WO2016051468A1

WO2016051468A1 - Train monitoring system

Info

Publication number: WO2016051468A1
Application number: PCT/JP2014/075905
Authority: WO
Inventors: 伊藤　哲也
Original assignee: 株式会社日立国際電気
Priority date: 2014-09-29
Filing date: 2014-09-29
Publication date: 2016-04-07
Also published as: JPWO2016051468A1

Abstract

This train monitoring system includes cameras which are installed on a train, and which each take images of an area to be monitored, lights which each illuminate the area to be monitored, a running distance obtaining unit which obtains information on the running distance of the train, a positional information storing unit which stores, in advance, positional information for turning on the lights, and a control unit which turns on the lights on the basis of the running distance obtained by the running distance obtaining unit and the information stored in the positional information storing unit.

Description

Train monitoring system

The present disclosure relates to a train monitoring system and can be applied to, for example, a pantograph monitoring system including a camera with an LED.

For example, Japanese Patent Application Laid-Open No. 8-336204 describes that, while traveling on a train, a mark mark affixed to a pantograph is illuminated with a projector and imaged with a CCD camera to analyze the motion state of the pantograph. .

JP-A-8-336204

As a result of studying a system (train monitoring system) for monitoring a vehicle using a camera with illumination such as an LED (light emitting diode), the present inventors have found that there are the following problems.
The illuminated cameras that have been studied include their own CCD image sensors (individual imaging devices using charge-coupled devices, hereinafter simply referred to as CCD sensors) and CMOS image sensors (individual imaging devices using CMOS, hereinafter simply referred to as CMOS sensors). If the luminance level of the image sensor is less than a certain threshold value, the illumination is turned on autonomously. It responds sensitively in places where ambient light temporarily becomes dark, such as the difference in brightness under the shade of trees, and a response is made dull by setting a time constant so that the lighting does not repeatedly turn on and off.
In the lighting method described above, the ambient light changes and it takes several seconds to turn on. Therefore, when the vehicle enters the tunnel at a high speed, the lighting is not turned on for several seconds after entering. As a result, a dark image is captured for several seconds when entering the tunnel.
An object of the present disclosure is to provide a technique for controlling lighting so that a monitoring target can be normally monitored when entering a known dark area such as a tunnel.

The outline of a representative one of the present disclosure will be briefly described as follows.
In other words, the train monitoring system is mounted on a train and illuminates a camera that shoots the monitoring target area, illumination that projects light onto the monitoring target area, a travel distance acquisition unit that acquires travel distance information of the train, and lighting A position information holding unit that holds in advance position information to be performed, and a control unit that turns on the lighting based on the travel distance acquired by the travel distance acquisition unit and the information held by the position information storage unit.

According to the present disclosure, the illumination can be reliably turned on when entering a known dark area such as a tunnel, and the monitored area can be monitored normally.

It is a figure for demonstrating the structure of the train monitoring system which concerns on an Example. It is a figure for demonstrating the structure of the camera with LED which concerns on an Example. It is a figure for demonstrating the LED lighting control sequence of the train monitoring system which concerns on an Example. It is a figure for demonstrating the LED automatic lighting control sequence of the train monitoring system which concerns on an Example. It is a figure for demonstrating the route of the tunnel position information which the CCTV server of the train monitoring system which concerns on an Example has. It is a figure for demonstrating the tunnel position information which the CCTV server of the train monitoring system which concerns on an Example has. It is a section distance information table of the train monitoring system concerning an example. It is a functional block diagram of the CCTV server of the train monitoring system which concerns on an Example.

Hereinafter, embodiments and examples will be described with reference to the drawings. However, in the following description, the same components may be denoted by the same reference numerals and repeated description may be omitted.

