DDY-3000電纜故障定位儀

DDY-3000電纜故障定位儀是剛(gang)開(kai)發出的(de)新(xin)一代探測(ce)電纜故(gu)障(zhang)定位儀(yi)。采(cai)用(yong)了*的(de)DSP數字信號處理器、數字濾波，重點突出了抗噪聲功能、進一步提高檢測(ce)儀(yi)的(de)整機靈敏度(du)、聽音清晰度(du)及(ji)儀(yi)器自(zi)動判(pan)斷能力(li)，儀(yi)器性能穩定、質(zhi)量可靠、全(quan)中(zhong)文菜單操作簡便。采(cai)用(yong)技術、自(zi)主知識產權(quan)是目前*的(de)電纜故(gu)障(zhang)定位儀(yi)。

電力電纜故障測試中粗測距離是很(hen)容(rong)易的。如果用電纜故障測試儀主機(ji)來(lai)粗(cu)測(ce)的(de)(de)(de)話，一(yi)(yi)般(ban)只要數分(fen)鐘(zhong)便可測(ce)出(chu)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)點(dian)(dian)至測(ce)試(shi)端(duan)的(de)(de)(de)粗(cu)略距離，而且(qie)粗(cu)測(ce)誤(wu)差一(yi)(yi)般(ban)不會超過(guo)幾(ji)十(shi)米。因此，電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)粗(cu)測(ce)距離已不是電(dian)(dian)(dian)纜(lan)尋(xun)測(ce)故障(zhang)(zhang)(zhang)的(de)(de)(de)主要矛盾。大(da)量(liang)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)測(ce)試(shi)實踐證(zheng)明：電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)定(ding)點(dian)(dian)方面(mian)的(de)(de)(de)問題已成為快速尋(xun)測(ce)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)的(de)(de)(de)主要矛盾。即具(ju)體電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)定(ding)點(dian)(dian)則(ze)是電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)測(ce)試(shi)中的(de)(de)(de)zui為關鍵(jian)的(de)(de)(de)一(yi)(yi)步(bu)，現在越來(lai)越多的(de)(de)(de)使用交聯電(dian)(dian)(dian)纜(lan)，而交聯電(dian)(dian)(dian)纜(lan)的(de)(de)(de)電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)大(da)部分(fen)為封閉(bi)故障(zhang)(zhang)(zhang)，電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)點(dian)(dian)的(de)(de)(de)放(fang)電(dian)(dian)(dian)聲往(wang)(wang)(wang)往(wang)(wang)(wang)在十(shi)幾(ji)米甚至幾(ji)十(shi)米都有(you)幾(ji)乎(hu)一(yi)(yi)樣大(da)的(de)(de)(de)響聲，這(zhe)給(gei)電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)定(ding)點(dian)(dian)帶來(lai)了很大(da)的(de)(de)(de)困難，另外在實際電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)定(ding)點(dian)(dian)中，由(you)于測(ce)試(shi)人(ren)遠(yuan)離測(ce)試(shi)端(duan)，當尚未聽(ting)到(dao)由(you)電(dian)(dian)(dian)纜(lan)故障(zhang)(zhang)(zhang)點(dian)(dian)傳出(chu)的(de)(de)(de)地(di)震波時，心情往(wang)(wang)(wang)往(wang)(wang)(wang)會急燥起(qi)來(lai)，甚至會懷疑高壓放(fang)電(dian)(dian)(dian)設備沒有(you)工作。有(you)時在有(you)脈沖聲源的(de)(de)(de)干擾背景中往(wang)(wang)(wang)往(wang)(wang)(wang)需(xu)要知道(dao)自己聽(ting)到(dao)的(de)(de)(de)聲波是否與放(fang)電(dian)(dian)(dian)設備的(de)(de)(de)放(fang)電(dian)(dian)(dian)周期同步(bu)，否則(ze)就(jiu)無法作出(chu)zui后的(de)(de)(de)判斷。

采用本公司(si)所*的(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)定(ding)(ding)(ding)點(dian)新理論。是本公司(si)根據(ju)研究成果而開發的(de)具(ju)有高(gao)抗(kang)干擾性(xing)，高(gao)靈敏度，新型的(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)定(ding)(ding)(ding)點(dian)測試(shi)(shi)儀(yi)(yi)(yi)器(qi)。DDY-3000電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)定(ding)(ding)(ding)點(dian)儀(yi)(yi)(yi)器(qi)采用*的(de)模(mo)擬(ni)低(di)噪聲設計和高(gao)性(xing)能濾波電(dian)(dian)(dian)路相結(jie)合，使DDY-3000電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)定(ding)(ding)(ding)點(dian)儀(yi)(yi)(yi)抗(kang)干擾性(xing)能有了極(ji)大的(de)提(ti)高(gao)，采用*設計和*地裝配(pei)工(gong)藝(yi)使DDY-3000電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)定(ding)(ding)(ding)點(dian)儀(yi)(yi)(yi)具(ju)有目前高(gao)水準。對各類電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)可地進行定(ding)(ding)(ding)點(dian)，特別是對交聯電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)和電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)封閉(bi)性(xing)電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)具(ju)有獨到(dao)的(de)測試(shi)(shi)效(xiao)果。是電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障(zhang)測試(shi)(shi)儀(yi)(yi)(yi)器(qi)中的(de)更新換代產品(pin)。
性能(neng)介紹:故(gu)障點放電(dian)時會產(chan)生(sheng)聲(sheng)(sheng)波和電(dian)磁波，聲(sheng)(sheng)波和電(dian)磁波之間又有一(yi)定的內(nei)在，利用(yong)好它們之間的表象及，可使(shi)我們準、快、易找到故(gu)障點。 

