CAJ | 학술논문

采用光谱法进行低浓度CO（ ppm量级）检测时，由于信号强度低，噪声强，很难真实有效的将信号将测出来。针对这一特点，设计了一种基于可调谐半导体激光吸收光谱（ TDLAS）技术的低浓度CO气体在线监测系统。该系统采用TDLAS技术，可以获得精细的CO吸收光谱信息，因此可以降低其他成分吸收的干扰。同时采用放大－滤波－再放大过程实现系统降噪，能够很好的获得低浓度CO的光吸收信息。经测试，该系统还具有较好的实时性、灵敏度和较高的准确性。
채용광보법진행저농도CO（ ppm량급）검측시，유우신호강도저，조성강，흔난진실유효적장신호장측출래。침대저일특점，설계료일충기우가조해반도체격광흡수광보（ TDLAS）기술적저농도CO기체재선감측계통。해계통채용TDLAS기술，가이획득정세적CO흡수광보신식，인차가이강저기타성분흡수적간우。동시채용방대－려파－재방대과정실현계통강조，능구흔호적획득저농도CO적광흡수신식。경측시，해계통환구유교호적실시성、령민도화교고적준학성。
Because of the signal intensity is low and the noise is strong , it is often difficult to detect the signal effectively in the way of low concentration ( ppm) of CO spectroscopy detection .According to this characteristic , a tunable diode laser absorption spectroscopy ( TDLAS) based on the online monitoring system of low concentration CO gas technology was designed .The system u-ses TDLAS technology , and can obtain a precise CO absorption spectrum information , thus reducing the interference of other com-ponents of absorption .At the same time , amplifier filter-reamplification process was used to achieve noise reduction of the system , and it is a good method to get the information of low concentration CO light .After testing,the system has better real-time,sensitivi-ty and high accuracy .