Ultrasonic signal processing method based on auto-encoder

An ultrasonic signal and self-encoder technology, which is applied in the direction of instruments, code conversion, character and pattern recognition, etc., can solve the problems of poor compatibility of signal noise reduction and screening, high computing cost, and large amount of computing, so as to avoid subjectivity and one-sidedness , improve the accuracy, and filter out the effects of random noise on the signal

Active Publication Date: 2019-06-07
XI AN JIAOTONG UNIV
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Problems solved by technology

However, both of the above two methods need to set artificial thresholds according to the noise distribution, which has poor compatibility with signal noise reduction screening and has certain subjectivity; and each signal processing process requires a large amount of computation and consumes a large amount of time. Computational cost of

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[0048] The invention provides an ultrasonic signal processing method based on an autoencoder. The autoencoder (Autoencoder) built by the neural network compresses and decompresses the ultrasonic A-scan signal. The relevant weight and bias variables of the function, and use this as the noise reduction

[0049] S1. Preprocessing of ultrasonic signals;

[0050] Ultrasonic A-scan signal refers to the original signal received by the ultrasonic probe, with the echo sound path and amplitude as the horizontal and vertical axes respectively. The output format of a single A-scan signal is generally a one-dimensional array, in which each element represents the echo intensity at different sound paths.

[0051] S101. Firstly, the dimension of the above-mentioned one-dimensional array is increased. In order to make the amplitude completely distributed in the two-dimensional array, firstly, each element of the one-dimensional array is rounded. In addition, the row number row of the two-dimen...

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Abstract

The invention discloses an ultrasonic signal processing method based on an auto-encoder. The method includes preprocessing an ultrasound signal, and then superposing samples of the ultrasonic signals,establishing and classifying a sample library of the ultrasonic signals, compressing and decompressing the ultrasonic A scanning signals through an automatic encoder established through a neural network, obtaining related weights and bias variables of the feature functions based on deep learning, and performing noise reduction processing on subsequent ultrasonic signals by taking the related weights and bias variables as noise reduction parameters. The method is good in signal noise reduction screening compatibility, small in operand and low in calculation cost, and the feature extraction accuracy of the noise reduction auto-encoder is improved.

Description

technical field [0001] The invention belongs to the technical field of industrial ultrasonic nondestructive testing, and in particular relates to an ultrasonic signal processing method based on an autoencoder. Background technique [0002] As a non-contact measurement method, non-destructive testing has been widely used in processing and manufacturing industries. According to the testing requirements, non-destructive testing methods for internal defects of the tested object include: digital ray testing, ultrasonic testing and industrial CT testing. Since digital ray detection requires radiation as an energy source, its operation is highly professional and has certain damage to the human body; although industrial CT detection has high detection accuracy, it is costly and low in detection efficiency, and due to the above two types of detection equipment Due to its large size, online detection and on-site detection cannot be realized. The ultrasonic testing equipment is relat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00H03M7/30
Inventor 李兵高飞陈磊魏翔贺琛李应飞
Owner XI AN JIAOTONG UNIV
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