JPH09193803A - Safety monitoring method near platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a passenger or an article fallen from a platform and that surely near the platform having lots of obstacles and crowded with lots of passengers. SOLUTION: In a safety monitoring method near a platform constituted so that the image near the platform taken by plural TV cameras 1 is projected on a TV monitor 2a and the image of the TV camera 1 in which a person is detected out of that is projected on the TV monitor 2 with preference and a warning is issued as required, plural TV cameras 1 are installed below the platform and the picture of a scene across the rail on which a train 4 is passed is taken from the downside of the platform by these TV cameras 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety monitoring method in the vicinity of a platform, which includes a passenger falling from a station platform on a track or an article falling on the track, a passenger being caught between a vehicle and a vehicle, and a train and the platform. It is used for safety monitoring to detect accidents such as passengers being trapped between and to prevent accidents.

[0002]

2. Description of the Related Art Conventionally, safety monitoring on platforms and orbits has been performed as follows. A TV camera is attached to the platform, and the images of the platform and orbit taken by the TV camera are displayed on a monitor installed on the platform, station staff room, or a center station for monitoring, which the station staff and the conductor of the train see. They were watching their movements on a long platform to monitor their safety.

However, it is difficult for station staff and conductors to constantly watch the image displayed on the monitor because of the balance with other work, and there is a possibility of being overlooked. Was desired. Therefore, conventionally, the following automatic monitoring method has been proposed.

One example is the method described in Japanese Patent Application Laid-Open No. 61-146085, and this monitoring method is a TV.
The camera captures images on the platform and on the orbit, and the image processing device captures the image currently captured by the TV camera and the image captured before that (when the image captured immediately before is used, there is no abnormality in advance). It may be used in some cases) and it is detected in which area of the image the change in the image occurs, and the change occurs in a predetermined area set in advance. In this case, the change portion is displayed on the monitor with a caution mark, and a signal for operating an alarm device and a security device (for example, a train braking system) is output.

Other than the one using image processing for safety monitoring, there is one described in JP-A-2-101901. This is because a laser beam is output from the light emitter installed at the tip of the platform in the train entry direction toward the train entry side of the platform along the platform, and this laser beam is provided at the rear end of the train entering the platform. After the train arrives at the platform and passengers get on and off, the train door is closed by the door device and the door closing signal is detected by the detector inside the train. When the laser light to the light receiver is blocked by the passengers who are present in the connecting part of the train and the passengers who have their bodies attached to the connecting part of the train, an abnormality is detected by this light blocking and a brake command is automatically output to the train brake controller. Therefore, the train is prevented from starting or the train that started is stopped suddenly.

[0006]

However, among the above-mentioned monitoring methods, the safety monitoring using the image processing described in JP-A-61-146085 has the following problems. . When many people were crowded on the platform, there were many false positives, which was a problem in practice. . There are many pillars that support the roof and ceiling on the platform, which creates blind spots, and even if the platform is curved, the blind spots increase, which causes a problem in that the detection accuracy becomes poor. . While the train is on the side of the platform, the train must be excluded from the targets of abnormality detection so that the train is not detected as a foreign object, and the setting of the dangerous area by the image processing device is limited to the platform. . Therefore, for example, a person who has fallen into the gap between the platform and the train or a person who has dropped into the vehicle-to-vehicle connecting portion cannot be detected, and a personal injury in such a situation cannot be prevented.

The safety monitoring method described in Japanese Patent Laid-Open No. 2-101901 has the following problems. . When the platform is curved, the light emitted from the light emitting device of the platform and traveling straight ahead cannot be received by the light receiving device of the train, so there is a problem that it cannot be used. . Even if the platform was straight, it was not possible to detect these passengers if they fell into the gap between the platform and the train or the connection between the vehicles before the doors were closed.

[0008]

As shown in FIG. 1, a safety monitoring method near a platform according to a first aspect of the present invention is to display on the TV monitor 2 images near the platform captured by a plurality of TV cameras 1. The TV monitor 1 preferentially displays the image of the TV camera 1 in which a person is detected.
In the safety monitoring method for the vicinity of the platform, in which a plurality of T
The V camera 1 is installed under the platform 3 and these TVs are
The camera 1 captures an image from under the platform 3 to the track on which the train 4 passes.

