Optical fiber grating displacement sensor

A technology of displacement sensor and optical fiber grating, which is applied in the field of sensing, can solve the problems of poor long-term stability and susceptibility to electromagnetic interference, etc., and achieve the effect of convenient construction and installation, low cost and small size
CN1743795AInactive Publication Date: 2006-03-08DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2006-03-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention provides a contact type optical fiber grating displacement sensor, which contains support, protective steel pipe, spring and optical fiber grating strain sensor constructed of double steel pipe assembly structure, wherein the optical fiber grating packaged in 0.5mm steel pipe by epoxy resin and forming the optical fiber grating strain sensor with two 1.2mm steel pipe. Said invention has advantages of overcoming the shortage of current sensor of easy interfered by electromagnet and poor stability.
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Description

technical field

[0001] The invention belongs to the field of sensing technology and relates to a displacement sensor based on fiber grating technology. Background technique

[0002] In civil engineering, the commonly used displacement sensors are strain gauge displacement sensors. It can be used in conjunction with secondary instruments such as strain gauges and digital voltmeters to measure static displacement in engineering tests. Since its core sensing element adopts electric strain gauge, it inevitably brings the shortcomings of being susceptible to electromagnetic radiation interference and poor long-term stability, and cannot meet the working needs of harsh working environments such as strong electromagnetic radiation.

[0003] Fiber Bragg grating is a strain sensing element with excellent performance. It has the advantages of high sensitivity, small size, corrosion resistance, anti-electromagnetic radiation, flexible optical path, and is convenient for long-distance...

Claims

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