光谱学与光谱分析 |
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Study on Pressure Characteristics of Photoacoustic Spectroscopy and TDLAS |
CHEN Yi-kang1, JU Yu2, HAN Li2 |
1. China Southern Power Grid EHV Transmission Companies Guangzhou Bureau, Guangzhou 510405, China 2. Institute of Electrical Engineering,Chinese Academy of Sciences, Beijing 100190, China |
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Abstract Based on priciples of PAS and TDLAS, relevance between them was dicussed, while the relationships of PAS and TDLAS signal with pressure were derived. A contrast device for making PAS and TDLAS gas detection simultaneously was designed and constructed to test different pressure and provide a reference for the gas measurement technology selection under different pressure conditions. Experimental studies show that: as the pressure rises, PAS and TDLAS signals become larger, and limit detection sensitivity are improved; with the rising pressure, conversion efficiency from energy absorbed by gas to PAS signals becomes low; at low pressure condiction, PAS is a better choice.
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Received: 2015-09-25
Accepted: 2015-12-24
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Corresponding Authors:
CHEN Yi-kang
E-mail: cyk226800@163.com
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