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id="1571n5fppxr7" class="nr_main_box"> <h1 class="inside_rnewtil">管線探測(cè)儀感應(yīng)搜索方法</h1> <div id="1571n5fppxr7" class="inside_rnewtime">點(diǎn)擊次數(shù)：948 更新時(shí)間：2022-10-29</div> <div id="1571n5fppxr7" class="inside_rnewcon"><p><strong>管線探測(cè)儀感應(yīng)搜索方法</strong><br/></p><p><br/></p><p style="text-indent: 28px"><span style="font-size: 16px; font-family: 宋體;">在一個(gè)區(qū)域內(nèi)有很多未知管線，在開(kāi)挖之前要探明這些管線的位置，以免在開(kāi)挖過(guò)程中損壞這些管線。感應(yīng)搜索是探測(cè)未知管線的可靠</span>技術(shù)。這種搜索方法需要發(fā)射機(jī)和接收機(jī)并有兩個(gè)操作員。這種搜索方法被稱(chēng)為“兩人搜索"。在開(kāi)始搜索之前，確定要搜索的區(qū)域和管線通過(guò)該區(qū)域可能的方向。打開(kāi)發(fā)射機(jī)，并把發(fā)射頻率設(shè)定為射頻。第一個(gè)人操作發(fā)射機(jī)，第二個(gè)人操作接收機(jī)。當(dāng)發(fā)射機(jī)經(jīng)過(guò)管線時(shí)將會(huì)有信號(hào)施加到地下管線上，然后在發(fā)射機(jī)上游或下游<span style=";font-family:'Times New Roman';font-size:16px">20</span><span style="font-size: 16px; font-family: 宋體;">米遠(yuǎn)的接收機(jī)就可以探測(cè)到該信號(hào)。發(fā)射機(jī)的方向與估計(jì)的管線的方向保持一致。第二個(gè)人提著接收機(jī)在要搜索的區(qū)域的起始位置，接收機(jī)的天線的方向保持與可能的地下管線的方向垂直。將接收機(jī)調(diào)到不會(huì)接收到直接從空中傳播過(guò)來(lái)的發(fā)射機(jī)信號(hào)的最高的靈敏度。當(dāng)發(fā)射機(jī)與接收機(jī)的方向保持正確之后，兩個(gè)操作人員平行地向前移動(dòng)。提著接收機(jī)的操作人員在向前走動(dòng)的過(guò)程中，前后移動(dòng)接收機(jī)。發(fā)射機(jī)將信號(hào)施加到正下方的管線，再由接收機(jī)探測(cè)到該信號(hào)。在接收機(jī)探測(cè)到的峰值的位置在地面上做好標(biāo)志。在其它可能有管線穿過(guò)的方向重復(fù)搜索。</span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體"></span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img68.chem17.com/9/20221029/638026305026282040212.png" title="VU[AU(INYLJ7[)2FZSHCRSP.png" alt="VU[AU(INYLJ7[)2FZSHCRSP.png"/></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體"></span></span><br/></p><p><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">保持與發(fā)射機(jī)之間的距離在感應(yīng)模式下，發(fā)射機(jī)除了給目標(biāo)管線發(fā)射信號(hào)，還會(huì)向空氣中發(fā)射信號(hào)，這可能會(huì)給在發(fā)射機(jī)附近的探測(cè)工作造成干擾。要檢查接收機(jī)探測(cè)到的是管線的信號(hào)，而不是直接從發(fā)射機(jī)發(fā)射出來(lái)的信號(hào)，移動(dòng)發(fā)射機(jī)一兩米，如果管線也隨之移動(dòng)的話(huà)，這表明接收機(jī)離發(fā)射機(jī)的距離太近。另一種檢查接收機(jī)是否接收到發(fā)射機(jī)信號(hào)的方法是把接收機(jī)指向發(fā)射機(jī)，如果接收機(jī)的響應(yīng)大小不變或增加，說(shuō)明接收機(jī)接收到的是直接從空中傳播過(guò)來(lái)的發(fā)射機(jī)信號(hào)。在這種情況下降低發(fā)射機(jī)輸出功率并降低接收機(jī)的靈敏度。接收機(jī)可能還要離開(kāi)發(fā)射機(jī)</span></span><span style=";font-family:'Times New Roman';font-size:16px">25</span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">至</span></span><span style=";font-family:'Times New Roman';font-size:16px">30</span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">米。不要把發(fā)射機(jī)放在井蓋上，因?yàn)檫@樣會(huì)阻止信號(hào)到達(dá)管線。從目標(biāo)管線感應(yīng)到相鄰管線的不需要的感應(yīng)信號(hào)是管線探測(cè)中最常見(jiàn)的問(wèn)題。這可能會(huì)導(dǎo)致目標(biāo)管線的位置或深度測(cè)量不準(zhǔn)確或探測(cè)到錯(cuò)誤的管線。在許多情況下一定程度的感應(yīng)是不可避免的，但有經(jīng)驗(yàn)的操作人員可以用一些方法減小感應(yīng)的程度，從而提高探測(cè)的可靠性。盡量避免使用感應(yīng)法施加信號(hào)。信號(hào)可能感應(yīng)到下方的的多根管線上?？赡艿脑?huà)盡量使用耦合夾鉗。</span></span><span style=";font-family:'Times New Roman';font-size:16px"> </span></p><p><span style=";font-family:宋體;font-size:16px"> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img61.chem17.com/9/20221029/638026305638658052140.png" title=")]9XWAFBN[ZJR`[2SME[4RQ.png" alt=")]9XWAFBN[ZJR`[2SME[4RQ.png"/></p><p><span style=";font-family:宋體;font-size:16px"></span><br/></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體">二、<strong style="white-space: normal;">管線探測(cè)儀</strong><strong style="white-space: normal;"> </strong>信號(hào)施加點(diǎn)的選擇</span></span></strong><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">確定不要在管線交叉相混處施加信號(hào)。