JPH07141579A - Monitor device - Google Patents

Abstract

PURPOSE:To make a monitor device highly functional by facilitating the installation construction of the device which monitors many monitor points through images. CONSTITUTION:Plural television camera units 3 which each have a television monitor unit 2 and a microphone 12 internally are connected to one coaxial cable 1. When the unit number of a television camera unit 3 whose signal is to be received by the television monitor unit 2 is inputted, the unit signal is sent out to the one transmission line that the respective television camera units 3 share together with camera unit driving electric power. On the side of the television camera unit 3, the unit signal sent to the transmission line is separated from the camera unit driving electric power and further decoded; when the unit number matches the unit number of the unit, the separated camera unit driving electric power is applied to the television camera unit 3, which is driven to project its image on a television image receiver 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for monitoring a large number of monitoring points by images for crime prevention, operation of facilities, and maintenance management.

[0002]

2. Description of the Related Art Conventionally, in order to monitor equipment for crime prevention and operation / maintenance management, an industrial TV called ITV is often arranged at a monitoring point so that the status of the monitoring point is displayed on a television receiver. . As shown in FIG. 2, a signal switching device is provided in one receiver for a plurality of monitoring points,
There is a device in which a plurality of ITVs are radially connected to the switching device by individual signal lines, and a plurality of locations are monitored by appropriately switching them.

[0003]

However, when a plurality of ITVs are radially connected to a signal switching device to form a multipoint monitoring device, a transmission line such as a coaxial cable for transmitting a video signal is connected to the number of ITVs. It is necessary to route it only, and the amount of wiring is large, so wiring is troublesome. Further, if the number of monitoring points increases, it is necessary to provide a changeover switch correspondingly, and it is difficult to cope with expansion or the like. Furthermore, since it is not possible to monitor the sound of the monitor by ITV monitoring, it is necessary to install a microphone separately when the sound of the monitor is required.

In view of the above points, the present invention provides a monitoring device which has a single transmission line for facilitating facility construction and is capable of monitoring voice as well to achieve high functionality. To aim.

[0005]

In order to achieve the above object, the present invention connects a plurality of TV camera units each having a built-in microphone and a TV monitor unit having a TV receiver by a single transmission line. , The TV monitor unit has a unit number input section that specifies the TV camera unit to be received and a unit signal generation section that sends the specified unit number to the transmission line, while each TV camera unit is unique to each unit. A unit number setting unit for setting a number is provided, and a unit signal separating unit for separating a unit signal representing the unit number from various signals sent to the transmission line and a unit number for decoding from the unit signal separated by the unit signal separating unit If it matches your own unit number, your own TV camera unit Ri is obtained by a unit number decryption unit to start sending the transmission line audio video signal.

[0006]

According to the present invention, the unit number unique to each unit is input and set in advance in the unit number setting section of the television camera unit with a built-in microphone which is arranged facing the monitoring location.

When the unit number of the TV camera unit to be received on the TV monitor unit side is input from the unit number input section, a unit signal corresponding to the input unit number is generated by the unit signal generation section, and the unit signal is output. It is sent to one transmission line shared by each TV camera unit together with the camera unit driving power for driving the TV camera unit.

On the television camera unit side, the unit signal separating unit separates the unit signal transmitted to the transmission line from the camera unit driving power, and the unit number decoding unit decodes the unit signal to determine its unit number. If it coincides with, the separated camera unit driving power is applied to the TV camera unit to activate the TV camera unit. When the designated TV camera unit is activated, the video and audio of the monitoring point captured by the unit can be monitored by the TV receiver of the TV monitor unit.

In this way, by inputting the designated TV camera unit to the television monitor unit, the designated unit is selected from a plurality of television camera units connected to one transmission line, and the video and audio are displayed on the television monitor unit. And can be monitored.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic block diagram of a monitoring apparatus of the present invention, in which a television monitor unit 2 for receiving and outputting audio and video signals is provided at one end of a coaxial cable 1 which is a transmission line.
(Hereinafter referred to as "monitor-unit") is connected,
To the other end, a plurality of TV camera units 3 (hereinafter referred to as “camera units”) that capture the audio and video of the monitoring location and send them to the monitor unit side are connected.

These constituent units will be described in more detail. First, the monitor unit 2
And a power supply unit 4 for driving the camera unit 3, a unit number input unit 5 for inputting a unit number of the camera unit 3 described later, and a unit signal generation unit 6 for converting the input unit number into a unit signal. , And these are connected to the modulator 7 and modulated together with the carrier wave. The modulator 7 is connected to the coaxial cable 1 via a high pass filter 8. Further, a television receiver 9 that outputs audio and video is connected to the high-pass filter 8.

