Sponge city permeable pavement water level monitoring system based on fiber bragg grating
A fiber grating, permeable pavement technology, applied in permeability/surface area analysis, liquid level indicators for physical variable measurement, roads, etc., can solve problems such as weakening water permeability, and achieve accurate judgment and good monitoring effects.
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[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] see Figure 1 to Figure 4 , a water level monitoring system for sponge city permeable pavement based on fiber grating, including at least one monitoring unit 2, the monitoring unit 2 is buried under the permeable pavement 1, and the monitoring unit 2 is connected to the signal processing device 3 via an optical cable 33 ;
[0029] A single monitoring unit 2 includes at least two fiber grating temperature sensors 4, all fiber grating temperature sensors 4 are arranged sequentially along the direction of gravity, and adjacent fiber grating temperature sensors 4 are connected in series;
[0030] A single fiber grating temperature sensor 4 includes an aluminum housing 41 and an optical fiber 42. A grating area 421 is provided on the optical fiber 42 at a position inside the aluminum housing 41. A grating 422 is arranged in the gra...
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