岩土力学Issue(11)：3340-3344,5.
双膜式光纤Bragg光栅土压力传感器的研究
Dual-diaphragm fiber Bragg grating soil pressure sensor
摘要
Abstract
A dual-mode fiber Bragg grating soil pressure sensor is invented on the basis of dual membrane oil cavity structure. Biasing pressure experiments are done with this kind of soil pressure sensor. The results show that the sensor can effectively distribute the soil pressure between the sensor and its contacting segment evenly. Under soil pressure, the first diaphragm deflection passes the pressure on to the second diaphragm via transferring pressure oil. The transfer lever and the equal strength cantilever are rigidly connected. The central deflection of the second diaphragm pushes the transfer lever timely, which exerts a equal size defection on the free end of the equal strength cantilever. Then soil pressure could be obtained by the wavelength shift of fiber Bragg grating, which is pasted on the surface central axis of equal strength cantilever. The loading experiment indicates that the sensitivity of dual-mode optical fiber Bragg grating soil pressure sensor is 412.7 pm/MPa;the nonlinearity error is 1.97%FS;and the repeatability error is 3.68%FS.关键词
光纤Bragg光栅/传压油腔/双膜式/土压力/波长移位Key words
fiber Bragg grating/transmitting pressure oil chamber/dual-diaphragm/soil pressure/wavelength shift分类
信息技术与安全科学引用本文复制引用
陈富云,李川,陈尔阔,熊新,李英娜..双膜式光纤Bragg光栅土压力传感器的研究[J].岩土力学,2013,(11):3340-3344,5.基金项目
省应用基础研究计划项目(No.2013FZ021)。 （No.2013FZ021）
