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class="ly_crumb"> <img src="/skins/582807/images/crumb_icon.png" /><p>當(dāng)前位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > <span>β射線揚(yáng)塵在線監(jiān)測(cè)的工作原理介紹</span></p> </div>   <div id="ltrj1tr" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">β射線揚(yáng)塵在線監(jiān)測(cè)的工作原理介紹</h1> <div id="ltrj1tr" class="NyNewsdetail_tips">更新時(shí)間：2023-09-20 點(diǎn)擊次數(shù)：592</div> <div id="ltrj1tr" class="NyNewsdetail_con"> <div>β射線揚(yáng)塵在線監(jiān)測(cè)對(duì)建筑施工揚(yáng)塵污染對(duì)人體健康損害進(jìn)行研究必要性，建筑施工揚(yáng)塵是因建筑施工人為活動(dòng)而引起的，其揚(yáng)塵顆粒在施工人為活動(dòng)的影響下會(huì)隨著空氣流動(dòng)而移動(dòng)，然后變成細(xì)小顆粒物，易被人吸食，一旦進(jìn)入肺中，就會(huì)引起一系列疾病，甚至危害人們的生命。</div><p> </p><div>　　β射線揚(yáng)塵在線監(jiān)測(cè)儀的主機(jī)面板有顯示屏和按鍵，實(shí)現(xiàn)人機(jī)交互功能。內(nèi)部集成有采樣系統(tǒng)、機(jī)械傳動(dòng)控制、信號(hào)檢測(cè)與數(shù)據(jù)處理、數(shù)據(jù)傳輸系統(tǒng)等。它是儀器的大腦主要負(fù)責(zé)信息處理與跟人類外交這兩個(gè)功能。</div><div>射線作為輻射源，抽氣泵對(duì)大氣進(jìn)行采樣，在采樣時(shí)監(jiān)測(cè)儀實(shí)時(shí)監(jiān)控抽氣的流量，大氣中的懸浮顆粒被吸附在β源和閃爍體探測(cè)器之間的濾紙表面，抽氣前后閃爍體探測(cè)器計(jì)數(shù)值的改變反映了濾紙上吸附灰塵的質(zhì)量，根據(jù)采樣體積換算為單位體積空氣中懸浮顆粒的濃度。</div><div> </div><div>　　β射線揚(yáng)塵在線監(jiān)測(cè)儀根據(jù)β射線吸收原理設(shè)計(jì)，β射線是一種高速電子流，高能量的粒子由發(fā)射出來碰到塵粒子時(shí)，能量減退或被粒子吸收。β射線強(qiáng)度一定時(shí)，被吸收量大小只與吸收物質(zhì)的質(zhì)量有關(guān)，與吸收物質(zhì)的物化特性無關(guān)。物質(zhì)放置在發(fā)射源和監(jiān)測(cè)β射線的裝置中間，β射線被吸收則能量衰減從從而導(dǎo)致監(jiān)測(cè)到的β粒子的數(shù)量減少</div><div> </div><div>　　β射線揚(yáng)塵在線監(jiān)測(cè)采用了β射線衰減的原理對(duì)粒子進(jìn)行監(jiān)測(cè)，可以實(shí)時(shí)監(jiān)測(cè)環(huán)境大氣中PM2.5、PM10、TSP顆粒物的濃度水平。該儀器長(zhǎng)期廣泛適用于環(huán)境空氣顆粒物的濃度監(jiān)測(cè)，如PM10、PM2.5、TSP（選配不同的采樣切割頭）等，結(jié)合氣象參數(shù)，準(zhǔn)確分析污染原因，溫度控制裝置可在惡劣條件下正常運(yùn)作。</div><p><br/></p> </div> 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