A Self-Adaptive Compensation Method for Precise Code Zero Offset and Amplitude of Photoelectric Encoder

Abstract

The invention relates to the technical fields of decoding, compensation, debugging and the like of optical-electricity encoders, in particular to a precise code zero offset and amplitude self-adaptation compensation method of an optical-electricity encoder in order to resolve the problems that an existing method is high in complexity, the self adaptability of a decoding circuit is poor, a data packet obtained by an observation oscilloscope contains a large number of artificial errors, and the accuracy of an encoder is seriously reduced. The compensation steps include that photoelectric signals of the optical-electricity encoder are sampled through A / D, primary filtering is carried out on the sampled data through a recurrence average filtering method, and new data are obtained; a maximum value and a minimum value are obtained upwards and downwards from new data points in a sampling cycle through a bubbling method, smoothed estimation is carried on the maximum value and the minimum value through a median method so as to obtain an estimation wave peak value and an estimation wave trough value, and a new reference voltage is obtained through a first-order lag filtering algorithm. The precise codec zero offset and amplitude self-adaptation compensation method of the optical-electricity encoder greatly reduces the difficulty of ground testing and operation and improves test accuracy and adaptability to the external environment.

Description

technical field [0001] The invention proposes a photoelectric encoder precision code zero offset and amplitude self-adaptive compensation method, which relates to the technical fields of photoelectric encoder decoding, compensation and debugging. Background technique [0002] The photoelectric encoder in the satellite space optical communication system will be affected by many unpredictable effects in space, such as temperature changes, the impact of space debris, vibration, radiation, etc., which will cause deviation or even decoding of the photoelectric encoder during the decoding process. The error has seriously affected the testing and debugging on the ground. [0003] In the harsh environment and complex conditions, because the parameters of the photoelectric transmitter and photoelectric receiving device of the photoelectric encoder are easily affected by environmental factors, the photocurrent signal obtained by the decoding circuit changes greatly, which directly aff...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a photoelectric encoder fine code zero offset, amplitude self-adaptive compensation method, to solve the existing method due to the high complexity, poor adaptability of the decoding circuit, and the observation of the oscilloscope obtained The data contains a large number of human errors, which seriously reduces the accuracy of the encoder

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