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1、.本文由416863836贡献doc文档可能在WAP端浏览体验不佳。建议您优先选择TXT，或下载源文件到本机查看。摘要在众多的先进技术行业中随着中国经济的飞速发展，科技的进步，中国加入WTO后，全球化浪潮不断兴起。随着科技的进步,对电子秤的要求也越来越高。常规的测试仪器仪表和控制装置被更先进的智能仪器所取代，使得传统的电子测量仪器在远离、功能、精度及自动化水平定方面发生了巨大变化，并相应的出现了各种各样的智能仪器控制系统，使得科学实验和应用工程的自动化程度得以显著提高。做为重量测量仪器，智能电子秤在各行各业开始显现其测量准确，测量速度快
2、，易于实时测量和监控的巨大优点，并开始逐渐取代传统型的机械杠杆测量称，成为测量领域的主流产品。本文设计的电子秤以半桥传感器为主,测量0～500g电子秤，随时可改变上限阈值，并达到阈值报警的功能。称重传感器输出的电量是模拟量，数值比较小达不到A/D转换接收的电压围。所以送A/D转换之前要对其进行前端放大、整形滤波等处理。然后，A/D转换的结果才能送单片机进行数据处理并显示。其数据显示部分采用LED显示，成本低且能很好地实现所要求的功能。关健字：单片机；电子秤；LED；传感器1AbstractAbstractAmongtheadvanced
3、technologyindustrywiththerapiddevelopmentofChina'seconomic,scientificandtechnologicalprogress,China'saccessiontotheWTO,continuingtheriseofglobalization.Withadvancesintechnology,therequirementsofelectronicscaleshavebecomemoresophisticated.Conventional.testinstrumentationa
4、ndcontroldevicesweremoreadvancedintelligentinstrumentsreplacedthetraditionalelectronicmeasuringinstrumentsawayfrom,function,accuracyandautomationlevelofthetremendouschangeshavetakenplace,andthecorrespondingemergenceofawiderangeofintelligentinstrumentcontrolsystem,makesth
5、eapplicationofscientificexperimentsandthedegreeofautomationprojectscanbesignificantlyenhanced.Weightasameasuringinstrument,intelligentelectronicscalesbegintobefeltinallwalksoflifemeasurementaccuracy,measurementspeed,easeofreal-timemeasurementandmonitoringofthegreatadvant
6、ages,andbegantograduallyreplacethetraditionalmechanicallever-typemeasurementthathasbecomemainstreamproductsinthefieldofmeasurement.Inthispaper,thedesignoftheelectronicscaletohalf-bridge-basedsensors,measurement0~500gelectronicscale,atanytimecanchangetheupperlimitthreshol
7、d,andtoachievethefunctionsofalarmthresholds.Weighingsensoroutputistheanalogpowerconsumption,relativelysmallvalueoflessthanA/Dconvertertoreceivethevoltagerange.SotosendA/Dconverterfront-endpriortoitsamplification,filtering,processingofplastic.Then,A/Dconversionresultstobe
8、senttosingle-chipmicrocomputerfordataprocessinganddisplay.ThedatashowthatpartoftheuseofLEDdisplay,agood
