JRM Vol.16 No.3 pp. 333-341
doi: 10.20965/jrm.2004.p0333


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

October 20, 2003
December 5, 2003
June 20, 2004
spread spectrum, ultrasonic sound wave, range measurement, global positioning system

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:
Akio Yamane, Taketoshi Iyota, Yongwoon Choi,
Yuzuru Kubota, and Kazuhiro 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.
Data files:
  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
  11. [11] M. Yokoyama, “Supekutoru Kakusan Tsuushin Shisutemu in Japanese,” ISBN:487653005X, 423, Science Press, Inc.
  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.

*This site is desgined based on HTML5 and CSS3 for modern browsers, e.g. Chrome, Firefox, Safari, Edge, Opera.

Last updated on Feb. 25, 2021