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用于地震预警系统的单台站防误触发算法研究

DOI: 10.13577/j.jnd.2015.0204, PP. 23-31

Keywords: 地震预警,强震观测,防误触发,波形特征,决策树

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Abstract:

利用单台站的信息在较短的时间内识别地震事件和干扰事件是地震预警系统面临的关键问题.研究了基于波形特征参数的决策树方法来提高地震预警系统的单台抗干扰能力.为了研究电磁干扰对地震预警系统的影响,进行了7种电磁干扰试验.使用事件触发后3s内的波形数据提取5个特征(事件结束否、Speed、Sparse、Pration、对称性),用决策树建立了特征值和事件类型之间的映射关系.使用了大量的强震记录和干扰记录(6359条强震记录、163条干扰记录)对训练后的决策树进行了验证.结果表明,所提方法识别率高,易转换成IF-THEN规则,能方便地写到计算机程序或专家系统中.该算法可以作为地震预警或报警系统的前端地震事件检测模块,以提高系统的可靠性.

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