A sensor noise signal suppression method in the process of three-point rotation error separation

A sensor noise and separation process technology, applied in the direction of instruments, measuring devices, etc., can solve the problems of affecting the separation results of errors and the amplification of negative effects of noise interference signals, etc.

Active Publication Date: 2018-05-15
XIDIAN UNIV
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Problems solved by technology

[0003] Due to the interference of complex working conditions and strong electromagnetic factors on the industrial site, noise interference signals with complex frequency components are often mixed into the sensor signal, and harmonic suppression is prone to occur in the data processing link of the three-point method. If it is not handled properly, noise interference The negative effect of the signal will be amplified, directly affecting the final error separation result

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  • A sensor noise signal suppression method in the process of three-point rotation error separation
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  • A sensor noise signal suppression method in the process of three-point rotation error separation

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Embodiment Construction

[0052] The process of the present invention is as figure 1 As shown, below in conjunction with accompanying drawing the embodiment of the present invention is described in detail:

[0053] 1. Optimize the construction of the objective function

[0054] Arrange i probes S along the test reference circle i (i=1,2,3), the angles between each sensor head and the x-axis are respectively Establish the frequency domain expression of the combined sensor signal in the three-point method after being affected by the noise signal δ interference:

[0055]

[0056] Among them, n is the serial number of discrete values ​​in the frequency domain, and n=0,1,2,...,N-1; N is the number of sampling points; R(ω n ) is the frequency domain expression of the test section profile signal r(kΔθ), ∏(ω n ) is the frequency-domain expression of the noise signal δ.

[0057] The error between the separated rotor profile signal r′(kΔθ) and the rotor true profile signal r(kΔθ) after being affecte...

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Abstract

The invention provides a sensor noise signal inhibition method in a three-point-method rotation error separation process. The method comprises steps that firstly, a sensor mounting angle is reasonably designed to carry out signal acquisition, and a sensor combination signal frequency domain expression in a three point method after noise signal interference is constructed; secondly, an error model of a real rotor contour signal and a contour signal acquired through separation after noise interference is established, and a transfer function of a noise signal in a separation process is acquired through analysis; lastly, an optimization target function is constructed according to the acquired transfer function, a harmony search algorithm based on coordinate rotation is further utilized to carry out optimization solution. According to the method, a sensor noise signal inhibition problem in the three-point-method rotation error separation process is converted into a target function optimization problem, each-order frequency components of the noise signal are effectively inhibited through optimizing the transfer function of the noise signal, and rotation error separation precision is improved.

Description

technical field [0001] The invention belongs to the technical field of sensor noise processing, and in particular relates to a method for suppressing sensor noise signals in the separation process of three-point rotation errors. The test accuracy of the signal has a good application prospect in the field of noise processing in industrial production. Background technique [0002] Error Separation Technique (Error Separation Technique) aims to separate the roundness profile error and rotation error of the measured object from the radial runout. The multi-point method can test the rotation error of the spindle without affecting the processing of the spindle of the machine tool. After the sensor is installed once, it does not need to be adjusted again. It is easy to realize automatic processing and is suitable for the integration of modern monitoring systems. At present, the most widely used and most mature multi-point method error separation system uses three sensors, which is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 章云魏乔张文波
Owner XIDIAN UNIV
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