A micro-stress sensor for bridge monitoring

A micro-stress and sensor technology, applied in the direction of measuring force, measuring the change of optical properties of the material when it is stressed, and instruments, etc., can solve problems such as difficult to filter out, variable frequency, and unfavorable optical fiber sensors. , to achieve the effects of wide application, small phase detection error, and improved sensing accuracy
CN108955970BInactive Publication Date: 2020-05-22JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2020-05-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a micro-stress sensor for bridge monitoring, and belongs to the technical field of optical fiber sensors. The sensor is mainly provided with a pumping source (1), an optical wavelength division multiplexer (2), and an erbium-doped optical fiber (3). The sine signal is used as a modulation signal, high-frequency interference cannot be generated, and the sensor has the advantages of being more reliable in work, and high in sensing precision.
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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 used for bridge monitoring. 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 technol...

Claims

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