GAO Jun-qi1, CHEN Hao1, JI Tian-jian1, et al. Study of dynamic hydraulic pressure measurement on asphalt pavement using fiber-optic Sensing[J]. 2009, 28(9): 59-61.
GAO Jun-qi1, CHEN Hao1, JI Tian-jian1, et al. Study of dynamic hydraulic pressure measurement on asphalt pavement using fiber-optic Sensing[J]. 2009, 28(9): 59-61. DOI: 10.13873/j.1000-97872009.09.025.
沥青路面动水压力光纤传感测量研究
摘要
基于光纤Bragg光栅(FBG)传感原理
设计了一种动水压力光纤传感器
介绍了其压力传感原理
并推导了该传感器波长漂移与压力之间的关系。通过室内试验
对动水压力光纤传感器进行了标定
传感器的压力灵敏度为6.0255 nm/MPa。现场测量试验表明:在车辆以20
8
0 km/h的速度行驶时
动水压力作用时间在0.04
0
.016 s。随着车速增加
动水压力存在时间越短。动水压力数值随着车速的增大而增加
车速为20 km/h时
动水压力为0.085 MPa;80 km/h时
动水压力达到0.234 MPa。
Abstract
A fiber-optic dynamic hydraulic pressure sensor(FODHPS)is designed based on the principle of fiber Bragg grating(FBG)sensing
and its pressure sensing principle is presented.The theoretical correlation between the applied pressure and the center wavelength shift of the FODHPS is derived.Before the field test
a calibration test for FODHPS is implemented
and the pressure sensitivity coefficient of FODHPS is 6.0255nm/MPa.Measurement results show when a car moves at the speed of 20
8
0km/h
the duration of the dynamic hydraulic pressure is 0.04
0
.016s.The time presence of dynamic hydraulic pressure would decrease with the increment of car’s speed.The dynamic hydraulic pressure in asphalt pavement is 0.085MPa wh
ile a car moves at the speed of 20km/h;the dynamic hydraulic pressure in asphalt pavement is 0.234MPa while a car moves at the speed of 80km/h.