Distance Measurement Method Measurable from 0m Using Phase Interference of Audible Sound
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- Nakasako Noboru
- Faculty of Biology-Oriented Sc. & Tech., Kinki University
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- Shinohara Toshihiro
- Faculty of Biology-Oriented Sc. & Tech., Kinki University
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- Kawanishi Keiji
- Faculty of Biology-Oriented Sc. & Tech., Kinki University
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- Uebo Tetsuji
- Faculty of Biology-Oriented Sc. & Tech., Kinki University WIRE AUTOMATIC DEVICE Co., Ltd.
Bibliographic Information
- Other Title
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- 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
- カ チョウオン ノ イソウ カンショウ オ モチイタ 0m カラ ソクテイ カノウ ナ キョリ ソクテイホウ
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Abstract
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.
Journal
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- IEEJ Transactions on Electronics, Information and Systems
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IEEJ Transactions on Electronics, Information and Systems 132 (11), 1749-1755, 2012
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390282679585215872
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- NII Article ID
- 10031120122
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- NII Book ID
- AN10065950
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- ISSN
- 13488155
- 03854221
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- NDL BIB ID
- 024079429
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed