A non-contact drive chain elongation detection method and system based on a hall proximity switch

Abstract

The application discloses a non-contact drive chain elongation detection method and system based on a Hall proximity switch, relates to the technical field of chain drive state detection, and derives a phase alarm threshold value by acquiring basic parameters of a Hall proximity switch group and a standard pitch of a chain, deploys a Hall component at a directly opposite detection position of a metal drive part of the chain, and relies on a running square wave signal to solve a phase difference in real time and compare the phase difference with the threshold value; due to the non-contact detection characteristics of the Hall element based on electromagnetic induction, the periodic movement of the metal part can be stably perceived in harsh environments such as oil stains, dust and moisture, the defects of laser light path contamination or contact type measurement abrasion are avoided, meanwhile, the phase difference algorithm can accurately quantify the chain elongation, real-time and low-loss online detection is realized, and therefore the technical problem that the elongation of the drive chain is difficult to be detected in real time, accurately and with low loss in a severe industrial scene is effectively solved.

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