摘要
提出一种新的信号分析方法,即信号的过零率分析法,并对其进行了论证。该方法适用于声引信目标信号分析与识别,可以从背景噪声中识别出直升机、坦克、汽车、人行走等,并能排除风和背景噪声的干扰以及人为干扰。与频谱分析法相比,它不需要进行乘法运算,因而处理速度快,分析结果与信号能量无关。文中给出了应用该方法分析的直升机声音、坦克声音、大型卡车声音、人员行走的震动信号的过零率曲线。利用该方法可以提取目标信号的特征。该方法可以完全用模拟电路实现,因而处理速度快,电路功耗低,适用于声引信的适时信号处理中。
This paper proposes a new signal analyzing method (zero pass rate analyzing method) and demonstrates it.The method is suitable to analyze and identify the target signals of acoustic fuzes. A tank , helicopter large vehicles and human walk can be distinguished by their sounds with the help of the method, which can eliminate the jamming caused by wind and background noises. Compared with a spectrum analyzing method, it has no need of doing multiplication calculations so that faster processing can be done , and its analysis results are independent of signal energy . This paper gives the zero pass rate curves of the vibration signals of the sounds from a helicopter tank , large vehicle and human walk analyzed by using the method, with the help of which ones can extracte the features of the target signals.The method can use analogue circuits to realize its purpose and is suitable to process the signals of the acoustic fuzes in good time.
出处
《探测与控制学报》
CSCD
1999年第4期15-18,共4页
Journal of Detection & Control
关键词
声引信
信号分析
特征抽取
过零率
acoustic fuze
signal analysis
feature extraction
zero passrate
target recognition.