</span></span></p><p><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">而應(yīng)從單一管線處或閥門(mén)處（直連）施加信號(hào)。例如：自來(lái)水管和煤氣管在建筑物內(nèi)混在一起，從路上的閥門(mén)或其它的接入點(diǎn)施加信號(hào)，而不是在建筑物內(nèi)施加信號(hào)。</span></span><span style=";font-family:'Times New Roman';font-size:16px"> </span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">可能的話(huà)使用較低的信號(hào)頻率以減少對(duì)平行管線的感應(yīng)。</span></span><span style=";font-family:'Times New Roman';font-size:16px"> </span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">信號(hào)通過(guò)另一根管線返回到發(fā)射機(jī)，可能的話(huà)使用</span></span><span style="text-decoration:underline;"><span style="font-family: 宋體;font-size: 16px"><span style="font-family:宋體">雙端連接法</span></span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">繞過(guò)接地回路。</span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img68.chem17.com/9/20221029/638026305986938938433.png" title="$~0ESVY7Z%PCW94SSOMV8%J.png" alt="$~0ESVY7Z%PCW94SSOMV8%J.png"/></p><p style="text-indent: 32px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">選擇信號(hào)施加點(diǎn)，信號(hào)施加點(diǎn)應(yīng)盡量遠(yuǎn)離其它管線，而不是在管線密集的區(qū)域。</span></span><span style=";font-family:'Times New Roman';font-size:16px"> </span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">當(dāng)使用單端連接施加信號(hào)時(shí)，接地點(diǎn)應(yīng)盡量遠(yuǎn)離目標(biāo)管線，并遠(yuǎn)離其它地下管線。</span></span><span style=";font-family:'Times New Roman';font-size:16px"> </span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">不要使用現(xiàn)存的地下結(jié)構(gòu)作為接地，可能會(huì)有其它管線與其相連。如果不需要長(zhǎng)距離的追蹤，僅僅將地線與管線垂直放在地面上，可能會(huì)比良好的接地造成更少的非目標(biāo)管線的相互感應(yīng)。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">井蓋作為接地</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">在探測(cè)的過(guò)程中，有時(shí)候無(wú)法將接地棒插入地下，例如：在硬地面（如：公路）上探測(cè)管線。在這種情況下可以把地線連接到人井的金屬邊框上作為接地回路。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">使用路燈柱</span></span> </p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">直接連接到金屬的路燈柱幾乎與直接連接電纜護(hù)層具有相同的效果。通常電纜的護(hù)層與金屬燈柱是連通的，所以簡(jiǎn)單地連接到路燈柱，操作人員就可以安全地、迅速地探測(cè)路燈電纜，而不需要找來(lái)路燈公司的技術(shù)人員。</span></span></p><p><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">如果路燈柱是混凝土的，將發(fā)射機(jī)連接到電纜的護(hù)層。連接電纜護(hù)層施加發(fā)射機(jī)信號(hào)到很遠(yuǎn)的距離，使接收機(jī)可以追蹤到路燈和其它街道設(shè)施提供照明的電纜。</span></span></p><p><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體"> </span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img65.chem17.com/9/20221029/638026306899302324498.png" title="X[BSITC{I4OI~)(SX7[F_(2.png" alt="X[BSITC{I4OI~)(SX7[F_(2.png"/></p><p><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體"></span></span><br/></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體">三、相鄰導(dǎo)體</span></span></strong><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">當(dāng)信號(hào)強(qiáng)度在導(dǎo)體的一側(cè)比另一測(cè)下降若許多時(shí)，接收機(jī)可能接收到相鄰或平行導(dǎo)體的干擾信號(hào)。大多數(shù)情況下，信號(hào)強(qiáng)的導(dǎo)體是目標(biāo)導(dǎo)體。確定相鄰導(dǎo)體的精確位置，然后調(diào)整地線位置，使地線不跨越任何相鄰導(dǎo)體，盡量遠(yuǎn)離目標(biāo)導(dǎo)體且于目標(biāo)導(dǎo)體垂直（見(jiàn)右圖）。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">尋找探測(cè)區(qū)內(nèi)其它公用管線的標(biāo)記，例如變壓器、消防栓、柱腳、儀表等，這些設(shè)備有可能連接地下導(dǎo)體。