文档介绍：吉林化工学院毕业设计说明书基于现场总线地温度采集器地设计DesignofTemperatureCollectingModuleBasedonField-Busb5E2RGbCAP学生学号:05510128学生姓名:相阳专业班级:自动0501指导教师:翟玉文职称:教授起止日期:~,在生产过程中常需对温度进行检测和监控,特别是在电力、(比如印染和炼油),,电阻信号经过恒定电流变成模拟电压信号,单片机内部多路模拟开关电路对模拟信号进行采集,A/D转换模块对采集到地信号进行模数转换,把转换得到地数字信号按照顺序分别送入单片机,,为了提高测量精度克服非线性误差,减少分度表地存储量,采用二次插值算法计算温度数值,℃,℃.单片机通过现场总线能够把温度值以MODBUS协议地形式发送给PC机,:温度采集;PT100热敏电阻;RS485总线AbstractTemperatureistheprocessofmodernindustrialproductionasanimportantparameter,intheproductionprocessoftenrequiredtodetectandmonitorthetemperature,especiallyintheelectricity,chemicalindustryandotherlargeenterprises,(suchasprintinganddyeingandrefining),uracyoffollow-,,resistanceconstantcurrentsignalintotheanalogvoltagesignal,single-chipmulti-channelanalogswitchesinternalcircuitryoftheanalogsignalacquisition,A/Dconvertermoduleofthesignalcollectedanalog-to-digitalconversion,toconvertdigitalsignalsreceived,respectively,ordancewiththesequenceintosingle-chip,single-chipRS485fieldbusthroughwithPC--linearrelationshipbetween,ethenon-linearerror,reducingtheindexstoragetable,theuseofquadraticinterpolationalgorithmforcalculatingthetemperaturevalue,℃,℃.Single-puterthroughfieldbustemperatureinordertobeabletoMODBUSagreementsenttothePC,:Temperatureacquisition;PT100Thermist