Cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer

Abstract

The invention provides a cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer and relates to the field of ultrasonic transducers. The cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer comprises a radial radiation shell, a conical prestress elastic expanding structure, a cross-shaped orthogonal compound center mass block, four sets of piezoelectric ceramic crystal stacks and four outer mass blocks. The cross-shaped orthogonal compound center mass block comprises four composition parts, and one cylindrical hole and two conical holes are defined by the inner side faces of the composition parts. The expanding structure comprises a fixing device and two conical expanding bodies. The expanding bodies are inserted in the conical holes. Each piezoelectric ceramic crystal stack is formed by stacking electrode plates and an even number of piezoelectric ceramic crystals. The electrode plates on the inner layers are in butt joint with the outer side faces of the composition parts, and the electrode plates on the outer layers are in butt joint with the inner end faces of the outer mass blocks. The other ends of the four outer mass blocks are in butt joint with the inner wall of the radial radiation shell. The technical problem that dead zones of a sound field and the standing wave characteristic exist in an ultrasonic transducer in the prior art, and consequently the radial ultrasonic radiation strength is weak is 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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