高拉扭比的复合式传感器研究  

Research of Load Cell with Low-Torque/High-Tensile Traction

作　　者：唐亮[1] 杨昌棋[1] 龙血松[1] 彭向和[1] 

机构地区：[1]重庆大学资源及环境科学学院工程力学系,重庆400030

出　　处：《传感技术学报》2011年第4期508-512,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(10976032)

摘　　要：针对薄壁微管拉扭试验中载荷测试的特殊需求,研制了一种基于薄梁拉—弯变形的具有对称一体化结构的高拉扭载荷比复合式传感器。采用有限元法分析了传感器弹性体在拉力、扭矩以及拉扭复合载荷下的应力和应变分布,优化了弹性体尺寸参数、应变片的粘贴位置和检测电路。实验表明,传感器具有结构合理,灵敏度高,刚度大,拉扭耦合小,加工工艺简单,重复性好的特点,实现了高拉扭比试验的高精度载荷测量。A load cell with large ratio of tensile traction to torque is developed for biaxial tension-torsion test of thin-walled microtubes,which is based on the separation of tensile / bending deformation of 4 symmetrically distributed thin strips,on each of which there is a hole in the middle.The distributions of stress and strain under pure tension,pure torsion and combined tension-torsion are analyzed with FEM（Finite Element Method）approach.The geometry and the size of each part of the load cell,and the location of strain gages are optimized.Biaxial tension-torsion tests of NiTi shape memory alloy microtubes showed that the load cell is of satisfactory sensitivity and stiffness,low-coupling between torsion and tensile deformation,and can be used in high-precision measurement of load under combined tension-torsion testing.

关 键 词：载荷传感器 拉扭试验 有限元分析 薄壁微管 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]