The train monitoring system according to the embodiment is mounted on a train, and a camera (for example, a camera with LED 4a) that captures a monitoring target area (for example, a pantograph 2a) and illumination that projects light onto the monitoring target area (for example, LED 28), a travel distance acquisition unit (for example, operation information acquisition unit 10A) that acquires train travel distance information, and a position information holding unit (for example, a tunnel information table) that stores in advance information on the position for lighting the light. 10C), a control unit (for example, current position calculation unit 10D and LED lighting control unit 10E) that turns on the lighting based on the travel distance acquired by the travel distance acquisition unit and the information stored in the position information storage unit. Is provided.

The train monitoring system according to the embodiment further acquires stop station specifying information for specifying a stop station of the train (for example, information for specifying which operation pattern such as a starting station, an end station, and an operation type). A stop station specifying information acquisition unit (for example, a function that the operation information acquisition unit 10A acquires at the start of operation) is provided. The position information holding unit holds information on the positions of a plurality of patterns with different stopping stations. The control unit selects position information used for lighting control of the lighting based on the stop station specifying information.

The travel distance acquisition unit, the position information holding unit, the control unit, and the stop station identification information acquisition unit are preferably configured by a server (for example, the CCTV server 10).
For example, the server has tunnel position information as setting information, and performs lighting lighting control from the acquired distance information from the first station and information on the current station and the next stop station. In order to acquire information on the current station and the next stop station updated when the station stops, the server checks whether there is a tunnel in the travel section. If there is a tunnel in the travel section, the server calculates the distance to the tunnel from the information of the current station and the next stop station. The server turns on the light before entering the tunnel based on the distance information from the first station that is updated at any time during traveling, and turns off the light after exiting the tunnel.

It is also preferable that an external interface for lighting (for example, LED) lighting control is provided in the camera, and the server performs lighting lighting control from the tunnel position information. In addition, the camera can autonomously control lighting from the luminance information of the image, and it is preferable to perform lighting lighting control from the external interface with priority over autonomous LED lighting control.

According to the present embodiment, the illumination can be reliably turned on when entering a known dark area such as a tunnel, and the monitored area can always be monitored normally. In addition, by providing a time constant, it can be said that lighting is not turned on (does not react sensitively) in places where ambient light temporarily decreases, such as under a tree.

In the following, a CCTV system that monitors a pantograph using an LED-equipped camera as an example (example) of the embodiment will be described. However, the present invention is not limited to this, and a system that images a monitoring area that requires illumination with a camera. Can be applied to.

A configuration of the train monitoring system according to the embodiment will be described with reference to FIGS. 1 and 2.
The train monitoring system 100 according to the embodiment includes a head vehicle 1a, an intermediate vehicle 1b, and a tail vehicle 1c. The leading vehicle 1a is equipped with

pantographs

2a and 3a, and has a CCTV (Closed Circuit Television) system that monitors the behavior of the

pantographs

2a and 3a by the

cameras

4a and 5a with LEDs. The intermediate vehicle 1b has

pantographs

2b and 3b, and has a CCTV system that monitors the behavior of the

pantographs

2b and 3b by the cameras with

LEDs

4b and 5b. The last vehicle 1c is equipped with

pantographs

2c and 3c, and has a CCTV system that monitors the behavior of the

pantographs

2c and 3c by the cameras with

LEDs

4c and 5c.

These CCTV systems are systems connected via a network, and have a configuration in which

switching hubs

6, 7, and 8 are cascade-connected from the leading vehicle 1a to the trailing vehicle 1c. In the leading vehicle 1a, the switching hub 6 connects the upper system server 9 with the network cable 12, and the switching hub 7a connects the CCTV server (control device) 10, the LED-equipped camera 4a, and the monitor 11a with the network cable 12, respectively. The switching hub 8a connects the LED-equipped camera 5a with the network cable 12. In addition, the switching hub 7b of the intermediate vehicle 1b is connected to the switching hub 8a with a network cable 12, the camera with LED 4b is connected with the network cable 12, and the switching hub 8b is connected to the switching hub 7b with the network cable 12, and with an LED. The camera 5b is connected with the network cable 12. The switching hub 7c of the last vehicle 1c is connected to the switching hub 8b via the network cable 12, and the camera with LED 4c is connected with the network cable 12. The switching hub 8c is connected to the switching hub 7c with the network cable 12, and the camera with LED is connected. 5c and the monitor 11c are connected by the network cable 12, respectively.

