| 气相色谱热导检测器的信号测量与电源电路研究 |
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| 引用本文： | 刘影,谢驰,刘奇.气相色谱热导检测器的信号测量与电源电路研究[J].现代仪器,2007,13(2):36-38. |
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| 作者姓名： | 刘影 谢驰 刘奇 |
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| 作者单位： | 1. 四川大学电气信息学院,成都,610065
2. 四川大学测试与控制工程系,成都,610065 |
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| 摘 要： | 在气相色谱仪中,采用热导检测器检测物质成分的浓度变化,具有构造简单、测定范围广、稳定性好、线性范围宽等优点。针对气相色谱热导检测器的弱信号失真和电源不稳定问题,研究与设计热导检测器的弱信号测量电路、信号放大电路以及电源电路。实践表明,该方法有效提高气相色谱热导检测系统的可靠性。
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| 关 键 词： | 气相色谱 热导检测 信号测量 电路分析 |
Study of signal measurement and power circuit for modern-gas chromatography thermal conductivity detector |
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| Liu Ying,Xie Chi,Liu Qi.Study of signal measurement and power circuit for modern-gas chromatography thermal conductivity detector[J].Modern Instruments,2007,13(2):36-38. |
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| Authors: | Liu Ying Xie Chi Liu Qi |
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| Affiliation: | Sichuan University,Chengdu 610065 |
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| Abstract: | As the thermal conductivity detector is used in the modern-gas chromatography analytical instrument,it hassome abvantages of the simple structure,wide linear determining range ang good stability.The analysis of the weak signal circuit,amplifying circuit of the signal and power circuit in the thermal conductivity detector has been done,and the characteristic of the circuits with the rhenium tungsten filament is designed.Finally,the sensitivity and effect condition of gas-chromatography thermal conductivity detection system can be greatly increased. |
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| Keywords: | Gas chromatography Thermal conductivity detection Weak signal measurement circuit analysis |
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