Apparatus for eliminating interference of vibration noise on velocity hydrophone
A vibration noise and hydrophone technology, which is applied in the field of vibration velocity hydrophones, can solve problems such as limiting the use effect of vibration velocity hydrophones, and achieve the effect of improving measurement accuracy and measurement accuracy
Inactive Publication Date: 2013-06-26
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology
[0002] Vibration velocity hydrophones are widely used in underwater acoustic equipment, but for a long time, when installing and using vibration velocity hydrophones on unsteady underwater platforms, due to the influence of the vibration and noise interference of the unsteady platform itself, the vibration velocity hydrophones are limited. The actual use effect of the earphone is mainly due to the fact that the main sensitive element of the vibration pickup part inside the vibration velocity hydrophone is a vibration sensor, and the entire vibration pickup part is suspended on the bracket by a spring and then fixed on the underwater installation platform , when the underwater platform vibrates due to its own instability and is subjected to external forces such as ocean currents, this vibration is coupled to the main sensitive element of the vibration pickup part of the hydrophone through the suspension bracket, spring and other components of the vibration velocity hydrophone, resulting in noise signal
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[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0023] The invention provides a device for eliminating the vibration noise of the vibration velocity hydrophone, which is specifically described below with the typical embodiment that the three-dimensional vibration velocity hydrophone is installed on a cylindrical underwater platform:
[0024] like figure 1 As shown, the cylindrical underwater platform 2 is a nearly rigid sealed cabin with internal reinforcement ribs. After the spring 1a and bracket 1b of the vibration speed hydrophone 1 are assembled, they are fixedly installed on the upper surface of the underwater platform 2. The signal output end of the vibration speed hydrophone 1 introduces the signal into the cabin through the watertight signal cable 5, and It is connected with the input end of the signal conditioning circuit 7 inside the cabin; the vibration monitoring sensor 3 is fastened on ...
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The invention discloses an apparatus for eliminating an interference of vibration noise on a velocity hydrophone. The apparatus employs a vibration monitoring sensor, a signal conditioning circuit and a differential amplification circuit to offset an interference of vibration noise of an underwater platform on a velocity hydrophone, so that measurement accuracy of the velocity hydrophone can be improved. The signal conditioning circuit is employed to adjust amplification factors of output signals of the vibration monitoring sensor and the velocity hydrophone, so that measuring precision of the velocity hydrophone can be substantially improved. And a rheostat is connected between a signal output terminal and a negative input terminal of an operational amplifier that is connected with the vibration monitoring sensor by using a cable; and a user can adjust an amplification factor of the operational amplifier at any time according to an actual demand; therefore, the apparatus is practicaland can be used conveniently and flexibly.
Description
technical field [0001] The invention relates to a vibration velocity hydrophone, in particular to a device for eliminating vibration noise of the vibration velocity hydrophone installed on a rigid, unstable underwater platform. Background technique [0002] The application of vibration velocity hydrophones in hydroacoustic equipment is becoming more and more extensive, but for a long time, when vibration velocity hydrophones are installed and used on unstable underwater platforms, due to the influence of vibration and noise interference of the unstable platform itself, the vibration velocity hydrophone is limited. The main reason for the actual use effect of the hydrophone is: the main sensitive element of the vibration pickup component inside the vibration speed hydrophone adopts the vibration sensor, and the entire vibration pickup component is suspended on the bracket through the spring and then fixed to the underwater installation platform. , When the underwater platform...
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IPC IPC(8): G01H11/06
Inventor 付继伟汪小亚佘湖清陈韶华宋雯婧
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP