JP5634848B2 - Train monitoring system and train monitoring method - Google Patents

Description

  The present invention relates to a video surveillance system for the purpose of crime prevention, security, and passenger safety in and outside a railway vehicle, and in particular, monitors the operating state of equipment installed as a surveillance system, and causes a failure or malfunction that has occurred. It is related to the state detection of the train monitoring system that provides information on the occurrence of failures such as, etc., and determines whether or not it can be restored.

  Conventionally, a train monitoring system is often constructed and installed for video monitoring inside and outside a train (see Patent Document 1). The train monitoring system is a system that manages all vehicles, and has information about vehicles. However, the conventional train monitoring system does not have a function of controlling the monitoring equipment by actively utilizing the information held by the train monitoring system.

JP 2009-273209 A JP 2002-141920 A

In the conventional train monitoring system, when a failure such as a failure or malfunction occurs, information such as the video display of the problem location and log recording (which device went down when) can be shared only locally. . In order to construct a train monitoring system that can grasp the occurrence of all faults, a control device that mediates between the train monitoring system and each monitoring device is required. Furthermore, in the conventional train monitoring system, even if a failure occurs, it is a system that continuously monitors the monitoring device in which the failure occurred, and the function of the entire system deteriorates. Some train monitoring systems go down. As a result, the reliability of the train monitoring system decreases.
Patent Document 1 integrates and manages a plurality of trains and their individual train monitoring systems as a single train monitoring system by connecting them when they are connected. However, even in the case of a train monitoring system between connected trains, as described above, when a failure occurs, information such as the video display of the problem location and log recording (which device went down when) You can only share information locally.
In Patent Document 2, polling is repeated toward a node connected to the network, and when there is no response even after repeating a predetermined number of retries, it is determined to be abnormal. Discloses a node monitoring system for disconnecting from the system. However, there is no disclosure about management that integrates a plurality of systems, not a train monitoring system.
In view of the above problems, an object of the present invention is to provide a train monitoring system that can grasp the occurrence of all faults when a fault occurs. Furthermore, it is providing the train monitoring system which improves the reliability of a system.

  In order to achieve the above object, in the train monitoring system of the present invention, the train monitoring system including the entire vehicle management system and each monitoring device is provided between the entire vehicle management system and the monitoring device. The vehicle information control apparatus which detects the state of each monitoring apparatus is provided.

  That is, the train monitoring system of the present invention includes a monitoring camera arranged for monitoring a train inside and outside the vehicle, a video recording device for recording a monitoring video captured by the monitoring camera, and a live video of the monitoring video or A video display device for displaying the recorded surveillance video, a whole vehicle management system for holding train vehicle information, a vehicle information control device for receiving necessary information from the whole vehicle management system, the vehicle information control device, and In a train monitoring system comprising the monitoring camera that is a monitoring device, the video display device, and a switching hub that LAN-connects the video recording device, the vehicle information control device is the monitoring camera that is the monitoring device, The video display device, the video recording device, and the switching hub are each checked for operation at a predetermined first time interval. In response to the transmitted operation confirmation signal, whether or not a normal signal is transmitted from the monitoring camera, the video display device, the video recording device, and the switching hub that are the respective monitoring devices If the normal signal is not received even after the predetermined first time has elapsed, retry is performed again at a predetermined second time interval, and the number of retries reaches the predetermined number of times. When a normal signal is not received, it is determined that a failure has occurred in the monitoring device, and transmission of an operation confirmation signal to the monitoring device that has been determined to have failed has been stopped for a predetermined second time It is.

  In the train monitoring system of the present invention, when the vehicle information control device determines that a failure has occurred in the monitoring device, the vehicle information control device further transmits an abnormality occurrence signal for notifying failure information to the all vehicle management system. To do.

According to the present invention, the vehicle information control device is intervened to appropriately develop information on the problem location, adjust the communication line between the monitoring device in which a failure such as failure or failure occurs, and the vehicle information control device, and train monitoring system And the load increase of the all vehicle management system can be suppressed. As a result, reliability can be maintained even when a failure occurs in the monitoring device.
In addition, there is often no means for reducing the function for maintaining the reliability of the entire system.