According to the second aspect of the present invention, the safety monitoring method near the platform is as follows. As shown in FIGS. 5 and 6, the TV camera 1 is installed under the platform 3 in the longitudinal direction thereof, and the TV camera 1 is installed. Thus, an image is taken in the longitudinal direction of the platform 3 from under the platform 3 to the track on which the train 4 passes.

A safety monitoring method in the vicinity of the platform according to claim 3 of the present invention is as shown in FIGS.
The TV camera 1 is installed so as to face the track, and the TV camera 1 captures images from under the platform 3 to the track on which the train 4 passes.

According to a fourth aspect of the present invention, there is provided a safety monitoring method near a platform, as shown in FIG. 2 (b), in which a TV camera 1 is installed above a track, and the TV camera 1 is used between train cars 4. The connection part is photographed.

According to a fifth aspect of the present invention, there is provided a safety monitoring method near a platform, as shown in FIGS. 8 to 10, in which a TV camera 1 having a line-shaped field of view is arranged below the platform 3 and the TV camera is provided. The image of the bottom of the platform 3 is photographed in 1.

According to a sixth aspect of the present invention, there is provided a safety monitoring method in the vicinity of a platform as shown in FIGS.
A colored tape, a fluorescent paint-coated tape, an LED decorative cable, etc. are provided in the shooting area of the V camera 1 so as to distinguish the shooting area from the surrounding scene.

According to a seventh aspect of the present invention, there is provided a safety monitoring method near a platform as shown in FIGS. 3, 4, 7 and 10, in which a current image taken by the TV camera 1 and the TV camera 1 before the current image are taken. The presence / absence of a person, movement, etc. in the photographing area are detected by comparing the images photographed by the.

The safety monitoring method around the platform according to claim 8 of the present invention is shown in FIGS. 11-14 and 18-2.
As shown in FIG. 1, when a person enters the shooting area of the TV camera 1, it is detected by the person detection sensor 5, and based on this detection, the image of the TV camera 1 in which the person is detected is preferentially displayed on the TV. The image is displayed on the monitor 2.

According to a ninth aspect of the present invention, in the safety monitoring method near a platform, the person detecting sensor 5 is an ultrasonic sensor, an infrared sensor, a pressure sensitive sensor, an optical sensor or the like.

In the safety monitoring method near the platform according to claim 10 of the present invention, the human detection sensor 5 is an optical sensor, and the sensor has a wavelength different from the illumination light with which the photographing area of the TV camera 1 is irradiated. And a semiconductor light receiving element for receiving the linear light emitted by the semiconductor laser element.

[0018]

Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2 as a first embodiment of a safety monitoring method for the vicinity of a platform according to the present invention. A large number of TV cameras (for example CC
2 of the D camera 1), the TV camera 1 arranged on the main body of the vehicle 12 of the train 4 stopped on the platform 3 is shown in FIG.
As shown in FIG. 2A, the TV camera 1 mounted below the platform 1 and arranged at the connecting portion 13 between the cars 12 of the stopped train 4 has a ceiling of the platform 3 as shown in FIG. 2B. It is attached to the roof. The TV camera 1 of FIG. 2 (a) shoots from below the platform 3 onto the track 14 and shoots, for example, the images shown in FIGS. 3 (a) and 3 (b). In addition, the TV camera 1 of FIG.
Also, the vicinity of the track 14 is photographed from below the platform 3 through the gap of the connecting portion 13 between the vehicles 12. It should be noted that the field of view of the many TV cameras 1 shown in FIG.
The lower side of the home 3 can be monitored over the entire length of the home.

3 (a) and 3 (b) are examples of images taken by the TV camera 1 of FIG. 2 (a).
Shows a state in which the train 4 is stopped beside the platform 3 and there is no abnormality. FIG. 3B shows a train 4 stopped beside the platform 3 between the train 4 and the platform 3. 3B is an image in a state in which the passenger 16 has fallen and collapsed, and FIG. 3B is an image to be notified as an abnormality. In addition, in both images of FIGS. 3 (a) and 3 (b),
Although the lower part of the train 4 is shown on the track 14, if the train 4 does not exist on the platform 3, the image of the train 4 on the track 14 does not exist.

