作為微型氣相色譜儀(Micro GC)的關鍵部件的微型熱導檢測器(Micro TCD),其噪聲主要來自于溫度波動和氣流抖動等因素。從理論上分析了Micro TCD噪聲的主要來源,使用COMSOL仿真得到了溫度波動對系統(tǒng)噪聲的影響,并詳述了Micro TCD加熱模塊的電路部分和算法部分。測試表明:Micro TCD的溫度波動約為0.09℃,達到了商用GC控溫精度的標準。

　　編號:20231109005

　　名稱:熱導檢測器

　　型號:TCD-790

　　As a key component of Micro Gas Chromatograph (Micro GC), the noise of Micro Thermal Conductivity Detector (Micro TCD) mainly comes from factors such as temperature fluctuations and airflow jitter. The main sources of Micro TCD noise were theoretically analyzed, and the impact of temperature fluctuations on system noise was simulated using COMSOL. The circuit and algorithm parts of the Micro TCD heating module were detailed. Tests have shown that the temperature fluctuation of Micro TCD is about 0.09 ℃, meeting the standard for commercial GC temperature control accuracy.

　　No.: 20231109005

　　Name: Thermal conductivity detector

　　Model: TCD-790