傳(chuan)感器(qi)適用于皮(pi)帶輸送機(ji)(ji)輸送物料(liao)用的，是(shi)檢(jian)(jian)測物料(liao)在皮(pi)帶上(shang)的高度，將(jiang)檢(jian)(jian)測到的物料(liao)高度轉(zhuan)換(huan)成電(dian)信號輸入給控制箱，檢(jian)(jian)測皮(pi)帶輸送機(ji)(ji)是(shi)否空(kong)載或根據(ju)物料(liao)情況(kuang)調節輸送機(ji)(ji)運行速(su)度。
傳(chuan)感器內短電(dian)(dian)脈沖(chong)(chong)驅動半(ban)導體(ti)激(ji)(ji)光(guang)(guang)二極管發(fa)射激(ji)(ji)光(guang)(guang)脈沖(chong)(chong)。激(ji)(ji)光(guang)(guang)脈沖(chong)(chong)通過(guo)準(zhun)直徑頭，形(xing)成窄激(ji)(ji)光(guang)(guang)束。激(ji)(ji)光(guang)(guang)束經過(guo)被(bei)測物(wu)體(ti)反射，通過(guo)接(jie)收(shou)鏡頭返回接(jie)收(shou)元件，產生(sheng)電(dian)(dian)脈沖(chong)(chong)，通過(guo)計算電(dian)(dian)脈沖(chong)(chong)之間(jian)的時間(jian)間(jian)隔（發(fa)射脈沖(chong)(chong)及接(jie)收(shou)脈沖(chong)(chong)）導出(chu)(chu)被(bei)測距(ju)離(li)(li)，激(ji)(ji)光(guang)(guang)光(guang)(guang)速作為恒量。檢測距(ju)離(li)(li)與設定(ding)距(ju)離(li)(li)進行(xing)比較，輸(shu)出(chu)(chu)模擬量，判斷(duan)輸(shu)送(song)帶上的料(liao)流情況。
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