Control method of probe with ultrasonic phased array transducers in hinge array

Patent metadata

Field	Value
Publication number	US-11536700-B2
Application number	US-202017079430-A
Country	US
Kind code	B2
Filing date	Oct 24, 2020
Priority date	Apr 24, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The disclosure relates to a control method of a probe with ultrasonic phased array transducers in a hinge array, and belongs to the technical field of ultrasonic detecting. The control method includes the steps: firstly, fixing a part under test, making a central piezoelectric array element of piezoelectric array elements for the ultrasonic phased array transducers in the hinge array make contact with a surface of the part under test, and then fixing a fixed support; before detection is started, driving the hinge array through voice coil motors to make the piezoelectric array elements completely fit the surface of the part under test, wherein the number of the piezoelectric array elements is 2N+1 (N=1, 2, 3, 4 and 5), and different values of N are selected according to a size of the part under test; with the value of pressure of the central piezoelectric array element as a standard and difference values between values of pressures of other piezoelectric array elements and the value of pressure of the central piezoelectric array element as control signals of respective corresponding voice coil motor coils, controlling output rods to drive the hinge array; keeping the values of pressures of all the piezoelectric array elements consistent by means of an incremental digital PID control method; and then realizing deflecting and focusing of ultrasonic waves by means of a time delay rule for ultrasonic detecting, thereby detecting parts under test with planar or curved surfaces.

First claim

What is claimed is:

1. A control method of a probe, wherein the probe comprises ultrasonic phased array transducers in a hinge array, and the control method comprises the following steps:
fixing a part under test, making a central piezoelectric array element of piezoelectric array elements contact with a surface of the part under test, and then fixing a fixed support;
symmetrically arraying and fixedly connecting voice coil motor magnetic cylinders onto the fixed support;
before detection is started, driving the hinge array through voice coil motors to make the piezoelectric array elements completely fit the surface of the part under test, wherein a number of the piezoelectric array elements is 2N+1, where N=1, 2, 3, 4 and 5, and different values of N are selected according to a size of the part under test;
configuring the piezoelectric array elements as pressure sensors using a piezoelectric effect to collect all values of pressures, F 1 , F 2 , . . . , F N , . . . , F 2N and F 2N+1 ;
by using difference values e, as control signals of respective corresponding voice coil motor coils, i=1, 2, . . . , (N−1), (N+1), . . . , 2N, (2N+1), e i =(F i -F N ), F N being the value of pressure of the central piezoelectric array element, controlling output rods to drive the hinge array;
controlling the values of pressures of all the piezoelectric array elements i, i=1, 2, . . . , (N−1), (N+1), . . . , 2N and (2N+1), by an incremental digital PID control method:

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Assignees

• Harbin Inst Technology

Inventors

• Zhao Bo
• Li Jiaxin
• Shi Weijia
• Tan Jiubin

Classifications

• G01N29/262 Primary

  by electronic orientation or focusing, e.g. with phased arrays (phased arrays per se G10K11/34) · CPC title

• G01N29/221 Primary

  Arrangements for directing or focusing the acoustical waves (electronic orientation or focusing G01N29/262; sound directing or focusing G10K11/26; mechanical steering of sound transducers or their beams G10K11/35) · CPC title

• G01N29/2437

  Piezoelectric probes · CPC title

• G01N29/225

  Supports, positioning or alignment in moving situation · CPC title

• G01N29/223

  Supports, positioning or alignment in fixed situation (mounting transducers per se G10K11/004) · CPC title