It is a block diagram which shows the structure of one Example of the train monitoring system of this invention. It is a schematic diagram for demonstrating the signal path | route when a video recording device fails (failure generate | occur | produces) in one Example of the train monitoring system of this invention. 6 is a time chart for explaining the flow of information when the video recording apparatus fails (failure occurs) in one embodiment of the train monitoring system of the present invention. It is a schematic diagram which shows one Example of the display screen of the video display apparatuses 3a-3d when a failure generate | occur | produces. It is a schematic diagram which shows one Example of the display screen of the video display apparatuses 3a-3d when a failure generate | occur | produces.

An embodiment of the train monitoring system of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of an embodiment of a train monitoring system of the present invention. 8 is a train on which the train monitoring system of the present invention is installed, 8a is a leading vehicle ((m) is a vehicle starting from the leading vehicle side, 8b is an n-1th vehicle from the leading vehicle, 8d is a rear vehicle ((m + N ) Vehicle), 8c is the second vehicle from the rear vehicle 8d, where m is a fixed natural number (for example, m = 1), n is a natural number starting from 1, N is the maximum value of n and N Is the maximum number of trains minus 1. Also, 1a, 1b, 1c, and 1d are surveillance cameras (SC), 2a, 2b, 2c, and 2d are switching hubs (SWH), and 3a and 3d are video display devices. (NM), 4a, 4b, 4c and 4d are video recording devices (IR), 5a and 5d are vehicle information control devices (SPC), 6a, 6b, 6c and 6d are power supply devices (PW), 7a and 7d. Is the whole vehicle management system It is a Temu (TMS).
In this document, the monitoring device is a generic term for the monitoring cameras 1a to 1d, switching hubs 2a to 2d, video display devices 3a and 3d, video recording devices 4a to 4d, and vehicle information control devices 5a and 5d. This is referred to as a monitoring device.

The (m) car 8a of the leading vehicle of the train is provided with a monitoring camera 1a, a switching hub 2a, a video display device 3a, a video recording device 4a, a vehicle information control device 5a, a power supply device 6a, and an all-vehicle management system 7a. Has been. In the (m + N) car as the last vehicle, a surveillance camera 1d, a switching hub 2d, a video display device 3d, a video recording device 4d, a system control device 5d, a power supply device 6d, and an all-vehicle management system 7d are installed. ing.
The (m + n) car has three surveillance cameras 1b, a switching hub 2b, a video recording device 4b, and a power supply device 6b. The (m + N-1) car has three surveillance cameras 1c, a switching hub 2c, and video. A recording device 4c and a power supply device 6c are installed.
In this manner, the video display device 1a or 1d, the vehicle information control device 5a or 5d, and the entire vehicle management system 7a or 7d are installed in the first and last vehicles.

  For each vehicle that monitors the inside and outside of a train, a power supply device (PW) that supplies power to each monitoring device, a video recording device (IR) that records surveillance video, and a surveillance camera that captures video inside and outside the vehicle ( SC), a switching HUB (SWH) for communicating each monitoring device is installed. Furthermore, a video display device, a vehicle information control device, and a whole vehicle management system are installed exclusively for the leading vehicle and the rear vehicle.

  The monitoring cameras 1a to 1d may be any type such as a CCTV camera or a network camera. In addition, the monitoring locations captured by the monitoring cameras 1a to 1d are also arbitrary depending on the purpose, such as the front image of the front / rear vehicle, the in-vehicle image, the outside / inside door opening / closing image, the driver's cab image, and the conductor's compartment image. Therefore, in FIG. 1, surveillance cameras are installed only in the leading vehicle and the rear vehicle, but they are installed in any vehicle and place depending on the purpose.

  In FIG. 1, each monitoring device is connected to switching hubs 2 a to 2 d installed in individual vehicles 8 a to 8 b of a connected train 8, and the switching hubs 2 a to 2 d of each vehicle 8 a to 8 b are adjacent to each other. The vehicles are connected by a transmission line such as a LAN cable. The entire system is LAN-connected via the switching hubs 2a to 2d.

