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热电偶的技术之温度控制

点击次数:   发布时间:2015-12-16 16:30:37

 热电偶是一种感温元件,是一次仪表。它直接测量温度,并把温度信号转换成热电动势信号,通过电气仪表(二次仪表)转换成被测介质的温度。热电偶测温的基本原理是两种不同成份的材质导体组成闭合回路,当两端存在温度梯度时,回路中就会有电流通过,此时两端之间就存在电动势——热电动势,这就是所谓的塞贝克效应。两种不同成份的均质导体为热电极,温度较高的一端为工作端,温度较低的一端为自由端,自由端通常处于某个恒定的温度下。根据热电动势与温度的函数关系,制成热电偶分度表;分度表是自由端温度在0℃时的条件下得到的,不同的热电偶具有不同的分度表。

黄大仙玄机资料独家   ZAIREDIANOUHUILUZHONGJIERUDISANZHONGJINSHUCAILIAOSHI,ZHIYAOGAICAILIAOLIANGGEJIEDIANDEWENDUXIANGTONG,REDIANOUSUOCHANSHENGDEREDIANSHIJIANGBAOCHIBUBIAN,JIBUSHOUDISANZHONGJINSHUJIERUHUILUZHONGDEYINGXIANG。YINCI,ZAIREDIANOUCEWENSHI,KEJIERUCELIANGYIBIAO,CEDEREDIANDONGSHIHOU,JIKEZHIDAOBEICEJIEZHIDEWENDU。

黄大仙玄机资料独家   REDIANOUWENDUCHUANGANQIDEGONGZUOYUANLI

黄大仙玄机资料独家   LIANGZHONGBUTONGCHENGFENDEDAOTI(CHENGWEIREDIANOUSICAIHUOREDIANJI)LIANGDUANJIEHECHENGHUILU,DANGJIEHEDIANDEWENDUBUTONGSHI,ZAIHUILUZHONGJIUHUICHANSHENGDIANDONGSHI,ZHEIZHONGXIANXIANGCHENGWEIREDIANXIAOYING,ERZHEIZHONGDIANDONGSHICHENGWEIREDIANSHI。REDIANOUJIUSHILIYONGZHEIZHONGYUANLIJINXINGWENDUCELIANGDE,QIZHONG,ZHIJIEYONGZUOCELIANGJIEZHIWENDUDEYIDUANJIAOZUOGONGZUODUAN(YECHENGWEICELIANGDUAN),LINGYIDUANJIAOZUOLENGDUAN(YECHENGWEIBUCHANGDUAN);LENGDUANYUXIANSHIYIBIAOHUOPEITAOYIBIAOLIANJIE,XIANSHIYIBIAOHUIZHICHUREDIANOUSUOCHANSHENGDEREDIANSHI。

  REDIANOUSHIJISHANGSHIYIZHONGNENGLIANGZHUANHUANQI,TAJIANGRENENGZHUANHUANWEIDIANNENG,YONGSUOCHANSHENGDEREDIANSHICELIANGWENDU,DUIYUREDIANOUDEREDIANSHI,YINGZHUYIRUXIAJIGEWENTI: 1、REDIANOUDEREDIANSHISHIREDIANOUGONGZUODUANDELIANGDUANWENDUHANSHUDECHA,ERBUSHIREDIANOULENGDUANYUGONGZUODUAN,LIANGDUANWENDUCHADEHANSHU;

黄大仙玄机资料独家   2、REDIANOUSUOCHANSHENGDEREDIANSHIDEDAXIAO,DANGREDIANOUDECAILIAOSHIJUNYUNSHI,YUREDIANOUDEZHANGDUHEZHIJINGWUGUAN,ZHIYUREDIANOUCAILIAODECHENGFENHELIANGDUANDEWENCHAYOUGUAN;

黄大仙玄机资料独家   3、DANGREDIANOUDELIANGGEREDIANOUSICAILIAOCHENGFENQUEDINGHOU,REDIANOUREDIANSHIDEDAXIAO,ZHIYUREDIANOUDEWENDUCHAYOUGUAN;RUOREDIANOULENGDUANDEWENDUBAOCHIYIDING,ZHEIJINREDIANOUDEREDIANSHIJINSHIGONGZUODUANWENDUDEDANZHIHANSHU。

