Piston type optical fibre grating sonic device

A fiber grating and hydrophone technology, which is applied in instruments, metering and measuring devices by measuring the changing force of optical properties of materials when they are stressed, can solve the problems of affecting signal detection, discomfort, and limited static pressure. Increased sensitivity, increased height, and reduced volume effects

Inactive Publication Date: 2010-02-03
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The fiber optic pressure sensor manufactured in this way is easy to cause the fiber grating to chirp and bend due to the pressure of the fiber grating, which not only limits the sensitivity of the hydrophone, but also affects the detection of the signal
At the same time, the fiber grating hydrophone only relies on the polymer itself to resist static pressure, and the static pressure it can withstand is limited, so it is not suitable for working in a deep environment

Method used

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  • Piston type optical fibre grating sonic device
  • Piston type optical fibre grating sonic device

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0033] like figure 1 and figure 2 as shown, figure 1 The structural sectional view of the piston type fiber grating hydrophone provided by the present invention, figure 2 It is a side sectional view of the middle part of the piston-type fiber grating hydrophone provided by the present invention.

[0034] The fiber grating hydrophone includes: a support cylinder 10 as the main body of the hydrophone; a protective sleeve 20 sleeved on the surface of the support cylinder 10 for protecting the structure inside the support cylinder 10 and the support cylinder 10; The first piston and the second piston 40 inside the cylinder 10 are used to sense the pressure and generate displacement along the normal direction of the pisto...

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Abstract

The invention relates to the fiber sensor technical field and discloses a plunger type fiber raster hydrophone. The fiber raster hydrophone comprises a support cylinder, a protective sleeve, a first piston, a second piston and a fiber raster, wherein, the support cylinder is used as a main body of the hydrophone; the protective sleeve is sleeved on the surface of the support cylinder and used forprotecting the support cylinder and an inner structure of the support cylinder; the first piston and the second piston are symmetrically arranged inside the support cylinder and used for sensing pressure and producing displacement along the normal directions of the pistons under the action of the pressure; and the fiber raster for measuring underwater sound pressure is arranged inside the supportcylinder and runs through the first piston and the second piston. When the plunger type fiber raster hydrophone is utilized, the plunger type fiber raster hydrophone improves high-sensitivity and canoperate in different hydrostatic environments.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a novel piston-type optical fiber grating hydrophone. Background technique [0002] Compared with the corresponding conventional sensors, fiber optic sensors 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 weight, can be designed in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00G01L1/24
Inventor 张文涛李芳刘丽辉刘育梁
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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