作为微型气相色谱仪(Micro GC)的关键部件的微型热导检测器(Micro TCD),其噪声主要来自于温度波动和气流抖动等因素。从理论上分析了Micro TCD噪声的主要来源,使用COMSOL仿真得到了温度波动对系统噪声的影响,并详述了Micro TCD加热模块的电路部分和算法部分。测试表明:Micro TCD的温度波动约为0.09℃,达到了商用GC控温精度的标准。

　　编号:20231109005

　　名称:热导检测器

　　型号: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