基于不对称比的火灾烟雾探测器散射角优化

doi:10.16265/j.cnki.issn1003-3033.2022.04.016

中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (4): 107-112.doi: 10.16265/j.cnki.issn1003-3033.2022.04.016

基于不对称比的火灾烟雾探测器散射角优化

施志成(), 周勇^**(), 程旭东

中国科学技术大学火灾科学国家重点实验室,安徽合肥 230026

收稿日期:2022-01-12 修回日期:2022-03-18 出版日期:2022-04-28
通讯作者:
^** 周勇(1980—),男,安徽铜陵人,博士,工程师,主要从事火灾烟雾探测及电力系统防火方面的研究。E-mail: yongz@ustc.edu.cn。
作者简介:
施志成 (1996—),男,江西上饶人,硕士研究生,研究方向为火灾烟雾探测、火灾动力学。E-mail: shizc@mail.ustc.edu.cn。
程旭东, 副教授。

Optimization of scattering angle for fire smoke detectors based on asymmetry ratio

SHI Zhicheng(), ZHOU Yong^**(), CHENG Xudong

State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei Anhui 230026, China

Received:2022-01-12 Revised:2022-03-18 Published:2022-04-28

摘要/Abstract

摘要：

为提升基于不对称比的火灾烟雾探测器的性能,优化散射角,通过对火灾烟雾粒径信息的收集,建立光散射物理模型,再采用离散偶极子近似(DDA)方法,计算一定粒径分布火灾烟雾的散射光强角分布,探讨颗粒形貌和尺寸参数对于散射特征的影响。计算结果表明:散射光强随观察角的增加在整体上呈现先下降后上升的趋势,散射光强最小值对应的角度随尺寸参数变化;基于不对称比的烟雾探测器散射角的优化设计关键在于后向散射角的选取,当尺寸参数较小时,后向散射角应选择110°,当尺寸参数较大时,后向散射角应选择135°。

关键词: 不对称比, 烟雾探测器, 散射角, 离散偶极子近似(DDA), 烟雾颗粒

Abstract:

In order to improve performance of smoke detectors based on asymmetric ratio, scattering angle was optimized, and a light scattering physical model was established based on collected particle size information of fire smoke. Then, angular distribution of scattered light intensity was calculated with a certain particle size distribution by using DDA method, and influence of particle morphology and size parameter on scattering characteristics was discussed. The results show that scattered light intensity decreases first and then rises as observation angle increases, and the angle corresponding to the minimum intensity value changes withe size parameter. The key to optimize scattering angle design of smoke detectors based on asymmetry ratio lies in the selection of back-scattering angle which should be 110° when size parameter is small and 135° when the parameter is large.

Key words: asymmetric ratio, smoke detector, scattering angle, discrete dipole approximation (DDA), smoke particle

施志成, 周勇, 程旭东. 基于不对称比的火灾烟雾探测器散射角优化[J]. 中国安全科学学报, 2022, 32(4): 107-112.

SHI Zhicheng, ZHOU Yong, CHENG Xudong. Optimization of scattering angle for fire smoke detectors based on asymmetry ratio[J]. China Safety Science Journal, 2022, 32(4): 107-112.

图/表 9

图1

图2

图3

图4

图5

图6

图7

图8

图9

参考文献 13

[1]	何永勃, 张文杰, 杨伟, 等. 飞机货舱复合烟雾探测方法研究[J]. 中国安全科学学报, 2019, 29(1): 43-48. doi: 10.16265/j.cnki.issn1003-3033.2019.01.008
	HE Yongbo, ZHANG Wenjie, YANG Wei, et al. Research on multi-sensor smoke detection method for aircraft cargo compartment[J]. China Safety Science Journal, 2019, 29(1): 43-48. doi: 10.16265/j.cnki.issn1003-3033.2019.01.008
[2]	何永勃, 董玉珊, 雷建, 等. 飞机货舱火灾多传感器探测方法研究[J]. 中国安全科学学报, 2018, 28(5): 74-79. doi: 10.16265/j.cnki.issn1003-3033.2018.05.013
	HE Yongbo, DONG Yushan, LEI Jian, et al. Research on multi-sensor method for detecting aircraft cargo fire[J]. China Safety Science Journal, 2018, 28(5):74-79. doi: 10.16265/j.cnki.issn1003-3033.2018.05.013
[3]	WEINERT D W, CLEARY T G, MULHOLLAND G W, et al. Light scattering characteristics and size distribution of smoke and nuisance aerosols[C]. Fire Safety Science:Proceedings of the 7^th International Symposium, 2003: 209-220.
[4]	刘博. 火灾烟雾与典型干扰气溶胶颗粒识别技术研究[D]. 大连: 大连理工大学, 2008.
	LIU Bo. The recognition of fire smoke and typical interferential aerosol particle[D]. Dalian: Dalian University of Technology, 2008.
[5]	乔利锋. 火灾烟颗粒偏振光散射特征的研究[D]. 合肥: 中国科学技术大学, 2008.
	QIAO Lifeng. Research on polarized light scattering characteristics of fire smoke particles[D]. Heifei: University of Science and Technology of China, 2008.
[6]	郑荣. 基于不对称比的飞机货舱抗干扰烟雾探测技术研究[D]. 合肥: 中国科学技术大学, 2020.
	ZHENG Rong. Study on low false-alarm smoke detection technology based on asymmetry ratio for aircraft cargo compartment[D]. Heifei: University of Science and Technology of China, 2020.
[7]	PURCELL E M, PENNYPACKER C R. Scattering and absorption of light by nonspherical dielectric grains[J]. Astrophysical Journal, 1973, 186(2):705-714. doi: 10.1086/152538
[8]	DRAINE B T, GOODMAN J. Beyond clausius-mossotti-wave propagation on a polarizable point lattice and the discrete dipole approximation[J]. Astrophysical Journal, 1993, 405: 685-697. doi: 10.1086/172396
[9]	JONES A R. Light scattering for particle characterization[J]. Progress in Energy and Combustion Science, 1999, 25: 1-53. doi: 10.1016/S0360-1285(98)00017-3
[10]	疏学明, 方俊, 申世飞, 等. 火灾烟雾颗粒凝并分形特性研究[J]. 物理学报, 2006, 55(9): 4466-4471.
	SHU Xueming, FANG Jun, SHEN Shifei, et al. Study on fractal coagulation characteristics of fire smoke particles[J]. Acta Physica Sinica, 2006, 55(9): 4466-4471. doi: 10.7498/aps.55.4466
[11]	KLUSEK C, MANICKAVASAGAM S M, MENGUC P. Compendium of scattering matrix element profiles for soot agglomerates[J]. Journal of Quantitative Spectroscopy & Radiative Transfer, 2003, 79/80: 839-859.
[12]	CHAKRABARTY R K, MOOSMULLER H, CHEN L-W A, et al. Brown carbon in tar balls from smoldering biomass combustion[J]. Atmospheric Chemistry and Physics, 2010, 10(13): 6363-6370.
[13]	邓田. 基于双波长的多参数火灾探测方法研究[D]. 武汉: 华中科技大学, 2017.
	DENG Tian. Multi-parameter fire detection method based on dual wavelengths[D]. Wuhan: Huazhong University of Science and Technology, 2017.

基于不对称比的火灾烟雾探测器散射角优化

Optimization of scattering angle for fire smoke detectors based on asymmetry ratio

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 9

参考文献 13

相关文章 1

编辑推荐

Metrics

本文评价