JPS60260276A - Supervisory equipment - Google Patents

Abstract

PURPOSE:To widen the supervisory area and to attain transmission without any repeater by transmitting a control signal of a drive system through an optical fiber with multiplexing in a supervisory equipment of remote control. CONSTITUTION:A multiplexer 13 of a transmission section 1 inputs a clock signal, applies frequency division to obtain a modulation signal (d) of the 1st switch group 10 and the 2nd switch group 11. On the other hand, the rise timing of the modulation signal (d) is detected by a multiplex separating circuit 32 of a drive section 3, a reception timing pulse T is reproduced and the rise of a reception timing pulse T applies sampling and holding to the modulation signal (d) to reproduce a serial signal. Moreover, after the frame synchronism is established, the original parallel signal is reproduced to control a driver group 34. An on/ off signal of a decoder 33 brings any of the driver group 34 into the operating mode and an output of a supervisory camera group 35 is switched to display it on a monitor receiver 42.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a remote control monitoring device.

Conventional Configuration and Problems Therein As shown in FIG. 1, a television camera for remote control uses a motor to control movement in the horizontal direction a, vertical direction, zoom C, focal point d, etc.

As shown in Figure 2, conventional monitoring equipment guides the control signal of the drive circuit to an operation switch via a control cable, controls the operation of the drive system by turning the switch on and off, and transmits the video signal of the camera via a coaxial cable. It is transmitted and monitored using a monitor receiver. Therefore, when the control cable is multi-core, and the control cable is long, a voltage drop occurs in the cable, causing the drive system to malfunction or become uncontrollable. As a means to prevent this effect, ■Limit the length of the cable. ■Increase the cross-sectional area of the cable. ■Measures such as installing a repeater were required, which caused an increase in costs.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a monitoring device that can expand the monitoring area by multiplexing drive system control signals and transmitting them through optical fibers, and also allows non-relay transmission.

Structure of the Invention As shown in FIG.
T, HIGHT), vertical direction (U P j DOWN
), zoom (WIDE/position E), focus (NEAR-FA)
R), a second switch group 11 that issues a channel selection command, a Korg 12 that converts the output of the second switch group into a binary code, and a switch group 10 and a Korg 12 that control the A transmission section 1 includes a multiplexer 13 that converts outputs into parallel and serial signals, a first electrical/optical signal converter (hereinafter abbreviated as E10 converter) 14 that converts a serial signal into an optical signal, and a transmission line. A first optical/electrical signal converter (hereinafter abbreviated as 07E converter) 31 that is connected to the first E10 converter 14 via the optical fibers 2 and 2' and the optical fiber 2 and converts an optical signal into an electrical signal. , a demultiplexer 32 that converts the serial signal output from the first 0/E converter 31 into the original parallel signal, and a decoder 33 that reproduces the channel selection command signal converted into a binary code. The output of the demultiplexer 32 is the horizontal, vertical, zoom, and focus parallel signals and the output signal of the decoder 33 (from chl to c
h4) is inputted, and a driver group 34 drives and controls the camera with the specified channel, and has horizontal, vertical, zoom, and focus drive systems, and performs predetermined operations under control from the driver group 34. Surveillance camera group 3 that outputs video signals
6, a channel selector 36 which inputs the video signal of the surveillance camera group 35 and selects an arbitrary channel according to the output signal of the decoder 33, and a second E10 converter which converts the output video signal of the channel selector 36 into an optical signal. 37
a second E via an optical fiber 2';
The receiving section 4 includes a second O/E converter 41 that is connected to the No. 10 converter 37 and converts an optical signal into an electrical signal, and a monitor receiver 42 .

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 4, the multiplexer 13 of the transmitter 1 inputs the clock signal and divides the frequency into Q, respectively.

Q 2 r 03 r 04 + 05 r 06 ,
A frequency divider circuit 131 that generates Q7, and Q3. Q4. Q
6I06. Parallel/serial conversion circuit 132 which inputs Q7, samples inputs D1 to D16 based on the logic conditions shown in Table 1, and sequentially converts them into the serial signal C shown in FIG.
A pulse generating circuit 1 inputs Ql and Q2 and outputs different pulses a and b with the same period as shown in FIG.
33, serial signal C and pulses a and b are input to the seventh
As shown in the figure, the serial signal switches pulse a during the logic 0 period and pulse b during the logic 1 period and outputs the modulated signal d.
It consists of a pulse width modulation circuit 134 that obtains the following.

Table 1 below: The Korg 12 converts the states of the second switch group 11 into binary codes C1 and C2 shown in Table 2.

On the other hand, as shown in FIG. 8, the multiplexing and demultiplexing circuit 32 of the drive unit 3 detects the rising timing of the modulated signal d' and regenerates the reception timing pulse T. By sampling and holding C', the serial number C' is reproduced. Furthermore, after establishing frame synchronization, the drive type group 34 is controlled by regenerating ``+6'' back to the original parallel signal.The decoder 33 outputs the third
As shown in the table, channels from chl to ch4 are turned on and off, and at the same time one of the drive type groups 34 is set to the operation mode by these on/off signals, the video signal from the surveillance camera group 35 is input. The output of the selector 36 is changed and the image is displayed on the monitor receiver 42 of the receiver 4. I Table 2 Table 3 Effects of the Invention According to the present invention, control signals of a surveillance camera such as horizontal, vertical, zoom, focus, etc. and a coded channel selection command signal are multiplexed and transmitted through an optical fiber. In addition, by converting video signals from surveillance cameras into optical signals with different wavelengths and multiplexing them, the receiving section It is also possible to display and monitor images from each surveillance camera at the same time. If the system is designed with expansion of the system in mind in advance, it can be easily realized by simply adding a driver and a surveillance camera, which is highly effective in terms of economy.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the operation of the drive system of a surveillance camera, Fig. 2 is a block diagram showing a conventional example of a monitoring device, Fig. 3 is a block diagram of the present invention, Figs. 4, 5, and 6. , FIG. 7, and FIG. 8 are a block diagram and a time chart showing an embodiment of the present invention. 1... Transmission section, 2 and 2'... Optical fiber, 3... Drive section, 4... Receiving section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4

Claims (1)

[Claims] A first switch group that adjusts horizontal, vertical, zoom, and focus, a second switch group that selects a channel, a KOG that encodes a channel selection command signal, and a CORG that encodes the first switch group and a KOG output signal. A transmitter includes a multiplexer that performs parallel/serial conversion, a first electrical/optical signal converter that converts the multiplexer output signal into an optical signal, and an electrical/optical signal of the transmitter via the first optical fiber. a first optical/electrical signal converter that is connected to the signal converter and converts an optical signal into an electrical signal;
a demultiplexer that converts the output of the optical/electrical signal converter into serial/parallel, a decoder that decodes the encoded channel selection command signal, and a signal from the parallelized first switch group and the decoder output. A group of drivers for driving a channel for which a selection command has been given, a group for surveillance cameras consisting of a drive system and a camera, and a channel selector for selecting an image of a channel for which a selection command has been given based on the video signal and decoder output of each surveillance camera. A drive section consisting of a second electrical/optical signal converter that converts the output signal of the channel selector into an optical signal, and an optical signal connected to the second electrical/optical signal converter of the drive section via a second optical fiber. The second converts the signal into an electrical signal
1. A monitoring device comprising: a second optical/electrical signal converter; and a receiving section, such as a monitor receiver, which displays a video signal output from the second optical/electrical signal converter.