There are more than 300,000 elevators in China, and the annual demand is about 50,000. The elevator has to run 24 hours without interruption, and the safe operation of the elevator is the most concerned. There are two factors affecting the safe operation of the elevator. One is the quality and reliability of the elevator system; the other is the human factor that causes the personal safety inside the elevator car.
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For a long time, elevator intercom mainly adopts the bus system intercom system, which is one of the mandatory requirements for elevator safety operation. However, with the popularization of video surveillance system, the newly installed elevators began to install video surveillance, which improves the safety of elevator operation. Adding video surveillance in the elevator often faces the problem of video interference, because the elevator motor is running with strong electromagnetic radiation signals, which can cause interference from video surveillance images. In order to solve the video interference problem, the factory will use video anti-jamming device.
The elevator video alarm intercom linkage system introduced in this paper has been well received by engineers and users in the practical application of new and old systems. It only needs to transmit video surveillance image, alarm signal transmission, audio and video intercom signal through a single video cable, and has video anti-interference ability. This stable and reliable non-bus transmission structure, reliable alarm mode, high-quality audio broadcast intercom mode, automatic switching of the video linkage function of the alarm elevator image during alarm, greatly improving the safe operation of the elevator, reducing the cable material and shortening Construction time reduces the system cost.
Elevator video alarm intercom linkage system
Elevator video alarm intercom linkage system has applied for the invention patent new technology (application number X.), no need to lay cables, use elevator video monitoring cable not only to transmit video monitoring signals but also to transmit alarm signals, audio intercom, through MCU The control technology and computer management software realize the video alarm intercom linkage control, which can realize the network control of 128 elevators.
How the system works
The core device of the video linkage control system is composed of a single-channel audio and video control modulator (abbreviation: modulator), an 8-channel audio and video linkage controller (referred to as controller), a video linkage switch (referred to as a switch), and a management computer. Equipped with pickups, broadcast speakers, and broadcast amplifiers to form an elevator video alarm intercom linkage monitoring system.
System implementation function
When the alarm button in the elevator is pressed, the video image of the alarm elevator is automatically switched on the elevator monitor of the monitoring room and the sound in the elevator is monitored, and the controller has an alarm sound.
Switching the broadcast signal enables voice intercommunication with the personnel in the elevator.
More than 2 elevators will alarm at the same time, the computer can display 2 no more alarm prompts at the same time, and automatically switch to the elevator screen of the latest alarm to realize the intercom.
Monitor elevator and alarm intercom detection. Usually, the video image of each elevator can be switched and displayed by the computer management software, and the monitoring image and the intercom function can be detected through the intercom return sound.
Three-way intercom or five-party intercom. The five-way intercom cable can be connected to the video cable. In the multi-party intercom that requires elevator maintenance and repair, a simple intercom or small telephone exchange can be connected to achieve multi-party intercom.
For high-grade elevators, it is necessary to transmit the operating data of the elevator to the monitoring room terminal equipment, and realize remote control of the elevator, which makes the elevator operation more reliable and more convenient and quick to solve the elevator failure. By adding a controller to the elevator, the elevator controller operation data can be transmitted to the terminal device and remote control can be realized.
Elevator video surveillance intercom linkage system
The main equipment in each elevator car is: audio and video control modulator (referred to as: modulator), alarm button, pickup, broadcast speaker, camera.
The audio pickup is mounted in the elevator car control panel and the audio output is connected to the modulator. The volume can be adjusted via the volume adjuster on the pickup. The pickup can be either a built-in mic or an external mic.
The elevator alarm button is connected to the alarm/broadcast control port on the modulator, and the alarm signal is transmitted directly to the terminal device via the transmission cable.
The passive broadcast speaker is connected to the alarm/broadcast control port on the modulator. After receiving the alarm signal, the terminal device gives a broadcast signal to realize the audio two-way intercom. If the broadcast speaker is disconnected, an alarm will be sent automatically.
The camera is connected to the video input port on the modulator.
The transmission cable is connected to the RF output port on the modulator.
The modulator is powered like a video camera, DC12V.
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