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href="/article.html">技術(shù)文章</a> > 電纜故障定點儀講解特點使用方法</div> <div id="nxnzvbt5" class="inpage_content"> <div id="nxnzvbt5" class="nr_main_box"> <h1 class="inside_rnewtil">電纜故障定點儀講解特點使用方法</h1> <div id="nxnzvbt5" class="inside_rnewtime">點擊次數(shù)：271 更新時間：2024-09-16</div> <div id="nxnzvbt5" class="inside_rnewcon"><p><strong><span style="font-size: 16px;">電纜故障定點儀講解特點使用方法</span></strong></p><p><span style="font-size: 16px;">電纜故障定點儀是利用振動拾聲和電磁感應原理來確定電纜故障點的具體位置。借助于高壓脈沖發(fā)生器使故障點閃絡(luò)放電，故障點閃絡(luò)放電所產(chǎn)生的振動波、聲波以及電磁波等物理現(xiàn)象經(jīng)定點儀專用探頭拾取，經(jīng)電纜故障定點儀放大處理并顯示和輸出,最終由測試人的聽覺和視覺來判斷故障點的精確位置。即完成電纜故障點“電纜的正上方，粗測的范圍內(nèi)"的精確定位任務(wù)。</span></p><p><span style="font-size: 16px;">本定點儀適用不同截面、不同介質(zhì)的各種材料的電力電纜、高頻同軸電纜、路燈電纜、地埋電線的低阻、短路、開路斷線故障,以及高阻泄漏和高阻閃絡(luò)性故障。技術(shù)參數(shù)符合符合《DL∕T 849.2電力設(shè)備專用測試儀通用技術(shù)條件第2部分：電纜故障定點儀》標準要求。</span></p><p><strong><span style="font-size: 16px;">電纜故障定點儀講解產(chǎn)品特點</span></strong></p><p><span style="font-size: 16px;">1.同步接收故障點放電時產(chǎn)生的振動波、聲波以及電磁波；</span></p><p><span style="font-size: 16px;">2.聲和磁通道單獨設(shè)計，單獨供電，抗干擾能力更強；</span></p><p><span style="font-size: 16px;">3.</span><span style="font-size: 16px;">超-強</span><span style="font-size: 16px;">的放大倍數(shù)，探測深度大于10米；</span></p><p><span style="font-size: 16px;">4.超低低功耗設(shè)計，靜態(tài)電流小于10mA，連續(xù)工作大于20小時；</span></p><p><span style="font-size: 16px;">5.模擬表頭設(shè)計，信號強弱和趨勢一目了然；</span></p><p><span style="font-size: 16px;">6.零電平任意調(diào)節(jié)，適用于各種強弱現(xiàn)場。</span></p><p><strong><span style="font-size: 16px;">電纜故障定點儀講解技術(shù)參數(shù)</span></strong></p><p><span style="font-size: 16px;">1.放大倍數(shù)，50萬倍；</span></p><p><span style="font-size: 16px;">2.定位精度：小于0.1m；</span></p><p><span style="font-size: 16px;">3.輸出阻抗：350Ω；</span></p><p><span style="font-size: 16px;">4.工作電源：標準3.7V 3200mAh電池4節(jié)；</span></p><p><span style="font-size: 16px;">5.靜態(tài)電流：＜10mA；</span></p><p><span style="font-size: 16px;">6.工作條件：環(huán)境溫度：-25～65℃；相對濕度：≤90％。</span></p><p><strong><span style="font-size: 16px;"><br/></span></strong></p><p><strong><span style="font-size: 16px;">電纜故障定點儀講解工作原理</span></strong></p><p><span style="font-size: 16px;">電纜故障點在高電壓脈沖作用下發(fā)生閃絡(luò)放電，故障點放電時同時存在回波、振動波、聲波、電磁波、紅外波以及瞬間短路等物理現(xiàn)象，電纜故障測試儀檢測故障點閃絡(luò)放電產(chǎn)生的回波及瞬間短路現(xiàn)象，完成故障點的粗測；電纜故障定點儀則利用故障點閃絡(luò)放電產(chǎn)生的振動波、聲波及電磁波完成故障點的精確定位。</span></p><p><span style="font-size: 16px;">該儀器工作原理如圖5-1所示。采用聲、磁通道獨立設(shè)計，單獨供電，大大提高了抗干擾能力，適用于各種故障現(xiàn)場。由于放大倍數(shù)超大，靈敏度更高，特別適用于較深的故障點定位；但它的不足是背景噪音相對就大了點。