These CCTV systems are controlled by the CCTV server 10, and the CCTV server 10 displays the images of the cameras with

LEDs

4a, 5a, 4b, 5b, 4c, and 5c on the

monitors

11a and 11c. Since the monitors 11a and 11b are respectively arranged on the leading vehicle 1a and the last vehicle 1c, both the driver and the crew such as the conductor can check the video.

The CCTV server 10 is connected to the host system server 9 and always receives the current station, the next stop station, the end station, the distance information from the first station, and the usage status of the pantograph. The host system server 9 is, for example, a device that manages train operation, and is, for example, TMS (Train Management System). The host system server 9 outputs the train operation information to the CCTV server 10 at a predetermined cycle (for example, every 100 ms). At the start of train operation, the upper system server 9 outputs at least the first station, the last station, the operation type (whether each station is a stop or limited express, etc.) to the CCTV server 10 as the train operation information. Further, during train operation, at least distance information and speed information from the starting station are output to the CCTV server 10 as operation information. Further, when the station is stopped, the upper system server 9 outputs at least information on the station being stopped and information on the next stop station to the CCTV server 10 as operation information.

The CCTV server 10 controls the entire monitoring system in the train, and performs display control and recording control as well as camera control. It is always recorded in association with the camera with LED that captured the video input by the recording control and the shooting time.

The train monitoring system 100 has been described as being configured with three vehicles, but is not limited thereto, and may be configured with only one vehicle or may be configured with four or more vehicles. . When the train monitoring system is configured by only one vehicle, the configuration is the same as that of the leading vehicle 1a. When the train monitoring system is composed of four or more vehicles, the train monitoring system is composed of a leading vehicle 1a, a trailing vehicle 1c, and a plurality of intermediate vehicles 1b. In the case of turning back at the terminal station, the last vehicle 1c becomes the leading vehicle and the leading vehicle 1a becomes the last vehicle.

Since the cameras with

LED

4a, 5a, 4b, 5b, 4c, and 5c have the same configuration, the camera with LED 4a will be described below as a representative. As shown in FIG. 2, the LED-equipped camera 4 a uses the signal processing unit 21 to image the data output from the CCD / CMOS sensor 20. This image is converted into JPEG / H. It is compressed by a method such as H.264. The compressed image is transmitted to the video display device such as the monitor 11 via the interface 24 by a network protocol such as HTML in the image transmission unit 23. The CCTV server 10 determines whether the LED is turned on or off based on the distance information from the first station notified from the host server 9 and the tunnel position information held by itself, and transmits an LED lighting control command to the LED-equipped camera 4a. The LED lighting control command is received by the LED lighting control command receiving unit 27 via the interface 24 of the camera with LED 4a. The LED automatic lighting control unit 26 of the camera with LED 4a inputs the luminance level of the luminance level acquisition unit 25, and the camera autonomously performs control in the sequence of FIG. This luminance level indicates the average luminance level of all the pixels of the image obtained from the latest image, and is set to an average luminance level at a certain time interval in order to reduce the influence of light and dark differences such as under a shade. The LED lighting control unit 29 of the camera with LED 4a performs the lighting control of the LED 28 by using the LED lighting control commands of the LED automatic lighting control unit 26 and the LED lighting control command receiving unit 27 as inputs.

