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src="http://tyunfile.71360.com/UpLoadFile/2019/6/21/15/636967294269983748_jiangsutianrui_2059905.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="sbdqcrv" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/6/21/15/636967294269983748_jiangsutianrui_2059905.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ix7rtfx" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南京高精度鍍層測(cè)厚儀</p><p><span>***更新：</span>2020-06-20 12:23:20</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3i3j3ap" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江蘇天瑞儀器股份有限公司</a></p><p><span>聯(lián)系人：</span>劉偉</p><p><span>郵箱: </span>13915732363@163.com</p><p><span>電話: </span>13915732363</p><p><span>傳真: </span>0512_57017001</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0512-57017022</p><p><span>地址: </span>昆山市中華園西路1888號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="kovn7tv" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="zjqdkm8" class="box"><p><p style="text-indent:25px">渦流測(cè)量原理高頻交流信號(hào)在測(cè)頭線圈中產(chǎn)生電磁場(chǎng)，南京高精度鍍層測(cè)厚儀，測(cè)頭靠近導(dǎo)體時(shí)，就在其中形成渦流。測(cè)頭離導(dǎo)電基體愈近，則渦流愈大，反射阻抗也愈大。這個(gè)反饋?zhàn)饔昧勘碚髁藴y(cè)頭與導(dǎo)電基體之間距離的大小，也就是導(dǎo)電基體上非導(dǎo)電覆層厚度的大小。由于這類測(cè)頭專門測(cè)量非鐵磁金屬基材上的覆層厚度，所以通常稱之為非磁性測(cè)頭。非磁性測(cè)頭采用高頻材料做線圈鐵芯，例如鉑鎳合金或其它新材料。與磁感應(yīng)原理比較，主要區(qū)別是測(cè)頭不同，信號(hào)的頻率不同，信號(hào)的大小、標(biāo)度關(guān)系不同。與磁感應(yīng)測(cè)厚儀一樣，渦流測(cè)厚儀也達(dá)到了分辨率0.1um，允許誤差1%，南京高精度鍍層測(cè)厚儀，量程10mm的高水平。采用電渦流原理的測(cè)厚儀，原則上對(duì)所有導(dǎo)電體上的非導(dǎo)電體覆層均可測(cè)量，如航天航空器表面、車輛、家電、鋁合金門窗及其它鋁制品表面的漆，塑料涂層及陽極氧化膜，南京高精度鍍層測(cè)厚儀。覆層材料有一定的導(dǎo)電性，通過校準(zhǔn)同樣也可測(cè)量，但要求兩者的導(dǎo)電率之比至少相差3-5倍（如銅上鍍鉻）。雖然鋼鐵基體亦為導(dǎo)電體，但這類任務(wù)還是采用磁性原理測(cè)量較為合適。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京高精度鍍層測(cè)厚儀" src="http://tyunfile.71360.com/UpLoadFile/2019/6/21/15/636967294269983748_jiangsutianrui_2059905.jpg"></div><p style="text-indent:25px">鍍層測(cè)厚儀鍍層厚度測(cè)量已成為加工工業(yè)、表面工程質(zhì)量檢測(cè)的重要環(huán)節(jié)，是產(chǎn)品達(dá)到優(yōu)等質(zhì)量標(biāo)準(zhǔn)的必要手段。為使產(chǎn)品國際化，我國出口商品和涉外項(xiàng)目中，對(duì)鍍層厚度有了明確要求。鍍層厚度的測(cè)量方法主要有：楔切法，光截法，電解法，厚度差測(cè)量法，稱重法，X射線熒光法，β射線反向散射法，電容法、磁性測(cè)量法及渦流測(cè)量法等等。這些方法中**種是有損檢測(cè)，測(cè)量手段繁瑣，速度慢，多適用于抽樣檢驗(yàn)。射線和β射線法是無接觸無損測(cè)量，測(cè)量范圍較小，X射線法可測(cè)極薄鍍層、雙鍍層、合金鍍層。β射線法適合鍍層和底材原子序號(hào)大于3的鍍層測(cè)量。電容法*在薄導(dǎo)電體的絕緣覆層測(cè)厚時(shí)采用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京高精度鍍層測(cè)厚儀" src="http://tyunfile.71360.com/UpLoadFile/2019/6/21/15/636967294585719783_jiangsutianrui_8099275.jpg"></div><p style="text-indent:25px">磁感應(yīng)測(cè)量原理采用磁感應(yīng)原理時(shí)，利用從測(cè)頭經(jīng)過非鐵磁覆層而流入鐵磁基體的磁通的大小，來測(cè)定覆層厚度。也可以測(cè)定與之對(duì)應(yīng)的磁阻的大小，來表示其覆層厚度。覆層越厚，則磁阻越大，磁通越小。利用磁感應(yīng)原理的測(cè)厚儀，原則上可以有導(dǎo)磁基體上的非導(dǎo)磁覆層厚度。一般要求基材導(dǎo)磁率在500以上。如果覆層材料也有磁性，則要求與基材的導(dǎo)磁率之差足夠大（如鋼上鍍鎳）。當(dāng)軟芯上繞著線圈的測(cè)頭放在被測(cè)樣本上時(shí)，儀器自動(dòng)輸出測(cè)試電流或測(cè)試信號(hào)。早期的產(chǎn)品采用指針式表頭，測(cè)量感應(yīng)電動(dòng)勢(shì)的大小，儀器將該信號(hào)放大后來指示覆層厚度。近年來的電路設(shè)計(jì)引入穩(wěn)頻、鎖相、溫度補(bǔ)償?shù)鹊匦录夹g(shù)，利用磁阻來調(diào)制測(cè)量信號(hào)。還采用專利設(shè)計(jì)的集成電路，引入微機(jī)，使測(cè)量精度和重現(xiàn)性有了大幅度的提高（幾乎達(dá)一個(gè)數(shù)量級(jí)）?，F(xiàn)代的磁感應(yīng)測(cè)厚儀，分辨率達(dá)到0.1um，允許誤差達(dá)1%，量程達(dá)10mm。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/325688.html</p></div></div></div></div></div><div id="hb7swse" class="page-right twoColRt"><div id="8dnzwda" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="u23na88" class="recomPic likePro"><a 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