A polymer optical fiber monitoring device and method for road cracks
A technology of polymer and optical fiber, which is applied in the field of road structure disease monitoring, can solve the problems of crack detection, optical fiber sensing technology cannot be popularized and used on a large scale, and the monitoring range is small, so as to achieve the effect of improving the service life
Active Publication Date: 2020-09-22
CHANGAN UNIV
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However, the silica fiber is relatively thin, the fiber is relatively fragile, and the maximum elongation rate is less than 1%. The fiber will break when the crack cracks to 4mm, and the monitoring range is small.
The survival rate of optical fiber is low in the rough construction environment. These shortcomings prevent the large-scale promotion and use of optical fiber sensing technology. Therefore, it is necessary to develop a road crack monitoring device to improve the service life of the optical fiber sensor. In addition, it needs to be explained Yes, the existing monitoring devices cannot detect cracks in all directions. Because polymer optical fibers have certain ductility, it is necessary to develop a road crack monitoring device based on polymer optical fibers, which will greatly improve the performance of optical fiber sensors. service life
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[0026] The present invention is described in further detail below in conjunction with accompanying drawing:
[0027] refer to figure 1 and figure 2 , the polymer optical fiber monitoring device of the present invention includes a first polymer optical fiber sensor 6, a second polymer optical fiber sensor 7, an optical time domain reflectometer 8 and a monitoring computer 9, wherein the first polymer optical fiber sensor 6 is located between the base layer 1 and the lower layer 2, the second polymer fiber optic sensor 7 is located between the lower layer 2 and the upper layer 3, the first polymer fiber optic sensor 6 and the second polymer fiber optic sensor 7 both include the first polymer fiber sensor Optical fiber 11, the second polymer optical fiber 12 and the third polymer optical fiber 13, wherein, the first polymer optical fiber 11 is in a parabolic structure, and the two ends of the first polymer optical fiber 11 are located on the passing lane, the first polymer opti...
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The invention discloses a device and method for monitoring road cracks with a polymer optical fiber. The first polymer optical fiber has a parabolic structure, and the two ends of the first polymer optical fiber are located on the passing lane, and the middle part of the first polymer optical fiber is located on the driving lane. , both the second polymer optical fiber and the third polymer optical fiber have a sinusoidal structure, and the peak of the second polymer optical fiber is facing the trough of the third polymer optical fiber, and the trough of the second polymer optical fiber is facing the third polymer optical fiber The peak of the wave, the end of the first polymer fiber, the end of the second polymer fiber and the end of the third polymer fiber are all connected to the optical time domain reflectometer, and the optical time domain reflectometer is connected to the monitoring computer. The device and method can realize the monitoring of road cracks based on the polymer optical fiber, and can monitor cracks in various directions.
Description
technical field [0001] The invention belongs to the technical field of road structure disease monitoring, and relates to a device and method for monitoring road cracks with a polymer optical fiber. Background technique [0002] During the operation period, roads will be affected by various natural disasters and the wear and tear of vehicles, among which cracks are the most common and seriously affected road diseases. [0003] Road crack monitoring technology is the key to road operation management and post-maintenance repair. Through effective monitoring technology, managers can timely grasp the information of road cracks, so as to evaluate the damage state and safety performance of the pavement structure, and make appropriate maintenance decisions to prevent further damage to the pavement and improve the level of operation and management. For quite a long period of time, the acquisition of pavement crack information mainly relied on manual detection. This method is time-c...
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IPC IPC(8): E01C23/01G01D5/353
CPCE01C23/01G01D5/353
Inventor 张久鹏郭栋裴建中李蕊朱存贞陈旭
Owner CHANGAN UNIV