WO2021199232A1

WO2021199232A1 - Monitoring system

Info

Publication number: WO2021199232A1
Application number: PCT/JP2020/014735
Authority: WO
Inventors: 勲西岡; 賢司藤崎; 後藤　亮介; 新井　修; 憲太郎船渡
Original assignee: 三菱電機株式会社; 東京地下鉄株式会社
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-10-07
Also published as: JP7330364B2; JPWO2021199232A1; DE112020007009T5

Abstract

The monitoring system (1) according to the present disclosure comprises: a brake cylinder pressure detection unit (17) that detects a brake cylinder pressure indicating the pressure of a brake cylinder included in a brake device (18) that generates a mechanical brake force by pressing a frictional member (25) against a rotating body (19) provided in a vehicle (2); an air release time measurement unit (27) that, in a state where the vehicle (2) is stopped and a brake instruction has been inputted, measures the time it takes for the brake cylinder pressure detected by the brake cylinder pressure detection unit (17) to decrease to a predetermined first reference pressure after the brake instruction is cancelled; and a diagnosis unit (31) that, if the brake cylinder pressure air release time measured by the air release time measurement unit (27) is longer than or equal to a predetermined first reference time, determines that there is an air release abnormality or a sign that air release abnormality will occur.

Description

Monitoring system

The present disclosure relates to a monitoring system that monitors the state of a railroad vehicle braking device.

In the conventional brake device, for example, the BC pressure after a lapse of a predetermined time from the start of the brake loosening operation is measured, and when the measured BC pressure (brake cylinder pressure) is equal to or higher than a predetermined value, it is detected as a state of brake non-relaxation. (For example, see paragraph [0005] of Patent Document 1).

Japanese Unexamined Patent Publication No. 08-290766

However, when the brake non-relaxation is detected depending on whether or not the BC pressure is equal to or higher than the predetermined value as in the conventional case, there is a problem that it is not possible to detect an abnormality or a sign of an abnormality in the stage before the brake in-relaxation occurs. There is.

The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a monitoring system capable of detecting an exhaust abnormality or a sign of an exhaust abnormality in the stage before the brake becomes inflexible. And. Furthermore, it is an object of the present disclosure to provide a monitoring system capable of detecting an air supply abnormality or a sign of an air supply abnormality in a stage prior to a brake shortage.

In order to achieve the above object, the monitoring system according to the present disclosure detects the brake cylinder pressure indicating the pressure of the brake cylinder possessed by the brake device that generates the mechanical braking force by pressing the friction material against the rotating body provided in the vehicle. The brake cylinder pressure detection unit and the brake cylinder pressure detected by the brake cylinder pressure detection unit after the brake command is released in the state where the vehicle is stopped and the brake command is input are predetermined. When the brake cylinder pressure / exhaust time required to drop to the first reference pressure is measured by the exhaust time measuring unit and the brake cylinder pressure / exhaust time measured by the exhaust time measuring unit is equal to or longer than the predetermined first reference time. Is provided with a diagnostic unit that determines that there is an exhaust abnormality or a sign of an exhaust abnormality.

Further, the monitoring system according to the present disclosure is a brake cylinder pressure detection unit that detects a brake cylinder pressure indicating the brake cylinder pressure of a brake device that generates a mechanical braking force by pressing a friction material against a rotating body provided in a vehicle. When the vehicle is stopped and the brake command is not input, the brake cylinder pressure detected by the brake cylinder pressure detector after the brake command is input is higher than the target brake cylinder pressure for the brake command. The brake cylinder pressure air supply time required to rise to the 4th reference pressure set low is measured by the air supply time measuring unit, and the brake cylinder pressure air supply time measured by the air supply time measuring unit is predetermined. 6 If it is longer than the reference time, it is provided with a diagnostic unit that determines that there is an air supply abnormality or a sign of an air supply abnormality.

According to the monitoring system according to the present disclosure, a brake cylinder pressure detection unit that detects a brake cylinder pressure indicating the brake cylinder pressure of a brake device that generates a mechanical braking force by pressing a friction material against a rotating body provided in a vehicle. When the vehicle is stopped and the brake command is input, the brake cylinder pressure detected by the brake cylinder pressure detector after the brake command is released becomes the predetermined first reference pressure. If the brake cylinder pressure / exhaust time measured by the exhaust time measuring unit that measures the brake cylinder pressure / exhaust time required to decrease and the brake cylinder pressure / exhaust time measured by the exhaust time measuring unit is equal to or longer than the predetermined first reference time, the exhaust is abnormal or exhausted. Since it is provided with a diagnostic unit that determines that there is a sign of abnormality, it is possible to detect an exhaust abnormality or a sign of an exhaust abnormality in the stage before the brake becomes inflexible.

According to the monitoring system according to the present disclosure, a brake cylinder pressure detection unit that detects a brake cylinder pressure indicating the brake cylinder pressure of a brake device that generates a mechanical braking force by pressing a friction material against a rotating body provided in a vehicle. When the vehicle is stopped and the brake command is not input, the brake cylinder pressure detected by the brake cylinder pressure detector after the brake command is input is higher than the target brake cylinder pressure for the brake command. The brake cylinder pressure air supply time required to rise to the 4th reference pressure set low is measured by the air supply time measuring unit, and the brake cylinder pressure air supply time measured by the air supply time measuring unit is predetermined. 6 If it is longer than the reference time, it is equipped with a diagnostic unit that determines that there is an air supply abnormality or a sign of an air supply abnormality, so it can detect a sign of an air supply abnormality or an air supply abnormality in the stage before the brake shortage. can do.

It is a block diagram which shows an example of the structure of the monitoring system which concerns on Embodiment 1 of this disclosure. It is a block diagram which shows an example of the structure of the brake control device which concerns on Embodiment 1 of this disclosure. It is a figure which shows an example of the measurement of the brake cylinder pressure exhaust time by the monitoring system which concerns on Embodiment 1 of this disclosure. It is a figure which shows another example of the measurement of the brake cylinder pressure exhaust time by the monitoring system which concerns on Embodiment 1 of this disclosure. It is a figure which shows an example of the measurement of the brake cylinder pressure exhaust time and AC pressure exhaust time by the monitoring system which concerns on Embodiment 1 of this disclosure. It is a flowchart which shows an example of the flow of the prediction of the exhaust abnormality and the determination of the exhaust abnormality using the brake cylinder pressure exhaust time by the monitoring system which concerns on Embodiment 1 of this disclosure. It is a flowchart which shows an example of the flow of the prediction of the exhaust abnormality and the determination of the exhaust abnormality using the brake cylinder pressure exhaust time by the monitoring system which concerns on Embodiment 1 of this disclosure. It is a figure which shows an example of the time-dependent change of the brake cylinder pressure exhaust time. It is a block diagram which shows an example of the structure of the brake control device which concerns on Embodiment 2 of this disclosure. It is a figure which shows an example of the measurement of the brake cylinder pressure supply time by the monitoring system which concerns on Embodiment 2 of this disclosure. It is a figure which shows another example of the measurement of the brake cylinder pressure supply time by the monitoring system which concerns on Embodiment 2 of this disclosure. It is a figure which shows an example of the measurement of the brake cylinder pressure supply time and AC pressure supply time by the monitoring system which concerns on Embodiment 2 of this disclosure. It is a flowchart which shows an example of the flow of the prediction of the air supply abnormality and the determination flow of the air supply abnormality using the brake cylinder pressure air supply time by the monitoring system which concerns on Embodiment 2 of this disclosure. It is a flowchart which shows an example of the flow of the prediction of the air supply abnormality and the determination flow of the air supply abnormality using the brake cylinder pressure air supply time by the monitoring system which concerns on Embodiment 2 of this disclosure. It is a figure which shows an example of the time-dependent change of the brake cylinder pressure air supply time. It is a figure which shows an example of the hardware configuration which realizes each apparatus provided in the monitoring system which concerns on

Embodiments

1 and 2 of this disclosure.

Hereinafter, embodiments of the monitoring system according to the present disclosure will be described with reference to the drawings.

Embodiment 1.
FIG. 1 is a block diagram showing an example of the configuration of the monitoring system according to the first embodiment. As shown in FIG. 1, the monitoring system 1 according to the first embodiment is applied to, for example, a vehicle 2 such as a brake control device 3 and a brake control device 3 for controlling a brake device mounted on a vehicle 2 constituting a train. Terminal device 4 that collects status information indicating the status of a plurality of mounted devices, central device 5 that acquires status information of a plurality of devices output from the terminal device 4, status information output from the central device 5, and the like. It includes an on-board wireless device 7 that transmits to the ground side by wireless communication via the network 6, a ground device 8 that acquires state information and the like from the vehicle 2 via the on-board wireless device 7. Further, the leading vehicle 2a includes a control operation device (not shown) such as a main controller (master controller) that generates a brake command according to a brake operation performed by the operator, a monitor display (not shown), and the like. The driver's cab 9 is mounted. Although FIG. 1 shows only two rolling stocks 2 of the leading rolling stock 2a and the following rolling stock 2b adjacent to the rolling stock, the number of rolling stock 2 constituting the train is not particularly limited.

The central device 5 acquires the state information of the plurality of devices output from the terminal device 4 that collects the state information indicating the states of the plurality of devices mounted on each vehicle 2. Although not shown in detail, the devices mounted on the vehicle 2 include, for example, a propulsion control device, an auxiliary power supply device, an air conditioner, a lighting device, a door, wheels, a motor, and the like, in addition to the brake control device 3. The type of equipment mounted may differ depending on the vehicle 2. The plurality of devices are connected to the terminal device 4 provided in the vehicle 2 on which each of the devices is mounted via the in-vehicle transmission line (branch line transmission line) 10. The state information of each of the plurality of devices is collected by the terminal device 4 via various sensors and the like that detect each state information provided in each device. The in-vehicle transmission line 10 is a transmission line arranged in the vehicle 2, and is configured by using, for example, a LAN line or the like. In addition, device identification information for uniquely identifying the own device is assigned to each of the plurality of devices. Further, each vehicle 2 on which a plurality of devices are mounted is also provided with vehicle identification information for uniquely identifying its own vehicle. Further, the vehicle identification information may be added with the vehicle number information indicating the vehicle number of the vehicle 2 or the vehicle type information indicating whether the vehicle 2 is the leading vehicle, the intermediate vehicle, or the trailing vehicle.

The terminal device 4 is installed in each vehicle 2 and is connected to each other via an inter-vehicle transmission line (main transmission line) 11. The inter-vehicle transmission line 11 is a transmission line arranged between the vehicles 2, and is configured by using, for example, a LAN line or the like. The terminal device 4 transmits control information including a control command output from the central device 5 to each device in the vehicle 2. Further, the terminal device 4 transmits the collected state information of each device to the central device 5 in response to a command from the central device 5.

The central device 5 is mounted on, for example, the first vehicle 2a and the last vehicle 2 (not shown). The central device 5 is connected to the terminal device 4, and acquires and manages the state information of each device output from the terminal device 4. Then, the central device 5 transmits the state information of each device managed by itself to the ground device 8 via the on-board wireless device 7.

In the central device 5, in addition to managing the status information of a plurality of devices, for example, train operation information indicating stop station information and departure / arrival station time, train identification information for identifying a train, train position information indicating a train position, and the like. Train speed information indicating the speed of the train, vehicle number information indicating the number of connected vehicles of the train, traveling direction information indicating the traveling direction of the train, vehicle length information indicating the vehicle length of each vehicle 2 constituting the train, and main control. It manages train information sent and received within the train, such as notch information indicating the number of stages of vessels. Further, the central device 5 manages door opening / closing information indicating opening / closing information of the doors for passengers getting on / off provided in each vehicle 2 as state information. In addition, the central device 5 may also manage environmental information indicating the temperature, humidity, precipitation, wind speed, and the like around the train location. Further, the central device 5 is connected to the driver's cab 9, and the control information input from the control operation device or the like provided in the driver's cab 9 is transmitted to each device via the terminal device 4 installed in each vehicle 2. Send and control. Further, the monitor display provided in the cab 9 displays information such as train speed, door open / closed state, brake cylinder pressure, and the like.

