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Encoder error source analysis method based on spectral analysis

An analysis method, a technology of spectrum analysis, applied in the direction of the instrument, etc., can solve the problems of not knowing the contribution of the encoder error, inconvenient to upgrade or maintain the encoder, and not being able to obtain various error sources, etc., so as to achieve convenient operation and use Good effect, the effect of improving work efficiency

Active Publication Date: 2020-12-29
艾晨光
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  • Application Information

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Problems solved by technology

Both methods are fixed feature points, and the error between two adjacent points is not measured, which cannot reflect all the measurement errors of all encoders, and the existing measurement methods can only reflect measurement errors, and cannot obtain various errors. The source situation is not conducive for people to analyze the cause, and it is not convenient for people to upgrade or maintain the encoder without knowing the contribution of the encoder error. For this reason, we propose an encoder error source analysis method based on spectrum analysis

Method used

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  • Encoder error source analysis method based on spectral analysis
  • Encoder error source analysis method based on spectral analysis
  • Encoder error source analysis method based on spectral analysis

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Embodiment 1

[0031] A kind of encoder error source analysis method based on frequency spectrum analysis, comprises the following steps:

[0032] ①. Data collection and analysis: Obtain the data of the tested encoder through the encoder error measurement device, and input the data into the computer for analysis;

[0033] ②. Computer graphics: the computer makes error curves and error spectrum diagrams for the data, and defines the error spectrum;

[0034] Obtain the error amplitude of the encoder in each cycle frequency according to the error spectrogram, and judge the maximum error factor of the encoder, that is, the maximum error source of the encoder;

[0035] The ordinate of the error graph is the error value of the encoder under test, which is the standard value of the turntable minus the measurement value of the encoder under test, and the abscissa of the error graph is the angle of the turntable.

[0036] The computer makes an error curve graph and an error spectrum graph for the da...

Embodiment 2

[0052] An encoder detection, debugging, re-testing, and re-debugging process is an example: the number of lines of the encoder is m lines, and the number of points collected by the precision angle measuring turntable in the range of 0-360° is 65536, and the detection time is 0.5 minutes ( RPM=2), input parameters such as figure 2 Shown:

[0053] Start detection and generate error graphs, such as image 3 As shown, the error value of the tested encoder on the ordinate of the error curve is the standard value of the turntable minus the measured value of the tested encoder; the error curve shows the extreme error and the average error, and the position error Δφ can be expressed as in Represents the angle value measured by the measuring standard instrument, Represents the angle value of the encoder under test.

[0054] image 3The vertical axis of the curve in the error curve is Δφ, the unit is arc second, the horizontal axis is the encoder position value, the range is 0-...

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Abstract

The invention discloses an encoder error source analysis method based on spectral analysis. The method comprises the following steps that data collection and analysis are carried out, specifically, data of a measured encoder are obtained through an encoder error measurement device, and the data are input into a computer for analysis; computer drawing is carried out, specifically, an error curve graph and an error spectrogram are made by the computer according to the data, and an error spectrum segment is defined; and a maximum error source is analyzed, specifically, error amplitudes of the encoder in periodic frequencies are obtained according to the error spectrogram, and a maximum error factor of the encoder is judged. According to the encoder error source analysis method based on spectral analysis, the source conditions of various errors of the encoder can be obtained so that people can conveniently analyze the generation reasons, the encoder error contribution degree condition canbe obtained, the next step debugging direction of the encoder can be quantitatively pointed out, the problem can be rapidly solved, and the working efficiency and the working quality are greatly improved; and meanwhile, the errors reflected by the encoder are comprehensively analyzed, so that a better application prospect is brought.

Description

technical field [0001] The invention relates to the field of encoders, in particular to an encoder error source analysis method based on frequency spectrum analysis. Background technique [0002] As an instrument for measuring shaft angular displacement, the encoder’s angular measurement error is the most important indicator for measuring characteristics; there are currently two methods for measurement, one is to use high-precision polyhedron (N surface, N: 13, 17, 23, 24 etc.) is coaxially connected with the encoder under test, aiming at each corrugated surface of the polyhedron through an autocollimation light tube, and measuring the angle measurement error of each surface angle measurement; the other is to use a precision angle measurement turntable to measure fixed feature points (N: 17, 23, 24, 36, etc.), the reading point gets the measurement error of the encoder. Both methods are fixed feature points, and the error between two adjacent points is not measured, which c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 艾晨光
Owner 艾晨光
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