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安防監控系(xi)統施工中(zhong)無線網(wang)橋的安裝要求(qiu)
時間:2019-09-10 來源:成都萬(wan)全電子 瀏(liu)覽:2341次
安(an)防監控系統施工中無線網橋的安(an)裝要求
安(an)防監(jian)控系統施(shi)工(gong)中經常(chang)會(hui)用(yong)到無線(xian)網(wang)(wang)橋,特別(bie)是對于(yu)戶外和(he)電(dian)梯的(de)安防(fang)監控系統信號(hao)傳輸,無線(xian)網(wang)(wang)橋技術不僅(jin)可以降低施(shi)工(gong)難度,而且還可以節約施(shi)工(gong)成本。影響無線(xian)網(wang)(wang)橋的(de)傳輸性能(neng)的(de)因素主要(yao)有設備參數和(he)安裝方式兩個方面。今天我們就來說(shuo)說(shuo)無線(xian)網(wang)(wang)橋的(de)安裝要(yao)求和(he)注意事項。
無線網橋安裝(zhuang)要求
1. 無線網(wang)橋安(an)裝(zhuang)高度
無線(xian)(xian)(xian)(xian)網橋(qiao)在(zai)(zai)實(shi)際安裝中,我們(men)經(jing)常會遇到(dao)(dao)樹木、大樓等障(zhang)礙物(wu)(wu)的(de)(de)阻(zu)隔(ge)。這種(zhong)阻(zu)擋(dang)都會對網橋(qiao)信號(hao)傳(chuan)輸產生影響。為了防(fang)止信號(hao)受到(dao)(dao)障(zhang)礙物(wu)(wu)的(de)(de)阻(zu)隔(ge),我們(men)在(zai)(zai)施(shi)工(gong)安裝時(shi)應盡量避開建筑物(wu)(wu),防(fang)止信號(hao)受到(dao)(dao)阻(zu)隔(ge),滿足兩(liang)段(duan)相互(hu)可視(shi)的(de)(de)傳(chuan)輸條件。兩(liang)端可視(shi)不能(neng)(neng)簡單的(de)(de)理(li)解為點(dian)對點(dian)可視(shi)即(ji)可,指的(de)(de)是在(zai)(zai)天(tian)線(xian)(xian)(xian)(xian)傳(chuan)播的(de)(de)菲涅(nie)爾(er)區(無線(xian)(xian)(xian)(xian)電波術語)內不能(neng)(neng)有(you)障(zhang)礙物(wu)(wu)也(ye)不能(neng)(neng)有(you)潛在(zai)(zai)障(zhang)礙物(wu)(wu)。天(tian)線(xian)(xian)(xian)(xian)之(zhi)(zhi)間的(de)(de)主要的(de)(de)射頻能(neng)(neng)量在(zai)(zai)此區域傳(chuan)輸,所以發射天(tian)線(xian)(xian)(xian)(xian)必須高于障(zhang)礙物(wu)(wu)足夠的(de)(de)高度來使它和接收天(tian)線(xian)(xian)(xian)(xian)之(zhi)(zhi)間保(bao)持視(shi)線(xian)(xian)(xian)(xian)路徑,以保(bao)證通信鏈路正常工(gong)作。
2. 無線網橋(qiao)的安(an)裝角度和信號調試(shi)
無(wu)線(xian)(xian)(xian)(xian)網橋信(xin)號(hao)的(de)(de)強弱關系(xi)到安防監控系(xi)統(tong)信(xin)號(hao)傳輸的(de)(de)穩定性(xing)和速率。所以在(zai)安裝好(hao)無(wu)線(xian)(xian)(xian)(xian)網橋之后(hou)需要對其進一步(bu)調(diao)試。通(tong)過調(diao)節無(wu)線(xian)(xian)(xian)(xian)網橋的(de)(de)天線(xian)(xian)(xian)(xian)角(jiao)度、方(fang)向,觀察(cha)網橋信(xin)號(hao)狀態指示燈顯示的(de)(de)信(xin)號(hao)強度,或(huo)者利(li)用軟件(jian)查看信(xin)號(hao)的(de)(de)強度狀況(kuang),找到信(xin)號(hao)最佳的(de)(de)角(jiao)度。
3. 防雷接地
戶外(wai)安(an)裝無(wu)(wu)線(xian)(xian)網(wang)橋(qiao)的時候,若如今沒有較高建筑物及避雷針的保護,就需(xu)要加裝避雷針。避雷針可以保護無(wu)(wu)線(xian)(xian)網(wang)橋(qiao)設備(bei)不被雷擊。避雷針與無(wu)(wu)線(xian)(xian)網(wang)橋(qiao)設備(bei)需(xu)絕緣隔離,避雷針需(xu)接地,但不能(neng)與無(wu)(wu)線(xian)(xian)網(wang)橋(qiao)共(gong)用(yong)一個接地端。
4. 設備供(gong)電
針對(dui)POE供(gong)電(dian)(dian)的無線(xian)網(wang)(wang)橋,供(gong)電(dian)(dian)電(dian)(dian)壓(ya)應與設備(bei)的額定電(dian)(dian)壓(ya)想(xiang)匹配,高于或低于無線(xian)網(wang)(wang)橋的額定電(dian)(dian)壓(ya)都可以會(hui)導致設備(bei)損壞,影響(xiang)信(xin)號傳輸(shu)。最好使用穩壓(ya)電(dian)(dian)源或UPS供(gong)電(dian)(dian)。使用POE供(gong)電(dian)(dian)模塊通過網(wang)(wang)線(xian)供(gong)電(dian)(dian)時,建議距離不(bu)超過60米(mi),避(bi)免(mian)距離太遠出現(xian)電(dian)(dian)壓(ya)不(bu)穩。
市(shi)電供電的無線網橋(qiao),應(ying)與大功率(lv)設(she)備分開供電。若必須在同一位置取電,應(ying)加裝穩壓(ya)電源或隔離(li)變壓(ya)器,避免大功率(lv)設(she)備工作時對無線網橋(qiao)供電產生影響。
無線(xian)網橋在施(shi)工安裝過程中還(huan)應注意線(xian)路(lu)接口處(chu)的(de)防(fang)水、絕緣(yuan)處(chu)理,同時無論是支架還(huan)是設備安裝一定要牢(lao)固,避免極(ji)端天氣下,信號受影響(xiang)或設備脫(tuo)落,造成(cheng)更(geng)大影響(xiang)。