The video image taken by the TV camera 1 of FIG. 2B is similar to the video image taken by the TV camera 1 of FIG.
When the passenger 16 falls, the image of the passenger 16 can be captured.

The TV cameras 1 shown in FIGS. 2 (a) and 2 (b) are each provided with an auxiliary light 15 so that the train 12 can be shadowed by the train 4 even in the daytime, under the dark platform 3 and on the train 12 train 12.
The connection portion 13 of can be photographed satisfactorily. This auxiliary illumination 15 may be visible light or infrared light,
It is desirable that the light has a wavelength that matches the characteristics of the V camera 1. If the shooting area of the TV camera 1 is already illuminated by another illumination device, it is not necessary to provide auxiliary lighting.

The images taken by the TV camera 1 shown in FIGS. 2 (a) and 2 (b) are transmitted through the signal transmission cable 10 such as a coaxial cable or an optical fiber cable to the image processing apparatus 11 provided in the monitoring center of the station. Is input in real time and is image-processed in the image processing apparatus 11. In addition to images (video signals) from each of the TV cameras 1, ID information for individually identifying a large number of TV cameras 1, the number of the platform 3 to which the TV cameras 1 are attached,
Etc. are also output, and these information are also input to the image processing device 11 through the signal transmission cable 10.

The image processing device 11 processes a video signal captured by each TV camera 1 to detect whether or not a person (person or thing) is present in the video, and a video detecting function. When there is a person inside, a video selection function of displaying the video on the TV monitor 2 in priority to other videos, a superimposition display function of superimposing characters and figures on the video of the TV monitor 2, and the like. have.

The person detecting function of the image processing apparatus 11 is such that 30 video frames taken by the TV camera 1 per second are used as the current video frame and the past video frame (when the immediately previous video frame is used, abnormalities are detected in advance). There is a case where a video frame of a video image captured in the absence of the image is used), and a person in the video is detected by taking a difference between both video frames. For example, when the current video frame is as shown in FIG. 3A and the past video frame is as shown in FIG. 3B, the difference shown in FIG. To detect. In this person detection function, even if a difference is extracted in the compared images,
Unless we calculate the size and confirm that it is the size of a person (including babies to adults), we will not judge it as abnormal and judge abnormalities even if small animals such as mice are extracted. Don't do

Further, the person detection function has not only a function of comparing the entire video frames but also a function of masking unnecessary portions of the video frames and cutting out necessary portions of the video frames. It is possible to take the difference only for the desired region in the inside. This function is effective in preventing the train 4 in the video from being erroneously detected as a person.

The image selection function of the image processing device 11 is as follows.
When a person is detected in the image of a certain TV camera 1 by the person detection function, the image of the TV camera 1 is replaced by the image of another TV camera 1 in which no person is detected,
It is displayed on the monitor 2 with priority.

The superimposition display function in the image processing apparatus 11 is also called a superimpose function. Here, the ID of the TV camera 1 in which a person is detected is detected.
Information, position information of the TV camera 1, information that identifies the platform 3, information that shows more detailed position on the platform 3, information that makes it easier to see by pointing to a person in the video, time when an abnormality occurs, etc. It is something to display.

The image processing apparatus 11 is provided with a function of transmitting an abnormality to a wireless terminal device carried by a station staff by wireless communication means when an abnormality occurs due to the detection of a person in the image. It is also possible to do so.

[0029]

Embodiment 2 of the present invention will be described with reference to FIG. 4 as a second embodiment of the safety monitoring method for the vicinity of the platform of the present invention. This example is the image processing apparatus 11 in the first embodiment.
The image processing method of FIG.
One small area 17 is set and images are compared in each small area 17.

In this image processing device 11, all nine small areas 17 can be targets of abnormality detection, but some small areas 17 can be excluded from the targets of abnormality detection as necessary. For example, while the train 4 is on the platform 3, the small regions 17 in the upper and middle stages can be excluded from the target of abnormality detection, and only the lower stage can be the target of abnormality detection. In this case, the train 4 on the track 14 can be excluded from the target of abnormality detection, and erroneous person detection by the train 4 can be prevented.

