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An Analysis Method of Encoder Error Source Based on Spectrum Analysis

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

Active Publication Date: 2022-05-17
艾晨光
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  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • An Analysis Method of Encoder Error Source Based on Spectrum Analysis
  • An Analysis Method of Encoder Error Source Based on Spectrum Analysis
  • An Analysis Method of Encoder Error Source Based on Spectrum Analysis

Examples

Experimental program
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Embodiment 1

[0032] A kind of encoder error source analysis method based on frequency spectrum analysis, comprises the following steps:

[0033] 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;

[0034] ②. Computer graphics: the computer makes error curves and error spectrum diagrams for the data, and defines the error spectrum;

[0035] 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;

[0036] 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.

[0037] The computer makes an error curve graph and an error spectrum graph for the da...

Embodiment 2

[0053] An example of the detection, debugging, re-testing, and re-debugging process of an encoder: 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:

[0054] 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 ∆φ can be expressed as ,in Represents the angle value measured by the measuring standard instrument, Represents the angle value of the encoder under test.

[0055] image 3The vertical axis of the curve in the error curve is ∆φ, unit 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 frequency spectrum analysis, comprising the following steps: data collection and analysis: acquiring the data of the encoder under test through an encoder error measuring device, and inputting the data into a computer for analysis; Drawing: The computer makes error curves and error spectrum diagrams for the data, and defines the error spectrum segment; analysis of the maximum error source: obtain the error amplitude of the encoder in each cycle frequency according to the error spectrum diagram, and judge the maximum error factor of the encoder. An encoder error source analysis method based on frequency spectrum analysis described in the present invention can obtain the source of various errors of the programmer, which is convenient for people to analyze the cause, can obtain the contribution of the encoder error, and quantitatively point out the next step of the encoder Debug direction, quickly solve problems, greatly improve work efficiency and work quality, and at the same time, the errors reflected by the encoder can be analyzed comprehensively, bringing better prospects for use.

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] The encoder is used as an instrument for measuring shaft angular displacement, and its angular measurement error is the most important indicator for measuring characteristics; [0003] At present, there are two methods for measurement. One is to use a high-precision polyhedron (N face, N: 13, 17, 23, 24, etc.) The other is to use a precision angle measuring turntable to measure the fixed feature points (N: 17, 23, 24, 36, etc.), and the reading points to get the measurement error of the encoder . 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 situat...

Claims

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Application Information

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