FIG. 2 is a block diagram showing an example of the configuration of the brake control device according to the first embodiment of the present disclosure. As shown in FIG. 2, the brake control device 3 includes a control unit 12, a brake control valve 13, a relay valve 14, an air spring pressure detection unit (hereinafter referred to as “AS pressure sensor”) 15, and an AC pressure detection unit (hereinafter, referred to as “AS pressure sensor”) 15. It is provided with a brake cylinder pressure detection unit (hereinafter referred to as “BC pressure sensor”) 17 and the like (hereinafter referred to as “AC pressure sensor”) 16. Further, as shown in FIG. 2, in addition to the brake control device 3, the vehicle 2 includes a brake device 18, wheels 19, an air spring 20, a compressed air tank 21, a speed sensor 22, and a temperature detection unit (temperature sensor). ) 23 and the like are provided. For example, the brake control device 3 receives a brake command output from the master controller of the driver's cab 9, and controls the operation of the brake device 18 based on the brake command. The brake command is input to the brake control device 3 from the master controller operated by the operator or the like, for example, for a regular brake command (brake notch signal) set in seven stages, an emergency stop, or the like. It includes the emergency brake command used.

The brake device 18 is a mechanical brake that acts on each wheel 19, and is provided on each wheel 19's axle. The brake device 18 has a brake cylinder 24 and a brake shoe 25 which is a friction material that operates in response to the pressure of air inside the brake cylinder 24. In the brake device 18, the air compressed from the compressed air tank 21 is supplied to the brake cylinder 24 via the brake control device 3, and when the pressure in the brake cylinder 24 rises, the brake shoe 25 moves the vehicle 2 to the vehicle 2. A mechanical braking force is generated by being pressed against the wheel 19 which is a rotating body that rotates during traveling. The mechanical braking force is represented by the product of the pressing force, which is the force that presses the brake shoe 25 against the wheel 19, and the coefficient of friction of the contact surface between the brake shoe 25 and the wheel 19. The brake device 18 may be a disc brake. When the brake device 18 is a disc brake, the brake disc, which is a rotating body, is fixed to the axle or the like, and the mechanical braking force is generated by sandwiching the brake disc with the brake pad, which is a friction material, according to the BC pressure. appear.

Although not shown in detail, the brake control valve 13 is, for example, a supply valve (AMV: Apply Magnet Valve) which is an electromagnetic valve for supplying compressed air to the relay valve 14, and an electromagnetic valve for discharging compressed air from the relay valve 14. It is composed of an exhaust valve (RMV: Release Magnet Valve). Further, the brake control valve 13 opens and closes the supply valve and the exhaust valve based on the compressed air from the compressed air tank 21 and the solenoid valve opening / closing signal from the control unit 12, so that the compressed air supplied to the relay valve 14 is supplied. Control the flow rate.

The relay valve 14 uses the compressed air of the compressed air tank 21 to supply the compressed air to the brake cylinder 24 in proportion to the pressure of the compressed air from the brake control valve 13 and whose flow rate is amplified.

The AS pressure sensor 15 is a sensor that detects the AS pressure indicating the pressure of the air spring 20 provided in the vehicle 2. The AS pressure, which is the pressure of the air spring 20, which is a signal indicating the weight of the vehicle 2, is input to the AS pressure sensor 15. The AS pressure sensor detects this AS pressure and outputs the measured value to the control unit 12. In the air spring 20, the AS pressure output to the AS pressure sensor 15 is changed according to the load applied to the vehicle 2. Therefore, the control unit 12 can measure the load applied to the vehicle 2 based on the AS pressure.

The AC pressure sensor 16 detects the AC pressure, which is the pressure of the compressed air supplied from the brake control valve 13 to the relay valve 14 as the brake command pressure, and outputs the measured value to the control unit 12.

The BC pressure sensor 17 detects the BC pressure, which is the pressure of the compressed air supplied from the relay valve 14 to the brake cylinder 24, and uses the measured value as the brake cylinder pressure measured value (hereinafter, referred to as “BC pressure measured value”). Output to the control unit 12.

The speed sensor 22 is a sensor that generates a speed signal indicating the speed of the vehicle 2 based on the rotation speed of the wheels 19 and outputs the speed signal to the control unit 12. Although omitted in FIG. 2, the speed sensor 22 is installed on the front and rear bogies of the vehicle 2, and the vehicle 2 can detect the speed from each wheel 19.

The temperature sensor 23 is provided around the brake device 18, and is a sensor that detects temperature information around the brake device 18. The temperature sensor 23 detects the temperature information around the brake device 18 and outputs it to the control unit 12.

The control unit 12 controls the brake device 18 so as to generate a mechanical braking force by pressing the brake shoes 25 against the wheels 19 in the vehicle 2. The control unit 12 calculates the braking force required for the vehicle 2 based on the brake command and the AS pressure. The required braking force is obtained by the product of the load of the vehicle 2 and the deceleration included in the brake command. Then, the control unit 12 calculates the target pressure value in the brake cylinder 24 based on the calculated braking force. The control unit 12 includes, for example, a determination unit 26, an exhaust time measurement unit 27, a position information acquisition unit 28, and an environment information acquisition unit 29.

FIG. 3 is a diagram showing an example of measurement of the brake cylinder pressure / exhaust time by the monitoring system according to the first embodiment of the present disclosure. In FIG. 3, the horizontal axis is the brake cylinder pressure exhaust time (hereinafter referred to as “BC pressure exhaust time”) indicating the elapsed time from when the brake command is released and the BC pressure starts to be exhausted to the brake cylinder 24, and the vertical axis is BC. The BC pressure detected by the pressure sensor 17 is shown. The determination unit 26 determines whether or not the brake command has been released (for example, the brake release command has been input) while the vehicle 2 is stopped and the brake command has been input. The state in which the vehicle 2 is stopped includes, for example, when the vehicle 2 is stopped at a station or when a delivery inspection is performed, but the present invention is not limited to this. As shown in FIG. 3, when the brake command is released, the BC pressure is exhausted, so that the BC pressure begins to decrease. When, for example, the determination unit 26 determines that the brake command has been released, the determination unit 26 notifies the exhaust time measurement unit 27 of a brake command release signal indicating that the brake command has been released.

As shown in FIG. 3, the exhaust time measuring unit 27 measures the BC pressure exhaust time after the brake command is released. More specifically, when the exhaust time measuring unit 27 receives the brake command release signal from the determination unit 26, the BC pressure detected by the BC pressure sensor 17 first drops to the predetermined first reference pressure P1. Measure the required BC pressure exhaust time. The first reference pressure P1 may be a pressure value set higher than the threshold value of the BC pressure used for detecting the conventional brake instability, and is set to, for example, 50 kPa. Further, the exhaust time measuring unit 27 also measures the BC pressure exhaust time required for the BC pressure detected by the BC pressure sensor 17 to drop to the predetermined second reference pressure P2 and the third reference pressure P3, respectively. The second reference pressure P2 is a pressure value set lower than the first reference pressure P1, and the third reference pressure P3 is a pressure value set lower than the second reference pressure P2. The second reference pressure P2 may be set lower than the first reference pressure P1 and is not particularly limited, but is set to, for example, half the value of the first reference pressure P1. Further, the third reference pressure P3 may be set lower than the second reference pressure P2, and is not particularly limited, but is set to, for example, 2 to 10 [kPa].

Similarly, the exhaust time measuring unit 27 measures the AC pressure exhaust time after the brake command is released. More specifically, when the exhaust time measuring unit 27 receives the brake command release signal from the determination unit 26, the AC pressure exhaust required for the AC pressure detected by the AC pressure sensor 16 to drop to the first reference pressure P1. Measure the time. The exhaust time measuring unit 27 also measures the AC pressure exhaust time required for the AC pressure detected by the AC pressure sensor 16 to drop to the second reference pressure P2 and the third reference pressure P3, respectively.

The position information acquisition unit 28 acquires train position information indicating the position of the train from, for example, the central device 5. Further, the environmental information acquisition unit 29 acquires, for example, environmental information indicating the temperature, humidity, precipitation, wind speed, and the like around the area where the train is located from the central device 5.

In the control unit 12, for example, the train position information, environmental information, and temperature when the determination unit 26 determines that the brake command has been released in the BC pressure exhaust time and the AC pressure exhaust time measured by the exhaust time measurement unit 27. Information such as information, date and time information, brake command information, and door opening / closing information are linked. Further, the control unit 12 further links the vehicle identification information of the vehicle 2 on which the brake device 18 is mounted, the device identification information of the brake device 18, and the device identification information of the brake control device 3 to the vehicle. It is transmitted to the ground device 8 via the upper radio device 7.

As shown in FIG. 1, the ground device 8 includes a data storage unit 30 and a diagnosis unit 31. The data storage unit 30 stores the BC pressure exhaust time, the AC pressure exhaust time, and the like transmitted from the vehicle 2. The data storage unit 30 also stores information acquired by the brake control device 3 mounted on the vehicle 2 constituting the train other than the vehicle 2 constituting the train in a distinguishable state. The diagnosis unit 31 determines an exhaust abnormality or a sign of an exhaust abnormality related to the exhaust operation of the BC pressure by using, for example, the BC pressure exhaust time or the like. The diagnosis unit 31 acquires the BC pressure exhaust time and the AC pressure exhaust time from, for example, the data storage unit 30.

In FIG. 3, the exhaust time-BC pressure curve BR1 showing the relationship between the BC pressure exhaust time and the BC pressure under normal conditions is shown by a solid line. Further, the exhaust time-BC pressure curve BR2 showing the relationship between the BC pressure exhaust time and the BC pressure at the time of a sign of an exhaust abnormality, the exhaust time-BC pressure curve BR3 showing the relationship between the BC pressure exhaust time and the BC pressure at the time of an exhaust abnormality, and The exhaust time-BC pressure curve BR4 showing the relationship between the BC pressure exhaust time and the BC pressure when the brake is not released is shown by broken lines.

Further, the first reference time T1 shown in FIG. 3 is a reference time for the diagnosis unit 31 to use for determining a sign of an exhaust abnormality. The first reference time T1 is set shorter than the threshold value of the BC pressure exhaust time used for detecting the brake inactivity, and is set to, for example, 1 to 3 [sec]. Further, the second reference time T2 is a reference time for use by the diagnosis unit 31 for determining an exhaust abnormality, and is set longer than the first reference time T1. The second reference time T2 is set, for example, 1 to 2 [sec] longer than the first reference time T1. Further, the third reference time T3 is a reference time for the diagnostic unit 31 to use for determining the brake inflexibility, and is set longer than the second reference time T2. Further, the fourth reference time T4 is a reference time for the diagnosis unit 31 to use for determining an exhaust abnormality or a sign of an exhaust abnormality, and is set longer than the first reference time T1. Note that FIG. 3 shows an example in which the fourth reference time T4 is set as the same time (T3 = T4) as the third reference time T3, but the present invention is not limited to this. The fourth reference time T4 may be set longer than the first reference time T1, and may be set to the same time as the second reference time T2, for example. Further, the fourth reference time T4 may be set shorter than the second reference time T2, or may be set longer than the third reference time T3. The fifth reference time T5 is a reference time for the diagnosis unit 31 to use for determining an exhaust abnormality or a sign of an exhaust abnormality, and is set longer than the third reference time T3 and the fourth reference time T4. The first to fifth reference times T1 to T5 are recorded in advance in, for example, a recording unit (not shown) provided on the ground device 8. The first to fifth reference times T1 to T5 may be set for each brake control device 3. Further, the diagnostic unit 31 may acquire the first to fifth reference times T1 to T5 from the device on the upper side of the vehicle such as the brake control device 3 provided in the vehicle 2 via the on-board radio device 7.

