Non-dispersive infrared multi-component Freon gas detection system

The invention relates to a non-dispersive infrared multi-group Freon gas detection system. The which comprises a light source, a straight-through gas chamber, a photoelectric conversion device, a signal processing and analyzing module, an upper computer and a non-imaging condensation light cone positioned between the straight-through gas chamber and the photoelectric conversion device, and the signal processing and analyzing module is used for calculating the predicted value at the moment k according to the difference between the measured value at the moment k and the predicted value at the moment k-1. According to the method, the measurement precision of the concentration value obtained for a long time is estimated through an Arrhenian variance method, and the detection precision can reach 0.01 ppm along with the increase of the integral time. 本发明一种非分散红外多组氟利昂气体检测系统，包括光源、直通式气室、光电转换装置、信号处理与分析模块及上位机，其中，该检测系统还包括位于所述直通式气室与光电转换装置之间的非成像聚光光锥；所述信号处理与分析模块，根据k时刻的测量值与k-1时刻的预测值的差计算k时刻的预测值。本发明将长时间得到的浓度值，通过阿伦方差的方法估计测量精度，随积