基于正交光纤光栅阵列的负载感知系统研究

Research on load sensing system based on orthogonal fiber grating array

为了避免在装配中夹持力过大损坏产品或太小产生滑落的问题,采用了光纤传感智能感知的方法,设计了一种基于正交光纤光栅阵列的负载感知系统。感知模块采用光纤光栅两两相互垂直的方式排布,获取夹持平面两个正交方向的横向剪切力,从而分析夹持状态。实验中采用两个5.0cm×5.0cm的橡胶块制成负载感知模块,通过仿真定量分析了不同参量对夹持控制的影响程度,得到了光纤光栅的有效长度与敏感度成正比、与空间分辨率成反比的规律。结果表明,垂向灵敏度为31.4pm/N,水平灵敏度为29.9pm/N,该系统可实时获取被夹持物的受力变化。该结果对智能调节控制是有帮助的。

In order to avoid the problem that the clamping force is too large to damage the product during assembly or too small to cause slipping,a method of intelligent sensing of fiber sensing was adopted,and a load sensing system based on orthogonal fiber grating array was designed.To analyze the clamping state,the sensing modules were arranged in a way that the fiber gratings were perpendicular to each other to obtain the transverse shear force in two orthogonal directions of the clamping plane.Two 5.0cm×5.0cm rubber blocks were used to make the load sensing module in the experiment.The effect of different parameters on the clamping control was analysed,and the results show that the effective length of the fiber grating is proportional to the sensitivity and inversely proportional to the spatial resolution.The results show that the vertical sensitivity is 31.4pm/N,and the horizontal sensitivity is 29.9pm/N.It can be seen that the system can obtain the force changes of the clamped objects in real time,which is helpful for intelligent adjustment and control.