Abstract

This paper addresses the placement strategy of ultrasonic sensors to be embedded into a long cane to serve as an electronic aid for the visually impaired. The strategy is based on performance measures for overhanging obstacle detection, which include detectable spatial zone, measurement accuracy, and long cane dynamics. A finite element analysis has been performed to simulate the vibratory response of a long cane with embedded sensors. Experiments have been conducted to verify the analytically derived results. The study provided insight for an optimized structural design of a new type of sensor-embedded long cane that can be used as an effective electronic travel aid for the blind.

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