JPH06178301A - Video monitor system - Google Patents

Abstract

PURPOSE:To improve mounting/equipment use efficiency and monitor efficiency by permitting CPU in a center device to designate the channels of plural group terminal equipment groups in the blow band transmission lines of plural systems, to supply demodulation frequency data and to display a division video signal. CONSTITUTION:CPU 20 in the center device of the video monitor system of a monitor/maintenance system which is centralizedly controlled designates the channels of the same demodulation frequencies of plural terminal equipment groups in the blow band transmission lines L1-Lq based on a designation signal from a control panel 26 or an alarm signal from an alarm reception panel 28 and supplies corresponding demodulation frequency data to demodulation DM1-DMq through RF MODEM M1-Mq. Thus, a video monitor system where divided pictures are collectively displayed in corresponding picture display means IP1-IPq and mounting/equipment use efficiency and monitor efficiency are improved is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video surveillance system for transmitting signals such as video, audio and surveillance using multi-channel multi-channel transmission lines in which a plurality of frequencies are multiplexed.

[0002]

2. Description of the Related Art Conventionally, there is a monitoring and security system in which a large number of television cameras are installed at a large number of places in a high-rise building and the control center collectively monitors them. In this system, the video signal picked up by each TV camera is transmitted to each television receiver in the center by each signal line,
Further, a control signal for controlling the angle of each TV camera is transmitted to each terminal device in which the TV camera is installed by each control signal line.

[0003]

For this reason, the number of signal lines between the terminal and the center and the number of television cameras increase, which has been a problem in terms of equipment utilization and mounting. There is no such thing as displaying images of related monitoring points collectively,
There is a problem of inefficient centralized monitoring. In addition, even in a monitoring system in the event of an emergency such as a fire or gas leak, each ignition sensor is installed at each monitoring location, and the ignition sensor and the center are connected by a signal line. Only the firing position is calculated by the system, and a system that organically combines firing detection and video monitoring is known so that the firing location can be monitored by video in conjunction with the signal output by the firing sensor. Has not been done.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object thereof is a video surveillance system having a high efficiency of mounting and equipment utilization and a high efficiency of centralized surveillance, and a surveillance required state such as ignition. Is to realize a video surveillance system that organically combines the detection of video and video surveillance.

[0005]

According to the first aspect of the present invention, in a video surveillance system using a frequency-multiplexed broadband transmission line, a plurality of broadband transmission lines and signals of the broadband transmission lines are received, and a designated channel is received. A plurality of demodulators for demodulating the video signals of the above, a plurality of image display means for displaying the signals of the plurality of channels on the divided divided screens based on the video signals of the plurality of channels demodulated by the demodulator, and the demodulators In addition, the frequency data of the carrier wave for demodulation is grouped into a channel designating unit that sequentially sets the frequency data that is sequentially set by the channel designating unit into a channel group that is simultaneously displayed by the display unit, and a stored data storage unit, And a video signal picked up by the image pickup device at each terminal of each broadband transmission line. A transmitting terminal apparatus transmitting to the designated channel, in that it consists characterized.

Further, the second invention is installed in the above-mentioned system at a place where each transmission terminal device is installed, and when an urgent monitoring such as ignition, gas leak, alarm, or emergency contact is required, urgent monitoring is required. The emergency signal transmission device that outputs a signal, the signal line that transmits the emergency monitoring signal output from the emergency signal transmission device to the center, and if the emergency monitoring signal is input from the signal line, identify the monitoring required position Monitoring position specifying means for
When an urgent monitoring required signal is input from the signal line, the sequential display by the display means is stopped and only the video signal transmitted from the terminal installed at the monitoring required position specified by the monitoring required position specifying means And an emergency display control means for displaying on the display device.

