Design method of full-matrix linear ultrasonic transducer array

Abstract

The invention provides a design method of a full-matrix linear ultrasonic transducer array. The design method comprises the following steps: establishing single-array element space sound field distribution P of the full-matrix linear ultrasonic transducer array; establishing an array element directivity function D (theta 1, theta 2); solving an effective sound beam width w; determining a rectangular array element length a and a rectangular array element width b; determining an array element interval d; and evaluating the imaging quality of the array according to the number of given array elements and the effective detection aperture. The problem that no special sensor array design method exists in the existing full-matrix ultrasonic imaging technology is solved. The defect detection effectand the imaging quality superior to those of a conventional phased array are achieved. The number of array elements is reduced and the detection time efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of transducer array design, in particular to a design method of a full-matrix linear ultrasonic transducer array. Background technique [0002] At present, most of the sensor array structure parameters used for full-matrix data acquisition follow the principle that the distance between array elements in ultrasonic phased array probes is less than one-half of the ultrasonic length. If this principle is continued in full-matrix acquisition, it will bring The problem of too small array element spacing makes the array element width limited, resulting in low sound pressure in the sound field, which in turn leads to a decrease in detection sensitivity of defects, or even missed detection; The larger number of elements leads to an increase in the amount of data collected in the full-matrix mode, which reduces the imaging time efficiency; at the same time, it also increases the difficulty of making the array and mak...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a design method of a full-matrix linear ultrasonic transducer array, which solves the problem that the current full-matrix ultrasonic imaging technology does not have a special sensor array design method, and realizes a method superior to conventional phase control The defect detection effect and imaging quality of the array array can reduce the number of array elements and improve the detection time efficiency

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