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</tr> </table></td> </tr> <tr> <td height="18"> </td> </tr> <tr> <td><table width="733" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="30" height="36"><img src="https://kjt-china.oss-cn-hangzhou.aliyuncs.com/static/picture/title_bg1.gif" width="30" height="36"></td> <td width="673" align="center" background="https://kjt-china.oss-cn-hangzhou.aliyuncs.com/static/image/title_bg_center.jpg" style="color:#000000; font-size:14px; font-weight:bold"> 霍爾傳感器在溫度誤差及其補償?shù)奶匦?/td> <td width="30"><img src="https://kjt-china.oss-cn-hangzhou.aliyuncs.com/static/picture/title_bg2.gif" width="30" height="36"></td> </tr> <tr> <td><img src="https://kjt-china.oss-cn-hangzhou.aliyuncs.com/static/picture/title_bg3.gif" width="30" height="14"></td> <td background="images/title_bg_center2.jpg"> </td> <td><img src="https://kjt-china.oss-cn-hangzhou.aliyuncs.com/static/picture/title_bg4.gif" width="30" height="14"></td> </tr> </table></td> </tr> <tr> <td align="center" style="color:#999999"><strong>錄入時間：</strong>2015-01-20 09:43:49<strong>瀏覽次數(shù)：</strong>1</td> </tr> <tr> <td height="20"> </td> </tr> <tr> <td style="line-height:25px; font-size:12px; padding-left: 8px; padding-right: 8px"> <p>溫度誤差產(chǎn)生的原因有以下兩種：</p><p>　　1、霍爾元件的材料是半導(dǎo)體，半導(dǎo)體對溫度的變化非常敏感。半導(dǎo)體的載流子的濃度、遷移率、電阻率等參數(shù)都是溫度的函數(shù)，因此容易受到溫度的影響。</p><p>　　2、當(dāng)溫度發(fā)生變化時，霍爾元件的特性參數(shù)(如霍爾電動勢、輸入電阻和輸出電阻等)都會發(fā)生變化，從而導(dǎo)致霍爾傳感器產(chǎn)生溫度誤差。</p><p>　　減小霍爾元件的溫度誤差的方法有：</p><p>　　1、恒溫措施補償，包括以下兩種：</p><p>　　A：將霍爾元件放在恒溫器中;</p><p>　　B：將霍爾元件放在恒溫的空調(diào)房中。</p><p>　　2、恒流源溫度補償：</p><p>　　針對于光電開關(guān)與霍爾什么器差異還是比較大的，就像是霍爾元件的靈敏度與溫度的關(guān)系為：KH=KHO(1+AT)</p><p>　　霍爾元件的霍爾電壓的溫度系數(shù)一般都是正值，其霍爾電壓會隨著溫度的升高而增加。在霍爾元件的旁邊并聯(lián)一個電阻，使激勵電流I相應(yīng)減小，霍爾元件本身的溫度就不會過高，使EH=KHIB的結(jié)果保持不變，從而達(dá)到了補償?shù)哪康摹?/p> </td> </tr> <tr> <td height="20"><div id="u4yq6wqs0" class="sx"> <p> 上一篇:<a href="http:///gcalinfo/1322.html">霍爾傳感器的基本誤差及補償?shù)脑敿?xì)技術(shù)介紹</a></p> <p>下一篇:<a 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