2006, Volume 8, Issue 8
Strategic Study of CAE >> 2006, Volume 8, Issue 8
The Fire Detection Technology of Multiple Gases Based on Photoacoustic Principle
1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
2. Center for Public Safety Studies of Tsinghua University, Beijing 100084, China
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Abstract
Smoke particles and heat will be generated in fire , conventional fire detectors detect fire just by these physical effects. But the measurement of physical parameters is not enough for an early fire detection. Nowadays another method has been an area of major interest for early fire dtection which make use of the gases (for example CO) generated from combustion process to detect fire. A majority of existing gas sensors are not good for a early fire detection because of their low sensitivity. A detection method for measuring the gas concentration based on photoacoustic principle is reported in this work, which increased the sensitivity enomously. The rate of false alarm is decreased greatly also by combining carbon monoxide detection with carbon dioxide detection.
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References
[ 1 ] Nebiber P W, Pleisch R E.Photoacoustic gas detection forfire warning[J].Fire Safety Journal, 2001, 36:173~180
[ 2 ] Hagen B, Milke J A.The use of gaseous fire signatures asa means to detect fires[J].Fire Safety Journal, 2000, 34:55~67
[ 3 ] Chen Tao, Su Guofeng, Yuan Hongyong.In situ gas filtercorrelation:photoacoustic CO detection method for firewarning[J].Sensors and Actuators B, 2005.109:233~237
[ 4 ] Kreuzer L B, Patel C K N.Nitric oxide air pollutiondetection by optoacoustic spectroscopy[J].Science, 1971, 173:45~47
[ 5 ] Kreuzer L B.Ultralow gas concentration infrared absorptionspectroscopy[J].Journal of Applied Physics, 1971, 42:2934~2943
[ 6 ] 殷庆瑞, 王通, 钱梦.光声光热技术及其应用[M].北京:科学出版社, 1999.12~17 link1
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