System for controlling the linkage of alarm talkback and video frequency of elevator

Abstract

The invention provides a system for controlling the linkage of the alarm talkback and the video frequency of an elevator, comprising elevator car devices (201-207), a single coaxial cable (501), control room receiving devices (301-307), a video monitoring system (401) and an administration computer (102), wherein the elevator car devices (201-207) receive and send bidirectional audio and video frequency signals, alarm signals and bidirectional elevator monitoring data, the single coaxial cable (501) bidirectionally transmits audio and video frequency signals, alarm signals, audio frequency talkback signals and data control signals, the control room receiving devices (301-307) modulate and demodulate the audio and video frequency signals in a real-time way and transmit the alarm signals, audio frequency signals, data and control signals in a time-sharing way, the video monitoring system (401) receives video frequency signals and control signals to realize the linkage of alarm and video frequency monitoring, and the administration computer (102) is used for controlling the elevator car devices, the control room receiving devices and the video frequency monitoring system. By using the invention, the single coaxial cable is used for transmitting the audio and video frequency signals, the audio frequency talkback signals, the alarm signals, the elevator data and the control signals, the linkage of the elevator alarm talkback and the video frequency monitoring system is realized, elevator operation data are transmitted, remote elevator control is realized, and audio and video frequency program sources are broadcasted.

Description

technical field [0001] The invention relates to the field of elevator safety, in particular to a new technology for elevator alarm, intercom, video monitoring linkage, elevator status monitoring and control, and playing audio and video programs to elevators. Background technique [0002] The alarm intercom in domestic elevators is an indicator of elevator security inspection every year. Elevator video surveillance has been widely used, and there are more and more applications for elevator operation status monitoring and remote control. Elevator advertisements are mainly in the form of flat pictures. And prior art is that elevator alarm intercom adopts three separate systems of bus system alarm intercom, video monitoring, and elevator remote monitoring. [0003] The elevator alarm intercom is equipped with one alarm intercom extension for each elevator and one intercom alarm host in the control room. The alarm intercom transmission lines of each elevator are aggregated to th...

AI Technical Summary

Problems solved by technology

[0006] The existing technology is that the three systems operate independently, and the operation is complicated. The elevator alarm intercom bus control mode often affects the entire intercom system due to cable joint failure or extension failure, which cannot meet the needs of receiving multiple elevator alarms at the same time. Video monitoring is often affected by elevators. The interference of variable frequency motors makes it difficult to realize large-scale elevator networking

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