Page 142 - 应用声学2019年第5期

第 38 卷 第 5 期 Vol. 38, No. 5
2019 年 9 月 Journal of Applied Acoustics September, 2019

⋄ 研究报告 ⋄

利用声音反射信号重建室内空间结构的研究 ∗

李 悟 1 王 玫 2 宋浠瑜 1† 罗丽燕 1 覃虹菱 1

(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)

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 2.3 m 宽 ×2.37 m 高的走廊中得到的建图结果平均误差为 0.05 m，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。
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
中图法分类号: TB52 文献标识码: A 文章编号: 1000-310X(2019)05-0894-11
DOI: 10.11684/j.issn.1000-310X.2019.05.020

Study of indoor room reconstruction by exploiting acoustic reflecting signal

LI Wu 1 WANG Mei 2 SONG Xiyu 1 LUO Liyan 1 QIN Hongling 1

(1 Provincial Ministry of Education Key Laboratory of Cognitive Radio and Signal Processing, Guilin University of Electronic
Technology, Guilin 541004, China)
(2 School of information science and engineering, Guilin University of Technology, Guilin 541004, China)

Abstract 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.
Key words Source positioning, Indoor room reconstruction, Time difference of arrival, First-order echoes

2018-09-08 收稿; 2019-04-10 定稿
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)
作者简介: 李悟 (1992- ), 男, 陕西西安人, 硕士研究生, 研究方向: 智能传感与室内定位。
† 通讯作者 E-mail: songxiyu@guet.edu.cn