【摘要】 以树脂C-UV 9400E材料设计了一种简单实用的高密度触压感知单元,将1 cm~2的范围平均地分为9个区域并竖直封装9支光纤布拉格光栅(FBG)传感器。通过FBG中心波长变化量的监测,实现触压变化感知和位置对称性检测,从而对加载位置点进行判定。对1、2、5位置进行0～10 N的加载实验研究,有限元仿真产生的现象与实验现象一致。实验结果表明,所加载位置点对应的FBG中心波长偏移量最大,平均线性相关系数为0.998 1。对位置1处的FBG传感器进行感知信号对称性实验研究,结果表明,在其两组对称位置2和4,位置6和8的感知灵敏度比值分别为1.022和0.78,实现了位置对称性检测。研究结果为以后进一步研究大型FBG传感网络的精准定位提供了理论基础。更多还原

【Abstract】 This work has developed a high-density pressure sensing unit of an area of 1 cm~2 printed by resin C-UV 9400 E. This unit is divided into nine regions averagely and nine fiber Bragg grating sensors(FBGs)are embedded vertically. By measuring the FBGs’ wavelength shifts, the sensing unit can detect the loading location. A number of experiments have been carried out to perceive the pressure fluctuation and test the position symmetry by loading on the No. 1,2 and 5 locations with a range from 0～10 N. The phenomena of finite element simulation are consistent with the experimental phenomena. The experimental results show that the FBGs’ wavelength shifts on the loading location are larger than them on the other locations. The average linear correlation coefficient of the FBGs’ response is 0.998 1. Two groups of position symmetry experiment on No. 1 location indicate that the ratios of the sensitivity between No.2 and No.4 location, No.6 and No.8 location are 1.022 and 0.78,respectively. The experimental results can provide a basis for further research on the precise localization using large-scale FBG sensing network.更多还原