A carbon monoxide detection device based on mid-infrared absorption spectroscopy at 4.6 mu m

作者：Li Guo Lin; Sui Yue; Dong Ming; Ye Wei Lin; Zheng Chuan Tao^*; Wang Yi Ding

来源：Applied Physics B: Lasers and Optics , 2015, 119(2): 287-296.

DOI：10.1007/s00340-015-6056-6

We present a differential carbon monoxide (CO) concentration sensing device using a self-fabricated spherical mirror (e.g., light collector) and a multi-pass gas chamber. Single-source dual-channel detection method is adopted to suppress the interferences from light source, optical path, and environmental changes. The detection principle of the device is described, and both the optical part and the electrical part are designed and developed. Experiments are carried out to evaluate the sensing performances on CO concentration. The results indicate that the limit of detection is about 10 ppm with an absorption length of 40 cm. As the gas concentration gets larger than 100 ppm, the relative detection error falls into the range of -1.7 to +1.9 %. Based on 12-h long-term measurements on the 100 and 1000 ppm CO samples, the maximum detection errors are about 0.9 and 5.5 %, respectively. Benefit from low cost and competitive characteristics, the proposed device shows potential applications in CO detection under the circumstances of coal-mine production and environmental protection.

• 单位
  吉林大学