マイクロホンアレーを用いた送信波と反射波の位相干渉に基づく音響イメージング

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2013/11/01

タイトル(英語): Acoustic Imaging Based on Interference between Transmitted and Reflected Waves using Microphone-array

著者名: 三宅　亮太（立命館大学情報理工学部），中山　雅人（立命館大学情報理工学部／近畿大学生物理工学部），西浦　敬信（立命館大学情報理工学部）

著者名(英語): Ryota Miyake (Colleage of Information Science and Engineering, Ritsumeikan University), Masato Nakayama (Colleage of Information Science and Engineering, Ritsumeikan University/Faculty of Biology-Oriented Science and Technology, Kinki University), Takanobu Nishiura (Colleage of Information Science and Engineering, Ritsumeikan University)

キーワード: 音響イメージング，位相干渉，マイクロホンアレー，指向性制御，複数対象物　　Acoustic imaging，Phase interference，Microphone-array，Beamformer，Multiple targets

要約(英語): Estimating distances and directions of targets in short range is important for achieving hands-free speech interfaces and nursing-care robots. Conventionally, acoustic imaging methods based on time-of-flight (TOF) with ultrasound have been proposed to estimate the distances and directions of targets. However, these methods have difficulty estimating the distances and directions in the short range which has overlaps of the transmitted and reflected waves. Meanwhile, we have proposed the acoustic distance measurement method which can estimate the distances in the short range. Previously proposed method can be estimated the distance and direction of a single target, but cannot estimate that of multiple targets. Therefore, in the present paper, we propose a new acoustic imaging method based on phase interference between transmitted and reflected waves for estimating distances and directions of multiple targets in the short range. More specifically, we calculate range spectrogram by beamforming range spectra calculated from each microphone of the microphone-array. Also, the proposed method performs the distance attenuation normalization and the sidelobe suppression in range spectrogram. Finally, we confirm the validity and the effectiveness of the proposed method through computer simulations and evaluation experiments in a real environment.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.133 No.11 （2013） 特集：電気関係学会関西連合大会

本誌掲載ページ: 2014-2020 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/133/11/133_2014/_article/-char/ja/