CAJ | 학술논문

研究了一种新型非色散红外的CO2气体传感器，其中该气体传感器的检测腔体采用中红外空心光纤。论文中所用到的中红外光纤在CO2的吸收峰4.26μm处具有低损耗的特点，降低了红外光在此波段的损耗，提高了系统的灵敏度和选择性。实验结果表明，新型的非色散的CO2气体传感器系统对5ppmCO2气体具有8.33mv电压幅值响应，优于传统的不锈钢金属检测腔体；空心光纤的气体传感器的响应时间低于10s；该传感器的灵敏度为1.82mV/ppm。
연구료일충신형비색산홍외적CO2기체전감기，기중해기체전감기적검측강체채용중홍외공심광섬。논문중소용도적중홍외광섬재CO2적흡수봉4.26μm처구유저손모적특점，강저료홍외광재차파단적손모，제고료계통적령민도화선택성。실험결과표명，신형적비색산적CO2기체전감기계통대5ppmCO2기체구유8.33mv전압폭치향응，우우전통적불수강금속검측강체；공심광섬적기체전감기적향응시간저우10s；해전감기적령민도위1.82mV/ppm。
A novel CO2 non-dispersive infrared (NDIR) sensor using the mid-infrared (mid-IR) hollow fiber as a gas cell has been demonstrated. The mid-IR hollow fiber is chosen for its optimum transmission band (band-gap) overlap with CO2 fundamental absorption spectrum around 4.26μm to serve as a filter. A comparison with the system using a smooth metal cell is presented. The signal noise suggests that a measurement resolution better than 5 ppm concentration is achievable using this mid-IR hollow fiber. The response time of the system using hollow fiber can be in the order of shorter than 10s with the sensitivity of 1.82 mv/ppm.