[0007]

In this system, a plurality of frequency multiplex broadband transmission lines are provided. A plurality of transmission terminal devices are connected to each of the broadband transmission paths. Each transmitting terminal device transmits the video signal imaged at the installation location to each predetermined channel. At the center, a demodulator for extracting video signals of arbitrary channels of a plurality of broadband transmission lines is arranged. The demodulator, by the channel designating means, on the basis of the frequency data of the channel group stored in the data storage means by group, sequentially,
Frequency data of the carrier wave of the demodulation channel is set. Then, the demodulator generates a carrier wave according to the set frequency data, demodulates the video signal of the channel, and groups the video signal of one group of channels into each divided screen of the display means. indicate. A group of images to be monitored are simultaneously displayed on the partition screen of the display means, and the images are sequentially switched for each group and displayed on the display means. Therefore, it is possible to monitor images in a large number of places for each group at the same time, which is convenient in use.

In addition, an emergency signal transmitting device for outputting an emergency monitoring signal when emergency monitoring such as ignition, gas leak, alarm, emergency contact, etc. is required is installed at each place. The emergency monitoring signals to be output are collected at the center and the monitoring required position is specified. Then, the video signal sent from the transmission terminal transmitting device installed at the specified monitoring required position is demodulated, and only the video is fixedly displayed on the image display device. Therefore, when an urgent monitoring required state is detected, the image of the place can be confirmed promptly, thereby making it possible to confirm the emergency state, for example, the state of fire occurrence.

[0009]

According to the present invention, in a terminal connected to a frequency multiplexing broadband transmission line of a plurality of systems, a transmission terminal device for transmitting a video signal to each channel and each demodulator are provided in the transmission line of each system. Frequency data of carrier waves of channels to be demodulated are sequentially set in the demodulator, and each demodulated video signal output from each demodulator is displayed on each divided screen of the image plane. Another aspect of the present invention is that, in the above-described normal-time video surveillance, when an emergency surveillance state is detected, a surveillance location is specified, and a transmission terminal device installed at the surveillance location is transmitted. In this system, only the video signal that is displayed is fixedly displayed on the display means. Therefore, it becomes possible to sequentially monitor the images of a large number of places on a small number of display screens, and the facility utilization rate improves. Further, there is an effect that it is possible to promptly confirm the state of the monitoring required position where the emergency monitoring state has occurred.

[0010]

EXAMPLES The present invention will be described below based on a specific example. 1. Overall system configuration

FIG. 1 is a diagram showing the overall configuration of this system. Each monitoring location is classified by system and q-system coaxial cables L1 to Lq are provided. Explaining the system L1, the coaxial cable 1 is connected to n transmission terminal devices E1 _{1,1 to} E1 _{j, 4} via branching devices B1 to Bn. The transmitting terminal device has four related monitoring points
It is divided into groups and is divided into j groups as a whole. The general symbol Em _{k, i} attached to the transmitting terminal is
m is the strain number, k is the group number, and i is the group number. Therefore, n = 4 × j. Further, a central device 2 for centralized monitoring is connected to the coaxial cable 1 via a branching device B0.

The coaxial cable 1 has (n + 1) channels ch0 to
Can transmit chn frequency-multiplexed signals. Each channel is 6MHz so that the television video signal can be transmitted.
It is composed of. One of the (n + 1) channels, ch0, is the control channel for transmitting the operation command data from the center device 2 to each transmitting terminal device, and the other n
The channel is a video channel for transmitting a video signal from the transmission terminal device to the center device 2. One transmitting terminal device is assigned to each of the video channels. That is, the channels ch1 to chn are sequentially assigned to the transmission terminal devices E1 _{1,1 to} E1 _{j, 4} , respectively.

The system having the above configuration is provided in q systems, and the center device 2 is connected to the q system coaxial cable. Also, in the area monitored by each transmission terminal device, an emergency signal transmission device A1 _{1,1,1 to} Aq _{j, 4, r} for transmitting an emergency signal such as ignition, gas leak, alarm, emergency contact, etc. is installed. Has been done. Common symbol Am for emergency signal transmitter
_{k, i, s} , m is systematic number, k is group number, i is group number, s
Is the number of the emergency transmission device belonging to one transmission terminal device. Therefore, the transmitting terminal device is specified by (m, k, i), and the emergency signal transmitting device in the transmitting terminal device is specified by s.

