工作原理簡介

 由于(yu)正(zheng)在(zai)運行的帶(dai)(dai)電(dian)(dian)(dian)電(dian)(dian)(dian)纜(lan)不允(yun)許破壞任(ren)何(he)(he)接(jie)地(di)線等(deng)連接(jie)線，也(ye)不允(yun)許將識(shi)別(bie)儀發射(she)機(ji)的輸出信號直接(jie)加在(zai)帶(dai)(dai)有高壓電(dian)(dian)(dian)的電(dian)(dian)(dian)纜(lan)相(xiang)線上。帶(dai)(dai)電(dian)(dian)(dian)電(dian)(dian)(dian)纜(lan)識(shi)別(bie)，需要(yao)解決兩個(ge)難題(ti)，一是(shi)電(dian)(dian)(dian)纜(lan)識(shi)別(bie)信號如何(he)(he)耦合到電(dian)(dian)(dian)纜(lan)上的問(wen)題(ti)；二(er)是(shi)耦合上去的信號一般比較小(xiao)而運行電(dian)(dian)(dian)纜(lan)可能存在(zai)50HZ不平(ping)衡電(dian)(dian)(dian)流、感應的50Hz干(gan)擾(rao)電(dian)(dian)(dian)流，電(dian)(dian)(dian)纜(lan)的分布電(dian)(dian)(dian)容電(dian)(dian)(dian)流等(deng)構成的50Hz工頻電(dian)(dian)(dian)磁(ci)干(gan)擾(rao)，高靈敏度接(jie)收卡(ka)鉗就存在(zai)如何(he)(he)抗50Hz工頻干(gan)擾(rao)問(wen)題(ti)。

電纜識別儀智能型主機，發射和(he)接(jie)收(shou)采用單(dan)片機(ji)編碼、解(jie)碼技(ji)術和(he)廣(guang)泛應用在(zai)通信(xin)(xin)領域里(li)的(de)(de)(de)(de)(de)PSK技(ji)術。在(zai)發射卡(ka)鉗上發射平均值為0 的(de)(de)(de)(de)(de)相(xiang)位(wei)(wei)編碼信(xin)(xin)號(hao)(hao)，接(jie)收(shou)卡(ka)鉗中的(de)(de)(de)(de)(de)單(dan)片機(ji)，對接(jie)收(shou)的(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)經過硬件和(he)如(ru)軟(ruan)件的(de)(de)(de)(de)(de)濾波后，再進行相(xiang)位(wei)(wei)識(shi)別(bie)(bie)(bie)，當接(jie)收(shou)卡(ka)鉗按(an)照電(dian)(dian)(dian)(dian)流方(fang)(fang)向卡(ka)電(dian)(dian)(dian)(dian)纜(lan)(lan)時(shi)，被(bei)(bei)識(shi)別(bie)(bie)(bie)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)電(dian)(dian)(dian)(dian)流表右偏(pian)，同時(shi)伴有(you)聲光指示。而其它的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)電(dian)(dian)(dian)(dian)流方(fang)(fang)向與(yu)被(bei)(bei)識(shi)別(bie)(bie)(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流方(fang)(fang)向相(xiang)反，其電(dian)(dian)(dian)(dian)流表指針(zhen)左(zuo)偏(pian)。沒有(you)聲光指示。這就體現了被(bei)(bei)識(shi)別(bie)(bie)(bie)的(de)(de)(de)(de)(de)目標電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)(de)(de)*性。很(hen)容易將被(bei)(bei)識(shi)別(bie)(bie)(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)從(cong)多根電(dian)(dian)(dian)(dian)纜(lan)(lan)中區別(bie)(bie)(bie)開來。又(you)由于被(bei)(bei)識(shi)別(bie)(bie)(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)上的(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)電(dian)(dian)(dian)(dian)流強度全(quan)線都是一樣的(de)(de)(de)(de)(de)，接(jie)收(shou)卡(ka)鉗在(zai)電(dian)(dian)(dian)(dian)纜(lan)(lan)沿線所接(jie)收(shou)到的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)磁信(xin)(xin)號(hao)(hao)強度*，從(cong)原理(li)上講，識(shi)別(bie)(bie)(bie)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)不受被(bei)(bei)識(shi)別(bie)(bie)(bie)電(dian)(dian)(dian)(dian)纜(lan)(lan)長度的(de)(de)(de)(de)(de)限制。

性能優勢

電纜識別儀智能型主機采用*的(de)PSK技術，產品性能優于(yu)國內外同(tong)類(lei)產品；優于(yu)GPS電(dian)纜(lan)識別技術，適應于(yu)遂道，地(di)下電(dian)纜(lan)溝、有屏蔽及高壓建筑遮擋和(he)其(qi)他GPS無法使用的(de)地(di)方；測試(shi)(shi)距離不(bu)受電(dian)纜(lan)長(chang)度限制，只要求接(jie)地(di)電(dian)阻小于(yu)50歐姆，測試(shi)(shi)準確、可靠；重(zhong)量輕，便于(yu)攜帶。

主要特點

 本儀器由(you)帶電電纜識別儀發射(she)機、接(jie)收機、發射(she)卡(ka)鉗、接(jie)收卡(ka)鉗組成。

當電纜接地回路電阻50歐姆時，帶電電纜識別儀發(fa)射機驅動(dong)卡鉗(qian)在電纜上(shang)感應的(de)電流(liu)值不低于4毫安；大鉗(qian)口(kou)ф150適合(he)各(ge)種截面(mian)積的(de)動(dong)力電纜。

接(jie)收機用1.5V兩節5號供電，配合接(jie)受卡鉗(qian)，接(jie)收靈敏度可達4毫安(an)。

性能指標

發射機：

1. zui大(da)脈沖(chong)峰值輸出電流：20A

2．脈沖重復頻(pin)率(lv)：1次/2秒

3．供(gong)電(dian)電(dian)源(yuan)：AC220V(-10%～+10%)，功(gong)率不大于100W

4．重量(liang)：不大于12kg

接收機：

1．接收機(ji)靈敏度：接地回(hui)路電阻小于50歐姆

2．電源(yuan)：兩(liang)節(jie)5號電池

3．重量：0.2kg