Performance of a Mid-Infrared Sensor for Simultaneous Trace Detection of Atmospheric CO and N₂O Based on PSO-KELM.

ABSTRACT: In this article, a field deployable sensor was developed using a self-developed 4.58-µm continuous wave quantum cascade laser (CW-QCL) for the simultaneous detection of carbon monoxide (CO) and nitrous oxide (N₂O), both of which have strong fundamental absorption bands in this waveband. The sensor is based on tunable diode laser absorption spectroscopy (TDLAS) technology, which combined a multi-pass gas cell (MPGC) with a 41 m optical path length to achieve high-precision detection. Meanwhile, the particle swarm optimization-kernel extreme learning machine (PSO-KELM) algorithm was applied for CO and N₂O concentration prediction. In addition, the self-designed board-level QCL driver circuit and harmonic signal demodulation circuit reduce the sensor cost and size. A ser

SUBMITTER: Li G 

PROVIDER: S-EPMC9333160 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature