JP2021002835A - Monitoring system and monitoring method - Google Patents

Abstract

To provide a system in which crews can quickly and adequately recognize the movement of passengers, and also to provide a camera arrangement with less blind spot.SOLUTION: Each of vehicles 111-116 has two front and rear doors 121, 122 or 123, 124 and two cameras 131, 132 or 133, 134 arranged towards directions different from each other between the two doors 121, 122 or 123, 124, on respective both sides of a vehicle body. A monitoring system 100 divides the display area of each of monitors 141-142 into a plurality of areas, and controls such that a plurality of camera videos captured by the cameras 131, 132 or 133, 134 of each vehicle are assigned to respective areas to be displayed. The assignment of the camera videos for each area is controlled on the basis of information indicating the direction of travel of a train and information indicating a side where the doors open.SELECTED DRAWING: Figure 5

Description

The present invention relates to a train system, and more particularly to a monitoring system and a monitoring method that assist a driver or a crew member to efficiently confirm the movement of passengers around a train door.

In the train system, a driver or a crew member (hereinafter, simply referred to as a "crew member") checks the safety of passengers by visually checking passengers moving on the platform, and controls the opening and closing of doors. Passenger footage is captured by cameras installed on the vehicle body or on the platform. For example, in Japan, a system that uses a camera installed on a platform to display an image on a monitor of the platform or a monitor of a train cab is common. On the other hand, in the United Kingdom, for example, a system that displays an image on a monitor in the driver's cab by using a camera installed on the side surface of the vehicle body is common. These differences are due to the difference in whether train operations and infrastructure are managed by the same or different operators.
In the following, an in-vehicle camera type surveillance system in which a camera is installed in the vehicle body will be referred to. For example, Patent Document 1 discloses a monitoring system in which cameras are arranged adjacent to each door of a vehicle.

International Publication No. 2015/145736

In train monitoring systems, real-time performance is required to monitor passenger safety, so analog systems that do not cause delays have been used with priority. However, in recent years, advances in IP technology have made low-delay transmission possible, and all devices have come to be connected to IP networks. One advantage of the IP system is that IP technology allows devices to be connected with a single cable, reducing cable costs. Moreover, not only video data but also other information such as alarm information and train information can be transmitted with a single cable. Images taken by a plurality of cameras are encoded by each camera, transmitted to a monitor via an IP network, decoded by the monitor, and displayed separately.

FIG. 1 shows a configuration example of a conventional in-vehicle camera type monitoring system 500. The monitoring system 500 is applied to a train composed of 6 cars of vehicles 511 to 516. Two cameras 531 and 532 and a switching hub 535 are installed in each of the vehicles 511 to 516. Further, the first and sixth vehicles 511 and 516 have a driver's cab, and a monitor 541 is installed in the driver's cab. The switching hub 535 of each vehicle is connected to the cameras 531, 532 and the monitor 541 of the vehicle and the switching hub 535 of the adjacent vehicle.

FIG. 2 shows an example of camera arrangement in the surveillance system 500. In each vehicle VS1 to VS6, two front and rear doors 521 and 522 and a camera 531 are arranged on one side surface, and two front and rear doors 523 and 524 and a camera 532 are arranged on the other side surface. That is, one camera 531 or 532 covers the entire monitoring area VA on one side of one vehicle.

FIG. 3 shows how one monitor 541 capable of displaying 6 divisions simultaneously monitors up to 6 camera images. In this example, all camera images are shown as similar images as possible.
With respect to such split display, camera assignment can be achieved in a very simple way. FIG. 4 shows an example of camera allocation in the 6-division display. The display area of the monitor 541 is divided into six areas, and serial numbers "1" to "6" are assigned as display numbers for identifying each area in the order from the upper left to the lower right. Then, camera images are arranged in each area in the order of VS numbers that identify each vehicle. The VS numbers are assigned in the order of vehicles heading from the beginning to the rear in the traveling direction, for example.

A potential problem with conventional surveillance systems as described above is how the crew can instantly recognize the movement of passengers from many camera images and safely control the door.
For example, in the camera arrangement shown in FIG. 2, it becomes difficult for the crew to recognize passengers near the distant door depending on the length of the vehicle and the position of the door. That is, when two doors are provided at both ends of the vehicle apart from each other, it is difficult for the crew to recognize the movement of the passenger because the display size of the passenger is small in the vicinity of the door far from the camera. As a countermeasure for this, as in Patent Document 1, a configuration in which a camera is provided for each door can be considered. However, for example, in the case of a 12-car train, the number of camera images to be monitored by the crew is as large as 24, which is a heavy burden on the crew. Therefore, it is necessary to devise a method of displaying the camera image so that the crew can recognize the movement of the passenger quickly and accurately.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a mechanism that allows a crew member to quickly and accurately recognize the movement of a passenger.

