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margin:0px; padding:0px auto; width:98%;min-height:565px; margin-left:8px;"> <h1 class="title" style="margin-top:10px; margin-left:10px; text-align:center; line-height:35px;">霍爾傳感器磁性開關(guān)</h1> <div id="dztbprhhvx93" class='search2' style='text-align:center; border-top:dotted 1px #999; margin-top:10px; padding-top:10px;'><strong>發(fā)布時(shí)間: </strong>2019-01-30　瀏覽次數(shù): ?<script src="http:///plus/count.php?view=yes&aid=1051&mid=1"type='text/javascript' language="javascript"></script></div> <div id="dztbprhhvx93" class="newp" style=" width:98%; padding:8px;"> <img alt="霍爾接近開關(guān)傳感器2" src="/uploads/allimg/190129/1-1Z129143952323.jpg" style="width: 500px; height: 333px;" /><br /> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0);"><strong><span style="font-family: arial, helvetica, sans-serif; font-size: 14px;">霍爾接近開關(guān)傳感器工作原理：</span></strong></span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">電感式接近開關(guān)是一種利用渦流感知物體的傳感器，它由高頻振蕩電路、放大電路、整形電路及輸出電路組成。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">振蕩器是由繞在磁芯上的線圈而構(gòu)成的LC振蕩電路。振蕩器通過傳感器的感應(yīng)面，在其前方產(chǎn)生一個(gè)高頻交變的電磁場(chǎng)，當(dāng)外界的金屬物體接近這一磁場(chǎng)，并達(dá)到感應(yīng)區(qū)時(shí)，在金屬物體內(nèi)產(chǎn)生渦流效應(yīng)，從而導(dǎo)致LC振蕩電路振蕩減弱或停止振蕩，這一振蕩變化，被后置電路放大處理并轉(zhuǎn)換為一個(gè)具有確定開關(guān)輸出信號(hào)，從而達(dá)到非接觸式檢測(cè)目標(biāo)之目的。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0);"><strong><span style="font-family: arial, helvetica, sans-serif; font-size: 14px;">霍爾接近開關(guān)傳感器性能參數(shù)：</span></strong></span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">?1、工作電壓：是指電感式接近開關(guān)傳感器的供電電壓范圍，在此范圍內(nèi)可以保證傳感器的電氣性能及安全工作。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">2、工作電流：是指電感式接近開關(guān)傳感器連續(xù)工作時(shí)的最大負(fù)載電流。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">3、電壓降：是指在額定電流下開關(guān)導(dǎo)通時(shí)，在開關(guān)兩端或輸出端所測(cè)量到的電壓，</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">4、空載電流：是指在沒有負(fù)載時(shí)，測(cè)量所得的傳感器自身所消耗的電流。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">5、剩余電流：是指開關(guān)斷開時(shí)，流過負(fù)載的電流。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">6、極性保護(hù)：防止電源極性誤接的保護(hù)功能。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">7、短路保護(hù)：超過極限電流時(shí)，輸出會(huì)周期性地封閉或釋放，直至短路被清除。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0);"><strong><span style="font-family: arial, helvetica, sans-serif; font-size: 14px;">霍爾接近開關(guān)傳感器感應(yīng)距離與傳感器的選擇：</span></strong></span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">感應(yīng)距離是接近開關(guān)一個(gè)最重要的參數(shù)，它主要取決于傳感器的尺寸大?。ň€圈或者電容器），其他影響因素是目標(biāo)物的外形尺寸、材質(zhì)以及環(huán)境溫度等。對(duì)于磁式接近傳感器來說，相應(yīng)磁塊的排列分布和磁場(chǎng)的強(qiáng)度也是決定感應(yīng)距離的一個(gè)關(guān)鍵因素。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">接近開關(guān)的類型選擇</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">非齊平接近開關(guān)</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">非齊平接近開關(guān)具有最大的感應(yīng)距離（與直徑有關(guān)）。正如先前所提到的，對(duì)于電感式接近開關(guān)，線圈是產(chǎn)生電磁場(chǎng)的，為使產(chǎn)生的磁場(chǎng)向著一個(gè)方向，線圈被安裝在一個(gè)鐵芯內(nèi)。然而還是有一部分磁場(chǎng)會(huì)徑向散射，這種徑向能檢測(cè)到目標(biāo)物的效果同樣在電容式接近開關(guān)中具有。為防止開關(guān)周圍環(huán)境對(duì)開關(guān)的影響，開關(guān)感應(yīng)面周圍必須留出一定的空間。這個(gè)空間距離必須符合最小要求，下表列出了符合要求的最小間隙值。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">齊平式接近開關(guān)</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">齊平式電感接近開關(guān)和電容接近開關(guān)可以齊平安裝而無需留出一段空隙 (A=0)。這種安裝方式相比非齊平的優(yōu)勢(shì)在于有更好的機(jī)械保護(hù)功能，安裝時(shí)也不會(huì)出現(xiàn)傾斜。由于內(nèi)部特殊的屏蔽作用，使側(cè)面徑向的磁場(chǎng)減小，這些接近開關(guān)的感應(yīng)距離大約是非齊平安裝接近開關(guān)的60%左右。</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">相互干擾</span></p> <p style="text-indent: 2em; line-height: 3em;"> <span style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 14px;">為防止接近開關(guān)間相互干擾，幾個(gè)傳感器相鄰安裝時(shí)必須保持上表所列的最小距離F。如果這個(gè)距離會(huì)導(dǎo)致相關(guān)應(yīng)用問題，根據(jù)需要我們可以提供不同頻率的接近開關(guān)，他們可以相鄰安裝。<br /> <img _src="http:///uploads/allimg/190129/1-1Z12913212G92.png" alt="霍爾接近開關(guān)傳感器安裝" src="/uploads/allimg/190129/1-1Z12913212G92.png" style="width: 500px; height: 239px;" /><br /> <img _src="http:///uploads/allimg/190129/1-1Z129132214203.png" alt="霍爾接近開關(guān)傳感器選型" src="/uploads/allimg/190129/1-1Z12915031I08.png" style="width: 800px; height: 1029px;" /></span></p> </div> <div 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