光電開(kāi)關(guān)檢測(cè)技術(shù)ppt課件-文庫(kù)吧資料
2024-12-14 03:21本頁(yè)面
【正文】 并形成一光軸，當(dāng)被檢測(cè)物體經(jīng)過(guò) U型槽且阻斷光軸時(shí)，光電開(kāi)關(guān)就產(chǎn)生了檢測(cè)到的開(kāi)關(guān)量信號(hào)。當(dāng)被檢測(cè)物體經(jīng)過(guò)發(fā)射器和接收器之間且阻斷光線(xiàn)時(shí)，光電開(kāi)關(guān)就產(chǎn)生了開(kāi)關(guān)信號(hào)。當(dāng)被檢測(cè)物體的表面光亮或其反光率極高時(shí)，漫反射式的光電開(kāi)關(guān)是首選的檢測(cè)模式。檢測(cè)技術(shù) 光電開(kāi)關(guān) 光電開(kāi)關(guān) 漫反射式光電開(kāi)關(guān) 鏡反射式光電開(kāi)關(guān) 對(duì)射式光電開(kāi)關(guān) 槽式光電開(kāi)關(guān) 光纖式光電開(kāi)關(guān) 光電開(kāi)關(guān) 光電開(kāi)關(guān) 工作原理 光電開(kāi)關(guān)（光電傳感器）是利用被檢測(cè)物體對(duì)光束的遮光或反射，由同步回路選通而檢測(cè)物體的有無(wú)，所檢測(cè)的物體不限于金屬， 對(duì)所有能反射光線(xiàn)的物體均可檢測(cè) 。 光電開(kāi)關(guān) 工作原理 Principle of Photoelectric Sensor Principle of Photoelectric Sensor Emitting method Pulsemodulated Most of the photoelectric sensors emit a beam which is pulsemodulated. In this method, a strong optical signal of fixed width is emitted at a fixed time interval. This helps the receiver to distinguish the signal from extraneous light and to achieve a long sensing range. Principle of Photoelectric Sensor Principle of Photoelectric Sensor Unmodulated The highspeed fiber sensor
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