Next, the overall operating environment of the train monitoring system of the present invention will be described.
The images of the monitoring cameras 1a to 1d communicated via the LAN are displayed on the image display devices 3a and 3d in the leading vehicle 8a and the rear vehicle 8d. The video display devices 3a and 3d normally display the video of the surveillance camera installed in the vehicle in which the video display device is installed in real time.
However, the user selects the number of display screens (number of screen divisions) displayed on the display screen of the video display device by operating the video switching button of the video display device, or by selecting the video of the vehicle. Can be arbitrarily switched to the number of display screens and the image of the desired vehicle.
In addition, when a warning button installed in the train is pushed by a user such as a passenger or crew, or when a failure such as a failure or malfunction occurs in the monitoring device, it is determined as an abnormal state, and the occurrence location Are automatically switched so as to be displayed on the video display device. That is, when the system control device 5a determines that the train is in an abnormal state that hinders operation, a failure has occurred in all of the video display devices 3a to 3d to notify the inside of the vehicle of the abnormal state. An abnormality display signal for displaying an overall view of the vehicle (overall view of the vehicle) is transmitted, and an abnormality occurrence location is displayed on the display screens of all the video display devices 3a to 3d so that the conductor can be confirmed.

  The video recording devices 4a to 4d record the monitoring video input for each vehicle. In that case, the surveillance camera always images and outputs the surveillance video. However, each of the video recording devices 4a to 4d, for example, constantly records the output monitoring video of the in-vehicle monitoring camera, and the train is stopped traveling or the traveling speed falls below a predetermined value based on the output monitoring video of the monitoring camera outside the vehicle. Only when a sudden braking or the like is applied and a predetermined acceleration or more is applied.

  The vehicle information control devices 5a and 5d installed in the leading vehicle and the rear vehicle regularly collect all vehicle information related to the trains held by the all-vehicle management system 7a or 7d via the vehicle information transmission / reception interface provided by each vehicle, System control is performed by transmitting appropriate communication data according to the situation.

In the train monitoring device state detection operation in one embodiment of the train monitoring system of the present invention, a response signal due to a retry operation is transmitted to a monitoring device that may cause a failure such as a failure or failure. If there is no response from the monitoring device even if the retry is executed a predetermined number of times (for example, 3 times), the monitoring device is determined to be in failure and temporarily disconnected from the system.
Thereby, the load applied to the train monitoring system is reduced, and the performance of the system is maintained so that the operation response and the communication speed are not lowered. However, in consideration of maintainability, a response signal is also sent at a predetermined interval (for example, once per minute) to a monitoring device that has been determined to have failed, so that recovery can be confirmed. It is.

In order to determine the occurrence of a failure such as a failure or malfunction by a retry operation, for example, between the vehicle information control device and each monitoring device, check the operation at a predetermined time interval (for example, 1 minute interval) from the vehicle information control device side. When the signal is transmitted and the counterpart monitoring device receives the operation confirmation signal, it transmits a normal signal (ACK signal). The vehicle information control device determines that the monitoring device is normal by receiving a normal signal from the monitoring device.
In addition, the vehicle information control device has a failure with respect to a monitoring device that cannot receive an operation confirmation signal transmitted from the vehicle information control device side or a monitoring device that cannot receive (transmit) a normal signal within a predetermined time even if received. It is determined that there is a possibility.
Therefore, the vehicle information control apparatus repeatedly transmits an operation confirmation signal at a predetermined time interval to a monitoring device that may have a failure, and when there is no reply even if it is transmitted a predetermined number of times. Determines that the monitoring device to which the operation confirmation signal is transmitted is in a failure occurrence state such as a failure or a malfunction.

With reference to FIG. 2, the signal path of the retry operation of the train monitoring device state detection operation in one embodiment of the train monitoring system of the present invention will be described. FIG. 2 is a schematic diagram for explaining a signal path when the video recording device 4a fails (failure occurs) in one embodiment of the train monitoring system of the present invention.
First, the vehicle information control device 5a transmits an operation confirmation signal to the video display device 3a via the switching hub 2a (path 21).
Next, in response to the received operation confirmation signal, the video display device 3a sends an ACK (Acknowledge) signal notifying that the self-monitoring device is operating normally via the switching hub 2a to the vehicle information control device 5a. become.
However, when a failure occurs in the video display device 3a, a normal signal cannot be returned (transmitted) within a predetermined time (path 22).
Therefore, the vehicle information control device 5a that has not received the normal signal from the video display device 3a within the predetermined time retry again to the monitoring device (video display device 3a) that has not received the normal signal after the predetermined time interval (ie, , Send the operation confirmation signal again.)
When the vehicle information control device 5a executes the number of retries more than a predetermined number of times and cannot receive a normal signal from the video display device 3a within a predetermined time, the vehicle information control device 5a has a problem with the monitoring device (video display device 3a). Is determined to have occurred.

