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基于视频监控系统的林火定位算法研究 被引量:6

Study of the localization algorithm for forest fire based on video monitoring system
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摘要 以森林防火瞭望塔视频监控设备为硬件基础,在地理信息技术平台上仅使用单个瞭望塔回传数据进行火点定位算法研究。运用穷举搜索法判断DEM(数字高程模型)图层地形剖面上的火点位置,并根据山区地形多变的特点,使用曲线拟合法得到不同坡度时的搜索步长插值函数。实地试验表明,本自动定位方法的精度可以满足林火监控的实际需求,成为提升我国森林火灾应急指挥管理智能化水平的点睛之笔。 This paper takes as its aim of study the forest fire video monitoring system installed on the watch-towers as the basis of hardware by using a data retrieval technology from the single watch-tower on the geographical information technology platform. As is known, automatic fire spot locating is of great significance to the forest fire control and video monitoring system. Traditionally, a method known as the two-spot inter-junction has been used to locate the fire spot. But it is pity that some areas might be found poorly monitored and controlled simultaneously, which are likely to result in restricted use of the inter-junction method. Therefore, it becomes of a great need to solve the problem of fire spots locating under the condition of a single monitoring spot. In the process of analyzing the locating problem, if the geometrical relation of parameters is given, the required formula of fire spot locating would be easier. For this purpose, we have tried to use the exhaustive search methods to locate the spots on the terrain profile of DEM layer with the help of the search step interpolation function under different slope gradients. Then the curve fitting method can be used to study the changing characteristics of mountain terrain. By taking into full considerations the judgment of fire spot coordinate under various conditions, it would become possible to reach different convergence criteria. Next software programming can be made based on the aforementioned fire spot locating algorithm to collect and input the multiple data spots in DEM into the software to conduct the fire spot locating verification test. Field trials and practical application both show that the accuracy of this method can meet the actual demand for its designated duties and is expected to play an important role in upgrading China' s smart forest fire emergency command and management.
出处 《安全与环境学报》 CAS CSCD 北大核心 2009年第1期127-130,共4页 Journal of Safety and Environment
基金 国家林业局"948"项目(2005-4-04)
关键词 控制理论与控制工程 森林火灾 自动定位 穷举搜索法 曲线拟合 control theory and control engineering forest fire auto-matic positioning exhaustive search methods curve fitting
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