2. Configuration of Center Device As shown in FIG. 2, the center device 2 outputs command data for controlling each transmission terminal device in accordance with an operation state of the control panel 26 by an operator's operation and each transmission terminal. TV receivers TV1 to TV based on the video signal transmitted from the device
It has a CPU 20 for controlling the image controllers IP1 to IPq for displaying images on q. The control panel 26 is operated by an operator to remotely operate each transmission terminal device, and includes a designated switch of the transmission terminal device desired to receive the video signal, a power switch of the television camera of the transmission terminal device, and a television camera. The vertical and horizontal angle adjustment sticks, the illumination switch, the zoom switch, the focus adjustment switch, and the like are provided. The operating state of the control panel 26 is read by the CPU 20 via the input / output interface 25.

Emergency signal transmitters A1 _{1,1,1 to} Aq _{j, 4, r} are installed at a number of places for monitoring images. For example, about 55 emergency signal transmitters (fire sensors, emergency call buttons, etc.) are provided on each floor of each building. The signal lines of the large number of emergency signal transmitters A1 _{1,1,1 to} Aq _{j, 4, r} are gathered in an alarm receiving board 28. From the large number of emergency signal transmitters A1 _{1,1,1 to} Aq _{j, 4, r} ,
An emergency monitoring signal is output when gas leaks or when the emergency call button is operated. The emergency monitoring signal is input to the interface 25 and read by the CPU 20.

In the ROM 21, an operation program of the CPU 20, a terminal correspondence table defining the correspondence between the numbers of the respective transmitting terminal devices, the system numbers, the group numbers, the channel numbers, and the frequency data of the carrier waves of the channels, A monitoring correspondence table is stored that defines the relationship between the number of each emergency monitoring signal and the number of the transmitting terminal device that displays the monitoring video when the emergency monitoring signal is received. The RAM 22 is for storing the operating state of the control panel 26 and other control states.

A data block having address data and command data for controlling each transmitting terminal device is a CP.
RF via U 20 via I / O interface 24
Output to modems M1 to Mq. The RF modems M1 to Mq modulate the carrier wave of the control channel ch0 of each system L1 to Lq based on the data block. Then, the modulated signal is output to the control channel ch0 of each transmission line 1 via the couplers Bc1 to Bcq of each system.

From each m-th transmission terminal device, the transmission path m
Video signals are being output to video channels ch1 to chn of. The video signal is received by the demodulator DMm of the center device 2 and demodulated for each channel ch1 to chn,
Output to image controller IPm. Image controller
The IPm controls the TV receiver TVm to divide one screen into four sections and display four images at the same time. The four videos displayed at the same time are videos captured by four transmission terminal devices belonging to each group. The CPU 20 sets, in the demodulator DMm, a set of frequency data of carriers of each group of channels which are simultaneously displayed on the m-th system m TV receiver TVm. Then, by setting the frequency data of the carrier waves of the four channels of each group at a predetermined time interval, the T-th signal of the m-th system is set.
On the V receiver TVm, four images are simultaneously and sequentially switched and displayed for each group at a predetermined time interval.

3. Configuration of transmitting terminal device

One transmitting terminal device E1 _{j, i} is constructed as shown in FIG. The signal of the control channel ch0 of the transmission line 1 is encoded by the RF modem 41 and read by the CPU 40 via the input / output interface 42. The CPU 40 has a ROM 43 storing the operation program, an RF
The data block input from the modem 41 is stored
RAM 44 is connected.

The CPU 40 also has an input / output interface 45.
A control signal is output to the camera control device 46 and the analog switch 47 via the. The camera control device 46 turns on / off the power switch of the television camera 48, turns on / off the illumination, drives the motors for vertical and horizontal angle adjustment, and drives the focus adjustment motor and the zoom motor according to the received command data. To do.

The video signal output from the television camera 48 is input to the modulator 49. The modulator 49 modulates a carrier wave of a predetermined channel based on the video signal and outputs the carrier wave to the analog switch 47. The analog switch 49 is normally in a signal passage blocking state. Then, when the transmission of the video signal from the transmission terminal device is requested by the center device 2, the CPU 40 which has decoded the command data output from the center device 2 causes the signal data to pass. As a result, the video signal is output from the transmission terminal device E1 _{j, i} to the channel of the transmission path 1.

