The core equipment of the video linkage control system is composed of a single-channel audio and video control modulator (referred to as: modulator), an 8-channel audio and video linkage controller (referred to as: controller), It consists of a video linkage switch (switcher for short) and a management computer. When coupled with a pickup, broadcast speaker, and broadcast amplifier, it can form an elevator video alarm intercom linkage
monitoring system.
Audio and video transmission. Using cable TV audio and video signal transmission technology, the camera's 0~6MHz video signal
is modulated to a high-frequency band above 49.75MHz, and the coaxial cable's 0~1GHz bandwidth is used to transmit audio
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Video signal. This transmission method is the same as the video anti-interference device, video multiplexer, and wireless cable line. The high-frequency signal sent by the modulator is demodulated by the demodulation module of the controller to produce audio and video signals. .
Alarm signal transmission. Adopting a new technology that has applied for invention patents, using the low-frequency band of coaxial cables,
the alarm button in the elevator directly adopts the universal normally open alarm method, and uses the video cable to directly transmit the alarm signal
The signal is transmitted to the terminal controller, and the controller transmits the alarm data to the management computer.
Broadcast signal transmission. Place a passive broadcast speaker in the elevator and connect it to the modulator. The management computer
issues instructions to the controller and transmits the broadcast signal to the elevator loudspeaker through the video cable.
System control. The system uses RS232 and RS485 control methods to realize two-way data communication between the computer, controller and switch. The various functions of the system are controlled by the microcontroller in the controller and the management computer. The system
can connect up to 16 8-channel audio and video linkage controllers to realize video, alarm,
audio intercom and control linkage of 128 monitoring points.
Elevator intercom video linkage control
The elevator intercom system is one of the main security facilities for elevators, and the use of elevator video surveillance is becoming more and more common
and. With the help of video transmission cables, the elevator intercom and video surveillance are combined into one, and video linkage is achieved.
It not only improves the safety prevention effect, but also reduces the cost of the system.
Main equipment and features of the system:
1. Main equipment: audio and video control modulator, 8-channel video linkage controller, management computer;
2. Supporting equipment: camera, pickup, alarm button, broadcast speaker, broadcast amplifier, monitor;
3. Only use video coaxial cable, no need to lay additional cables, to transmit all signals;
< p>4. Use standard SYV75-5 cable, the signal transmission distance is more than 600 meters; use standard SYWV75-53
The signal transmission distance is more than 800 meters, SYWV75-7 The cable transmission distance is greater than 1200 meters;
5. It has the function of anti-interference device;
6. Video surveillance alarm linkage, when the alarm occurs, the image of the alarm elevator camera automatically switches to the monitor ;
7. The computer can switch the broadcast signal to achieve two-way audio intercom;
8. It can receive multiple elevator alarm distress signals at the same time;
9. There is no need to lay intercom system cables, and the non-bus structure makes the system stable and reliable;
10. There is no need to regularly send people to the elevator to check the intercom system, and the equipment can be checked in the monitoring room;
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11. The 8-channel video linkage controller realizes RS485 or RS232 two-way communication with the computer;
12. Through the 16-channel audio and video control switcher, 16 8-channel video linkage controls can be cascaded device, the network can realize 128-channel elevator control.
13. Video anti-theft alarm linkage, perimeter alarm linkage, and access control alarm linkage can be realized at the same time;
14. Maintenance intercom equipment can be equipped to achieve five-way intercom; < /p>
15. It integrates video surveillance and intercom into one. The product is cost-effective and can save cables and reduce system costs.
Emergency call video intercom linkage control
The functions and features of emergency call video intercom linkage control are basically the same as those of the elevator video alarm intercom linkage control system
, but the environment at the monitoring point is not as narrow as in the elevator car. The selection of cameras, alarm pickups, and emergency alarm call buttons should be selected according to actual requirements.
Access control video linkage control
The control target of the access control system is the gates of various entrances and exits. The control objects are mainly electromagnetic locks and electronic control
locks. Video surveillance is often required at major entrances and exits. The linkage of access control and video surveillance can better improve the security effect.
Main equipment and features of the system:
1. Main equipment: audio and video control modulator, 8-channel video linkage controller, management computer;
2. Supporting equipment: camera, pickup, call button, electronically controlled lock, relay, monitor;
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3. Only use video coaxial cable, no need to lay additional cables for transmission All signals;
4. Use standard SYV75-5 cable, the signal transmission distance is more than 600 meters; use standard SYWV75-5
The signal transmission distance is more than 800 meters, SYWV75-7 The cable transmission distance is greater than 1200 meters;
5. It has the function of anti-interference device;
6. Video surveillance linkage, the access camera image automatically switches to the monitor when the call button is pressed. on, monitor
listen to the live sound;
7. The computer switches the 12V level control signal to control the relay and open the electronic control lock;
8 , 8-channel video linkage controller realizes RS485 or RS232 two-way communication with the computer;
9. Through the 16-channel audio and video control switcher, 16 8-channel video linkage controllers can be cascaded to achieve 128
Road monitoring point network control.
10. Video anti-theft alarm linkage, perimeter alarm linkage, and elevator alarm intercom linkage can be realized at the same time;
11. Integrating video surveillance and multiple systems into one, the product is highly cost-effective , which can save cables and reduce system cost
.
Perimeter alarm and anti-theft video linkage control
Perimeter alarm and anti-theft alarm require video linkage. After receiving the alarm signal, the control center must call up the video image of the alarm scene or go to the alarm scene to check whether it is a false alarm. This period of time may have passed. Real alarms are missed, and too many false alarms can paralyze monitoring personnel. Through the linkage of video and alarm, you can see the video image of the alarm scene and monitor the sound of the alarm scene at the same time as the alarm. At the same time, you can also control the lights and other equipment at the alarm scene.
Main equipment and features of the system:
1. Main equipment: audio and video control modulator, 8-channel video linkage controller, management computer;
2. Supporting equipment: cameras, pickups, alarms, relays, spotlights, monitors;
3. Only use video coaxial cables, without laying additional cables, to transmit all signals;
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4. Use standard SYV75-5 cable, the signal transmission distance is more than 600 meters; use standard SYWV75-5
cable, the signal transmission distance is more than 800 meters, SYWV75-7 cable The transmission distance is greater than 1200 meters;
5. It has the function of anti-interference device;
6. Video surveillance linkage, when the perimeter alarm alarms (normally open alarm signal), the camera image Automatically switch to the
monitor to monitor the on-site sound;
7. The computer switches the 12V control signal, and the perimeter spotlights can be controlled at night by controlling the relay.
System, auxiliary video surveillance;
8. 8-channel video linkage controller and computer realize RS485 or RS232 two-way communication;
9. Switching through 16-channel audio and video control The controller can cascade 16 8-channel video linkage controllers to achieve network control of 128 monitoring points.
10. Elevator video anti-theft alarm linkage, access control linkage, and elevator alarm intercom linkage can be realized at the same time;
For more information, please refer to the First Security Network