Ultrasonic phased array sensor for electric travel aids for visually impaired people

Takayuki Takahashi; Ryosuke Takahashi; SeongHee Jeong

doi:10.1117/12.783988

9 January 2008 Ultrasonic phased array sensor for electric travel aids for visually impaired people

Takayuki Takahashi, Ryosuke Takahashi, SeongHee Jeong

Proceedings Volume 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials; 67943V (2008) https://doi.org/10.1117/12.783988
Event: ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 2007, Gifu, Japan

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.

Citation Download Citation

Takayuki Takahashi, Ryosuke Takahashi, and SeongHee Jeong "Ultrasonic phased array sensor for electric travel aids for visually impaired people", Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 67943V (9 January 2008); https://doi.org/10.1117/12.783988

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