Elevator car position detecting device

Abstract

The invention discloses an elevator car position detecting device. The elevator car position detecting device comprises a lift driving mechanism, an elevator car, a laser detecting component, a signalreceiver, a controller and an executor, wherein the lift driving mechanism, the elevator car, the laser detecting component, the signal receiver, the controller and the executor are arranged inside an elevator shaft; the lift driving mechanism is fixedly connected with the elevator car; the laser detecting component is arranged on the wall of the elevator shaft; the signal receiver is electrically connected with both the laser detecting component and the controller; the executor is electrically connected with the lift driving mechanism and the controller separately; the laser detecting devicecomprises a plurality of laser generators and a plurality of laser reflecting plates, wherein the laser generators are arranged on the wall of the elevator shaft; the laser reflecting plates are arranged on the outer sidewall of the elevator car; each laser generator further comprises a supporting guide rod which is fixed to the wall; and the upper part of each supporting guide rod is provided with a plurality of movable laser sources and a plurality of movable laser receiving plates. The elevator car position detecting device disclosed by the invention can be applied to a special occasion that a hoist rope is broken, can be used for implementing continuous high-precision detection on the position of the elevator car and can realize checking and error evaluation on a detection result.

Description

Technical field: [0001] The invention relates to the technical field of elevator detection, in particular to an elevator car position detection device. Background technique: [0002] At present, in the elevator speed control, there are mainly two methods for detecting the position of the elevator car: the rotary encoder method and the encoding method. The rotary encoder method has mature technology, simple structure, and convenient implementation, so it is widely used, but the relative slip between the traction wire rope and the traction sheave and the stretching of the traction rope will cause large detection errors. The encoding method is one of the important implementation methods of elevator car position detection in the elevator speed control at present. It can overcome the relative slippage between the traction wire rope and the traction sheave and the stretching of the traction rope caused by the rotary encoder detection method. Larger detection errors and other shor...

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Problems solved by technology

[0003] Chinese Invention Patent Authorization Notice CN100575230C (application number: CN03826457.9), CN1224569C (application number: CN01807856.7) discloses a kind of elevator car position detection device respectively, but both are due to the elevator car owner with code The length of the moving link is much longer than the lifting height of the elevator, and the implementation cost is very high, or there is no way to continuously detect the position of the car, and because there is only one detector for each rope to cooperate with it, it takes a lot of follow-up to realize the detection results. Cons such as marked ropes

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