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基于光纤光栅传感基本原理,实现了冲击载荷下液压机拉杆等大型机械设备动态压力的直接测量,并依据液压机拉杆有限元分析将光纤光栅准确定位于线性梯度应变区,设计并实验验证了高精度的动态压力测量系统,用等悬臂梁模拟液压机拉杆并结合LAN-XI振动系统,验证用于液压机拉杆FBG压力传感器的动态特性性能。结果表明,传感系统在低频和高频下均具有良好的动态振动特性,能满足液压机拉杆应力检测的要求,并且可以广泛地应用于大型起重臂、翻车机溜槽和立式辊磨机等大型机械设备的动态性能试验及动态响应测试中。
Based on the basic principle of FBG sensing, the dynamic pressure measurement of large mechanical equipment such as the hydraulic rod under impact load was realized. Based on the finite element analysis of the rod of hydraulic press, the FBG was accurately positioned in the linear gradient strain zone. Of the dynamic pressure measurement system, with a cantilever beam simulator hydraulic rod and LAN-XI vibration system to verify the dynamic characteristics of the hydraulic rod FBG pressure sensor performance. The results show that the sensing system has good dynamic vibration characteristics under low frequency and high frequency, which can meet the requirements of hydraulic rod tension detection and can be widely used in large boom, dumper chute and vertical roller mill Dynamic performance test and dynamic response test of large machinery and equipment.