【摘要】 提出了一种基于弹性薄壁圆筒的耐高压光纤光栅(FBG)压力传感器,推导了该传感器的波长与压力间的关系,得到了其压力响应灵敏度的解析式。分别对其用不锈钢和一种金属合金进行封装,并进行了对比实验研究,获得温度响应灵敏度分别为0.027nm/℃和0.013nm/℃,压力响应灵敏度分别为0.004nm/MPa和0.013nm/MPa。本传感器的压力响应具有很好的线性,压力测量范围可达40MPa以上,可应用于高压下物理量的传感测量。更多还原

【Abstract】 A fiber Bragg grating(FBG)high pressure sensor based on thin-wall elastic cylinder is designed.The relationship between the pressure and the central wavelength of FBG is derived.The encapsulation experiments between stainless steel and metal alloy are studied.The temperature sensitivity of the sensor is 0.027 nm/℃ and 0.013 nm/℃,respectively,and the pressure sensitivity is 0.004 nm/MPa and 0.013 nm/MPa,respectively.The linearity of the sensor is good.And the whole measuring range can reach 40 MPa at least.This kind of sensor has potential applications in the sensing measurement at high-pressure.更多还原