JP3712954B2 - Anti-train image transmission device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention monitors the passenger situation on the platform by an ITV camera (Industrial Television camera) installed at the platform of the station, and when the train stops at the platform, it is transmitted from the ground via the optical space transmission device. The present invention relates to an image-to-train image transmission apparatus that transmits image information to a train side and displays the image information on a monitor TV set installed in a cab.
[0002]
[Prior art]
In recent years, in a transportation system such as a train, a TV camera (ITV camera) is installed at a station platform, the state of passengers is photographed, the image information is sent to a control room, a monitor device installed on the platform, The image is displayed on the monitor installed in the cab so that the crew can confirm the safety of passengers. In particular, in a one-man train, it is necessary to check passenger safety by projecting passenger images on a monitor device in the cab.
[0003]
In order to display the state of passengers photographed by the TV camera on the monitor device installed in the cab of the train, it is necessary to transmit a signal to the monitor device in the driver's seat using wireless communication.
[0004]
As an example of the wireless system, a system using an optical space transmission system has been put into practical use. A space transmission optical communication device based on the optical space transmission system performs optical communication using atmospheric space as a transmission medium, and inputs signal light output from the light transmitting device to the light receiving device using the atmospheric space as a transmission medium. And optical communication is performed.
[0005]
Conventionally, as shown in FIG. 4, with respect to a train 2 stopped at the platform 1, a light transmission device 3 is installed so as to be located behind the traveling direction and is sharply ± 0.3 ° from the light transmission device 3. An optical signal is transmitted by the beam 4, and the beam 4 is received by the light receiving device 5 installed at the tail end of the train 2 and displayed on the monitor device on the vehicle. In this case, the transmission distance of the beam 4 is set to about 250 m at maximum.
[0006]
In addition, when the home 1 is curved as shown in FIG. 5, a wide communication area cannot be ensured with only one traveling device. For example, a plurality of light transmissions using a building such as the opposing wall 6 is used. The devices 3a and 3b are installed to secure a signal transmission area.
[0007]
[Problems to be solved by the invention]
The above conventional light transmitting device needs to transmit a signal with a sharp beam in order to ensure a long transmission distance. For this reason, a precision optical lens is used, and the device is configured to transmit a signal with a narrow light beam. There was a problem that precise equipment adjustment was necessary. In addition, since the light transmission distance of the beam of the light transmission device is long, there is a risk of being affected by weather conditions such as the influence of sunlight and fog when used outdoors. Further, when the home is curved or meandering, there is a problem that the number of light transmitting devices increases and the cost increases.
[0008]
On the other hand, recently, a safety measure has become widespread that provides a platform fence on the platform of a station and opens the gate of the platform fence only when the train stops at the platform so that passengers can get on and off the train.
[0009]
The present invention was made in order to solve the above-mentioned problem, by providing a light transmitter on the platform fence of the station, and transmitting the image of the home side photographed by the TV camera to the train side from the light transmitter, It is an object of the present invention to provide an anti-train image transmission apparatus that does not require precise optical axis adjustment and can easily perform image transmission to the train side without being influenced by the curved shape of the platform.
[0010]
[Means for Solving the Problems]
A train image transmission apparatus according to a first aspect of the present invention includes a light transmitter including a continuous multi-stage light emitting element provided horizontally horizontally on a train traveling side of a platform fence on a head side in a train traveling direction of a station, and a platform of the station. A TV camera for photographing the situation of the home, a modulation means for modulating a video signal from the TV camera, a drive means for driving the light transmitter by the video signal modulated by the modulation means, A monitor device provided in a train cab, and a train installed opposite to the central portion of an optical signal transmitted in a predetermined range in the lateral direction from the light transmitter when the train stops at a fixed position of the platform a light receiving portion of the optical signal from the light emitter that has been received by the receiving unit and demodulates and a driving means for driving the monitoring device, the light emitting element of the continuous multi-stage of the light transmitter, the optical Multiple-type LE without lens And characterized in that.
A train image transmission apparatus according to a second aspect of the present invention includes a light transmitter composed of continuous multi-stage light emitting elements provided horizontally in the horizontal direction on the train traveling side of the platform fence on the front side of the train traveling direction of the station, and the platform of the station. A TV camera for photographing the situation of the home, a modulation means for modulating a video signal from the TV camera, a drive means for driving the light transmitter by the video signal modulated by the modulation means, Opposite the monitoring device provided in the front cab and rear cab of the train, and the center of the optical signal transmitted from the transmitter in a predetermined range in the lateral direction when the train stops at a fixed position of the platform And a driving means for demodulating an optical signal received by the light receiving unit and driving the monitor device, and a continuous multi-stage of the light transmitter. The light emitting element has an optical lens Characterized in that had a multiple-type the LED.
