Cylindrical transducer with stacked piezoelectric circular tubes with different internal diameters

Abstract

The invention provides a cylindrical transducer which is characterized by comprising stacked piezoelectric circular tubes with same external diameters and different internal diameters, a sound absorbing layer, an end cover, a plastic sealing layer, an output cable and a support. The stacked piezoelectric circular tubes with different internal diameters can be formed by casting integrally or adhering a plurality of piezoelectric circular tubes with different internal diameters together. By reasonably designing the internal diameters of the piezoelectric circular tubes, the resonant frequency of the circular tubes of all piezoelectric vibrators can be made closer and coupled, the combined frequency response can not generate intermittent and too deep valleys, composite multimode vibration can be formed, the operating bandwidth of the cylindrical transducer can be expanded effectively hereby, and the acoustic wave can be received and transmitted horizontally all around at high frequency by broadband.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic detection, and in particular relates to a transducer which adopts piezoelectric ceramic circular tubes with different inner diameters to transmit and receive underwater acoustic signals to realize underwater detection, which can be widely used in underwater communication, detection and target detection. Positioning, tracking, etc., are important components of sonar use. Background technique [0002] The underwater acoustic transducer is a device that converts sound energy and electrical energy into each other. Its status is similar to the antenna in radio equipment. It is a key device for transmitting and receiving sound waves underwater. Underwater detection, identification, communication, as well as marine environment monitoring and development of marine resources are all inseparable from hydroacoustic transducers. Transducers can be divided into transmitter type, receiver type and ...

AI Technical Summary

Problems solved by technology

[0013] To sum up, the current cylindrical transducer mainly works in the radial vibration mode of the ceramic tube. Although the sensitivity of this type of transducer is high, and its beam has a horizontal omnidirectional directivity, due to the small size of the piezoelectric Round tubes (diameter less than 10mm) are difficult to process, so the working frequency of radial vibration tube transducers is difficult to achieve high frequency

However, although the working frequency of the transducer whose wall thickness vibrates can achieve high frequency, its bandwidth is relatively narrow.

The above-mentioned fourth type of transducer uses the harmonics of the tube wall thickness vibration and radial vibration to generate coupling, but the bandwidth expansion is limited

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