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Hydrophone based on ribbon grating array, manufacturing method and sound pressure detection method

A grating array, hydrophone technology, applied in grating fibers, instruments, cladding fibers, etc., can solve the problems of difficulty in achieving high sensitivity and water pressure resistance at the same time, and achieve the effects of improving detection capability, increasing contact area, and increasing gain.

Active Publication Date: 2022-05-17
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, the existing optical fiber hydrophone structure is difficult to achieve the application requirements of high sensitivity and water pressure resistance at the same time

Method used

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  • Hydrophone based on ribbon grating array, manufacturing method and sound pressure detection method
  • Hydrophone based on ribbon grating array, manufacturing method and sound pressure detection method

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] Such as figure 1 and 2 The shown hydrophone based on a grating array includes a steel strand 1, an elastic sensitization layer 2, and an optical fiber 3 with a grating array. The elastic sensitization layer 2 wraps the steel strand 1, the steel strand 1 and the elastic The sensitizing layer 2 together forms the mandrel of the hydrophone, and is wound on the elastic sensitizing layer 2 with grating array optical fiber 3 and equal pitch (the equal pitch can ensure the positioning accuracy of each measuring area of ​​the hydrophone, and the winding can improve the unit The length of the optical fiber within the length of the hydrophone increases the sensitivity of the hydrophone), and two adjacent gratings 3.1 in each optical fiber with a grating array optical fiber 3 form an underwater sound pressure signal measurement area for sensing und...

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Abstract

The invention discloses a hydrophone based on a ribbon grating array, which comprises a steel strand, an elastic sensitization layer and ribbon grating array optical fibers, the elastic sensitization layer wraps the steel strand, the steel strand and the elastic sensitization layer jointly form a mandrel of the hydrophone, the ribbon grating array optical fibers are wound on the elastic sensitization layer at equal pitch, and the ribbon grating array optical fibers are wound on the elastic sensitization layer. And two adjacent gratings in each optical fiber of the optical fiber with the grating array form an underwater sound pressure signal measuring area. According to the invention, high-sensitivity and water-pressure-resistant distributed optical fiber hydrophone detection can be realized.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber sensing, in particular to a hydrophone based on a parallel band grating array, a manufacturing method and a sound pressure detection method. Background technique [0002] With the continuous improvement of the working depth and shock and noise reduction technology of underwater targets such as submarines and underwater vehicles, higher requirements are put forward for the water pressure resistance and sensitivity of hydrophones. Therefore, there is an urgent need for a new type of underwater acoustic sensor monitoring network with high sensitivity and water pressure resistance. [0003] Traditional piezoelectric hydrophones are limited in marine application environments due to problems such as lack of immunity to electromagnetic interference, low sensitivity, and poor signal-to-noise ratio. The optical fiber hydrophone detects through the modulation of the underwater sound press...

Claims

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Application Information

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IPC IPC(8): G01H9/00G02B6/02
CPCG01H9/004G02B6/02057Y02A90/30
Inventor 李政颖王昌佳王立新桂鑫王一鸣高会王艺斌
Owner WUHAN UNIV OF TECH