Large-power air coupling ultrasonic vibration transducer

Abstract

The invention discloses a large-power air coupling ultrasonic vibration transducer which comprises a bolt, a back shroud, a piezoelectric ceramic piece, an electrode piece, an amplitude transformer, a conversion sleeve, a vibrating plate and a coupling layer, wherein the coupling layer is stuck to the vibrating plate. The back shroud, the piezoelectric ceramic piece, the electrode piece and the amplitude transformer are sleeved on the bolt in sequence, the back shroud and the amplitude transformer clamp the piezoelectric ceramic piece and the electrode piece tightly through the bolt, the conversion sleeve is arranged at the front end of the amplitude transformer, and the vibrating plate and the coupling layer which is stuck to the vibrating plate are arranged at the front end of the conversion sleeve. The large-power air coupling ultrasonic vibration transducer uses a sandwich type piezoelectric transducer structure and has the advantages of being large in power capacity, high in sound field output strength and the like. The large-power air coupling ultrasonic vibration transducer can be applied to the fields of ultrasonic defoaming, ultrasonic suspension, ultrasonic medical treatment, ultrasonic dedusting, ultrasonic drying, ultrasonic gas medium sound field focusing, multi-phase sound field focusing, ultrasonic coagulation, ultrasonic nondestructive testing and the like.

Description

technical field [0001] The invention relates to the field of ultrasonic vibration sound field output using the inverse piezoelectric effect, in particular to a high-power air-coupled ultrasonic vibration transducer. Background technique [0002] With the development of ultrasonic technology, the application of high-power sound waves in the air is becoming more and more extensive. In order to obtain a high-intensity sound field in a designated area, at present, methods such as self-focusing on curved surfaces, acoustic lens focusing, multi-element array self-focusing, and phased array focusing are used. These methods of obtaining high-intensity sound fields are widely used in many production fields. There are applications, which can meet the needs of basic production applications, but there are also some shortcomings. The curved surface has self-focusing and acoustic lens focusing methods, the conversion rate of ultrasonic energy is low, and the power of focused sound is smal...

AI Technical Summary

Problems solved by technology

In order to obtain a high-intensity sound field in a designated area, at present, methods such as self-focusing on curved surfaces, acoustic lens focusing, multi-element array self-focusing, and phased array focusing are used. These methods of obtaining high-intensity sound fields are widely used in many production fields. There are applications, which can meet the needs of basic production applications, but there are still some shortcomings. The curved surface has self-focusing and acoustic lens focusing methods, the conversion rate of ultrasonic energy is low, and the power of focused sound is small. Especially the curved surface has self-focusing and processing is difficult. Large size, high cost, etc. Although multi-element array self-focusing and phased-array focusing have large focused acoustic power, they also have problems such as low conversion rate of ultrasonic energy, high power consumption, large volume, and inconvenient movement.

[0003] In order to overcome the shortcomings of the above high-intensity sound field acquisition technology, the patent document with the publication number CN1942218 discloses a quasi-self-focusing high-intensity high-power ultrasonic transducer, the quasi-self-focusing high-intensity high-power ultrasonic transducer is made of piezoelectric ceramic Two layers of low-loss and high-acoustic-resistance backing materials are set on the back of the transducer assembly, and the two-layer low-loss and high-acoustic-resistance backing materials have air cavities, which can transmit the sound waves emitted by piezoelectric ceramics to the rear to a certain extent. It is reflected back to the front to improve the intensity of the acoustic focus, but the power capacity of the transducer is small, the acoustic focus intensity is low, and the piezoelectric ceramic sheet has a curved surface structure of 4-24 pieces, which is difficult to process and relatively expensive to produce. high

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