Slip ring encoder and its encoding method

Abstract

Disclosed are a slip ring encoder and an encoding method thereof. The slip ring encoder includes: a code band fixed to the slip ring and having a plurality of holes regularly arranged; at least one pair of first sensors arranged on one side of the code band, each pair The first sensor is configured to generate a first sensing signal and a first redundant sensing signal respectively according to light emitted from the other side of the encoding band and passing through the plurality of holes when the encoding band rotates with the slip ring; at least A signal combining module, connected to the at least one pair of first sensors, is configured to combine the first sensing signal and the first redundant sensing signal to generate a combined sensing signal as a first encoding signal of the slip ring encoder. According to the embodiment of the present invention, redundant sensors are used to provide redundant signals to avoid the influence of foreign objects, improve the stability of encoded signals and ensure the normal operation of the whole machine.

Description

technical field [0001] Exemplary embodiments of the present invention generally relate to the field of encoders, and in particular to a slip ring encoder with redundant sensors and an encoding method thereof. Background technique [0002] Slip rings are commonly used in, for example, CT equipment. Usually, the X-ray source and detector are fixed on the circular slip ring surrounding the object to be inspected. Every time a circle is moved during work, an image of a thickness section of the object to be inspected is obtained. In the existing CT equipment, in order to obtain image information of different viewing angles, the rotation of the slip ring is required, and the position and rotational speed information during the rotation of the slip ring is required. For this reason, a slip ring encoder is designed. Its main function is to convert the information of the position and speed of the slip ring rotation into two orthogonal differential pulse signals of A and B phases and ...

AI Technical Summary

Problems solved by technology

However, when the slip ring encoder is running for a long time, due to the accumulation of dust and other reasons, the code belt part has sieve holes and blocked holes, resulting in the output of wrong differential pulse signals, causing abnormal control or operation of the whole machine

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