摘要
针对爆炸试验中冲击波超压传感器位置定位的问题,采用陆上实时主动声定位系统对爆炸试验中冲击波超压传感器位置进行定位。系统中对主动发出声信号频率为已知特定几种频率之一的单频信号的快速实时频率检测,提出了一种快速频率检测算法。算法充分利用信号频率为已知特定几种频率之一这一特定条件,并结合离散时间傅里叶变换(DTFT)与离散傅里叶变换(DFT)的关系以及帕塞瓦尔定理,得出快速频率检测的表达式。经实验验证和计算分析,算法检测频率精准可靠,计算量比其他快速测频算法小得多,更适用于军事紧急状态下陆上实时主动声定位中主动发声和实时定位条件下的快速测频。
Based on the position of shock wave overpressure sensor in explosion test,the land real time active acoustic positioning system is used to locate the shock wave overpressure sensor.In this system,a fast and real time frequency detection method is proposed for the fast and real time detection of the spread actively single frequency signal,which is one of several particular frequencies.This algorithm makes full use of the specific conditions that signal frequency is one of known specific several frequencies and combines DTFT,DFT and Parseval theorem to derive the expression of fast frequency estimation.According to analyses and experiments,the algorithm is accurate and reliable,whose computation is much smaller than other fast frequency estimation algorithm,and is suitable for fast frequency estimation of real-time active acoustic positioning on the land during military emergency.
出处
《应用声学》
CSCD
北大核心
2017年第1期41-47,共7页
Journal of Applied Acoustics
基金
国防重点实验室基金(9140c12040051010)
关键词
快速频率估计
离散傅里叶变换
特定几种频率
单频信号
实时主动声定位
Fast frequency estimation
DFT
Specific several frequencies
Single frequency signal
Real-time active acoustic positioning