  The vehicle information control device 5a that has determined that a failure has occurred in any of the monitoring devices, then transmits an abnormality occurrence signal for notifying failure information to the all vehicle management system 7a (path 23). The all-vehicle management system 7a transmits the received failure information to the operating company in order to identify the location where the failure has occurred, eliminate the cause of the failure, and restore the monitoring device in which the failure has occurred. As a result, the operating company can know the occurrence and location of the failure, and can quickly start the recovery work.

And the vehicle information control apparatus 5a transmits the abnormal display signal for displaying the position of the monitoring apparatus which the failure generate | occur | produced on the video display apparatus 3a via the switching hub 2a. This abnormality display signal is transmitted to all the video display devices of all the vehicles belonging to the train monitoring system via the switching hub (path 24). Accordingly, the display screens of all the video display devices are controlled so as to display the positions of the monitoring devices where the abnormality has occurred.
Even if an abnormality has occurred, if the user presses the monitoring camera switching button, it is possible to stop displaying the position of the monitoring device where the abnormality (failure) has occurred and return to the normal live video.

Furthermore, the vehicle information control device 5a stops the transmission of the operation confirmation signal for a predetermined time to the monitoring device that has determined that a failure has occurred (path 25). This stop time is at least twice as long as the retry time interval (for example, 10 times, 30 times, etc.).
When a failure occurs, the load on the monitoring device (for example, a video display device) where the failure has occurred increases, and when an operation confirmation signal is received, the operation response becomes dull even if a normal signal can be transmitted. , It becomes impossible to transmit within a predetermined time or it becomes a long time. In this case, the vehicle information control device 5a waits until receiving a normal signal from the monitoring device or until a predetermined time elapses, and then transmits an operation confirmation signal to the next monitoring device. For this reason, the monitoring time of 1 period in a train monitoring system will increase, and efficiency and reliability will fall.
However, according to the present embodiment, since the transmission of the operation confirmation signal is stopped for the monitoring device in which the failure has occurred, it is possible to prevent the monitoring time from being prolonged.

Next, a series of information flow (information signal transmission / reception) performed between train monitoring devices at the time of failure in one embodiment of the monitoring system of the present invention will be described with reference to FIGS. FIG. 3 is a time chart for explaining the flow of information when the video recording apparatus fails (failure occurs) in one embodiment of the train monitoring system of the present invention. The signal timing described in FIG. 3 is only related to the video recording apparatus. Moreover, although not shown in figure, transmission / reception of information is processed in parallel with respect to each monitoring apparatus.
3A is a transmission signal of the vehicle information control device 5a, FIG. 3B is a transmission signal of the video recording device 4a, FIG. 3C is a transmission signal of the video display device 3a, and FIG. It is a transmission signal of the vehicle management system 7a. The horizontal axis is the time common to FIGS. The vertical axis indicates whether the signal is a high (high) level or a low (low) level in a pulse waveform. Here, it is assumed that the operation confirmation signal and the ACK signal are output when the signal is at a high (high) level, and there is no signal output when the signal is at a low (low) level. As for the reception state, the transmission signal is always received almost simultaneously with the transmission through the paths 21 to 25, and is not particularly shown.

  2 and 3, in a normal state (time T1), a signal is transmitted between the vehicle information control device 5a and each monitoring device (in this example, the video recording device 4a) at a predetermined time interval (for example, one minute interval). Are exchanged (transmission / reception of an operation confirmation signal and an ACK signal), and it is confirmed at regular intervals whether there is an abnormality (path 21). In addition, at the time T1 when all the monitoring devices are operating normally, the video display device 3a displays the monitoring video of the monitoring camera as a live video. That is, the video display device 3a displays a normal monitoring video as a live video while not receiving the abnormal display signal transmitted from the vehicle information control device 5a.