In FIG. 3, the region that is less than the first reference time T1 after the brake command is released is defined as the normal region. Further, the region where the first reference time T1 or more and the second reference time T2 or less is defined as an exhaust abnormality sign region. Further, a region having a second reference time T2 or more and less than a third reference time T3 is defined as an exhaust abnormality region. The region of the second reference time T2 or more is a brake non-releasing region.

As shown in the exhaust time-BC pressure curve BR1 of FIG. 3, the diagnostic unit 31 has a first BC pressure exhaust time required from, for example, after the brake command is released until the BC pressure drops to the first reference pressure P1. If it is less than the reference time T1, that is, if it is within the normal region, it is determined that the BC exhaust time is normal. Further, as shown in the exhaust time-BC pressure curve BR2 in FIG. 3, the diagnostic unit 31 determines, for example, the BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the first reference pressure P1. When one reference time T1 or more and less than the second reference time T2, that is, when it is within the exhaust abnormality sign region, it is determined that there is a sign of an exhaust abnormality. Then, for example, when the diagnosis unit 31 determines that there is a sign of an exhaust abnormality, the diagnosis unit 31 generates and outputs a caution signal for calling attention. The ground device 8 displays information calling attention to the monitor display of the cab 9 of the vehicle 2 by transmitting the caution signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, for example.

Further, as shown in the exhaust time-BC pressure curve BR3 of FIG. 3, the diagnostic unit 31 determines, for example, the BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the first reference pressure P1. When it is equal to or more than the second reference time T2 and less than the third reference time T3, that is, when it is within the exhaust abnormality region, it is determined that there is an exhaust abnormality. Then, for example, when it is determined that there is an exhaust abnormality, the diagnosis unit 31 generates and outputs an abnormality signal for notifying the abnormality. The ground device 8 displays information for notifying the abnormality on the monitor display of the cab 9 of the vehicle 2 by transmitting the abnormality signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, for example. ..

Further, as shown in the exhaust time-BC pressure curve BR4 of FIG. 3, the diagnosis unit 31 has a BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the first reference pressure P1. 3 When the reference time is T3 or more, that is, when the brake is in the non-releasing region, it is determined that the brake is not released. Then, for example, when the diagnosis unit 31 determines that the brake is not relaxed, the diagnostic unit 31 generates a stop command for stopping the vehicle 2 together with a brake non-relaxation signal for notifying that the brake is not released. Output. For example, the ground device 8 transmits a brake non-release signal and a stop command output from the diagnostic unit 31 to the vehicle 2 via the network 6, so that the brake non-release signal is displayed on the monitor display of the cab 9 of the vehicle 2. Is displayed, and the vehicle 2 is stopped based on the stop command.

FIG. 4 is a diagram showing another example of measurement of the brake cylinder pressure / exhaust time by the monitoring system according to the first embodiment of the present disclosure. As described above, as shown in the exhaust time-BC pressure curve BR1 of FIG. 3, the diagnostic unit 31 has a BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the first reference pressure P1. If it is less than 1 reference time T1, that is, if it is within the normal region, it is determined that the BC exhaust time is normal. However, even if the BC exhaust time is less than the first reference time T1, there is a possibility that the BC pressure may not be properly exhausted for some reason thereafter. In FIG. 4, when the BC pressure exhaust time required for the BC pressure to drop to the first reference pressure P1 after the brake command is released is less than the first reference time T1, the diagnostic unit 31 has an exhaust abnormality or an exhaust abnormality. The exhaust time-BC pressure curve BR5 and the exhaust time-BC pressure curve BR6 showing the relationship between the BC pressure exhaust time and the BC pressure when it is determined to be a sign of the above are shown by broken lines.

As shown in the exhaust time-BC pressure curve BR5 of FIG. 4, the diagnostic unit 31 determines, for example, the BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the first reference pressure P1 as the first reference. When the time is less than T1, that is, when it is within the normal region, the BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the second reference pressure P2 is the fourth reference time T4 or more. Judge whether or not. When the diagnosis unit 31 determines that the BC pressure exhaust time required from the release of the brake command to the reduction of the BC pressure to the second reference pressure P2 is equal to or longer than the fourth reference time T4, the exhaust abnormality or the exhaust abnormality is abnormal. Judge that there is a sign of. Then, for example, when the diagnosis unit 31 determines that there is an exhaust abnormality or a sign of an exhaust abnormality, the diagnosis unit 31 generates and outputs an abnormality signal for notifying the exhaust abnormality or a caution signal for calling attention. The ground device 8 notifies the monitor display of the cab 9 of the vehicle 2 of the abnormality by transmitting the abnormality signal or the caution signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, for example. Or display information that calls attention. In the case shown in the exhaust time-BC pressure curve BR5 of FIG. 4, the diagnosis unit 31 determines whether the exhaust abnormality is determined or the sign of the exhaust abnormality is determined by the second reference pressure P2 and the second reference pressure. 4 It may be decided according to the value of the reference time T4.

As shown in the exhaust time-BC pressure curve BR6 of FIG. 4, the diagnostic unit 31 determines, for example, the BC pressure exhaust time required from the release of the brake command to the reduction of the BC pressure to the first reference pressure P1 as the first reference. When the time is less than T1, that is, the BC pressure exhaust time required from when the brake command is released until the BC pressure drops to the second reference pressure P2 is less than the fourth reference time T4. When the determination is made, it is determined whether or not the BC pressure detected by the BC pressure sensor 17 after the lapse of the fifth reference time T5 is equal to or higher than the third reference pressure P3. When the diagnostic unit 31 determines that the BC pressure detected by the BC pressure sensor 17 after the lapse of the fifth reference time T5 is equal to or higher than the third reference pressure P3, that is, when it determines that there is a residual pressure of the BC pressure. , It is determined that there is a possibility of SR pressure (compressed air pressure) leaking into the relay valve 14. Then, the diagnostic unit 31 generates and outputs, for example, a leak notification signal for notifying that there is a possibility of SR pressure leak. For example, the ground device 8 transmits a leak notification signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, so that the SR pressure leaks to the monitor display of the cab 9 of the vehicle 2. Display information notifying you that there is a possibility.

FIG. 5 is a diagram showing an example of measurement of the brake cylinder pressure exhaust time and the AC pressure exhaust time by the monitoring system according to the first embodiment of the present disclosure. For example, as shown in the exhaust time-BC pressure curve BR2 or the exhaust time-BC pressure curve BR3 in FIG. 5, the diagnosis unit 31 further determines that the exhaust abnormality is a sign or an exhaust abnormality, and further The AC pressure exhaust time is used to make a determination to identify the location that is the cause of the exhaust abnormality. In the lower figure of FIG. 5, the horizontal axis shows the AC pressure exhaust time indicating the elapsed time from when the brake command is released and the AC pressure which is the brake command pressure supplied to the relay valve 14 starts to be exhausted, and the vertical axis shows the AC pressure sensor. It shows the AC pressure detected by 16. Further, in FIG. 5, the exhaust time-AC pressure curve AR1 showing the relationship between the AC pressure exhaust time and the AC pressure in the normal state is shown by a solid line. Further, the exhaust time-AC pressure curve AR2 showing the relationship between the AC pressure exhaust time and the AC pressure at the time of a sign of an exhaust abnormality, and the exhaust time-AC pressure curve AR3 showing the relationship between the AC pressure exhaust time and the AC pressure at the time of an exhaust abnormality. Are shown by broken lines.

For example, as shown in the exhaust time-BC pressure curve BR2 or the exhaust time-BC pressure curve BR3 in FIG. 5, the diagnosis unit 31 determines that the exhaust abnormality is a sign or the exhaust abnormality, and then the brake command is released. It is determined whether or not the AC pressure exhaust time required for the AC pressure to drop to the first reference pressure P1 is equal to or longer than the first reference time T1. For example, as shown in the exhaust time-AC pressure curve AR1 of FIG. 5, the diagnosis unit 31 has a first AC pressure exhaust time required from when the brake command is released until the AC pressure drops to the first reference pressure P1. If it is less than the reference time T1 (not more than the first reference time T1), that is, if it is within the normal region, it is judged that the brake control valve 13 is properly exhausted, and the relay valve 14 is set. Judge that there is a related exhaust abnormality or a sign of an exhaust abnormality.

For example, as shown in the exhaust time-AC pressure curve AR2 and the exhaust time-AC pressure curve AR3 in FIG. 5, the diagnosis unit 31 lowers the AC pressure to the first reference pressure P1 after the brake command is released. When the AC pressure exhaust time required by Is determined.

6 and 7 are flowcharts showing an example of a flow of predicting an exhaust abnormality and determining an exhaust abnormality using the brake cylinder pressure exhaust time by the monitoring system according to the first embodiment of the present disclosure. Hereinafter, an example of the processing flow by the monitoring system 1 according to the first embodiment of the present disclosure will be described with reference to the flowcharts of FIGS. 6 and 7. As shown in FIG. 6, in step S101, the determination unit 26 of the monitoring system 1 determines whether or not the brake command has been released.

If the determination unit 26 determines in step S101 that the brake command has been released (Yes), in step S102, the exhaust time measurement unit 27 determines the BC pressure exhaust time and AC pressure after the brake command is released. Measure the exhaust time. In step S101, when the determination unit 26 determines that the brake command has not been released (Nо), the determination unit 26 again determines whether or not the brake command has been released. That is, the determination unit 26 repeats the determination of S101 until the brake command is released.

Next, in step S103, the determination unit 26 determines whether or not the BC pressure detected by the BC pressure sensor 17 has dropped to the first reference pressure P1 or less. In step S103, when the determination unit 26 determines that the BC pressure has dropped to the first reference pressure P1 or less (Yes), the BC pressure measured by the exhaust time measurement unit 27 after the brake command is released is the first. The BC pressure exhaust time required for the reference pressure to drop to P1 and the AC pressure exhaust time required for the AC pressure to drop to the first reference pressure P1 are transmitted to the diagnostic unit 31, and in step S104, the diagnostic unit 31 determines the BC. It is determined whether or not the pressure / exhaust time is equal to or longer than the first reference time T1. In step S103, when the determination unit 26 determines that the BC pressure has not decreased to the first reference pressure P1 or less (Nо), it again determines whether or not the BC pressure has decreased to the first reference pressure P1 or less. .. That is, the determination unit 26 repeats the determination of S103 until the BC pressure drops below the first reference pressure P1.

In step S104, when the diagnostic unit 31 determines that the BC pressure exhaust time is equal to or longer than the first reference time T1 (Yes), in step S105, the diagnostic unit 31 determines that the BC pressure exhaust time is the second reference time T2 or more. Judge whether or not it is the above. If the diagnostic unit 31 determines in step S105 that the BC pressure exhaust time is equal to or longer than the second reference time T2 (Yes), in step S106, the diagnostic unit 31 determines that the BC pressure exhaust time is the third reference time T3 or more. Judge whether or not it is the above.

In step S106, when the diagnostic unit 31 determines that the BC pressure exhaust time is equal to or longer than the third reference time T3 (Yes), in step S107, the diagnostic unit 31 determines that the brake is inflexible and brakes. A brake non-relaxation signal for notifying that the vehicle is inactive is generated and output.