The LED lighting control sequence of the train monitoring system according to the embodiment will be described with reference to FIG. First, in step S41, the CCTV server 10 determines whether or not the pantograph is unused, and prevents the LED from being turned on unnecessarily. If the pantograph is not used, the process proceeds to step S47. If the pantograph is not used, the process proceeds to step S42. In step S42, the CCTV server 10 determines whether or not the train is stopped at the station. If the train is not stopped at the station, the process proceeds to step 43. If the train is stopped at the station, the process proceeds to step S48. In step S43, the CCTV server 10 determines whether there is a tunnel between the previous stop station and the next station based on the tunnel information table of FIG. If there is a tunnel between the previous station and the next station, the process proceeds to step S44. If there is no tunnel between the previous station and the next station, the process proceeds to step S48. In step S44, the CCTV server 10 determines whether or not the current train position is X meters before the tunnel. The X meter before the tunnel (for example, several hundred meters) indicates the lighting position of the LED set in the CCTV server 10 and is set as the X meter from the tunnel entrance. If the current train position is X meters before the tunnel, the process proceeds to step S45. If the current train position is not X meters before the tunnel, the process proceeds to step S46. In step S45, the LED lighting command is transmitted from the CCTV server 10 to the camera with LED 4a. In step S46, the CCTV server 10 determines whether or not the current train position is Y meters after the tunnel. The Y meter after the tunnel (for example, several hundred meters) indicates the LED extinguishing position set in the CCTV server 10 and is set as Y meter from the tunnel exit. If the current train position is Y meters after the tunnel, the process proceeds to step S47. If the current train position is not Y meters after the tunnel, the process proceeds to step S48. In step S47, an LED turn-off command is transmitted from the CCTV server 10 to the camera with LED 4a. In step S48, automatic lighting control autonomously performed by the camera with LED is performed.

The automatic LED lighting control (step S48) autonomously performed by the camera with LED will be described with reference to FIG.
In step S50, the luminance level acquisition is acquired. The luminance level is acquired by the luminance level acquisition circuit 25 of the camera with LED 4a. In step S51, the LED automatic lighting control unit 26 of the camera with LED 4a determines whether the LED is currently lit. If the LED is currently lit, the process proceeds to step S52. If the LED is not currently lit (turned off), the process proceeds to step S54. In step S52, the LED automatic lighting control unit 26 of the camera with LED 4a determines whether or not the luminance level exceeds the threshold value A. If the luminance level exceeds the threshold A, the process proceeds to step S53, and if the luminance level does not exceed the threshold A, the process proceeds to step S54. In step S53, LED turn-off control is performed. In step S54, the LED automatic lighting control unit 26 of the camera with LED 4a determines whether or not the luminance level is below the threshold value B. If the luminance level is below the threshold B, the process proceeds to step S55, and if the luminance level is not below the threshold B, the process proceeds to step S50. In step S55, LED lighting control is performed. The relationship between the thresholds A and B is A> B, and the thresholds A and B give hysteresis to the LED lighting control.

The case where the LED lighting control is performed by the CCTV server will be described with reference to FIGS.
The route shown in FIG. 5 is a route from station A to station E (down), station E to station A (up), station A to station I (down), and station I to station A (up). Tunnels exist between B and C stations, D and E stations, and C and H stations. There are two tunnels between the B station and the C station, which are located at positions X1 [m] and X2 [m] from the B station and Y1 [m] and Y2 [m] from the C station. The two tunnels between the B station and the C station are located at positions X5 [m] and X6 [m] from the A station. The tunnel between D station and E station is located at X3 [m] from D station. Note that the tunnel between D station and E station is located at X7 [m] from C station. In addition, there is no tunnel on the upward route from E station to D station. The tunnel between the C station and the H station is located at X4 [m] from the C station and Y3 [m] from the H station.

