中文

Journal of Applied Sciences ›› 2006, Vol. 24 ›› Issue (6): 623-626.

• Articles • Previous Articles     Next Articles

Application of Nonresonant Photoacoustic Cell in Fire Detection

JIANG Ya-long1, CHEN Tao2, YUAN Hong-yong2, ZHANG Yong-ming1, ZHU Yu-quan1, WANG Jin-jun1   

  1. 1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;
    2. Center for Public Safety Studies, Tsinghua University, Beijing 100084, China
  • Received:2005-09-12 Revised:2005-12-06 Online:2006-11-30 Published:2006-11-30

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Abstract: The photoacoustic technology has great advantage in fire detection.Design of photoacoustic cell is a key factor affecting the measurement results.This paper introduces application of nonresonant photoacoustic cell in fire detection. The environmental disturbance has less influence on the measurement results due to low modulation frequency.Small photoacoustic cells (approx.1 cm3) can reduce the dimension of the whole detection system.Changes in carbon monoxide concentration in a smolding cotton fire and flaming spirits fire are measured.The results indicate that nonresonant photoacoustic cell has a better performance in fire detection.

Key words: fire detection, nonresonant, photoacoustic cell

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