An optical fiber macrobending pressure sensor and its measurement system

A pressure sensor, optical fiber macrobending technology, applied in the direction of measuring force, measuring device, instrument, etc., can solve the problems of difficult popularization and application, high cost, low yield, etc., and achieves simple modulation and demodulation method, simple structure, signal The effect of less processing

CN109186825BActive Publication Date: 2021-02-02HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-02-02

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Abstract

The invention discloses an optical fiber macrobending pressure sensor and a measuring system thereof. The sensor includes a housing, an elastic diaphragm, a bracket, a sleeve, a dowel rod, an optical fiber, an incident optical fiber through hole, and an outgoing optical fiber through hole. The bottom of the housing is fixed with an elastic diaphragm, and the bracket is fixed inside to fix the sleeve, and the top is provided with a through hole for incident optical fiber; the dowel rod passes through the sleeve, one end is fixed on the center of the elastic diaphragm, and the other end is fixedly connected to the outgoing optical fiber The optical fiber passes through the incident optical fiber through hole and the outgoing optical fiber through hole to form a macrobend section of the optical fiber; the sensor and its measurement system use a combined structure of an elastic diaphragm and an optical fiber macrobend, as well as a photodiode that converts optical signals into electrical signals. Realize the measurement of pressure. The optical fiber macrobending pressure sensor provided by the invention has the advantages of simple structure, easy processing, low price, intrinsic safety and corrosion resistance, and has broad application prospects in the fields of petrochemical, civil engineering and water conservancy, aerospace and the like.
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Description

technical field

[0001] The invention relates to the technical field of pressure sensors and optical fiber sensing, in particular to an optical fiber macrobending pressure sensor and a measurement system thereof. Background technique

[0002] Optical fiber sensor is a sensing technology developed rapidly along with the development of optical fiber communication technology. It has the advantages of small size, light weight, high sensitivity, intrinsic safety, anti-electromagnetic interference, corrosion resistance, and long life. Through appropriate modulation and demodulation methods, fiber optic sensors can realize the measurement and long-term online monitoring of multiple physical quantities and parameters such as temperature, pressure, strain, acceleration, displacement, flow, electric field, magnetic field, etc., and thus have been widely researched and applied.

[0003] In harsh environments such as high temperature, high pressure, corrosion, flammability, explosion, an...

Examples

Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] The purpose of the present invention is to use the excellent characteristics of optical fiber macrobend sensing technology, adopt the combination structure of elastic diaphragm and optical fiber macrobend, and provide a kind of optical fiber with simple structure, easy processing, simple modulation and demodulation method, and low price. Macrobend pressure sensor and its measurement system.

[0029] In order to make the above objects, features and advan...