Study And Development On Detecting System For The Elevator Up-direction Overspeed Protection Device

This paper focuses on the research of a suit of efficiently dependablely and technique forerunner detection system, using for detecting an up-direction overspeed protection device of elevator. The elevator up-direction overspeed protection device is a safe parts for stopping the elevator overspeeding in the up direction, and is a 2005 national and compulsive the request equip that the one of the safe parts on the elevator, therefore as to the elevator up-direction overspeed protection device and it's detecting system are development of the utmost urgency.According to the work principle, mechanical structure characteristics of the rope gripper's prototype and given requirement of stopping the elevator, the measure project of the elevator up-direction overspeed protection device is proposed, based on the dynamics analysis of the rope gripper. This paper applies extenics and detecting technology and virtual instrument technology into the detecting system, successfully designing outing a high performance, many functions detecting equipments and software of the elevator up-direction overspeed protection device. In the design of hardware, the optimal detecting measure and corresponding sensors were selected basing on requests of the detecting item, intellectual sensor (digital pressure instrument) and an outside place type data acquisition (DAQ) system based on USB interface were designed in the same time. This paper has also developed the detecting software of virtual instrument with the platform of the Graghic Programming Language-LabVIEW, which has test data's real-time sampling, analysis and processing. The software provides friendly man-machine interface for the detecting system. Finally, this detecting system has verified accuracy and dependability by using imitate experimentThe system that developed has such advantages as high stability and dependability, friendly operation interface, high testing efficiency, high degree of automation, which has realized many parameter quantity function measure of the elevator up-direction overspeed protection device. It can be used as detecting equipment of the elevator up-direction overspeed protection device in productionmanufactures and examining organizations.