An ultrasonic signal receiving and processing method based on signal section segmentation

A technology of ultrasonic signal and processing method, which is applied in processing the response signal of detection, using sound wave/ultrasonic wave/infrasonic wave to analyze solids, instruments, etc., and can solve the problems that defect signals cannot be extracted, etc.

Active Publication Date: 2019-05-03
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, in practical applications, it often occurs that one ultrasonic echo signal contains multiple defects. The multiple defects are defects at multiple different positions on the measured object. The multiple defects are independent of each other and do not overlap each...

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  • An ultrasonic signal receiving and processing method based on signal section segmentation
  • An ultrasonic signal receiving and processing method based on signal section segmentation
  • An ultrasonic signal receiving and processing method based on signal section segmentation

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Embodiment Construction

[0110] like figure 1 The shown method for receiving and processing ultrasonic signals based on signal segment segmentation includes the following steps:

[0111] Step 1. Ultrasonic echo signal acquisition and synchronous uploading and receiving: ultrasonic flaw detection device 1 is used to perform ultrasonic detection on the tested object to obtain the ultrasonic echo signal F(t) of the tested object, and the obtained ultrasonic echo signal is obtained. F(t) is synchronously transmitted to the data processing device 2; the data processing device 2 synchronously stores the received ultrasonic echo signal F(t);

[0112] in, t represents the time parameter, t i is the ith sampling time of ultrasonic flaw detection device 1, f(t i ) is the signal value sampled at the ith sampling time of the ultrasonic flaw detection device 1, i is a positive integer and i=1, 2, 3, ..., N z , N z is a positive integer and is the signal length of the ultrasonic echo signal F(t);

[0113] St...

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Abstract

The invention discloses an ultrasonic signal receiving and processing method based on signal section segmentation. The ultrasonic signal receiving and processing method comprises the following steps:1, acquiring and synchronously uploading and receiving an ultrasonic echo signal; 2, determining wave crests and wave troughs; 3, removing extreme points; wherein a data processing device is adopted to segment the ultrasonic echo signal F (t), and the process comprises the following steps that 401, the time interval of adjacent extreme points is determined; 402, judging a segmentation point and determining the sampling time of the segmentation point; 403, performing signal segmentation judgment; 404, sorting the segmentation points; 405, signal segmentation. The method is simple in step, reasonable in design, convenient to implement and good in using effect, segmentation point judgment and segmentation point sampling time determination are achieved by conducting threshold judgment on the time interval of the adjacent extreme points, and ultrasonic echo signals are segmented according to the determined number of segmentation points and the sampling time of all the segmentation points.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic flaw detection, in particular to a method for receiving and processing ultrasonic signals based on signal segment segmentation. Background technique [0002] Ultrasonic flaw detection (also known as ultrasonic testing or ultrasonic testing) is a non-destructive testing method that uses the differences in the acoustic properties of materials and their defects to reflect the ultrasonic wave propagation waveform and the energy changes of the penetration time to inspect the internal defects of materials. The principle of ultrasonic flaw detection is that the transmission loss of ultrasonic waves in solids is small and the detection depth is large. Because ultrasonic waves will reflect and refract on heterogeneous interfaces, especially they cannot pass through gas-solid interfaces. If there are pores, cracks, etc. in the metal. Delamination and other defects (gas in the defect) or inclusions, when ...

Claims

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Application Information

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IPC IPC(8): G06K9/00G01N29/04G01N29/44
Inventor 齐爱玲马宏伟张广明董明郝科伟康文惠
Owner XIAN UNIV OF SCI & TECH
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