Uniform design method for excitation parameter optimization of electromagnetic frequency mixing detection

A technology of uniform design and uniform design test, applied in the direction of material magnetic variables, complex mathematical operations, etc., can solve problems such as inapplicability, limiting the variation range and step size of optimization parameters, etc.

Pending Publication Date: 2019-07-23
BEIJING UNIV OF TECH
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Problems solved by technology

However, due to the uniform dispersion and orderly comparability of test points in the design of orthogonal experiments [4], the range a

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  • Uniform design method for excitation parameter optimization of electromagnetic frequency mixing detection
  • Uniform design method for excitation parameter optimization of electromagnetic frequency mixing detection
  • Uniform design method for excitation parameter optimization of electromagnetic frequency mixing detection

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Embodiment Construction

[0038] Below in conjunction with concrete experiment the present invention will be further described:

[0039] The implementation process of this experiment includes the following steps:

[0040] 1. Experimental system construction: according to figure 2 The system diagram of the detection device is shown to build an experimental system. The system includes a computer 1, a signal excitation acquisition board 2, a power amplifier 3 and an electromagnetic mixing sensor 4. Firstly, the computer 1 is connected with the signal excitation acquisition board, which is used to control the excitation of the magnetic mixing signal and the display, analysis and processing of the detection signal. The output port of the signal excitation acquisition card 2 is connected to the input port of the power amplifier for amplifying the excitation signal. Next, the output end of the power amplifier 3 is connected to the input end of the electromagnetic mixing sensor 4 for the sensor to magnetize...

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Abstract

The invention discloses a uniform design method for excitation parameter optimization of electromagnetic frequency mixing detection. The method comprises the following steps: carrying out a uniform design test by taking four excitation parameters of frequency mixing detection as test factors, and obtaining frequency mixing detection signals under different excitation parameter combinations throughthe detection test; processing the frequency mixing detection signals, extracting various characteristic indexes capable of reflecting frequency mixing response from the frequency mixing detection signals, and constructing a fuzzy model for frequency mixing response evaluation based on the characteristic indexes; and establishing a multiple regression equation of the four excitation parameters according to the fuzzy evaluation result. According to the method, the influence of the excitation parameters on the electromagnetic frequency mixing response is analyzed by adopting a stepwise regression method, and the extreme value of regression equation is solved by utilizing a genetic algorithm, so that the optimal combination of the four excitation parameters is obtained.

Description

technical field [0001] The invention relates to a method for optimizing excitation parameters of electromagnetic frequency mixing detection, in particular to a multi-excitation parameter optimization method based on a uniform design test. The method is suitable for excitation parameter optimization of electromagnetic mixing detection of ferromagnetic materials, and belongs to the field of nondestructive testing. Background technique [0002] Electromagnetic mixing detection technology is a non-destructive testing method that uses electromagnetic nonlinear mixing effect to detect micro-damages in ferromagnetic materials. In electromagnetic mixing detection, ferromagnetic components need to be in the alternating magnetic field with high and low frequencies superimposed. Generally, the strength of the low-frequency magnetic field is relatively large, which can magnetize the component to a near-saturation state; the intensity of the high-frequency magnetic field is generally sm...

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Application Information

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IPC IPC(8): G01N27/82G01N27/83G06F17/18
CPCG01N27/82G01N27/83G06F17/18
Inventor 焦敬品常予李光海吴斌何存富
Owner BEIJING UNIV OF TECH
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