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Circular grating four-reading-head data collecting and processing system and method

A technology of data acquisition and processing and four reading heads, which is applied in the direction of converting sensor output, measuring devices, instruments, etc., can solve problems such as harmonic errors, achieve level conversion and bus transmission stability, improve accuracy, and eliminate harmonic errors. Effect

Inactive Publication Date: 2021-05-07
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a grating reading head is used, the eccentricity of the bearing and the radial runout of the bearing have a great influence on the angle measurement of the circular grating, and the mechanical installation error of the circular grating will bring harmonic errors to the measurement

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  • Circular grating four-reading-head data collecting and processing system and method
  • Circular grating four-reading-head data collecting and processing system and method
  • Circular grating four-reading-head data collecting and processing system and method

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Embodiment Construction

[0048]The invention is further illustrated in connection with the preferred embodiments and the drawings below. The similar components in the drawings are expressed in the same reference numerals. Those skilled in the art will appreciate that the described in the following description is illustrative and not limiting, and the scope of the invention should not be limited.

[0049]Such asfigure 1 As shown, a round grating four read number data acquisition processing system, including:

[0050]Round gratings for measurement of angular position;

[0051]Four readers for reading the original angular signal measured by the round grating;

[0052]Digital transform circuitry for converting the original angular signal into a digital signal;

[0053]The data processing module is configured to perform data processing of the digital signal to obtain the final synthesized measurement data.

[0054]The four readings are installed on a round grating, which can eliminate the wonderful harmonic errors including eccen...

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Abstract

The embodiment of the invention discloses a circular grating four-reading-head data collecting and processing system and method, and the system comprises a circular grating which is used for measuring an angle position, four reading heads used for reading original angle signals measured by the circular grating, a digital conversion circuit used for converting the original angle signal into a digital signal, and a data processing module used for carrying out data processing on the digital signal to obtain finally synthesized measurement data. According to the system, the stability of level conversion and bus transmission of the multi-reading-head acquisition circuit is ensured from the hardware principle; harmonic errors caused by mechanical installation errors of the circular grating to measurement can be eliminated, and the precision of the encoder is improved. And the universality is high; the algorithm is simple and easy for engineering realization.

Description

Technical field[0001]The present invention relates to the field of hardware digital signal processing. More specifically, it is related to a circular grating four-read digital acquisition processing system and method.Background technique[0002]High-performance high-precision radar servo systems tend to adopt precision, resolution, and relatively high optical encoders as sensors of an antenna position to obtain absolute value position information. The round grating is also known as a circular grating encoder, is a precision digital angle device integrating light, machine, and electricity. There are several strips traveirs on the code tray of the absolute round grating, composed of light transmissions and opaisconducting sectors, and the light source is mounted on one side of the code disc, and the other side of each of the channelways. There is a photosensitive element, each of which is called a reading head.[0003]The original signal of a read head of the round grating is an approxima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/347
CPCG01D5/3473G01D5/34776
Inventor 吕泽杉张彬彬刘敏吕晓华
Owner BEIJING INST OF RADIO MEASUREMENT