Static pressure self-compensation optical fibre grating sonic device

A fiber grating and hydrophone technology, applied in the direction of instruments, using optical devices to transmit sensing components, measuring devices, etc., can solve the problems of difficult measurement of large pressure, complicated process, poor ability to resist hydrostatic pressure, etc., and achieve a small volume. , The effect of improving static pressure resistance and volume reduction

Inactive Publication Date: 2008-07-02
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

The optical fiber pressure sensor produced in this way requires prestressed bonding of optical fibers, and adopts point bonding, the process is complicated, the linear diaphragm is thin, it is difficult to measure high pressure, and it is more sensitive to temperature changes. At the same time, the ability to resist hydrostatic pressure also poor

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  • Static pressure self-compensation optical fibre grating sonic device

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] Such as figure 1 as shown, figure 1 The structure diagram of the static pressure self-compensating fiber grating hydrophone provided by the present invention, the main body of the fiber grating hydrophone is a cylindrical support tube 10 with an axially symmetrical structure, and the fiber grating hydrophone includes: The fiber grating 20 at the inner axis of the support cylinder 10 is used to measure underwater sound; the first piston 21 and the second piston 22 respectively installed at both ends of the fiber grating 20 are used to transmit the water sound pressure to the fiber grating 20; The first fiber hole 13 and the second fiber hole 14 in the central axis of both ends of the support cylinder 10 are used to...

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Abstract

The invention discloses an optical fiber grating hydrophone with static pressure self-compensation, belonging to the technical field of an optical fiber sensor. The main body of the optical fiber grating hydrophone is a cylindrical supporting canister (10) in axial symmetrical structure. The optical fiber grating hydrophone comprises an optical fiber grating (20) disposed at the central axis line in the supporting canister (10) and used for measuring underwater sound; a first piston (21) and a second piston (22) respectively disposed at the two ends of the optical fiber grating (20) and used for transmitting the underwater sound pressure to the optical fiber grating (20); a first optical fiber hole (13) and a second optical fiber hole (14) respectively opened at the centers of the two ends of the supporting canister (10) in axial direction and used for leading out a tail fiber of the optical fiber grating (20). The invention improves the hydrostatic proof ability of the optical fiber grating hydrophone without the cost of the high sensitivity.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a static pressure self-compensating optical fiber grating hydrophone. Background technique [0002] Compared with the corresponding conventional sensors, optical fiber sensors also have obvious advantages in terms of sensitivity, dynamic range, and reliability. They are particularly prominent in the fields of national defense and military applications, and are listed as key national defense technologies by many countries. [0003] Optical fiber hydrophone is an instrument that detects signals such as pressure and sound in liquids by using the light transmission characteristics of optical fiber and various modulation effects generated by its interaction with the surrounding environment. Compared with traditional piezoelectric sensors, it has the following main advantages: wide frequency band, high sound pressure sensitivity, no electromagnetic interference, light wei...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G01D5/353
Inventor 张文涛刘丽辉李芳刘育梁
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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