基于NDIR原理单光源单光路实现多组分测量的技术开发

Development of multicomponent measurement by single light source and optical path based on a infrared gas analyzer of NDIR principle

为满足以较经济的成本进行多种组分测量分析,对基于NDIR原理工作的测量仪器本研究通过设置不同谱带的滤光技术,解决了单光源单光路条件下多种不同气体对红外吸收谱带问题。此创新设计中的关键内容是红外光源发生装置的改进设计以及光源调制马达的定位,以解决其润滑挥发组分引起的对红外吸收的扰动;此外,将原固定的单个滤光片重新设计为可轮转的滤光器结构,实现在对红外光线进行调制的同时,展宽了具有针对性的红外吸收谱带,给出了样气中不同组分的红外吸收频段;找到了滤光器精密启动定位运行的新算法和控制技术,相应地也进行了硬件支撑平台的重新设计。

The main improvements are new design of the light source, which can solve the disturbance of infrared absorption caused by the lubricating volatile component, and the rotating filter structure for modulation of infrared light, which expands the infrared absorption spectrum to deal with different components. A new algorithm and a control technique were proposed to accurately locate and start the new filter. The hardware platform was also redesigned.