Obstacle Searching Method Using a Simultaneous Ultrasound Emission for Autonomous Wheelchairs
A method to locate an obstacle and calculate the distance to it is proposed. The proposed method utilizes multiple ultrasound emitters that generate signals of identical frequencies and intensities. Corresponding sensors detect the reflected ultrasound signals, and the position of the obstacle is calculated based on the time of flight (TOF) of the ultrasound wave. This method is suitable for autonomous wheelchairs as it facilitates detection of the nearest obstacle, and yields more accurate estimation of the position.
KeywordsAssistive Technology Ultrasound Wave Ultrasound Signal Obstacle Detection Close Object
This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2010-013-D00091).
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