毕业设计说明书基于电阻应变片的称重传感器设计班级：学号：软件学院姓名：软件工程学院：黄志诚王春花专业：指导教师：2014年6月基于电阻应变片的称重传感器设计摘要随着技术的进步,由称重传感器制作的电子衡器已广泛地应用到各行各业,实现了对物料的快速、准确的称量，特别是随着微处理机的出现，工业生产过程自动化程度化的不断提高，称重传感器已成为过程控制中的一种必需的装置。目前，称重传感器几乎运用到了所有的称重领域。本文设计了一个电阻应变式的称重传感器。电阻应变式称重传感器是基于这样一个原理：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），从而完成了将外力变换为电信号的过程。本设计的称重传感器就是利用应变片阻值的变化量来确定弹性元件的微小应变，从而利用力，受力面积及应变之间的关系来确定力的大小，进而求得产生作用力的物体的质量。应变片阻值的变化可以通过后续的处理电路求得。关键词：称重传感器，弹性体，电阻应变片BasedonthedesignofresistancestraingaugeloadcellAbstractWiththeprogressoftechnology,electronicweighingapparatusmadebytheweighingsensoriswidelyusedinallwalksoflife,torealizetherapidandaccurateformaterialweighing,especiallywiththeemergenceofmicroprocessor,theconstantimprovementoftheindustrialproductionprocessautomation,weighingsensorhasbecomeanecessarydeviceintheprocesscontrol.Atpresent,applytoalmostallweighingweighingsensors.Inthispaper,thedesignofaresistancestraintypeweighingsensor.Resistancestraintypeweighingsensorisbasedontheprinciplethatelastomer(elasticelement,sensitivebeam)elasticdeformationundertheactionofexternalforce,theresistancestraingaugeonthesurfaceofthepasteinhis(cell)alsoalongwiththedeformationanddeformationresistancestraingauge,itsvaluewillchange(increase/decrease),andthenthroughthecorrespondingmeasurementcircuitconverttheresistancetoelectricalsignals(voltageorcurrent),soastocompletetheprocessofexternalforcetransformintoelectricalsignals.Thedesignoftheweighingsensoristhechangeofresistancestraingaugeisusedtodeterminethesmallstrainofelasticelement,soastouseforce,stressandstraintherelationshipbetweentheareatodeterminethesizeoftheforce,thentheforceofthemassofthebody.Thechangeoftheresistancestraingaugecanbeobtainedthroughthesubsequentprocessingcircuit.Keywords:Weighingsensors,elastomer,resistancestraingauge中北大学2014届毕业设计说明书第PAGE\*ROMAN\*MERGEFORMATII页共=2\*ROMAN\*MERGEFORMATII页目录TOC\o"1-3"\h\z\uHYPERLINK\l_Toc46