JP3725123B2 - Wireless monitoring system for subway platform track monitoring - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless monitoring system for track monitoring of subway platforms. More specifically, the present invention relates to a wireless monitoring system for preventing human and property damage caused by a track fall accident on a platform in a subway station.
[0002]
[Prior art]
Recently, due to severe road traffic congestion, mass transit means such as subways and buses are often used. Among them, the subway is one of the most widely used mass transportation means.
[0003]
In the case of the subway, the number of passengers is increasing, and as a result, the number of accidents falling from the platform in the station to the track is increasing year by year.
[0004]
For example, in the event of a railroad fall accident from a platform within a station, there is no other means for the train driver to take control of the train within his / her visible distance and visual range or by listening to a wireless handset. .
[0005]
That is, if a sudden situation occurs on the platform track in the station, the visible distance is short, so there is no time to deal with the situation, and the braking distance of the train is long. Even if a driver can see that a person has fallen, it is likely that an accident will occur.
[0006]
In particular, when the platform is curved, accidents may occur more frequently, and such a situation is a dangerous blind spot for both drivers and passengers. A measure to prevent such accidents in advance is to widen the visual range of train drivers.
[0007]
In addition, according to Patent Document 1, a detected object is extracted by analyzing a difference image between an image of a certain time taken by a camera that monitors the platform and the track, and a subsequent image, and its size is estimated. The detected object can be specified.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-228250
[Problems to be solved by the invention]
However, the technique disclosed in Patent Document 1 estimates a detected object from a photographed image, issues a warning command, and notifies a station staff with a warning buzzer or the like, for example. Contact will be made in a conventional manner. For this reason, there is often no time margin for dealing with sudden occurrences. Furthermore, since the detected object is detected and specified from the difference image, it is difficult to significantly reduce detection and specifying errors, and an unnecessary alarm may be notified even when a small animal crosses the track.
[0010]
The present invention has been made in view of such a situation, and by constructing a system such that a monitoring camera installed on a platform in a subway station and a monitoring system in a running train are linked wirelessly, It is an object of the present invention to provide a track monitoring radio monitoring system for a subway platform that enables a train driver to grasp the platform and track conditions in advance before entering the train station.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a power supply means for stably supplying power to a transmission side system, a monitoring photographing means for monitoring the status of platforms and tracks in a subway station, Video data transmission means for transmitting video data from the monitoring photographing means, transmission channel means for transmitting the video data signal from the video data transmission means via a predetermined channel, and from the transmission channel means A transmission unit installed on a platform in a subway station having a transmission antenna for wirelessly transmitting a video data signal to the reception side; and a reception antenna for wirelessly receiving a video data signal from the transmission antenna; Receiving channel means for receiving video data from the receiving antenna via a predetermined channel; and the receiving channel; A video data receiving means for receiving video data representing the status of the platform and tracks in the station, and a video for monitoring the video data from the video data receiving means at the driver's seat of the train It is a track monitoring radio monitoring system for a subway platform comprising a data monitoring means and a receiving unit installed in a driver's seat of a train having power supply means for stably supplying power to the receiving system.
[0012]
Also. According to the present invention, the transmission channel means has an output level of about 10 mW, is composed of four channels, transmits in a frequency band of 2.410 to 2.470 GHz, and uses an FM-modulated PLL system. is there.
[0013]
Furthermore, the transmission antenna and the reception antenna are configured to use a horn antenna, a grid antenna, or a parabolic antenna.
[0014]
According to the present invention, the reception channel means further includes an automatic channel selection control unit that performs control so that the channel circulates and can be automatically selected and converted according to the traveling direction of the train when the train operates.
[0015]
The reception channel means consists of four channels and receives within the frequency band of 2.410 to 2.470 GHz, and the reception level is approximately −85 dBm.
[0016]
Further, the video data monitoring means is configured to monitor the video data transmitted from the transmission side by dividing it into 1, 4, 9, or 16.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration and operation of an embodiment of the present invention will be described in detail with reference to the drawings.
