A multi-turn encoder using a reed switch and its method for determining the direction and counting the number of turns

Abstract

The invention relates to a multi-turn encoder adopting reed pipes and a direction judging and turn-number counting method thereof and belongs to a multi-turn encoder and a direction judging and turn-number counting method thereof. A rotation turn number counting function of the encoder is achieved by adopting one, two or three reed pipes, the detection of the reed pipes changes with a magnetic field rotating about an axis of the encoder, and opening and closing states are switched to turn on or turn off a follow-up counting circuit so as to calculate the rotating turn number of the encoder. For avoiding counting data loss under the outage condition of a main power supply circuit, a battery is additionally added to keep the counting function under the outage condition. For prolonging the service life of the reed pipes, it is ensured that no switching action is executed under the energization condition, a coil can be wound on the outside, the problem of existing structural complex at present is solved by controlling the switching functions of the reed pipes through the controller, good stability properties are ensured, and the reliability is high.

Description

technical field [0001] The invention relates to a multi-turn encoder and a method for judging direction and counting the number of turns thereof. Background technique [0002] The multi-turn absolute encoder can increase the measurement range of the single-turn absolute encoder, so that the function of measuring the single-turn rotation position can be extended to measure the linear movement distance. There are various ways to count the number of turns of multi-turn encoders, mainly including gear structure counting structure, Hall chip counting and reluctance chip counting. Due to the gear structure, while increasing the weight of the encoder itself, the counting accuracy also depends on the machining accuracy of the gear parts and the corresponding separated code disc. The complex structure brought by the gear structure also brings risks to product reliability. [0003] The Hall chip also has disadvantages such as poor stability and non-universal application. The design ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a multi-turn encoder using a reed switch and a method for counting the number of turns in order to solve the existing problems of complex structure, poor stability and poor reliability

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