Next, a plurality of camera units 3 are connected to one coaxial cable 1 each having a unique unit number so as to correspond to the number of monitoring points. One of them will be described as an example. Then, the camera unit 3 is equipped with a television camera 10 for capturing an image of a monitoring location, and a CCD image pickup device is used for the television camera 10 in terms of cost and stability. Then, the TV camera 10 sends the video signal to V
It is connected to an RF modulator 11 that modulates the RF band of 1-channel or 2-channel of HF.

A microphone 12 for capturing voice is also provided, and the microphone 12 is connected to the RF modulator 11 via a microphone amplifier 13 like a camera.
The RF modulator 11 is connected to the coaxial cable 1 via the high-pass filter 14.

Further, the camera unit 3 is provided with a unit number setting section 15 for inputting and setting a unit number which is a unique number for identifying each unit, and a low frequency range for taking in a control signal in the vicinity of 6 MHz from the coaxial cable 1. A filter 16 and a unit signal separating section 1 for separating a unit signal indicating a unit number from the control signal taken in.
7 and a unit number decoding unit 18 that operates the RF modulator 11 by decoding the unit number from the separated unit signal.

However, when the monitor unit 2 receives audio and video at the monitoring location, a unique unit number is assigned to each camera unit 3 in advance,
This assigned unit number is input and set as its own unit number via the unit number setting unit 15 of each camera unit 3.

Then, when the unique unit number assigned to the camera unit 3 at the place to be monitored is input to the unit number input unit 5 of the monitor unit 2, the unit signal generation unit 6 outputs the unit signal corresponding to the input unit number. Occur. This unit signal is modulated by the carrier wave of 6 MHz in the modulator 7 and superposed with the power wave sent from the power source 4, passed through the high-pass filter 8 and sent to the coaxial cable 1.

On the side of the camera unit 3 connected to the coaxial cable 1, when the transmitted power wave and unit signal are taken in through the low-pass filter 16, the unit signal separation section 17 first separates the unit signal and the power wave. . The unit number of the separated unit signal is further reproduced by the unit number decoding unit 18, and when the unit number is compared with the preset own unit number, the start signal is sent to the RF modulator 1
Send to 1.

The RF modulator 11 receiving the start signal generates an RF signal of 91 MHz or 97 MHz from the video and audio signals sent from the television camera 10 and the microphone 12, and sends it to the coaxial cable 1 through the high-pass filter 14.

Then, the monitor unit 2 receives the RF signal transmitted from the designated camera unit 3, sends it to the television receiver 9 through the high-pass filter 8, and reproduces the image and sound of the monitored portion designated by the television receiver 9. To do.

[0021]

As described above, according to the present invention, the television monitor unit 2 and the plurality of television camera units 3 are connected to one coaxial cable 1, and the television monitor unit 2 is desired to receive. When the unit number is input, the TV camera unit 3 collates the unit number with its own unit number, and if they match, the video and audio are transmitted, so that the TV monitor unit 2 can arbitrarily select from a plurality of monitoring points. In addition to being able to specify the video and audio of the monitoring point, you do not have to wire around the number of cameras as in the past, you can reduce the amount of wiring and at the same time you do not have to worry about wiring, facility construction It will be extremely easy. In addition, the voice can be captured at the same time, and the function as a monitoring device can be enhanced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a monitoring device of the present invention.

FIG. 2 is a schematic configuration diagram showing a conventional monitoring device.

[Explanation of sign]

1 ... Coaxial cable (transmission line) 2 ... TV monitor unit 3 ... TV camera unit 5 ... Unit number input section 6 ... Unit signal generating section 9 ... TV receiver 10 ... TV camera 12 ... Microphone 15 ... Unit number setting section 17 ... Unit signal separation unit 18 ... Unit number decoding unit

Claims (1)

[Claims] 1. A plurality of TV camera units having a built-in microphone and a TV monitor unit having a TV receiver are connected by one transmission line, and the TV camera unit to be received is designated as the TV monitor unit. While each unit has a unit number input section and a unit signal generator that sends the specified unit number to the transmission line, each TV camera unit has a unit number setting section that sets a unique number for each unit and sends it to the transmission line. A unit signal separating unit that separates a unit signal representing a unit number from various signals that are generated, and when the unit number is decoded from the unit signal separated by the unit signal separating unit and matches the unit number of the unit Unit number to start sending audio / video signal to transmission line Monitoring apparatus being characterized in that a 読部.