JP7330364B2 - Monitoring system - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a monitoring system for monitoring the state of brake equipment for railway vehicles.

In a conventional brake device, for example, the BC pressure is measured after a predetermined period of time has passed since the start of the brake loosening operation, and the case where the measured BC pressure (brake cylinder pressure) is equal to or higher than a predetermined value is detected as a state of brake failure. (See, for example, paragraph [0005] of Patent Document 1).

JP-A-08-290766

However, in the case where brake failure is detected based on whether or not the BC pressure is equal to or higher than a predetermined value as in the conventional art, there is a problem that it is not possible to detect an abnormality or a sign of an abnormality in the stage prior to brake failure. There is

The present disclosure has been made to solve the above-described problems, and aims to provide a monitoring system capable of detecting an exhaust abnormality or a sign of an exhaust abnormality in a stage before brake failure occurs. and A further object of the present disclosure is to provide a monitoring system capable of detecting an air supply abnormality in the preliminary stage of insufficient braking or a sign of an air supply abnormality.

To achieve the above object, a monitoring system according to the present disclosure detects a brake cylinder pressure that indicates the pressure of a brake cylinder of a brake device that generates mechanical braking force by pressing a friction material against a rotating body provided in a vehicle. and a brake cylinder pressure detected by the brake cylinder pressure detection unit after the brake command is released in a state where the vehicle is stopped and a brake command is input is predetermined. Exhaust time measuring unit for measuring the brake cylinder pressure exhaust time required for the pressure to drop to the first reference pressure, and when the brake cylinder pressure exhaust time measured by the exhaust time measuring unit is equal to or longer than the predetermined first reference time includes 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 includes a brake cylinder pressure detection unit that detects a brake cylinder pressure that indicates the pressure of a brake cylinder 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 no brake command is 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. an air supply time measuring section for measuring the brake cylinder pressure air supply time required until the fourth reference pressure, which is set to be low, rises; a diagnostic unit that determines that there is an air supply abnormality or a sign of an air supply abnormality when the time is six or more reference times.

According to the monitoring system according to the present disclosure, the brake cylinder pressure detection unit detects the brake cylinder pressure indicating the pressure of the brake cylinder of the brake device that generates the mechanical braking force by pressing the friction material against the rotating body provided in the vehicle. Then, in a state in which the vehicle is stopped and a brake command is input, the brake cylinder pressure detected by the brake cylinder pressure detecting section after the brake command is released reaches the predetermined first reference pressure. When the brake cylinder pressure exhaust time measured by the exhaust time measurement unit that measures the brake cylinder pressure exhaust time required for the pressure to decrease and the exhaust time measurement unit is equal to or longer than a predetermined first reference time, exhaust abnormality or exhaust and a diagnostic unit that determines that there is a sign of abnormality, so that it is possible to detect an exhaust abnormality or a sign of exhaust abnormality in a stage before the brakes become inoperable.

According to the monitoring system according to the present disclosure, the brake cylinder pressure detection unit detects the brake cylinder pressure indicating the pressure of the brake cylinder of the brake device that generates the mechanical braking force by pressing the friction material against the 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 detector after the brake command is input is higher than the target brake cylinder pressure for the brake command. an air supply time measuring section for measuring the brake cylinder pressure air supply time required until the fourth reference pressure, which is set to be low, rises; and a diagnostic unit that determines that there is an air supply abnormality or a sign of an air supply abnormality when the time is 6 or more reference times, so that the air supply abnormality or the sign of an air supply abnormality in the previous stage of brake shortage is detected. can do.

1 is a block diagram showing an example of a configuration of a monitoring system according to Embodiment 1 of the present disclosure; FIG. 1 is a block diagram showing an example of a configuration of a brake control device according to Embodiment 1 of the present disclosure; FIG. FIG. 4 is a diagram showing an example of measurement of brake cylinder pressure exhaust time by the monitoring system according to Embodiment 1 of the present disclosure; FIG. 7 is a diagram showing another example of measurement of brake cylinder pressure exhaust time by the monitoring system according to Embodiment 1 of the present disclosure; FIG. 4 is a diagram showing an example of measurement of brake cylinder pressure exhaust time and AC pressure exhaust time by the monitoring system according to Embodiment 1 of the present disclosure; FIG. 4 is a flowchart showing an example of a flow of a sign of exhaust abnormality and determination of exhaust abnormality using brake cylinder pressure exhaust time by the monitoring system according to the first embodiment of the present disclosure; FIG. FIG. 4 is a flowchart showing an example of a flow of a sign of exhaust abnormality and determination of exhaust abnormality using brake cylinder pressure exhaust time by the monitoring system according to the first embodiment of the present disclosure; FIG. FIG. 5 is a diagram showing an example of temporal changes in brake cylinder pressure exhaust time; FIG. 4 is a block diagram showing an example of a configuration of a brake control device according to Embodiment 2 of the present disclosure; FIG. FIG. 9 is a diagram showing an example of measurement of brake cylinder pressure air supply time by a monitoring system according to Embodiment 2 of the present disclosure; FIG. 9 is a diagram showing another example of measurement of brake cylinder pressure air supply time by the monitoring system according to Embodiment 2 of the present disclosure; FIG. 9 is a diagram showing an example of measurement of a brake cylinder pressure air supply time and an AC pressure air supply time by a monitoring system according to Embodiment 2 of the present disclosure; FIG. 11 is a flow chart showing an example flow of a sign of an air supply abnormality and determination of an air supply abnormality using a brake cylinder pressure air supply time by a monitoring system according to Embodiment 2 of the present disclosure; FIG. FIG. 11 is a flow chart showing an example flow of a sign of an air supply abnormality and determination of an air supply abnormality using a brake cylinder pressure air supply time by a monitoring system according to Embodiment 2 of the present disclosure; FIG. FIG. 5 is a diagram showing an example of temporal changes in brake cylinder pressure air supply time; 1 is a diagram illustrating an example of a hardware configuration that implements each device included in a monitoring system according to Embodiments 1 and 2 of the present disclosure; FIG.

Hereinafter, embodiments of a 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 configuration of a monitoring system according to the first embodiment. As shown in FIG. 1, a monitoring system 1 according to the first embodiment includes, for example, a brake control device 3 for controlling brake equipment mounted on a vehicle 2 constituting a train, a brake control device 3, and the like. A terminal device 4 that collects status information indicating the status of a plurality of installed devices, a central device 5 that acquires status information of a plurality of devices output from the terminal device 4, and status information output from the central device 5, etc. An on-board wireless device 7 that transmits to the ground side by wireless communication via a network 6, and a ground device 8 that acquires state information and the like from the vehicle 2 via the on-board wireless device 7 are provided. In addition, 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 the brake operation performed by the driver, a monitor display (not shown), etc. A driver's cab 9 is mounted. Although FIG. 1 shows only two vehicles 2, the leading vehicle 2a and the following vehicle 2b adjacent to the vehicle, the number of vehicles 2 constituting the train is not particularly limited.

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

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

The central device 5 is mounted, for example, on the leading vehicle 2a and the trailing 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 radio device 7 .

In the central unit 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 times, etc., train identification information identifying a train, train position information indicating the position of the train, Train speed information indicating the speed of the train, vehicle number information indicating the number of connected vehicles in 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 the train. In addition, the central device 5 manages door opening/closing information indicating opening/closing information of doors provided in each vehicle 2 for getting on and off passengers as status information. The central unit 5 may also manage environmental information indicating temperature, humidity, amount of precipitation, wind speed, etc. around the location of the train. In addition, the central device 5 is connected to the driver's cab 9, and transmits control information input from a control operation device or the like provided in the cab 9 to each device via the terminal device 4 installed in each vehicle 2. Send and take control. A monitor display provided in the driver's cab 9 displays information such as train speed, door opening/closing 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 Embodiment 1 of the present disclosure. The brake control device 3, as shown in FIG. 16, a brake cylinder pressure detector (hereinafter referred to as a "BC pressure sensor") 17, and the like. Further, as shown in FIG. 2, the vehicle 2 includes, in addition to the brake control device 3, 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. The brake control device 3 receives, for example, a brake command output from the main controller of the driver's cab 9, and controls the operation of the brake device 18 based on the brake command. A brake command is input to the brake control device 3 from a master controller operated by an operator or the like. It contains the emergency braking command to be used.