Further, in step S106, when the diagnostic unit 31 determines that the BC pressure exhaust time is not equal to or longer than the third reference time T3 (Nо), in step S108, the diagnostic unit 31 determines the AC pressure after the brake command is released. It is determined whether or not the AC pressure exhaust time required for the pressure to drop to the first reference pressure P1 is equal to or longer than the first reference time T1. In step S108, when the diagnostic unit 31 determines that the AC pressure exhaust time is equal to or longer than the first reference time T1 (Yes), in step S109, the diagnostic unit 31 has an exhaust abnormality related to the brake control valve 13 side. For example, an abnormality signal for notifying that there is an exhaust abnormality related to the brake control valve 13 side is generated and output. In step S108, when the diagnostic unit 31 determines that the AC pressure exhaust time is not equal to or longer than the first reference time T1 (Nо), in step S110, the diagnostic unit 31 has an exhaust abnormality related to the relay valve 14 side. For example, an abnormality signal for notifying that there is an exhaust abnormality related to the relay valve 14 side is generated and output.

Further, in step S105, when the diagnostic unit 31 determines that the BC pressure exhaust time is not equal to or longer than the second reference time T2 (Nо), in step S111, the diagnostic unit 31 determines the AC pressure after the brake command is released. It is determined whether or not the AC pressure exhaust time required for the pressure to drop to the first reference pressure P1 is equal to or longer than the first reference time T1. In step S111, when the diagnostic unit 31 determines that the AC pressure exhaust time is equal to or longer than the first reference time T1 (Yes), in step S112, the diagnostic unit 31 causes an exhaust abnormality related to the brake control valve 13 side. For example, a caution signal for notifying that there is a sign of an exhaust abnormality related to the brake control valve 13 side is generated and output. If the diagnostic unit 31 determines in step S111 that the AC pressure exhaust time is not equal to or greater than the first reference time T1 (Nо), in step S113, the diagnostic unit 31 is a sign of an exhaust abnormality related to the relay valve 14 side. For example, a caution signal for notifying that there is a sign of an exhaust abnormality related to the relay valve 14 side is generated and output.

Further, in step S104, when the diagnostic unit 31 determines that the BC pressure exhaust time is not equal to or longer than the first reference time T1 (Nо), in step S114 shown in FIG. 7, the diagnostic unit 31 has a second BC pressure. It is determined whether or not the pressure has dropped to the reference pressure P2. Note that FIG. 7 shows the details of the process A after (Nо) when the diagnostic unit 31 determines that the BC pressure / exhaust time is not equal to or longer than the first reference time T1 in the process of step S104 of FIG. be.

If the diagnostic unit 31 determines in step S114 that the BC pressure has dropped to the second reference pressure P2 (Yes), in step S115, the diagnostic unit 31 determines that the BC pressure is the second reference after the brake command is released. It is determined whether or not the BC pressure exhaust time required for the pressure to drop to P2 is equal to or longer than the fourth reference time T4. In step S114, when the diagnosis unit 31 determines that the BC pressure has not decreased to the second reference pressure P2 or less (Nо), it again determines whether or not the BC pressure has decreased to the second reference pressure P2 or less. .. That is, the determination unit 26 repeats the determination of S114 until the BC pressure drops below the second reference pressure P2.

If the diagnostic unit 31 determines in step S115 that the BC pressure exhaust time is equal to or longer than the fourth reference time T4 (Yes), the diagnostic unit 31 determines in step S116 that there is a sign of an exhaust abnormality. Further, in step S115, when the diagnostic unit 31 determines that the BC pressure exhaust time is not equal to or longer than the fourth reference time T4 (Nо), in step S117, the diagnostic unit 31 determines that the BC pressure exhaust time is not equal to or longer than the fourth reference time T4. It is judged whether or not it is T5 or more.

In step S117, when the diagnostic unit 31 determines that the BC pressure exhaust time is the fifth reference time T5 or more (Yes), in step S118, the diagnostic unit 31 determines that the BC pressure is the third reference pressure P3 or more. Determine if there is. In step S117, when the diagnosis unit 31 determines that the BC pressure exhaust time is not the fifth reference time T5 or more (Nо), the diagnosis unit 31 again determines that the BC pressure exhaust time is the fifth reference time T5 or more. Judge whether or not. That is, the determination unit 26 repeats the determination of S117 until the BC pressure / exhaust time becomes the fifth reference time T5 or more.

If the diagnostic unit 31 determines in step S118 that the BC pressure is equal to or higher than the third reference pressure P3 (Yes), in step S119, the diagnostic unit 31 can leak the SR pressure to the relay valve 14. Judged as having sex. If the diagnostic unit 31 determines in step S118 that the BC pressure is not equal to or higher than the third reference pressure P3 (Nо), the diagnostic unit 31 determines in step S120 that the BC pressure is normal. If, in step S103, the diagnostic unit 31 determines that the BC pressure has not dropped to the first reference pressure P1 or less (Nо), it checks again whether the BC pressure has dropped to the first reference pressure P1 or less. Although it is determined, when the BC pressure exhaust time becomes equal to or longer than the third reference time T3 for determining the brake non-relaxation, the process of step S103 is stopped and the brake non-relaxation is determined. Is also good. Further, in step S114, when the diagnostic unit 31 determines that the BC pressure has not dropped to the second reference pressure P2 or less (Nо), it checks again whether the BC pressure has dropped to the second reference pressure P2 or less. Although it is judged, if the BC pressure exhaust time becomes the fifth reference time T5 or more, the process of step S114 may be stopped and the brake may not be released or the SR pressure may leak to the relay valve 14. It may be determined that.

According to the monitoring system 1 according to the first embodiment of the present disclosure, BC indicating the pressure of the brake cylinder 24 of the brake device 18 that generates the mechanical braking force by pressing the wheel control element 25 against the wheels 19 provided on the vehicle 2. The BC pressure sensor 17 that detects the pressure and the BC pressure that is detected by the BC pressure sensor 17 after the brake command is released in the state where the vehicle 2 is stopped and the brake command is input are predetermined. The exhaust time measuring unit 27 that measures the BC pressure exhaust time required to drop to the first reference pressure P1 and the BC pressure exhaust time measured by the exhaust time measuring unit 27 are the predetermined first reference time T1 or more. In this case, since the diagnostic unit 31 for determining that there is a sign of an exhaust abnormality or an exhaust abnormality is provided, it is possible to detect a sign of an exhaust abnormality or an exhaust abnormality at a stage before the brake is inflexible.

According to the monitoring system 1 according to the first embodiment of the present disclosure, when the BC pressure exhaust time is longer than the first reference time T1 and is equal to or longer than the second reference time T2, the diagnosis unit 31 has an exhaust abnormality. If it is determined that there is, and the BC pressure exhaust time is equal to or greater than the first reference time T1 and less than the second reference time T2, it is determined that there is a sign of an exhaust abnormality. It is possible to detect in more detail whether it is a sign of an abnormality or an exhaust abnormality.

According to the monitoring system 1 according to the first embodiment of the present disclosure, when the BC pressure / exhaust time is longer than the second reference time T2 and is equal to or longer than the third reference time T3, the diagnostic unit 31 does not release the brake. Therefore, even if the brake is not loosened, it can be appropriately detected.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the exhaust time measuring unit 27 is the BC after the brake command is released when the vehicle 2 is stopped at the station or when the vehicle is inspected for delivery. By measuring the pressure / exhaust time, the BC pressure / exhaust time can be measured without being affected by the regenerative brake. Therefore, the brake control valve 13 or the relay valve 14, which is an air control unit of the brake control device 3, can be used. It is possible to grasp that a related exhaust abnormality or a sign of an exhaust abnormality has occurred.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the AC pressure sensor 16 for detecting the AC pressure indicating the pressure of the compressed air supplied from the brake control valve 13 to the relay valve 14 as the brake command pressure is provided. The exhaust time measuring unit 27 measures the AC pressure exhaust time required from when the brake command is released until the AC pressure detected by the AC pressure sensor 16 drops to the first reference pressure P1 in the state where the brake command is input. Then, when the BC pressure exhaust time is the first reference time T1 or more, the diagnosis unit 31 determines whether or not the AC pressure exhaust time is the first reference time T1 or more, and the AC pressure exhaust time is the first. If the reference time is not T1 or more, it is determined that there is a sign of an exhaust abnormality or an exhaust abnormality related to the relay valve 14, so that a sign of an exhaust abnormality or an exhaust abnormality related to the relay valve 14 in the stage before the brake becomes inflexible is detected. Can be detected.

According to the monitoring system 1 according to the first embodiment of the present disclosure, when the AC pressure exhaust time is equal to or longer than the first reference time T1, the diagnosis unit 31 causes an exhaust abnormality or an exhaust abnormality related to the brake control valve 13. Since it is determined that there is a sign, it is possible to detect an exhaust abnormality or a sign of an exhaust abnormality related to the brake control valve 13 in the stage before the brake becomes inactive.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the exhaust time measuring unit 27 sets the BC pressure measured by the BC pressure sensor 17 to the second reference pressure P2 which is set lower than the first reference pressure P1. The BC pressure exhaust time required to decrease is measured, and when the BC pressure exhaust time is longer than the first reference time T1 and is equal to or longer than the fourth reference time T4, the diagnostic unit 31 is a sign of an exhaust abnormality or an exhaust abnormality. Since it is determined that there is, it is possible to more accurately detect an exhaust abnormality or a sign of an exhaust abnormality in the stage before the brake becomes inflexible.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the diagnostic unit 31 uses the BC pressure sensor 16 when the fifth reference time T5, which is set longer than the third reference time T3 and the fourth reference time T4, elapses. If the measured BC pressure is equal to or higher than the third reference pressure P3, which is set lower than the second reference pressure P2, it is determined that the SR pressure may leak to the relay valve 14, so the BC pressure Even if there is residual pressure, it can be detected appropriately.

According to the monitoring system 1 according to the first embodiment of the present disclosure, since the data storage unit 30 for accumulating the BC pressure exhaust time measured by the exhaust time measurement unit 27 is provided, a plurality of past BC pressure exhaust times are used. Therefore, it is possible to determine the exhaust abnormality or the sign of the exhaust abnormality.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the position information acquisition unit 28 for acquiring the position information of the vehicle 2 is provided, and the data storage unit 30 is set by the exhaust time measurement unit 27 at the BC pressure exhaust time. Since the position information of the vehicle 2 acquired by the position information acquisition unit 28 when the BC pressure / exhaust time is measured is linked and accumulated, it is possible to grasp where the BC pressure / exhaust time is when the vehicle 2 is stopped. can do.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the temperature sensor 23 for detecting the temperature information around the brake device 18 is provided, and the data storage unit 30 has the BC pressure exhaust time and the exhaust time measurement unit 27. Since the temperature information detected by the temperature sensor 23 when the BC pressure exhaust time is measured is accumulated in association with the temperature sensor 23, it is possible to grasp how much the temperature around the brake device 18 is when the BC pressure exhaust time is. be able to.

In the monitoring system 1 according to the first embodiment, as shown in FIG. 1, an example in which the data storage unit 30 and the diagnosis unit 31 are provided on the ground device 8 is shown, but the data storage unit 30 and the diagnosis unit are shown. The 31 is not limited to being provided in the ground device 8, and may be configured to be provided in, for example, a brake control device 3 or a central device 5 provided in the vehicle 2.

