Wheelchair Clearance Measurement DeviceBy Kim, Yoonho; Sanadi, Hasan Wan Ahmad; Nik Hashim, Nik Nur Wahidah; Lankford, Christopher; NSF 2009 Engineering Senior Design Projects to Aid Persons With Disabilities, pages 368-369
Publication Date: 2011
Paper outlines the development of a prototype proximity detection alarm system for power wheelchairs used by children. The system was designed by students in the Department of Biomedical Engineering at Vanderbilt University to enhance the safety of pediatric wheelchair users, including those who are unable to pilot wheelchairs without some assistance. The design implements the GERAFLAG Parking Sensor System, which uses four ultrasound sensors and is able to detect objects in the range of 0.3 to 1.5 meters. Modifications of this system include an output of two different sounds which correspond to detection on the left and on the right. As an object approaches, the system engages and beeps with higher pulse frequency when the object is closer. Future modifications to the system discussed include an automatic override of wheelchair power in case of an imminent crash.
Published by: Creative Learning Press, Inc. (Website:http://www.creativelearningpress.com)
Link to text: http://nsf-pad.bme.uconn.edu/2009/CHAPTER%2022%20VANDERBILT%20UNIVERSITY.pdf