Low-frequency and high-power transmitting transducer realization method based on piezoelectric single crystal material

Abstract

The invention belongs to the technical field of transducer and specifically relates to a low-frequency and high-power transmitting transducer realization method based on a piezoelectric single crystal material. According to the method, the single crystal material is taken as an active material of the transducer; a positioning frame which is shaped like a Chinese character ''tian'' is processed through polycarbonate; four small single crystal wafers are embedded into the positioning frame according to the same polarity, thereby forming a large piezoelectric single crystal wafer; a plurality of large piezoelectric single crystal wafers are connected with electrode plates in series in a traditional mode, thereby assembling a single crystal stack; all cathodes are leaded out through a lead; anodes are leaded out through another lead; and the large piezoelectric single crystal material is obtained in a mode of assembling small blocks. The method has the beneficial effects that load balance and selection of the best working point of the crystal stack are taken into consideration, the sending voltage response of the transducer is effectively improved in a low frequency, and the transducer has the advantages of small size, low frequency and high power.

Description

technical field [0001] The invention belongs to the technical field of transducers, in particular to a method for realizing a low-frequency high-power transmitting transducer based on a piezoelectric single crystal material. Background technique [0002] At present, sonar technology is still the main means for long-distance detection of underwater targets (submarines, torpedoes and mines, etc.). With the development of submarine acoustic stealth technology, the traditional passive sonar detection method has encountered great difficulties, and low-frequency active sonar has increasingly become one of the main means of underwater long-range target detection. In order to increase the range of sonar, it is necessary to reduce the operating frequency of sonar and increase the radiated sound power. [0003] The acoustic power radiated by the transducer at the resonant frequency can be written as where η ea is the electroacoustic conversion efficiency, ω r is the mechanical an...

AI Technical Summary

Problems solved by technology

In addition, low frequency transducers are generally larger in size, so the piezoelectric material in the active part is also larger

At present, because it is impossible to produce large piezoelectric single crystal materials, it is necessary to use small pieces to assemble large piezoelectric single crystal materials.

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