The CCTV server 10 holds a route tunnel information table shown in FIG. As shown in FIG. 6, the tunnel information table includes a departure station (stop) for each operation pattern (No. in FIG. 6) such as a down / up direction, a start station, an end station, a stop type of each station, an operation type such as a limited express, etc. Information on the presence or absence of a tunnel between the middle station) and the next stop station, the number of tunnels, the distance to the tunnel entrance, and the distance to the tunnel exit. In the tunnel information table of FIG. 6, the operation pattern for the uplink express is omitted. The operation pattern No. in FIG. As shown in FIGS. 3 and 4, since the limited express does not stop at the B station, the distance from the A station that stops before the B station is held in the tunnel information table. The operation pattern No. in FIG. As shown in FIG. 3, since the limited express does not stop at the D station, the distance from the C station that stops in front of the D station is held in the tunnel information table. The number of tunnels is used to confirm whether the LED lighting control unit 10E of the CCTV server 10 is equipped with a counter and can definitely control the lighting. As shown in FIG. 6, the car operates in various sections at each station stop or on a limited express. Instead of registering the tunnel location information (FIG. 6) in the CCTV server 10 each time, by registering all the patterns assumed in advance in the CCTV server 10, it is possible to greatly reduce the labor during operation. Can do. When the station stops, information on the current stop station and the next stop station of the CCTV server 10 is updated with information provided from the higher-level server 9.

Further, the CCTV server 10 holds the station section distance information shown in FIG. 7, and holds the section distance of each station and the section distance of each station from the starting station. For example, if the section from station A to station B is 10 km and the current position of the train (travel distance from the first station A station) is 12.9 km, the train is between station B and station C. It is 2.9km (= 12.9km-10km) ahead. Here, if X1 = 3000 m and the setting value of the CCTV server is X = 100 m, the CCTV server 10 transmits an LED lighting control command to the LED-equipped camera 4a to light the LED. When the current position of the train is 14.1 km, the train is between B station and C station, and is located 4.1 km (= 14.1 km-10 km) from B station. Here, if X1 ′ = 40000 m and the setting value of the CCTV server is Y = 100 m, the LED extinguishing position is 4.1 km (= 4000 m + 100 m), and the CCTV server 10 transmits an LED lighting control command to the camera with LED 4a. Then turn off the LED.

A functional configuration related to LED lighting control of the CCTV server 10 will be described with reference to FIG. As shown in FIG. 8, the CCTV server 10 includes an operation information acquisition unit 10A that acquires operation information from the host system server 9, a holding unit 10B for station section distance information (FIG. 7), and a tunnel information table (FIG. 6). 10C, based on the travel distance from the first station acquired from the operation information acquisition unit 10A and the station section distance information, the travel distance from the departure station in FIG. 7 (that is, the tunnel entrance and exit in FIG. 6). A current position calculation unit 10D that calculates a distance), and an LED lighting control unit 10E that performs LED lighting control based on the current position calculated by the current position calculation unit 10D and the tunnel information table. The operation information acquired by the operation information acquisition unit 10A from the upper system server 9 includes train distance information and stop station specifying information for specifying a stop station of the train.

The train monitoring system 100 holds all the operation patterns in the predetermined section as shown in FIG. 6, and the operation information acquisition unit 10A of the CCTV server 10 determines from the upper system server 9 when the train operation starts (before). Information (stop station identification information) for determining the operation pattern (which No. information in FIG. 6) is acquired, and the operation pattern from the table in FIG. 6 is selected and used for lighting control. .

For example, when a train moving at high speed is traveling at a speed of 200 km / h, the speed is 55 m / s. Accordingly, if the light does not light for a few seconds when entering the tunnel, the light is not lighted for about 100 to 200 meters in the tunnel, and the monitoring target cannot be normally monitored during that time. Even if it is configured to turn on the illumination immediately when the detection result of the sensor falls below a predetermined darkness without providing the above time constant related to lighting, the processing time between them is necessary, so darkness such as in a tunnel is required. There is a possibility that normal monitoring cannot be performed because the lighting is not turned on for a predetermined distance after entering in a certain area. However, in the present embodiment, since the illumination can be turned on before entering the dark area, the above problem can be avoided.

