工作原理簡介

 由于正在(zai)(zai)運行的(de)(de)(de)(de)帶電(dian)(dian)(dian)電(dian)(dian)(dian)纜(lan)不允許(xu)破壞任何(he)接地(di)線等(deng)連接線，也不允許(xu)將識別(bie)儀發射(she)機的(de)(de)(de)(de)輸(shu)出信(xin)號(hao)(hao)直接加(jia)在(zai)(zai)帶有(you)高壓(ya)電(dian)(dian)(dian)的(de)(de)(de)(de)電(dian)(dian)(dian)纜(lan)相線上(shang)。帶電(dian)(dian)(dian)電(dian)(dian)(dian)纜(lan)識別(bie)，需(xu)要解決兩個難題，一是電(dian)(dian)(dian)纜(lan)識別(bie)信(xin)號(hao)(hao)如何(he)耦合到電(dian)(dian)(dian)纜(lan)上(shang)的(de)(de)(de)(de)問題；二是耦合上(shang)去的(de)(de)(de)(de)信(xin)號(hao)(hao)一般比較小而運行電(dian)(dian)(dian)纜(lan)可(ke)能存(cun)在(zai)(zai)50HZ不平衡電(dian)(dian)(dian)流、感應的(de)(de)(de)(de)50Hz干擾(rao)電(dian)(dian)(dian)流，電(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)分布電(dian)(dian)(dian)容電(dian)(dian)(dian)流等(deng)構成(cheng)的(de)(de)(de)(de)50Hz工頻(pin)電(dian)(dian)(dian)磁干擾(rao)，高靈敏度接收卡鉗就存(cun)在(zai)(zai)如何(he)抗50Hz工頻(pin)干擾(rao)問題。

電纜識別儀智能型主機，發射(she)和接(jie)收采用單片機編碼、解碼技術和廣泛應(ying)用在(zai)通信(xin)(xin)(xin)(xin)領(ling)域里的(de)(de)PSK技術。在(zai)發射(she)卡(ka)(ka)鉗上發射(she)平均值(zhi)為0 的(de)(de)相位編碼信(xin)(xin)(xin)(xin)號(hao)，接(jie)收卡(ka)(ka)鉗中的(de)(de)單片機，對接(jie)收的(de)(de)信(xin)(xin)(xin)(xin)號(hao)經過硬件和如軟件的(de)(de)濾波(bo)后(hou)，再進行(xing)相位識別(bie)，當(dang)接(jie)收卡(ka)(ka)鉗按(an)照電(dian)(dian)(dian)(dian)流(liu)方(fang)向(xiang)卡(ka)(ka)電(dian)(dian)(dian)(dian)纜(lan)(lan)時(shi)，被(bei)(bei)識別(bie)的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)電(dian)(dian)(dian)(dian)流(liu)表右(you)偏，同時(shi)伴有聲(sheng)光指示(shi)。而其它的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)電(dian)(dian)(dian)(dian)流(liu)方(fang)向(xiang)與被(bei)(bei)識別(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)方(fang)向(xiang)相反，其電(dian)(dian)(dian)(dian)流(liu)表指針左偏。沒有聲(sheng)光指示(shi)。這(zhe)就體現了被(bei)(bei)識別(bie)的(de)(de)目(mu)標電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)*性(xing)。很容(rong)易將(jiang)被(bei)(bei)識別(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)從多根電(dian)(dian)(dian)(dian)纜(lan)(lan)中區(qu)別(bie)開來(lai)。又由于(yu)被(bei)(bei)識別(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)上的(de)(de)信(xin)(xin)(xin)(xin)號(hao)電(dian)(dian)(dian)(dian)流(liu)強(qiang)度全(quan)線都是一(yi)樣的(de)(de)，接(jie)收卡(ka)(ka)鉗在(zai)電(dian)(dian)(dian)(dian)纜(lan)(lan)沿線所接(jie)收到的(de)(de)電(dian)(dian)(dian)(dian)磁信(xin)(xin)(xin)(xin)號(hao)強(qiang)度*，從原理上講，識別(bie)的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)不受被(bei)(bei)識別(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)長度的(de)(de)限制。

性能優勢

電纜識別儀智能型主機采用*的PSK技(ji)(ji)術，產品性能優(you)于(yu)國內(nei)外同類產品；優(you)于(yu)GPS電纜(lan)(lan)識(shi)別技(ji)(ji)術，適應于(yu)遂道，地下電纜(lan)(lan)溝、有屏蔽及(ji)高壓(ya)建筑遮(zhe)擋和其他GPS無法使用的地方；測試(shi)距離不受電纜(lan)(lan)長度(du)限制，只要求接地電阻小于(yu)50歐姆(mu)，測試(shi)準確、可靠；重量輕(qing)，便于(yu)攜帶。

主要特點

 本儀(yi)器(qi)由(you)帶電電纜識別儀(yi)發射(she)(she)機、接收(shou)(shou)機、發射(she)(she)卡鉗(qian)、接收(shou)(shou)卡鉗(qian)組成(cheng)。

當電(dian)(dian)(dian)纜(lan)接地回(hui)路(lu)電(dian)(dian)(dian)阻50歐姆時，帶電(dian)(dian)(dian)電(dian)(dian)(dian)纜(lan)識(shi)別儀發射機驅動卡鉗在電(dian)(dian)(dian)纜(lan)上(shang)感應的(de)電(dian)(dian)(dian)流值不低于4毫安；大鉗口(kou)ф150適合各種截面積的(de)動力電(dian)(dian)(dian)纜(lan)。

接收(shou)機用1.5V兩節5號供電，配合(he)接受卡鉗，接收(shou)靈敏度(du)可達4毫安(an)。

性能指標

發射機：

1. zui大脈沖峰值輸出電流：20A

2．脈沖(chong)重復頻(pin)率：1次/2秒

3．供電電源：AC220V(-10%～+10%)，功率不大于100W

4．重(zhong)量：不大于12kg

接收機：

1．接收機靈敏(min)度：接地回路電阻小于50歐姆

2．電源：兩節5號(hao)電池

3．重(zhong)量：0.2kg