| 李悟,王玫,宋浠瑜,罗丽燕,覃虹菱.利用声音反射信号重建室内空间结构的研究*[J].,2019,38(5):894-906 |
| 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 |
| 投稿时间：2018-09-08 修订日期：2019-09-05 |
| 中文摘要: |
| 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室内建图，越来越受到业界的重视。本文针对现有基于image模型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TDOA（Time Difference of Arrival）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空间结构的重建。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的重建的要求，为辅助室内声源定位和室内建图提供一种更加实用的解决方案。 |
| 英文摘要: |
| Exploiting acoustic reflecting signals to reconstruct indoor room structure，position indoor sound sources and map room geometry 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 image model causes large error during the reconstruction process, an approach of extracting first-order reflecting signal by using method of the least squares combining with acoustic signal Time Difference of Arrival (TDOA) is proposed. By exploiting first-order reflecting 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 structure 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 sound sources and mapping room geometry. |
| DOI：10.11684/j.issn.1000-310X.2019.05.020 |
| 中文关键词: 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 |
| 英文关键词: source positioning, indoor room reconstruction,TDOA, first-order echoes |
| 基金项目:国家自然科学基金项目(61771151)，广西自然科学基金（2016GXNSFBA38014），桂林电子科技大学研究生优秀学位论文培育项目(16YJPYBS02) |
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| 摘要点击次数: 1984 |
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