The brake device 18 is a mechanical brake that acts on each wheel 19 and is provided on the axle of each wheel 19 . The brake device 18 has a brake cylinder 24 and a brake shoe 25 that is a friction material that operates according to the air pressure inside the brake cylinder 24 . In the brake device 18 , 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 increases, the brake shoe 25 is released from the vehicle 2 . A mechanical braking force is generated by being pressed against the wheels 19, which are rotating bodies that rotate during running. The mechanical braking force is represented by the product of the pressing force that presses the brake shoe 25 against the wheel 19 and the friction coefficient of the contact surface between the brake shoe 25 and the wheel 19 . Incidentally, 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 an axle or the like, and the mechanical braking force is generated by sandwiching the brake disc with brake pads, which are friction materials, according to the BC pressure. Occur.

Although not shown in detail, the brake control valve 13 includes, for example, a supply valve (AMV: Apply Magnet Valve), which is an electromagnetic valve that supplies compressed air to the relay valve 14, and an electromagnetic valve that discharges the compressed air from the relay valve 14. and an exhaust valve (RMV: Release Magnet Valve). In addition, 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 electromagnetic valve opening/closing signal from the control unit 12, thereby reducing the amount of compressed air supplied to the relay valve 14. Control the flow rate.

The relay valve 14 uses the compressed air in the compressed air tank 21 to supply the brake cylinder 24 with compressed air that is proportional 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 AS pressure indicating the pressure of an air spring 20 provided in the vehicle 2 . AS pressure, which is the pressure of the air spring 20 and is a signal representing 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 controller 12 . The air spring 20 changes the AS pressure output to the AS pressure sensor 15 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.

AC pressure sensor 16 detects AC pressure, which is the pressure of compressed air supplied from brake control valve 13 to relay valve 14 as brake command pressure, and outputs the measured value to 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 a 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 rotational speed of the wheels 19 and outputs the speed signal to the control unit 12 . Although not shown in FIG. 2 , the speed sensors 22 are installed on the front and rear carriages of the vehicle 2 , and the vehicle 2 can detect the speed from each wheel 19 .

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

In the vehicle 2 , the control unit 12 controls the brake device 18 so as to generate a mechanical braking force by pressing the brake shoe 25 against the wheel 19 . The control unit 12 calculates the braking force required for the vehicle 2 based on the braking command and the AS pressure. The necessary braking force is obtained by multiplying the load of the vehicle 2 and the deceleration included in the braking command. The controller 12 then calculates a target pressure value within 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 brake cylinder pressure exhaust time by the monitoring system according to Embodiment 1 of the present disclosure. In FIG. 3, the horizontal axis indicates the brake cylinder pressure exhaust time (hereinafter referred to as "BC pressure exhaust time") indicating the elapsed time from when the brake command was released and the BC pressure began to be exhausted to the brake cylinder 24, and the vertical axis indicates BC. BC pressure detected by the pressure sensor 17 is shown. For example, the determination unit 26 determines whether or not a brake command has been released (for example, a brake release command has been input) while the vehicle 2 is stopped and a brake command has been input. Examples of the state in which the vehicle 2 is stopped include, but are not limited to, the time when the vehicle 2 is stopped at a station, or when the vehicle is inspected. As shown in FIG. 3, when the brake command is released, the BC pressure is exhausted, so the BC pressure begins to drop. For example, when determining 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 cancelled. More specifically, when the exhaust time measurement unit 27 receives the brake command release signal from the determination unit 26, first, the BC pressure detected by the BC pressure sensor 17 decreases to the predetermined first reference pressure P1. Measure the required BC pressure evacuation time. The first reference pressure P1 may be a pressure value set higher than the threshold value of the BC pressure used for conventional brake failure detection, and is set to 50 kPa, for example. 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 third reference pressure P3. 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. Also, the third reference pressure P3 may be set lower than the second reference pressure P2, and is not particularly limited, but is set to 2 to 10 [kPa], for example.

Similarly, the exhaust time measurement unit 27 measures the AC pressure exhaust time after the brake command is cancelled. More specifically, when the exhaust time measurement unit 27 receives the brake command release signal from the determination unit 26, first, the exhaust time measurement unit 27 measures 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 time. The exhaust time measurement 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.

The position information acquisition unit 28 acquires, for example, train position information indicating the position of the train from the central device 5 . Further, the environment information acquisition unit 29 acquires environment information indicating the temperature, humidity, amount of precipitation, wind speed, etc. around the location of the train from the central device 5, for example.

In the control unit 12, for example, the train position information, the environment information, the temperature when the determination unit 26 determines that the brake command has been released during the BC pressure exhaust time and the AC pressure exhaust time measured by the exhaust time measuring unit 27. information, date and time information, brake command information, door open/close information, and other information are linked. In addition, the control unit 12 further associates the vehicle identification information of the vehicle 2 in 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, and It transmits to ground equipment 8 via upper radio equipment 7 .

The ground equipment 8 includes a data storage unit 30 and a diagnosis unit 31, as shown in FIG. The data accumulation unit 30 accumulates the BC pressure exhaust time and the AC pressure exhaust time transmitted from the vehicle 2 . The data accumulation unit 30 similarly accumulates 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 exhaust time or the like to determine an exhaust abnormality or a sign of an exhaust abnormality related to the BC pressure exhaust operation. The diagnosis unit 31 acquires the BC pressure exhaust time and the AC pressure exhaust time from the data storage unit 30, for example.

In FIG. 3, an exhaust time-BC pressure curve BR1 showing the relationship between the normal BC pressure exhaust time and the BC pressure is indicated by a solid line. Also, an exhaust time-BC pressure curve BR2 showing the relationship between the BC pressure exhaust time and the BC pressure at the time of an exhaust abnormality sign, an 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 , an 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 indicated by a dashed line.

A first reference time T1 shown in FIG. 3 is a reference time used by the diagnosis unit 31 to determine a sign of exhaust abnormality. The first reference time T1 is set to be shorter than the threshold value of the BC pressure exhaust time used for detecting brake failure, and is set to 1 to 3 [sec], for example. Further, the second reference time T2 is a reference time used for the diagnosis unit 31 to determine whether the exhaust gas is abnormal, 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 use in the determination of brake failure by the diagnosis unit 31, and is set longer than the second reference time T2. Further, the fourth reference time T4 is a reference time used by the diagnosis unit 31 to determine an exhaust abnormality or a sign of an exhaust abnormality, and is set longer than the first reference time T1. Although FIG. 3 shows an example in which the fourth reference time T4 is set to be the same time as the third reference time T3 (T3=T4), it 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. Also, the fourth reference time T4 may be set shorter than the second reference time T2 or longer than the third reference time T3. The fifth reference time T5 is a reference time used by the diagnosis unit 31 to determine 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 a recording unit (not shown) provided in the ground equipment 8, for example. The first to fifth reference times T1 to T5 may be set for each brake control device 3. Further, the diagnosis unit 31 may acquire the first to fifth reference times T1 to T5 from onboard equipment such as the brake control device 3 provided in the vehicle 2 via the onboard radio device 7 .

In FIG. 3, the normal region is defined as a region within the first reference time T1 after the brake command is released. Further, a region that is longer than or equal to the first reference time T1 and shorter than the second reference time T2 is defined as an exhaust abnormality portent region. Further, a region that is longer than or equal to the second reference time T2 and shorter than the third reference time T3 is defined as an abnormal exhaust region. Further, the region of the second reference time T2 or more is defined as the brake non-release region.

As shown in the exhaust time-BC pressure curve BR1 in FIG. 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, the diagnosis unit 31 determines, for example, the BC pressure exhaust time required for the BC pressure to drop to the first reference pressure P1 after the brake command is released, as shown in the exhaust time-BC pressure curve BR2 in FIG. If it is equal to or greater than one reference time T1 and less than the second reference time T2, that is, if it is within the exhaust abnormality portent region, it is determined that there is a portent of exhaust abnormality. Then, for example, when the diagnostic unit 31 determines that there is a sign of an exhaust abnormality, it generates and outputs a caution signal for calling attention. For example, the ground device 8 transmits the warning signal output from the diagnostic unit 31 to the vehicle 2 via the network 6 , thereby displaying information calling attention to the monitor display of the cab 9 of the vehicle 2 .

Further, the diagnosis unit 31 determines, for example, the BC pressure exhaust time required for the BC pressure to drop to the first reference pressure P1 after the brake command is released, as shown in the exhaust time-BC pressure curve BR3 in FIG. If it is longer than or equal to the second reference time T2 and shorter than the third reference time T3, that is, if it is within the abnormal exhaust region, it is determined that there is an abnormal exhaust. Then, for example, when it is determined that there is an exhaust abnormality, the diagnosis section 31 generates and outputs an abnormality signal for notifying of the abnormality. For example, the ground device 8 transmits the abnormality signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, thereby displaying information for notifying the abnormality on the monitor display of the driver's cab 9 of the vehicle 2. .