Further, in the monitoring system 1 according to the first embodiment, as shown in FIGS. 3 to 5, the diagnosis unit 31 is in a state where the vehicle 2 is stopped and a brake command is input by the determination unit 26. In this state, when it is determined that the brake command has been released, an example is shown in which an exhaust abnormality or a sign of an exhaust abnormality is determined using one BC pressure exhaust time measured by the exhaust time measuring unit 27. There is. However, the diagnosis unit 31 acquires a plurality of BC pressure exhaust times measured by the exhaust time measurement unit 27 within a predetermined first period, and determines the tendency of the BC pressure exhaust time within the first period. By requesting, the exhaust abnormality or the sign of the exhaust abnormality may be determined. The first period is, for example, a period of one week or one month, but is not particularly limited, and may be a period of one day or one year.

FIG. 8 is a diagram showing an example of a change over time in the brake cylinder pressure / exhaust time. In FIG. 8, the horizontal axis shows the date, and the vertical axis shows the BC pressure exhaust time required from when the brake command is released until the BC pressure detected by the BC pressure sensor 17 drops to the first reference pressure P1. The BC pressure / exhaust time may be, for example, the BC pressure / exhaust time measured by the exhaust time measuring unit 27 every time the vehicle 2 is inspected for delivery, or may be measured by the exhaust time measuring unit 27 every time the vehicle 2 stops at the station. It may be a statistical value such as an average value of BC pressure exhaust time in one day. FIG. 8 shows the BC pressure exhaust time for 10 days as an example. In FIG. 8, the date on the horizontal axis is expressed as the 1st to 10th days, but the date may be expressed as the date. The diagnostic unit 31 does not necessarily have to acquire the BC pressure / exhaust time for each day, and obtains the BC pressure / exhaust time for each predetermined period (for example, every week) set shorter than the first period. You may try to get it. Further, the diagnosis unit 31 may acquire statistical values such as an average value of a plurality of BC pressure exhaust times measured by the exhaust time measurement unit 27 during a predetermined period. The plurality of BC pressure exhaust times measured by the exhaust time measuring unit 27 are, for example, vehicle identification information of the vehicle 2, device identification information of the brake device 18, device identification information of the brake control device 3, train position information, and environmental information. , Temperature information, date and time information, brake command information, door opening / closing information, and the like, and are stored in the data storage unit 30 included in the ground device 8. For example, as shown in FIG. 8, the diagnosis unit 31 may obtain a tendency over time by estimating a tendency or the like using the BC pressure / exhaust time within the first period. In addition, the diagnostic unit 31 combines information such as environmental information and temperature information stored in the data storage unit 30 together with a plurality of BC pressure / exhaust times to perform machine learning, thereby causing an exhaust abnormality or an exhaust abnormality. A sign diagnosis may be made.

Further, the diagnosis unit 31 is, for example, a predetermined number of times or more within the exhaust abnormality sign region where the BC pressure exhaust time in the first period is equal to or longer than the first reference time T1 and less than the second reference time T2. Alternatively, if it is contained in a predetermined ratio or more, it may be determined that there is a sign of an exhaust abnormality related to BC pressure.

Embodiment 2.
Next, the monitoring system 1 according to the second embodiment of the present disclosure will be described. FIG. 9 is a block diagram showing an example of the configuration of the brake control device according to the second embodiment of the present disclosure. The same components as those of the monitoring system 1 according to the first embodiment of the present disclosure are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 9, the brake control device 3 of the monitoring system 1 according to the second embodiment includes the air supply time measuring unit 32 instead of the exhaust time measuring unit 27, as shown in FIG. It is different from the brake control device 3 of the monitoring system 1 according to the above. Further, the monitoring system 1 according to the second embodiment is different from the monitoring system 1 according to the first embodiment in that the diagnosis unit 31 determines the air supply abnormality or the sign of the air supply abnormality. In the brake control device 3 of the monitoring system 1 according to the second embodiment, for simplification of the explanation, the control unit 12 shows an example in which the exhaust time measurement unit 27 is not provided, but the air supply time measurement is performed. The exhaust time measuring unit 27 may be provided together with the unit 32.

FIG. 10 is a diagram showing an example of measurement of the brake cylinder pressure supply time by the monitoring system according to the second embodiment of the present disclosure. In FIG. 10, the brake cylinder pressure supply time (hereinafter referred to as “BC pressure supply time”) indicating the elapsed time from the time when the brake command is input on the horizontal axis and the BC pressure starts to be supplied to the brake cylinder 24, and the vertical axis thereof. Indicates the BC pressure detected by the BC pressure sensor 17. The determination unit 26 determines whether or not the brake command (brake notch signal) has been input, for example, when the vehicle 2 is stopped and the brake command has not been input (brake yurume). The state in which the vehicle 2 is stopped includes, for example, the time of delivery inspection of the vehicle 2, but is not limited to this. As shown in FIG. 3, when the brake command is input, the BC pressure is supplied to the brake cylinder 24, so that the BC pressure starts to rise. When the determination unit 26 determines that the brake command has been input, for example, the determination unit 26 notifies the air supply time measurement unit 32 of a brake command input signal indicating that the brake command has been input.

As shown in FIG. 10, the air supply time measuring unit 32 measures the BC pressure air supply time after the brake command is input. More specifically, when the air supply time measuring unit 32 receives the brake command input signal from the determination unit 26, the BC pressure detected by the BC pressure sensor 17 first rises to a predetermined fourth reference pressure P4. Measure the BC pressure supply time required for. The fourth reference pressure P4 is a value set lower than the target brake cylinder pressure (hereinafter, referred to as “target BC pressure”) with respect to the brake command, and is set to, for example, a value of 50 to 70% of the target BC pressure. The target BC pressure can be calculated by the control unit 12, for example, based on the brake command and the AS pressure. In addition, the air supply time measuring unit 32 also measures the BC pressure air supply time required for the BC pressure detected by the BC pressure sensor 17 to rise to the predetermined fifth reference pressure P5 and sixth reference pressure P6, respectively. .. The fifth reference pressure P5 is a pressure value set higher than the fourth reference pressure P4, and the sixth reference pressure P6 is a pressure value set higher than the fifth reference pressure P5. The fifth reference pressure P5 may be set higher than the fourth reference pressure P4 and is not particularly limited. For example, half of the difference between the target BC pressure and the fourth reference pressure P4 is the fourth reference pressure. It is set to the value added to P4. Further, the sixth reference pressure P6 may be set higher than the fifth reference pressure P5, and is not particularly limited, but is set lower than, for example, the target BC pressure.

Similarly, the air supply time measuring unit 32 measures the AC pressure air supply time after the brake command is input. More specifically, when the air supply time measuring unit 32 receives the brake command input signal from the determination unit 26, the AC pressure required for the AC pressure detected by the AC pressure sensor 16 to rise to the fourth reference pressure P4 is first generated. Measure the air supply time. Further, the air supply time measuring unit 32 also measures the AC pressure air supply time required for the AC pressure detected by the AC pressure sensor 16 to rise to the fifth reference pressure P5 and the sixth reference pressure P6, respectively.

Further, in the control unit 12, for example, the train position information when it is determined by the determination unit 26 that the brake command has been input to the BC pressure air supply time and the AC pressure air supply time measured by the air supply time measurement unit 32. , Environmental information, temperature information, date and time information, brake command information, door opening / closing information, and other information are linked. Further, the control unit 12 further links the vehicle identification information of the vehicle 2 on which the brake device 18 is mounted, the device identification information of the brake device 18, and the device identification information of the brake control device 3 to the vehicle. It is transmitted to the ground device 8 via the upper radio device 7.

As shown in FIG. 1, the ground device 8 includes a data storage unit 30 and a diagnosis unit 31. The data storage unit 30 stores the BC pressure supply time, the AC pressure supply time, and the like transmitted from the vehicle 2. The data storage unit 30 also stores information acquired by the brake control device 3 mounted on the vehicle 2 constituting the train other than the vehicle 2 constituting the train in a distinguishable state. The diagnosis unit 31 uses, for example, the BC pressure air supply time or the like to determine an air supply abnormality or a sign of an air supply abnormality related to the BC pressure air supply operation. The diagnosis unit 31 acquires the BC pressure air supply time and the AC pressure air supply time from the data storage unit 30, for example.

In FIG. 10, the supply time-BC pressure curve BA1 showing the relationship between the normal BC pressure supply time and the BC pressure is shown by a solid line. In addition, the air supply time showing the relationship between the BC pressure air supply time and the BC pressure at the time of a sign of an abnormal air supply-BC pressure curve BA2, the air supply time showing the relationship between the BC pressure air supply time and the BC pressure at the time of an abnormal air supply- The BC pressure curve BA3 and the air supply time-BC pressure curve BA4 showing the relationship between the BC pressure air supply time and the BC pressure when the brake is insufficient are shown by broken lines.

Further, the sixth reference time T6 shown in FIG. 10 is a reference time for the diagnosis unit 31 to use for determining a sign of an air supply abnormality. The sixth reference time T6 is set shorter than the threshold value of the BC pressure supply time used for detecting the brake shortage, and is set to, for example, 1 to 3 [sec]. Further, the seventh reference time T7 is a reference time for use by the diagnosis unit 31 for determining an air supply abnormality, and is set longer than the sixth reference time T6. The seventh reference time T7 is set to be 1 to 2 [sec] longer than the sixth reference time T6, for example. Further, the eighth reference time T8 is a reference time for the diagnostic unit 31 to use for determining the brake shortage, and is set longer than the seventh reference time T7. Further, the ninth reference time T9 is a reference time for use by the diagnosis unit 31 for determining an air supply abnormality or a sign of an air supply abnormality, and is set longer than the sixth reference time T6. Note that FIG. 10 shows an example in which the ninth reference time T9 is set as the same time (T8 = T9) as the eighth reference time T8, but the present invention is not limited to this. The ninth reference time T9 may be set longer than the sixth reference time T6, and may be set to the same time as the seventh reference time T7, for example. Further, the ninth reference time T9 may be set shorter than the seventh reference time T7, or may be set longer than the eighth reference time T8. The tenth reference time T10 is a reference time for use by the diagnosis unit 31 for determining an air supply abnormality or a sign of an air supply abnormality, and is set longer than the eighth reference time T8 and the ninth reference time T9. The sixth to tenth reference times T6 to T10 are recorded in advance in, for example, a recording unit (not shown) provided in the ground device 8. The sixth to tenth reference times T6 to T10 may be set for each brake control device 3. Further, the diagnostic unit 31 may acquire the sixth to tenth reference times T6 to T10 from the device on the upper side of the vehicle such as the brake control device 3 provided in the vehicle 2 via the on-board radio device 7. Further, the sixth to tenth reference times T6 to T10 may be changed according to the value of the target BC pressure calculated by the control unit 12.

In FIG. 10, the region that is less than the fourth reference time T4 after the brake command is input is defined as the normal region. Further, a region having a fourth reference time T4 or more and a fifth reference time T5 or less is defined as an air supply abnormality sign region. Further, a region having a fifth reference time T5 or more and a sixth reference time T6 or less is defined as an air supply abnormal region. Further, the region of the sixth reference time T6 or more is defined as the brake shortage region.

As shown in the air supply time-BC pressure curve BA1 in FIG. 10, the diagnostic unit 31 determines, for example, the BC pressure air supply time required from the input of the brake command to the rise of the BC pressure to the fourth reference pressure P4. If it is less than the sixth reference time T6, that is, if it is within the normal region, it is determined that the BC air supply time is normal. Further, as shown in the air supply time-BC pressure curve BA2 in FIG. 10, the diagnostic unit 31 determines, for example, the BC pressure air supply time required from the input of the brake command until the BC pressure rises to the fourth reference pressure P4. Is greater than or equal to the 6th reference time T6 and less than the 7th reference time T7, that is, when the air is within the air supply abnormality sign region, it is determined that there is a sign of the air supply abnormality. Then, for example, when the diagnosis unit 31 determines that there is a sign of an air supply abnormality, the diagnosis unit 31 generates and outputs a caution signal for calling attention. The ground device 8 displays information calling attention to the monitor display of the cab 9 of the vehicle 2 by transmitting the caution signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, for example.

