Applications of wavelets in the photoacoustic detection of trace gases with noisy signals

This paper shows that the use of filters based on the discrete wavelet transform (DWT) improves the sensitivity of photoacoustic systems for measurement of trace gases under conditions of unfavorable signal-to-noise ratio (SNR). To achieve this goal, a filter based on Meyer's DWT was designed a...

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Autores principales: González, Martín Germán, Santiago, Guillermo Daniel, Slezak, Verónica, Peuriot, Alejandro
Formato: Artículo publishedVersion
Lenguaje:Español
Publicado: FIUBA 2018
Materias:
Photoacoustic Spectroscopy
trace gases
wavelets
Espectroscopía fotoacústica
gases traza
Acceso en línea:https://elektron.fi.uba.ar/elektron/article/view/35
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=elektron&d=35_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-35_oai
record_format dspace
spelling I28-R145-35_oai2026-02-11 González, Martín Germán Santiago, Guillermo Daniel Slezak, Verónica Peuriot, Alejandro 2018-05-09 This paper shows that the use of filters based on the discrete wavelet transform (DWT) improves the sensitivity of photoacoustic systems for measurement of trace gases under conditions of unfavorable signal-to-noise ratio (SNR). To achieve this goal, a filter based on Meyer's DWT was designed and tested with simulated and measured signals. For the measurements, a system  for the detection of traces of sulfur hexafluoride in nitrogen using a pulsed CO2 laser was implemented. From the results it was obtained that the use of DWT had a very good performance for signals generated with low laser energies ( < 100 uJ) corrupted with impulsive electromagnetic noise. En este trabajo se muestra que la utilización de filtros basados en la transformada wavelet discreta (DWT) mejora la sensibilidad de sistemas fotoacústicos para medición de gases traza bajo condiciones de relación señal a ruido (SNR) desfavorables. Para lograr este objetivo se diseñó un filtro basado en la DWT de Meyer y se lo probó con senales simuladas y medidas. Para las mediciones se implementó un sistema para la detección de trazas de hexafluoruro de azufre en nitrógeno usando un láser pulsado de CO2. A partir de los resultados se obtuvo que el uso de DWT tuvo un muy buen desempeño para señales generadas con bajas energías láser (< 100 uJ) corrompidas con ruido impulsivo electromagnético. application/pdf text/html https://elektron.fi.uba.ar/elektron/article/view/35 10.37537/rev.elektron.2.1.35.2018 spa FIUBA https://elektron.fi.uba.ar/elektron/article/view/35/39 https://elektron.fi.uba.ar/elektron/article/view/35/152 Derechos de autor 2018 Guillermo Daniel Santiago Elektron Journal; Vol. 2 No. 1 (2018); 26-29 Revista Elektron; Vol. 2 Núm. 1 (2018); 26-29 Revista Elektron; v. 2 n. 1 (2018); 26-29 2525-0159 2525-0159 Photoacoustic Spectroscopy trace gases wavelets Espectroscopía fotoacústica gases traza wavelets Applications of wavelets in the photoacoustic detection of trace gases with noisy signals Aplicación de wavelets en la detección fotoacústica de gases traza con señales ruidosas info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=elektron&d=35_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
language Español
orig_language_str_mv spa
topic Photoacoustic Spectroscopy
trace gases
wavelets
Espectroscopía fotoacústica
gases traza
wavelets
spellingShingle Photoacoustic Spectroscopy
trace gases
wavelets
Espectroscopía fotoacústica
gases traza
wavelets
González, Martín Germán
Santiago, Guillermo Daniel
Slezak, Verónica
Peuriot, Alejandro
Applications of wavelets in the photoacoustic detection of trace gases with noisy signals
topic_facet Photoacoustic Spectroscopy
trace gases
wavelets
Espectroscopía fotoacústica
gases traza
wavelets
description This paper shows that the use of filters based on the discrete wavelet transform (DWT) improves the sensitivity of photoacoustic systems for measurement of trace gases under conditions of unfavorable signal-to-noise ratio (SNR). To achieve this goal, a filter based on Meyer's DWT was designed and tested with simulated and measured signals. For the measurements, a system  for the detection of traces of sulfur hexafluoride in nitrogen using a pulsed CO2 laser was implemented. From the results it was obtained that the use of DWT had a very good performance for signals generated with low laser energies ( < 100 uJ) corrupted with impulsive electromagnetic noise.
format Artículo
publishedVersion
author González, Martín Germán
Santiago, Guillermo Daniel
Slezak, Verónica
Peuriot, Alejandro
author_facet González, Martín Germán
Santiago, Guillermo Daniel
Slezak, Verónica
Peuriot, Alejandro
author_sort González, Martín Germán
title Applications of wavelets in the photoacoustic detection of trace gases with noisy signals
title_short Applications of wavelets in the photoacoustic detection of trace gases with noisy signals
title_full Applications of wavelets in the photoacoustic detection of trace gases with noisy signals
title_fullStr Applications of wavelets in the photoacoustic detection of trace gases with noisy signals
title_full_unstemmed Applications of wavelets in the photoacoustic detection of trace gases with noisy signals
title_sort applications of wavelets in the photoacoustic detection of trace gases with noisy signals
publisher FIUBA
publishDate 2018
url https://elektron.fi.uba.ar/elektron/article/view/35
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=elektron&d=35_oai
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