A High Precision Temperature Sensor

A temperature sensor, high-precision technology, applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problems of signal phase-frequency characteristics, unfavorable optical fiber sensors, and variable frequency, etc., to achieve small phase detection errors , Wide range of applications, reliable results
CN109029772BInactive Publication Date: 2019-09-27JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2019-09-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

A high-precision temperature sensor of the invention belongs to the technical field of optical fiber sensors. Its main structures include a pump source (1), an optical wavelength division multiplexer (2), an erbium-doped optical fiber (3) and the like. The invention uses a sinusoidal signal as a modulation signal, does not generate high-frequency interference, and has the characteristics of more reliable operation, high sensing precision, wide application range and the like.
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Description

Technical field

[0001] The invention belongs to the technical field of optical fiber sensors, and particularly relates to a high-precision temperature sensor. Background technique

[0002] Fiber Bragg grating (FBG) is widely used in the field of sensing technology because of its advantages such as anti-electromagnetic interference, chemical resistance, low transmission loss, small size and light weight, and easy mass production. At present, temperature sensors play an important role in safe production, especially in high-risk places such as mines, where temperature monitoring is essential. However, most of the traditional temperature sensors are realized by changes in electrical signals, while temperature sensors based on changes in electrical signals are greatly restricted in practical applications. On the one hand, the use of electrical signals can cause problems in certain environments (such as coal mines). Additional security risks, on the other hand, when used in harsh envi...

Claims

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