</span></span></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體">四、<strong style="white-space: normal;">管線探測(cè)儀</strong><strong style="white-space: normal;"> </strong>管道的測(cè)試</span></span></strong><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">接收機(jī)收到的信號(hào)隨距發(fā)射機(jī)耦合點(diǎn)的距離增加而變?nèi)?，長(zhǎng)金屬管尤其明顯（這是因?yàn)榻饘俟懿粩嘤薪拥攸c(diǎn)并產(chǎn)生泄漏引起的）。為增強(qiáng)信號(hào)，移動(dòng)發(fā)射機(jī)的耦合點(diǎn)，使其靠近接收機(jī)并不斷調(diào)整接收機(jī)的增益。如果必須使用感應(yīng)法，最好由兩人操作，一人提發(fā)射機(jī)另一人提接收機(jī)，這樣工作會(huì)很方便。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">管道也許有許多分支，一般我們先測(cè)試主管道，測(cè)完主管道后，再定位各支管道。用感應(yīng)法很容易定位各個(gè)支管。此項(xiàng)操作需兩位操作人員，操作者</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">手持接收機(jī)站在主管道上，接收機(jī)與主管道垂直。操作者</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">手提發(fā)射機(jī)，發(fā)射機(jī)標(biāo)識(shí)箭頭與主管道平行，且保持與發(fā)射機(jī)相距</span><span style="font-family:Times New Roman">15</span><span style="font-family:宋體">米以上，如圖所示，在準(zhǔn)備探測(cè)供給分支一側(cè)距主管道</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋體">米左右的平行管線上移動(dòng)。當(dāng)操作者</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">每通過(guò)一根分支時(shí)，接收機(jī)信號(hào)強(qiáng)度增加。每當(dāng)接收機(jī)信號(hào)強(qiáng)度增加時(shí)，操作者</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">向著操作者</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">發(fā)信號(hào)，然后操作者</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">在地面上做出標(biāo)記即可。此項(xiàng)操作接收機(jī)應(yīng)選波峰法</span></span></p><p style="text-indent: 28px"><img src="https://img69.chem17.com/9/20221029/638026308058510326370.png" title="~{3X{USLCFW$`)2T7XAEQ[3.png" alt="~{3X{USLCFW$`)2T7XAEQ[3.png" style="text-align: center; max-width: 800px; max-height: 300%;"/></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體"><strong style="white-space: normal;">管線探測(cè)儀 </strong>彎管和管端的定位</span></span></strong><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">在跟蹤管線時(shí)，可能碰到信號(hào)強(qiáng)度突然下降，當(dāng)接收機(jī)左右移動(dòng)時(shí)，讀數(shù)信號(hào)沒(méi)有明顯變化。原地繼續(xù)左右搜索，同時(shí)轉(zhuǎn)動(dòng)身體。如果轉(zhuǎn)到某一位置時(shí)信號(hào)恢復(fù)，則表示管線轉(zhuǎn)彎，可沿新的方向繼續(xù)跟蹤。如果轉(zhuǎn)過(guò)一圈沒(méi)有測(cè)得明顯的信號(hào)強(qiáng)度，則表明到達(dá)管線的盡頭。</span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img68.chem17.com/9/20221029/638026309068594365672.png" title="C@H~}_GO_(PTQPXCJP_0)IE.png" alt="C@H~}_GO_(PTQPXCJP_0)IE.png"/></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體"><strong style="white-space: normal;">管線探測(cè)儀</strong></span></span></strong><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體"><strong style="white-space: normal;"> </strong>確認(rèn)地下存在多根管線的方法</span></span></strong><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">如果地下存在多根導(dǎo)體，我們用感應(yīng)法測(cè)試時(shí)發(fā)射機(jī)可能感應(yīng)到最淺的或?qū)щ娦院霉芫€上，在這種情況下用直讀法測(cè)量時(shí)，可能測(cè)得深度不可信。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">此時(shí)我們用</span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:Times New Roman">45</span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">°</span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">法測(cè)試可以進(jìn)一步確定多個(gè)導(dǎo)體的存在，并可測(cè)得多個(gè)管線的深度。首先我們可以用</span><span style="font-family:Times New Roman">45</span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">°</span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">法測(cè)到第一個(gè)管線的深度，然后繼續(xù)移動(dòng)接收機(jī)找出多個(gè)管線的深度。將接收機(jī)移到另外一側(cè)重復(fù)上述過(guò)程，分別測(cè)出各個(gè)管線的深度</span></span><strong><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">。