</span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img59.chem17.com/9/20240916/638620661654569397769.png" title="c159cea1-9df3-403c-af8b-961b83bc414f.png" alt="c159cea1-9df3-403c-af8b-961b83bc414f.png"/></p><p><span style="font-size: 16px;"> </span></p><p style="text-indent:31px;text-align:center"><span style="font-size: 16px;"><span style="font-family: 宋體; color: rgb(0, 0, 255); font-size: 19px;">圖</span><span style="font-family: 宋體; color: rgb(0, 0, 255); font-size: 19px;">5-1 </span><span style="font-family: 宋體; color: rgb(0, 0, 255); font-size: 19px;">定點儀工作原理框圖</span></span></p><p><span style="font-size: 16px;">電纜故障定點儀講解儀器布局與說明</span></p><p><span style="font-size: 16px;">6.1 儀器的組成</span></p><p><span style="font-size: 16px;">1.電纜故障定點儀：進行電纜故障點閃絡(luò)放電信號的處理達到精確定位目的；</span></p><p><span style="font-size: 16px;">2.探頭：包括探針、探頭、連接桿等，對故障點閃絡(luò)放電信號進行拾?。?/span></p><p><span style="font-size: 16px;">3.頭戴耳機；接定點儀輸出通道，對故障點閃絡(luò)放電信號進行</span><a class="bjFfcClass" style="font-size: 16px; text-decoration: underline;"><span style="font-size: 16px;">監(jiān)-聽</span></a><span style="font-size: 16px;">；</span></p><p><span style="font-size: 16px;">4.音頻線：連接定點儀與探頭，使故障點閃絡(luò)放電信號輸入定點儀；</span></p><p><span style="font-size: 16px;">5.充電器：打開儀器后蓋取出電池，對電池進行充電。</span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img59.chem17.com/9/20240916/638620663166693863268.png" title="a2cc06b6-7050-4c0b-885f-6fc99776edc9.png" alt="a2cc06b6-7050-4c0b-885f-6fc99776edc9.png"/></p><p><img src="https://www.chem17.com/UserManage/ueditor/themes/default/images/spacer.gif" word_img="file:///C:\Users\Administrator\Documents\Tencent Files\3502948309\nt_qq\nt_data\Pic\2024-09\Ori\dfdd7ab4b6e8f4ce2ce2e41d69ae80ba.jpg" style="background:url(https://www.chem17.com/UserManage/ueditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd"/><span style="font-size: 16px;">6.2 操作界面介紹<br/><br/> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img42.chem17.com/9/20240916/638620664249043118266.jpg" title="wps2.jpg" alt="wps2.jpg"/></p><p><br/> <br/><span style="font-size: 16px;"> 圖6-1 儀器前面板圖<br/><br/>1.指針表頭：指示故障點閃絡(luò)放電時的磁場強度；<br/>2.音量調(diào)節(jié)：在定點和路徑時調(diào)節(jié)，使我們耳朵聽到比較適當?shù)穆曇粜盘枺?br/><br/>3.工作方式：選擇工作方式（關(guān)機、定點、路徑）；<br/>4.頻率調(diào)節(jié)：在路徑探測的過程中調(diào)節(jié)接收頻率，使我們耳朵聽到比較容易識別的路徑信號，在定點調(diào)節(jié)可有效避開電臺信號；<br/>5.電平調(diào)節(jié)：調(diào)節(jié)磁場強度的基準，使表頭能有效擺動；<br/><br/> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img44.chem17.com/9/20240916/638620664580273693262.jpg" title="wps3.jpg" alt="wps3.jpg"/></p><p><img src="https://www.chem17.com/UserManage/ueditor/themes/default/images/spacer.gif" word_img="file:///C:\Users\Administrator\Documents\Tencent Files\3502948309\nt_qq\nt_data\Pic\2024-09\Ori\a006d4b032737754970d526f11a5d55f.jpg" style="background:url(https://www.chem17.com/UserManage/ueditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd"/> <br/><span style="font-size: 16px;"> 圖6-2 儀器上面板圖<br/><br/>1.