工作原理簡介
帶電電纜識別儀的(de)(de)發射機(ji)(ji)和接(jie)收(shou)機(ji)(ji)采用單(dan)片機(ji)(ji)編(bian)碼、解碼技術和廣泛(fan)應用在(zai)(zai)通信領(ling)域里的(de)(de)PSK技術。在(zai)(zai)發射卡(ka)鉗(qian)(qian)(qian)上發射平均值為0 的(de)(de)相(xiang)位編(bian)碼信號，接(jie)收(shou)機(ji)(ji)中(zhong)的(de)(de)單(dan)片機(ji)(ji)對接(jie)收(shou)的(de)(de)信號經(jing)過硬件(jian)和軟件(jian)的(de)(de)濾波(bo)后，再(zai)進行相(xiang)位識(shi)別(bie)(bie)。將(jiang)發射卡(ka)鉗(qian)(qian)(qian)和接(jie)收(shou)卡(ka)鉗(qian)(qian)(qian)的(de)(de)箭頭指向電(dian)(dian)(dian)纜(lan)(lan)(lan)終端，當接(jie)收(shou)機(ji)(ji)卡(ka)鉗(qian)(qian)(qian)鉗(qian)(qian)(qian)住某根(gen)(gen)電(dian)(dian)(dian)纜(lan)(lan)(lan)，接(jie)收(shou)機(ji)(ji)電(dian)(dian)(dian)流(liu)表右偏，同時(shi)伴(ban)有聲(sheng)光指示。而(er)鉗(qian)(qian)(qian)住其它(ta)的(de)(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)，電(dian)(dian)(dian)流(liu)表左偏，電(dian)(dian)(dian)流(liu)方(fang)向與被識(shi)別(bie)(bie)電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)電(dian)(dian)(dian)流(liu)方(fang)向相(xiang)反，沒有聲(sheng)光指示。這就體現了被識(shi)別(bie)(bie)的(de)(de)目標電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)特性。很容易將(jiang)被識(shi)別(bie)(bie)電(dian)(dian)(dian)纜(lan)(lan)(lan)從多根(gen)(gen)電(dian)(dian)(dian)纜(lan)(lan)(lan)中(zhong)做出明確判別(bie)(bie)。又由于被識(shi)別(bie)(bie)電(dian)(dian)(dian)纜(lan)(lan)(lan)上的(de)(de)信號電(dian)(dian)(dian)流(liu)強(qiang)度(du)全線(xian)都是一(yi)樣的(de)(de)，接(jie)收(shou)卡(ka)鉗(qian)(qian)(qian)在(zai)(zai)電(dian)(dian)(dian)纜(lan)(lan)(lan)沿(yan)線(xian)所接(jie)收(shou)到(dao)的(de)(de)電(dian)(dian)(dian)磁信號強(qiang)度(du)一(yi)致，識(shi)別(bie)(bie)的(de)(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)不(bu)受被識(shi)別(bie)(bie)電(dian)(dian)(dian)纜(lan)(lan)(lan)長度(du)的(de)(de)限(xian)制。

電(dian)纜識別儀(yi)在電(dian)力電(dian)纜架(jia)設、遷移、維護以(yi)及(ji)故障處理(li)中(zhong)用(yong)(yong)來判(pan)別一束電(dian)纜中(zhong)欲(yu)尋找的(de)一根(gen)特定(ding)的(de)電(dian)纜；具(ju)有判(pan)別電(dian)纜準(zhun)確、快速、操(cao)作簡單、應(ying)用(yong)(yong)范(fan)圍(wei)廣等特點(dian)。它是電(dian)纜施工及(ji)維護工作中(zhong)*的(de)檢測儀(yi)器。

LYDS-II型帶電電纜識別儀主要特點

本儀器(qi)由(you)電(dian)(dian)(dian)纜(lan)識(shi)(shi)別(bie)(bie)發射(she)機，電(dian)(dian)(dian)纜(lan)識(shi)(shi)別(bie)(bie)接(jie)(jie)收(shou)機、發射(she)卡鉗和(he)接(jie)(jie)收(shou)卡鉗及輸出信號(hao)連接(jie)(jie)線組成(cheng)。它具(ju)有(you)大功率電(dian)(dian)(dian)流脈沖(chong)輸出；現(xian)場接(jie)(jie)收(shou)信號(hao)特征清晰(xi)，輕便靈(ling)活，靈(ling)敏度(du)高(gao)，能有(you)效(xiao)抑制現(xian)場工頻干(gan)擾(rao)；判(pan)斷(duan)準確、快(kuai)速；保護電(dian)(dian)(dian)路(lu)可靠，不怕輸出短路(lu)；大鉗口ф125適合(he)各(ge)(ge)種截面積的動力電(dian)(dian)(dian)纜(lan)；內部具(ju)有(you)大功率隔離(li)變壓器(qi)，操作者(zhe)與市電(dian)(dian)(dian)不存(cun)在任何電(dian)(dian)(dian)氣上(shang)的直接(jie)(jie)接(jie)(jie)觸。極大的保證(zheng)了(le)人身安(an)全。帶電(dian)(dian)(dian)電(dian)(dian)(dian)纜(lan)識(shi)(shi)別(bie)(bie)時(shi)不需要斷(duan)開各(ge)(ge)電(dian)(dian)(dian)纜(lan)兩端與變配電(dian)(dian)(dian)設備間的連接(jie)(jie)，可在電(dian)(dian)(dian)纜(lan)處(chu)于(yu)帶電(dian)(dian)(dian)的狀態下進行在線識(shi)(shi)別(bie)(bie)，提高(gao)了(le)識(shi)(shi)別(bie)(bie)的效(xiao)率，大大減少了(le)由(you)于(yu)停(ting)電(dian)(dian)(dian)所(suo)造成(cheng)的直接(jie)(jie)和(he)間接(jie)(jie)的經濟損失(shi)。

本儀器的最大特點是：

1、將帶(dai)電識(shi)別(bie)和不(bu)帶(dai)電識(shi)別(bie)功能合二為(wei)一，不(bu)僅適合停運(yun)電纜的(de)識(shi)別(bie)與判斷，而且也適合帶(dai)點電纜的(de)識(shi)別(bie)與判斷，操作極其簡單(dan)，使用非常方便(bian)。

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(chong)峰值輸出(chu)電流：20A

2．脈沖重復頻率：1次/2秒

3．電(dian)源電(dian)壓(ya)：AC220V(±10%)

4．重量： 8kg

接收機：

1．接(jie)收機靈敏度： 40dB

2．電(dian)源(yuan)：兩節5號電(dian)池

3．重量：0.2kg