摘要
提出了分布式光纤温度传感系统(DTS)时空温度场小波分析方法,完成了监测系统报警算法的设计;应用该算法,对隧道内弱风和强风条件下的模拟实验隧道火灾时空温度场进行了瞬态识别;基于隧道温度场监测数据时空矩阵的提取,对隧道的温度场变化规律做出了分析,并选取Ribo3.7小波基成功识别出隧道火灾时空温度场的奇异点。实验结果表明,基于小波分析定位隧道时空温度场奇异点是一种有效的隧道火灾报警方法。
A wavelet analysis method using DTS for space-time temperature field of tunnel fire is developed in this paper,and the algorithm for tunnel fire alarm is proposed.Two cases of fire simulation experiments in a tunnel were performed for temperature field to be monitored in real time.One is with a low-speed wind and the other is with a high-speed wind.According to the space-time matrix obtained in both cases, the development behavior of tunnel temperature field in fire is then analyzed.The wavelet base Ribo 3.7 is selected to successfully identify the singular point of the temperature field of the tunnel in fire.The test results show that locating singular point of tunnel space-time temperature field using wavelet analysis method is effective for tunnel fire alarming.
出处
《防灾减灾工程学报》
CSCD
2011年第1期63-67,84,共6页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(40902076)
教育部博士点基金项目(20090091120044)资助
关键词
隧道火灾
小波分析
温度场
奇异点
tunnel fire
wavelet analysis
temperature field
singular point
