Double resonant vibrations and double promptings longitudinal vibration transducer

Abstract

The invention provides a double-resonance double-excitation longitudinal vibration transducer, comprising a radiation head (1), a front crystal stack (2), an intermediate mass (3), a rear crystal stack (6), a tail load (7), a second One, the second, the third, the fourth insulating spacers, nuts (8) and prestressed screw rods (12); The series-parallel relationship, and the electrical connection between the positive and negative electrodes of the front crystal stack (2) and the positive and negative electrodes of the rear crystal stack (6), respectively can obtain a transducer for broadband emission or a transducer for narrowband high-sensitivity emission device; the dual-resonance dual-excitation longitudinal vibration transducer provided by the present invention has the characteristics of low mechanical quality factor Qm, wide frequency band, small fluctuation and high sensitivity, and can be used as a sensor for various detection sonars, underwater unmanned vehicles and underwater vehicles. Broadband or narrowband sound sources for communication equipment.

Description

technical field [0001] The invention relates to a transducer, especially a double-resonance double-excitation longitudinal-vibration transmitting transducer. This type of transducer can be used as various detection sonars, underwater unmanned aerial vehicles and underwater communication equipment. broadband or narrowband sound sources. Background technique [0002] In the field of underwater acoustics, with the development of modern sonar technology and weapon equipment technology, as well as the rapid development of modern signal processing technology, electronic technology, communication technology and computer technology, more and more requirements have been proposed for transducers and transducer arrays. high demands. Broadband transducer technology plays an increasingly important role in subsequent signal processing. Higher requirements are placed on the frequency band in many engineering projects. The transducer is a window for sensing physical quantities such as so...

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Problems solved by technology

In the article "Finite Element Design of Dual-excitation Broadband Transducer" published in the third issue of "Acoustics and Electronic Engineering" in 2003, Sun Haoguang and others mentioned that two crystal stacks are used to achieve broadband. The front crystal stack is two pieces connected in series. The rear crystal stack is 4 pieces in parallel, and then the front and rear crystal stacks are connected in parallel. As a result, the response of the transducer fluctuates above 5dB, and the frequency band fluctuates greatly. It can be seen that it is difficult to make the difference between the two resonances in actual simulation calculations and experiments. The fluctuation between -3dB

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