  REDIANOUCELIANGJINGDUHEWENDUCELIANGFANWEIDEXUANZE

  LIANGZHONGBUTONGCAILIAODEDAOTIHUOBANDAOTIAHEBHANJIEQILAI,GOUCHENGYIGEBIHEHUILU,RUTUSUOSHI。DANGDAOTIAHEBDELIANGGEZHIZHEDIAN1HE2ZHIJIANCUNZAIWENCHASHI,LIANGZHEZHIJIANBIANCHANSHENGDIANDONGSHI,YINERZAIHUILUZHONGXINGCHENGYIGEDAXIAODEDIANLIU,ZHEIZHONGXIANXIANGCHENGWEIREDIANXIAOYING。REDIANOUJIUSHILIYONGZHEIYIXIAOYINGLAIGONGZUODE。

  XUANZEREDIANOUYAOGENJUSHIYONGWENDUFANWEI、SUOXUJINGDU、SHIYONGQIFEN、CEDINGDUIXIANGDEXINGNENG、XIANGYINGSHIJIANHEJINGJIXIAOYIDENGZONGHEKAOLV。

  1、测量精度和温度测量范围的选择使用温度在1300~1800℃,要求精度又比较高时,一般选用B型热电偶;要求精度不高,气氛又允许可用钨铼热电偶,高于1800℃一般选用钨铼热电偶;使用温度在1000~1300℃要求精度又比较高可用S型热电偶和N型热电偶;在1000℃以下一般用K型热电偶黄大仙玄机资料独家和N型热电偶,低于400℃一般用E型热电偶;250℃下以及负温测量一般用T型电偶,在低温时T型热电偶稳定而且精度高。

  2、SHIYONGQIFENDEXUANZESXING、BXING、KXINGREDIANOUSHIHEYUQIANGDEYANGHUAHERUODEHAIYUANQIFENZHONGSHIYONG,JXINGHETXINGREDIANOUSHIHEYURUOYANGHUAHEHAIYUANQIFEN,RUOSHIYONGQIMIXINGBIJIAOHAODEBAOHUGUAN,DUIQIFENDEYAOQIUJIUBUTAIYANGE。

  3、NAIJIUXINGJIREXIANGYINGXINGDEXUANZEXIANJINGDADEREDIANOUNAIJIUXINGHAO,DANXIANGYINGJIAOMANYIXIE,DUIYURERONGLIANGDADEREDIANOU,XIANGYINGJIUMAN,CELIANGTIDUDADEWENDUSHI,ZAIWENDUKONGZHIDEQINGKUANGXIA,KONGWENJIUCHA。YAOQIUXIANGYINGSHIJIANKUAIYOUYAOQIUYOUYIDINGDENAIJIUXING,XUANZEKAIZHUANGOUBIJIAOHESHI。

黄大仙玄机资料独家   4、CELIANGDUIXIANGDEXINGZHIHEZHUANGTAIDUIREDIANOUDEXUANZE

黄大仙玄机资料独家   YUNDONGWUTI、ZHENDONGWUTI、GAOYARONGQIDECEWENYAOQIUJIXIEQIANGDUGAO,YOUHUAXUEWURANDEQIFENYAOQIUYOUBAOHUGUAN,YOUDIANQIGANRAODEQINGKUANGXIAYAOQIUJUEYUANBIJIAOGAO。

  5、ZHUYISHIXIANG

  ◆REDIANOU[1]GONGCHENGYALI:YIBANSHIZHIZAIGONGZUOWENDUXIABAOHUGUANSUONENGCHENGSHOUDEJINGTAIWAIYAERPOLIE。

黄大仙玄机资料独家   ◆REDIANOUZUIXIAOCHARUSHENDU:YINGBUXIAOYUQIBAOHUTAOGUANWAIJINGDE8-10BEI(TELIECHANPINLIWAI)

  ◆JUEYUANDIANZU:DANGZHOUWEIKONGQIWENDUWEI15-35℃,XIANGDUISHIDU<80%SHIJUEYUANDIANZU≥5ZHAOOU(DIANYA100V)。JUYOUFANGJIANSHIJIEXIANHEDEREDIANOU,DANGXIANGDUIWENDUWEI93±3℃SHI,JUEYUANDIANZU≥0.5ZHAOOU(DIANYA100V)

黄大仙玄机资料独家   ◆GAOWENXIADEJUEYUANDIANZU:REDIANOUZAIGAOWENXIA,QIREDIANJI(BAOKUOSHUANGZHISHI)YUBAOHUGUANYIJISHUANGZHIREDIANJIZHIJIANDEJUEYUANDIANZU(ANMEIMIJI)YINGDAYUXIABIAOGUIDINGDEZHI。

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