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High-sensitivity underwater acoustic detection device based on telescope system and method

A telephoto system and underwater acoustic wave technology, applied in the field of ultrasonic detection, can solve problems such as unacoustic signal processing, and achieve the effect of improving sensitivity and low cost

Inactive Publication Date: 2019-08-16
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods for improving the sensitivity of the hydrophone only improve the structure and type of the hydrophone, and do not process the acoustic signal.

Method used

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  • High-sensitivity underwater acoustic detection device based on telescope system and method
  • High-sensitivity underwater acoustic detection device based on telescope system and method

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] like figure 2 As shown, a high-sensitivity Mach-Zehnder interference fiber optic hydrophone detection device based on the Cassegrain telescopic system of this implementation example,

[0025] a laser for generating a frequency stabilized laser beam;

[0026] The coupler 1 is used to split the light emitted by the laser so that it enters the signal arm and the reference arm respectively;

[0027] The signal arm optical fiber converts the underwater acoustic vibration into the phase change of the laser in the optical fiber;

[0028] Reference arm optical fiber, the laser in the optical fiber is not affected by underwater acoustic vibration, it is the reference light;

[0029] Coupler 2, which couples the laser light emitted from the signal arm and the reference arm to the detector;

[0030] The detector collects the interference lig...

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Abstract

The invention discloses a high-sensitivity underwater acoustic detection device based on a telescope system and a method, and belongs to the field of acoustic detection. The method introduces the telescope system to focus an underwater ultrasonic signal, so as to improve the sensitivity of the underwater acoustic detection device. Specifically, the measured acoustic signal is focused by the telephoto system, so that the sound pressure is enhanced at the focus position. When an acoustic sensitive unit of a conventional underwater acoustic detection device is placed at the focus position of thetelephoto system, the acoustic sensitivity can be greatly improved. The method of the invention is simple in principle and applicable for any form of underwater acoustic detection devices in principle.

Description

technical field [0001] The invention belongs to the field of ultrasonic detection, in particular to a high-sensitivity underwater acoustic wave detection device and method based on a telescopic system. Background technique [0002] Compared with other physical fields, sound waves have better directionality in water propagation, less attenuation, and the longest transmission distance. Therefore, the acoustic signal can be used as an effective carrier to obtain underwater information, and use it for long-distance information and energy transmission. Underwater acoustic wave detectors (also known as hydrophones) convert acoustic vibrations into electrical signals, and after processing the electrical signals, they can be demodulated to obtain the information of the acoustic signals. Hydrophones are of great significance to the development of underwater emergency rescue and shipwreck salvage equipment, underwater communication and research on marine physics, deep sea exploration...

Claims

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Application Information

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IPC IPC(8): G01H9/00G01H11/04G01H11/08G01H11/06
CPCG01H9/004G01H11/04G01H11/06G01H11/08
Inventor 吴永前陈小君刘锋伟闫峰涛赵彦肖向海徐燕张娟
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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