there is a fault in the tachograph generators 12, 14. This eliminates the need to add additional tachograph generators, and reduces the cost and time required for modifications when updating the system.

[0021] Normally, a train that runs as a train has two cabs so that it can run in either forward or backward direction as an up-bound or down-bound train, and each cab is equipped with the necessary on-board equipment. Therefore, there is no need to install new equipment, including a tachometer generator, so fault detection of the tachometer generator can be realized without increasing costs. Moreover, there is no need for the expense and time required to modify the bogie, which also helps to reduce costs.

[0022] It is also possible to connect the front and rear cabs 10a, 10b with cables and share the signals of the speed generators 12, 14 of the cars T1, Tn with the front and rear cabs 10a, 10b, treating them as two cars, but in that case, additional cable installation is required for the intermediate cars T2 to T(n-1). Also, a conversion device may be required to send and receive speed signals between the cars, which again requires a lot of cost and time, so the present invention is more effective.

[0023] The circuit configurations and operation procedures described in the above embodiments are merely schematic illustrations to enable the present invention to be understood and implemented. Therefore, the present invention is not limited to the described embodiments, and may be modified in various forms without departing from the scope of the technical ideas set forth in the claims.

[0024] For example, if the on-board devices 11, 13 detect that the wheels of the train 10 are spinning or skidding, they can notify the ground device 15 of this and take the average value of the change in speed or position or temporarily change the normal range for determining a fault, thereby suppressing the effects of disturbances.

[0025] In addition, in FIG. 1, the speed generators 12, 14 are described as being installed in the same cars T1, Tn as the on-board devices 11, 13, as an example, but they may be installed in different cars, such as adjacent cars T2, T(n-1). [Explanation of symbols]

[0026] 10... train, 10a... front cab, 10b... rear cab, 11... on-board device, 12... speed generator (speed detection device), 13... on-board device, 14... speed generator (speed detection device), 15... ground device, 21... control device, 22... display, 23... radio device, 24... antenna, 25... brake device

Claims

1. A train control system that inputs an output of a speed detection device to an on-board device to calculate a train's speed and position, and controls the train based on the position information and the speed information, A train control system in which the outputs of multiple speed detection devices are wirelessly transmitted from multiple on-board devices to ground equipment, the ground equipment compares the amount of change in the train's speed and position based on the speed information and position information, and determines whether there is a malfunction in the speed detection devices based on the difference in the amount of change.When a malfunction is determined, the ground equipment notifies the on-board equipment.

2. 2. The train control system according to claim 1, wherein each of the plurality of speed detection devices is a speed generator installed in a different car of the train.

3. 3. The train control system according to claim 2, characterized in that the on-board equipment is installed in the front and rear cabs, respectively, and outputs of speed generators installed in different cars of the train are supplied to the on-board equipment in the front cab and the on-board equipment in the rear cab, respectively.

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