Optical fibre sensor with variable precision

A fiber optic sensor and variable precision technology, applied in the field of sensors, can solve the problems of inability to accurately measure the liquid level in real time, high precision limitations, etc., and achieve variable precision liquid level measurement, high precision accurate measurement, and high measurement accuracy Effect
CN101256089AInactive Publication Date: 2008-09-03XI AN JIAOTONG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2008-09-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a variable-precision optical fiber sensor, which includes a probe, a light source and an optical receiver, the light source and the optical receiver are separately connected with probe through luminiferous medium in luminiferous connection, which is characterized in that the probe is a double optical fiber probe including sensor end, light incidence end and light emergence end, lots of the double optical fiber probes are arranged in a row on the surface, every double optical fiber probe sensor end is arranged according to height difference delta H; the luminiferous medium is cable, which is composed of optical fiber bundle comprising optical fiber induced from light incidence end or light emergence end of every double optical fiber probe; the double optical fiber probe with height difference delta H is arranged in space to form a multi-row with height difference delta H'. The invention can be used for testing liquid level in inflammable and explosive fluid, which has the characteristics of simple structure, low producing cost, strong capability of anti-electromagnetism and anti-interference, and anti-corrosion.
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Description

technical field

[0001] The invention relates to a sensor, in particular to a variable precision optical fiber sensor used for liquid level detection inside flammable and explosive liquids and for measuring deformation and displacement of bridges and dams. Background technique

[0002] In the existing sensor technology field, the detection of the liquid surface position can be roughly divided into electric contact type liquid level sensors, float type liquid level sensors, ultrasonic radar and microwave liquid level sensors. For the electric contact liquid level sensor, because it uses the conductivity of the measured medium to detect the liquid level, it is only limited to the liquid medium with conductive properties, and has direct electrical contact with the measured medium, and is not suitable for easy Liquid level measurement of flammable and explosive liquid media; for float type liquid level sensors, due to the relative movement of mechanical parts, mechanical failures...

Claims

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