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<a href="/ParentList-2498399.html" target="_blank" onmouseover="showsubmenu('液液萃取儀')"><b>液液萃取儀</b></a> </li> </ul> </div> </div> </div> <div id="824maem" class="ny_new"> <div id="824maem" class="ny_tit ny_tit1"><img src="/Skins/434082/images/wz_tb.png"/><a href="/">網(wǎng)站首頁</a> ◇ <a href="/article.html">技術(shù)支持</a> ◇ 粉塵檢測儀的工作原因有3種分類</div> <div id="824maem" class="inside_rnewscon"> <h1 class="newsname">粉塵檢測儀的工作原因有3種分類</h1> <li id="824maem" class="time" style="padding:15px 0; text-align:center; color:#b4b4b4;">更新日期：2020-07-20 信息來源：瀏覽次數(shù)：1315</li> <ul class="dcont"> <p style="text-align: justify;"> <div>　　<strong>粉塵檢測儀</strong>與他主要是會用在環(huán)境當中一個粉塵濃度上的檢測在目前人們對所居住的環(huán)境上的要求越發(fā)的增高，而這個粉塵檢測儀的銷售量也是在慢慢的提升，而這個行業(yè)也是會被很多人來重視。</div><div>　　粉塵檢測儀的工作原理主要是光吸收、光散射、β射線和交流靜電感應(yīng)原理。</div><div>　　光吸收原理：</div><div>　　抽氣泵抽取一定體積的含塵空氣，粉塵被阻留在濾紙上。光束透過濾紙照到硅光電池上，硅光電池接收照度的變化引起硅光電池輸出電流強度的變化。在一定范圍內(nèi)，濾紙阻留粉塵量與硅光電池的輸出電流呈線性廣西，通過檢測儀內(nèi)設(shè)定的計算程序換算成粉塵濃度而顯示出來。</div><div>　　β射線原理：</div><div>　　利用塵?？梢晕?beta;射線的原理而研制的。檢測儀內(nèi)的放射源產(chǎn)生的β射線通過粉塵粒子時，粉塵粒子吸收β射線，根據(jù)粉塵吸收β射線的量與粉塵質(zhì)量成線性關(guān)系計算并顯示粉塵濃度。</div><div>　　光散射原理：</div><div>　　粉塵儀通過采氣泵將待測氣溶膠吸入檢測艙，待測氣溶膠在分支處分流成為兩部分，一部分經(jīng)過一個高效過濾器后被過濾為干凈的空氣，作為保護鞘氣來保護傳感器室的元器件不受待測氣體污染。另一部分氣溶膠,作為待測樣品直接進入傳感器室。傳感器室中，主要元器件為激光二極管、透鏡組和光電檢測器。檢測時，首先由激光二極管發(fā)出的激光，通過透鏡組形成一個薄層面光源。薄層光照射在流經(jīng)傳感器室的待測氣溶膠時，會產(chǎn)生散射，通過光電探測器來檢測光的散射光強。光電探測器受光照之后產(chǎn)生電信號,正比于氣溶膠的質(zhì)量濃度。然后乘以電壓校準系數(shù),這個系數(shù)通過測定特定濃度的氣溶膠來得到。通常用來做標定的測試氣溶膠是亞利桑那試驗粉塵(或ISO12103-1,A1試驗粉塵)。</div><div>　　靜電交流感應(yīng)原理</div><div>　　利用粉塵顆粒流經(jīng)探頭時與探頭之間的動態(tài)電荷感應(yīng)產(chǎn)生信號。交流靜電</div><div>　　技術(shù)以監(jiān)測電荷信號的標準偏移來確定交流信號的擾動量，并以即時擾動量的大小來確定粉塵排放量。</div></p> 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