基于粒子滤波的液态场环境声源定位方法  

Acoustic Source Localization Based on Particle Filter in Confined Underwater Space

作　　者：徐耀松[1,2] 李一博[1] 靳世久[1] 

机构地区：[1]精密测试技术及仪器国家重点实验室(天津大学),天津300072 [2]辽宁工程技术大学电气与控制工程学院,葫芦岛125105

出　　处：《纳米技术与精密工程》2012年第5期434-438,共5页Nanotechnology and Precision Engineering

基　　金：国家自然科学基金面上资助项目(2011B1-0089);天津市应用基础及前沿技术研究计划资助项目(09JCYBJC02200)

摘　　要：研究了石油储罐罐底腐蚀声发射源的定位方法.针对有限空间液态场中水声信号的多途效应严重影响声源目标定位问题,提出一种基于粒子滤波的到达时间差(TDOA)声源定位方法,充分考虑广义互相关结果中多途效应导致的多个峰值,采用高斯似然函数进行重要性采样,实现对多途效应影响的抑制.水池实验结果表明这种方法比传统的Chan方法具有更高的定位准确性和精度,定位结果的均方根误差(RMSE)为Chan方法的10%,提高了定位性能.The location method of acoustic emission source in tank bottom corrosion was studied. Multipath propagation of acoustic signal is inevitable and can severely affect the accuracy of source local- ization in confined underwater space. To solve the problem, a location method based on particle filter and time difference of arrival （TDOA） was proposed. The multi-peaks of generalized cross-correlation due to muhipath were considered. Gaussian likelihood function was developed to perform importance sam- piing. The experimental results in test tank show that the proposed method can mitigate multipath and im- prove localization performance. The proposed method outperforms Chan method in accuracy and precision. The root-mean-square error（RMSE） of the proposed method is 10% of Chan method.

关 键 词：声发射 定位 粒子滤波 到达时间差 广义互相关 

分 类 号：TN912.3[电子电信—通信与信息系统]