Further, even if there is a change in the image in any one of the nine small areas 17, it is not reported as an abnormality. For example, only when an abnormality is detected in two or more small areas 17 at the same time. An abnormality can be reported.
By doing this, it is possible to avoid erroneous person detection by a small animal such as a small mouse. Note that here, nine small areas 17 are set in the video frame,
If the small area 17 is set more finely, more advanced person detection can be performed. For example, it is possible to grasp the moving direction of a person.

[0032]

Third Embodiment A third embodiment of the safety monitoring method for the vicinity of the platform of the present invention will be described with reference to FIGS. In this example, as shown in FIG.
The lens is mounted under the platform 3 with the longitudinal direction of the platform 3 oriented. In this case, one TV
With the camera 1, it is possible to take a long picture between the train 4 and the platform 3 along the same platform 3, for example, one TV
With the camera 1, it is possible to capture an area corresponding to one vehicle 12 of the train 4 stopped beside the platform 3. The TV camera 1 for photographing the connecting portion 13 between the vehicles 12 of the train 4 is hung from the ceiling of the platform 3 and attached, and the connecting portion 13 is photographed from above the train 4.

FIGS. 7A and 7B show the TV camera 1 of FIG.
7 (a) is an image in a state in which there is no abnormality, and FIG. 7 (b) is an image in a state in which a person has fallen from the platform 3 to cause an abnormality. Is. In the TV camera 1 of FIG.
The image as shown in FIG. 7A is taken, but when the passenger 16 falls from the platform 3, the image as shown in FIG. 7B is taken. In addition, FIG.
In the image of (b), the train 4 is shown on the track 14, but when the train 4 does not exist on the platform 3, there is no image of the train 4 on the track 14.

The image of the lower side of the vehicle 12 and the image of the connecting portion 13 photographed by this method are subjected to image processing by the image processing device 11 and the presence or absence of a person in the image is detected. The image processing apparatus 11 compares the video image of FIG. 7 (a) taken in advance with the video image of FIG. 7 (b) being taken by the TV camera 1 to extract the difference between them, and for example, FIG. ) To extract the image of the collapsed passenger. When a person is detected in the video, the video is displayed on the TV monitor 2 and the abnormality is notified to the outside by an appropriate means. In this case, the number of the platform 3 and the position information for specifying the position on the platform 3 are also displayed on the TV monitor 2 in a superimposed manner.

[0035]

Embodiment 4 of the present invention will be described with reference to FIGS. 8 and 9 as a fourth embodiment of the safety monitoring method for the vicinity of the platform of the present invention. In this example, the TV camera 1 is attached to the lower portion of the front end side of the platform 3 so that the rear end side of the platform 3 is viewed, and the entire TV platform 1 can be photographed by the TV camera 1. Also, a line C having a line-shaped field of view under the platform 3 along the platform 3
Multiple CD sensors (TV cameras) 1 are attached,
A person who has fallen down from the platform 3 can be detected by these line CCD sensors 1. Furthermore, the TV camera 1 is attached to the ceiling of the platform 3 and the train 1 of the train 4 stopped on the platform 3
The connecting portion 13 between the two can be photographed.

FIG. 9 shows an example of how the line CCD sensor 1 is attached. The line CCD sensor 1 takes a line image of a portion just below the edge of the platform 3. The range captured by one line CCD sensor 1 is the entire length of one train 4 vehicle. In this line CCD sensor 1, line-shaped images as shown in FIGS. 10 (a) and 10 (b) are obtained, and the passengers 1 are placed under the platform 3.
When 6 falls and falls, the line-shaped image shown in FIG.

