視頻安防監控系統傳輸線纜你需要知道的幾個方面
視頻安防監控系統
1、最早的同軸電纜:
前幾年的模擬監控系統,是以同軸電纜傳輸為主,依據現場環境及傳輸間隔挑選所需的視頻同軸電纜,比如:傳輸間隔較遠可挑選選用光纜傳輸。根據傳輸特點傳輸間隔的遠近、環境攪擾等要素選擇線纜,根據傳輸距離遠近信號在傳輸進程中衰減,64編的傳輸間隔是150M,96編的傳輸間隔是300M,128編的傳輸間隔是380米,144編的傳輸間隔是500米。
2、網絡線纜:
(1)視頻安防監控系統晉級為網絡數字監控系統后,需選用超五類八芯雙絞網絡線來傳輸監控攝像頭獲取的視頻音頻信號;
(2)當需傳輸的間隔超越網絡線的實際最大傳輸間隔時可選用交換機中繼或是改用光纖傳輸的方法。
(3)網絡線纜在傳輸進程中會由于線纜原料及規范、環境攪擾等因素影響傳輸間隔,理論上超五類網絡線傳輸間隔可達100米(間隔超越60米時見意選用帶屏蔽層的超五類網絡線);
3、操控線纜:
(1)根據現場需求,如傳輸間隔較遠可挑選選用光纜傳輸;
(2)操控線纜(lan)由于線纜(lan)原(yuan)料及規范、環(huan)境攪(jiao)擾(rao)、傳輸間隔、波(bo)特(te)率(lv)、連接方(fang)法等要素致(zhi)使信號在傳輸進(jin)程(cheng)中衰減。
監(jian)(jian)(jian)(jian)控(kong)(kong)(kong)攝(she)像頭(tou)在電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)傳輸DC直流弱電(dian)(dian)壓時(shi)會由于(yu)線(xian)(xian)(xian)纜的(de)原料及規(gui)(gui)范(fan)、線(xian)(xian)(xian)纜中的(de)阻值、傳輸間(jian)(jian)隔(ge)等要素致使電(dian)(dian)壓降低,從而(er)使視頻(pin)安(an)防監(jian)(jian)(jian)(jian)控(kong)(kong)(kong)系統(tong)供電(dian)(dian)缺乏致使監(jian)(jian)(jian)(jian)控(kong)(kong)(kong)攝(she)像頭(tou)無法正常(chang)作業; 0.5mm2電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)線(xian)(xian)(xian)徑(jing)規(gui)(gui)范(fan)的(de)供電(dian)(dian)間(jian)(jian)隔(ge)是(shi)(shi)15米,0.75mm2電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)線(xian)(xian)(xian)徑(jing)規(gui)(gui)范(fan)的(de)供電(dian)(dian)間(jian)(jian)隔(ge)是(shi)(shi)20米,1.0mm2電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)線(xian)(xian)(xian)徑(jing)規(gui)(gui)范(fan)的(de)供電(dian)(dian)間(jian)(jian)隔(ge)是(shi)(shi)25 米,1.5mm2電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)線(xian)(xian)(xian)徑(jing)規(gui)(gui)范(fan)的(de)供電(dian)(dian)間(jian)(jian)隔(ge)是(shi)(shi)35米,2.0mm2電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)線(xian)(xian)(xian)徑(jing)規(gui)(gui)范(fan)的(de)供電(dian)(dian)間(jian)(jian)隔(ge)是(shi)(shi)45米,2.5mm2電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)線(xian)(xian)(xian)徑(jing)規(gui)(gui)范(fan)的(de)供電(dian)(dian)間(jian)(jian)隔(ge)是(shi)(shi)55米,在 監(jian)(jian)(jian)(jian)控(kong)(kong)(kong)攝(she)像機(ji)裝置敷(fu)設電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian)纜時(shi)應按照(zhao)上面所示的(de)參數來挑選(xuan)相應的(de)電(dian)(dian)源(yuan)(yuan)(yuan)線(xian)(xian)(xian),以確保監(jian)(jian)(jian)(jian)控(kong)(kong)(kong)攝(she)像機(ji)可(ke)以取得滿足(zu)的(de)電(dian)(dian)力(li)而(er)正常(chang)作業。
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