工作原理簡介
帶電電纜識別儀的發(fa)射(she)機(ji)和(he)接收(shou)(shou)(shou)機(ji)采用單片機(ji)編碼、解(jie)碼技術(shu)和(he)廣泛應用在(zai)(zai)通信領域(yu)里的PSK技術(shu)。在(zai)(zai)發(fa)射(she)卡(ka)鉗(qian)(qian)上發(fa)射(she)平均值為0 的相(xiang)位(wei)編碼信號，接收(shou)(shou)(shou)機(ji)中的單片機(ji)對接收(shou)(shou)(shou)的信號經(jing)過硬件和(he)軟件的濾波后，再進行(xing)相(xiang)位(wei)識別。將發(fa)射(she)卡(ka)鉗(qian)(qian)和(he)接收(shou)(shou)(shou)卡(ka)鉗(qian)(qian)的箭頭(tou)指(zhi)向(xiang)電(dian)(dian)纜(lan)(lan)終(zhong)端，當接收(shou)(shou)(shou)機(ji)卡(ka)鉗(qian)(qian)鉗(qian)(qian)住某根電(dian)(dian)纜(lan)(lan)，接收(shou)(shou)(shou)機(ji)電(dian)(dian)流(liu)表(biao)右(you)偏，同時伴(ban)有(you)聲光指(zhi)示。而鉗(qian)(qian)住其它的電(dian)(dian)纜(lan)(lan)，電(dian)(dian)流(liu)表(biao)左(zuo)偏，電(dian)(dian)流(liu)方向(xiang)與被識別電(dian)(dian)纜(lan)(lan)的電(dian)(dian)流(liu)方向(xiang)相(xiang)反，沒有(you)聲光指(zhi)示。這(zhe)就體現了(le)被識別的目標電(dian)(dian)纜(lan)(lan)的特性。很容易將被識別電(dian)(dian)纜(lan)(lan)從多根電(dian)(dian)纜(lan)(lan)中做出明確判別。又由于被識別電(dian)(dian)纜(lan)(lan)上的信號電(dian)(dian)流(liu)強度全線都是一(yi)樣的，接收(shou)(shou)(shou)卡(ka)鉗(qian)(qian)在(zai)(zai)電(dian)(dian)纜(lan)(lan)沿線所接收(shou)(shou)(shou)到的電(dian)(dian)磁(ci)信號強度一(yi)致，識別的電(dian)(dian)纜(lan)(lan)不(bu)受被識別電(dian)(dian)纜(lan)(lan)長度的限制。

電(dian)(dian)纜(lan)(lan)識別儀在電(dian)(dian)力電(dian)(dian)纜(lan)(lan)架(jia)設、遷移(yi)、維護以及故障處理中用來判別一束電(dian)(dian)纜(lan)(lan)中欲(yu)尋找的(de)一根(gen)特定的(de)電(dian)(dian)纜(lan)(lan)；具有判別電(dian)(dian)纜(lan)(lan)準(zhun)確、快(kuai)速(su)、操作簡單(dan)、應(ying)用范圍(wei)廣(guang)等特點。它是(shi)電(dian)(dian)纜(lan)(lan)施(shi)工(gong)及維護工(gong)作中*的(de)檢測儀器。

LYDS-II型帶電電纜識別儀主要特點

本(ben)儀器由電(dian)(dian)(dian)(dian)纜(lan)識(shi)(shi)別(bie)發射(she)機，電(dian)(dian)(dian)(dian)纜(lan)識(shi)(shi)別(bie)接(jie)收機、發射(she)卡鉗(qian)和(he)接(jie)收卡鉗(qian)及(ji)輸出信(xin)號(hao)連接(jie)線組成。它(ta)具有(you)(you)大(da)(da)功率(lv)電(dian)(dian)(dian)(dian)流(liu)脈(mo)沖輸出；現(xian)場(chang)接(jie)收信(xin)號(hao)特征清晰，輕便靈活，靈敏度高，能有(you)(you)效(xiao)(xiao)抑制現(xian)場(chang)工(gong)頻干擾(rao)；判(pan)斷準確、快速；保護電(dian)(dian)(dian)(dian)路(lu)可靠，不怕輸出短路(lu)；大(da)(da)鉗(qian)口(kou)ф125適合各(ge)種(zhong)截面(mian)積的(de)(de)動(dong)力(li)電(dian)(dian)(dian)(dian)纜(lan)；內部具有(you)(you)大(da)(da)功率(lv)隔(ge)離變壓(ya)器，操作者與市(shi)電(dian)(dian)(dian)(dian)不存在任何電(dian)(dian)(dian)(dian)氣上(shang)的(de)(de)直接(jie)接(jie)觸。極大(da)(da)的(de)(de)保證了人身安(an)全。帶電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)纜(lan)識(shi)(shi)別(bie)時不需要斷開各(ge)電(dian)(dian)(dian)(dian)纜(lan)兩端與變配電(dian)(dian)(dian)(dian)設備間的(de)(de)連接(jie)，可在電(dian)(dian)(dian)(dian)纜(lan)處于(yu)帶電(dian)(dian)(dian)(dian)的(de)(de)狀態下進行在線識(shi)(shi)別(bie)，提高了識(shi)(shi)別(bie)的(de)(de)效(xiao)(xiao)率(lv)，大(da)(da)大(da)(da)減少了由于(yu)停電(dian)(dian)(dian)(dian)所(suo)造成的(de)(de)直接(jie)和(he)間接(jie)的(de)(de)經濟損失。

本(ben)儀器的最大特點是(shi)：

1、將帶電(dian)識(shi)別和不帶電(dian)識(shi)別功能合二為一(yi)，不僅適合停運電(dian)纜(lan)的識(shi)別與判斷，而且也適合帶點電(dian)纜(lan)的識(shi)別與判斷，操作(zuo)極其簡單，使用(yong)非常方(fang)便。

2、該電纜識別儀與常規的識別儀不同，采用了最新的通信技術，在發射端采用單片機技術對發射信號進行編碼、功率驅動，將信號耦合到電纜上；接收機中的單片機對接收的相位編碼信號解碼和相位識別。根據目標電纜上的信號相位特征的特性將目標電纜從一大束電纜中識別出來。因此工作性能可靠，對超長電纜也能做到準確判別，是一種輕小型、緊湊型、便攜式儀器。適用于各種類型的高低壓動力電纜。

LYDS-II型帶電電纜識別儀性能指標

發射機：

1. 最大脈沖峰(feng)值輸出電流：20A

2．脈沖重復頻率(lv)：1次/2秒(miao)

3．電源(yuan)電壓：AC220V(±10%)

4．重量： 8kg

接收機：

1．接收機靈敏度： 40dB

2．電源：兩節5號電池(chi)

3．重量：0.2kg