In order to achieve the above object, the monitoring system and the monitoring method according to the present invention are configured as follows.
(1) In the monitoring system mounted on the train, a camera for capturing at least the vicinity of the door of the vehicle forming the train and a monitor for displaying the camera image taken by the camera are provided on both sides of the vehicle. A display control unit in which the camera is arranged with respect to the door, the display area of the monitor is divided into a plurality of areas, and a plurality of camera images taken by the cameras of each vehicle are assigned to each area and displayed. The display control unit is characterized in that it controls the allocation of the camera image to each area based on the information indicating the traveling direction of the train and the information indicating the side on which the door opens.

(2) The monitoring system according to (1) above is characterized in that a plurality of the cameras are arranged so as to face each other on both sides of the vehicle.

(3) The monitoring system according to (1) above is characterized in that a plurality of the cameras are arranged on both sides of the vehicle so as to face the same direction.

According to the present invention, the crew member can quickly and accurately recognize the movement of the passenger.

It is a figure which shows the configuration example of the conventional monitoring system. It is a figure which shows the example of the camera arrangement in the conventional surveillance system. It is a figure which shows the example of the divided display in the conventional monitoring system. It is a figure which shows the example of the camera allocation of the split display in a conventional surveillance system. It is a figure which shows the structural example of the monitoring system which concerns on one Embodiment of this invention. It is a figure which shows the example of the camera arrangement in the monitoring system of FIG. It is a front view of the DOO camera used in the monitoring system of FIG. It is a side view of the DOO camera used in the monitoring system of FIG. It is a figure which shows the example of the camera image taken by the DOO camera. It is a figure which shows the example of the operation flow in the monitoring system of FIG. It is a figure which shows the example of the camera allocation of the divided display in the monitoring system of FIG. It is a figure which shows the processing flow of the 1st display method which concerns on the divided display by the monitoring system of FIG. It is a figure which shows the example of the split display on the right door side by the 1st display method. It is a figure which shows the example of the split display on the left door side by the 1st display method. It is a figure which shows the processing flow of the 2nd display system which concerns on the divided display by the monitoring system of FIG. It is a figure which shows the example of the split display on the right door side by the 2nd display method. It is a figure which shows the example of the split display on the left door side by the 2nd display method. It is a figure which shows the traveling direction of a train on the screen on the right door side by the 2nd display system. It is a figure which shows the traveling direction of a train on the screen on the left door side by the 2nd display system. It is a figure which shows the processing flow of the 3rd display method which concerns on the divided display by the monitoring system of FIG. It is a figure which shows the example of the split display on the right door side by the 3rd display method. It is a figure which shows the example of the split display on the left door side by the 3rd display method. It is a figure which shows the traveling direction of a train on the screen on the right door side by the 3rd display system. It is a figure which shows the traveling direction of a train on the screen on the left door side by the 3rd display system. It is a figure which shows another division example of the display area of a monitor. It is a figure which shows the further division example of the display area of a monitor. It is a figure which shows another example of the camera arrangement in the surveillance system of FIG. It is a figure which shows the example which arranged 4 doors and 4 cameras on each side of a vehicle.

The present invention relates to a surveillance system in which a camera that images at least the vicinity of a door of a vehicle forming a train and a monitor that displays a camera image taken by the camera are mounted on the train. The monitoring system according to the present invention has a configuration in which cameras are arranged for each of a plurality of doors provided on both sides of the vehicle, and the display area of the monitor is divided into a plurality of areas by the cameras of each vehicle. It is provided with a display control unit that controls to assign and display a plurality of captured camera images to each area. The display control unit controls the allocation of the camera image to each area based on the information indicating the traveling direction of the train and the information indicating the side where the door opens.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 5 is a diagram showing a configuration example of a monitoring system according to an embodiment of the present invention. The monitoring system 100 of FIG. 5 is mounted on a train composed of 6 cars of vehicles 111 to 116. When the train travels to the left in the drawing, the first car 111 shown at the left end is the first car, and the sixth car 116 shown at the right end is the last car. On the contrary, when the train travels toward the right side of the drawing, the sixth car 116 shown at the right end is the first car, and the first car 111 shown at the left end is the last car.

The monitoring system 100 includes cameras 131 to 134, a switching hub 135, monitors 141 to 142, a server 151, a recording device 152, and a host server 153. These devices are connected using a network cable. Further, a power supply cable is connected to these devices, and power is supplied from a power supply unit (not shown) of each vehicle.

