摘要
针对现有船舶轴频电场检测均未考虑雷电信号对其影响,实测了因雷电引起的1～10Hz频段内的水下电场信号,总结了该信号的特征,并分析了其对船舶轴频电场检测算法的影响.提出通过调整轴频电场检测算法中数据窗时间长度、滑动数据窗的时间间隔和特征值大于门限值的持续时间来消除雷电信号对船舶轴频电场检测算法的影响.通过对实测船舶轴频电场和雷电信号的验证表明,该方法行之有效.
To solve the problem that the current detection algorithms for ship shaft-rate electric field signal are without the influence of thunderbolt,the research on influence of thunderbolt on the algorithms has been made in this paper.First,the thunderbolt signal during the frequency band in 1～10Hz is measured and analyzed.Then,the influence of thunderbolt signal on detection algorithm for ship shaft-rate electric field signal is analyzed.Finally,three parameters are proposed to be adjusted to eliminate the impact of thunderbolt signal on detection algorithm for ship shaft-rate electric field signal which contain the length of data window,the interval of neighboring data window and the time when the eigenvalue is larger than the threshold.The effectiveness of the solution is verified by the measured the ship shaft-rate electric field signal and the thunderbolt signal and results show that it is effective.
出处
《武汉理工大学学报（交通科学与工程版）》
2014年第3期626-629,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国防基金项目资助(批准号:5144407105JB11)
关键词
船舶轴频电场
雷电信号
检测算法
影响
ship shaft-rate electric field
thunderbolt signal
detection algorithm
influence
