Self-focusing ultrasonic transducer based on Fresnel wave-zone piezoelectric composite material

Abstract

The invention discloses a self-focusing type ultrasonic transducer based on Fresnel waveband type piezoelectric composite material. The self-focusing type ultrasonic transducer based on the Fresnel waveband type piezoelectric composite material comprises the Fresnel waveband type piezoelectric composite material, a matching layer is arranged above the Fresnel waveband type piezoelectric composite material, a metal wire is arranged below the Fresnel waveband type piezoelectric composite material, a backlining is arranged below the metal wire, bottom trays are arranged on the two sides below the backlining, the two bottom trays are made of insulating expoxy resin, insulating expoxy resin is also arranged on the two sides of the Fresnel waveband type piezoelectric composite material and on the two sides of the backlining, and a conductive shell is arranged outside the ultrasonic transducer. The self-focusing type ultrasonic transducer based on the Fresnel waveband type piezoelectric composite material has the advantages of being good in uniformity, high in flexibility, simple in machining process and high in machining precision, good in focusing performance, high in center frequency and very applicable to mini interventional type ultrasonic diagnosis and treatment, electrodes are connected and packaged conveniently, large-scale production is easy to achieve, and sound wave self-focusing of the flat type ultrasonic transducer is successfully achieved.

Description

technical field [0001] The invention belongs to an ultrasonic transducer device, in particular to a self-focusing ultrasonic transducer based on a Fresnel wave-zone piezoelectric composite material. Background technique [0002] With the rapid development of modern science and technology, acoustics has penetrated and intersected in many aspects. It has a wide range of applications in non-destructive testing and evaluation of materials, petroleum and geological exploration, medical diagnosis and treatment, underwater detection, noise control and audio technology. It is considered as the discipline with the greatest "extensibility" and is constantly opening up new growth points. As the key and core component of various acoustic research and acoustic measurement technology, the ultrasonic transducer is inseparable from the ultrasonic transducer for the emission and reception of sound waves. In particular, the focused ultrasonic transducer can converge the energy of sound waves...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, the present invention provides a self-focusing ultrasonic transducer based on Fresnel wave-zone piezoelectric composite materials, which overcomes the complex fabrication, difficulty in miniaturization, and process precision requirements of the existing focused ultrasonic transducers. High and high production costs, a new method of making high-precision, high-frequency, high-strength, miniature self-focusing transducers is proposed using negative or formal Fresnel zone composite materials made by MEMS technology

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