[Experimental study on harmonic detection of methane by use of a digital lock-in amplifier].
Guang Pu Xue Yu Guang Pu Fen Xi
; 25(3): 473-6, 2005 Mar.
Article
em Zh
| MEDLINE
| ID: mdl-16013337
ABSTRACT
The harmonic detection of methane at 6105.3694 cm(-1) was measured by use of a digital lock-in amplifier (SR830) remotely controlled by a computer. The programme was written by Visual Basic 6.0 because it has strong function and a friendly appearance. The experimental results are in agreement with theoretical analysis, which fully confirms that a better signal-to-noise ratio (SNR) can be achieved in the high-harmonics detection of trace gases by the digital lock-in amplifier. The method can be applicable to the highly sensitive detection of pollution gases.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrofotometria
/
Algoritmos
/
Processamento de Sinais Assistido por Computador
/
Metano
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Ano de publicação:
2005
Tipo de documento:
Article