[0018]
FIG. 1 is a block diagram showing a wireless monitoring transmission / reception system according to the present invention, and FIG. 2 is a diagram showing a video state of a multi-divided monitor by mounting the screen divider of the present invention.
[0019]
The wireless monitoring transmission / reception system shown in FIG. 1 is divided into a transmission unit installed on the platform in the subway station and a reception unit installed in the driver's seat of the train.
[0020]
The transmission unit includes a power supply unit 100 for stably supplying power to the transmission side system, a monitoring camera unit 120 for monitoring the status of platforms and tracks in the subway station, and the monitoring camera unit 120 A video data transmission unit 140 for transmitting video data, a transmission channel unit 160 for transmitting a video data signal from the video data transmission unit 140 via a predetermined channel, and a video from the transmission channel unit 160 It comprises a transmission antenna 180 for transmitting a data signal to the receiving side by radio.
[0021]
At this time, the monitoring camera unit 120 is installed for each platform in each station, at a predetermined position where the status of the platform and the track can be easily grasped, and can monitor the surrounding situation with video and audio. .
[0022]
The transmission channel unit 160 has an output level of 10 mW, is composed of four channels, transmits in a frequency band of 2.410 to 2.470 GHz, and uses an FM-modulated PLL system.
[0023]
Further, the transmitting antenna 180 is a directional antenna and uses a horn antenna, a grid antenna, a parabolic antenna, or the like.
[0024]
Preferably, as shown in FIG. 2, when a large number of surveillance camera units 120 are installed on the transmission side, the video data obtained by using the screen divider 130 and the wireless video transmission device 150 is converted into, for example, 1, 4, It can be divided into 9 or 16 for transmission.
[0025]
The receiving unit includes a receiving antenna 200 for receiving a video data signal transmitted from the transmitting antenna 180 by radio, and a receiving channel unit 220 for receiving the video data from the receiving antenna 200 via a predetermined channel. A channel is selected from the reception channel unit 220, a video data receiving unit 260 for receiving video data representing the platform and track conditions in the station premises, and the video data from the video data receiving unit 260 as train driving It comprises a video data monitor unit 280 for monitoring at the seat and a power supply unit 300 for stably supplying power to the receiving system.
[0026]
At this time, the receiving antenna 200 is a directional antenna and uses a horn antenna, a grid antenna, a parabolic antenna, or the like.
[0027]
In addition, the reception channel unit 220 further includes an automatic channel selection control unit 240 that performs control so that the channel circulates according to the traveling direction of the train and can be automatically selected and converted when the train is operating.
[0028]
In this case, the reception channel unit 220 includes four channels and receives within a frequency band of 2.410 to 2.470 GHz, and the reception level is −85 dBm.
[0029]
Preferably, as shown in FIG. 2, the video data monitor unit 280 receives the video data from the screen divider 130 of the transmission unit via the wireless video reception device 250 and performs multi-division into 1, 4, 9, and 16 Can be monitored.
[0030]
FIG. 3 is a schematic diagram showing an operation state of the wireless monitoring transmission / reception system according to the present invention.
[0031]
First, surveillance camera units 120 that can constantly monitor the status of the platform and the tracks in the station premises with video and audio are respectively installed at predetermined positions on the up and down lines of the platform in the subway station. Yes.
[0032]
In addition, the train driver's seat can divide the screen and monitor the video data representing the platform and track conditions before entering the train in the traveling direction transmitted from the monitoring camera 120 on the transmission side. A data monitor unit 280 is installed.
[0033]
In this case, the channel of the corresponding station is assigned to each station in the train traveling direction, and the channel is automatically and cyclically converted by the control of the automatic channel selection control unit 240 having four channels.
[0034]
In this state, when the train travels from the B station on the up line toward the A station, video data representing the platform and track conditions in the station premises before entering from the surveillance camera 120 is transmitted via the transmission antenna 180 in the 2.4 GHz band. Wireless transmission using microwaves. At this time, the train driver can confirm in advance the status of the platform and the tracks in the station station of the entering A station from the video data monitor unit 280 installed in the athletic seat.
