Cross Orthogonal Composite Driving Piezoelectric Tube Transducer

Abstract

The invention provides a cross-shaped orthogonal compound drive piezoelectric tubular transducer and relates to the field of ultrasonic transducers. The transducer comprises a radial radiation shell, a conical prestress elastic expansion structure, a cross-shaped orthogonal compound center mass block and four piezoelectric ceramic crystal stacks, wherein the center mass block comprises four component parts; a cylindrical hole and two conical holes are formed by inner side faces of the component parts; the expansion structure comprises a fixing device and two conical expansion bodies inserted in the conical holes; and the piezoelectric ceramic crystal stacks are formed by stacking electrode slices and even number of piezoelectric ceramic crystal wafers, the inner-layer electrode slices butt against the outer side faces of the component parts and the outer-layer electrode slices butt against the inner wall of the radial radiation shell. By means of the transducer disclosed by the invention, the technical problems of ultrasonic transducers, that sound field blind area and standing wave property exist and the radial ultrasonic radiation intensity is low in the prior art, are solved.

Description

technical field [0001] The invention relates to the field of ultrasonic transducers, in particular to a cross-shaped orthogonal compound-driven piezoelectric tubular transducer. Background technique [0002] The function of the ultrasonic transducer is to convert the input electrical power into mechanical power (that is, ultrasonic waves) and then transmit it out, while consuming a small part of the power itself. [0003] In the field of power ultrasonic and underwater acoustic technology, the sandwich longitudinal vibration piezoelectric ultrasonic transducer is the most widely used. The transducer was invented by French scientist Lang Zhiwan, and has the advantages of simple structure, large power capacity and high electromechanical conversion efficiency. With the development of science and technology and the wide application of ultrasonic technology, ultrasound has gained important applications in many new technology fields (such as ultrasonic Chinese herbal medicine ext...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a cross-shaped orthogonal composite drive piezoelectric tubular transducer to solve the "blind area" of the sound field in the array ultrasonic transducer in the prior art, while the push-pull transducer radially The ultrasonic radiation intensity is weak, and the radiation sound field has obvious "standing wave characteristics" along the longitudinal direction

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