輸入通道：精確定點時接探頭傳感器，（路徑探測時接探棒傳感器）；<br/>2.輸出通道：連接專用耳機。<br/>第七章使用示例<br/><br/>7.1 現(xiàn)場示意<br/><br/></span><img src="https://www.chem17.com/UserManage/ueditor/themes/default/images/spacer.gif" word_img="file:///C:\Users\Administrator\Documents\Tencent Files\3502948309\nt_qq\nt_data\Pic\2024-09\Ori\28b841e33d553ef6e03d469bed11177e.png" style="background:url(https://www.chem17.com/UserManage/ueditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd"/><span style="font-size: 16px;"> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img51.chem17.com/9/20240916/638620665289777442957.png" title="wps4.png" alt="wps4.png"/></p><p><br/><span style="font-size: 16px;"> 圖7-1 定點儀使用現(xiàn)場<br/></span><img src="https://www.chem17.com/UserManage/ueditor/themes/default/images/spacer.gif" word_img="file:///C:\Users\Administrator\Documents\Tencent Files\3502948309\nt_qq\nt_data\Pic\2024-09\Ori\4661996d3ad831b4be09018d92a5d92a.png" style="background:url(https://www.chem17.com/UserManage/ueditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd"/><span style="font-size: 16px;"> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img51.chem17.com/9/20240916/638620665452263838487.png" title="wps5.png" alt="wps5.png"/></p><p><br/><span style="font-size: 16px;"> 圖7-2 定點儀使用過程<br/>7.2 操作步驟<br/><br/>1.組裝：將探頭、探針（必要時）連接桿進行組裝；<br/><br/>2.接線：先將音頻線插入輸入通道，連接探頭；再將耳機插入輸出通道；<br/>3.調(diào)節(jié)“工作方式"旋鈕到“定點"位置(旋鈕旋轉(zhuǎn)一次和兩次均為定點)；<br/>4.調(diào)整“電平調(diào)節(jié)" 旋鈕，使得“特斯拉計"的表針有效地擺動；<br/><br/>5.調(diào)整“音量調(diào)節(jié)" 旋鈕，使得耳機的聲音適合使用者耳朵；<br/>6.調(diào)整好以后，在保證故障點擊穿閃絡(luò)放電的情況下，去“電纜的正上方，粗測的范圍內(nèi)"精確定點；<br/><br/>7.整個使用過程，一定要確保探頭在電纜的正上方，粗測的范圍內(nèi)進行；在“音量調(diào)節(jié)"和“電平調(diào)節(jié)"不變的情況下，當A1點-A2點的信號強度逐步減弱，其B點耳機聲音最大，特斯拉計表針擺動</span><a class="bjFfcClass" style="font-size: 16px; text-decoration: underline;"><span style="font-size: 16px;">最-強</span></a><span style="font-size: 16px;">，且與聲音同步，該點即為故障點。如上圖B點為故障點。<br/>第八章儀器使用注意事項及常見故障<br/>8.1 注意事項<br/><br/> 1.儀器使用完成后，請將“工作方式"旋鈕調(diào)整至“o"，使得儀器關(guān)機； <br/><br/> 2.電池電壓不足時，儀器靈敏度下降，應即時給電池充電；<br/> 3.儀器出現(xiàn)故障時應送原廠維修，切不可隨意拆卸，以防不測；<br/> 4.探頭為敏感元件，嚴禁拆開。<br/>8.2 常見故障<br/><br/> 1.磁場指針無擺動，無法測試磁場信號。<br/> 說明：a、檢測電池是否電量充足；<br/><br/> b、檢測“電平調(diào)節(jié)"旋鈕的增益是否調(diào)節(jié)合適；<br/><br/> c、檢測“定點儀"與“探頭"連接線是否連接可靠。<br/> 2.定點或敲擊探頭時，耳機無聲音。<br/> 說明：a、檢測電池是否電量充足；<br/><br/> b、檢測“電平調(diào)節(jié)"旋鈕的增益是否調(diào)節(jié)合適；<br/><br/> c、檢測“定點儀"與“探頭"連接線是否連接可靠。<br/> 3.定點偶爾聽見FM廣播信號。<br/> 說明：a、說明定點儀工作正常，但不影響定點工作；<br/><br/> b、調(diào)節(jié)“頻率調(diào)節(jié)"旋鈕可能有所改善。</span><br/></p></div> <div id="nxnzvbt5" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-3810367.html">電纜路徑儀特點工作原理</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a 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