</span></span></strong><strong></strong></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img65.chem17.com/9/20221029/638026309588537970627.png" title="LF7OCH}2CJDU7N`)TCN~%30.png" alt="LF7OCH}2CJDU7N`)TCN~%30.png"/></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體"><strong style="white-space: normal;">管線探測(cè)儀 </strong>埋設(shè)比較深的導(dǎo)體</span></span></strong><strong></strong></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">當(dāng)管道埋設(shè)比較深時(shí)用感應(yīng)法測(cè)試就會(huì)感到很困難，并可能感覺(jué)到接收機(jī)信號(hào)很弱，移動(dòng)接收機(jī)時(shí)，信號(hào)強(qiáng)度變化很小，增加增益后信號(hào)很不穩(wěn)定。這是由于管道比較深發(fā)射機(jī)感應(yīng)到管道的信號(hào)比較弱，而接收機(jī)從管道接收的信號(hào)會(huì)更弱造成的。</span></span></p><p><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">如果目標(biāo)管線埋在</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">米以下，用感應(yīng)法測(cè)試就會(huì)產(chǎn)生很大誤差。此時(shí)最好用直連法</span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img63.chem17.com/9/20221029/638026310157010049694.png" title="IEBQFCFIFKB1QW3IZ7HVCGH.png" alt="IEBQFCFIFKB1QW3IZ7HVCGH.png"/></p><p style="margin-right:2px;text-indent:0;line-height:27px"><strong><span style=";font-family:宋體;font-size:19px"><span style="font-family:宋體"><strong style="white-space: normal;">管線探測(cè)儀 </strong>電流測(cè)試</span></span></strong><strong></strong></p><p style="margin-bottom:6px;text-indent:27px;line-height:114%"><span style="position:absolute;z-index:1;margin-top:310.6667px;width:666.0000px;height:318.0000px"><br/></span><span style="position:absolute;z-index:1;margin-top:310.6667px;width:666.0000px;height:318.0000px"><br/></span><span style="position:absolute;z-index:1;margin-top:310.6667px;width:666.0000px;height:318.0000px"><br/></span><span style="position:absolute;z-index:1;margin-top:310.6667px;width:666.0000px;height:318.0000px"><br/></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">對(duì)于各種現(xiàn)場(chǎng)電纜探測(cè)時(shí)，</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">ST</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">-6600B</span><span style="font-family:宋體">接收機(jī)具有一個(gè)非常有用的功能——電流測(cè)試功能。測(cè)試步驟為：先測(cè)定正確的電纜路徑，移動(dòng)接收機(jī)到目標(biāo)電纜的正上方。接收機(jī)的位置盡可能精確地位于電纜正上方。垂直拿著接收機(jī)不要晃動(dòng)，按動(dòng)電流鍵。接收機(jī)將顯示被測(cè)管線中的電流值，并顯示在液晶顯示器上。</span></span><span style="text-decoration:underline;"><span style="font-family: 宋體;line-height: 114%;font-size: 16px"><span style="font-family:宋體">不要在電纜的彎頭或</span><span style="font-family:Times New Roman">T</span><span style="font-family:宋體">接頭附近進(jìn)行電流測(cè)量。要獲得高的精度，至少離開(kāi)彎頭</span></span></span><span style="text-decoration:underline;"><span style="font-family: 'Times New Roman';line-height: 114%;font-size: 16px">5</span></span><span style="text-decoration:underline;"><span style="font-family: 宋體;line-height: 114%;font-size: 16px"><span style="font-family:宋體">米處進(jìn)行電流測(cè)量。</span></span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:宋體">由于場(chǎng)強(qiáng)隨</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">電纜</span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:宋體">深度變化，</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">ST</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">-6600B</span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:宋體">的電流測(cè)量功能可以準(zhǔn)確區(qū)分平行管線，即使管線的埋入深度不同，也能清楚的識(shí)別要</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">探測(cè)</span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:宋體">的</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">目標(biāo)</span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:宋體">管線。