Four cameras 131-134 and a switching hub 135 are installed in each of the vehicles 111-116. Further, the first vehicle 111 and the sixth vehicle 116 have a driver's cab, and two monitors 141 to 142 are installed in the driver's cab. The cameras 131 to 134 and the monitors 141 to 142 of each vehicle are connected to the switching hub 135 of the vehicle by a network cable. Further, a server 151, a recording device 152, and an upper server 153 are installed in the first vehicle 111. The server 151 and the recording device 152 are connected to the switching hub 135 with a network cable, and the upper server 153 is connected to the server 151 with a network cable. In addition, the server 151 and the upper server 153 may be provided in the sixth vehicle 116 as well as the first vehicle 111, and these devices may be multiplexed.

Further, the switching hub 135 of each vehicle is connected to the switching hub 135 of the adjacent vehicle by a network cable. In this way, by connecting the switching hubs 135 mounted on the adjacent cars, one network is formed in the train. These network cables are connected to the jumpsuit boxes (not shown) via, for example, under the floor of the vehicle, and between the vehicles, the jumpsuit boxes of adjacent vehicles are connected by jumper wires.

The upper server 153 is, for example, a device that manages train operation. As the upper server 153, TMS (Train Management System) is used as an example. The upper server 153 outputs train operation information to the server 151 at a predetermined cycle while the train is in operation. Train operation information includes train speed information, boarding / alighting door opening / closing information (information on whether the boarding / alighting door is open or closed), and boarding / alighting gate information on the platform of the next station or the station currently stopped (information on whether the door is open or closed). For example, information on whether the left door is the entrance / exit or the right door is the entrance / exit), the number of vehicles, train traveling direction information, and the like are included.

The crew rides on the leading vehicle (for example, the first vehicle 111) in the direction of travel of the train, and operates the train (driving, opening / closing the door, etc.) by itself.
All cameras 131 to 134 capture images within a predetermined field of view (angle of view) at a predetermined imaging frame rate. In addition, the cameras 131 to 134 capture the captured image (live image) by H.I. It is compressed in a format such as 264 / MPEG4 / JPEG and transmitted to the recording device 152 and monitors 141 to 142 via the switching hub 135 and the network cable.

The recording device 152 constantly records the input camera image in association with the camera that captured the image and the imaging time.
The monitors 141 to 142 divide and display the live video of all the cameras 131 to 134 or the recorded video recorded on the recording device 152 by performing video processing such as cutting and inverting according to the instruction of the server 151. The recorded video is mainly used as analysis material and evidence video in the event of an accident or crime. Further, the main settings of the server 151, the monitors 141-142, the cameras 131-134, and the recording device 152 are set in advance by the operator when the system operation is started. Here, in the present embodiment, the monitors 141 to 142 have a display control unit for controlling the divided display, but the server 151 may be provided with the display control unit. That is, the server 151 may generate video data for split display, transmit it to the monitor, and display it on the monitor.

The cameras 131 to 134 automatically transmit video to the recording device 152 and the monitors 141 to 142 at a predetermined frame rate. Alternatively, the cameras 131 to 134 transmit the video to the recording device 152 and the monitors 141 to 142 at a predetermined frame rate in response to the transmission request transmitted from the monitors 141 to 142 via the switching hub 135.
It should be noted that the operator can set in advance whether the cameras 131 to 134 transmit the video automatically or the video is transmitted in response to the transmission request from the monitors 141 to 142 at the start of system operation. .. It is also possible for the crew to operate the server 151 to switch.

The crew can check the images captured by the cameras 131 to 134 on the monitors 141 to 142 in the vehicle leading in the traveling direction of the train. That is, when the train travels to the left of the drawing, the camera image can be confirmed on the monitors 141 to 142 of the first vehicle 111, and when the train travels to the right of the drawing, the camera image can be confirmed. The camera image can be confirmed on the monitors 141 to 142 of the sixth vehicle 116.

The two monitors 141-142 in the leading vehicle are preferably arranged vertically or horizontally so that the crew can view both monitors 141-142 at the same time. The monitor of this embodiment is divided into 12 in total by dividing the display area into two vertically and six horizontally. Therefore, one monitor can simultaneously display camera images of a 6-car train (a total of 12 camera images on one side of the train). In addition, by using two monitors together, it is possible to simultaneously display camera images of trains of up to 12 cars.

FIG. 6 shows an example of camera arrangement in the monitoring system 100 of FIG. Each vehicle has two doors 121, 122 and two cameras 131, 132 arranged on one side, and two doors 123, 124 and two cameras 133, 134 on the other side. Is placed. That is, the monitoring areas (VA1, VA2) on one side of one vehicle are covered by two cameras 131, 132 or 133, 134. As the cameras 131 to 134, a DOO (Driver Only Operation) camera, which is a kind of IP camera, is used as an example. As described above, in this example, the cameras are individually arranged for each of the plurality of doors provided on both sides of the vehicle.

