A Study on Propagation Characteristics of Spread Spectrum Sound Waves Using a Band-Limited Ultrasonic Transducer

Akio Yamane; Taketoshi Iyota; Yongwoon Choi; Yuzuru Kubota; Kazuhiro Watanabe

doi:10.20965/jrm.2004.p0333

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JRM Vol.16 No.3 pp. 333-341

doi: 10.20965/jrm.2004.p0333

(2004)

Paper:

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A Study on Propagation Characteristics of Spread Spectrum Sound Waves Using a Band-Limited Ultrasonic Transducer

Akio Yamane, Taketoshi Iyota, Yongwoon Choi,
Yuzuru Kubota, and Kazuhiro Watanabe

Faculty of Engineering, Soka University, 1-236 Tangi, Hachioji, Tokyo 192-8577, Japan

Received:

October 20, 2003

Accepted:

December 5, 2003

Published:

June 20, 2004

Keywords:

spread spectrum, ultrasonic sound wave, range measurement, global positioning system

Abstract

Propagation characteristics and range experiments of spread spectrum 40kHz ultrasonic waves have been explored under band-limited frequency. Comparative experiments were conducted using two arrangements combining a broadband speaker and a microphone for the broadband case, and an all-purpose receiving transducer and the broadband speaker for the band-limited case. Under the broadband condition, range accuracy measurements and evaluation of signal discrimination in a code division multiple transmission were made demonstrating 0.034% (corresponding to about 7mm in range distance) of range accuracy for a full-scale distance of 21.6m, demonstrating high signal discrimination. The severely band-limited experiment improved accuracy from 0.084% for a distance of 8.4m to 0.063% for a greater distance of 14.4m using a longer M-sequence length by extending shift registers from 10-bit to 15-bit. These experimental results show promise in the intended application of ultrasonic spread spectra to local positioning systems.

Cite this article as:

A. Yamane, T. Iyota, Y. Choi, Y. Kubota, and K. Watanabe, “A Study on Propagation Characteristics of Spread Spectrum Sound Waves Using a Band-Limited Ultrasonic Transducer,” J. Robot. Mechatron., Vol.16 No.3, pp. 333-341, 2004.

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References

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This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.

[1] [1] J. Borenstein, and Y. Koren, “Noise Rejection for Ultrasonic Sensors in Mobile Robot Applications,” Proc. of the 1992 IEEE Int. Conf. on Robotics and Automation, pp. 1727-1732, 1992.

[2] [2] T. Tanzawa, N. Kiyohiro, and H. Mori, “Ultrasonic Range finder with Cross-Correlation for Outdoor Mobile Robots,” JRSJ, Vol.15 No.4, pp. 542-549, 1997.

[3] [3] A. Yamane, T. Iyota, Y. Choi, Y. Kubota, and K. Watanabe, “Range Measurements using Spread Spectrum Sound Waves modulated with Pseudo Random Msequences,” T.SICE, Vol.39 No.10, pp. 879-886, 2003.

[4] [4] Y. Fukayama et al., “On Signal Processing and Testing Wave for Acoustic Gas Temperature and Flow Measurement,” T.SICE, Vol.37 No.1, pp. 21-29, 2001.

[5] [5] S. Wadaka et al., “Pulse Compression Ultrasonic Nondestructive Testing Using Complementary Series Phase Modulation,” IEICE, US87-27, pp. 15-22, 1989.

[6] [6] Y. Tanada et al., “An Ultrasound Detection and Ranging System Using Real Orthogonal Pseudonoise Sequence,” IEICE, SS87-27, pp. 63-71, 1987.

[7] [7] H. Hachiya, S. Ohtsuki, and M. Okujima, “Observation of multipath propagation at Sagami Bay using M-sequence acoustical signal,” MASJ, Vol.17 No.2, pp. 106-113, 1990.

[8] [8] K. Endoh, Y. Yamazaki, and T. Itow, “Grasp and Development of Spatial Information in a Room by Closely Located Four Point Microphone Method,” MASJ, AA-85-21, pp. 1-8, 1985.

[9] [9] M. L. Hong, and L. Kleeman, “A Low Sample Rate 3D Sonar Sensor for Mobile Robots,” 1995 Int. Conf. on RA, pp. 3015-3020, 1995.

[10] [10] Nihon Sokuchi Gakkai, “GPS -Jinkou Eisei ni yoru Seimitsu Sisutemu- in Japanese,” 26, Japanese Association of Surveyors
(http://www.jsurvey.jp/)
1989.

[11] [11] M. Yokoyama, “Supekutoru Kakusan Tsuushin Shisutemu in Japanese,” ISBN:487653005X, 423, Science Press, Inc.
(http://www.kagaku.co.jp/)
1988.

[12] [12] Toranjisuta Gijutsu Henshubu, “Denpa ni yoru Musendeta Densou Gijutsu Bijaku Denpa/Tokutei SyouDenryoku niyoru De-taDensou kara SupekutoruKakusan made in Japanese,” ISBN:4789834263, CQ Publishing Co.
(http://www.cqpub.co.jp/)
1999.

A Study on Propagation Characteristics of Spread Spectrum Sound Waves Using a Band-Limited Ultrasonic Transducer

Akio Yamane, Taketoshi Iyota, Yongwoon Choi, Yuzuru Kubota, and Kazuhiro Watanabe

Akio Yamane, Taketoshi Iyota, Yongwoon Choi,
Yuzuru Kubota, and Kazuhiro Watanabe