</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">在地下管線很多的情況下的目標(biāo)電纜（同發(fā)射器相連的管線）通常會(huì)感應(yīng)到其他相鄰的管線。在目標(biāo)電纜埋深比相鄰管線埋深深時(shí)，被感應(yīng)的相鄰管線中的信號(hào)傳到地面時(shí)有可能比在目標(biāo)管線中的信號(hào)還要強(qiáng)。操作者這時(shí)將發(fā)現(xiàn)兩根或兩根以上的管線，這時(shí)就需要用電流測(cè)試來(lái)判別出目標(biāo)電纜和相鄰的管線。用</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">ST</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">-6600B</span><span style="font-family:宋體">接收機(jī)測(cè)試電流的功能，操作者能讀出電纜中低頻或射頻的電流值。電流值最高的通常就是要探測(cè)的目標(biāo)電纜。在管線密集的區(qū)域，接收機(jī)可</span></span><strong></strong></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img68.chem17.com/9/20221029/638026312414616250683.png" title="~{FHF[4OR]G{3F5U28J%3`D.png" alt="~{FHF[4OR]G{3F5U28J%3`D.png"/></p><p><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">能會(huì)在旁邊的干擾</span></span><span style="font-family: 宋體;font-size: 16px"><span style="font-family:宋體">管線上探測(cè)到比目標(biāo)電纜更強(qiáng)的磁場(chǎng)信號(hào)，因?yàn)橄噜徆芫€的深度比目標(biāo)電纜淺。</span> </span></p><p style="text-indent: 38px"><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">先尋找被測(cè)電纜的路徑。盡可能精確的標(biāo)出這</span></span><span style="font-family: 宋體;font-size: 16px"><span style="font-family:宋體">些電纜的路徑。在電纜位置準(zhǔn)確定位后，將接收機(jī)置于地面上，機(jī)身垂直指向電纜中心，且與電纜的走向垂直。保持儀器穩(wěn)定按動(dòng)深度鍵，即會(huì)顯示深度數(shù)值。把接收機(jī)放在已做標(biāo)志的電纜路徑的正垂直的上面，放在地上。垂直的拿著接收機(jī)直到測(cè)試</span></span><span style=";font-family:宋體;font-size:16px"><span style="font-family:宋體">信號(hào)穩(wěn)定。按電流測(cè)試鍵。電流數(shù)字讀數(shù)將顯示出電纜中電流信號(hào)的大小。接著，再次測(cè)試第二根電纜，電流數(shù)字讀數(shù)將顯示出電纜中電流信號(hào)的大小。觀察梯形圖和數(shù)字讀數(shù)，兩讀數(shù)更高的意味著管線中的電流信號(hào)更大的也就是我們要尋找的目標(biāo)電纜。</span></span></p><p style="margin-bottom:6px;text-indent:32px;line-height:114%"><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">注意：</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">ST</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">-6600B</span><span style="font-family:宋體">接收機(jī)會(huì)對(duì)錯(cuò)誤的電流測(cè)試的操作報(bào)警。如果在電流測(cè)試期間顯示電流讀數(shù)為</span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:Times New Roman">“</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:Times New Roman">000</span></span><span style=";font-family:'Times New Roman';line-height:114%;font-size:16px"><span style="font-family:Times New Roman">"</span></span><span style=";font-family:宋體;line-height:114%;font-size:16px"><span style="font-family:宋體">，則表示接收機(jī)探測(cè)到錯(cuò)誤的電流讀數(shù)。</span></span></p><p><br/></p></div> <div id="1571n5fppxr7" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-3178353.html">管線定位儀工作原理及方法</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-3170912.html">氧化鋅避雷器測(cè)試相關(guān)解答【上海康登電氣】</a></b></p> <span><a href="/article.html">返回列表>></a></span> </div> </div> </div> </div> </div>    <div class="1571n5fppxr7" id="z_Footer"> <div id="1571n5fppxr7" class="pz_down"> <div id="1571n5fppxr7" class="w_1200"> <div id="1571n5fppxr7" class="footT"> <div id="1571n5fppxr7" class="footAddr"> <div id="1571n5fppxr7" class="footTit">上?？档请姎饪萍加邢薰?/div> <div id="1571n5fppxr7" class="dAddr"><img class="ico" 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