Grating encoder calibration system and grating encoder calibration method

Abstract

The invention relates to a grating encoder calibration system and a grating encoder calibration method. The system comprises a grating encoder used for outputting high and low level of three channels of three-phase position signals and one channel of speed signals, a microcontroller used for calculating the number of speed pulses output by the grating encoder through one-circle rotation and the number of speed pulses contained in the high and low level of the three-phase position signals and sending the data to a principal computer, and the principal computer used for receiving the data and judging whether the grating encoder is normal or not according to the data.

Description

technical field [0001] The invention relates to a calibration system and method for a grating encoder. Background technique [0002] Switched reluctance motor is a new type of high-performance variable speed transmission system, and the feedback of the high and low levels of speed and position signals is an important link. The grating encoder is a digital detection device integrating light, mechanics and electricity. It is mainly used for the detection of motor speed and position, and is an important part of the switched reluctance motor control system. [0003] The grating encoder is composed of a photoelectric code disc with a shaft in the center, and the photoelectric code disc is composed of an outer code track and an inner code track. Among them, both the outer code track and the inner code track have the same angular distribution of light and dark grating lines. The outer code track has 1024 bright grating lines and dark grating lines, which are mainly used for the sp...

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Problems solved by technology

[0004] Therefore, in the event of damage to the glass grating, breakdown of the photosensitive element, etc., the pulse output will be inaccurate, resulting in the failure of the motor control system

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