基于磁致伸缩的大功率拖拉机阻力传感器设计  

Design of Draft Sensor in Big-power Tractor Raiser Based on Magnetostriction

作　　者：李明生[1] 迟瑞娟[1] 毛恩荣[1] 张婧瀛[1] 刘宇[1] 

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业机械学报》2013年第8期8-12,32,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：'十二五'国家科技支撑计划资助项目(2011BAD20B02)

摘　　要：基于磁致伸缩原理,设计了一种大功率拖拉机电-液提升器用销轴式阻力传感器。根据铁磁学理论、安培环路定理以及磁路欧姆定律建立了传感器励磁电路的数学模型,并在Matlab/Simulink中对传感器的电压信号输出随负载的变化情况进行了仿真分析。采用45调质钢和40Cr调质钢两种材料作为传感器外壳进行对比。传感器剪切力静态加载试验结果表明:45调质钢静态特性曲线线性度决定系数R2为0.996 5,加载70 kN剪切力时输出电压为0.55 V,性能优于40Cr调质钢。A kind of axial draft sensor was designed based on magnetostriction theory to improve the measuring accuracy of soil resistance.A mathematical model of sensor’s exciting circuit was established based on ferromagnetics theory,Ampere’s circulation and Ohm’s law for magnetic path.Then the performances of sensor’s output signal along with load were simulated by using Matlab / Simulink.45quenching steel and 40Cr-quenching steel were used as sensor ’s shell separately.Load experiment showed that the performance of the sensor,of which shell was 45-quenching steel,was better than the other.The better sensor’s linearity determination coefficient of static characteristic curves was 0.996 5.The output voltage was 0.55 V when the shearing force was 70 kN.

关 键 词：大功率拖拉机 阻力传感器 磁致伸缩 设计 仿真 

分 类 号：TH823[机械工程—仪器科学与技术] S237[机械工程—精密仪器及机械]