JP3009386B2 - Remote centralized monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image of a station platform imaged by an ITV camera installed in a station platform and an image of an in-car image captured by an ITV camera installed in a vehicle on a train cab. The present invention relates to a remote centralized monitoring device for monitoring.

[0002]

2. Description of the Related Art Conventionally, in a transportation system such as a railway running on a track, in order to ensure smooth train operation and safety, when a train stops at a station platform, the status of the station platform is determined by an I-state.
Images are taken by a TV camera, converted into optical signals, transmitted to the train side, and displayed on a monitor TV provided on the train cab so that the driver can monitor the status of passengers.

[0003] On the other hand, on the train side, IT
A V-camera is installed to capture an image of the situation inside the vehicle, and the captured signal is transmitted to the driver's cab and displayed on a monitor TV so that the driver can monitor the situation inside the vehicle.

As described above, conventionally, a home monitoring device for transmitting a video signal received by a light receiver to a driver's cab and monitoring the same, and a video signal captured by an ITV camera installed in the vehicle to the driver's cab. An in-vehicle monitoring device for transmission and monitoring is provided separately.

[0005]

In the above-mentioned conventional monitoring apparatus, an image is picked up by a coaxial cable for transmitting a high-frequency signal from a station platform received by a light receiver to a driver's cab and an ITV camera installed in the vehicle. Coaxial cables for transmitting the video signals to the driver's cab are required for the number of ITV cameras, and there is a problem that the space for laying the cables is increased and the equipment cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and comprises one video signal from a station platform received by a photodetector and one video signal captured by an ITV camera installed in a vehicle. It is an object of the present invention to provide a remote centralized monitoring device which can transmit data to a driver's cab through an in-vehicle transmission line, can reduce the space for laying cables, and can be configured at low cost.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a remote centralized monitoring device for remotely monitoring the status of each vehicle and a station platform at a train cab, and for capturing an image of the status of the station platform.
A TV camera, a modulator that converts a video signal captured by the ITV camera into a high-frequency signal, a transmitter that converts the high-frequency signal converted by the modulator into an optical signal, and transmits the optical signal to the train side; A light receiver provided on the train side for receiving an optical signal sent from the light transmitter and converting it to a high-frequency electric signal; a signal amplifier for amplifying the high-frequency signal output from the light receiver; and the signal amplifier An in-vehicle transmission line for transmitting the signal amplified by the above to the leading vehicle, an ITV camera for imaging the situation in each vehicle, and converting a video signal captured by the ITV camera into a high-frequency signal,
A modulator in which a different frequency channel is set for each ITV camera; a synthesizer for synthesizing a high-frequency signal converted by the modulator with a transmission signal on the in-vehicle transmission line;
A demodulator that demodulates a high-frequency signal transmitted to the leading vehicle by the in-vehicle transmission path and converts the signal into a video signal; and an operating device that sets an arbitrary frequency channel for the demodulator,
A monitor TV for displaying an image of a corresponding vehicle or station platform based on an image signal corresponding to the arbitrary frequency channel set by the operation device.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a system configuration example of a remote centralized monitoring apparatus according to an embodiment of the present invention, and FIG. 2 is a functional block diagram in the embodiment. In FIG. 1, reference numeral 1 denotes a track on which a train 3 including a plurality of vehicles 2 runs.

The station platform (not shown) is provided with an ITV camera 4 for imaging the situation of the station platform, for example, the state of passengers on the train 3 stopped at the station platform. A video signal picked up by the ITV camera 4 is modulated by a modulator 5 and is transmitted by a light transmitter 6 to an optical signal such as an infrared ray 7.
And transmitted to the train 3 side. The light transmitter 6 includes:
For example, it is provided so as to be located behind the train 3 stopped at the station platform.

[0011] Further, the rearmost vehicle 2 of the train 3 includes:
A light receiver 8 is provided so as to face the light transmitter 6.
The light receiver 8 is provided with an infrared ray 7 transmitted from the light transmitter 6.
And converts it into an electric signal (high-frequency signal). The electric signal output from the light receiver 8 is amplified by a signal amplifier 9 and transmitted to the leading vehicle 2 via an in-vehicle transmission line 10 such as a coaxial cable. In this case, the in-vehicle transmission line 10 is provided with synthesizers 11a, 11b,..., 11n for each vehicle, and these synthesizers 11a, 11b,. , 12b,
, 12n are connected via modulators 13a, 13b, ..., 13n.

That is, each ITV camera 12a, 12
, 12n captures an image of the situation inside each vehicle 2 and the video signals are modulated by modulators 13a, 13b,. 10 and transmitted to the leading vehicle 2. In this case, the modulators 13a, 13b,.
Are ITV cameras 12a, 12b, as shown in FIG.
.., 12n are modulated into signals of different frequency channels from the station platform image.

The leading vehicle 2 is provided with a demodulator 14, a monitor TV 15, and an operation device 16. The demodulator 14
The input signal is selected and demodulated according to the operation of the operation device 16,
The demodulated signal is output to the monitor TV 15,
For example, it is configured as shown in FIG.

