GONG Jiang-tao. Research on improving method of SNR of electrically modulated NDIR sensor[J]. 2014, 33(8): 34-36. DOI: 10.13873/j.1000-9787(2014)08-0034-03.
Introduce method for SNR improvement of electrically modulated non-dispersive infrared(NDIR)sensor.Based on test of trace elements in coal
there are some problems such as while using NDIR sensor to measure element corresponding to gas concentration
effect of light source stability on analysis results
effect of temperature on test results
influence of gas chamber noise on test results and influence of filtering method in process of post weak signal processing on test results and other issues
discuss reasons for these problems may exist
and make pointed design improvements and optimization of method are carried out
and SNR of the entire test system is improved greatly.