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直讀式粉塵濃度測量儀原理

发布日期：2025-01-07 16:25:06 作者：揚塵檢測儀來源：揚塵監測系統浏覽量：2787

粉塵檢測儀是一種便攜式的直讀式設備，用于連續監測可吸入粉塵的濃度。一款優質的檢測儀能夠在一定程度上准確測量可吸入粉塵的濃度範圍，幫助確認檢測環境中的粉塵含量是否超標。

粉塵檢測儀的設計依據衛生行業的標准：“公共場所空氣中可吸入顆粒物(PM2.5、PM10)測定方法光散射法”(WS/T206-2001)。它由感應器和數據處理器組成，其中感應器是數據采集的核心部件。

感應器的工作原理是將激光束通過一組非球面鏡轉化爲功率密度均勻的細測量光束，在光束軌迹的側前方設置一個前焦點，散射光收集透鏡組的焦點也位于此處。當空氣樣本通過激光束與散射光收集透鏡組的前焦點交彙處時，空氣中的顆粒物會發出與其物理尺寸相對應的散射光。散射光被光學透鏡收集後，在後焦點處由光電轉換器件接收並轉換爲電信號。感應器的采樣氣體進口位于儀器的頂部，采樣動力由無刷直流風機提供。數據處理器則將感應器收集的電信號經過電子切割器分離大顆粒後，由微處理器進行濕度、質量濃度等換算。最終結果通過LED顯示器顯示、存儲或打印出來.

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