That is, the demodulator 1 is controlled by the in-vehicle transmission line 10.
4 is input to a tuner 21, and a channel selection signal from the operating device 16 is transmitted to a CPU 22.
Is input to The CPU 22 controls the oscillation frequency of the PLL circuit 23 according to the channel selection signal of the operation device 16. The output signal of the PLL circuit 23 is
4 and is input to the tuner 21 as a local oscillation signal. The tuner 21 includes a filter 24 from the PLL circuit 23.
A predetermined frequency channel is selected in accordance with a signal input through the interface, converted into an intermediate frequency signal IF, and output. This intermediate frequency signal IF is input to a demodulation unit (V-IF unit) 25, and an audio signal and a video signal are demodulated. The audio signal and the video signal demodulated by the demodulation unit 25 are amplified by amplifiers 26 and 27, respectively, and sent to the monitor TV 15.

In the above configuration, the ITV camera 4 provided at the station platform as shown in FIGS. 1 and 2 captures the situation of the station platform and outputs the video signal to the modulator 5. The modulator 5 modulates the image of the station platform taken by the ITV camera 4 into a signal of a predetermined channel, and converts the image into a signal of an infrared ray 7 by a light transmitter 6 and transmits the infrared ray 7. Therefore, when the train 3 enters the platform, the light receiver 8 provided at the rearmost part of the train 3 can receive the infrared ray 7 transmitted from the light transmitter 6 on the station platform side.

When the light receiver 8 receives the infrared ray 7 sent from the light transmitter 6 on the station platform side, it converts it into an electric signal (high-frequency signal) and outputs it to the signal amplifier 9. The signal amplifier 9 amplifies a high-frequency signal output from the light receiver 8, that is, a station platform video signal. The station platform video signal amplified by the signal amplifier 9 is transmitted to the demodulator 14 provided in the leading vehicle 2 via the in-vehicle transmission line 10.

On the other hand, the situation inside the vehicle 2 is imaged by the ITV cameras 12a, 12b,..., 12n, and the video signals are respectively modulated by the modulators 13a, 13n.
As described above, b,..., 13n are modulated into video signals of a channel different from the station platform video. The in-vehicle video signal modulated by these modulators 13a, 13b,..., 13n is mixed with other signals on the in-vehicle transmission line 10, that is, the station platform video signal via the combiners 11a, 11b,. , Demodulator 1 provided in leading vehicle 2
4 is transmitted.

At this time, when the driver operates the operation unit 16 to specify a desired channel, the video signal of the specified channel is demodulated by the demodulator 14 and the monitor TV 15
Will be displayed. Accordingly, the driver operates the operation device 16 to specify a channel, thereby obtaining an image of the station platform,
Alternatively, each in-vehicle image can be arbitrarily selected and displayed on the monitor TV 15. Thereby, the driver can monitor the status of the station platform and the passengers in the vehicle, and can operate the train 3 smoothly and safely.

[0019]

As described above, according to the present invention, one in-vehicle transmission line is provided in a train, and a video signal sent from a station platform is transmitted through the in-vehicle transmission line.
The in-vehicle image signal from the ITV camera provided for each vehicle is converted into a signal on a channel different from the station platform image,
Each is input to the above-mentioned in-vehicle transmission line via the synthesizer, synthesized with other video signals and transmitted to the modulator of the driver's cab, and a plurality of video signals input to these demodulators are selected by operating the operation device. Demodulated and displayed on the monitor TV, so that the video signal of the station platform and the video signal captured by the ITV camera installed in the vehicle can be transmitted to the driver's cab through a single in-vehicle transmission line, and the cable is laid. Space can be reduced and can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a remote centralized monitoring apparatus according to an embodiment of the present invention.

FIG. 2 is a functional block diagram according to the embodiment;

FIG. 3 is a block diagram showing a configuration of a demodulator according to the embodiment.

FIG. 4 is an exemplary view showing a frequency distribution of channel allocation in the embodiment.

[Explanation of symbols]

 Reference Signs List 1 track 2 vehicle 3 train 4 ITV camera 5 modulator 6 light transmitter 7 infrared ray 8 light receiver 9 signal amplifier 10 in-car transmission line 11a, 11b, ..., 11n combiner 12a, 12b, ..., 12n ITV camera 13a 13b,..., 13n modulator 14 demodulator 15 monitor TV 16 operating device

Claims (1)

(57) [Claims] 1. A remote centralized monitoring device for remotely and centrally monitoring the status of each vehicle and a station platform in a train cab, an ITV camera for imaging the status of the station platform,
A modulator that converts a video signal captured by a camera into a high-frequency signal, a light transmitter that converts the high-frequency signal converted by the modulator into an optical signal and transmits the optical signal to the train side, provided on the train side, A light receiver that receives the optical signal sent from the light transmitter and converts it into a high-frequency electric signal, a signal amplifier that amplifies the high-frequency signal output from the light receiver, and a signal that is amplified by the signal amplifier. An in-vehicle transmission path for transmitting to the leading vehicle, an ITV camera for imaging the situation in each vehicle, and an ITV
A modulator that converts a video signal captured by a camera into a high-frequency signal and sets a different frequency channel for each ITV camera, and combines the high-frequency signal converted by the modulator with the transmission signal on the in-vehicle transmission line. A demodulator that demodulates and converts a high-frequency signal transmitted to the leading vehicle through the above-mentioned in-vehicle transmission line into a video signal, and an operating device that sets an arbitrary frequency channel for the demodulator
A remote centralized monitoring device comprising: a monitor TV for displaying an image of a corresponding vehicle or station platform based on an image signal corresponding to the arbitrary frequency channel set by the operation device.