组合秤称重传感器大变形致非线性误差分析  

Analysis of Nonlinear Error Caused by Large Deformation of Load Sensor for Combination Weigher

作　　者：朱鹏飞[1] 黄松和[1] 梅菊[1] 

机构地区：[1]西南交通大学,成都610031

出　　处：《包装工程》2015年第23期103-106,115,共5页Packaging Engineering

基　　金：四川省科技支撑计划项目(2014GZ0024)

摘　　要：目的称重传感器受弹性体本身结构特性的影响,其输入输出成非线性关系,从而影响了称重传感器的精度,就称重传感器弹性体大变形致非线性误差展开分析。方法利用有限元方法对弹性体大变形致非线性误差进行了量化分析,得出了在0-3 kg量程内的弹性体大变形致非线性相对误差,并进行了相应的补偿。结论随着称重物料质量的不断增加,其大变形致非线性误差相应增加,量程内相对误差最高达0.05%,利用该型传感器补偿函数可消除此非线性误差,进一步提高平行梁式称重传感器精度。There is nonlinear relation between the weighing sensor′s output and input, which is caused by the structure characteristics of the elastomer, thus affecting the accuracy of the weighing sensor. This paper launched the analysis of the nonlinear error caused by the large deformation of elastomer. By using the finite element analysis method, this paper obtained the relative error caused by the large deformation of elastomer in the 0-3 kg range through quantitative analysis,and the corresponding compensation was made. The result showed that with the increase of weighing quality, the nonlinear error caused by the large deformation increased correspondingly, and the maximum value in the measuring range reached0.05%. Using the nonlinear error compensation function, this paper eliminated this nonlinear error, and further improved the accuracy of the parallel girder load sensor.

关 键 词：平行梁式称重传感器 大变形致非线性误差 有限元方法 

分 类 号：TB486[一般工业技术—包装工程]