An electric underwater acoustic emission transducer
A transmitting transducer, electric technology, applied in the direction of the transducer used underwater, can solve the problems of large volume, working depth limitation, etc., achieve the effect of reducing quality, ensuring water tightness, and improving sound radiation ability
Active Publication Date: 2017-05-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology
Due to the strong compressibility of air, the electrodynamic transducers using the prior art are not only bulky, but also have a limited working depth
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[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0043] The invention provides a very low frequency broadband underwater acoustic transducer, which has the advantages of small volume and high working depth, and can realize underwater very low frequency, broadband and high power sound radiation.
[0044] The structure of the very low frequency broadband underwater acoustic transducer developed according to the present invention is as follows: figure 2 As shown, it is cylindrical in shape as a whole, and consists of a pressure-resistant shell, a leaf spring, a piston radiating surface, an air spring, an electromagnetic actuator, an eddy current displacement sensor, an electrical interface board and some connectors.
[0045] The pressure-resistant housing is composed of two parts, a wall surface 7 and a bottom surface 8, which are fixed by bolts; the piston radiation surface 6 is located on the upper en...
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The invention provides an electric acoustic transmitting transducer which has the advantages of small size and high working depth and can achieve underwater very-low-frequency, broadband and high-power sound radiation. The transducer comprises a pressure-resistant shell composed of a wall surface and a bottom surface, and a piston radiation surface near an upper port of the transducer. The piston radiation surface is supported by an air spring installed inside the pressure-resistant shell, and is connected with the wall surface of the pressure-resistant shell through a leaf spring. The air spring is internally equipped with an electromagnetic actuator used for exciting longitudinal vibration of the piston radiation surface to radiate sound waves. The upper part of the electromagnetic actuator is equipped with an eddy current displacement sensor used for monitoring the longitudinal position of the piston radiation surface so as to work with an external air pressure control system to adjust the internal pressure of the air spring to achieve hydrostatic equilibrium of air pressure and water pressure. The hollow part of the bottom surface of the pressure-resistant shell is equipped with an electrical interface board which includes an air valve connected with the external air pressure control system, and electrical interfaces of the electromagnetic actuator and the displacement sensor.
Description
technical field [0001] The invention belongs to the technical field of underwater acoustic transducers, and in particular relates to an electric underwater acoustic emission transducer. Background technique [0002] Acoustic waves are the only known information carrier capable of long-distance underwater transmission. Acoustic methods are the main means of underwater detection, measurement, target identification and positioning, marine geological exploration and many other fields, and their applications are deepening day by day. With the development of modern underwater acoustic technology, the low-end operating frequency of sound waves has been extended to the very low frequency band of tens of hertz in some fields. Therefore, as a necessary tool for the implementation of underwater acoustic technology, very low frequency broadband underwater acoustic transducers, Especially the development of the transmitting transducer is of great significance and value. [0003] Among t...
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IPC IPC(8): H04R1/44
Inventor 安峰岩孙红灵程晓斌杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI