Light quantum technology-based high-sensitivity fiber grating sensing method and system

A fiber grating and high-sensitivity technology, applied in the field of high-sensitivity fiber grating sensing, can solve problems such as difficult-to-reach sensor position information, accurate acquisition of sensing information, high-precision demodulation, etc., to achieve accurate acquisition, improve spatial positioning accuracy, and improve The effect of sensitivity
CN110823262AInactive Publication Date: 2020-02-21UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONIC SCI & TECH OF CHINA
Publication Date
2020-02-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a light quantum technology-based high-sensitivity fiber grating sensing method and system. A single photon detector is used for substituting a traditional photoelectric conversion device, a time digital converter is used for performing coincidence counting reflection photons, the drift size of a central wavelength of the fiber grating sensor can be further calculated according to a counting value of the reflection photons, the physical information change size of a measurement region is further demodulated, the output moment of an electrical signal is recovered on time by the time digital converter and the signal processing system to obtain a space position of the fiber grating, so that space position information of which physical information is changed is acquired,and distributed sensing positioning is achieved. By the method, accurate acquisition of the sensor position information and high-accuracy demodulation of the corresponding sensing information are achieved.
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Description

technical field

[0001] The invention belongs to the technical field of fiber grating sensing, and in particular relates to a high-sensitivity fiber grating sensing method based on light quantum technology. Background technique

[0002] Quasi-distributed optical fiber sensing technology uses optical signals to simultaneously detect physical information such as temperature, pressure, strain, and stress at multiple points. Compared with traditional electronic sensors, it has strong anti-electromagnetic interference, good electrical insulation performance, corrosion resistance, With the advantages of high sensitivity and large transmission capacity, it has been widely used in bridge detection, fire early warning, oil pipeline detection, building safety detection and other fields.

[0003] One of the biggest advantages of fiber optic sensing technology is that hundreds of fiber grating sensors can be connected in series on a single fiber and time-division multiplexing technology ...

Claims

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