Next, at the time of failure, first during failure determination (time T2), when the video recording device 3a fails, there is no response to the operation confirmation signal transmitted from the vehicle information control device 5a (ACK signal). Cannot be received by the vehicle information control device 5a: the route 22) is entered. On the other hand, if the vehicle information control device 5a repeats the retry a predetermined number of times and does not receive a normal response signal (ACK signal) from the video recording device 3a even if the predetermined number of times is reached, there is a failure. It is determined that it has occurred.
When it is determined that a failure has occurred, the vehicle information control device 5a promptly transmits failure information (abnormality occurrence signal) to the entire vehicle management system 7a (path 23) (time T3).
Thereafter, the vehicle information control device 5a transmits an abnormality display signal for displaying the entire vehicle view to the video display device 3a (and 3b to 3d) in order to notify the inside of the vehicle of the abnormal situation (path 24) (time T4). Then, control is performed such that the location where the abnormality has occurred is displayed on the display screen of the video display device so that the user, such as a conductor, can confirm (time T4, T5).

Furthermore, the vehicle information control device 5a stops the transmission to the operation confirmation signal to the monitoring device (here, the video recording device 4a) that has determined that a failure has occurred (time T5).
Thereafter, the vehicle information control device 5a continues to display the location where the abnormality has occurred on the display screen of the video display device 3a until the abnormality is canceled or an external operation is received (time t0).
The release of the abnormality means that the video recording device 4a can operate normally, and the operation from the outside is, for example, when the surveillance camera switching button of the video display device 3a is pressed.
As described with reference to FIG. 2, the vehicle information control device 5a stops the transmission of the operation confirmation signal for a predetermined time (stops monitoring) to the monitoring device that has determined that a failure has occurred. And after this stop time passes, a start is restarted again. The operation stop signal transmission stop time is twice or more longer than the retry time interval (for example, 10 times, 30 times, etc.).

FIG. 4 is a schematic diagram illustrating an example of display screens of the video display devices 3a to 3d when a failure occurs. 40 is a display screen, 41 is a housing accommodating the monitoring equipment of the train monitoring system, 42 is an exterior / inside door, 43 is a seat, 44 is a video recording device accommodated in the housing 41, 45 is an alarm display, 48 is a schematic external shape of the vehicle of the No. X vehicle.
The image of the entire vehicle is installed in the video display device in advance as a viewer, and the video display device automatically starts up the viewer when a failure occurs (when an abnormal display signal is received). An abnormal part is displayed based on the abnormality information of the transmitted abnormality display signal. In the embodiment of FIG. 4, the video recording device 44 is displayed in the housing 41 assuming that a failure has occurred in the video recording device 44. In addition, the failure information is displayed as text information in the display screen 40. The text information is, for example, the vehicle number (No. X car) in which the failure has occurred, the date (YYYY / MM / DD), the time (hh: mm), and the comment (abnormality occurrence) in which it is determined that the failure has occurred. The display of the device in which these faults have occurred and the display of the text information may be highlighted so that they can be distinguished from other displays (for example, displayed in a more conspicuous color than other display colors). . For example, the other display is black or gray, and the display of the device related to the failure and the display of the text information are red. Alternatively, it may be blinked.

  In FIG. 4, when another alarm button is pressed, for example, when another alarm button is continuously pressed and multiple failures occur simultaneously, priority is given to the abnormality that occurred later. indicate.

In addition, as shown in FIG. 5, the train whole figure 51 which comprises a train monitoring system is displayed on the display screen 50, the failure-occurring vehicle part 52 equivalent to the vehicle in which the failure occurred is highlighted, and the failure has occurred. You may make it understand visually where the vehicle is in the whole train.
As a result, when a failure (abnormality of monitoring equipment, abnormality due to an alarm button) occurs, a diagram that configures the entire train is displayed on the display screen, and which vehicle is the faulty vehicle (number car) The user can see at a glance, quickly and easily.