4. Operation of Center Device Next, a processing procedure of system initialization by the CPU 20 of the center device 2 will be described with reference to FIG. In step 100, the address data of the transmitting terminal devices are determined in order to turn on all the transmitting terminal devices in order according to the terminal correspondence table shown in FIG. The address data is the number of the sending terminal device Em _{k, i} .
Created by (m, k, i). Next, command data for turning on the power is generated. Next, in step 102, when transmitting command data of the transmitting terminal device Em _{k, i} , it is determined whether or not a CD (carrier detection) signal is output from the RF modem Mm corresponding to the m-th system. Thus, it is determined whether or not the control channel ch0 of the m-th transmission path is empty. If it is empty, the process proceeds to step 106 and a data block including address data and power-on command data is output to the RF modem Mm. RF
When the data block is input, the modem Mm modulates the data block and then transmits the data block to the channel ch0 of the m-th transmission path.

Next, in step 108, it is judged whether the transmission to all the transmitting terminal devices is completed. If the data transmission to all the transmission terminal devices has not been completed, the process returns to step 100, and the data transmission to the next transmission terminal device is performed according to the terminal correspondence table of FIG. When the transmission of the data block to all the terminal transmitters is completed, step 110
Is executed.

In step 110, the group number k is initialized to 1. Next, in step 112, each system L1 to Lq
The four frequency data belonging to the k-th group are set in the demodulators DM1 to DMq of each system. The demodulators DM1 to DMq generate four carrier waves corresponding to four frequency data, demodulate the carrier waves, and then output the video signals to the image controllers IP1 to IPq. Each of the image controllers IP1 to IPq inputs four video signals, and receives each of the TV receivers TV1 to TV1.
The screen of q is divided into four and the image is displayed in each section.

Next, at step 114, the process waits for a predetermined video display time. As a result, the images transmitted from the four transmission terminal devices belonging to the k-th group of the 1st to mth systems are continuously supplied to the TV receivers TV1 to TVq of the respective systems for a predetermined image display time. Will be displayed. next,
In step 116, it is determined whether the group number k is equal to the final group number j, and if it is not equal to the final group number j,
After shifting to step 118, the group number is updated by 1, and the process returns to step 112 to execute the image display processing of the next group. If it is determined in step 116 that the group number K is equal to the final group number j, the process returns to step 110, the group number K is set to the initial value 1, and the image display processing is repeatedly executed. By this, each TV receiver TV1 ~ TV of each system
In q, four images are set as one group and the images of the group are sequentially and repeatedly displayed at predetermined time intervals. The monitor can monitor all the locations where the terminal transmission device is installed by monitoring the images of these TV receivers TV1 to TVq.

On the other hand, when it is desired to identify a certain transmission terminal device and change the image pickup angle, magnification, etc. of the television camera, the processing procedure of FIG. 5 is executed. The processing procedure of FIG.
When the adjustment switch of the control panel 26 is operated, it is activated by an interrupt to the program shown in FIG.
In step 200, the number of the transmitting terminal device to be remotely operated and the state of each switch for remote operation set in the control panel 26 are read. Then step 202
At, the address data for specifying the transmitting terminal device is created from the designated transmitting terminal device number and the terminal correspondence table of FIG. Further, in the control panel 26, the power switch of the television camera 48 of the transmission terminal device is turned on / off, the vertical and horizontal angle adjusting stick of the television camera is operated, the illumination switch is turned on / off, the zoom switch is turned on / off, and the focus adjustment switch is turned on. Command data having corresponding bits of "1" or "0" is created corresponding to the on / off state.

Next, at step 204, it is judged whether or not the CD (carrier detection) signal is output from the RF modem of the specified system to determine whether or not the control channel ch0 of the system is empty. To be judged. If it is empty, the routine proceeds to step 206, where a data block consisting of address data and command data is output to the RF modem corresponding to the system number to which the designated transmitting terminal device belongs.
The RF modem receives the data block, modulates it, and then sends the data block to channel ch0 of the transmission path of the specified system.

