SICK光電開關(guān)(光電傳感器)是光電接近開關(guān)的簡(jiǎn)稱,它是利用被檢測(cè)物對(duì)光束的遮擋或反射,由同步回路選通電路,從而檢測(cè)物體有無的。物體不限于金屬,所有能反射光線的物體均可被檢測(cè)。SICK光電開關(guān)將輸入電流在發(fā)射器上轉(zhuǎn)換為光信號(hào)射出,接收器再根據(jù)接收到的光線的強(qiáng)弱或有無對(duì)目標(biāo)物體進(jìn)行探測(cè)。安防系統(tǒng)中常見的SICK光電開關(guān)煙霧報(bào)警器,工業(yè)中經(jīng)常用它來記數(shù)機(jī)械臂的運(yùn)動(dòng)次數(shù)。
光電開關(guān)非常適合安裝空間受限的場(chǎng)合,大部分迷你型普通LED光源的漫反射式光電開關(guān)檢測(cè)距離在1米以內(nèi),鏡反射光電開關(guān)檢測(cè)距離10米以內(nèi),對(duì)射型光電開關(guān)在20米左右,而激光光源光電開關(guān)的檢測(cè)距離會(huì)高于這個(gè)范圍。對(duì)應(yīng)于小型和緊湊型的光電開關(guān),檢測(cè)距離會(huì)進(jìn)一步延伸,西克目前可提供遠(yuǎn)的對(duì)射型光電開關(guān)距離可達(dá)350米。
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