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A Method of Ultrasonic Imaging Based on Phase Ring Statistical Vector

An ultrasonic imaging method and ring-shaped technology, applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measurement devices, can solve signal amplitude interference, ultrasonic image signal-to-noise ratio and resolution It is difficult to meet the requirements of defect identification and other problems, and achieve the effect of high-precision quantification, good promotion and application prospects

Active Publication Date: 2021-01-15
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

Studies have shown that the signal amplitude is easily interfered by factors such as instrument and structural noise, probe grating lobes, etc., and the signal-to-noise ratio and resolution of ultrasonic images in special testing environments are difficult to meet the requirements of defect identification

Method used

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  • A Method of Ultrasonic Imaging Based on Phase Ring Statistical Vector
  • A Method of Ultrasonic Imaging Based on Phase Ring Statistical Vector
  • A Method of Ultrasonic Imaging Based on Phase Ring Statistical Vector

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with drawings and embodiments. see Figure 1 to Figure 3 , an ultrasonic imaging method based on circular phase statistics vectors, taking the imaging detection of a 50mm deep Φ3 side drill hole in a 96mm thick coarse-grained austenitic stainless steel test block as an example, including the following steps:

[0030] 1) if figure 1 As shown, an independent 128-channel ultrasonic signal acquisition system is built through a phased array probe 1, a multi-channel selector 2, an ultrasonic signal transmitter receiver 3, a digital oscilloscope 4, and a computer terminal 5. Among them, the phased array probe 1 is connected with the multi-channel selector 2, and the multi-channel selector 2 and the ultrasonic signal transmitter receiver 3 are connected through the transmitting interface TX and the receiving interface RX, and the connection between the multi-channel selector 2 and the computer terminal 5 The...

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Abstract

The invention discloses an ultrasonic post-processing imaging method based on a phase ring statistical vector. First, the phase information of each signal in the ultrasound array signal data set is extracted during the imaging implementation. Then, the phase in the same focused pixel is regarded as a random variable with circular distribution, and the circular statistical vector used to characterize the phase distribution characteristics is constructed. Finally, the modulus of the phase ring statistics vector is used as the eigenvalue for ultrasonic post-processing imaging. Compared with the conventional ultrasonic post-processing imaging method, this technology can not only effectively suppress the noise by amplifying the effect of the phase distribution on the signal amplitude, but also effectively improve the lateral resolution by reducing the width of the acoustic beam, and achieve a significant enhancement of the defect signal echo , and then effectively realize the high-precision quantification, positioning and characterization of the internal defects of the material, which has a good promotion and application prospect.

Description

technical field [0001] The invention relates to the field of ultrasonic nondestructive testing, in particular to an ultrasonic imaging method based on a phase ring statistical vector. Background technique [0002] Ultrasonic post-processing imaging methods represented by synthetic aperture focusing are widely used in important fields such as industrial nondestructive testing and medical diagnosis. The research shows that compared with the traditional B-mode, C-mode and D-mode ultrasonic imaging, the ultrasonic image obtained by the ultrasonic post-processing imaging method has a higher detection signal-to-noise ratio and resolution, and its defect detection ability and quantitative accuracy are higher. In addition, strong scalability and flexible algorithms are another advantage of ultrasound post-processing imaging methods. According to the detection status, researchers can develop corresponding optimization algorithms to achieve high-quality detection of defects / lesions. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/44G01N29/06
CPCG01N29/069G01N29/449G01N2291/0234G01N2291/0289
Inventor 陈尧甘勇冒秋琴张柏源纪霖轩卢超
Owner NANCHANG HANGKONG UNIVERSITY
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