Here, if the platform is curved, a large gap may occur between the vehicle and the platform. If the platform is curved with respect to the train, a gap will occur in area GA1 (see FIG. 2) between the cars. Further, when the platform is curved in a concave shape with respect to the train, a gap is generated in the area GA2 (see FIG. 2) in the middle part of the vehicle (between the two front and rear doors). Crew members should also monitor the movement of passengers near the gap to prevent passenger accidents due to such gaps. However, in the conventional camera arrangement as shown in FIG. 2, the area GA2 between vehicles is too far from the camera and becomes a blind spot, and even if there is a gap there, it is extremely difficult to monitor. Therefore, it is necessary to devise a camera arrangement so that the blind spot can be reduced as much as possible.

In this embodiment, the camera arrangement is devised so that the vicinity of the door, the platform, and the gap between the vehicle and the platform can be photographed. Specifically, as shown in FIG. 6, two cameras are arranged in different directions between the two front and rear doors on both sides of each vehicle. Further, each camera is arranged between the door and the center of the vehicle toward the center side of the vehicle. That is, a camera attached to the vehicle body toward the rear door side monitors the monitoring area VA1 behind the camera. In addition, a camera attached to the vehicle body facing the front door side monitors the monitoring area VA2 in front of the camera.

With such a camera arrangement, it is possible to provide a camera arrangement with few blind spots. That is, it is possible to photograph not only the vicinity of the door of each vehicle but also the area GA1 between the vehicles, and the gap generated in the area GA1 can be monitored. Further, as shown in FIG. 6, by arranging these two cameras so as to face each other, the area GA2 in the middle portion of the vehicle can be photographed, and the gap generated in the area GA2 can be monitored. In order to sufficiently photograph the area GA2 in the middle portion of the vehicle, it is preferable to provide these two cameras at a certain distance from each other.

As shown in FIG. 6, the four cameras 131 to 134 provided in each vehicle are assigned the camera numbers D1 to D4 clockwise. This camera number is information that identifies the position of the camera with respect to each vehicle, and is set to be the same for all vehicles. Specifically, in the first to third vehicles, the camera numbers D1 to D4 are assigned clockwise from the upper left of the drawing, which is the front right side when the first vehicle is the leading vehicle. In the case of the 4th to 6th cars, which are connected by inverting the front and back of the 1st to 3rd cars, the clock starts from the lower right of the drawing, which is the front right side when the 6th car is the leading car. Camera numbers D1 to D4 are assigned around it.

Here, when monitoring is performed using a DOO camera, there is a problem of image inversion. 7A and 7B show a front view and a side view of the DOO camera. The DOO camera 220 has a lens 221 for imaging, and is attached to the outer wall 210 of the vehicle body with the lens 221 facing the door side to be photographed. The DOO camera 220 has a flat shape to reduce collisions between air resistance and gravel, and has only one mounting surface with respect to the vehicle body outer wall 210.

Therefore, in order to arrange the two DOO cameras in different directions, it is necessary to rotate one DOO camera by 180 degrees. That is, the D2 DOO camera facing the D1 DOO camera is rotated 180 degrees with respect to the D1 DOO camera and attached to the vehicle body in an upside-down posture. Similarly, the D4 DOO camera facing the D3 DOO camera is rotated 180 degrees with respect to the D3 DOO camera and attached to the vehicle body in an inverted position. Therefore, as shown in FIG. 8 as an example of the camera image, the camera images taken by the DOO cameras of D1 and D3 are vertically aligned, but the camera images taken by the DOO cameras of D2 and D4 are inverted. In this way, the camera image is inverted depending on the shooting direction and the mounting position of the DOO camera. Therefore, the camera images taken by the DOO cameras of camera numbers D2 and D4 need to be turned upside down.

Next, the operation of the monitoring system 100 of this embodiment will be described with reference to the operation flow shown in FIG. The cameras 131 to 134 of each vehicle can control the start and stop of video distribution via the network. Further, the monitors 141 to 142 acquire and store the information of the image cutout frame of each camera and the control information of the divided display from the server 151 at the start of the train operation, and control the divided display based on the information. To do. The divided display control information includes information on the divided format of the display area of the monitor, information on the display number that identifies each divided area, and the like.

The server 151 determines whether or not the train has stopped at the station based on the train speed information in the above-mentioned operation information received from the upper server 153 (step S11). For example, by determining whether the speed of the train is equal to or higher than the predetermined speed or lower than the predetermined speed, it is possible to determine whether or not the train has stopped at the station. As the predetermined speed, for example, 3 km / h can be used, but the speed is not limited to this, and any speed that can determine whether or not the train is stopped may be used.
When the server 151 determines in step S11 that the train is stopped at the station, the server 151 determines whether or not the vehicle door is open based on the boarding / alighting door opening / closing information in the operation information (step S12). ).

