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(zhuan)角度可分為限位型和(he)連續旋轉(zhuan)型。當攝像機需(xu)做多(duo)方位場景監視時，應(ying)配(pei)備遙控電(dian)動云臺。

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二、電動云臺的控制原理

全方位云(yun)(yun)臺內部(bu)有兩個電(dian)(dian)(dian)機(ji)，分(fen)別負責云(yun)(yun)臺的(de)(de)上(shang)(shang)下和左(zuo)右(you)各方向的(de)(de)轉(zhuan)(zhuan)動(dong)(dong)。其工(gong)作電(dian)(dian)(dian)壓的(de)(de)不(bu)同也決定了該云(yun)(yun)臺的(de)(de)整體(ti)工(gong)作電(dian)(dian)(dian)壓，一般有交流(liu) 24V、交流(liu)220V及直(zhi)流(liu)12V。當接(jie)到(dao)上(shang)(shang)、下動(dong)(dong)作電(dian)(dian)(dian)壓時，垂(chui)(chui)直(zhi)電(dian)(dian)(dian)機(ji)轉(zhuan)(zhuan)動(dong)(dong)，經(jing)減(jian)速箱帶動(dong)(dong)垂(chui)(chui)直(zhi)傳動(dong)(dong)輪盤(pan)(pan)轉(zhuan)(zhuan)動(dong)(dong)；當接(jie)到(dao)左(zuo)、右(you)動(dong)(dong)作電(dian)(dian)(dian)壓時，水平(ping)電(dian)(dian)(dian)機(ji)轉(zhuan)(zhuan)動(dong)(dong)并經(jing)減(jian)速箱帶動(dong)(dong)云(yun)(yun)臺底(di)部(bu)的(de)(de)水平(ping)齒輪盤(pan)(pan)轉(zhuan)(zhuan)動(dong)(dong)。

需(xu)要說明的(de)(de)是云(yun)(yun)臺(tai)都有(you)水平(ping)、垂直的(de)(de)限(xian)(xian)位(wei)栓(shuan)，云(yun)(yun)臺(tai)分(fen)別由兩個微動(dong)開關實(shi)現(xian)限(xian)(xian)位(wei)功(gong)能(neng)。當轉動(dong)角度達到預先設定的(de)(de)限(xian)(xian)位(wei)栓(shuan)時，微動(dong)開關動(dong)作切斷電源，云(yun)(yun)臺(tai)停止轉動(dong)。限(xian)(xian)位(wei)裝置(zhi)(zhi)可以位(wei)于(yu)云(yun)(yun)臺(tai)外(wai)部，調整(zheng)過(guo)程(cheng)簡單，也可以位(wei)于(yu)云(yun)(yun)臺(tai)內(nei)部，通(tong)過(guo)外(wai)設的(de)(de)調整(zheng)機構進(jin)行調整(zheng)，調整(zheng)過(guo)程(cheng)相對復雜。但外(wai)置(zhi)(zhi)限(xian)(xian)位(wei)裝置(zhi)(zhi)的(de)(de)云(yun)(yun)臺(tai)密(mi)封性不如內(nei)置(zhi)(zhi)限(xian)(xian)位(wei)裝置(zhi)(zhi)的(de)(de)云(yun)(yun)臺(tai)。

室外(wai)云(yun)(yun)(yun)臺(tai)(tai)(tai)與室內(nei)云(yun)(yun)(yun)臺(tai)(tai)(tai)大體一(yi)致，只是由于(yu)室外(wai)防(fang)護罩重量(liang)較大，使云(yun)(yun)(yun)臺(tai)(tai)(tai)的載重能力必須加(jia)大。同時(shi)，室外(wai)環境(jing)的冷熱(re)變(bian)化大， 易遭到雨水或潮濕的侵蝕。因此(ci)室外(wai)云(yun)(yun)(yun)臺(tai)(tai)(tai)一(yi)般都設計(ji)成密封防(fang)雨型(xing)。另外(wai)室外(wai)云(yun)(yun)(yun)臺(tai)(tai)(tai)還具有高轉矩和扼(e)流保護電路以防(fang)止云(yun)(yun)(yun)臺(tai)(tai)(tai)凍結(jie)時(shi)強行起動而(er)燒毀電機(ji)。在低溫的惡劣條(tiao)件下(xia)還可以在云(yun)(yun)(yun)臺(tai)(tai)(tai)內(nei)部加(jia)裝溫控型(xing)加(jia)熱(re)器。