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光電開關(guān)主要用于冶金工業(yè)系統(tǒng)中,對生產(chǎn)線上運(yùn)動(dòng)工作位置的檢測。
光電開關(guān)有內(nèi)部產(chǎn)生振蕩,經(jīng)過調(diào)制由紅外發(fā)光二極管發(fā)出調(diào)制的紅外光,經(jīng)光敏管接收放大后,輸出一開關(guān)量信號。