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分析如何将热电偶产生的电压转换为精确的温度读数

来源:发表时间:2018-11-07

上海11选5    YOUYUDUOZHONGYUANYIN,JIANGREDIANOUCHANSHENGDEDIANYAZHUANHUANWEIJINGQUEDEWENDUDUSHUBINGBURONGYI:DIANYAXINHAOHENXIAO,WENDU - DIANYAGUANXISHIFEIXIANXINGDE,XUYAOCANKAOJIEBUCHANG,REDIANOUKENENGHUIYINQIJIEDIWENTI。RANGWOMENZHUYIKAOLVZHEIXIEWENTI。


    电压信号很小:最常见的上海自动化仪表三厂上海11选5热电偶类型是J,K和T.在室温下,它们的电压分别在52μV/°C,41μV/°C和41μV/°C时变化。其他不太常见的类型随温度变化甚至更小。这种小信号在模数转换之前需要高增益级。表1比较了各种热电偶类型的灵敏度。


    GEZHONGREDIANOULEIXINGZAI25°CSHIDEDIANYABIANHUAYUWENSHENG(SAIBEIKEXISHU)DEGUANXI。



    YOUYUDIANYAXINHAOHENXIAO,XINHAODIAOLIDIANLUTONGCHANGXUYAODAYUE100ZUOYOUDEZENGYI - XIANGDANGJIANDANDEXINHAODIAOJIE。GENGNANDESHIJIANGSHIJIXINHAOYUREDIANOUYINXIANSHANGSHIQUDEZAOSHENGQUFENKAILAI。REDIANOUYINXIANHENZHANGBINGQIEJINGCHANGZAIDIANZAOSHENGHUANJINGZHONGYUNXING。YINXIANSHANGSHIQUDEZAOSHENGHENRONGYICHAOGUOWEIXIAODEREDIANOUXINHAO。


    TONGCHANGZUHELIANGZHONGFANGFALAICONGZAOSHENGZHONGTIQUXINHAO。DIYIZHONGSHISHIYONGCHAFENSHURUFANGDAQI,LIRUYIBIAOFANGDAQI,LAIFANGDAXINHAO。YOUYUDABUFENZAOSHENGDOUCHUXIANZAILIANGGENDAOXIANSHANG(GONGMO),YINCICHAFENCELIANGHUIXIAOCHUZAOSHENG。DIERZHONGSHIDITONGLVBO,TAKEYIXIAOCHUDAIWAIZAOSHENG。DITONGLVBOQIYINGXIAOCHUKENENGDAOZHIFANGDAQIZHENGLIUHE50 Hz / 60 Hz(DIANYUAN)WENGWENGSHENGDESHEPINGANRAO(1 MHzYISHANG)。ZAIFANGDAQIZHIQIANFANGZHISHEPINGANRAOLVBOQI(HUOSHIYONGDAILVBOSHURUDEFANGDAQI)FEICHANGZHONGYAO。50 Hz / 60 HzLVBOQIDEWEIZHITONGCHANGBINGBUZHONGYAO - TAKEYIYURFILVBOQIZUHE,FANGZHIZAIFANGDAQIHEADCZHIJIAN,ZUOWEIsigma-delta ADCDEYIBUFEN,HUOZHEKEYIYONGRUANJIANBIANCHENGZUOWEIPINGJUNLVBOQI。


上海11选5    CANKAOJIEBUCHANG:BIXUZHIDAOSHANGHAIZIDONGHUAYIBIAOSANCHANGREDIANOUCANKAOJIEDEWENDUCAINENGHUODEZHUNQUEDEJUEDUIWENDUDUSHU。DANGSHOUCISHIYONGREDIANOUSHI,ZHEISHITONGGUOJIANGCANBIJIETOUBAOCHIZAIBINGYUZHONGLAIWANCHENGDE。TU2MIAOHUILEYIGEREDIANOUDIANLU,QIYIDUANCHUYUWEIZHIWENDU,LINGYIDUANCHUYUBINGYU(0°C)。GAIFANGFAYONGYUXIANGJINDIBIAOZHENGGEZHONGREDIANOULEIXING,YINCIJIHUSUOYOUREDIANOUBIAODOUSHIYONG0°CZUOWEICANKAOWENDU。


TU:JIBENDETIE - KANGTONGREDIANOUDIANLU。


上海11选5    DANSHI,DUIYUDADUOSHUCELIANGXITONGERYAN,JIANGSHANGHAIZIDONGHUAYIBIAOSANCHANGREDIANOUDECANKAOJIEDIANBAOCHIZAIBINGYUZHONGSHIBUSHIJIDE。XIANGFAN,DADUOSHUXITONGSHIYONGCHENGWEICANKAOJIEBUCHANGDEJISHU(YECHENGWEILENGDUANBUCHANG)。CANKAOJIEWENDUSHIYONGLINGYIGEWENDUMINGANQIJIANCELIANG - TONGCHANGSHIIC,REMINDIANZU,ERJIGUANHUORTD(DIANZUWENDUJIANCEQI)。RANHOUBUCHANGREDIANOUDIANYADUSHUYIFANYINGCANKAOJIEWENDU。ZHONGYAODESHIJINKENENGZHUNQUEDIDUQUCANKAOJIETOU - JINGQUEDEWENDUCHUANGANQIBAOCHIYUCANKAOJIEDIANXIANGTONGDEWENDU。DUQUCANKAOJIEWENDUSHIDERENHECUOWUDOUJIANGZHIJIEXIANSHIZAIZUIZHONGDEREDIANOUDUSHUZHONG。



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