CAJ | 학술논문

针对现有土压力传感器无法实现长期、实时监测的要求,设计了温度补偿式光纤光栅土压力传感器.选用有硬中心的平膜片作弹性元件,选用灵敏度高、体积小、质量轻、易于波分复用和组成传感网络的光纤光栅作敏感元件;同时采用了不受力光栅法进行了温度补偿.经实验测试,该传感器的灵敏度为1.5 nm/MPa;线性度误差为0.35%;重复性为0.06%;迟滞为2.19%;静态误差为2.21%;这些指标能够满足实际工程应用要求.
침대현유토압력전감기무법실현장기、실시감측적요구,설계료온도보상식광섬광책토압력전감기.선용유경중심적평막편작탄성원건,선용령민도고、체적소、질량경、역우파분복용화조성전감망락적광섬광책작민감원건;동시채용료불수력광책법진행료온도보상.경실험측시,해전감기적령민도위1.5 nm/MPa;선성도오차위0.35%;중복성위0.06%;지체위2.19%;정태오차위2.21%;저사지표능구만족실제공정응용요구.
Since the present soil pressure sensors cannot be used to realize long term and real time monitoring,a temperature compensation FBG sensor is designed.Flat diaphragm with hard core is selected as elastic element,and a compact FBG with high sensitivity,wave division multiplexing and sensor network features is adopted as sensing element.Grating free of stress is used to compensate temperature.According to experiments and tests,the sensor has sensitivity of 1.5 nm/MPa,linearity error of 0.35%,repetitiveness of 0.06%,delay of 2.19% and static error of 2.21%,which meet the requirements of engineering application.