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Barkhausen signal randomness measurement and conversion method

A conversion method, Barkhausen's technology, applied to the recognition of patterns in signals, computer components, instruments, etc., can solve the problem of signal randomness, and achieve the general purpose of feature conversion method, good stability, efficient and accurate detection and evaluation Effect

Active Publication Date: 2020-12-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of Barkhausen signal randomness measurement and conversion, and proposes a method for Barkhausen signal randomness measurement and conversion

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  • Barkhausen signal randomness measurement and conversion method
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  • Barkhausen signal randomness measurement and conversion method

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Embodiment Construction

[0076] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0077] Such as figure 1 As shown, the present invention provides a kind of Barkhausen signal randomness measurement and conversion method, comprises the following steps:

[0078] S1: Determine the original feature sample space X of the Barkhausen signal feature;

[0079] S2: Calculate the characteristic probability distribution space P of the original characteristic sample space X under the entire fatigue life cycle;

[0080] S3: In the feature probability distribution space P, reconstruct the original feature sample space X to obtain the first reconstructed feature sample space X s1 , the second reconstructed feature sample space X s2 and the third reconstructed feature sample space X s3 ;

[0081] S4: The original feature sample space X, the first reconstructed feature sample space X s1 , the second reconstructed feature sample space X s2 and th...

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Abstract

The invention discloses a Barkhausen signal randomness measurement and conversion method. The method comprises the following steps: S1, determining an original feature sample space of signal features;s2, calculating a feature probability distribution space of an original feature sample space; s3, reconstructing an original feature sample space; s4, inputting the original feature sample space andthe reconstructed feature sample space into a prediction model for prediction; s5, comparing prediction results to obtain interval indexes, and taking the interval indexes as Barkhausen signal randomness measurement results; and S6, adding ordered quantized noise to the Barkhausen signal of the selected interval index to complete the conversion of the randomness of the Barkhausen signal. The invention relates to research on a randomness measurement and conversion method of a Barkhausen signal which is a nondestructive testing technology, is completed by means of Bayesian uncertainty analysis,is greatly helpful to deeply understand the intrinsic random characteristics of the Barkhausen signal, and enables the characteristics in different states to be more differentiated through probabilityconversion.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to a method for measuring and converting the randomness of Barkhausen signals. Background technique [0002] The main material of mechanical equipment is ferromagnetic metal material, which is widely used in cutting-edge industrial sectors such as aviation, aerospace, vehicles, shipbuilding and atomic energy. During the long-term service of these equipment, they are often fatigued due to repeated loads, resulting in sudden failure and catastrophic accidents. Structural failure caused by fatigue accounts for 50% to 90% of mechanical damage, and is often sudden and catastrophic. Fatigue fracture is one of the deadliest killers for the safe operation of engineering structures and equipment. [0003] The fatigue failure process of metal materials in service can be roughly summarized as the early stage of mechanical property degradation, the initial stage of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06F2218/04G06F2218/12G06F2218/08
Inventor 李翔侯玉婷陈小平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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