利用声音反射信号重建室内空间结构的研究  

Study of indoor room reconstruction by exploiting acoustic reflecting signal

作　　者：李悟 王玫 宋浠瑜[1] 罗丽燕 覃虹菱 LI Wu;WANG Mei;SONG Xiyu;LUO Liyan;QIN Hongling(Provincial Ministry of Education Key Laboratory of Cognitive Radio and Signal Processing,Guilin University of Electronic Technology,Guilin 541004,China;School of information science and engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学认知无线电与信息处理省部共建教育部重点实验室,桂林541004 [2]桂林理工大学信息科学与工程学院,桂林541004

出　　处：《应用声学》2019年第5期894-904,共11页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(61771151);广西自然科学基金项目(2016GXNSFBA38014));桂林电子科技大学研究生优秀学位论文培育项目(16YJPYBS02)

摘　　要：利用声音反射信号重建室内空间结构,实现声源室内定位和房间轮廓构图,越来越受到业界的重视。该文针对现有基于欧式距离阵特性重构室内空间结构的方法得到的结果误差较大的问题,提出一种利用声音信号到达时间差结合最小二乘误差的方法来提取一阶反射信号,利用一阶反射信号到达时间实现对墙壁、天花板、地板等室内主要反射面位置的探测,可以实现在收发无法精准同步状态下房间轮廓的重建。实测结果表明,在2.3m宽×2.37m高的走廊中得到的建图结果平均误差为0.05m,该方法能够满足对空间结构重建的要求,为辅助室内声源定位和房间轮廓构图提供一种更加实用的解决方案。Exploiting acoustic reflected signals to reconstruct indoor room structure, position indoor sound sources and map room contour has been drawing more and more attention from the industry. In this paper, aiming at the problem that the off-the-shelf approach based on Euclidean distance matrices (EDM) method causes large error during the reconstruction process, an approach of extracting first-order reflected signal by using method of the least squares combining with acoustic signal time difference of arrival (TDOA) is proposed. By exploiting first-order reflected signal arrival time, it is available to detect positions of main reflecting surfaces such as walls, ceilings, and floors, which can reach the goal of reconstruction of room contour when sound source and receivers cannot be accurately synchronized. The measured results show that it is possible to reach the goal of reconstruction of a corridor of 2.3 m wide by 2.37 m high with only 0.05 m average error, which shows that this approach can meet the requirements of reconstruction of indoor spaces and provide a more practical solution to offer references for assisting in positioning indoor sources and mapping room contour.

关 键 词：声源定位 室内空间结构重建 信号到达时间差 一阶反射信号 

分 类 号：TB52[理学—物理]