Digital anti-reversal circuit for escalator

Abstract

The invention relates to a digital anti-reversal circuit for an escalator, and the digital anti-reversal circuit provided by the invention is used for solving the problems that the detection principle adopted by the escalator anti-reversal circuit in the prior art is related with the motor speed, and the control logic is not complete, so that the escalator cannot be started, an auxiliary circuit is required for supplement, the circuit is more complicated, and the cost is increased. The digital anti-reversal circuit comprises a signal generation module, a signal processing module, a counting module and an execution module which are connected in sequence, wherein the execution module is connected with an escalator safety chain circuit. In the anti-reversal circuit, whether the escalator motor is in a speed-reducing state or not is detected, if the motor is in a speed-reducing state, the escalator has a reversing trend, and the safety chain is disconnected to stop the escalator. The digital anti-reversal circuit for the escalator has the advantages that a digital circuit is adopted, so that the circuit structure is simpler, used elements are fewer, and the production cost is reduced;the detection principle of the anti-reversal circuit is not related with the motor speed, so the problem that the escalator cannot be started is solved, and the auxiliary circuit is omitted; the digital anti-reversal circuit does not require to be tuned one by one, so the reliability is better.

Description

Technical field [0001] The invention relates to an escalator control circuit, in particular to an escalator digital anti-reversal circuit that adopts a digital circuit, has nothing to do with the speed of an escalator motor, has a simple circuit structure, and has low cost. Background technique [0002] Escalators are generally installed in public places, such as large shopping malls, supermarkets, airports, and subways where passenger flow is concentrated. For this reason, the safe operation of escalators is directly related to people's quality of life and even safety of life. An escalator is generally driven by a motor-driven chain to drive the steps up or down in a continuous cycle to transport passengers. The forward or reverse rotation of the motor determines the direction of the escalator. Therefore, whether the escalator can ensure the normal upward or downward movement is very important. Some escalator manufacturers have realized the importance of escalator safety, and s...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the problem that the anti-reversal circuit of the escalator in the prior art adopts the detection principle related to the motor speed, and the control logic is incomplete, which causes the escalator to fail to start, and an auxiliary circuit needs to be used to make up for it, making the circuit more complicated and increasing the cost. A digital anti-reverse circuit for escalators whose detection principle has nothing to do with the speed of the escalator motor, simple circuit structure, and low cost

[0004] Another object of the present invention is to solve the problem that the escalator anti-reversal circuit in the prior art adopts the analog circuit form and the circuit structure is complicated, and provides a digital anti-reversal escalator with a digital circuit type, simple circuit structure and low cost. circuit

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