Elevator plc transmission system and method supporting power-off continuous transmission

Abstract

The invention relates to the field of power line carrier communication and discloses an elevator PLC (Programmable Logic Controller) transmission system supporting continuous power failure transmission. The system comprises a local side power grid bridge, a terminal power grid bridge and connectors, wherein the local side power grid bridge is connected with a network access end; the local side power grid bridge is connected with a power transmission line in series; the terminal power grid bridge is connected with a terminal network; the terminal power grid bridge is connected with the other end of the power transmission line in an elevator cage in series; the connectors are used for respectively connecting the power transmission line when the local side power grid bridge and the terminal power grid bridge are connected with the power transmission line in series. The invention further discloses an elevator PLC transmission method employing the elevator PLC transmission system supporting continuous power failure transmission. The system has the advantages that the problem that continuous signal transmission of a moving device such as the elevator cage is possible under the condition of power failure is solved, the conventional power transmission line can be utilized, connection with the conventional devices is achieved in modes of serial connection and the like, and the system is convenient to install and low in transformation cost and has a higher application value.

Description

technical field [0001] The present invention relates to the field of power carrier communication, in particular to an elevator PLC transmission system supporting power-off continuous transmission and an elevator PLC transmission method using the above-mentioned elevator PLC transmission system supporting power-off continuous transmission. Background technique [0002] The elevator car is a metal-enclosed space. And elevator is owing to be in moving state all the time, and elevator shaft is complicated. General communication can only rely on the signal line in the accompanying cable to enter. But because the accompanying cable only provides the signal transmission needed for the elevator to run. There is no suitable transmission channel for high-bandwidth communication requirements such as the coverage of wireless signals in the elevator, the transmission of multimedia signals, and the transmission of monitoring signals in the later period. [0003] Power carrier is a conv...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the shortcomings in the prior art that cannot realize signal transmission to the elevator car when the power is cut off, and provides an elevator PLC transmission system that supports continuous transmission when the power is cut off and an elevator PLC transmission system that supports continuous transmission when the power is cut off. The elevator PLC transmission method of the elevator PLC transmission system detects the alternating current in the power transmission line and realizes the switching of the signal transmission mode in real time in the case of power failure

Images