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Proceedings Paper

Ultrasonic phased array sensor for electric travel aids for visually impaired people
Author(s): Takayuki Takahashi; Ryosuke Takahashi; SeongHee Jeong
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Paper Abstract

An ultrasonic phased array sensor system is developed. The system has high capability on azimuthal resolution and plural obstacles detection, and is considered as a sensing system of an electric travel aids for visually impaired people. The developed phased array consists of multiple sound tubes to avoid the grating lobe problem even if one uses large size of ultrasonic sensor elements. To measure plural obstacles in different direction at one time, we applied a method that uses coded transmitting pulse trains to the phased array transmitter. The method reduces the interference between ultrasonic pulses sent out to different directions, and realizes the simultaneous measurement in multiple directions. Experimental results also shown to verify the performance of the phased array.

Paper Details

Date Published: 9 January 2008
PDF: 6 pages
Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 67943V (9 January 2008); doi: 10.1117/12.783988
Show Author Affiliations
Takayuki Takahashi, Fukushima Univ. (Japan)
Ryosuke Takahashi, Fukushima Univ. (Japan)
SeongHee Jeong, Fukushima Univ. (Japan)


Published in SPIE Proceedings Vol. 6794:
ICMIT 2007: Mechatronics, MEMS, and Smart Materials

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