Restoration correction method of ultrasonic phased array probe array

An ultrasonic phased array and probe array technology, which is used in material analysis, measurement devices, and instruments using sonic/ultrasonic/infrasonic waves, can solve problems such as high cost, time-consuming, labor-intensive, and unfavorable, and reduce repair and correction efficiency. , the effect of quick correction

Active Publication Date: 2017-11-07
SHAANXI NORMAL UNIV
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Problems solved by technology

Such a method is time-consuming and laborious, the cost is too high, and it is...

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  • Restoration correction method of ultrasonic phased array probe array
  • Restoration correction method of ultrasonic phased array probe array
  • Restoration correction method of ultrasonic phased array probe array

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The invention proposes to correct the array by using an adaptive algorithm to adjust the excitation parameters of the array elements. The adaptive algorithm is a filter estimation algorithm that adjusts a certain weighting coefficient according to a certain criterion, so that the error between the input and output signals is optimal according to this criterion. Generally, there are zero-forcing algorithm, steepest descent algorithm, least ...

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Abstract

The invention discloses a restoration correction method of an ultrasonic phased array probe array. The method comprises: through utilization of a sound-field superposition principle, in a normal excitation circumstance, calculating sound pressure distribution of multiple points of a standard array in space; taking the sound pressure distribution as a correction reference; through utilization of a self-adaptive-algorithm-based correction program, calculating correction coefficients of array elements from the first array element of a non-standard array; adjusting the excitation parameter of the corrected array through utilization of circularly changing the correction coefficient of the corrected array element; circularly completing all array element correction to obtain a correction parameter; taking the correction parameter as the initial value of each array element excitation parameter; repeating the first correction circulation to obtain a more accurate correction coefficient; taking the correction coefficient of each calculated array element as the excitation parameter of the corresponding array element; and correcting the radiated sound field of the non-standard array to achieve fast correction of array elements. The method is high in correction efficiency and allows cost of restoring and correcting an ultrasonic phased array to be reduced.

Description

【Technical field】 [0001] The invention belongs to the field of phased array ultrasonic application, and relates to a method for repairing and correcting an ultrasonic phased array probe array. 【Background technique】 [0002] Ultrasonic array transducers are composed of multiple transducer chips arranged according to certain rules, and each chip is excited according to a certain timing to synthesize various sound fields required. Ultrasonic phased array technology is widely used in medical ultrasound diagnosis and treatment, industrial testing and other fields. [0003] However, in the production process of the array transducer, due to factors such as processing level, it is inevitable that there will be size errors and spacing errors; Reduced efficiency, or even failure. These size errors and array element failure will affect the synthesis of the sound field of the entire array transducer, causing errors between the radiation sound field and the design sound field, and aff...

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Application Information

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IPC IPC(8): G01N29/30
Inventor 郭建中尹冠军沈壮志李盼
Owner SHAANXI NORMAL UNIV
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