When the server 151 determines in step S12 that the door of the vehicle is open, the server 151 transmits a command to start displaying an image to the monitors 141 to 142 (step S13). At this time, the server 151 simultaneously or continuously transmits the boarding / alighting gate information (and train traveling direction information) in the operation information to the monitors 141 to 142.
The monitors 141 to 142 divide and display the camera images captured by the plurality of cameras in response to receiving the command to start the image display from the server 151 (step S14). The details of the split display will be described later. After that, the process returns to step S11 and the process is repeated.

Further, when the server 151 determines in step S11 that the train has not stopped at the station, or when it determines in step S12 that the vehicle door is not open, the image display is stopped on the monitors 141 to 142. The command is transmitted (step S15). If the video display has not started, nothing needs to be done. After that, the process returns to step S11 and the process is repeated.

Here, the monitoring system 100 of the present embodiment considers the arrangement of each camera image on the monitor and performs the divided display in such a manner that the crew can easily recognize the monitoring area corresponding to each camera image. As an example, the camera images are arranged on the monitor by the logic of allocating the camera images in the order from the front to the rear in the traveling direction from the upper left to the lower right of the monitor.

The specific processing of the divided display in step S14 will be described below. In the following, a case where the display area of the monitor 141 is divided into 12 and a camera image of a 6-car train is displayed will be described as an example. The three types of the first display method, the second display method, and the third display method will be described, but the present invention is not limited to this, and the divided display may be performed by another display method.
Here, as shown in FIG. 6, it is assumed that serial numbers "1" to "6" are assigned as VS numbers for identifying each of the vehicles 111 to 116. For example, "VS1" indicates the first vehicle 111, and "VS6" indicates the sixth vehicle 116. Further, as described above, camera numbers D1 to D4 set to be the same for all vehicles are attached as information for identifying the position of the camera with respect to each vehicle. Further, as shown in FIG. 10, as display numbers for identifying each area in which the display area of the monitor 141 is divided into 12, the serial numbers "1" to "12" are in the order from the upper left area to the lower right area. It shall be attached.

(First display method)
FIG. 11 shows a processing flow of the first display method related to the divided display by the monitoring system 100.
The display control unit of the monitor inputs information on the traveling direction of the train and the side where the door opens (step S21). In this example, the contact information of the train is used as the information of the traveling direction of the train, but the train traveling direction information transmitted from the server may be used. The contact information is a signal that turns ON in the vehicle that is the first in the traveling direction and turns OFF in the vehicle that is the last in the traveling direction. From this contact information, the VS number (VS1 or VS6) of the vehicle that is the head in the traveling direction can be obtained. Further, in this example, the entrance / exit information transmitted from the server is used as the information on the side where the door opens.

Next, the display control unit of the monitor inputs the identification information of each camera to be divided and displayed and the camera image transmitted from the camera (step S22). In this example, the VS number (VS1 to VS6) and the camera number (D1 to D4) are used in combination as the camera identification information. The camera to be divided and displayed can be determined from the information on the direction of travel of the train and the side on which the door opens. Further, the display control unit of the monitor cuts out the camera image according to the information of the image cutting frame set in advance for each camera.

Next, the display control unit of the monitor determines whether the door opening side is the right side or the left side based on the information on the door opening side (step S23). The value set in the variable A provided for each camera differs depending on the determination result. That is, when it is determined in step S23 that the door on the right side opens, the variable A for the cameras of D1 and D3 is set to "2", and the variable A for the cameras of D2 and D4 is set to "1". Set (step S24). On the other hand, when it is determined in step S23 that the left door opens, the variable A for the cameras D1 and D3 is set to "1", and the variable A for the cameras D2 and D4 is set to "2". Set (step S25).

Next, the display control unit of the monitor determines whether the traveling direction of the train is the VS1 side (first car direction) or the VS6 side (sixth car direction) (step S27). The calculation formula of the display number DN to which each camera is assigned differs depending on the determination result. That is, when it is determined in step S27 that the traveling direction of the train is on the VS1 side, the display number DN is calculated using the following (Equation 1) (step S28). On the other hand, when it is determined in step S27 that the traveling direction of the train is on the VS1 side, the display number DN is calculated using the following (Equation 2) (step S29). Here, in the following (Equation 1) and (Equation 2), n is a VS number.
DN = 2 (n-1) + A ... (Equation 1)
DN = 2 (6-n) + A ... (Equation 2)

Next, the display control unit of the monitor performs an upside-down inversion process on the camera images of D2 and D4 mounted on the vehicle upside down (step S30).
Next, the display control unit of the monitor calculated each camera image on the side where the door opens (the camera image of D1 and D3 remains as it is, and the camera image of D2 and D4 is turned upside down) based on the identification information of the camera. Allocate to the area corresponding to the display number DN (step S31).
As described above, the display number for identifying each area of the display area of the monitor, the VS number for identifying each vehicle, and the camera number for identifying the position of the camera in the vehicle, which are set to be the same for all vehicles, are used. Based on this, the area to which the camera image is assigned is determined.