Further, as shown in the supply time-BC pressure curve BA3 in FIG. 10, the diagnostic unit 31 requires BC pressure supply air, for example, from the input of the brake command to the rise of the BC pressure to the fourth reference pressure P4. When the time is equal to or greater than the 7th reference time T7 and less than the 8th reference time T8, that is, when the time is within the air supply abnormality region, it is determined that there is an air supply abnormality. Then, for example, when it is determined that there is an air supply abnormality, the diagnosis unit 31 generates and outputs an abnormality signal for notifying the abnormality. The ground device 8 displays information for notifying the abnormality on the monitor display of the cab 9 of the vehicle 2 by transmitting the abnormality signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, for example. ..

Further, as shown in the air supply time-BC pressure curve BA4 in FIG. 10, the diagnosis unit 31 requires, for example, the BC pressure air supply time required from the input of the brake command to the rise of the BC pressure to the fourth reference pressure P4. Is equal to or greater than the eighth reference time T8, that is, if it is within the brake shortage region, it is determined that the brake is insufficient. Then, for example, when it is determined that the brake is insufficient, the diagnosis unit 31 generates and outputs a brake shortage signal for notifying that the brake is insufficient. The ground device 8 transmits, for example, a brake shortage signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, so that the monitor display of the driver's cab 9 of the vehicle 2 is notified of the brake shortage. indicate.

FIG. 11 is a diagram showing another example of measurement of the brake cylinder pressure supply time by the monitoring system according to the second embodiment of the present disclosure. As described above, as shown in the air supply time-BC pressure curve BA1 in FIG. 10, the diagnosis unit 31 requires the BC pressure air supply time from the input of the brake command to the rise of the BC pressure to the fourth reference pressure P4. Is less than the sixth reference time T6, that is, if it is within the normal region, it is determined that the BC air supply time is normal. However, even if the BC air supply time is less than the sixth reference time T6, there is a possibility that the BC pressure may not be properly supplied after that for some reason. In FIG. 11, when the BC pressure air supply time required for the BC pressure to rise to the fourth reference pressure P4 after the brake command is input is less than the sixth reference time T6, the diagnostic unit 31 has an abnormal air supply or The supply time-BC pressure curve BA5 and the supply time-BC pressure curve BA6 showing the relationship between the BC pressure supply time and the BC pressure when it is determined to be a sign of an abnormal supply air are shown by broken lines.

As shown in the exhaust time-BC pressure curve BA5 in FIG. 11, the diagnostic unit 31 has, for example, the BC pressure supply time required from the input of the brake command to the rise of the BC pressure to the fourth reference pressure P4. When the reference time is less than T6, that is, when the pressure is within the normal region, the BC pressure supply time required from the input of the brake command to the rise of the BC pressure to the fifth reference pressure P5 is the ninth reference time T9 or more. Judge whether or not. When the diagnosis unit 31 determines that the BC pressure air supply time required from the input of the brake command to the rise of the BC pressure to the fifth reference pressure P5 is equal to or longer than the ninth reference time T9, an air supply abnormality or an air supply abnormality occurs. Judge that there is a sign of abnormal air supply. Then, for example, when the diagnosis unit 31 determines that there is an air supply abnormality or a sign of an air supply abnormality, the diagnosis unit 31 generates an abnormality signal for notifying the air supply abnormality or a caution signal for calling attention and outputs the output. do. The ground device 8 notifies the monitor display of the cab 9 of the vehicle 2 of the abnormality by transmitting the abnormality signal or the caution signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, for example. Or display information that calls attention. In the case shown in the air supply time-BC pressure curve BA5 of FIG. 4, the diagnosis unit 31 determines whether the air supply abnormality is determined or the sign of the air supply abnormality is determined by the fifth reference pressure. It may be decided according to the values of P5 and the ninth reference time T9.

As shown in the exhaust time-BC pressure curve BA6 in FIG. 11, the diagnostic unit 31 has, for example, the BC pressure supply time required from the input of the brake command to the rise of the BC pressure to the fourth reference pressure P4. When the reference time is less than T6, that is, the BC pressure supply time required from the input of the brake command to the rise of the BC pressure to the fifth reference pressure P5 is less than the ninth reference time T9. When it is determined that the pressure is, it is determined whether or not the BC pressure detected by the BC pressure sensor 17 after the lapse of the 10th reference time T10 is equal to or less than the 6th reference pressure P6. When the diagnostic unit 31 determines that the BC pressure detected by the BC pressure sensor 17 after the lapse of the 10th reference time T10 is equal to or less than the 6th reference pressure P6, that is, when it determines that there is an insufficient BC pressure. , It is determined that there is a possibility that compressed air is leaking to the atmosphere side from the piping of the relay valve 14 or the brake cylinder 24. Then, the diagnostic unit 31 generates and outputs, for example, a leak notification signal for notifying that there is a possibility of leakage of compressed air. For example, the ground device 8 transmits a leak notification signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, so that the compressed air leaks to the monitor display of the cab 9 of the vehicle 2. Display information notifying you that there is a possibility.

FIG. 12 is a diagram showing an example of measurement of the brake cylinder pressure supply time and the AC pressure supply time by the monitoring system according to the second embodiment of the present disclosure. For example, as shown in the air supply time-BC pressure curve BA2 or the air supply time-BC pressure curve BA3 in FIG. 12, the diagnosis unit 31 further determines that the air supply abnormality is a sign or the air supply abnormality. The AC pressure air supply time is used to make a determination to identify the location that is the cause of the air supply abnormality or the cause of the air supply abnormality. In the lower figure of FIG. 12, the horizontal axis is the AC pressure supply time indicating the elapsed time from when the brake command pressure, which is the brake command pressure supplied to the relay valve 14, is started to be supplied, and the vertical axis is AC. The AC pressure detected by the pressure sensor 16 is shown. Further, in FIG. 12, the supply time-AC pressure curve AA1 showing the relationship between the normal AC pressure supply time and the AC pressure is shown by a solid line. In addition, the air supply time-AC pressure curve AA2 showing the relationship between the AC pressure air supply time and the AC pressure at the time of a sign of an abnormal air supply, and the air supply showing the relationship between the AC pressure air supply time and the AC pressure at the time of an abnormal air supply. The time-AC pressure curve AA3 is shown by a broken line.

For example, as shown in the air supply time-BC pressure curve BA2 or the air supply time-BC pressure curve BA3 in FIG. 12, the diagnosis unit 31 issues a brake command when it determines that the air supply abnormality is a sign or the air supply abnormality. It is determined whether or not the AC pressure air supply time required from the input to the rise of the AC pressure to the fourth reference pressure P4 is equal to or longer than the sixth reference time T6. For example, as shown in the air supply time-AC pressure curve AA1 in FIG. 12, the diagnosis unit 31 takes an AC pressure air supply time from when the brake command is input until the AC pressure rises to the fourth reference pressure P4. If it is less than the 6th reference time T6 (not more than the 6th reference time T6), that is, if it is within the normal region, it is judged that the air supply on the brake control valve 13 side is performed correctly, and the relay valve is used. It is determined that there is an air supply abnormality or a sign of an air supply abnormality related to the 14 side.

For example, as shown in the air supply time-AC pressure curve AA2 and the air supply time-AC pressure curve AA3 in FIG. 12, the diagnosis unit 31 sets the AC pressure to the fourth reference pressure P4 after the brake command is input. When the AC pressure air supply time required to start up is the sixth reference time T6 or more, that is, in the air supply abnormality sign area or the air supply abnormality area, the air supply abnormality or supply related to the brake control valve 13 side Judge that there is a sign of abnormalities.

13 and 14 are flowcharts showing an example of a flow of predicting an air supply abnormality and determining an air supply abnormality using the brake cylinder pressure air supply time by the monitoring system according to the second embodiment of the disclosure. Hereinafter, an example of the processing flow by the monitoring system 1 according to the second embodiment of the present disclosure will be described with reference to the flowcharts of FIGS. 13 and 14. As shown in FIG. 13, in step S201, the determination unit 26 of the monitoring system 1 determines whether or not the brake command has been input.

If the determination unit 26 determines in step S201 that the brake command has been input (Yes), in step S202, the air supply time measuring unit 32 determines that the BC pressure air supply time and the BC pressure air supply time since the brake command was input. Measure the AC pressure supply time. In step S201, when the determination unit 26 determines that the brake command has not been input (Nо), the determination unit 26 determines again whether or not the brake command has been input. That is, the determination unit 26 repeats the determination of S201 until the brake command is input.

Next, in step S203, the determination unit 26 determines whether or not the BC pressure detected by the BC pressure sensor 17 has risen to the fourth reference pressure P4 or higher. In step S203, when the determination unit 26 determines that the BC pressure has risen to the fourth reference pressure P4 or higher (Yes), the BC pressure measured by the air supply time measurement unit 32 after the brake command is input is the first. The BC pressure air supply time required for the 4 reference pressure P4 to rise and the AC pressure air supply time required for the AC pressure to rise to the 4th reference pressure P4 are transmitted to the diagnosis unit 31, and in step S204, the diagnosis unit 31 Determines whether or not the BC pressure supply time is equal to or longer than the sixth reference time T6. In step S203, when the determination unit 26 determines that the BC pressure has not risen to the fourth reference pressure P4 or higher (Nо), it again determines whether the BC pressure has risen to the fourth reference pressure P4 or higher. .. That is, the determination unit 26 repeats the determination of S203 until the BC pressure rises above the fourth reference pressure P4.

If the diagnostic unit 31 determines in step S204 that the BC pressure air supply time is equal to or longer than the sixth reference time T6 (Yes), in step S205, the diagnostic unit 31 determines that the BC pressure air supply time is the seventh reference time. It is determined whether or not the time is T7 or more. If the diagnostic unit 31 determines in step S205 that the BC pressure air supply time is equal to or longer than the seventh reference time T7 (Yes), in step S206, the diagnostic unit 31 determines that the BC pressure air supply time is the eighth reference time. It is determined whether or not the time is T8 or more.

In step S206, when the diagnostic unit 31 determines that the BC pressure air supply time is equal to or longer than the eighth reference time T8 (Yes), in step S207, the diagnostic unit 31 determines that the brake is insufficient and brakes. Generates and outputs a brake shortage signal to notify that the brake is insufficient.

Further, in step S206, when the diagnosis unit 31 determines that the BC pressure supply time is not equal to or longer than the eighth reference time T8 (Nо), in step S208, the diagnosis unit 31 performs AC after the brake command is input. It is determined whether or not the AC pressure air supply time required for the pressure to rise to the fourth reference pressure P4 is equal to or longer than the sixth reference time T6. If the diagnostic unit 31 determines in step S208 that the AC pressure air supply time is equal to or longer than the sixth reference time T6 (Yes), in step S209, the diagnostic unit 31 supplies the brake control valve 13 side. It is determined that there is an air abnormality, and for example, an abnormality signal for notifying that there is an air supply abnormality related to the brake control valve 13 side is generated and output. In step S208, when the diagnostic unit 31 determines that the AC pressure air supply time is not equal to or longer than the sixth reference time T6 (Nо), in step S210, the diagnostic unit 31 causes an air supply abnormality related to the relay valve 14 side. For example, an abnormality signal for notifying that there is an air supply abnormality related to the relay valve 14 side is generated and output.