Further, the diagnosis unit 31 determines, for example, the BC pressure exhaust time required for the BC pressure to drop to the first reference pressure P1 after the brake command is released, as shown in the exhaust time-BC pressure curve BR4 in FIG. If it is longer than or equal to 3 reference times T3, that is, if it is within the brake non-release region, it is determined that the brake is non-release. Then, for example, when it is determined that the brake is not released, the diagnosis unit 31 generates a brake not released signal for notifying that the brake is not released and a stop command for stopping the vehicle 2, Output. For example, the ground equipment 8 transmits the brake non-release signal and the vehicle stop command output from the diagnostic unit 31 to the vehicle 2 via the network 6, thereby displaying the brake non-release signal on the monitor display of the driver's 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 brake cylinder pressure exhaust time by the monitoring system according to Embodiment 1 of the present disclosure. As described above, the diagnosis unit 31 determines the BC pressure exhaust time required for the BC pressure to drop to the first reference pressure P1 after the brake command is released as shown in the exhaust time-BC pressure curve BR1 in FIG. If it is less than one 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 will not be properly exhausted for some reason. 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 detects an exhaust abnormality or an exhaust abnormality. An exhaust time-BC pressure curve BR5 and an 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 is indicated by dashed lines.

As shown in the exhaust time-BC pressure curve BR5 in FIG. If the time is less than T1, that is, if it is within the normal region, the BC pressure exhaust time required for the BC pressure to drop to the second reference pressure P2 after the brake command is released is equal to or longer than the fourth reference time T4. or not. When the diagnostic unit 31 determines that the BC pressure exhaust time required for the BC pressure to decrease to the second reference pressure P2 after the brake command is released is equal to or longer than the fourth reference time T4, the diagnosis unit 31 detects an exhaust abnormality or an exhaust abnormality. It is determined that there is a sign of Then, for example, when the diagnostic unit 31 determines that there is an exhaust abnormality or a sign of an exhaust abnormality, it generates and outputs an abnormality signal for notifying the exhaust abnormality or a warning signal for calling attention. The ground device 8 transmits, for example, the abnormality signal or the caution signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, thereby notifying the monitor display of the cab 9 of the vehicle 2 of the abnormality. Or display information to call attention. It should be noted that the diagnosis unit 31 determines whether to determine an exhaust abnormality or a sign of an exhaust abnormality in a case as shown in the exhaust time-BC pressure curve BR5 in FIG. 4 It may be determined according to the value of the reference time T4.

As shown in the exhaust time-BC pressure curve BR6 in FIG. If it is less than time T1, that is, it is within the normal region, and the BC pressure exhaust time required for the BC pressure to drop to the second reference pressure P2 after the brake command is released is less than the fourth reference time T4 If so, 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 diagnosis unit 31 determines that the BC pressure detected by the BC pressure sensor 17 is equal to or higher than the third reference pressure P3 when the fifth reference time T5 has elapsed, that is, when it determines that there is residual BC pressure, , there is a possibility that SR pressure (compressed air pressure) is leaking into the relay valve 14 . Then, the diagnosis unit 31 generates and outputs, for example, a leakage notification signal for notifying that there is a possibility of SR pressure leakage. For example, the ground device 8 transmits a leakage notification signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, thereby displaying the SR pressure leakage on the monitor display of the driver's cab 9 of the vehicle 2. Display information that notifies you of the possibility.

FIG. 5 is a diagram showing an example of measurement of brake cylinder pressure exhaust time and AC pressure exhaust time by the monitoring system according to Embodiment 1 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. The AC pressure exhaust time is used to make a determination for identifying the location that is the cause of the exhaust abnormality. In the lower diagram of FIG. 5, the horizontal axis indicates the AC pressure exhaust time, which indicates the elapsed time from when the brake command was released and the AC pressure, which is the brake command pressure supplied to the relay valve 14, began to be exhausted, and the vertical axis indicates the AC pressure sensor. 16 shows the AC pressure sensed by. Further, in FIG. 5, a solid line indicates an exhaust time-AC pressure curve AR1 showing the relationship between the normal AC pressure exhaust time and the AC pressure. Also, an exhaust time-AC pressure curve AR2 showing the relationship between the AC pressure exhaust time and the AC pressure at the time of an exhaust abnormality sign, and an 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 indicated by dashed lines.

For example, as shown in the exhaust time-BC pressure curve BR2 or the exhaust time-BC pressure curve BR3 in FIG. 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 in FIG. If it is less than the reference time T1 (not equal to or longer than the first reference time T1), that is, if it is within the normal region, it is determined that the exhaust on the brake control valve 13 side is performed correctly, and the relay valve 14 side It is determined that there is a related exhaust anomaly or a sign of an exhaust anomaly.

For example, the diagnosis unit 31 detects that the AC pressure drops to the first reference pressure P1 after the brake command is released, as shown in the exhaust time-AC pressure curve AR2 and the exhaust time-AC pressure curve AR3 in FIG. If the AC pressure exhaust time required until is equal to or longer than the first reference time T1, that is, if it is in the exhaust abnormality sign region or the exhaust abnormality sign region, there is an exhaust abnormality or a sign of exhaust abnormality related to the brake control valve 13 side. I judge.

6 and 7 are flowcharts showing an example of a flow of an exhaust abnormality prediction and an exhaust abnormality determination 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 flow of processing by the monitoring system 1 according to Embodiment 1 of the present disclosure will be described using flowcharts of FIGS. 6 and 7. FIG. 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.

In step S101, when the determination unit 26 determines that the brake command has been released (Yes), in step S102, the exhaust time measurement unit 27 measures the BC pressure exhaust time and the AC pressure after the brake command is released. Measure the evacuation time. In step S101, when determining unit 26 determines that the brake command has not been released (No), it determines again whether the brake command has been released. That is, the determination unit 26 repeats the determination of S101 until the brake command is cancelled.

Next, in step S103, the determination unit 26 determines whether or not the BC pressure detected by the BC pressure sensor 17 has decreased to the first reference pressure P1 or lower. In step S103, when the determination unit 26 determines that the BC pressure has decreased 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 canceled is the first pressure. The BC pressure exhaust time required for the AC pressure to drop to the reference pressure P1 and the AC pressure exhaust time required for the AC pressure to drop to the first reference pressure P1 are transmitted to the diagnosis unit 31. 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 (No), it determines again whether 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.

When the diagnosis unit 31 determines in step S104 that the BC pressure exhaust time is equal to or longer than the first reference time T1 (Yes), in step S105 the diagnosis unit 31 determines that the BC pressure exhaust time is equal to or longer than the second reference time T2. It is determined whether or not the above is satisfied. When the diagnosis 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 diagnosis unit 31 determines that the BC pressure exhaust time is equal to or greater than the third reference time T3. It is determined whether or not the above is satisfied.

In step S106, when the diagnosis 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 diagnosis unit 31 determines that the brake is not relieved, Generate and output a brake non-release signal for notifying that the brake is non-release.

Further, when the diagnostic unit 31 determines in step S106 that the BC pressure exhaust time is not equal to or longer than the third reference time T3 (No), in step S108, the diagnostic unit 31 detects the AC pressure after the brake command is released. is equal to or longer than the first reference time T1. In step S108, when the diagnosis 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 diagnosis unit 31 detects an exhaust abnormality related to the brake control valve 13 side. For example, it generates and outputs an abnormality signal for notifying that there is an exhaust abnormality related to the brake control valve 13 side. When the diagnosis unit 31 determines in step S108 that the AC pressure exhaust time is not longer than the first reference time T1 (No), in step S110, the diagnosis unit 31 determines that there is an exhaust abnormality related to the relay valve 14 side. Then, 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 diagnosis unit 31 determines that the BC pressure exhaust time is not longer than the second reference time T2 (No), in step S111, the diagnosis unit 31 detects the AC pressure after the brake command is released. is equal to or longer than the first reference time T1. In step S111, when the diagnosis 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 diagnosis unit 31 detects an exhaust abnormality related to the brake control valve 13 side. For example, it generates and outputs a warning signal for notifying that there is a sign of exhaust abnormality related to the brake control valve 13 side. If the diagnostic unit 31 determines in step S111 that the AC pressure exhaust time is not equal to or longer than the first reference time T1 (No), in step S113, the diagnostic unit 31 detects a sign of an exhaust abnormality related to the relay valve 14 side. For example, it generates and outputs a caution signal for notifying that there is a sign of an exhaust abnormality related to the relay valve 14 side.