[0011]
As described above, a light transmitter is provided on the platform fence of the station, and the distance between the light transmitter and the light receiving unit is determined by transmitting the home-side image captured by the TV camera from the light transmitter to the train side. Can be shortened. For this reason, it is not necessary to provide a precise optical lens to the transmitter, and precise equipment adjustment is not required, and it is not affected by the weather conditions such as sunlight or fog, and the transmission of optical signals is always stable. Can be done.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an overall schematic configuration of an anti-train image transmission apparatus using an optical space transmission system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a system configuration in the embodiment. 1 and 2, a plurality of, for example, three color TV cameras (ITV cameras) 11a to 11c are installed on the platform 1 of the station by means such as hanging from the ceiling, and the front and center of the platform 1 and the train 2 are installed. Take a picture of the rear.
[0013]
Video signals photographed by the TV cameras 11a to 11c are input to a modulation device such as the FM modulation device 12, as shown in FIG. This FM modulation device 12 FM modulates the video signals photographed by the TV cameras 11a to 11c, combines them with 3CH signals, and inputs them to the LED driving device 13. As shown in FIG. 1, the LED driving device 13 is provided at the top of a home fence 14 installed in the home 1. In addition, a light transmitter composed of a plurality of light emitting elements, for example, an LED light transmitter 15 of a continuous multi-stage LED system, is provided in a horizontally long manner at the head portion of the home fence 14 on the side facing the train 2. The LED transmitter 15 is, for example, a 16-lens type without a lens, and the LED array is a double system.
[0014]
In addition, a light receiving unit 16 is disposed outside the top portion of the train 2 so as to be opposed to the central portion of the LED transmitter 15 when the train 2 stops at a specified position of the platform 1. The transmission range of the optical signal from the LED transmitter 15 to the light receiving unit 16 is set to about ± 500 mm, for example.
[0015]
As shown in FIG. 2, the light receiving unit 16 is integrally provided with the light receiving circuit in the light receiving device 17. The light receiving device 17 receives the optical signal from the LED light transmitter 15 by the light receiving unit 16 and converts it into a high frequency signal, and demodulates the 3-channel video signal by the demodulation circuit. The video signal demodulated by the light receiving device 17 is sent to a monitor device provided in the driver's seat of the train 2, for example, a triple LCD monitor device 18 and displayed.
[0016]
Next, the overall operation of the anti-train image transmission apparatus configured as described above will be described. When the train 2 stops at the specified position of the platform 1, the light receiving unit 16 provided at the top of the train 2 is in a state of facing the LED transmitter 15 provided on the platform fence 14. In this case, the LED transmitter 15 is formed in a horizontally long shape using a continuous multi-stage LED system, and the transmission range of the optical signal is set to a predetermined range, for example, a range of ± 500 mm, in a lateral direction with respect to a specified stop position. Therefore, even if the train 2 slightly deviates from the predetermined stop position, an optical signal can be transmitted without any problem.
[0017]
On the other hand, the TV cameras 11 a to 11 c installed in the home 1 take pictures of passengers in the front, center, and rear of the home 1 and the train 2. Video signals photographed by the TV cameras 11 a to 11 c are each FM-modulated by the FM modulation device 12, and three-channel signals are combined and sent to the LED driving device 13. The LED driving device 13 drives the LED light transmitter 15 based on the high frequency signal modulated by the FM modulation device 12, and transmits the light toward the light receiving unit 16 provided in the train 2. The light receiving device 17 installed in the train 2 receives the light signal transmitted from the LED light transmitter 15 by the light receiving unit 16 and converts it into a high frequency signal, and further demodulates it into a video signal of three channels, Is output to and displayed on a triple LCD monitor 18. Therefore, the driver of the train 2 can confirm the closing of the train door and the safety of the passengers on the platform 1 by monitoring the image displayed on the triple LCD monitor device 18, so that the train 2 can be safely and It can operate smoothly.
[0018]
(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the second embodiment, as shown in FIG. 3, two platforms 1a and 1b for up and down are provided at one station, and an up train 2a and a down train are provided between the two homes 1a and 1b. 2b shows a case where the vehicle travels in the direction indicated by the arrow and operates by turning back at the first and last stations.
[0019]
Each train 2a, 2b has a driver's seat at both ends, and a triple LCD monitor device 18 is provided in each of the driver's seats, and a light receiver 17 having a light receiver 16 on the left side of the driver's seat. Provided.