With the above first display method, all the camera images on the right door side or the left door side of the 6-car train are displayed in 12 divisions on one monitor. FIG. 12A shows an example of a screen on the right door side according to the first display method. Further, FIG. 12B shows an example of a screen on the left door side according to the first display method. As shown in FIGS. 12A and 12B, camera images from the two cameras of each vehicle are assigned to two adjacent areas. That is, the camera image is displayed as a set for each vehicle.

Further, the camera images in the vehicle order from the beginning to the rear in the traveling direction are assigned so as to be arranged in the order from the upper left area of the monitor to the lower right area. In this embodiment, the camera images are arranged in the same order as the doors in the train, but the camera images may be arranged in the same order as the cameras in the train. As a result, the camera images are divided and displayed in the same order as the actual vehicle doors or the arrangement of the cameras, so that the crew can easily recognize the movements of passengers in all areas to be monitored.
Further, in the upper right portion of each camera image in the divided display, identification information (combination of VS number and camera number) of the camera that captured the image is displayed. Therefore, the crew can recognize which camera was used to capture each image by looking at this display.

Here, according to the first display method, the camera images taken by the two cameras of the same vehicle have different appearances on the screen on the right door side and the screen on the left door side. For example, on the screen on the right door side, camera images taken by two cameras of the same vehicle are displayed in such a manner that the vehicle bodies are separated from each other (see FIG. 12A). On the other hand, on the screen on the left door side, camera images taken by two cameras of the same vehicle are displayed in such a manner that the vehicle bodies are adjacent to each other back to back between the images (see FIG. 12B). That is, the display position of the vehicle body in the two camera images of the same vehicle is on both ends of these two camera images on the screen on the right door side, whereas on the screen on the left door side, these two cameras It is on the middle side of the image.
Such display differences can be confusing to the crew. When the crew tries to combine two adjacent camera images and recognize them as one image, the passengers move to the door in opposite directions on the screen on the right door side and the screen on the left door side.
In order to avoid this confusion, for example, the following second display method can be used.

(Second display method)
FIG. 13 shows a processing flow of the second display method related to the divided display by the monitoring system 100.
Steps S41 to S51 in the processing flow of the second processing method are the same as steps S21 to S31 in the processing flow of the first processing method except for step S44.
In the second processing method, when it is determined in step S43 that the door on the right side is opened, unlike step S24 in the first processing method, the variable A for the cameras of D1 and D3 is set to "1". “2” is set in the variable A for the cameras of D2 and D4 (step S44).

FIG. 14A shows an example of a screen on the right door side according to the second display method. Further, FIG. 14B shows an example of a screen on the left door side according to the second display method. According to the second display method, on both the screen on the right door side and the screen on the left door side, camera images taken by two cameras of the same vehicle are displayed in such a manner that the vehicle bodies are adjacent to each other back to back between the images. On the contrary, the camera images taken by the two cameras of the same vehicle may be displayed in such a manner that the vehicle bodies are separated from each other between the images. In this case, it can be realized only by reversing the setting of the variable A in steps S44 and S45.

According to the above second display method, the display position of the vehicle body in the two camera images of the same vehicle is unified to the middle side or both end sides of the two adjacent areas displaying the two camera images. That is, regardless of the side where the door opens, the display position of the vehicle in the two camera images is fixed, and the allocation of the camera images to each area is controlled. As a result, the direction of movement of passengers toward (or coming out of) the door can be the same for the screen on the right door side and the screen on the left door side. In particular, by allocating the display position of the vehicle in the two camera images so as to be unified on the intermediate side of these two camera images, the crew recognizes the two camera images of the same vehicle as one image. This makes it easier to monitor and improves monitoring efficiency. Therefore, the crew will be able to recognize the movements of passengers in all areas to be monitored more quickly and accurately.

Here, in the second display method, the traveling direction of the train in the divided display differs between the screen on the right door side and the screen on the left door side. For example, on the screen on the right door side, the traveling direction of the train in the split display changes from left to right (see FIG. 15A). On the other hand, on the screen on the left door side, the traveling direction of the train in the divided display is from right to left (see FIG. 15B).
Such a difference in display does not hinder the safety confirmation of passengers by the crew, but in order to obtain a more preferable layout, for example, the following third display method can be used.

(Third display method)
FIG. 16 shows a processing flow of the third display method related to the divided display by the monitoring system 100.
Steps S61 to S71 in the processing flow of the third processing method are the same as steps S41 to S51 in the processing flow of the second processing method except for steps S64 and S66.
In the third processing method, when it is determined in step S63 that the door on the right side is opened, the display control unit of the monitor sets the variable A for the cameras of D1 and D3 to the variable A as in step S24 of the first processing method. “2” is set, “1” is set in the variable A for the cameras of D2 and D4 (step S64), and the left and right inversion processing is performed on all the camera images (step S66). That is, left and right with respect to all the camera images used when the door on the predetermined side is opened so that the traveling direction of the train in the camera image is constant regardless of the side where the door opens. Is reversed.