Further, when the diagnostic unit 31 determines in step S104 that the BC pressure exhaust time is not equal to or longer than the first reference time T1 (No), in step S114 shown in FIG. It is determined whether or not the pressure has decreased to the reference pressure P2. FIG. 7 shows the details of the processing A after the diagnosis unit 31 determines that the BC pressure exhaust time is not equal to or longer than the first reference time T1 (No) in the processing of step S104 of FIG. be.

In step S114, when the diagnosis unit 31 determines that the BC pressure has decreased to the second reference pressure P2 (Yes), in step S115, the diagnosis unit 31 determines that the BC pressure has decreased to the second reference pressure 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 a 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 lower (No), it again determines whether the BC pressure has decreased to the second reference pressure P2 or lower. . That is, the determination unit 26 repeats the determination of S114 until the BC pressure drops below the second reference pressure P2.

When 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), in step S116, the diagnostic unit 31 determines that there is a sign of exhaust abnormality. Further, when the diagnostic unit 31 determines in step S115 that the BC pressure exhaust time is not equal to or longer than the fourth reference time T4 (No), in step S117, the diagnostic unit 31 determines that the BC pressure exhaust time is equal to or greater than the fifth reference time T4. It is determined whether or not it is equal to or greater than T5.

In step S117, when the diagnosis unit 31 determines that the BC pressure exhaust time is equal to or longer than the fifth reference time T5 (Yes), in step S118, the diagnosis unit 31 determines that the BC pressure is equal to or higher than the third reference pressure P3. determine whether there is In step S117, when the diagnosis unit 31 determines that the BC pressure exhaust time is not equal to or longer than the fifth reference time T5 (No), the diagnosis unit 31 checks again that the BC pressure exhaust time is equal to or longer than the fifth reference time T5. or not. That is, the determination unit 26 repeats the determination of S117 until the BC pressure exhaust time reaches the fifth reference time T5 or longer.

In step S118, when the diagnosis unit 31 determines that the BC pressure is equal to or higher than the third reference pressure P3 (Yes), in step S119, the diagnosis unit 31 determines whether the SR pressure may leak into the relay valve 14. determined to be viable. When the diagnostic unit 31 determines in step S118 that the BC pressure is not equal to or higher than the third reference pressure P3 (No), the diagnostic unit 31 determines normal in step S120. In step S103, when the diagnosis unit 31 determines that the BC pressure has not decreased to the first reference pressure P1 or less (No), it again checks whether the BC pressure has decreased to the first reference pressure P1 or less. However, if the BC pressure exhaust time is equal to or longer than the third reference time T3 for judging that the brake is not released, the process of step S103 is stopped and it is determined that the brake is not released. Also good. In step S114, when the diagnosis unit 31 determines that the BC pressure has not decreased to the second reference pressure P2 or lower (No), it again checks whether the BC pressure has decreased to the second reference pressure P2 or lower. However, if the BC pressure exhaust time has reached the fifth reference time T5 or longer, the process of step S114 is stopped, and there is a possibility that the brake is not released or the SR pressure is leaking into the relay valve 14. You may make it determine.

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 a mechanical braking force by pressing the brake shoe 25 against the wheel 19 provided in the vehicle 2 A BC pressure sensor 17 for detecting the pressure and a BC pressure detected by the BC pressure sensor 17 after the brake command is released in a state where the vehicle 2 is stopped and a brake command is input is predetermined. and the BC pressure exhaust time measured by the exhaust time measurement unit 27 is equal to or longer than the predetermined first reference time T1. In the case of , the diagnostic unit 31 for determining that there is an exhaust abnormality or a sign of an exhaust abnormality is provided, so that it is possible to detect an exhaust abnormality or a sign of an exhaust abnormality in a stage before the brakes become inactive.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the diagnosis unit 31 determines that the BC pressure exhaust time is equal to or longer than the second reference time T2 set longer than the first reference time T1. If 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 an anomaly or a sign of exhaust anomaly.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the diagnosis unit 31 determines that the BC pressure exhaust time is equal to or longer than the third reference time T3 set longer than the second reference time T2, and the brake is not released. Therefore, it is possible to appropriately detect even when brake failure occurs.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the exhaust time measuring unit 27 measures the BC after the brake command is canceled when the vehicle 2 is stopped at a station or when leaving the garage for inspection. By measuring the pressure exhaust time, the BC pressure exhaust time can be measured without being affected by the regenerative braking. 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 Embodiment 1 of the present disclosure, the AC pressure sensor 16 that detects 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 measurement unit 27 measures the AC pressure exhaust time required from the release of the brake command until the AC pressure detected by the AC pressure sensor 16 drops to the first reference pressure P1 in a state where the brake command is input. When the BC pressure exhaust time is equal to or longer than the first reference time T1, the diagnostic unit 31 determines whether the AC pressure exhaust time is equal to or longer than the first reference time T1. If it is not equal to or longer than the reference time T1, it is determined that there is an exhaust abnormality or a sign of an exhaust abnormality related to the relay valve 14, so an exhaust abnormality or a sign of an exhaust abnormality related to the relay valve 14 before brake failure 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 detects 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 brake failure occurs.

According to the monitoring system 1 according to the first embodiment of the present disclosure, the exhaust time measurement unit 27 adjusts 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 diagnostic unit 31 measures the BC pressure exhaust time required for the BC pressure exhaust time to decrease, and if the BC pressure exhaust time is equal to or longer than the fourth reference time T4 set longer than the first reference time T1, the diagnosis unit 31 detects an exhaust abnormality or a sign of an exhaust abnormality. Since it is determined that there is, it is possible to more accurately detect the exhaust abnormality or the sign of the exhaust abnormality in the stage before the brake is not released.

According to the monitoring system 1 according to Embodiment 1 of the present disclosure, the diagnostic unit 31 causes the BC pressure sensor 16 to When the measured BC pressure is equal to or higher than a third reference pressure P3 set lower than the second reference pressure P2, it is determined that there is a possibility of SR pressure leaking into the relay valve 14. Even when residual pressure exists, it can be appropriately detected.

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

According to the monitoring system 1 according to Embodiment 1 of the present disclosure, the position information acquisition unit 28 that acquires the position information of the vehicle 2 is provided, and the data accumulation unit 30 detects the Since the position information of the vehicle 2 acquired by the position information acquisition unit 28 when measuring the BC pressure exhaust time is linked and accumulated, it is possible to grasp the BC pressure exhaust time 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 that detects the temperature information around the brake device 18 is provided, and the data storage unit 30 detects the exhaust time measurement unit 27 during the BC pressure exhaust time. Since the temperature information detected by the temperature sensor 23 when measuring the BC pressure exhaust time is linked and accumulated, it is possible to grasp the BC pressure exhaust time when the temperature around the brake device 18 was. be able to.

Incidentally, in the monitoring system 1 according to the first embodiment, as shown in FIG. 31 is not limited to being provided in the ground device 8, and may be configured to be provided in the brake control device 3, the central device 5, or the like provided in the vehicle 2, for example.

Further, in the monitoring system 1 according to the first embodiment, as shown in FIGS. In this state, when it is determined that the brake command has been released, 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 diagnostic unit 31 acquires a plurality of BC pressure exhaust times measured by the exhaust time measuring unit 27 within a predetermined first period, and determines the tendency of the BC pressure exhaust time within the first period. It is also possible to determine an exhaust abnormality or a sign of an exhaust abnormality by obtaining it. 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 temporal changes in brake cylinder pressure exhaust time. In FIG. 8, the horizontal axis indicates the date, and the vertical axis indicates the BC pressure exhaust time required for the BC pressure detected by the BC pressure sensor 17 to drop to the first reference pressure P1 after the brake command is released. The BC pressure exhaust time may be, for example, the BC pressure exhaust time measured by the exhaust time measurement unit 27 each time the vehicle 2 leaves the garage for inspection, or the BC pressure exhaust time measured by the exhaust time measurement unit 27 each time the vehicle 2 stops at a station. It may be a statistical value such as an average value of the BC pressure exhaust time for one day. FIG. 8 shows 10 days of BC pressure exhaust time as an example. In FIG. 8, the dates on the horizontal axis are expressed as 1st to 10th days, but may be expressed as year, month, and day. Note that the diagnosis unit 31 does not necessarily need to obtain the BC pressure exhaust time for each day. You may make it acquire. Further, the diagnosis unit 31 may acquire a statistical value such as an average value of a plurality of BC pressure exhaust times measured by the exhaust time measuring unit 27 during a predetermined period. The plurality of BC pressure exhaust times measured by the exhaust time measurement 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, environment information , temperature information, date and time information, brake command information, and door open/close information, etc., and stored in the data storage unit 30 of the ground equipment 8 . For example, as shown in FIG. 8, the diagnosing unit 31 may use the BC pressure exhaust time within the first period to obtain a temporal trend by estimating the trend or the like. In addition, the diagnosis unit 31 performs machine learning by combining environmental information accumulated in the data accumulation unit 30 together with a plurality of BC pressure exhaust times, and information such as temperature information, thereby diagnosing an exhaust abnormality or an exhaust abnormality. A predictive diagnosis may be performed.

