A High Sensitivity Fiber Bragg Grating Sensor with Sensitization Effect
A high-sensitivity, fiber grating technology, applied in the direction of using optical devices to transmit sensing components, can solve the problems that cannot be realized and satisfied with more than a thousand channels, large-capacity and distributed networked space load measurement
Active Publication Date: 2018-10-30
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology
[0003] Existing optical fiber sensors based on fiber grating measurement are based on single-point signal measurement as a unit, which cannot realize and meet the requirements of thousands of channels, large-capacity and distributed networked space load measurement.
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[0017] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.
[0018] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.
[0019] The present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the structure of the device will not be partially enlarged acc...
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The invention provides a high-sensitivity fiber grating sensor with sensitizing effect. The high-sensitivity fiber grating sensor comprises a fiber core and a coating layer, wherein the fire core is embedded into the coating layer through a through hole which is formed in the coating layer; the coating layer is of an axis symmetric structure which uses the fiber core as an axis, and sequentially comprises symmetrical flat circular end parts, symmetrical hollow inner layer parts, and a main body part from exterior to interior, and the main body part is clamped between the hollow inner layer parts; a first concave part is spaced between each flat circular end part and the corresponding hollow inner layer part with a first distance, and a second concave part is spaced between the main body part and the corresponding hollow inner layer part with a second distance; a fine groove is arranged in each hollow inner layer part and is vertical to the length direction of the fiber core.
Description
technical field [0001] The invention relates to a fiber grating sensor, in particular to a high-sensitivity fiber grating sensor with a sensitivity enhancement effect. Background technique [0002] Optical fiber sensing technology has been developed for more than 40 years since the 1970s. Optical fiber sensors have the advantages of anti-interference, corrosion resistance, high insulation, wide measurement range, easy multiplexing into a network, and miniaturization. received worldwide attention. Various measurement and control units based on the principle of fiber gratings have been released one after another. Some fiber grating sensing technology achievements have been launched from the laboratory and entered the commercial stage, such as temperature sensors, displacement sensors, strain sensors, stress sensors, acceleration sensors, etc. These sensors have been Successfully used in large-scale structural engineering, electric power engineering, geotechnical engineering, ...
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IPC IPC(8): G01D5/353
CPCG01D5/353
Inventor 祝连庆闫光骆飞何巍刘锋董明利娄小平
Owner BEIJING INFORMATION SCI & TECH UNIV