基于LabVIEW的地下震源定位系统设计

针对小区域浅层地下震源定位中,由于震动信号受传输介质复杂、传感器不稳定等因素影响,出现初至波提取困难、震源定位低精度等问题,设计了基于LabVIEW的地下震源定位系统,实现三轴信号合成、基于小波变换的阈值去噪、基于改进的长短时窗(STA/LTA)的初至提取、基于时差技术(TDOA)的联合定位算法等功能模块。结果表明,该软件在10 m×10 m×3 m的区域内,初至特征提取精确到10-4s,定位精度精确到0.1 m,可以广泛应用于爆破定位、信息侦查等领域。

Underground Source Localization System Based on LabVIEW

Aiming at the problem of primary wave extraction difficulty and low accuracy of positioning in small area of shallow underground source localization,a kind of underground source localization system based on LabVIEW is designed due to the complexity of transmission media and the instability of sensors,which completes some functions,such as the synthesis of three-axis signals、threshold denoising function based on wavelet transform、the extraction of characteristic based on STA/LTA algorithm and the joint source localization based on TDOA technology. Results show that the software system can extract the first arrival time to 10- 4 s accuracy and the positioning accuracy with 0.1 m in 10 m ×10 m ×3 m area. It can be effectively applied in blasting positioning、information investigation and so on.