摘要
将超宽带电磁探测技术引入灾害救助方法技术之中,以充分发挥其穿透障碍物能力强、探测距离大、分辨率高和携带目标信息量丰富等优势。为了研究超宽带电磁波在有障碍物下的探测目标人体的可行性,论文以穿墙探测障碍物后的生命体模型为例,使用时域有限差分方法模拟超宽带电磁波的三维传播过程;给出一个呼吸周期内的人体胸部几个变化状态下的人体回波信号的模拟结果,给出多个状态下的微动信号的加强积分曲线。模拟结果显示了超宽带电磁波能高分辨率地反映墙体与障碍物后面的目标人体,能检测到人体呼吸所致的胸部运动信号,因而超宽带电磁探测技术用于灾害现场生命检测是理论可行的,在穿透墙体及障碍物方面具有独特优势。研究成果为城市灾害以及紧急事件现场生命救助提供了电磁探测方法与数理模拟技术,并为建立一种新型、非接触、有效的灾害救助实用技术打下了基础。
In this paper, detection technology using Ultra Wideband electromagnetic wave is introduced into disaster rescue, so as to give full play to its strong penetrating ability, large detection range, high resolution and rich information of target. In order to study the feasibility of detection of human body behind the obstacle using Ultra Wideband electromagnetic waves, taking the life model behind the obstacle as an example, the three Dimension propagation process of uhra-wideband electromagnetic wave is simulated using finite difference time domain （FDTD） method. The simulations of human body return reflected by different state of chest within a respiratory cycle, and the strengthened integration curves of fretting signal in many different state of chest are given. The results show that Ultra Wideband electromagnetic wave can reflect the human body behind the wall and obstacle with high resolution can detect respiratory signal caused by chest movement. Thus it＇s feasible that ultra-wideband electromagnetic detection technology is used in disaster rescue, and it has a unique advantage in penetrating ability. Research results provide electromagnetic detection method and mathematical simulation technology for the urban disasters and emergency assistance, and lay a foundation for the establishment of a new, non-contact, and effective disaster rescue practical technology.
出处
《地球科学进展》
CAS
CSCD
北大核心
2008年第5期541-545,共5页
Advances in Earth Science
基金
国家自然科学基金项目“城市灾害救助生命搜索的超宽带电磁探测方法研究”(编号:40374027)
国家863计划课题“城市灾害救助生命探索的超宽带电磁探测方法研究”(编号:2006AA06Z110)
国家科技支撑项目(编号:2006BAC13B04)
教育部博士点基金项目“地震灾害生命探索新方法机理研究”(编号:20050616017)资助
