[1]高乾.基于非色散红外吸收原理的可燃气体浓度探测仪研制[J].工业仪表与自动化装置,2018,(01):78-81.[doi:1000-0682（2018）01-0000-00]
　GAO Qian.A NDIR principle based combustible gas concentration detection system[J].Industrial Instrumentation & Automation,2018,(01):78-81.[doi:1000-0682（2018）01-0000-00]
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基于非色散红外吸收原理的可燃气体浓度探测仪研制

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: A NDIR principle based combustible gas concentration detection system

Author(s):: GAO Qian; Qingdao Hohowit Engineering & Technology Co., Ltd , Shandong Qingdao 266001, China

Keywords:: combustible gas; concentration monitor; NDIR; gas sensor; methane; small signal detection

摘要:: 该文设计了一种基于非色散红外吸收原理(NDIR)的可燃气体浓度探测仪。设计了针对可燃气体特性的气体检测室，针对红外热释电探测器输出的特性设计了微弱信号放大电路，使用前端放大器对红外热释电探测器输出的微弱信号进行前端放大，然后对滤波放大后的信号进行采样转换。通过对不同浓度范围的标准可燃气体进行实验测量，拟合得到探测器输出的电压值之比和气体浓度之间的关系，并对可燃气体进行实时测量试验。验证了该检测仪在测量精度、范围等方面的优势。

Abstract:: This paper designs a combustible gas concentration detection system based on non-dispersive infrared absorption principle(NDIR).According to properties of the combustible gas,the structure of combustible gas reaction chamber is designed.The detection system designs weak signal amplification circuit aiming at characteristics of infrared detector output, then the signal of filtered and amplified is sampled conversion by AD converter.Through experimental measurements of standard combustible gas at range of different concentration,the relationship between the ratio of infrared detector’s voltage and gas concentration is obtained.By the experimental measurements,the advantage of combustible gas concentration detection system in accuracy and range field is validated.

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更新日期/Last Update: 2018-02-01