BANNER邦納光電傳感器結構材質

把發(fa)光(guang)(guang)(guang)器(qi)和(he)收(shou)光(guang)(guang)(guang)器(qi)裝入同(tong)一個裝置(zhi)內，在前方裝一塊反(fan)(fan)光(guang)(guang)(guang)板，利用反(fan)(fan)射原理完成光(guang)(guang)(guang)電控(kong)制作(zuo)用，稱為反(fan)(fan)光(guang)(guang)(guang)板反(fan)(fan)射式(或反(fan)(fan)射鏡(jing)反(fan)(fan)射式)光(guang)(guang)(guang)電開(kai)關。正常情況下，發(fa)光(guang)(guang)(guang)器(qi)發(fa)出的光(guang)(guang)(guang)源被反(fan)(fan)光(guang)(guang)(guang)板反(fan)(fan)射回來再被收(shou)光(guang)(guang)(guang)器(qi)收(shou)到;一旦被檢測物擋住(zhu)光(guang)(guang)(guang)路，收(shou)光(guang)(guang)(guang)器(qi)收(shou)不到光(guang)(guang)(guang)時(shi)，光(guang)(guang)(guang)電開(kai)關就動(dong)作(zuo)，輸出一個開(kai)關控(kong)制信號。

光(guang)(guang)(guang)敏三(san)極管(guan)(guan)(guan)(guan)除了具有光(guang)(guang)(guang)敏二極管(guan)(guan)(guan)(guan)能(neng)將光(guang)(guang)(guang)信(xin)號(hao)轉換(huan)成電(dian)(dian)(dian)(dian)信(xin)號(hao)的(de)功能(neng)外(wai)，還有對(dui)電(dian)(dian)(dian)(dian)信(xin)號(hao)放大(da)(da)的(de)功能(neng)。光(guang)(guang)(guang)敏三(san)級管(guan)(guan)(guan)(guan)的(de)外(wai)型與一(yi)般三(san)極管(guan)(guan)(guan)(guan)相差(cha)不大(da)(da)，一(yi)般光(guang)(guang)(guang)敏三(san)極管(guan)(guan)(guan)(guan)只引出(chu)兩個極--發射(she)(she)(she)極和集電(dian)(dian)(dian)(dian)極，基極不引出(chu)，管(guan)(guan)(guan)(guan)殼(ke)同(tong)樣開窗口，以便光(guang)(guang)(guang)線射(she)(she)(she)入。為增(zeng)大(da)(da)光(guang)(guang)(guang)照，基區面積做(zuo)得很大(da)(da)，發射(she)(she)(she)區較(jiao)小(xiao)，入射(she)(she)(she)光(guang)(guang)(guang)主要(yao)被基區吸收。工(gong)作時(shi)集電(dian)(dian)(dian)(dian)結(jie)反偏，發射(she)(she)(she)結(jie)正偏。在無光(guang)(guang)(guang)照時(shi)管(guan)(guan)(guan)(guan)子(zi)流(liu)(liu)(liu)(liu)過的(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)為暗電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)Iceo=(1+β)Icbo(很小(xiao))，比(bi)一(yi)般三(san)極管(guan)(guan)(guan)(guan)的(de)穿透電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)還小(xiao);當有光(guang)(guang)(guang)照時(shi)，激發大(da)(da)量的(de)電(dian)(dian)(dian)(dian)子(zi)-空穴(xue)對(dui)，使得基極產生的(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)Ib增(zeng)大(da)(da)，此刻流(liu)(liu)(liu)(liu)過管(guan)(guan)(guan)(guan)子(zi)的(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)稱為光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，發射(she)(she)(she)極電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)Ie=(1+β)Ib，可見(jian)光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)三(san)極管(guan)(guan)(guan)(guan)要(yao)比(bi)光(guang)(guang)(guang)電(dian)(dian)(dian)(dian)二極管(guan)(guan)(guan)(guan)具有更高的(de)靈(ling)敏度。

微型(xing)，經(jing)濟高(gao)效的傳(chuan)感器，適用于空間受(shou)限(xian)的環(huan)境

包括(kuo)定區(qu)域式(shi)，對射(she)(she)式(shi)，偏(pian)振反射(she)(she)板式(shi)和反射(she)(she)板式(shi)

把一個(ge)光(guang)(guang)(guang)(guang)發(fa)射器(qi)和一個(ge)接收器(qi)面對面地(di)裝在一個(ge)槽的兩側組成(cheng)(cheng)槽形光(guang)(guang)(guang)(guang)電(dian)。發(fa)光(guang)(guang)(guang)(guang)器(qi)能(neng)發(fa)出紅外光(guang)(guang)(guang)(guang)或可見光(guang)(guang)(guang)(guang)，在無(wu)阻情況下(xia)光(guang)(guang)(guang)(guang)接收器(qi)能(neng)收到光(guang)(guang)(guang)(guang)。但當被(bei)檢(jian)測物體從(cong)槽中(zhong)通過時，光(guang)(guang)(guang)(guang)被(bei)遮擋，光(guang)(guang)(guang)(guang)電(dian)開(kai)關(guan)便(bian)動作(zuo)，輸(shu)出一個(ge)開(kai)關(guan)控制(zhi)信號(hao)，切斷(duan)或接通負載電(dian)流(liu)，從(cong)而(er)完成(cheng)(cheng)一次控制(zhi)動作(zuo)。槽形開(kai)關(guan)的檢(jian)測距離因為受整體結構的限制(zhi)一般只有(you)幾厘米。

⑵對(dui)射(she)型光(guang)電(dian)(dian)傳(chuan)感(gan)器(qi)，若把發(fa)光(guang)器(qi)和(he)收光(guang)器(qi)分(fen)(fen)離(li)開(kai)，就可使檢測(ce)距(ju)離(li)加大，一(yi)個(ge)發(fa)光(guang)器(qi)和(he)一(yi)個(ge)收光(guang)器(qi)組成對(dui)射(she)分(fen)(fen)離(li)式(shi)光(guang)電(dian)(dian)開(kai)關，簡稱對(dui)射(she)式(shi)光(guang)電(dian)(dian)開(kai)關。對(dui)射(she)式(shi)光(guang)電(dian)(dian)開(kai)關的(de)檢測(ce)距(ju)離(li)可達幾米乃至幾十(shi)米。使用對(dui)射(she)式(shi)光(guang)電(dian)(dian)開(kai)關時把發(fa)光(guang)器(qi)和(he)收光(guang)器(qi)分(fen)(fen)別裝在檢測(ce)物通過路(lu)徑(jing)的(de)兩側，檢測(ce)物通過時阻(zu)擋光(guang)路(lu)，收光(guang)器(qi)就動作(zuo)輸出一(yi)個(ge)開(kai)關控制信號。

包覆成型的外殼，帶有高度可(ke)見的移印，增強了(le)耐用性

對射式(shi)和(he)反射板式(shi)的感應范圍(wei)增加了

通過(guo)堅固的(de)金屬襯里安裝(zhuang)孔(kong)直接安裝(zhuang)到設備上或(huo)內部

BANNER邦納光電傳感(gan)器結(jie)構材質(zhi)