一、電動云臺是什么

電動云臺是用于安裝攝像機，它在控制電壓（云臺控制器輸出的電壓）的作用下，做水平和垂直轉動，使攝像機能在大范圍內對準并攝取所需要的觀察目標。按旋轉角度可分(fen)為限位(wei)型和(he)連續旋轉型。當攝(she)像機需做(zuo)多方(fang)位場(chang)景監視時，應配備遙控電動云臺。

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二、電動云臺的控制原理

全方位(wei)云(yun)臺(tai)(tai)內部(bu)有兩個電(dian)(dian)(dian)機，分(fen)別負責云(yun)臺(tai)(tai)的(de)上(shang)下和左右各方向的(de)轉(zhuan)(zhuan)動(dong)(dong)。其(qi)工(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓的(de)不(bu)同也決定了該云(yun)臺(tai)(tai)的(de)整體工(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓，一般(ban)有交流 24V、交流220V及直(zhi)流12V。當接到(dao)上(shang)、下動(dong)(dong)作(zuo)(zuo)電(dian)(dian)(dian)壓時，垂直(zhi)電(dian)(dian)(dian)機轉(zhuan)(zhuan)動(dong)(dong)，經(jing)減(jian)速(su)箱帶動(dong)(dong)垂直(zhi)傳動(dong)(dong)輪盤(pan)(pan)轉(zhuan)(zhuan)動(dong)(dong)；當接到(dao)左、右動(dong)(dong)作(zuo)(zuo)電(dian)(dian)(dian)壓時，水平(ping)電(dian)(dian)(dian)機轉(zhuan)(zhuan)動(dong)(dong)并(bing)經(jing)減(jian)速(su)箱帶動(dong)(dong)云(yun)臺(tai)(tai)底部(bu)的(de)水平(ping)齒輪盤(pan)(pan)轉(zhuan)(zhuan)動(dong)(dong)。

需(xu)要(yao)說明的是(shi)云(yun)(yun)臺(tai)都有水平、垂直的限(xian)(xian)(xian)位(wei)栓(shuan)，云(yun)(yun)臺(tai)分別(bie)由兩個微動(dong)(dong)開關實(shi)現限(xian)(xian)(xian)位(wei)功能(neng)。當轉(zhuan)動(dong)(dong)角度達到預(yu)先設(she)定的限(xian)(xian)(xian)位(wei)栓(shuan)時，微動(dong)(dong)開關動(dong)(dong)作切斷(duan)電源(yuan)，云(yun)(yun)臺(tai)停止轉(zhuan)動(dong)(dong)。限(xian)(xian)(xian)位(wei)裝置可(ke)以位(wei)于(yu)云(yun)(yun)臺(tai)外部(bu)，調(diao)整過(guo)程(cheng)簡單，也可(ke)以位(wei)于(yu)云(yun)(yun)臺(tai)內部(bu)，通過(guo)外設(she)的調(diao)整機構(gou)進行(xing)調(diao)整，調(diao)整過(guo)程(cheng)相對(dui)復雜(za)。但外置限(xian)(xian)(xian)位(wei)裝置的云(yun)(yun)臺(tai)密封性不如(ru)內置限(xian)(xian)(xian)位(wei)裝置的云(yun)(yun)臺(tai)。

室(shi)(shi)外云(yun)(yun)(yun)臺與室(shi)(shi)內云(yun)(yun)(yun)臺大體一致，只是由于室(shi)(shi)外防(fang)護(hu)罩(zhao)重(zhong)(zhong)量較大，使云(yun)(yun)(yun)臺的(de)載重(zhong)(zhong)能力必須加大。同(tong)時，室(shi)(shi)外環(huan)境的(de)冷(leng)熱變(bian)化(hua)大， 易(yi)遭到雨水或潮濕的(de)侵蝕。因此(ci)室(shi)(shi)外云(yun)(yun)(yun)臺一般都設計成密封防(fang)雨型。另外室(shi)(shi)外云(yun)(yun)(yun)臺還具有高轉矩和扼流(liu)保護(hu)電(dian)路(lu)以(yi)防(fang)止云(yun)(yun)(yun)臺凍結時強(qiang)行起動而燒毀電(dian)機。在低溫(wen)的(de)惡劣條件下還可以(yi)在云(yun)(yun)(yun)臺內部加裝溫(wen)控型加熱器(qi)。