NDLI: Multiple Acoustical Holography Method for Localization of Objects in Broad Range using Audible Sound

Content Provider	IEEE Xplore Digital Library
Author	Niwa, H. Ogata, T. Komatani, K. Okuno, H.G.
Copyright Year	2006
Description	Author affiliation: Graduate Sch. of Informatics, Kyoto Univ. (Niwa, H.; Ogata, T.; Komatani, K.; Okuno, H.G.)
Abstract	This paper describes a new acoustic localization method using audible sound, which can be applied over a broader range of search directions. In the field of robotics, most conventional indoor localization systems based on sonar range finders use ultrasound to obtain a highly accurate distance. Because ultrasound has high directivity, many measurements are required to localize objects in a large space. To achieve localization with one-time measurement, we use audible sounds. We then calculate an intensity field of the reflection sound to estimate object positions. Although acoustical holography (AH) is a well-known technique to do this, it has problems in that it generates false images. We propose multiple AH (MAH) to solve this problem. The method is used to divide a measurement plane into sub-planes and to apply AH to each sub-plane. By integrating the results of applying AH to the sub-planes, false images can be suppressed because the positions of the false images differ depending on the position of the sub-plane. In addition, we use multiple frequencies to advance an accuracy of the localization based on MAH in a real environment. We constructed a localization system with only one speaker and a microphone array. In both simulation and actual experiments, we confirmed that MAH was effective method for the suppression of false image and could be used within the range of an angle view of 120 deg
Starting Page	1145
Ending Page	1150
File Size	6428970
Page Count	6
File Format	PDF
ISBN	1424402581
DOI	10.1109/IROS.2006.281844
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-09
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Holography Acoustic measurements Ultrasonic imaging Ultrasonic variables measurement Microphone arrays Orbital robotics Sonar measurements Extraterrestrial measurements Acoustic reflection Image generation Acoustical holography Indoor localization Audible sound Multisensor processing
Content Type	Text
Resource Type	Article

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