Further, in step S205, when the diagnosis unit 31 determines that the BC pressure supply time is not equal to or longer than the seventh reference time T7 (Nо), in step S211, the diagnosis unit 31 performs AC after the brake command is input. It is determined whether or not the AC pressure air supply time required for the pressure to rise to the fourth reference pressure P4 is equal to or longer than the sixth reference time T6. If the diagnostic unit 31 determines in step S211 that the AC pressure air supply time is equal to or longer than the sixth reference time T6 (Yes), in step S212, the diagnostic unit 31 supplies the brake control valve 13 side. It is determined that there is a sign of air abnormality, and for example, a caution signal for notifying that there is a sign of air supply abnormality related to the brake control valve 13 side is generated and output. When the diagnostic unit 31 determines in step S211 that the AC pressure air supply time is not equal to or longer than the sixth reference time T6 (Nо), in step S213, the diagnostic unit 31 causes an air supply abnormality related to the relay valve 14 side. It is determined that there is a sign of the above, and for example, a caution signal for notifying that there is a sign of an air supply abnormality related to the relay valve 14 side is generated and output.

Further, in step S204, when the diagnostic unit 31 determines that the BC pressure air supply time is not equal to or longer than the sixth reference time T6 (Nо), in step S214 shown in FIG. 14, the diagnostic unit 31 has a BC pressure of the sixth. 5 Judge whether or not the pressure has risen to the reference pressure P5. Note that FIG. 14 shows the details of the process B after (Nо) when the diagnostic unit 31 determines that the BC pressure supply time is not equal to or longer than the sixth reference time T6 in the process of step S204 of FIG. Is.

If the diagnostic unit 31 determines in step S214 that the BC pressure has risen to the fifth reference pressure P5 (Yes), in step S215, the diagnostic unit 31 determines that the BC pressure is the fifth reference after the brake command is input. It is determined whether or not the BC pressure supply time required to rise to the pressure P5 is equal to or longer than the ninth reference time T9. In step S214, when the diagnosis unit 31 determines that the BC pressure has not risen to the fifth reference pressure P5 or higher (Nо), it again determines whether the BC pressure has dropped to the fifth reference pressure P5 or higher. .. That is, the determination unit 26 repeats the determination of S214 until the BC pressure rises above the fifth reference pressure P5.

If the diagnostic unit 31 determines in step S215 that the BC pressure air supply time is equal to or longer than the ninth reference time T9 (Yes), the diagnostic unit 31 determines in step S216 that there is a sign of an air supply abnormality. do. Further, in step S215, when the diagnosis unit 31 determines that the BC pressure air supply time is not equal to or longer than the ninth reference time T9 (Nо), in step S217, the diagnosis unit 31 determines that the BC pressure air supply time is not equal to or longer than the ninth reference time T9 (Nо). It is determined whether or not the reference time is T10 or more.

If the diagnostic unit 31 determines in step S217 that the BC pressure air supply time is equal to or greater than the tenth reference time T10 (Yes), in step S218, the diagnostic unit 31 determines that the BC pressure is equal to or less than the sixth reference pressure P6. Judge whether or not. In step S217, when the diagnosis unit 31 determines that the BC pressure air supply time is not the 10th reference time T10 or more (Nо), the diagnosis unit 31 again determines that the BC pressure air supply time is not the 10th reference time T10 or more. Judge whether or not. That is, the determination unit 26 repeats the determination of S217 until the BC pressure supply time reaches the tenth reference time T10 or more.

If the diagnostic unit 31 determines in step S218 that the BC pressure is equal to or lower than the sixth reference pressure P6 (Yes), the diagnostic unit 31 may have leaked compressed air to the atmosphere side in step S219. It is determined that there is. If the diagnostic unit 31 determines in step S218 that the BC pressure is not equal to or less than the sixth reference pressure P6 (Nо), the diagnostic unit 31 determines in step S220 that the BC pressure is normal. If, in step S203, the diagnostic unit 31 determines that the BC pressure has not risen to the fourth reference pressure P4 or higher (Nо), it again determines whether the BC pressure has risen to the fourth reference pressure P4 or higher. Although it is determined, if the BC pressure supply time becomes equal to or longer than the eighth reference time T8 for determining the brake shortage, the process of step S203 may be stopped to determine that the brake is insufficient. good. Further, in step S214, when the diagnostic unit 31 determines that the BC pressure has not risen to the fifth reference pressure P5 or higher (Nо), it again determines whether the BC pressure has risen to the fifth reference pressure P5 or higher. Although it is determined, if the BC pressure supply time exceeds the 10th reference time T10, the process of step S214 is stopped, and there is a possibility that the brake is insufficient or the compressed air is leaking to the atmosphere side. It may be judged.

According to the monitoring system 2 according to the first embodiment of the present disclosure, BC indicating the pressure of the brake cylinder 24 of the brake device 18 that generates the mechanical braking force by pressing the wheel control element 25 against the wheels 19 provided on the vehicle 2. When the BC pressure sensor 17 detects the pressure and the vehicle 2 is stopped and the brake command is not input, the BC pressure detected by the BC pressure sensor 17 after the brake command is input brakes. The air supply time measuring unit 32 that measures the BC pressure air supply time required to rise to the fourth reference pressure P4, which is set lower than the target BC pressure for the command, and the BC pressure air supply measured by the air supply time measuring unit 32. When the time is equal to or longer than the predetermined sixth reference time T6, the diagnostic unit 31 for determining that there is an air supply abnormality or a sign of an air supply abnormality is provided, so that the air supply in the stage before the brake shortage is provided. It is possible to detect a sign of abnormality or abnormal air supply.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the diagnosis unit 31 supplies air when the BC pressure air supply time is longer than the sixth reference time T6 and is equal to or longer than the seventh reference time T7. If it is determined that there is an abnormality and the BC pressure air supply time is greater than or equal to the 6th reference time T6 and less than the 7th reference time T7, it is determined that there is a sign of an abnormal air supply, so before the brake becomes insufficient. It is possible to detect in more detail whether it is a staged air supply abnormality or a sign of an air supply abnormality.

According to the monitoring system 2 according to the first embodiment of the present disclosure, when the BC pressure supply time is longer than the seventh reference time T7 and is equal to or longer than the eighth reference time T8, the diagnostic unit 31 lacks the brake. Therefore, even if a brake shortage occurs, it can be appropriately detected.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the air supply time measuring unit 32 receives the BC pressure air supply after the brake command is input at the time of the delivery inspection in the state where the vehicle 2 is stopped. Since the time is measured, the BC pressure supply time can be measured without being affected by the regenerative brake, so that it is related to the brake control valve 13 or the relay valve 14 which is the air control unit of the brake control device 3. It is possible to grasp that an abnormal air supply or a sign of an abnormal air supply is occurring.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the AC pressure sensor 16 for detecting the AC pressure indicating the pressure of the compressed air supplied from the brake control valve 13 to the relay valve 14 as the brake command pressure is provided. In the air supply time measuring unit 32, the AC pressure detected by the AC pressure sensor 16 after the brake command is input is the fourth reference in the state where the vehicle 2 is stopped and the brake command is not input. The AC pressure air supply time required to rise to the pressure P4 is measured, and when the BC pressure air supply time is the sixth reference time T6 or more, the diagnostic unit 31 measures the AC pressure air supply time to be the sixth reference time or more T6. If the AC pressure air supply time is not equal to or longer than the sixth reference time T6, it is determined that there is an air supply abnormality or a sign of an air supply abnormality related to the relay valve 14, so the brake is insufficient. It is possible to detect an air supply abnormality or a sign of an air supply abnormality related to the relay valve 14 in the previous stage.

According to the monitoring system 2 according to the first embodiment of the present disclosure, when the AC pressure air supply time is the sixth reference time T6 or more, the diagnosis unit 31 has an air supply abnormality or supply related to the brake control valve 13. Since it is determined that there is a sign of an air abnormality, it is possible to detect an air supply abnormality or a sign of an air supply abnormality related to the brake control valve 13 in the stage before the brake becomes insufficient.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the air supply time measuring unit 32 has the fifth reference pressure P5 in which the BC pressure measured by the BC pressure sensor 17 is set higher than the fourth reference pressure P4. The BC pressure air supply time required to start up is measured, and when the BC pressure air supply time is longer than the 6th reference time T6 and is equal to or longer than the 9th reference time T9, the air supply abnormality or Since it is determined that there is a sign of an air supply abnormality, it is possible to more accurately detect a sign of an air supply abnormality or an air supply abnormality in the stage before the brake becomes insufficient.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the diagnostic unit 31 uses the BC pressure sensor 17 when the tenth reference time T10, which is set longer than the eighth reference time T8 and the ninth reference time T9, elapses. If the measured BC pressure is equal to or less than the 6th reference pressure P6, which is set higher than the 5th reference pressure P5, there is a possibility that compressed air is leaking to the atmosphere side from the piping of the relay valve 14 or the brake cylinder 24. Therefore, even if there is an insufficient BC pressure, it can be appropriately detected.

According to the monitoring system 2 according to the first embodiment of the present disclosure, since the data storage unit 30 for accumulating the BC pressure air supply time measured by the air supply time measurement unit 32 is provided, a plurality of past BC pressure air supply units are provided. The time can be used to determine the air supply abnormality or the sign of the air supply abnormality.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the position information acquisition unit 28 for acquiring the position information of the vehicle 2 is provided, and the data storage unit 30 is the BC pressure air supply time and the air supply time measurement unit. When the BC pressure supply time is measured by 32, the position information of the vehicle 2 acquired by the position information acquisition unit 28 is linked and accumulated, so that the BC pressure supply time when the vehicle 2 is stopped is used. You can figure out if there is one.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the temperature sensor 23 for detecting the temperature information around the brake device 18 is provided, and the data storage unit 30 measures the supply time at the BC pressure supply time. Since the temperature information detected by the temperature sensor 23 when the BC pressure air supply time is measured by the unit 32 is linked and accumulated, it is the BC pressure air supply time when the temperature around the brake device 18 is. Can be grasped.

In the monitoring system 1 according to the second embodiment, as shown in FIG. 1, an example in which the data storage unit 30 and the diagnosis unit 31 are provided on the ground device 8 is shown, but the data storage unit 30 and the diagnosis unit are shown. The 31 is not limited to being provided in the ground device 8, and may be configured to be provided in, for example, a brake control device 3 or a central device 5 provided in the vehicle 2.

Further, in the monitoring system 1 according to the first embodiment, as shown in FIGS. 10 to 12, the diagnosis unit 31 is in a state where the vehicle 2 is stopped and the brake command is input by the determination unit 26. When it is determined that the brake command has been input in the non-existing state, the supply air abnormality or the sign of the air supply abnormality is determined using one BC pressure air supply time measured by the air supply time measurement unit 32. An example is shown. However, the diagnosis unit 31 acquires a plurality of BC pressure air supply times measured by the air supply time measurement unit 32 within a predetermined second period, and the BC pressure air supply time within the second period. By obtaining the tendency of, the air supply abnormality or the sign of the air supply abnormality may be determined. The second period is, for example, a period of one week or one month, but is not particularly limited, and may be a period of one day or one year.