[0035]
Of course, when the train departs from station B, the channel No. 2 is changed to channel No. 1 of station A by the control of the automatic channel selection control unit 240, and the driver of the train will now be the platform in the station station of station A. In addition, the video data monitoring unit 280 can monitor the status of the track in advance.
[0036]
In addition, when the train travels from the A station on the down line toward the B station, the driver will stop in the ongoing train as in the case of the train entering the A station from the B station on the up line. The video data monitor unit 280 can monitor in advance the platform and track conditions in the station.
[0037]
That is, the train driver can quickly cope with a sudden situation occurring on the platform in the station.
[0038]
As described above, the present invention has been described with reference to the drawings. However, this is to describe the best embodiment of the present invention and does not limit the present invention. In addition, the present invention can be variously modified and combined within a range not departing from the scope thereof.
【The invention's effect】
[0039]
As described above, the wireless monitoring system for monitoring a subway platform track according to the present invention has the following effects.
[0040]
First, the wireless monitoring system of the present invention allows a driver in an ongoing train to monitor the platform and track status of a station to be stopped in advance before entering the airport, which may occur suddenly in the platform. It is possible to visually recognize an accident such as a fall, and it is possible to minimize a personal accident during a fall accident.
[0041]
Next, the wireless monitoring system of the present invention can contribute to the safe operation of the train by removing the driver's psychological anxiety about the blind spot by freely monitoring the situation of the approaching station at the driver's seat of the train. it can.
[0042]
Furthermore, since the wireless monitoring system of the present invention can quickly cope with a sudden situation in the platform, damage to human life and property is minimized, the safety of subways and railways, and the trust of customers. Can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a radio monitoring transmission / reception system according to the present invention.
FIG. 2 is a diagram showing a video state of a multi-divided monitor by mounting the screen divider according to the present invention.
FIG. 3 is a schematic diagram showing an operating state of a radio monitoring transmission / reception system according to the present invention.
[Explanation of symbols]
100, 300 Power supply unit 120 Surveillance camera 130 Screen divider 140 Video data transmission unit 150 Wireless video transmission device 160 Transmission channel unit 180 Transmission antenna 200 Reception antenna 220 Reception channel unit 240 Automatic channel selection control unit 250 Wireless video reception device 260 Video Data receiving unit 280 Video data monitoring unit

Claims (4)

Power supply means for stably supplying power to the transmission side system, a plurality of monitoring photographing means for monitoring the status of the platforms and tracks in the subway station, and a plurality of images captured by the monitoring photographing means Video data transmission means for dividing and transmitting data, and transmission channel means for transmitting the video data signal output from the video data transmission means via a predetermined channel set for each station ; a transmitting antenna for transmitting to the receiver a video data signal output from the transmitting channel unit wirelessly transmitting unit installed in a subway station yard of the platform, and a video data signal from the transmitting antenna radio And the receiving antenna for receiving the signal, and when the train is operating, the channel circulates automatically according to the traveling direction of the train. Automatic channel selection control means for controlling to convert to a channel set for the arrival station, and the video data from the receiving antenna via the channel set for the arrival station before the train arrives at the arrival station. a receiving channel means for receiving Te, a channel is selected from the receiving channel means, and the video data receiving means for receiving the divided processed image data together representing the status of the station yard of the platform and the line, the video The video data monitoring means for monitoring the video data output from the data receiving means with the divided image at the driver's seat of the train or the selected video and the power supply of the receiving system are stably supplied. and a power supply unit for underground, characterized in that it consists receiving unit installed in the driver's seat of the train Platform line monitoring wireless monitoring system.   The transmission channel means has an output level of about 10 mW, consists of four channels, transmits in a frequency band of 2.410 to 2.470 GHz, and uses an FM-modulated PLL system. The track monitoring radio monitoring system for the subway platform according to 1. 2. The subway platform line monitoring system according to claim 1, wherein said receiving channel means comprises four channels and receives within a frequency band of 2.410 to 2.470 GHz, and the receiving level is approximately -85 dBm. Wireless monitoring system. 2. The track monitoring radio monitoring system for a subway platform according to claim 1, wherein the video data monitoring means monitors the video data transmitted from the transmission side by dividing it into 1, 4, 9, or 16.

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