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

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

FIG. 10 is a diagram illustrating an example of measurement of brake cylinder pressure air supply time by the monitoring system according to Embodiment 2 of the present disclosure. In FIG. 10, the horizontal axis indicates the brake cylinder pressure supply time (hereinafter referred to as "BC pressure supply time") indicating the elapsed time since the brake command was input and the BC pressure was started to be supplied to the brake cylinder 24, and the vertical axis shows the BC pressure detected by the BC pressure sensor 17 . For example, the determination unit 26 determines whether or not a brake command (brake notch signal) is input when the vehicle 2 is stopped and no brake command is input (brake release). The state in which the vehicle 2 is stopped includes, for example, the time when the vehicle 2 leaves the garage for inspection, but is not limited to this. As shown in FIG. 3, when a brake command is input, the BC pressure is supplied to the brake cylinder 24, so the BC pressure begins to rise. For example, when determining that a brake command has been input, 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 measurement unit 32 measures the BC pressure air supply time after the brake command is input. More specifically, when the air supply time measurement unit 32 receives the brake command input signal from the determination unit 26, first, the BC pressure detected by the BC pressure sensor 17 rises to a predetermined fourth reference pressure P4. Measure the BC pressure air supply time required for The fourth reference pressure P4 is a value that is set lower than the target brake cylinder pressure (hereinafter referred to as "target BC pressure") for the brake command, and is set at, for example, 50 to 70% of the target BC pressure. Note that the target BC pressure can be calculated by the control unit 12 based on the brake command and the AS pressure, for example. In addition, the air supply time measurement 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. . 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. It is set to the value added to P4. Also, 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 the target BC pressure, for example.

Similarly, the air supply time measurement unit 32 measures the AC pressure air supply time after the brake command is input. More specifically, when the air supply time measurement unit 32 receives the brake command input signal from the determination unit 26, first, the AC pressure required for the AC pressure detected by the AC pressure sensor 16 to rise to the fourth reference pressure P4. Measure the air supply time. 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.

Further, in the control unit 12, for example, the train position information when it is determined that the brake command is input by the determination unit 26 during the BC pressure air supply time and the AC pressure air supply time measured by the air supply time measurement unit 32 , environment information, temperature information, date and time information, brake command information, and door open/close information. In addition, the control unit 12 further associates the vehicle identification information of the vehicle 2 in 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, and It transmits to ground equipment 8 via upper radio equipment 7 .

The ground equipment 8 includes a data storage unit 30 and a diagnosis unit 31, as shown in FIG. The data accumulation unit 30 accumulates the BC pressure air supply time and the AC pressure air supply time transmitted from the vehicle 2 . The data accumulation unit 30 similarly accumulates 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 solid line indicates the air supply time-BC pressure curve BA1 showing the relationship between the BC pressure air supply time and the BC pressure in the normal state. In addition, the air supply time showing the relationship between the BC pressure air supply time and the BC pressure at the time of an air supply abnormality sign -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 air supply abnormality- A BC pressure curve BA3 and an air supply time-BC pressure curve BA4 showing the relationship between the BC pressure air supply time and the BC pressure when braking is insufficient are indicated by dashed lines.

A sixth reference time T6 shown in FIG. 10 is a reference time used by the diagnosis unit 31 to determine a sign of air supply abnormality. The sixth reference time T6 is set to be shorter than the threshold value of the BC pressure air supply time used for detecting insufficient braking, and is set to 1 to 3 [sec], for example. Further, the seventh reference time T7 is a reference time used for the determination of air supply abnormality by the diagnosis unit 31, and is set longer than the sixth reference time T6. The seventh reference time T7 is set, for example, 1 to 2 [sec] longer than the sixth reference time T6. The eighth reference time T8 is a reference time used by the diagnosis unit 31 to determine whether the brake is insufficient, and is set longer than the seventh reference time T7. Further, the ninth reference time T9 is a reference time used by the diagnostic unit 31 to determine an air supply abnormality or a sign of an air supply abnormality, and is set longer than the sixth reference time T6. Although FIG. 10 shows an example in which the ninth reference time T9 is set to be the same time as the eighth reference time T8 (T8=T9), 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. Also, the ninth reference time T9 may be set shorter than the seventh reference time T7 or longer than the eighth reference time T8. The tenth reference time T10 is a reference time used by the diagnosis unit 31 to determine 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 a recording unit (not shown) provided in the ground equipment 8, for example. The sixth to tenth reference times T6 to T10 may be set for each brake control device 3. Further, the diagnosis unit 31 may acquire the sixth to tenth reference times T6 to T10 from on-vehicle equipment such as the brake control device 3 provided in the vehicle 2 via the on-board wireless device 7 . Also, 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 section 12. FIG.

In FIG. 10, the normal region is defined as the region within the fourth reference time T4 after the brake command is input. Further, a region that is longer than or equal to the fourth reference time T4 and shorter than the fifth reference time T5 is defined as an air supply abnormality portent region. Further, a region in which the fifth reference time T5 or more and less than the sixth reference time T6 is defined as an air supply abnormality 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. 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, the diagnosis unit 31 determines, for example, the BC pressure air supply time required from the time the brake command is input until the BC pressure rises to the fourth reference pressure P4, as shown in the air supply time-BC pressure curve BA2 in FIG. is greater than or equal to the sixth reference time T6 and less than the seventh reference time T7, that is, if it is within the air supply abnormality portent region, it is determined that there is an air supply abnormality portent. Then, for example, when it is determined that there is a sign of air supply abnormality, the diagnosis unit 31 generates and outputs a warning signal for calling attention. For example, the ground device 8 transmits the warning signal output from the diagnostic unit 31 to the vehicle 2 via the network 6 , thereby displaying information calling attention to the monitor display of the cab 9 of the vehicle 2 .

Further, the diagnosis unit 31 determines, as shown in the air supply time-BC pressure curve BA3 in FIG. If the time is equal to or greater than the seventh reference time T7 and less than the eighth reference time T8, that is, if it 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 of the abnormality. For example, the ground device 8 transmits the abnormality signal output from the diagnosis unit 31 to the vehicle 2 via the network 6, thereby displaying information for notifying the abnormality on the monitor display of the driver's cab 9 of the vehicle 2. .

Further, the diagnosis unit 31 determines, for example, 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, as shown in the air supply time-BC pressure curve BA4 in FIG. is equal to or longer than the eighth reference time T8, that is, if it is within the brake insufficient 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. For example, the ground equipment 8 transmits the brake shortage signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, thereby providing information for notifying the brake shortage to the monitor display of the driver's cab 9 of the vehicle 2. indicate.

FIG. 11 is a diagram illustrating another example of measurement of brake cylinder pressure air supply time by the monitoring system according to Embodiment 2 of the present disclosure. As described above, the diagnostic unit 31 determines 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, as shown in the air supply time-BC pressure curve BA1 in FIG. is less than the sixth reference time T6, i.e., within the normal region, the BC air supply time is determined to be 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 will not be properly supplied for some reason thereafter. 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 determines that the air supply is abnormal or An air supply time-BC pressure curve BA5 and an air supply time-BC pressure curve BA6 showing the relationship between the BC pressure air supply time and the BC pressure when it is determined to be a sign of air supply abnormality are indicated by dashed lines.

As shown in the exhaust time-BC pressure curve BA5 in FIG. When the time is less than the reference time T6, that is, when it is within the normal region, the BC pressure supply time required for the BC pressure to rise to the fifth reference pressure P5 after the brake command is input is the ninth reference time T9 or more. Determine whether or not When the diagnostic unit 31 determines that the BC pressure air supply time required for the BC pressure to rise to the fifth reference pressure P5 after the brake command is input is equal to or longer than the ninth reference time T9, the diagnosis unit 31 detects an air supply abnormality or It is determined that there is a sign of air supply abnormality. Then, for example, when it is determined 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 do. The ground device 8 transmits, for example, the abnormality signal or the caution signal output from the diagnostic unit 31 to the vehicle 2 via the network 6, thereby notifying the monitor display of the cab 9 of the vehicle 2 of the abnormality. Or display information that calls attention. It should be noted that the diagnosis unit 31 determines whether to determine that the air supply is abnormal or that it is a sign of the air supply abnormality in the case shown by the air supply time-BC pressure curve BA5 in FIG. It may be determined according to the values of P5 and the ninth reference time T9.