FIG. 15 is a diagram showing an example of a change over time in the brake cylinder pressure supply time. FIG. 15 shows the BC pressure supply time required from the input of the date on the horizontal axis and the brake command on the vertical axis to the rise of the BC pressure detected by the BC pressure sensor 17 to the fourth reference pressure P4. The BC pressure air supply time is, for example, the BC pressure air supply time measured by the air supply time measuring unit 32 at each delivery inspection of the vehicle 2. FIG. 15 shows the BC pressure supply time for 10 days as an example. In FIG. 15, the date on the horizontal axis is expressed as the 1st to 10th days, but the date may be expressed as the date. The diagnostic unit 31 does not necessarily have to acquire the BC pressure air supply time for each day, and the BC pressure air supply for each predetermined period (for example, every week) set shorter than the second period. You may try to get the time. Further, the diagnosis unit 31 may acquire statistical values such as an average value of a plurality of BC pressure air supply times measured by the air supply time measurement unit 32 in a predetermined period. The plurality of BC pressure air supply times measured by the air supply time measuring unit 27 are, for example, vehicle identification information of the vehicle 2, device identification information of the brake device 18, device identification information of the brake control device 3, train position information, and the like. It is associated with information such as environmental information, temperature information, date and time information, brake command information, and door opening / closing information, and is stored in the data storage unit 30 included in the ground device 8. For example, as shown in FIG. 15, the diagnosis unit 31 may obtain a tendency over time by estimating a tendency or the like using the BC pressure air supply time within the second period. In addition, the diagnosis unit 31 combines information such as environmental information and temperature information stored in the data storage unit 30 together with a plurality of BC pressure supply times to perform machine learning, thereby causing an exhaust abnormality or an exhaust abnormality. It may be possible to make a diagnosis of signs of.

Further, the diagnosis unit 31 is, for example, a predetermined number of times within the supply air abnormality sign region where the BC pressure air supply time is equal to or more than the sixth reference time T6 and less than the seventh reference time T7 within the second period. If it is contained in the above amount or in a predetermined ratio or more, it may be determined that there is a sign of an air supply abnormality related to BC pressure.

Each device included in the monitoring system 1 according to the first and second embodiments of the present invention includes, for example, a processor and a memory, and the operation of each device can be realized by software. FIG. 16 is a diagram showing an example of a hardware configuration that realizes each device included in the monitoring system 1 according to the first and second embodiments of the present invention. As shown in FIG. 16, each device included in the monitoring system 1 according to the first and second embodiments of the present invention includes a processor 101 and a memory 102, and the processor 101 and the memory 102 are connected by a system bus. There is. The processor 101 performs calculation and control by software using the input data, and the memory 102 stores the input data or data and programs necessary for the processor 101 to perform calculation and control. A plurality of processors 101 and a plurality of memories 102 may be provided.

Further, the present disclosure is not limited to the above-described embodiment, and each embodiment can be appropriately changed or omitted without departing from the scope of the idea of the present disclosure.

1 Monitoring system, 2 Vehicles, 3 Brake control device, 16 AC pressure sensor, 17 Brake cylinder pressure detector, 18 Brake equipment, 19 Rotating body (wheel), 23 Temperature detector, 24 Brake cylinder 25 Friction material (brake shoes) , 26 Judgment unit, 27 Exhaust time measurement unit, 28 Position information acquisition unit, 29 Environmental information acquisition unit, 30 Data storage unit, 31 Diagnosis unit, 32 Air supply time measurement unit

Claims

A brake cylinder pressure detector that detects the brake cylinder pressure, which indicates the pressure of the brake cylinder possessed by the brake equipment that generates mechanical braking force by pressing a friction material against a rotating body provided in the vehicle.
When the vehicle is stopped and a brake command is input, the brake cylinder pressure detected by the brake cylinder pressure detection unit after the brake command is released is a predetermined first reference. The exhaust time measuring unit that measures the brake cylinder pressure exhaust time required to reduce the pressure,
When the brake cylinder pressure exhaust time measured by the exhaust time measuring unit is equal to or longer than a predetermined first reference time, a diagnostic unit that determines that there is an exhaust abnormality or a sign of an exhaust abnormality, and
A monitoring system characterized by being equipped with.
When the brake cylinder pressure / exhaust time is equal to or longer than the second reference time set longer than the first reference time, the diagnostic unit determines that there is an exhaust abnormality.
The monitoring system according to claim 1, wherein when the brake cylinder pressure / exhaust time is equal to or longer than the first reference time and less than the second reference time, it is determined that there is a sign of the exhaust abnormality. ..
The second aspect of claim 2, wherein the diagnostic unit determines that the brake is inflexible when the brake cylinder pressure / exhaust time is equal to or longer than the third reference time set longer than the second reference time. Monitoring system.
The claim is characterized in that the exhaust time measuring unit measures the brake cylinder pressure exhaust time after the brake command is released at the time of stopping at a station or checking the delivery of the vehicle while the vehicle is stopped. The monitoring system according to any one of claims 1 to 3.
The diagnostic unit acquires a plurality of the brake cylinder pressure / exhaust times measured by the exhaust time measuring unit within a predetermined first period, and the brake cylinder pressure / exhaust time within the first period. The monitoring system according to any one of claims 1 to 4, wherein the tendency of the above is obtained.
The diagnostic unit has a predetermined number of times or more within the exhaust abnormality sign region where the brake cylinder pressure exhaust time is equal to or longer than the first reference time and less than the second reference time within the first period. The monitoring system according to claim 5, wherein if it is contained in a predetermined ratio or more, it is determined that there is a sign of the exhaust abnormality.
It is equipped with an AC pressure detector that detects the AC pressure that indicates the pressure of the compressed air supplied from the brake control valve to the relay valve as the brake command pressure.
In the state where the brake command is input, the exhaust time measuring unit requires an AC pressure from when the brake command is released until the AC pressure detected by the AC pressure detecting unit drops to the first reference pressure. Measure the exhaust time and
When the brake cylinder pressure exhaust time is equal to or longer than the first reference time, the diagnostic unit determines whether or not the AC pressure exhaust time is equal to or longer than the first reference time.
Any of claims 1 to 6, wherein when the AC pressure exhaust time is not equal to or longer than the first reference time, it is determined that there is an exhaust abnormality related to the relay valve or a sign of the exhaust abnormality. The monitoring system described in item 1.
The diagnostic unit is characterized in that when the AC pressure exhaust time is equal to or longer than the first reference time, it determines that there is a sign of the exhaust abnormality or the exhaust abnormality related to the brake control valve. The monitoring system according to 7.
The exhaust time measuring unit measures the brake cylinder pressure exhaust time required for the brake cylinder pressure measured by the brake cylinder pressure detecting unit to drop to a second reference pressure set lower than the first reference pressure. ,
When the brake cylinder pressure / exhaust time is longer than the first reference time and is equal to or longer than the fourth reference time, the diagnostic unit determines that there is a sign of the exhaust abnormality or the exhaust abnormality. The monitoring system according to any one of claims 1 to 8.
In the diagnostic unit, the brake cylinder pressure measured by the brake cylinder pressure detecting unit is lower than the second reference pressure when the third reference time and the fifth reference time set longer than the fourth reference time have elapsed. The monitoring system according to claim 9, wherein when the pressure is equal to or higher than the set third reference pressure, it is determined that the SR pressure may leak into the relay valve.
A brake cylinder pressure detector that detects the brake cylinder pressure, which indicates the pressure of the brake cylinder possessed by the brake equipment that generates mechanical braking force by pressing a friction material against a rotating body provided in the vehicle.
When the vehicle is stopped and no brake command is input, the brake cylinder pressure detected by the brake cylinder pressure detection unit after the brake command is input is the target brake for the brake command. The brake cylinder pressure air supply time measuring unit that measures the brake cylinder pressure air supply time required to rise to the fourth reference pressure set lower than the cylinder pressure, and the air supply time measuring unit.
When the brake cylinder pressure air supply time measured by the air supply time measuring unit is equal to or longer than a predetermined sixth reference time, a diagnostic unit that determines that there is an air supply abnormality or a sign of an air supply abnormality, and
A monitoring system characterized by being equipped with.
When the brake cylinder pressure air supply time is longer than the sixth reference time and is equal to or longer than the seventh reference time, the diagnostic unit determines that there is an air supply abnormality.
The eleventh aspect of claim 11, wherein when the brake cylinder pressure air supply time is equal to or longer than the sixth reference time and less than the seventh reference time, it is determined that there is a sign of the air supply abnormality. Monitoring system.
The diagnosing unit according to claim 12, wherein when the brake cylinder pressure supply time is equal to or longer than the eighth reference time set longer than the seventh reference time, the diagnostic unit determines that the brake is insufficient. Monitoring system.
From claim 11, the air supply time measuring unit measures the brake cylinder pressure air supply time after the brake command is input at the time of delivery inspection in a state where the vehicle is stopped. The monitoring system according to any one of claims 13.
The diagnostic unit acquires a plurality of the brake cylinder pressure air supply time measured by the air supply time measuring unit within a predetermined second period, and the brake cylinder pressure within the second period. The monitoring system according to any one of claims 1 to 14, wherein the tendency of the air supply time is obtained.
The diagnostic unit has a predetermined number of times or more in the air supply abnormality sign region where the brake cylinder pressure air supply time is equal to or longer than the sixth reference time and less than the seventh reference time within the second period. Or, the monitoring system according to claim 15, wherein if it is contained in a predetermined ratio or more, it is determined that there is a sign of the air supply abnormality.
It is equipped with an AC pressure detector that detects the AC pressure that indicates the pressure of the compressed air supplied from the brake control valve to the relay valve as the brake command pressure.
In the air supply time measuring unit, when the vehicle is stopped and the brake command is not input, the AC pressure detected by the AC pressure detecting unit after the brake command is input is measured. The AC pressure air supply time required to rise to the fourth reference pressure was measured, and
When the brake cylinder pressure supply time is equal to or longer than the sixth reference time, the diagnostic unit determines whether or not the AC pressure supply time is equal to or longer than the sixth reference time.
Claim 11 to claim 11, wherein when the AC pressure air supply time is not equal to or longer than the sixth reference time, it is determined that there is a sign of the air supply abnormality or the air supply abnormality related to the relay valve. 16. The monitoring system according to any one of 16.
When the AC pressure air supply time is equal to or longer than the sixth reference time, the diagnostic unit determines that there is a sign of the air supply abnormality or the air supply abnormality related to the brake control valve. The monitoring system according to claim 17.
The air supply time measuring unit measures the brake cylinder pressure air supply time required for the brake cylinder pressure measured by the brake cylinder pressure detecting unit to rise to a fifth reference pressure set higher than the fourth reference pressure. Measure and
When the brake cylinder pressure air supply time is equal to or longer than the ninth reference time set longer than the sixth reference time, the diagnostic unit determines that there is a sign of the air supply abnormality or the air supply abnormality. The monitoring system according to any one of claims 11 to 18.
In the diagnostic unit, the brake cylinder pressure measured by the brake cylinder pressure detecting unit is higher than the fifth reference pressure when the eighth reference time and the tenth reference time set longer than the ninth reference time have elapsed. 19. The method according to claim 19, wherein when the pressure is equal to or lower than the set sixth reference pressure, it is determined that compressed air may be leaking to the atmosphere side from the relay valve or the piping of the brake cylinder. Monitoring system.
The claim is characterized by comprising a data accumulating unit for accumulating the brake cylinder pressure exhaust time measured by the exhaust time measuring unit or the brake cylinder pressure air supply time measured by the air supply time measuring unit. The monitoring system according to any one of claims 1 to 20.
It is provided with a position information acquisition unit that acquires the position information of the vehicle.
The data storage unit measures the brake cylinder pressure / exhaust time by the exhaust time measuring unit at the brake cylinder pressure / exhaust time or the brake cylinder pressure / air supply time, or the brake by the air supply time measuring unit. The monitoring system according to claim 21, wherein when the cylinder pressure supply time is measured, the position information of the vehicle acquired by the position information acquisition unit is associated and accumulated.
A temperature detection unit for detecting temperature information around the brake device is provided.
The data storage unit measures the brake cylinder pressure / exhaust time by the exhaust time measuring unit at the brake cylinder pressure / exhaust time or the brake cylinder pressure / air supply time, or the brake by the air supply time measuring unit. The monitoring system according to claim 21, wherein the temperature information detected by the temperature detection unit when the cylinder pressure air supply time is measured is associated and accumulated.