Detecting circuit and method for short circuit of elevator door lock loop

Abstract

The invention provides a detecting circuit and method for a short circuit of an elevator door lock loop. A plurality of floor door lock safety contacts are connected in series, and the first ends of the floor door lock safety contacts are connected with a voltage and form a first node; the second ends of the floor door lock safety contacts are connected with car door lock safety contacts and form a second node; and the other ends of the car door lock safety contacts forms a third node. The detecting method comprises the steps: when an elevator reaches a flat bed position of a target floor and a door is opened in place, detecting whether the third node is provided with a voltage signal or not, if yes, outputting a short circuit signal and carrying out fault treatment, if not, detecting whether the second node is provided with a voltage signal or not, if yes, outputting a short circuit signal and carrying out fault treatment, if not, judging whether the elevator is located on a door region position or not, if yes, communicating the first node and the third node and detecting whether the second node is provided with a voltage signal, if yes, outputting a short circuit signal and carrying out fault treatment. By using the detecting circuit and method, the condition that a main door lock loop, a floor door lock and a car door lock are short-circuited can be detected, and fault treatment can be carried out during short circuit to control the elevator to stop operating, so that hazardous conditions are avoided.

Description

technical field [0001] The invention relates to an elevator safety detection, in particular to a door lock short-circuit detection. Background technique [0002] Door lock short-circuit detection has always been a key issue in elevator safety work. When repairing the elevator, it is inevitable to short-circuit the door lock circuit, but after the elevator is repaired, the maintenance personnel will forget to remove the short circuit, and the normal wiring state of the door lock circuit will not be restored. The current technology cannot monitor the operating status of the electrical safety device at the closed position of the car door and the locking position of the locking device of the landing door lock. Casualty accidents, such as pinching, cutting, falling and other accidents. [0003] Therefore, there is an urgent need for a detection method and a detection circuit for short-circuiting of the elevator door lock circuit that can solve the above-mentioned problems. Co...

AI Technical Summary

Problems solved by technology

The current technology cannot monitor the operating status of the electrical safety device at the closed position of the car door and the locking position of the locking device of the landing door lock. Casualty accidents, such as pinching, cutting, falling accidents, etc.

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