非谐振式光声腔在火灾探测中的应用

应用科学学报 ›› 2006, Vol. 24 ›› Issue (6): 623-626.

非谐振式光声腔在火灾探测中的应用

蒋亚龙¹, 陈涛², 袁宏永², 张永明¹, 祝玉泉¹, 王进军¹

1. 中国科学技术大学火灾科学国家重点实验室, 安徽合肥 230027;
2. 清华大学公共安全研究中心, 北京 100084

收稿日期:2005-09-12 修回日期:2005-12-06 出版日期:2006-11-30 发布日期:2006-11-30
作者简介:蒋亚龙,博士生,研究方向:火灾探测,E-mail:jiangyl@mail.ustc.edu.cn;袁宏永,教授,博导,研究方向:公共安全,E-mail:hy-guan@tsinghua.edu.cn
基金资助:
国家自然科学基金资助项目(50476023)

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. 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

摘要/Abstract

摘要： 光声技术探测火灾具有很大的优势,而光声腔的设计则是影响其测量结果最为关键的环节之一.文中介绍了非谐振式光声腔在火灾探测中的应用,低频调制波段有利于提高系统的检测信噪比,小的光声腔体积(约为72)则可以缩小整个探测系统的尺寸.测量了棉绳阴燃和酒精明火中CO气体浓度的变化,实验表明,此系统对CO气体浓度的检测灵敏度至少为3×10^-6,表明非谐振式光声腔用于火灾探测是可行的.

关键词: 火灾探测, 非谐振, 光声腔

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

中图分类号:

TN219

蒋亚龙, 陈涛, 袁宏永, 张永明, 祝玉泉, 王进军. 非谐振式光声腔在火灾探测中的应用[J]. 应用科学学报, 2006, 24(6): 623-626.

JIANG Ya-long, CHEN Tao, YUAN Hong-yong, ZHANG Yong-ming, ZHU Yu-quan, WANG Jin-jun. Application of Nonresonant Photoacoustic Cell in Fire Detection[J]. Journal of Applied Sciences, 2006, 24(6): 623-626.