As shown in the exhaust time-BC pressure curve BA6 in FIG. If it is less than the reference time T6, that is, it is within the normal region, and the BC pressure supply time required for the BC pressure to rise to the fifth reference pressure P5 after the brake command is input is less than the ninth reference time T9 is determined, it is determined whether or not the BC pressure detected by the BC pressure sensor 17 when the tenth reference time T10 has elapsed is equal to or less than the sixth reference pressure P6. When the diagnosis unit 31 determines that the BC pressure detected by the BC pressure sensor 17 is equal to or lower than the sixth reference pressure P6 after the tenth reference time T10 has elapsed, 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 from the piping of the relay valve 14 or the brake cylinder 24 to the atmosphere side. Then, the diagnosis unit 31 generates and outputs, for example, a leakage notification signal for notifying that there is a possibility of compressed air leakage. For example, the ground device 8 transmits a leakage notification signal output from the diagnosis 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 indicates that the compressed air has leaked. Display information that notifies you of the possibility.

FIG. 12 is a diagram showing an example of measurement of the brake cylinder pressure air supply time and the AC pressure air supply time by the monitoring system according to Embodiment 2 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. The AC pressure air supply time is used to make a determination for identifying the part that is a sign of an air supply abnormality or a cause of an air supply abnormality. In the lower diagram of FIG. 12 , the horizontal axis indicates the AC pressure supply time, which indicates the elapsed time from when the brake command is input and the AC pressure, which is the brake command pressure supplied to the relay valve 14, starts to be supplied, and the vertical axis indicates the AC pressure supply time. AC pressure detected by the pressure sensor 16 is shown. Further, in FIG. 12, the air supply time-AC pressure curve AA1 showing the relationship between the normal AC pressure air supply time and the AC pressure is indicated 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 an air supply abnormality sign, and the air supply showing the relationship between the AC pressure air supply time and the AC pressure at the time of air supply abnormality Each time-AC pressure curve AA3 is indicated by a dashed 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. It is determined whether or not the AC pressure supply time required for the AC pressure to rise to the fourth reference pressure P4 after being input 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. If the time is less than the sixth reference time T6 (not equal to or longer than the sixth reference time T6), that is, if it is within the normal region, it is determined that the brake control valve 13 side is supplying air correctly, and the relay valve It is determined that there is an air supply abnormality or a sign of an air supply abnormality related to the 14 side.

Diagnosis unit 31, for example, as shown in air supply time-AC pressure curve AA2 and air supply time-AC pressure curve AA3 in FIG. If the AC pressure air supply time required to rise is equal to or longer than the sixth reference time T6, that is, if it is in the air supply abnormality sign region or the air supply abnormality region, the air supply abnormality related to the brake control valve 13 or the air supply It is determined that there is a sign of anomaly.

FIGS. 13 and 14 are flowcharts showing an example flow of a sign of an air supply abnormality and determination of 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 flow of processing by the monitoring system 1 according to Embodiment 2 of the present disclosure will be described using flowcharts of FIGS. 13 and 14. FIG. As shown in FIG. 13, in step S201, the determination unit 26 of the monitoring system 1 determines whether or not a brake command has been input.

In step S201, when the determination unit 26 determines that the brake command is input (Yes), in step S202, the air supply time measurement unit 32 measures the BC pressure air supply time after the brake command is input and Measure the AC pressure air supply time. When determining in step S201 that the brake command has not been input (No), 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 reaches the fourth reference pressure P4. The BC pressure air supply time required until the fourth reference pressure P4 rises and the AC pressure air supply time required until the AC pressure rises to the fourth 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 air 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 (No), 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 to the fourth reference pressure P4 or higher.

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

In step S206, when the diagnosis unit 31 determines that the BC pressure supply time is equal to or longer than the eighth reference time T8 (Yes), in step S207, the diagnosis unit 31 determines that the brake is insufficient, It generates and outputs a brake shortage signal for notifying that there is a shortage.

Further, when the diagnostic unit 31 determines in step S206 that the BC pressure air supply time is not equal to or longer than the eighth reference time T8 (No), in step S208, the diagnostic unit 31 detects the AC pressure 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. In step S208, when the diagnosis unit 31 determines that the AC pressure air supply time is equal to or longer than the sixth reference time T6 (Yes), in step S209, the diagnosis unit 31 determines the supply time related to the brake control valve 13 side. It determines that there is an air supply abnormality, for example, generates and outputs an abnormality signal for notifying that there is an air supply abnormality related to the brake control valve 13 side. When the diagnostic unit 31 determines in step S208 that the AC pressure air supply time is not equal to or longer than the sixth reference time T6 (No), in step S210, the diagnostic unit 31 detects an air supply abnormality related to the relay valve 14 side. For example, it generates and outputs an abnormality signal for notifying that there is an air supply abnormality related to the relay valve 14 side.

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 (No), in step S211, the diagnosis unit 31 detects the AC pressure 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. In step S211, when the diagnosis unit 31 determines that the AC pressure air supply time is equal to or longer than the sixth reference time T6 (Yes), in step S212, the diagnosis unit 31 determines the supply time related to the brake control valve 13 side. It determines that there is a sign of an air supply abnormality, for example, generates and outputs a caution signal for notifying that there is a sign of an air supply abnormality related to the brake control valve 13 side. 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 (No), in step S213, the diagnostic unit 31 detects an air supply abnormality related to the relay valve 14 side. and, for example, generates and outputs a caution signal for notifying that there is a sign of air supply abnormality related to the relay valve 14 side.

Further, when the diagnostic unit 31 determines in step S204 that the BC pressure supply time is not equal to or longer than the sixth reference time T6 (No), in step S214 shown in FIG. 5 Determine whether or not the pressure has risen to the reference pressure P5. FIG. 14 shows the details of the process B after the diagnosis unit 31 determines that the BC pressure supply time is not equal to or longer than the sixth reference time T6 (No) in the process of step S204 of FIG. is.

When the diagnosis unit 31 determines in step S214 that the BC pressure has risen to the fifth reference pressure P5 (Yes), in step S215 the diagnosis unit 31 determines that the BC pressure has reached the fifth reference pressure after the brake command is input. It is determined whether or not the BC pressure supply time required for the pressure P5 to rise is equal to or longer than a 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 (No), it again determines whether the BC pressure has decreased to the fifth reference pressure P5 or higher. . That is, the determination unit 26 repeats the determination of S214 until the BC pressure rises to the fifth reference pressure P5 or higher.

When 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), in step S216, the diagnostic unit 31 determines that there is a sign of abnormal air supply. do. Further, in step S215, when the diagnosis unit 31 determines that the BC pressure supply time is not equal to or longer than the ninth reference time T9 (No), in step S217, the diagnosis unit 31 determines that the BC pressure supply time is the tenth reference time T9. It is determined whether or not it is longer than the reference time T10.

In step S217, when the diagnosis unit 31 determines that the BC pressure supply time is equal to or longer than the tenth reference time T10 (Yes), in step S218, the diagnosis unit 31 determines that the BC pressure is equal to or lower than the sixth reference pressure P6. determine whether or not In step S217, when the diagnosis unit 31 determines that the BC pressure supply time is not equal to or longer than the tenth reference time T10 (No), the diagnosis unit 31 again determines that the BC pressure supply time is equal to or longer than the tenth reference time T10. Determine whether or not That is, the determination unit 26 repeats the determination of S217 until the BC pressure air supply time reaches or exceeds the tenth reference time T10.

In step S218, when the diagnosis unit 31 determines that the BC pressure is equal to or lower than the sixth reference pressure P6 (Yes), in step S219, the diagnosis unit 31 detects the possibility that the compressed air is leaking to the atmosphere side. It is determined that there is When the diagnostic unit 31 determines in step S218 that the BC pressure is not equal to or lower than the sixth reference pressure P6 (No), the diagnostic unit 31 determines normal in step S220. In step S203, when the diagnosis unit 31 determines that the BC pressure has not risen to the fourth reference pressure P4 or higher (No), it again checks whether the BC pressure has risen to the fourth reference pressure P4 or higher. However, if the BC pressure air supply time exceeds the eighth reference time T8 for judging the brake shortage, the process of step S203 may be stopped and it may be judged that the brake is insufficient. good. In step S214, when the diagnosis unit 31 determines that the BC pressure has not risen to the fifth reference pressure P5 or higher (No), it again checks whether the BC pressure has risen to the fifth reference pressure P5 or higher. However, if the BC pressure air supply time is equal to or longer than the tenth reference time T10, the process of step S214 is stopped, and it is determined that there is a possibility that the brake is insufficient or the compressed air is leaking to the atmospheric side. You may make it judge.

