轮辐式温度自动补偿型光纤光栅测力传感器

Spoke-Type Fiber Grating Sensor of Measuring Force with Temperature Active Compensation

采用轮辐式传感机构设计,将两个不同波长的布拉格光栅与轮辐中性轴线同时成相同角度,粘贴在两个对称轮辐侧面的中间位置构成传感头.利用光纤光栅波长绝对编码的特性,设计并研制了轮辐式温度自动补偿型光纤光栅测力传感器.理论分析和实验结果证明,该传感器具有温度自动补偿特性,可用于压力和拉力的高精度感测,其最大力的测量值达到3 kN,温度自动补偿范围为-20℃～75℃.

Adopting the design of spoke-type sensing structure, the sensing head is composed of two Bragg gratings, which have different wavelengths and are bonded to the middle of two symmetrical spoke side surfaces with same angles along the direction of the spoke neutral axis. Using the characteristic of fiber grating absolute code, the spoke-type fiber grating sensor of measuring force with temperature active compensation is designed and manufactured. The theoretical analysis and experimental results indicate that this sensor has the function of temperature active compensation, it can be used in high precision sensing and measuring of pressure and pull, the maximal force measurement value is up 3 kN and the temperature active compensation range is between -20°C and 75°C.