Micro stress sensor based on phase comparison

A phase comparison and micro-stress technology, applied in instruments, measurement force, and force measurement by measuring the change of optical properties of materials under stress, etc. question
CN109238533AInactive Publication Date: 2019-01-18JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN UNIV
Publication Date
2019-01-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a micro stress sensor based on phase comparison, and belongs to the technical field of optical fiber sensors. The main structure of the micro stress sensor comprises a pumping source (1), an optical wavelength division multiplexer (2), an erbium doped optical fiber (3), and the like. The micro stress sensor provided by the invention uses a sinusoidal signal as a modulation signal, thereby generating no high frequency interference, and having the characteristics of more reliable work, high sensing precision, wide application range, etc.
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Description

technical field

[0001] The invention belongs to the technical field of optical fiber sensors, in particular to a micro stress sensor based on phase comparison. Background technique

[0002] Fiber Bragg grating (FBG) is widely used in the field of sensing technology due to its advantages of anti-electromagnetic interference, chemical resistance, small transmission loss, small size and light weight, and easy mass production. At present, stress sensors are widely used in the field of engineering technology. Especially in emerging fields such as nanoparticle interaction and cell mechanics, there is an urgent need for micro-stress sensors, and the safety monitoring of bridges, tunnels, and building structures is inseparable from micro-stress sensors. Due to the above-mentioned advantages of the fiber Bragg grating, the stress sensor formed by it has higher reliability than other sensors, and is more suitable for use under harsh conditions.

[0003] The closest existing technolo...

Claims

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