FIG. 17A shows an example of a screen on the right door side according to the third display method. Further, FIG. 17B shows an example of a screen on the left door side according to the third display method. According to the third display method, on both the screen on the right door side and the screen on the left door side, the camera images taken by the two cameras of the same vehicle are displayed in such a manner that the vehicle bodies are adjacent to each other back to back between the images. Crew members will be able to recognize passenger movements in all areas to be monitored faster and more accurately.

Further, in the third display method, the traveling direction of the train in the divided display can be matched between the screen on the right door side and the screen on the left door side. That is, as shown in FIG. 18A as an example of the screen on the right door side and FIG. 18B showing an example of the screen on the left door side, the traveling direction of the train in the divided display is unified from right to left. As a result, it is possible to eliminate the difference in the traveling direction of the train in the divided display as in the second display method. Therefore, the crew can more efficiently check the movement of passengers in all areas to be monitored.

As described above, the third display method has an advantage over the second display method. However, the second display method also has an advantage over the third display method. That is, in the second display method, the left-right reversal processing of the camera image is unnecessary. Since the processing load for reversing the camera image is relatively large, it is possible that the processing time will be long. The second display method is more suitable than the third display method for a monitoring system that requires real-time monitoring.

In the above embodiment, the camera image is cut out and the top and bottom are reversed on the monitor, but each camera may perform these processes. In this case, each camera may hold in advance information on the image cropping frame and information indicating whether or not it is necessary to turn it upside down, or receive it from a monitor or a server and perform processing. That is, for example, a camera whose mounting posture is turned upside down is stored in advance with information indicating that it needs to be turned upside down, or the information is transmitted from a monitor or a server and the camera is based on the information. The camera image may be inverted by itself. As a result, the load on the camera is slightly increased, but the load on the network and the monitor can be reduced.

Further, in the above embodiment, the display areas of the two monitors 141 to 142 are each divided into 12, and up to 12 vehicle formations are supported, but the present invention is not limited to this.
For example, the number of divisions of the display area may be changed according to the number of train cars. As an example, as shown in FIG. 19, the display areas of the two monitors 141 to 142 may be divided into eight, respectively. In this case, the camera image of the 8-car train can be displayed on the monitor without waste.

Further, as shown in FIG. 20, three monitors 141 to 143 (or more) may be used. Further, a plurality of monitors arranged side by side may be regarded as one monitor and display numbers may be assigned. That is, as shown in FIG. 20, for example, the display numbers "1" to "24" are set to the upper area of the monitor 141, the upper area of the monitor 142, the upper area of the monitor 143, and the lower area of the monitor 141. , The lower area of the monitor 142 and the lower area of the monitor 143 may be allocated in this order.

Further, a function for enlarging the camera image may be provided. For example, when a plurality of camera images are divided and displayed on the monitor 141 and one of the camera images is selected (for example, a touch operation), the monitor 141 is switched to the left and right divided into two, and the selected camera image is selected. And the other camera image of the same vehicle is enlarged and displayed side by side. Alternatively, the display of the monitor 141 is maintained as it is, and the monitor 142 is switched to the left and right divisions to enlarge the selected camera image and other camera images of the same vehicle and display them side by side. After that, when any one of the camera images displayed on the monitor 141 (or the monitor 142) is divided into two parts on the left and right, only the selected camera image is switched to a further enlarged display. As a result, the crew can check the camera image of interest in more detail.

In order to support the various types of divided display as described above, the control information of the divided display (including the information of the divided format of the display area of the monitor and the information of the display number for identifying each divided area) is provided. A plurality of patterns may be prepared, and the control information of the divided display to be applied may be switched according to the number of vehicles, the instruction of the enlarged display, and the like.

In the above embodiment, as shown in FIG. 6, the cameras D1 and D2 and the cameras D3 and D4 are provided between the two doors so as to face each other, but the mounting positions of the cameras D1 to D4 are the present invention. It is not limited to the above, and various changes may be made. For example, in FIG. 6, the cameras D1 and D4 may be installed on the vehicle front side from the doors 121 and 124, respectively, and the cameras D2 and D3 may be installed on the vehicle rearmost side from the doors 122 and 124, respectively. In this case, for example, the variables A in steps S24 and S25 of FIG. 11 are reversed in the cameras D1 and D2 and the cameras D3 and D4, respectively.

