天眼都(dou)知道是什么吧。在(zai)監控攝像頭(tou)隨處(chu)布滿的時代總(zong)是給人安心的感覺。
在這個高清(qing)(qing)時(shi)期,到(dao)處都可(ke)以看到(dao)高清(qing)(qing)的(de)產品,如(ru)高清(qing)(qing)低照(zhao)度攝像機(ji)、高清(qing)(qing)網絡攝像機(ji)、高清(qing)(qing)紅外攝像機(ji)等。下(xia)面重慶監控(kong)萬建電子的(de)小編就來分享下(xia)高清(qing)(qing)紅外攝像機(ji)的(de)中心(xin)要點(dian)。
感(gan)光(guang)(guang)(guang)(guang)芯片(pian):感(gan)光(guang)(guang)(guang)(guang)芯片(pian)是(shi)一(yi)(yi)個(ge)攝像機(ji)的(de)(de)眼球它的(de)(de)好壞直接決定(ding)著攝像機(ji)成像品質(zhi),尤(you)其是(shi)紅外攝像機(ji)在夜(ye)晚光(guang)(guang)(guang)(guang)線不充足(zu)的(de)(de)物質(zhi)情(qing)形下,顯得尤(you)為重要。感(gan)光(guang)(guang)(guang)(guang)芯片(pian)分為CCD和CMOS兩(liang)種,兩(liang)者基本上都是(shi)覺(jue)得合適(shi)而(er)運(yun)(yun)用矽感(gan)光(guang)(guang)(guang)(guang)二極(ji)體(ti)進行光(guang)(guang)(guang)(guang)電(dian)更換。但由于(yu)兩(liang)者構(gou)造不同:CMOS每個(ge)像素(su)有(you)立的(de)(de)放(fang)大器;CCD則覺(jue)得合適(shi)而(er)運(yun)(yun)用電(dian)荷傳交方(fang)式輸(shu)出信號,整(zheng)個(ge)像素(su)覺(jue)得合適(shi)而(er)運(yun)(yun)用同一(yi)(yi)放(fang)大器進行信號放(fang)大。
鏡(jing)頭(tou)(tou):高清(qing)紅(hong)外攝像機挑選(xuan)(xuan)鏡(jing)頭(tou)(tou),除(chu)了(le)高清(qing)外,首先是必須選(xuan)(xuan)用(yong)帶IR功能的紅(hong)外鏡(jing)頭(tou)(tou),假設覺得合適而(er)運用(yong)平常的不(bu)感紅(hong)外鏡(jing)頭(tou)(tou),會(hui)由(you)于白(bai)天(tian)里可見光(guang)(guang)和夜(ye)晚(wan)補的紅(hong)外光(guang)(guang)波段(duan)不(bu)同,造(zao)成鏡(jing)頭(tou)(tou)成像焦點偏移,圖像白(bai)天(tian)里清(qing)楚夜(ye)晚(wan)模(mo)糊的現象(xiang);再者在焦距一(yi)定的物質(zhi)情(qing)形(xing)下(xia),盡量(liang)選(xuan)(xuan)用(yong)光(guang)(guang)圈F小的鏡(jing)頭(tou)(tou),光(guang)(guang)圈越小,進光(guang)(guang)量(liang)越大。
DSP處(chu)置芯片(pian):假設說感光(guang)芯片(pian)是攝(she)像(xiang)(xiang)(xiang)機的眼球(qiu),那DSP就(jiu)是攝(she)像(xiang)(xiang)(xiang)機的大腦,它不止(zhi)控制CCD信號的搜集,并且(qie)對信號進行頻(pin)譜分析、數字濾波、智能分析等(deng)。所以(yi)DSP功能的強(qiang)弱直接影響著圖像(xiang)(xiang)(xiang)品質(zhi)。但之(zhi)前運用在攝(she)像(xiang)(xiang)(xiang)機上DSP片(pian),一樣 sony、sharp進行捆綁CCD方式銷售,造成即使其他(ta)公司(si)有好(hao)的DSP圖像(xiang)(xiang)(xiang)處(chu)置技術,也(ye)難在安防攝(she)像(xiang)(xiang)(xiang)機領域(yu)以(yi)示拳術。
攝(she)(she)像機(ji)(ji)外殼(ke)(ke):高清紅外攝(she)(she)像機(ji)(ji)外殼(ke)(ke)主要(yao)起三(san)個作用:1,固(gu)定(ding)有(you)關(guan)PCB;2.對(dui)(dui)PCB進行防水(shui)(shui)盡量照顧;3.對(dui)(dui)LED進行散熱(re);固(gu)定(ding)PCB功能(neng)(neng)毋庸懷(huai)疑,對(dui)(dui)PCB的(de)防水(shui)(shui)性能(neng)(neng)則大(da)有(you)講究,現在有(you)兩種(zhong)預(yu)設深刻深思的(de)線索,要(yao)不外殼(ke)(ke)整個堵牢,水(shui)(shui)汽一些都不可以(yi)以(yi)進入了,要(yao)不留出通(tong)氣孔,擔保攝(she)(she)像機(ji)(ji)內(nei)(nei)里和大(da)氣能(neng)(neng)很好對(dui)(dui)流(liu)通(tong)過蒸發(fa)使(shi)攝(she)(she)像機(ji)(ji)內(nei)(nei)里水(shui)(shui)汽盡量加(jia)快散去。
紅外(wai)LED補(bu)光(guang)(guang)燈(deng)(deng)板:到現在截止紅外(wai)攝像機常(chang)用三種(zhong)光(guang)(guang)線波長的紅外(wai)補(bu)光(guang)(guang)燈(deng)(deng),紅外(wai)波段為810nm,850nm,940nm。810nm一(yi)樣用于激(ji)光(guang)(guang)紅外(wai)燈(deng)(deng)板,由于激(ji)光(guang)(guang)出(chu)光(guang)(guang)角度小,光(guang)(guang)線集(ji)中(zhong)(zhong),故(gu)激(ji)光(guang)(guang)紅外(wai)燈(deng)(deng)一(yi)樣運用在夜晚(wan)中(zhong)(zhong)遠距(ju)離監控。
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