摘要
在分析了国内外便携式烟气分析仪现状的基础上,由于不同气体对紫外线光源的吸收以及对紫外线光源最佳吸收波段的不同,该烟气分析仪通过采用光谱分析的方法对气体的浓度进行精确测量,克服了传统电化学传感器寿命和交叉干扰等缺点;系统将气体首先通过紫外光源进行对其吸收,然后将气体吸收过的紫外线光源传送给微型光谱分析仪,光谱分析仪将通过特殊电路将光谱信号转化为电信号传送给ARM处理器进行数据处理以计算出气体浓度,并通过LCD显示屏显示;经测试,烟气分析仪测量气体浓度的结果在2%精度之内,体现了嵌入式系统便携式、智能化、高精度、微型化的特点。
In the analysis of domestic and international status of portable flue gas analyzer,different gases on the absorption of UV light and the best absorption wavelengths of ultraviolet light is different.Portable flue gas analyzer based on ARM overcomes the traditional electrochemical sensor life and cross-interference shortcomings by using the method of spectrum analysis to measure gas concentrations accurately.Portable flue gas analyzer based on ARM let the gas to absorb ultraviolet light when it through ultraviolet light sources,and then had the UV absorption of the gas sent to the micro-light spectrum analyzer.Spectrum analyzer convert spectrum signals into electrical signals through a special circuit and send it to ARM processor for data processing to calculate the gas concentration,display by the LCD screen.The accuracy of gas concentrations measured by the flue gas analyzer is controlled within 2%.This reflects the portable embedded systems,intelligence,precision and miniaturization characteristics.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第7期1788-1790,1797,共4页
Computer Measurement &Control
基金
西安工业大学校长基金项目资助(XAGDXJJ0917)