The image of the TV camera 1 attached to the lower end of the platform 3, the image of the line CCD sensor 1 attached below the platform 3, and the image of the TV camera 1 attached to the ceiling of the platform 3 are coaxial. It is input to the image processing apparatus 11 of the monitoring center through a signal transmission cable 10 such as a cable or an optical fiber cable, and the presence of a person is detected by the image processing apparatus 11. Here, the image processing device 11 is the line CCD sensor 1
And the image of the TV camera 1 that captures the connecting portion 13 of the vehicle 12 are subjected to image processing to detect the presence of a person. When the image processing device 11 detects an abnormality in the image of the line CCD sensor 1, instead of displaying the image of the line CCD sensor 1 on the monitor 2, the TV camera 1 of the normal type attached to the front end of the platform 3 is displayed.
Is displayed on the TV monitor 2, and the TV monitor 2 superimposes and displays ID information of the line CCD sensor 1 in which the abnormality is detected, the number of the platform 3, and more detailed position information on the platform 3.

When the image processing apparatus 11 detects a person from the image of the line CCD sensor 1, it counts the number of pixels in which a change has occurred, and whether the person is a person or a mouse is detected based on the magnitude of the number of pixels. When it is determined that the person is a person, the person detection is first performed.

When a person is detected in the image of the TV camera 1 which photographs the connecting portion 13 of the vehicle 12 of the train 4,
The image of the TV camera 1 is displayed on the TV monitor 2.

[0040]

Fifth Embodiment of the Invention A fifth embodiment of the safety monitoring method for the vicinity of the platform of the present invention will be described with reference to FIGS. In this example, the platform 3 has a TV camera 1 for photographing the lower side of the platform along the longitudinal direction of the platform 3, the TV camera 1 for photographing the connecting portion 13 of the vehicle 12 stopped on the platform 3, and the platform 3 An optical person detection sensor 5 for detecting a person is attached under the.

Platform 3 of the TV camera 1
The TV camera 1 for photographing the lower side of the vehicle is mounted under the platform 1 as shown in FIG. 12, and the TV camera 1 for photographing the connecting portion between the vehicles 12 is mounted on the roof of the platform 3. The person detection sensor 5 is attached to the track surface under the platform 3. The video signal of the TV camera 1 and the detection signal of the human detection sensor 5 are all input to the image processing device 11 in the monitoring center by a coaxial cable or an optical fiber cable.

The person detecting sensor 5 is an optical sensor composed of a semiconductor light emitting element which emits a laser beam and a semiconductor light receiving element which receives a laser beam, and two sensors 5 are paired to detect one person. The light emitted from the sensor 5 is received by the other person detection sensor 5, and when the light between the person detection sensors 5 forming a pair is blocked by a person, a detection signal is output from the person detection sensor 5. Is output.

In this safety monitoring method, the person detecting sensor 5
Since there is a person detection function by the TV, the TV in which the abnormality occurs even if the image of the TV camera 1 is not processed to detect the person.
The image of the camera 1 can be displayed on the monitor 2,
Accurate person detection is possible by using image processing together. When an abnormality occurs, the image of the TV camera 1 in which the abnormality has occurred, the number of the platform 3 and the position on the platform 3 are displayed in an overlapping manner on the monitor 2.

A plurality of the optical sensors 5 are installed along the platform 3 at a predetermined interval so that a person's fall or the like can be detected over the entire length of the platform 3. In the optical sensor 5, laser light having a different wavelength from the illumination light of the auxiliary illumination 15 of the TV camera 1 is used, and even if the illumination light hits the semiconductor light receiving element of the optical sensor 5, it is not detected.

[0045]

Sixth Embodiment of the Invention A sixth embodiment of the safety monitoring method for the vicinity of the platform of the present invention will be described with reference to FIGS. In this example, as in the case of the fifth embodiment, the TV camera 1 for photographing the lower side of the platform along the longitudinal direction of the platform 3 and the connecting portion 13 of the vehicle 12 parked on the platform 3 are photographed for the platform 3. TV camera 1
And an optical person detection sensor 5 for detecting a person under the platform 3 are attached, but the person detection sensor 5 and the TV camera 1 for photographing the underside of the platform 3 are integrated as a detection unit 18. .

As shown in FIG. 15, the detection unit 18 outputs, as a signal, the number of the platform 3 to which the detection unit 18 is attached, the number of the detection unit 18, and the video data captured by the detection unit 18. The image processing apparatus 11 detects a person based on the information output from the detection unit 18, and when the person is detected, the image captured by the detection unit 18 is displayed on the monitor 2, and the number of the platform 3 and the position on the platform 3 are also displayed. Is displayed.

