Intelligent signage and boundary marker condition monitoring system based on fiber grating sensor array
A sensor array and fiber grating technology, applied in the field of intelligent signage and boundary marker condition monitoring system, can solve the problems of single function, inability to perceive the outside world, inability to illegal construction and damage detection of underground optical cables, and achieve intelligent and reasonable structure. Effect
Active Publication Date: 2022-07-19
WUHAN UNIV OF TECH
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Problems solved by technology
[0002] Signs and boundary markers have been widely used in people's daily life, but their functions are single, mainly playing the role of signs and warnings
For example, the signs indicating that there are optical cables buried underground are only for warning, and cannot detect illegal construction and destruction affecting underground optical cables.
Boundary monuments are used as markers to indicate the location of the boundary on the straight boundary, which only serve as a sign and cannot perceive illegal damage from the outside world
Method used
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Embodiment 2
[0022] In the second embodiment of the present invention, the composite housing 12 of the sensor 1 is provided with a section of optical fiber 2, and the section of the optical fiber 2 is engraved with a low-reflection chirped grating pair Fabry-Perot F-P resonant cavity 17, so The Bragg grating of the low-reflectivity FBG temperature and strain sensor 16 is written on the lead-out portion of the optical fiber 2; the low-reflectivity chirped grating can pick up the vibration signal generated by the illegal construction around the Fabry-Perot F-P resonator 17 , when the external environment (such as strain, etc.) changes, the sensor cavity length will change accordingly, the signal demodulator 3 demodulates the signal, and obtains the environmental parameter change to be measured through the change in the cavity length. The interference spectrum of the fiber grating Fabry-Perot sensor is cosine distributed, and the sensor cavity length can be obtained by the Fourier method. Sinc...
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The invention relates to the technical field of optical fiber sensing and monitoring, in particular to an intelligent signage and boundary marker condition monitoring system based on a fiber grating sensing array; comprising a plurality of sensing modules, a signal demodulator, a data processing unit and a computer, The sensing modules are respectively implanted in the signs or boundary markers. The sensing modules include vibration sensors, temperature and strain sensors based on optical fiber sensing technology. Several sensors are sequentially fused through optical fibers to form a fiber grating sensing array. The fiber grating sensing array, signal The demodulator, the data processing unit and the computer are connected in sequence to form a real-time monitoring system; the present invention has a reasonable structure, and applies the fiber Bragg grating sensing array to the signage and boundary markers, picks up the vibration signals generated by the surrounding illegal construction, and uses the fiber Bragg grating to sense the vibration signals. For the stress and strain information generated by being moved or destroyed, the time division multiplexing positioning and demodulation method can be used to monitor the surrounding environment of the sign and the boundary monument online, realizing the intelligence of the sign and the boundary monument.
Description
technical field [0001] The invention relates to the technical field of optical fiber sensing and monitoring, in particular to an intelligent identification signage and boundary marker condition monitoring system based on a fiber grating sensing array. Background technique [0002] Sign boards and boundary markers have been widely used in people's daily life, but their functions are single, mainly playing the role of identification and warning. For example, the sign indicating that the optical cable is buried underground only has the function of warning, and cannot detect the illegal construction and damage around the underground optical cable. The boundary monument is used as a marker to indicate the location of the boundary on the straight boundary, and it only plays the role of marking, and cannot sense the illegal destruction of the outside world. How to prevent signs and boundary markers from being illegally destroyed and monitor their safety status has always been a he...
Claims
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IPC IPC(8): G01D21/02G01D5/353
CPCG01D21/02G01D5/35312G01D5/35316
Inventor 童杏林许欧阳熊家国邓承伟张翠李雪
Owner WUHAN UNIV OF TECH