Asphalt pavement intelligent monitoring system based on fiber bragg grating sensing
A technology of asphalt pavement and optical fiber grating, which is applied in the direction of using optical devices to transmit sensing components, etc., and can solve problems such as road structure health monitoring, durability, long-term stability, electromagnetic interference, etc.
Pending Publication Date: 2021-05-04
WUHAN WUTOS
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Problems solved by technology
They generally have high sensitivity and accuracy, but there are problems of durability, long-term stability and electromagnetic interference, which cannot meet the needs of pavement structural health monitoring.
In recent years, the application of Fiber Bragg Grating (FBG) sensing in the field of civil engineering has been paid attention to. It has the advantages of high sensitivity, anti-electromagnetic interference, simple structure, small size and good stability. It has been used in road monitoring. It is still in the experimental stage in terms of asphalt pavement structure
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] like figure 1 As shown, the asphalt pavement intelligent monitoring system of the fiber grating sensor of the embodiment of the present invention, the system includes:
[0032] The fiber grating sensor is a passive temperature and strain multiplexing fiber grating sensor, which is embedded in the base layer and surface layer of the asphalt pavement respectively;
[0033] For the sensor embedding method, specifically, the part below the asphalt pavement is a fiber optic grating sensor, which is buried under the asphalt road, specifically two buried at the base layer and two below the surface...
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The invention discloses an asphalt pavement intelligent monitoring system based on fiber bragg grating sensing, and the system comprises: fiber bragg grating sensors, which are passive temperature and strain multiplexing type fiber bragg grating sensors and are respectively embedded in a base layer and a surface layer of an asphalt pavement; a camera, which is arranged on the asphalt pavement; a fiber bragg grating demodulator, which is connected with a grating sensor through a single-mode optical cable and is used for acquiring and demodulating the temperature, strain and vibration information acquired by the fiber bragg grating sensor, and combines an asphalt pavement damage mechanismto establish an intelligent monitoring database of the asphalt pavement according to the demodulated signal characteristics so as to monitor the vehicle load and speed; and a monitoring end, which is used for displaying the demodulation result of the fiber bragg grating demodulator in real time and is linked with a camera on the road surface to complete monitoring on the road surface.
Description
technical field [0001] The invention relates to the field of optical fiber sensing, in particular to an intelligent monitoring system for asphalt pavement based on optical fiber grating sensing. Background technique [0002] Most highways in my country use asphalt concrete pavement. The early failures of expressway pavement, such as cracks, water damage and potholes, etc., are mostly closely related to the load on the road surface. Therefore, it is necessary to study a set of asphalt pavement load monitoring system to realize the monitoring of vehicle load and speed, and to explore the mechanism and development law of pavement damage. [0003] At present, the sensors for measuring road load monitoring mainly include strain gauge load cells, hydraulic piston load cells, spring load cells and piezoelectric load cells. They generally have high sensitivity and precision, but there are problems of durability, long-term stability and electromagnetic interference, which cannot me...
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IPC IPC(8): G01D5/353
CPCG01D5/353
Inventor 明昌朋于本化张轶虎王越罗显庭靖静
Owner WUHAN WUTOS