[0047]

Seventh Embodiment of the Invention A seventh embodiment of the safety monitoring method for the vicinity of the platform of the present invention will be described with reference to FIG. In this example, a sheet 19 such as a colored tape, a tape with fluorescent paint, an LED decorative cable, or the like having a brightness different from the surrounding scene is laid on the lower portion of the platform 3, and is photographed by the TV camera 1. The person detection function of the image processing device 11 is reinforced by making the person more prominent.

[0048]

Eighth Embodiment of the Invention The eighth embodiment of the safety monitoring method for the vicinity of the platform of the present invention will be described with reference to FIGS. In this example, a detection unit 20 including a TV camera 1, auxiliary lighting 15, and a person detection sensor 5 is attached under the platform 3 along the platform 3, and these detection units 20 are signal transmission cables such as a coaxial cable and an optical cable. 10 and the cable 10 is connected to the image processing apparatus 11 in the monitoring center.

FIG. 20 shows the structure of the detection unit 20, which looks forward with respect to the platform 3.
A TV looking sideways with respect to the V camera 1 and the platform 3.
A camera 1 is built in, and an optical sensor 5 including a semiconductor light emitting element 21 and a semiconductor light receiving element 22 is also built in. The semiconductor light emitting element 21 outputs linear light as shown in FIG. 21, and the corresponding semiconductor light receiving element 22 is capable of receiving linear light.

The detection unit 20 further receives a command from the image processing device 11 and transmits a video signal of the TV camera 1 and a detection signal of the optical sensor 5, a communication unit 23, a control unit 24 for controlling each unit, and a TV. The auxiliary illumination 15 of the camera 1 is also built in. Two of the detection units 20 form a pair, and normally, when the laser light output from one detection unit 20 is received by the other detection unit 20 and this laser light is no longer received, an abnormality is detected. It has become.

In each of the embodiments described above, a large capacity communication line must be secured in order to transmit in real time the images captured by a large number of TV cameras 1. It is desirable to use a transmission line. Even if an optical fiber transmission line is used, many TV cameras 1
If it is difficult to transmit the video output from the device without delay, the image is compressed using an image compression technique, and the data amount is reduced before transmission.

[0052]

According to the safety monitoring method for the vicinity of the platform of the present invention, the following effects can be obtained. . Safety monitoring can be performed even on a platform crowded with many people. . Safety monitoring can also be performed on curved platforms. . Even if the train is on the platform, it is possible to reliably monitor people who have dropped on the platform or those who have dropped on the connection, which is highly safe. . Safety can be monitored even if the platform has stanchions.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a safety monitoring method near a platform of the present invention.

FIG. 2 is an example of mounting a TV camera in the safety monitoring method of FIG. 1, where (a) is a TV for monitoring the vicinity of a train car.
The camera installation explanatory drawing, (b) is the installation explanatory drawing of the TV camera which monitors the connection part of a train.

3A and 3B are examples of images taken by a TV camera in the safety monitoring method of FIG. 1, where FIG. 3A is a normal image and FIG.
Is an image at the time of abnormality, and (c) is an image extracted from the images of (a) and (b).

FIG. 4 is a second embodiment of the safety monitoring method for the vicinity of the platform of the present invention, (a) is a video imaged in a normal state, and (b) is a video imaged in an abnormal state.

FIG. 5 is an explanatory view showing a third embodiment of the safety monitoring method for the vicinity of the platform of the present invention.

6 is an installation example of a TV camera for monitoring the vicinity of a train car, which is an example of installing the TV camera in the safety monitoring method of FIG.

7A and 7B are examples of images taken by a TV camera in the safety monitoring method of FIG. 5, where FIG. 7A is a normal image and FIG.
Is an image at the time of abnormality, and (c) is an image extracted from the images of (a) and (b).

FIG. 8 is an explanatory diagram showing a fourth embodiment of the safety monitoring method near the platform of the present invention.

