Optical fibre grating sensor based on Bourdon tube as energy changer and method thereof

A fiber grating and sensor technology, applied in the field of sensors, can solve the problems of increased failure rate of strain gauges and electrical signal amplification systems, inability to realize real-time separation and detection of pressure and temperature, immature processing technology and modular design, etc., to improve Environmental adaptability and application fields, high reliability, simple modular effect
CN100460825CInactive Publication Date: 2009-02-11INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Publication Date
2009-02-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to optical fiber grating sensor and method based on bourdon tube used as transducer. It includes one bourdon tube pressure transducer, one optical fiber grating cantilever, optical fiber coupler, transmitting optical fiber, package shell, fastening location device, sealing device. The bourdon tube makes its cross section incline to circular under the action of inner pressure, compel free end 13 to make a move which is sent to cantilever 14 to make it flexural strain by connecting point 13. The optical fiber grating 4, 5 pasted under the cantilever 14 are respectively suffered the tension strain or compressive strain epsilon to make optical fiber grating Bragg wave length drift. The tested pressure and temperature can be known by testing the wave length change of the two optical grating.
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Description

technical field

[0001] The invention relates to the technical field of sensors, in particular to a fiber grating sensor and a method based on a Bourdon tube (also called a spring tube) as a pressure transducer. Background technique

[0002] The measurement of pressure and temperature has long been a very important parameter in the modern industrial production process. In petrochemical industry, exploration and production of oil and gas fields, aviation instruments, underwater operations and other fields, electrical quantity sensors are generally used to measure pressure and temperature separately, and then the signals are transmitted to the terminal through cables for signal processing. Due to the poor adaptability of electronic components to harsh environments (every 10°C increase in temperature will double the failure rate of electronic instruments), weak electrical signals are prone to electromagnetic interference (inherently deficient in electromagnetic measurement), spe...

Claims

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