文档介绍：用电阻应变式力传感器制作的数显电子秤
摘要
电阻应变式传感器具有测量范围广、精度高、误差小和线性特性好等优点,且能在恶劣环境下工作,在力、压力和重量测试中有非常广泛的应用,力传感器具有结构简单、体积小、重量轻、使用寿命长等优异的特点。所以电阻应变式力传感器制作的数显电子秤具有准确度高易于制作,简单实用、成本低廉、体积小巧、携带方便等特点。
本文从数显电子秤的要求分析入手,将整个系统分成四个部分,分析和讨论了各个部分的电路原理、控制策略、实现方法。详细讨论了系统的各种工况及信号的传递情况,并得到了系统各个部分在不同工况的工作状态。数显电子秤根据弹性体(弹性元件,敏感梁)在外力作用下产生弹性变形,使粘贴在他表面的电阻应变片(转换元件)也随同产生变形,电阻应变片变形后,它的阻值将发生变化(增大或减小),再经相应的测量电路把这一电阻变化转换为电信号(电压或电流),将电信号通过数码显示器显示出来,从而完成了将外力变换为电信号的过程。
关键词
称重传感器;电阻应变计;弹性体
Abstract
The electric resistance contingency type spread feeling tool to have diagraph scope wide,accuracy Gao,the error margin be small with line characteristic good ,and ability under the bad environment work,in the dint,pressure and the weight test have very extensive of application,the dint spread feeling tool to have structure simple,the physical volume be small,weight light,service life long the electric resistance contingency type dint spread a feeling machine creation of number show electronics steelyard to have an accurate degree Gao be easy to creation,simple practical,the cost be cheap,the physical volume be cleverly made and take convenience .
This text from number show the request of electronics steelyard analysis mence,be divided into four part,analysis and discussion:the whole system each part of electric circuit principle,control strategy, realization discussion deliver of various work condition and signal circumstance of system,and got system part at dissimilarity work condition of work show electronics steelyard according to flexibility body(ponent,sensitive beam) at outside the dint function descend a creation flexibility transform,make to glue to stick at him surface of electric resistance contingency slice(ponent) also together with creation transform,electric resistance contingency after slice transform,it of resistivity will occurrence variety(enlarge or let up),again through correspond of measure electric ci