基于LabView的爆破振动信号HHT分析  

THE HHT ANALYSIS OF BLASTING VIBRATION SIGNAL BASED ON THE LABVIEW

作　　者：关晓磊[1] 颜景龙 张洪才[3] 

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051 [2]中国兵器工业系统总体部,北京100089 [3]北京理工大学机电学院,北京100081

出　　处：《工程爆破》2012年第4期27-32,共6页Engineering Blasting

摘　　要：HHT作为分析非平稳随机信号的新方法,一般采用Matlab平台进行仿真研究,而应用到实践的情况很少。为了将HHT分析从研究阶段应用到爆破工程实践中,采用LabView平台进行了实现。在程序设计中采用了最新的改进措施,诸如极值点对称延拓、筛选局部终止准则、AM-FM分解。最终通过构造三维时频谱解释信号特征,从能量分布角度更加科学地解释爆破振动信号的特点。The HHT, a new method to analyze the nonstationary random signal, was commonly used in simulation research on Matlab platform, but was rarely applied into practice. In order to put the HHT a- nalysis from the research into the practice of blasting engineering, the LabView platform was used to a- chieve. The latest improvement measures were used in the program design, such as the symmetric extension based on extreme point, the termination criterion of local screening, AM-FM decomposition. Ultimately, the signal characteristics could be explained through constructing the three-dimensional time-frequency spectrum, and the features of blasting vibration signal could be more scientifically expounded from energy distribution.

关 键 词：希尔伯特-黄变换(HHT) LABVIEW 爆破振动 时频谱 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]