140CPU65160
140CPU65160
這兩束紅外線(xiàn)中的一路通過(guò)測(cè)量室4進(jìn)入檢測(cè)室6，另一路通過(guò)參比室5進(jìn)入檢測(cè)室6，參比室中密封的是不吸收紅外線(xiàn)的氣體，它的作用是保證兩束紅外線(xiàn)的光學(xué)長(zhǎng)度相等，即幾何長(zhǎng)度加上通過(guò)的窗口數(shù)要相等，因此通過(guò)參比室的紅外線(xiàn)，光強(qiáng)和波長(zhǎng)范圍基本上不變，而另一束紅外線(xiàn)通過(guò)測(cè)量室時(shí)，因測(cè)量室中的待測(cè)氣體按照其波長(zhǎng)吸收特征吸收相應(yīng)的紅外光線(xiàn)，其光強(qiáng)減弱，所以進(jìn)入檢測(cè)室的紅外線(xiàn)就被選擇性的吸收，待測(cè)組分氣體吸收紅外線(xiàn)能量后，氣體分子的熱運(yùn)動(dòng)加強(qiáng)，產(chǎn)生熱膨脹形成壓力的變化，由于進(jìn)入檢測(cè)室兩側(cè)紅外線(xiàn)能量不同，兩側(cè)氣室中的待測(cè)組分吸收紅外線(xiàn)能量也不同，因此左右兩側(cè)氣室內(nèi)氣體的溫度變化也不同，壓力變化也就不同，必然是左側(cè)氣室內(nèi)的氣體的壓力大于右側(cè)氣室內(nèi)氣體的壓力，此壓力差推動(dòng)薄膜7產(chǎn)生位移(圖8‐7中薄膜是鼓向右側(cè))，從而改變了薄膜7與另一定片8之間的距離，因薄膜與定片組成一個(gè)電容器，它們之間距離的變化改變了電容器的電容量，因此電容的大小與樣品中待測(cè)組分的含量有關(guān)。
◆ 企業(yè)名稱(chēng)：廈門(mén)泰尼電氣有限公司
◆ 主營(yíng)業(yè)務(wù)：DCS,PLC
◆ 經(jīng)營(yíng)模式： 貿(mào)易
◆ 貿(mào)易地區(qū)： 全國(guó)
◆ ： 小黃《女士》
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