9 is an example of how to install the TV camera in the safety monitoring method of FIG. 8, and is an explanatory view of the installation of the TV camera that monitors the vicinity of the train car.

10 is an example of an image taken by a TV camera in the safety monitoring method of FIG. 8, where (a) is a normal image,
(B) is an image at the time of abnormality.

FIG. 11 is an explanatory diagram showing a fifth embodiment of the safety monitoring method near the platform of the present invention.

12 is an installation example of a TV camera for monitoring the vicinity of a train car, which is an example of installing the TV camera in the safety monitoring method of FIG.

FIG. 13 is an explanatory view showing a sixth embodiment of the safety monitoring method near the platform of the present invention.

14 is an installation example of a TV camera for monitoring the vicinity of a train car, which is an example of installing the TV camera in the safety monitoring method of FIG.

FIG. 15 is an explanatory diagram of signals transmitted to a communication cable in the safety monitoring method of FIG.

16 (a) and 16 (b) are explanatory views showing a seventh embodiment of the safety monitoring method near the platform of the present invention.

17A and 17B are images taken by the TV camera of FIG.

FIG. 18 is an explanatory view showing an eighth embodiment of the safety monitoring method for the vicinity of the platform of the present invention.

FIG. 19 is an enlarged explanatory diagram of FIG. 18.

20 is an explanatory diagram of a monitoring device used in the safety monitoring method of FIG.

21 is an explanatory diagram of an optical sensor used in the safety monitoring method of FIG.

[Explanation of symbols]

 1 TV camera 2 TV monitor 3 platform 4 train 5 person detection sensor

Claims (10)

[Claims] 1. A TV monitor (2) displays images near the platform captured by a plurality of TV cameras (1),
In the safety monitoring method near the platform, the video of the TV camera (1) in which a person is detected is preferentially displayed on the TV monitor (2) and an alarm is also issued if necessary. (1) is provided under the platform (3), and the TV camera (1) captures images from under the platform (3) to on the track of the train (4). . 2. A TV camera (1) with a platform (3)
It is installed in the longitudinal direction of the platform (3) under the platform (3) from below the platform (3) with the TV camera (1) in the longitudinal direction of the platform (3). The method for monitoring safety around a platform according to claim 1. 3. A TV camera (1) is installed facing the orbit,
2. The safety monitoring method in the vicinity of the platform according to claim 1, wherein the TV camera (1) captures an image from under the platform (3) to a track on which the train (4) passes. 4. A TV camera (1) is installed above the orbit,
The safety monitoring method near the platform according to each of claims 1 to 3, wherein the TV camera (1) captures an image of the connecting portion between the trains (4). 5. A TV camera (1) having a linear photographing field of view is arranged under the platform (3), and the TV camera (1) photographs under the platform (3). The safety monitoring method in the vicinity of the platform according to each of claims 1 to 4. 6. The TV camera (1) is provided with a colored tape, a fluorescent paint tape, an LED decorative cable, etc. in the photographing area to separate the photographing area from the surrounding scene. The safety monitoring method for the vicinity of the platform according to claim 5. 7. Comparing a current video image captured by the TV camera (1) with a video image captured by the TV camera (1) before the current video image to detect presence / absence of a person, movement, etc. in the capture area. The method for monitoring safety around a platform according to any one of claims 1 to 6, wherein: 8. A TV camera (1) in which a person is detected when a person enters the photographing area of the TV camera (1) and is detected by a person detection sensor (5).
8. The safety monitoring method near the platform according to claim 1, wherein the image of the above is preferentially displayed on the TV monitor (2). 9. A person detection sensor (5) is an ultrasonic sensor,
9. The safety monitoring method in the vicinity of the platform according to claim 8, which is an infrared sensor, a pressure sensitive sensor, an optical sensor, or the like. 10. A person detection sensor (5) is an optical sensor, and the sensor includes a semiconductor laser element that emits light having a wavelength different from that of illumination light applied to a photographing area of a TV camera (1) in a line shape. 10. The safety monitoring method in the vicinity of the platform according to claim 9, further comprising a semiconductor light receiving element that receives the linear light emitted from the semiconductor laser element.