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 a mechanical braking force by pressing the brake shoe 25 against the wheel 19 provided in the vehicle 2 A BC pressure sensor 17 for detecting the pressure and a BC pressure detected by the BC pressure sensor 17 after a brake command is input in a state where the vehicle 2 is stopped and a brake command is not input is used for braking. The BC pressure air supply measured by the air supply time measuring unit 32 that measures the BC pressure air supply time required to rise to the fourth reference pressure P4 set lower than the target BC pressure for the command, and the air supply time measurement unit 32 If the time is equal to or longer than a predetermined sixth reference time T6, the diagnostic unit 31 determines that there is an air supply abnormality or a sign of an air supply abnormality. It is possible to detect signs of anomalies or air supply anomalies.

According to the monitoring system 2 according to Embodiment 1 of the present disclosure, the diagnosis unit 31 determines that when the BC pressure air supply time is equal to or longer than the seventh reference time T7 set longer than the sixth reference time T6, the air supply If it is determined that there is an abnormality and the BC pressure air supply time is equal to or longer than the sixth reference time T6 and less than the seventh reference time T7, it is determined that there is a sign of an air supply abnormality. 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, the diagnosis unit 31 determines that the BC pressure supply time is equal to or longer than the eighth reference time T8 set longer than the seventh reference time T7, the insufficient braking Therefore, even when the brake is insufficient, it can be appropriately detected.

According to the monitoring system 2 according to the first embodiment of the present disclosure, the air supply time measurement unit 32 measures the BC pressure air supply after the brake command is input during the leaving inspection when the vehicle 2 is stopped. Since the time is measured, the BC pressure air supply time can be measured without being affected by the regenerative braking. It is possible to grasp that an air supply abnormality or a sign of an air supply abnormality has occurred.

The monitoring system 2 according to the first embodiment of the present disclosure includes the AC pressure sensor 16 that detects 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, The air supply time measurement unit 32 determines that the AC pressure detected by the AC pressure sensor 16 after the brake command is input while the vehicle 2 is stopped and the brake command is not input is the fourth reference. The AC pressure air supply time required to rise to the pressure P4 is measured, and if the BC pressure air supply time is equal to or longer than the sixth reference time T6, the AC pressure air supply time is equal to or longer than the sixth reference time 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 related to the relay valve 14 or a sign of an air supply abnormality. 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 equal to or longer than the sixth reference time T6, the diagnosis unit 31 determines that the air supply abnormality related to the brake control valve 13 or the air supply Since it is determined that there is a sign of an air supply 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 Embodiment 1 of the present disclosure, the air supply time measurement unit 32 sets the BC pressure measured by the BC pressure sensor 17 to the fifth reference pressure P5, which is set higher than the fourth reference pressure P4. The BC pressure air supply time required to rise is measured, and if the BC pressure air supply time is equal to or longer than a ninth reference time T9 set longer than the sixth reference time T6, the diagnosis unit 31 detects an 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 an air supply abnormality or a sign of an air supply abnormality in the stage before the brake becomes insufficient.

According to the monitoring system 2 according to Embodiment 1 of the present disclosure, the diagnostic unit 31 causes the BC pressure sensor 17 to If the measured BC pressure is equal to or lower than the sixth reference pressure P6, which is set higher than the fifth reference pressure P5, there is a possibility that compressed air is leaking from the piping of the relay valve 14 or the brake cylinder 24 to the atmospheric side. Therefore, even when the BC pressure is insufficient, it can be appropriately detected.

According to the monitoring system 2 according to Embodiment 1 of the present disclosure, since the data accumulation unit 30 is provided for accumulating the BC pressure air supply time measured by the air supply time measurement unit 32, a plurality of past BC pressure air supply Time can be used to determine an air supply abnormality or a sign of an air supply abnormality.

According to the monitoring system 2 according to Embodiment 1 of the present disclosure, the position information acquisition unit 28 that acquires the position information of the vehicle 2 is provided, and the data accumulation unit 30 measures the BC pressure air supply time, the air supply time measurement unit Since the position information of the vehicle 2 acquired by the position information acquisition unit 28 when the BC pressure supply time is measured by 32 is linked and accumulated, the BC pressure supply time when the vehicle 2 was stopped is stored. you can figure out if there is.

According to the monitoring system 2 according to Embodiment 1 of the present disclosure, the temperature sensor 23 that detects the temperature information around the brake device 18 is provided, and the data accumulation unit 30 measures the air supply time during the BC pressure air supply time. Since the temperature information detected by the temperature sensor 23 when measuring the BC pressure air supply time by the unit 32 is linked and accumulated, it is the BC pressure air supply time when the temperature around the brake device 18 was It is possible to grasp whether

In addition, in the monitoring system 1 according to the second embodiment, as shown in FIG. 31 is not limited to being provided in the ground device 8, and may be configured to be provided in the brake control device 3, the central device 5, or the like provided in the vehicle 2, for example.

Further, in the monitoring system 1 according to the first embodiment, as shown in FIGS. When it is determined that a brake command has been input in a state where the air supply time measurement unit 32 is not in a state where the brake command is input, an air supply abnormality or a sign of an air supply abnormality is determined using one BC pressure air supply time measured by the air supply time measurement unit 32. example. 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 obtains a plurality of BC pressure air supply times within the second period. Air supply abnormality or a sign of air supply abnormality may be determined by obtaining the tendency of . 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 temporal changes in brake cylinder pressure air supply time. In FIG. 15, the horizontal axis indicates the date, and the vertical axis indicates the BC pressure supply time required for the BC pressure detected by the BC pressure sensor 17 to rise to the fourth reference pressure P4 after the brake command is input. The BC pressure air supply time is, for example, the BC pressure air supply time measured by the air supply time measurement unit 32 each time the vehicle 2 is inspected when it leaves the garage. FIG. 15 shows BC pressure air supply time for 10 days as an example. In FIG. 15, the dates on the horizontal axis are represented by the 1st to 10th days, but may be represented by year, month, and day. In addition, the diagnosis unit 31 does not necessarily need to acquire the BC pressure supply time for each day, and the BC pressure supply time for each predetermined period set shorter than the second period (for example, every week) You may make it acquire time. Further, the diagnosis unit 31 may acquire a statistical value such as an average value of a plurality of BC pressure air supply times measured by the air supply time measurement unit 32 during a predetermined period. The plurality of BC pressure air supply times measured by the air supply time measurement 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, Information such as environment information, temperature information, date and time information, brake command information, and door opening/closing information are associated with each other and stored in the data storage unit 30 of the ground equipment 8 . For example, as shown in FIG. 15, the diagnosis unit 31 may obtain a temporal trend by estimating a trend or the like using the BC pressure air supply time within the second period. Further, the diagnosis unit 31 performs machine learning by combining information such as environmental information and temperature information accumulated in the data accumulation unit 30 together with a plurality of BC pressure supply times to detect an exhaust abnormality or an exhaust abnormality. You may make it diagnose the symptom of.

In addition, the diagnosis unit 31 determines, for example, a predetermined number of times within the air supply abnormality portent region in which the BC pressure air supply time within the second period is equal to or longer than the sixth reference time T6 and less than the seventh reference time T7. It may be determined that there is a sign of an air supply abnormality related to the BC pressure when it is contained in a proportion equal to or greater than a predetermined ratio.

Each device included in the monitoring system 1 according to Embodiments 1 and 2 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 realizing each device provided in the monitoring system 1 according to Embodiments 1 and 2 of the present invention. As shown in FIG. 16, each device included in the monitoring system 1 according to Embodiments 1 and 2 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 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 memories 102 may be provided.

