【摘要】 利用分子红外光波段的吸收光谱特性,本文研究了机动车尾气CO和CO₂的快速响应非分光红外（non-dispersion infrared）遥测技术,系统采用单个红外探测器测量CO、CO₂和背景,微弱信号的检测采用光斩波器与锁相放大器的组合以及接收和发射一体的系统结构,克服了传统技术检测精度低、无法检测行进中机动车排放的尾气等缺点.本文还研究了静态条件下气体浓度和测量信号之间的关系,动态测量表明该技术可以完全非接触在线自动监测机动车行驶过程中排放的尾气.更多还原

【Abstract】 According to the characteristic of gas molecule absorbability in infrared light, remote measurement of vehicles emission CO and CO2 by non-dispersion infrared was investigated in this paper. By using single IR detector, CO,CO2 and background were measured. The combination of gas filter and lock-in-amplifier were used to detect the week signal. Many shortcomings of conventional method were conquered, such as low precision of detection and the detection of vehicles which under real-world driving condition. The relation of gas concentration and signal under immobile condition was also described. The mobile condition results show that the emission from vehicles which under real-world driving condition can be measured online automatically.更多还原