As mentioned above, although the invention made by the present inventor has been specifically described based on the embodiments and examples, the present invention is not limited to the above-described embodiments and examples, and various modifications can be made. Needless to say.

For example, in the above-described embodiment, the tunnel information table holds the distance between the tunnel entrance and the exit from the departure station (stopped station), and controls the LED lighting based on the total travel distance from the starting station and the like. . However, the tunnel information table may hold the distance for turning on / off the LED based on the travel distance from the starting station, and control the LED.

In addition, the station section distance information of FIG. 7 is not used, the total travel distance to the station (distance from the A station of the starting station) is stored when the station stops, and the total travel distance stored during the travel is stored at the station stop time. By subtracting the travel distance, the travel distance from the departure station is counted (calculated) from 0, and the LED control may be performed in comparison with the distance to the tunnel (X1 etc.) in FIG. The travel distance information as operation information from the host system server 9 is calculated from information such as wheel rotation and GPS, and an error may occur with the actual travel distance. Therefore, if the travel distance from the departure station is calculated by the above method, the error before the departure station can be removed, and the travel distance can be measured more accurately. As a result, it is possible to more accurately execute LED lighting control and thus monitoring.

Furthermore, in the above-described embodiment, the CCTV server 10 also controls the LED turn-off control based on operation information and various tables (FIGS. 6 and 7). However, such control may be only lighting control, and the LED turning-off control may be performed by the control of the LED automatic lighting control circuit 26 based on the signal from the CCD / CMOS sensor 20. This also ensures lighting before the tunnel.

1a, 1b, 1c ...

Vehicles

2a, 2b, 2c, 3a, 3b, 3c ...

Pantographs

4a, 4b, 4c, 5a, 5b, 5c ... Cameras with

LEDs

6, 7, 8 ... Switching Hub (Switching HUB)
9 ... Host server 10 ...

CCTV servers

11a, 11c ... Monitor 12 ... Network cable 20 ... CCD / CMO sensor (imaging device)
21 ... Signal processing unit 22 ... Image compression unit 23 ... Image transmission unit 24 ... Interface 25 ... Brightness level acquisition unit 26 ... LED automatic lighting control unit 27 ... LED lighting control Command receiver 28 ... LED
29 ... LED lighting control part

Claims

A camera that is mounted on the train and shoots the monitored area;
Illumination for projecting light on the monitored area;
A travel distance acquisition unit for acquiring train travel distance information;
A position information holding unit for holding in advance information on a position for turning on the illumination;
Based on the travel distance acquired by the travel distance acquisition unit and the information held by the position information holding unit, a control unit that turns on the illumination,
A train monitoring system.
In claim 1,
A stop station specifying information acquisition unit for acquiring stop station specifying information for specifying a stop station of a train,
The position information holding unit holds information on the position of a plurality of patterns with different stopping stations,
The said control part is a train monitoring system which selects the information of the said position used in order to carry out lighting control of the said illumination based on the said stop station specific information.
In claim 2,
The train monitoring system, wherein the position information for turning on the lighting is tunnel position information, and the stop station specifying information is information for specifying an operation pattern including a start station, an end station, and an operation type.
In claim 1,
The monitoring symmetric area is a train monitoring system which is a pantograph mounted on a vehicle.
In claim 1,
The camera and the illumination are configured with a camera with LED,
The travel distance acquisition unit, the position information holding unit, and the control unit are configured by a server,
A train monitoring system configured to connect the camera with LED and the server via a network.
In claim 5,
The LED camera
An image sensor;
LED,
An automatic lighting control unit that autonomously controls lighting / extinguishing of the LED based on luminance information from the imaging element;
A lighting control receiving unit for receiving information for controlling lighting / extinguishing of the LED from the server;
With
When receiving information for controlling lighting / extinction of the LED from the server, the train monitoring system is configured to turn on / off the LED with priority given to the output of the lighting control receiving unit.