[0020]
Moreover, the LED light transmitter 15 is provided in the head part of the home fence 14 like the said 1st Embodiment in the two homes 1a and 1b. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.
[0021]
As described above, by arranging the triple LCD monitor device 18 in the driver seats at both ends of each train 2a, 2b, and by providing the light receiving device 17 having the light receiving portion 16 on the left side of the driver seat, An optical signal transmitted from the LED light transmitter 15 provided on the home fence 14 is received by the light receiving unit 16 provided at the head of the traveling direction of each train 2a, 2b, and gets on and off the triple LCD monitor device 18. The customer image is displayed.
[0022]
And even when each train 2a, 2b turns back at the terminal station, the optical signal transmitted from the LED light transmitter 15 installed in the platform fence 14 in the same way as in the above case is the traveling direction of each train 2a, 2b. Light is received by the light receiving unit 16 on the leading side, and an image of the passenger is displayed on the triple LCD monitor device 18.
[0023]
In addition, in the said 2nd Embodiment, although the case where the up train 2a and the down train 2b drive between two platforms 1a and 1b was shown, the up train 2a and the down train 2b run on the both sides of one home 1 Even in this case, an optical signal can be transmitted using the trains 2a and 2b having the system configuration shown in FIG.
[0024]
【The invention's effect】
As described above in detail, according to the present invention, a light transmitter is provided on the platform fence of the station, and the home-side image captured by the TV camera is transmitted from the light transmitter to the train side. The distance between the light receiving unit and the light receiving unit can be shortened, so that it is not necessary to provide a precise optical lens in the light transmitting device, and precise device adjustment is not necessary. In addition, since the distance between the light transmitter and the light receiving unit is short, the light signal can always be transmitted stably without being influenced by the influence of sunlight or weather conditions such as fog. Furthermore, even when the platform is curved or meandering, a light transmitter can be installed on the platform fence to reliably transmit an optical signal to the train side. Therefore, it is not necessary to install a plurality of light transmission devices, and the configuration can be made at low cost.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall schematic configuration of an anti-train image transmission apparatus using an optical space transmission system according to an embodiment of the present invention.
FIG. 2 is an exemplary block diagram showing a system configuration according to the embodiment;
FIG. 3 is a schematic configuration diagram of an anti-train image transmission apparatus according to a second embodiment of the present invention.
FIG. 4 is a configuration diagram showing an example in the case of transmitting a light beam from the rear of a vehicle in a conventional optical communication transmitter / receiver.
FIG. 5 is a configuration diagram showing an example in which a home is curved in a conventional optical communication transmitter / receiver.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Home 2 Train 2a Up train 2b Down train 11a-11c TV camera 12 FM modulator 13 LED drive device 14 Home fence 15 LED light transmitter 16 Light receiver 17 Light receiver 18 Triple LCD monitor device

Claims (2)

A light transmitter composed of continuous multi-stage light emitting elements provided horizontally in the horizontal direction on the train traveling side of the platform fence on the front side of the train traveling direction of the station, and a TV camera provided on the platform of the station for photographing the situation of the platform Modulation means for modulating the video signal from the TV camera, drive means for driving the light transmitter by the video signal modulated by the modulation means, a monitor device provided in the cab of the train, and a train When the vehicle stops at a fixed position of the platform, the light receiving part of the train installed opposite to the central part of the optical signal transmitted from the light transmitter in a lateral direction within a predetermined range, and the light received by the light receiving part Drive means for demodulating the optical signal from the light transmitter and driving the monitor device;
The train image transmission device according to claim 1 , wherein the continuous multi-stage light emitting element of the light transmitter is a multiple LED without an optical lens . A light transmitter composed of continuous multi-stage light emitting elements provided horizontally in the horizontal direction on the train traveling side of the platform fence on the front side of the train traveling direction of the station, and a TV camera provided on the platform of the station for photographing the situation of the platform And a modulation means for modulating the video signal from the TV camera, a drive means for driving the light transmitter by the video signal modulated by the modulation means, and a front cab and a rear cab of the train. Monitoring device and light reception at the front and rear of the train installed opposite to the central part of the optical signal transmitted in a predetermined range in the lateral direction from the light transmitter when the train stops at a fixed position of the platform And driving means for demodulating the optical signal received by the light receiving unit and driving the monitor device,
The train image transmission device according to claim 1 , wherein the continuous multi-stage light emitting element of the light transmitter is a multiple LED without an optical lens .

Images