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Study on bridge weigh in motion (BWIM) system for measuring the vehicle parameters based on strain measurement using FBG sensors
Optical Fiber Technology ( IF 2.7 ) Pub Date : 2020-12-31 , DOI: 10.1016/j.yofte.2020.102440
Sravanthi Alamandala , R.L.N. Sai Prasad , Rathish Kumar Pancharathi , V.D.R. Pavan , P. Kishore

A Weigh in Motion (WIM) system is proposed, employing two fiber Bragg grating (FBG) sensors to evaluate the strain at a point on a prototype bridge due to a moving vehicle. The FBG's are fixed at two different longitudinal girders of bridge along the line of motion at different orientations. The parameters of investigation include strain developed in the proximity of FBG’s and speed of the vehicle. The response has been studied by arranging system of FBG sensors in the form of a rosette. It can be deduced from results that the suggested WIM structure could efficiently monitor variations in the load and speed of advancing vehicles over the bridge. The ideal arrangement of FBG’s in the sensor is found to be that oriented along the bridge axis due to a high sensitivity of 0.36μɛ/gram and linearity with a good coefficient of correlation of about 0.99 than other orientations of FBG. The principal strains obtained from the FBG rosette are in close correlation with the values simulated using numerical tool MATLAB.



中文翻译:

基于FBG传感器的应变测量的桥梁动态称重(BWIM)系统用于测量车辆参数的研究

提出了一种运动称量(WIM)系统,该系统采用两个光纤布拉格光栅(FBG)传感器来评估由于移动的车辆而导致的原型桥上某点的应变。FBG沿着不同方向的运动线固定在桥的两个不同纵向纵梁上。研究的参数包括在FBG附近产生的应变和车辆的速度。通过以玫瑰花结的形式布置FBG传感器系统来研究响应。从结果可以推断出,建议的WIM结构可以有效地监视桥上行进车辆的负载和速度的变化。发现FBG在传感器中的理想排列是沿桥轴定向的,这是因为0.36μl/ g的高灵敏度和线性以及大约为0的良好相关系数。比FBG的其他方向高99。从FBG玫瑰花结获得的主要应变与使用数值工具MATLAB模拟的值紧密相关。

更新日期:2020-12-31
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