一、電(dian)磁波

本電(dian)纜故障定點(dian)儀可以(yi)接收電(dian)纜故障點(dian)放(fang)電(dian)產生的電(dian)磁波，并經數字(zi)處理、放(fang)大通過液晶以(yi)光柱及數字(zi)方式連(lian)續顯示。
電纜(lan)故(gu)障(zhang)預定位(wei)：沿(yan)地下(xia)電纜(lan)走(zou)向邊(bian)走(zou)邊(bian)觀察，信號突然減小的地方就可(ke)能是(shi)故(gu)障(zhang)的大致位(wei)置(zhi)（一定區域(yu)內）。由于此(ci)項功能加入(ru)使得(de)故(gu)障(zhang)的探測變的簡單而迅(xun)速。
尋電(dian)纜(lan)(lan)路徑：沿地下電(dian)纜(lan)(lan)Z字型行走，信號zui大(da)處為電(dian)纜(lan)(lan)正上方，電(dian)纜(lan)(lan)兩邊信號減小(xiao)。由此(ci)可(ke)判斷電(dian)纜(lan)(lan)的(de)大(da)致路徑。

二(er)、聲波

電(dian)(dian)纜(lan)故障(zhang)點放(fang)(fang)電(dian)(dian)的聲波強度以往都是通過耳(er)機傳(chuan)到耳(er)朵中并通過耳(er)朵來(lai)判(pan)斷(duan)聲音的大(da)小，而耳(er)朵的分辨(bian)率不(bu)會很(hen)高，特別是現在的交聯電(dian)(dian)纜(lan)放(fang)(fang)電(dian)(dian)聲在一定范圍內幾乎一樣(yang)大(da)小用(yong)耳(er)朵是不(bu)容易區分的，而DDY-3000電(dian)(dian)纜(lan)故障(zhang)定點儀可(ke)以時(shi)時(shi)記錄放(fang)(fang)電(dian)(dian)聲波的大(da)小，通過儀器來(lai)判(pan)斷(duan)大(da)小，極大(da)得(de)提(ti)高了可(ke)靠(kao)性(xing)和(he)準(zhun)確(que)性(xing)。
本電(dian)纜(lan)(lan)故障定(ding)點(dian)儀(yi)高(gao)增(zeng)益(yi)的放大(da)倍(bei)數（90Db）是(shi)保證電(dian)纜(lan)(lan)故障測試準確性的又(you)一(yi)關鍵因素，測過(guo)電(dian)纜(lan)(lan)故障的人(ren)都知道碰到電(dian)纜(lan)(lan)封閉(bi)故障時我們往往會束手無(wu)策，這是(shi)因為電(dian)纜(lan)(lan)故障定(ding)點(dian)儀(yi)的放大(da)倍(bei)數不(bu)夠（過(guo)去濾波(bo)技術不(bu)高(gao)，所以(yi)不(bu)敢將定(ding)點(dian)儀(yi)過(guo)高(gao)的放大(da)）。DDY-3000電(dian)纜(lan)(lan)故障定(ding)點(dian)儀(yi)極(ji)大(da)提高(gao)了放大(da)倍(bei)數，并有(you)(you)很好(hao)的濾波(bo)效果，濾波(bo)器的寬帶選(xuan)擇(ze)可以(yi)有(you)(you)效排(pai)除環(huan)境噪聲的干擾（如風聲、車輛聲等）。解決了過(guo)去無(wu)法解決的難題(ti)。


三、電磁(ci)波與聲波

電(dian)纜(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)點的(de)放電(dian)除產生聲(sheng)音(yin)信號(hao)(hao)外，同時(shi)也發出(chu)沿電(dian)纜(lan)(lan)(lan)擴散(san)的(de)電(dian)磁(ci)(ci)波(bo)(bo)。可以同步接收并(bing)(bing)顯示(shi)聲(sheng)波(bo)(bo)及電(dian)磁(ci)(ci)波(bo)(bo)，并(bing)(bing)可測出(chu)聲(sheng)波(bo)(bo)和(he)電(dian)磁(ci)(ci)波(bo)(bo)信號(hao)(hao)的(de)時(shi)間(jian)差并(bing)(bing)以此推算(suan)出(chu)拾(shi)音(yin)器到故(gu)(gu)障(zhang)(zhang)點的(de)距離。對于穿管電(dian)纜(lan)(lan)(lan)及封(feng)閉(bi)性電(dian)纜(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)定(ding)位有很好的(de)效果。此種方法的(de)優點是，電(dian)纜(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)的(de)定(ding)位與信號(hao)(hao)的(de)強度無關。



技術參數