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Differentiating Sonar Reflections from Corners and Planes by Employing an Intelligent Sensor
June 1990 (vol. 12 no. 6)
pp. 560-569

A multitransducer, pulse/echo-ranging system is described that differentiates corner and plane reflectors by exploiting the physical properties of sound propagation. The amplitudes and ranges of reflected signals for the different transmitter and receiver pairs are processed to determine whether the reflecting object is a plane or a right-angle corner. In addition, the angle of inclination of the reflector with respect to the transducer orientation can be measured. Reflected signal amplitude and range values, as functions of inclination angle, provide the motivation for the differentiation algorithm. A system using two Polaroid transducers is described that correctly discriminates between corners and planes for inclination angles within +or-10 degrees of the transducer orientation. The two-transducer system is extended to a multitransducer array, allowing the system to operate over an extended range. An analysis comparing processing effort to estimation accuracy is performed.

[1] H. P. Moravec and A. Elfes, "High resolution maps from wide angle sonar," inProc. IEEE Int. Conf. Robotics Automat., 1985, pp. 116-121.
[2] J. L. Crowley, "Dynamic world modeling for an intelligent mobile robot using rotating ultrasonic ranging device," inProc. IEEE Int. Conf. Robotics Automat., 1985, pp. 128-135.
[3] S. Tachi and K. Komoriya, "Guide dog robot," inProc. Second Int. Symp. Robotics, Kyoto, Japan, 1984.
[4] R. Kuc and M. W. Siegel, "Physically based simulation model for acoustic sensor robot navigation,"IEEE Trans. Patt. Anal. Machine Intell., vol. PAMI-9, pp. 766-778, Nov. 1987.
[5] Ultrasonic Range Finders, Polaroid Corp., 1982.
[6] P. N. T. Wells,Biomedical Ultrasonics. New York: Academic, 1977.
[7] R. C. Weast,CRC Handbook of Chemistry and Physics, 54th ed. Cleveland, OH: Chemical Rubber Co., 1973, p. E49.
[8] R. Kuc and B. Barshan, "Navigating vehicles through an unstructured environment with sonar," inProc. IEEE Int. Conf. Robotics Automat., 1989, pp. 1422-1426.
[9] P. M. Morse and K. U. Ingard,Theoretical Acoustics. New York: McGraw-Hill, 1968.
[10] R. Kuc and Y. D. Di, "Intelligent sensor approach to differentiating sonar reflections from corners and planes," inProc. Int. Congr. Intelligent Autonomous Systems, Amsterdam, The Netherlands, 1986.
[11] M. Schwartz and L. Shaw,Signal Processing. New York: McGraw-Hill, 1975.
[12] A. Elfes and L. Matthies, "Sensor integration for robot navigation: Combining sonar and stereo range data in a grid-based representation," inProc. IEEE Conf. Decision and Control, 1987.
[13] L. W. Johnson, and R. D. Riess,Numerical Analysis. Reading, MA: Addison-Wesley, 1982, pp. 518-523.
[14] D. J. Kriegman, E. Triendl, and T. O. Binford, "A mobile robot: Sensing, planning and locomotion," inIEEE Int. Conf. Robotics Automat., 1987, pp. 402-408.
[15] K.L. Boyer and A.C. Kak, "Color-encoded structure light for rapid range sensing,"IEEE Trans. Pattern Anal. Machine Intell., vol. PAMI-9, no. 1, pp. 14-28, Jan. 1987.

Index Terms:
multitransducer pulse echo ranging system; sonar reflections; corners; planes; intelligent sensor; sound propagation; Polaroid transducers; artificial intelligence; pattern recognition; signal processing; sonar
Citation:
B. Barshan, R. Kuc, "Differentiating Sonar Reflections from Corners and Planes by Employing an Intelligent Sensor," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 12, no. 6, pp. 560-569, June 1990, doi:10.1109/34.56192
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