According to the above embodiment, by mediating the vehicle information control device, appropriately develop information on the problem location, adjust the communication line between the monitoring device and the vehicle information control device in which a failure such as failure or failure occurred, The load increase of the train monitoring system and the entire vehicle management system can be suppressed. As a result, reliability can be maintained even when a failure occurs in the monitoring device.
Furthermore, according to the train monitoring system of the above embodiment, when a failure occurs, monitoring of the monitoring device in which the failure has occurred is stopped, so that the reliability of the train monitoring system is improved. In addition, monitoring of the monitoring device in which the failure has occurred is automatically started again after a predetermined time has elapsed since the monitoring was stopped. Since it can be resumed, the reliability of the train monitoring system is further improved.

  1a, 1b, 1c, 1d: surveillance camera (SC), 2a, 2b, 2c, 2d: switching hub (SWH), 3a, 3d: video display device (NM), 4a, 4b, 4c, 4d: video recording device (IR), 5a, 5d: Vehicle information control device (SPC), 6a, 6b, 6c, 6d: Power supply device (PW), 7a, 7d: All vehicle management system (TMS), 8: Train, 8a: Lead vehicle 8b: n-1st vehicle from the first vehicle, 8c: second vehicle from the rear vehicle, 8d: rear vehicle, 40: display screen, 41: chassis, 42: outside / inside door, 43: seat, 44: Video recording device, 45: display, 48: outer shape, 50: display screen, 51: overall train view, 52: vehicle part where failure occurred.

Claims (6)

Surveillance camera arranged to monitor the inside or outside of the train, a video recording device for recording the surveillance video captured by the surveillance camera, and a video display device for displaying the surveillance video live video or the recorded surveillance video An all-vehicle management system that holds train vehicle information, a vehicle information control device that receives necessary information from the all-vehicle management system, the vehicle information control device, and the monitoring camera that is a monitoring device, the video In a train monitoring system comprising a display device and a connection device for connecting the video recording device to a network,
The vehicle information control device transmits an operation confirmation signal at a first time interval to each of the monitoring camera, the video display device, the video recording device, and the connection device that are the monitoring devices. the monitoring camera in response to said operating confirmation signal is each of the monitoring devices, the video display device, and the video recording device, and checks whether normal signal from the connected device has been transmitted, the normal If the signal is not received, the operation confirmation signal is transmitted again at the first time interval, and the normal signal is not received even if the number of times the operation confirmation signal is transmitted reaches a predetermined number. Determining that a failure has occurred in the monitoring device, stopping the transmission of the operation confirmation signal to the monitoring device that has determined that the failure has occurred for a second time, and after the elapse of the second time, Re Train monitoring system and transmits the operation confirmation signal. The vehicle information control device, when any of the monitoring equipment failure is determined to have occurred, and transmits the information relating to the monitoring device to the image display device, determining that the video display device, fails The train monitoring system according to claim 1, wherein information related to the monitored equipment is displayed. The train monitoring system according to claim 1 or 2, wherein the second time is at least twice as long as the first time interval. Surveillance camera arranged to monitor the inside or outside of the train, a video recording device for recording the surveillance video captured by the surveillance camera, and a video display device for displaying the surveillance video live video or the recorded surveillance video An all-vehicle management system that holds train vehicle information, a vehicle information control device that receives necessary information from the all-vehicle management system, the vehicle information control device, and the monitoring camera that is a monitoring device, the video In a train monitoring system comprising a display device and a connection device for connecting the video recording device to a network,
The vehicle information control device transmits an operation confirmation signal at a first time interval to each of the monitoring camera, the video display device, the video recording device, and the connection device that are the monitoring devices. the monitoring camera in response to said operating confirmation signal is each of the monitoring devices, the video display device, and the video recording device, and checks whether normal signal from the connected device has been transmitted, the normal If the signal is not received, the operation confirmation signal is transmitted again at the first time interval, and the normal signal is not received even if the number of times the operation confirmation signal is transmitted reaches a predetermined number. Determining that a failure has occurred in the monitoring device, stopping the transmission of the operation confirmation signal to the monitoring device that has determined that the failure has occurred for a second time, and after the elapse of the second time, Re Train monitoring method characterized by transmitting the operation confirmation signal. The vehicle information control device, when any of the monitoring equipment failure is determined to have occurred, and transmits the information relating to the monitoring device to the image display device, determining that the video display device, fails The train monitoring method according to claim 4, further comprising: displaying information on the monitored equipment. 6. The train monitoring method according to claim 4, wherein the second predetermined time is a time that is at least twice as long as the first time interval.

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