圖爾(er)克(ke)電(dian)容式(shi)(shi)接近(jin)(jin)開(kai)關可(ke)完(wan)成非(fei)觸摸的，獨(du)立的檢查(cha)。而(er)且對于導電(dian)資料和非(fei)導電(dian)資料均可(ke)完(wan)成牢(lao)靠檢查(cha)。因而(er)，電(dian)容式(shi)(shi)接近(jin)(jin)開(kai)關能夠(gou)適用于某(mou)些電(dian)感式(shi)(shi)傳感器無法檢查(cha)的運(yun)用場合。turck電(dian)容式(shi)(shi)接近(jin)(jin)開(kai)關典型的運(yun)用是間隔和方位(wei)的丈量，以及曲折強度，厚(hou)度，液位(wei)操控，偏疼度，同心度，形(xing)變，磨(mo)損和轟(hong)動的檢查(cha)。

結構和功用

每個圖爾克(ke)電(dian)(dian)(dian)容(rong)(rong)式接近開(kai)關的(de)(de)感(gan)應元件是由(you)一(yi)個傳感(gan)器電(dian)(dian)(dian)極(ji)和一(yi)個屏蔽層電(dian)(dian)(dian)極(ji)構(gou)(gou)(gou)成的(de)(de)。這(zhe)兩個同軸金(jin)(jin)屬電(dian)(dian)(dian)極(ji)共同構(gou)(gou)(gou)成一(yi)個電(dian)(dian)(dian)容(rong)(rong)器。當被測(ce)物(wu)(wu)體（金(jin)(jin)屬原(yuan)(yuan)料或(huo)非金(jin)(jin)屬原(yuan)(yuan)料）挨近傳感(gan)器外表時(shi)，它一(yi)起進入(ru)了由(you)這(zhe)兩個電(dian)(dian)(dian)極(ji)構(gou)(gou)(gou)成的(de)(de)電(dian)(dian)(dian)場，從而使這(zhe)個電(dian)(dian)(dian)容(rong)(rong)器的(de)(de)電(dian)(dian)(dian)容(rong)(rong)量(liang)(liang)(liang)發(fa)(fa)生改變(bian)--這(zhe)就是說，具有(you)RC振蕩器電(dian)(dian)(dian)路(lu)的(de)(de)電(dian)(dian)(dian)容(rong)(rong)器，其電(dian)(dian)(dian)容(rong)(rong)量(liang)(liang)(liang)會跟著被測(ce)物(wu)(wu)體的(de)(de)挨近而添(tian)加（電(dian)(dian)(dian)容(rong)(rong)量(liang)(liang)(liang)的(de)(de)改變(bian)量(liang)(liang)(liang)為ΔC）。只要(yao)在到達ΔC的(de)(de)電(dian)(dian)(dian)容(rong)(rong)改變(bian)量(liang)(liang)(liang)的(de)(de)時(shi)分，RC振蕩器電(dian)(dian)(dian)路(lu)才干開(kai)始(shi)振蕩，發(fa)(fa)生振幅。這(zhe)么(me)，一(yi)旦被測(ce)物(wu)(wu)體接近，RC振蕩器電(dian)(dian)(dian)路(lu)發(fa)(fa)生的(de)(de)振幅會由(you)對比器電(dian)(dian)(dian)路(lu)檢查到，而且(qie)經(jing)過輸出級電(dian)(dian)(dian)路(lu)構(gou)(gou)(gou)成輸出信號。

三(san)線與四線式:需要區分(fen)是 NPN 型,還是 PNP 型,接線錯誤(wu),設(she)備將無法正(zheng)常動作和接受信號(hao);同時(shi)需要區分(fen) 輸(shu)出為“常開(kai)" ,還是“常閉"使(shi)用錯誤(wu),接受動作信號(hao)則(ze)正(zheng)好相(xiang)反。

五、 電感式接近開關的工作電壓

電(dian)(dian)(dian)感式(shi)接近開關一(yi)般行業(ye)默認是(shi)兩(liang)種類型: 1、 直(zhi)流輸(shu)(shu)(shu)出(chu) DC12~24V(Max10~30V) 其中(zhong)分類為:二(er)(兩(liang))線(xian)式(shi)、三線(xian)式(shi)、四線(xian)式(shi)、航空插頭式(shi)。 多(duo)凱科技可按(an)客戶所(suo)需(xu)(xu)定(ding)制低(di)電(dian)(dian)(dian)壓(ya)(ya) DC5~12V型。 2、 交流輸(shu)(shu)(shu)出(chu) AC220V (Max :60~250V) 主(zhu)要為:二(er)(兩(liang))線(xian)式(shi) 3、 定(ding)制特殊工(gong)(gong)作電(dian)(dian)(dian)壓(ya)(ya)(非標準通用電(dian)(dian)(dian)壓(ya)(ya)) 當(dang)工(gong)(gong)作電(dian)(dian)(dian)壓(ya)(ya)大于產(chan)品(pin)所(suo)規定(ding)的電(dian)(dian)(dian)壓(ya)(ya)范圍時(shi),肯能導致產(chan)品(pin)直(zhi)接損壞,或(huo)間歇式(shi)不良。 或(huo)當(dang)工(gong)(gong)作電(dian)(dian)(dian)壓(ya)(ya)不在產(chan)品(pin)所(suo)需(xu)(xu)zui低(di)電(dian)(dian)(dian)壓(ya)(ya)范圍內時(shi),產(chan)品(pin)無(wu)法啟動,故導致無(wu)信號輸(shu)(shu)(shu)出(chu)。

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