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

1 Monitoring System 2 Vehicle 3 Brake Control Device 16 AC Pressure Sensor 17 Brake Cylinder Pressure Detector 18 Brake Device 19 Rotating Body (Wheel) 23 Temperature Detector 24 Brake Cylinder 25 Friction Material (Bracket) , 26 determination unit, 27 exhaust time measurement unit, 28 position information acquisition unit, 29 environment information acquisition unit, 30 data accumulation unit, 31 diagnosis unit, 32 air supply time measurement unit

Claims (26)

a brake cylinder pressure detection unit that detects a brake cylinder pressure that indicates the pressure of a brake cylinder of a brake device that generates a mechanical braking force by pressing a friction material against a rotating body provided in the vehicle;
The brake cylinder pressure detected by the brake cylinder pressure detecting unit after the brake command is released in a state in which the vehicle is stopped and a brake command is input is a predetermined first reference. an exhaust time measurement unit that measures the time required for the brake cylinder pressure to be exhausted until the pressure drops;
a diagnosis unit that determines that there is an exhaust abnormality or a sign of an exhaust abnormality 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 surveillance system comprising: The diagnosis unit determines that there is an exhaust abnormality when the brake cylinder pressure exhaust time is equal to or longer than a second reference time set longer than the first reference time, and
2. 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. . 3. The diagnosis unit according to claim 2, wherein when the brake cylinder pressure exhaust time is equal to or longer than a third reference time set longer than the second reference time, the diagnosis unit determines that the brake is not released. monitoring system. 3. The exhaust time measurement unit measures the brake cylinder pressure exhaust time after the brake command is canceled when the vehicle is stopped at a station or when leaving the garage for inspection. The surveillance system according to any one of claims 1 to 3. The diagnosis unit acquires a plurality of the brake cylinder pressure exhaust times measured by the exhaust time measurement unit within a predetermined first period, and acquires the brake cylinder pressure exhaust times within the first period. 5. The monitoring system according to any one of claims 1 to 4, wherein a tendency of is obtained. The diagnosis unit determines that the brake cylinder pressure exhaust time within the first period is equal to or longer than the first reference time and is less than a second reference time set longer than the first reference time, and is within the exhaust abnormality sign region. 6. The monitoring system according to claim 5, wherein the monitoring system according to claim 5 determines that there is a sign of the exhaust anomaly when it is included in the number of times or more than a predetermined number of times or at a rate of a predetermined rate or more. an AC pressure detection unit that detects an AC pressure indicating the pressure of compressed air supplied from the brake control valve to the relay valve as a brake command pressure;
The exhaust time measurement unit measures an AC pressure required for the AC pressure detected by the AC pressure detection unit to decrease to the first reference pressure after the brake command is released in a state where the brake command is input. Measure the exhaust time,
The diagnostic unit determines whether or not the AC pressure exhaust time is equal to or longer than the first reference time when the brake cylinder pressure exhaust time is equal to or longer than the first reference time, and
7. The method according to any one of claims 1 to 6, wherein if the AC pressure exhaust time is not equal to or longer than the first reference time, it is determined that there is the exhaust abnormality related to the relay valve or a sign of the exhaust abnormality. or the monitoring system according to claim 1. The diagnostic unit determines that there is the exhaust abnormality or a sign of the exhaust abnormality related to the brake control valve when the AC pressure exhaust time is equal to or longer than the first reference time. 8. The surveillance system according to 7. The exhaust time measurement unit measures the brake cylinder pressure exhaust time required for the brake cylinder pressure measured by the brake cylinder pressure detection unit to decrease to a second reference pressure set lower than the first reference pressure. ,
The diagnostic unit determines that there is the exhaust abnormality or a sign of the exhaust abnormality when the brake cylinder pressure exhaust time is equal to or longer than a fourth reference time set longer than the first reference time. The surveillance system according to any one of claims 1 to 8. The third reference time is set longer than the second reference time set longer than the first reference time, and the diagnosis unit determines the fifth reference time set longer than the third reference time and the fourth reference time. When the brake cylinder pressure measured by the brake cylinder pressure detecting unit is equal to or higher than the third reference pressure set lower than the second reference pressure , there is a possibility that the SR pressure leaks into the relay valve. 10. The monitoring system of claim 9, wherein it is determined that there is a a brake cylinder pressure detection unit that detects a brake cylinder pressure that indicates the pressure of a brake cylinder of a brake device that generates a mechanical braking force by pressing a friction material against a rotating body provided in the vehicle;
In a state where 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. an air supply time measurement unit that measures the time required for the brake cylinder pressure to rise to a fourth reference pressure set lower than the cylinder pressure;
a diagnosis unit that determines that there is an air supply abnormality or a sign of an air supply abnormality when the brake cylinder pressure air supply time measured by the air supply time measurement unit is equal to or longer than a predetermined sixth reference time;
A surveillance system comprising: The diagnosis unit determines that there is an air supply abnormality when the brake cylinder pressure air supply time is equal to or longer than a seventh reference time set longer than the sixth reference time,
12. The system according to 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. 13. The diagnosis unit according to claim 12, wherein when the brake cylinder pressure air supply time is equal to or longer than an eighth reference time set longer than the seventh reference time, the diagnosis unit determines that the brake is insufficient. monitoring system. 12. The air supply time measurement unit measures the brake cylinder pressure air supply time after the brake command is input at the time of leaving inspection while the vehicle is stopped. 14. A surveillance system according to any one of claims 13 to 14. The diagnostic unit acquires a plurality of brake cylinder pressure air supply times measured by the air supply time measurement unit within a predetermined second period, and obtains the brake cylinder pressure within the second period. 15. A monitoring system according to any one of claims 11 to 14, characterized in that it determines a trend of the air supply time. The diagnostic unit detects an air supply abnormality sign that the brake cylinder pressure air supply time within the second period is equal to or longer than the sixth reference time and is less than a seventh reference time set longer than the sixth reference time. 16. The monitoring system according to claim 15, wherein when it is included in the region a predetermined number of times or more or a predetermined ratio or more, it is determined that there is a sign of the air supply abnormality. an AC pressure detection unit that detects an AC pressure indicating the pressure of compressed air supplied from the brake control valve to the relay valve as a brake command pressure;
The air-supply time measurement unit measures the AC pressure detected by the AC pressure detection unit after the brake command is input in a state in which the vehicle is stopped and a brake command is not input. Measure the AC pressure air supply time required to rise to the fourth reference pressure,
The diagnostic unit determines whether or not the AC pressure air supply time is equal to or longer than the sixth reference time when the brake cylinder pressure air supply time is equal to or longer than the sixth reference time, and
If the AC pressure air supply time is less than the sixth reference time, it is determined that there is the air supply abnormality or a sign of the air supply abnormality related to the relay valve. 17. A surveillance system according to any one of clause 16. When the AC pressure air supply time is equal to or longer than the sixth reference time, the diagnosis unit determines that there is the air supply abnormality related to the brake control valve or a sign of the air supply abnormality. 18. The surveillance system of claim 17. The air supply time measurement unit measures the brake cylinder pressure supply time required for the brake cylinder pressure measured by the brake cylinder pressure detection 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 a ninth reference time set longer than the sixth reference time, the diagnosis unit determines that there is the air supply abnormality or a sign of the air supply abnormality. 19. The surveillance system according to any one of claims 11 to 18, characterized by: The diagnosis unit detects the brake cylinder pressure when an eighth reference time set longer than a seventh reference time set longer than the sixth reference time and a tenth reference time set longer than the ninth reference time elapse. When the brake cylinder pressure measured by the detection unit is equal to or lower than the sixth reference pressure set higher than the fifth reference pressure , compressed air is leaking from the relay valve or the piping of the brake cylinder to the atmosphere side. 20. The surveillance system of claim 19, determining that there is a possibility. 11. The monitoring system according to any one of claims 1 to 10, further comprising a data accumulation unit that accumulates the brake cylinder pressure exhaust time measured by the exhaust time measurement unit. A position information acquisition unit that acquires position information of the vehicle,
The data accumulating unit links the position information of the vehicle acquired by the position information acquiring unit when the brake cylinder pressure exhaust time is measured by the exhaust time measurement unit to the brake cylinder pressure exhaust time. 22. The monitoring system according to claim 21, wherein the data is stored by attaching. A temperature detection unit that detects temperature information around the brake device,
The data storage unit associates the temperature information detected by the temperature detection unit when the brake cylinder pressure exhaust time is measured by the exhaust time measurement unit with the brake cylinder pressure exhaust time and stores the temperature information. 23. The surveillance system according to claim 21 or 22, characterized in that: 21. The monitoring system according to any one of claims 11 to 20, further comprising a data accumulation unit that accumulates the brake cylinder pressure air supply time measured by the air supply time measurement unit. A position information acquisition unit that acquires position information of the vehicle,
The data accumulation unit links the position information of the vehicle acquired by the position information acquisition unit when the brake cylinder pressure air supply time is measured by the air supply time measurement unit to the brake cylinder pressure air supply time. 25. The monitoring system according to claim 24, wherein the data is stored with a tag. A temperature detection unit that detects temperature information around the brake device,
The data storage unit associates the brake cylinder pressure air supply time with the temperature information detected by the temperature detection unit when the brake cylinder pressure air supply time is measured by the air supply time measuring unit and accumulates the temperature information. 26. A surveillance system according to claim 24 or 25, characterized in that:

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