Adjustable gradient acoustic impedance matching layer

A technology of acoustic impedance and matching layer, which is applied in the field of ultrasonic transducers and acoustic detection, can solve problems such as complex artificial periodic structure, complicated matching layer manufacturing, and inability to meet working conditions and environments, so as to achieve good transmission efficiency and enhance flexibility and practical effects

Active Publication Date: 2020-07-24
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The existing acoustic impedance matching layers include single-layer and multi-layer; some are filled with low-density particles and some use complex artificial periodic structures
However, once the above-mentioned acoustic impedance matching layer is m

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  • Adjustable gradient acoustic impedance matching layer
  • Adjustable gradient acoustic impedance matching layer
  • Adjustable gradient acoustic impedance matching layer

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Embodiment Construction

[0035] The present invention will be further described now in conjunction with accompanying drawing.

[0036] The invention provides an adjustable gradient acoustic impedance matching layer. The gradient of the acoustic impedance matching layer can be adjusted accurately, which can improve the transmittance of acoustic energy and enhance the flexibility and practicability of the acoustic impedance matching layer.

[0037] Such as figure 1 As shown, the acoustic impedance matching layer 2 includes: a first material to be matched 1, a piezoelectric ceramic layer 2, and a second material to be matched 3; the piezoelectric ceramic layer 2 includes a plurality of serially connected piezoelectric ceramic sheets 5 and Corresponding external shunt circuit 4;

[0038] The piezoelectric ceramic layer 2 is installed between the first material to be matched 1 and the second material to be matched 3, and each piezoelectric ceramic sheet 5 is independently connected to an external shunt ci...

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Abstract

The invention belongs to the technical field of ultrasonic transducers and acoustic detection, and particularly relates to an adjustable gradient acoustic impedance matching layer which comprises a first to-be-matched material (1), a piezoelectric ceramic layer (2) and a second to-be-matched material layer (3). The piezoelectric ceramic layer (2) is arranged between the first to-be-matched material (1) and the second to-be-matched material layer (3), and comprises a plurality of piezoelectric ceramic pieces (5) connected in series and corresponding external shunt circuits (4); the piezoelectric ceramic pieces (5) are connected in series; and each piezoelectric ceramic piece (5) is independently connected with the external shunt circuit (4), and the acoustic impedance of each piezoelectricceramic piece (5) is adjusted by regulating and controlling the external shunt circuit (4), so that the acoustic impedance matching layer is in gradient distribution.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic transducers and acoustic detection, and in particular relates to an adjustable gradient acoustic impedance matching layer. Background technique [0002] In ultrasonic testing and biomedical ultrasonic engineering, the impedance mismatch between the piezoelectric layer with high acoustic impedance and the working medium with low acoustic impedance will cause a large amount of acoustic energy loss, seriously affecting the detection accuracy. [0003] At present, the method of installing a matching layer in the impedance mismatch medium is mostly used to improve the acoustic energy transmission rate. The existing acoustic impedance matching layers include single-layer and multi-layer; some are filled with low-density particles and some use complex artificial periodic structures. However, once the above-mentioned acoustic impedance matching layer is manufactured, its impedance characteristics are ...

Claims

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Application Information

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IPC IPC(8): H04R17/00H04R31/00
CPCH04R17/00H04R31/00
Inventor 杨玉真毕亚峰贾晗杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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