基于数值理论与拓扑优化下电阻式应变传感器灵敏度的研究  

Research on Sensitivity of Resistive Strain Sensors Basedon Numerical Theory and Topology Optimization

作　　者：胡斌 廖玉松[1] 谭邦俊 HU Bin;LIAO Yu-song;TAN Bang-jun(School of Automotive Engineering,Chuzhou Polytechnic,Chuzhou 239000,China)

机构地区：[1]滁州职业技术学院汽车工程系,安徽滁州239000

出　　处：《西安航空学院学报》2021年第1期41-46,共6页Journal of Xi’an Aeronautical Institute

基　　金：滁州职业技术学院科研规划一般项目(YJY-2019-13)。

摘　　要：对于电阻式应变传感器,灵敏度是衡量传感器测量精度的重要指标之一。对现有电阻式应变传感器结构进行优化使其灵敏度提高,从而可提高电阻式应变传感器测量精度。首先利用WorkBench有限元软件和数值理论,计算电阻式应变传感器的灵敏度理论值,接下来基于拓扑软件以质量降低50%和最大应力不超过材料许用应力为约束条件进行拓扑优化。最后对拓扑优化后电阻式应变传感器结构进行灵敏度理论计算。研究结果表明,拓扑优化后电阻式应变传感器的灵敏度为2.57 mV/V,原有的结构灵敏度为2.25 mV/V,拓扑优化后的灵敏度比原有有利提高了14.2%。For the resistance strain sensor,sensitivity is one of the important indexes to measure the precision of the sensor.The sensitivity of the resistance strain sensor is improved by optimizing the structure of the resistance strain sensor,and the measuring precision of the resistance strain sensor is improved.Method:Firstly,the theoretical sensitivity of the resistance strain sensor was calculated by using the finite element software workbench and numerical analysis,secondly,the topology software is used to optimize the structure of the strain sensor with the constraints of reducing the mass by 50%and the maximum stress not exceeding the allowable stress.The results show that the sensitivity of the strain sensor is 2.57 mV/V,and the sensitivity of the original structure is 2.25 mV/V,which is 14.2%higher than that of the original structure.

关 键 词：灵敏度 拓扑优化 电阻式应变传感器 全桥差动电路 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程] V224