An optical transceiver design for long-path broadband differential optical absorption spectroscopy

Lee, Joohyung; Song, Kunekwan; Kim, Hongin; Choi, Minsu

doi:10.1109/icsenst.2017.8304454

Cited by 1 publication

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in the DOAS system by using a low order polynomial fitting spectral filtering technique to directly low-pass filter𝐼(𝜆) and thus obtain 𝐼 0 ′ (𝜆). To perform a low-order polynomial fit to obtain the equation [9] ：…”

Section: Spectral Acquisition and Processingmentioning

confidence: 99%

See 1 more Smart Citation

Research on improving the performance of motor vehicle exhaust gas detection system based on DOAS technology

Zhang

Zuo

Liao

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

View full text Add to dashboard Cite

In this paper, the basic principles of differential optical absorption spectroscopy (DOAS) technology are studied in depth, and the architecture of a motor vehicle exhaust gas detection system is built. The simultaneous detection of nitrogen oxides (NOx) and hydrocarbons (HC), the main components of motor vehicle exhaust based on Ultraviolet spectroscopy was achieved. NOx (NO) and HC (1,3-butadiene) in the exhaust of motor vehicles as the object of study. The DOAS detection system is used to obtain the spectral data, calculate the differential absorption spectrum of the gas, invert the concentration of the gas to be measured using the least squares method, and reduce the error of the measured gas concentration value using the nonlinear compensation method. The results show that the accuracy and stability of the testing system is good, and the relative error of the measurement results is within ±10% of the latest national metrology specifications.

show abstract

Section: Spectral Acquisition and Processingmentioning

confidence: 99%

“…Due to the wide range of absorption spectra obtained by the spectrometer, it contains many spectral lines with little information. Therefore, the selected inversion band should satisfy that the gas to be measured has a significant differential absorption structure in the band [9] .…”

Section: Spectral Acquisition and Processingmentioning

confidence: 99%