Further, the cameras D1 and D2 and the cameras D3 and D4 may be installed in the same direction to photograph different doors. For example, as shown in FIG. 21, cameras D1 and D4 are installed on the front side of the vehicle from the doors 121 and 124 to photograph the doors 121 and 124, and the cameras D2 and D3 are oriented in the same direction as the cameras D1 and D4, respectively. It may be installed on the front side of the vehicle of the doors 123 and 124 so as to photograph the doors 122 and 123. In this case, instead of flipping the images of the cameras D2 and D4 upside down, it is necessary to flip the images of the cameras D3 and D4 upside down. Further, for example, the variables A in steps S24 and S25 of FIG. 11 are reversed in the cameras D1 and D2 and the cameras D3 and D4, respectively.

Further, in the above embodiment, the example in which two doors are provided on each side surface of the vehicle has been described, but the number of doors is not limited in the present invention, and the number of doors is 3 on each side surface of the vehicle. There may be more than one. In this case, in order to display the divided display of the above embodiment, the door image on the monitor is displayed based on the traveling direction of the train, the information on the side where the door opens, and the identification information (VS number and camera number) of each camera. The calculation formula of the display number DN and the variable A may be set so that the arrangement is the same as in the above embodiment.

In this case, the display number DN can be calculated by the following (Equation 3) or (Equation 4), where V is the number of vehicles, D is the number of doors (number of cameras) on one side of the vehicle, and n is the VS number.
DN = D (n-1) + A ... (Equation 3)
DN = D (Vn) + A ... (Equation 4)
Here, the variable A takes an integer value of any of 1 to D depending on the position of the camera in the vehicle. Further, which of the above (Equation 3) and (Equation 4) is used is determined according to the traveling direction of the train.

As an example, the setting of the variable A in the case where there are four doors and four cameras on each side of the vehicle in the arrangement as shown in FIG. 22 will be described. In FIG. 22, only the first vehicle 311 is shown as a representative. The vehicle 311 has four doors 321-24 and four cameras 331-334 on one side and four doors 325-328 and four cameras 335-338 on the other side. Two cameras are arranged on each side of the vehicle so as to face each other between the two front doors and face each other between the two rear doors. Further, each camera is assigned a camera number of D1 to D8 clockwise. In this case, for example, when the door on the right side opens, the variable A related to D1 and D5 is "2", the variable A related to D2 and D6 is "1", and the variable A related to D3 and D7 is "4". , "3" is set for the variable A related to D4 and D8, and when the left door opens, "3" is set for the variable A related to D1 and D5, and "4" is set for the variable A related to D2 and D6. The variable A related to D3 and D7 may be set to "1", and the variable A related to D4 and D8 may be set to "2".

As described above, in the present invention, the display area of the monitor is divided into a plurality of areas, an area ID (display number in the embodiment) is set in each area, information indicating the traveling direction of the train, and the side where the door opens. Based on the information and the identification information (VS number and camera number) of each camera, the area ID for displaying each camera image is calculated, and each camera image is displayed in the area corresponding to the calculated area ID.

Here, the configurations of the system, the device, and the like according to the present invention are not necessarily limited to those shown above, and various configurations may be used.
Further, the present invention can be provided, for example, as a method or method for executing the process according to the present invention, a program for realizing such a method or method, a storage medium for storing the program, or the like.

As an example, the display control unit that controls the display of the monitor may be realized by executing a predetermined program on the computer of the monitor or the server. That is, for example, the display control unit may be realized by the processor of the computer constituting the display control unit reading a program stored in a data storage device such as a hard disk or a flash memory into the memory and executing the program. ..

The present invention can be used in a monitoring system in which a crew member confirms a camera image attached to each vehicle of a train on a monitor.

100,500: Surveillance system, 111-116,311,511-516: Vehicle, 121-124,321-328,521-524: Door, 131-134,331-338,531-532: Camera, 135,535 : Switching hub, 141-143,541: Monitor, 151: Server, 152: Recording device, 153: Upper server, 220: DOO camera, 221: Lens, 210: Body outer wall

Claims (3)

In a monitoring system equipped with a camera that captures at least the vicinity of a door of a vehicle forming a train and a monitor that displays a camera image taken by the camera in the train.
The cameras are placed on the doors provided on both sides of the vehicle.
A display control unit is provided which controls the display area of the monitor by dividing it into a plurality of areas and assigning and displaying a plurality of camera images taken by the cameras of each vehicle to each area.
The display control unit is a monitoring system that controls the allocation of the camera image to each area based on the information indicating the traveling direction of the train and the information indicating the side on which the door opens. In the monitoring system according to claim 1,
A surveillance system characterized in that a plurality of the cameras are arranged so as to face each other on both sides of the vehicle. In the monitoring system according to claim 1,
A surveillance system characterized in that a plurality of the cameras are arranged so as to face the same direction on each side of the vehicle.

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