2012年
可聴音の位相干渉を用いた0mから測定可能な距離測定法
電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and Systems Society
- ,
- ,
- ,
- 巻
- 132
- 号
- 11
- 開始ページ
- 1749
- 終了ページ
- 1755
- 記述言語
- 日本語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1541/ieejeiss.132.1749
- 出版者・発行元
- The Institute of Electrical Engineers of Japan
In many engineering fields, distance to target is very important information. Typical distance measurement methods use time delay between transmitted and reflected waves, but it is difficult to estimate short distance. On the other hand, a method for measuring short distances using a standing wave, which is generated by phase interference of transmitted and reflected waves, is known in the field of microwave radar. This method is given in a very simple form such that the distance between microphone and target is estimated as a peak value of the range spectrum, which can be obtained by Fourier transform of the power spectrum of the observed wave. However, since the minimum measurable distance depends on the bandwidth of the transmitted wave, the shorter distance measurement requires the wider bandwidth of the transmitted wave. This paper describes a new distance estimation method measurable from 0m based on the phase interference of transmitted and reflected audible sound. More concretely, we introduce an analytic signal instead of the power spectrum and examine the validity and effectiveness of our method by applying it to an actual sound field.
- リンク情報
- ID情報
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- DOI : 10.1541/ieejeiss.132.1749
- ISSN : 1348-8155
- ISSN : 0385-4221
- J-Global ID : 201302259958858270
- CiNii Articles ID : 10031120122
- identifiers.cinii_nr_id : 9000006588111
- SCOPUS ID : 84869421176