Next, in step 208, the frequency data of the channel to which the designated transmission terminal device belongs is set in the demodulator DMm of the corresponding system, and the image controller IPm
The control data for full-screen display is set in. As a result, the video image sent from the designated transmission terminal device is displayed on the entire screen of the TV receiver TVm of the corresponding system. The program of FIG. 5 is repeatedly executed while the adjustment switch of the control panel 26 is on. Therefore, while the adjustment switch of the control panel 26 is on, while confirming the image transmitted from the television camera, the television camera is remotely operated by various switches of the control panel 26, operation sticks, etc. The image transmitted by the TV camera can be adjusted.

On the other hand, the CPU 20 executes the program shown in FIG. 6 at predetermined time intervals at the highest priority level. In step 300, the input signal levels from all emergency signaling devices are read. In the next step 302, it is determined whether or not there is a signal level of L level (emergency required monitoring signal). The emergency signal transmitter transmits an H level signal, and outputs an L level emergency monitoring signal when an emergency occurs. If no emergency watch signal is detected, the program will terminate immediately.

If an urgent monitoring required signal is detected, in step 304, the monitoring correspondence table shown in FIG. 6 stored in the ROM 21 is searched to transmit the urgent monitoring required signal. The number Em _{k, i} of the transmitting terminal device corresponding to the device number Am _{k, i, s} is specified. Then step 306
At, the terminal correspondence table shown in FIG. 3 is searched from the identified transmission terminal device number Em _{k, i} to determine frequency data. The frequency data is obtained in step 308.
The frequency data is set to the demodulator of the corresponding system,
A full screen display command and a channel fixed command are set in the image controller. As a result, the T of the corresponding system
An image of the place where the emergency signal transmission device emitting the emergency monitoring signal is installed is displayed on the entire screen of the V receiver. In this case, even if the program of FIG. 3 is executed, the TV of the system in which the channel fixed command is set
The receiver is designed so that the channel of the displayed image does not change. In addition, operating the control panel 26 in this state,
By activating this program, it becomes possible to change the angle, magnification, etc. of the television camera of the designated transmission terminal device Em _{k, i} , and the observer can recognize a more detailed image.

5. Operation of Transmission Terminal Device Next, the processing procedure of the CPU 40 of the terminal device Em _{k, i} will be described with reference to FIG. The RF modem 41 encodes the signal of the control channel ch0, and this program is started when the CD signal is output from the RF modem 41. In step 400, the data block encoded by the RF modem 41 is input. Next, in step 402, the address data of the data block is decoded. Next, at step 406, it is judged whether or not the address data matches the address assigned to the own terminal device. If it matches the self-address, the command data following the address data is decoded in step 406.

Then, in step 408, the command signal for turning on / off the power of the television camera 48, the vertical direction of the television camera 48, and the vertical direction of the television camera 48 according to the "1" or "0" state of each bit of the received command data. A rotation / stop command signal for the horizontal angle adjusting motor, a command signal for turning on / off the illumination, a command signal for rotating / stopping the zoom motor, and a command signal for rotating / stopping the focus adjusting motor are output to the camera control device 46. . The camera control device 46 inputs the command signal to turn on / off the power of the television camera 48, rotate or stop the vertical and horizontal angle adjustment motors of the television camera 48, turn on / off the illumination, or rotate the zoom motors. Then, the focus adjustment motor is rotated or stopped.

Next, in step 410, the analog switch 47 is set to the signal passing state or the signal passing blocking state according to the command data. This sending terminal device Em _{k, i}
When it is requested by the center device 2 to send out a video signal, the analog switch 47 enters a signal passing state, and the television camera 48 modulated by the modulation circuit 49.
The video signal of is output to the transmission line 1 as a signal of the channel chp. Thus, the center apparatus 2, transmitting terminal device Em _{k specified,} it is possible to display the image captured by the _i, it is possible to monitor the surrounding environment by the transmission terminal apparatus Em _{k, i.}

In step 404, if the address data of the received data block is not the self address, this program is terminated without performing the following processing.

