Research on erasing CO2 influence on the detection of SO2 based on data fusion

Studying the infrared spectrum absorption characters of SO₂ and CO₂ in middle infrared region, we have found that the band which CO₂ effects the measure result of SO2, and mathematical model is established which is to erase the cross disturbance of CO₂. The O₂ concentration detection device of single light-four detectors is designed to measure the concentrations of SO₂ and CO₂ respectively by two pairs of light filters and detectors. Fitting curve equation between SO₂ and CO₂ are gained by experiment data fusion. This method overcomes deficiency of single measure method, erasing the influence of CO₂ on SO₂ measure precision efficiently. Thus, an effective method is found to analyze infrared gases.