| 韩玲,张永明,方俊,王进军,胡海兵.室内火灾烟雾对微波衰减的影响研究[J].火灾科学,2016,25(1):47-52. |
| 室内火灾烟雾对微波衰减的影响研究 |
| Effect of indoor fire smokes on microwave attenuation |
| 投稿时间：2016-01-13 修订日期：2016-02-26 |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| DOI：10.3969/j.issn.1004-5309.2016.01.07 |
| 基金项目:国家自然科学青年基金项目（51304180）；国家自然科学基金联合基金（U1233102） |
|
| 中文关键词: 火灾烟雾 微波衰减 烟雾浓度 频率 衰减因子 |
| 英文关键词:Fire smoke Microwave attenuation Smoke particle number concentration Frequency Attenuation factor |
| 摘要点击次数: 209 |
| 全文下载次数: 360 |
| 中文摘要: |
| 针对建筑室内火灾烟雾环境对微波信号的干扰问题，利用火灾标准实验间和微波实验装置，研究棉绳阴燃、聚氨酯明火等四种典型火灾烟雾对频率分别为600 MHz和2.7 GHz微波衰减特性的影响规律。在有和无火灾烟雾环境下，对比分析入射波频率、烟雾浓度、烟雾类型对微波衰减的影响。实验结果表明，四种火灾烟雾对微波传播有明显衰减，且衰减量均随烟雾浓度的增加而增加，而衰减速率逐渐减小。频率以及不同特性类型的烟雾对微波衰减特性的规律不同。最后，计算并修正了室内火灾烟雾环境下微波衰减因子模型的衰减因子，提高了该模型在火灾烟雾环境下的适用性和准确性。 |
| 英文摘要: |
| To study the disturbance of microwave signal in fire smokes, experiments for microwave propagation with the frequencies of 600 MHZ and 2.7 GHz in fire smokes generated by typical fuels (cottons, polyurethane, n-heptane and diesel) are conducted in the standard fire test room. The objective is to analyze the effect of parameters on microwave attenuation in the fire smoke, including incident wave frequency, smoke particle number concentration and type of smoke. The experimental results show that the microwave attenuation increases obviously with the rising of smoke particle concentration for the typical fire smokes, while the speed of attenuation gradually decreases. Moreover, the microwave attenuation also varies with different frequencies and different characteristics of fire smoke particles. Finally, the attenuation factor value of wireless signal attenuation factor model by building fire smokes is calculated, which enhances the applicability and accuracy of the model in complicated fire environment. |
| 关闭 |