Further, the video signal of the combined four screens is sent from the center device 2 to the transmission path of each system using a predetermined channel, and a plurality of sub-centers capable of monitoring the video are connected to each system. Is also good. At this time, the attitude, magnification, etc. of the television camera of each transmitting terminal device may be controlled in the sub center as well.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an overall configuration of a system according to a specific example of the present invention.

FIG. 2 is a block diagram showing a configuration of a center device in the embodiment.

FIG. 3 is a flowchart showing a main processing procedure of a CPU of the center device.

FIG. 4 is an explanatory diagram showing a terminal correspondence table stored in a ROM of the center device.

FIG. 5 is a flowchart showing a processing procedure of remote control of the television camera of the transmission terminal device by the CPU of the center device.

FIG. 6 is a flowchart showing an emergency display control procedure when an emergency monitoring signal is input by the CPU of the center device.

FIG. 7 is an explanatory diagram showing a monitoring correspondence table stored in a ROM of the center device.

FIG. 8 is a flowchart showing a processing procedure of a CPU of the transmission terminal device.

[Explanation of symbols]

1 ... Transmission path 2 ... Center device E1 _{1,1 to} Em _{k, i to} Eq _{j, 4} ... Transmission terminal device A1 _{1,1,1 to} Am _{k, i, s to} Am _{j, 4, r} ... Emergency signal transmission Devices TV1 to TVm to TVq ... TV receivers (image display means) IP1 to IPm to IPq ... Image controller (image display means) 20 ... CPU (channel designation means) 21 ... ROM (data storage means) Steps 112 to 118 ... Channels Designating means Steps 300 to 304 ... Monitoring required position specifying means Steps 306, 308 ... Emergency display control means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000004226 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo, Japan (71) Applicant 000143400 Takamizawa Electric Works Co., Ltd. 3-18, Kamima, Setagaya-ku, Tokyo 7 (72) Inventor Shinzo Mizuno 5-7-8 Shiba, Minato-ku, Tokyo Within Hibiya General Equipment Co., Ltd. (72) Inventor Tomigoro Abe 2-24-18 Chiyoda, Naka-ku, Nagoya, Aichi Aichi Electronics Co., Ltd. In-company (72) Inventor Yoshinori Kano, 5-12-12 Yajie-cho, Minami-ku, Nagoya-shi, Aichi 18 In-cast Co., Ltd. (72) Inventor Soichi Hashiba 3-18-7 Kamima, Setagaya-ku, Tokyo Takamizawa Electric Co., Ltd.

Claims (2)

[Claims] 1. A video surveillance system using a frequency-multiplexed broadband transmission line, wherein a plurality of broadband transmission lines and a plurality of demodulations for receiving signals of the broadband transmission line and demodulating a video signal of a designated channel. And a plurality of image display means for displaying signals of a plurality of channels on each divided screen based on video signals of the plurality of channels demodulated by the demodulator, and a frequency of a carrier wave for demodulation in each demodulator. A center device having channel designating means for sequentially setting data, and data storage means for grouping and storing frequency data sequentially set by the channel designating means into groups of channels simultaneously displayed by the display means; In each terminal of each broadband transmission path, the video signal captured by the image capturing device is designated. A video surveillance system consisting of a transmission terminal device for transmitting to a channel. 2. The video surveillance system according to claim 1, wherein the video camera is installed at a place where each of the transmission terminal devices is installed, and is urgent when emergency monitoring such as ignition, gas leak, alarm, or emergency contact is required. An emergency signal transmission device that outputs a monitoring required signal, a signal line that transmits the emergency monitoring signal output by the emergency signal transmitting device to the center, and when the emergency monitoring signal is input from the signal line Is a monitoring-required position specifying means for specifying a monitoring-required position, and when the emergency monitoring signal is input from the signal line, the sequential display by the display means is stopped, and the monitoring-required position specifying means is used. An emergency display control means for displaying on the display device only the video signal transmitted from the terminal installed at the specified monitoring required position is further provided.