A Double-ended Slit Piezoelectric Ring Acoustic Emission Transducer
A technology of transmitting transducers and piezoelectrics, applied in piezoelectric/electrostrictive transducers, transducers used underwater, piezoelectric/electrostrictive transducers resonant transducers, etc. It is difficult to solve the problems of cylindrical underwater communication equipment, etc., to achieve the effect of simple structure, lower operating frequency and lower vibration frequency.
Active Publication Date: 2022-03-22
HARBIN ENG UNIV
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Problems solved by technology
Therefore, the current low-frequency underwater acoustic emission transducers mainly use curved disc structures and bending-tension structures to achieve low-frequency acoustic emission. Acoustic communication nodes and other cylindrical underwater communication equipment, so it is necessary to develop an underwater acoustic emission transducer with a circular structure that uses bending vibration to emit low-frequency sound waves underwater
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[0031] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0033] Such as Figure 1-Figure 10 As shown, a double-ended slit piezoelectric ring underwater acoustic emission transducer includes a piezoelectric ring, and several longitudinal slits 4 are arranged at the upper and lower ends of the piezoelectric ring, and some longitudinal slits 4 at the upper end Slits are arranged opposite to several longitudinal slits at the lower end one by one. The depth and width of all the longitudinal slits 4 are the same, and the depth of the longitudinal slits 4 is 20%-30% of the length of the piezoelectric ring. The width of the slit 4 accounts for 5%-10% of the length of the circumference of the end where it is located. Under the excitation of sinusoidal...
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The invention provides a double-end slit piezoelectric ring underwater acoustic emission transducer, which includes a piezoelectric ring, a plurality of longitudinal slits are arranged on the upper end and the lower end of the piezoelectric ring, and a plurality of longitudinal slits on the upper end The longitudinal slits and the lower end of the longitudinal slits are arranged one by one. The depth and width of all the longitudinal slits are the same, and the depth of the longitudinal slits is 20%-30% of the length of the piezoelectric ring. The longitudinal slits at each end The width accounts for 5%-10% of the length of the circumference at the end, and under the excitation of sinusoidal voltage, the piezoelectric ring produces a double-end bending vibration mode. The double-end slit piezoelectric ring underwater acoustic emission transducer described in the present invention can be applied to cylindrical underwater communication equipment such as underwater acoustic communication nodes, and realizes the double-end bending vibration of the piezoelectric ring, realizing Low frequency acoustic emission.
Description
technical field [0001] The invention belongs to the technical field of underwater acoustic transducers, in particular to a double-end slit piezoelectric ring underwater acoustic emission transducer. Background technique [0002] Sound waves are currently the best way for underwater long-distance information transmission. The higher the frequency of the sound wave, the greater the absorption loss of the water medium to the sound wave, and the closer the sound wave travels. For underwater acoustic communication, in order to carry out long-distance transmission of information in the water medium with sound waves as the carrier, the underwater acoustic emission transducer must have the characteristics of low-frequency sound wave emission. At present, the ring-type underwater acoustic emission transducer is the most widely used in underwater acoustic communication equipment. Whether this type of underwater acoustic emission transducer is constructed with a radially polarized rin...
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IPC IPC(8): H04R1/44H04R17/10H04B11/00H04B13/02
CPCH04R1/44H04R17/10H04B11/00H04B13/02H04R2217/00
Inventor 卢苇蓝宇
Owner HARBIN ENG UNIV