title: A Study of a Handrim-Activated Power-Assist Wheelchair Based on a Non-Contact Torque Sensor.
abstract: Demand for wheelchairs is increasing with growing numbers of aged and disabled persons. Manual wheelchairs are the most commonly used assistive device for mobility because they are convenient to transport. Manual wheelchairs have several advantages but are not easy to use for the elderly or those who lack muscular strength. Therefore, handrim-activated power-assist wheelchairs (HAPAW) that can aid driving power with a motor by detecting user driving intentions through the handrim are being researched. This research will be on HAPAW that judge user driving intentions by using non-contact torque sensors. To deliver the desired motion, which is sensed from handrim rotation relative to a fixed controller, a new driving wheel mechanism is designed by applying a non-contact torque sensor, and corresponding torques are simulated. Torques are measured by a driving wheel prototype and compared with simulation results. The HAPAW prototype was developed using the wheels and a driving control algorithm that uses left and right input torques and time differences are used to check if the non-contact torque sensor can distinguish users' driving intentions. Through this procedure, it was confirmed that the proposed sensor can be used effectively in HAPAW.
authors: Korea Orthopedics & Rehabilitation Engineering Center, 26, Gyeongin-ro 10beon-gil, Bupyeong-gu, Incheon 21417, Korea. ktnam@kcomwel.or.kr.
authors: Ki-Tae
authors: KT
authors: Nam
authors: Korea Orthopedics & Rehabilitation Engineering Center, 26, Gyeongin-ro 10beon-gil, Bupyeong-gu, Incheon 21417, Korea. djjang@kcomwel.or.kr.
authors: Dae-Jin
authors: DJ
authors: Jang
authors: Korea Orthopedics & Rehabilitation Engineering Center, 26, Gyeongin-ro 10beon-gil, Bupyeong-gu, Incheon 21417, Korea. yckim@kcomwel.or.kr.
authors: Yong Chol
authors: YC
authors: Kim
authors: Korea Orthopedics & Rehabilitation Engineering Center, 26, Gyeongin-ro 10beon-gil, Bupyeong-gu, Incheon 21417, Korea. heruni1004@kcomwel.or.kr.
authors: Yoon
authors: Y
authors: Heo
authors: Korea Orthopedics & Rehabilitation Engineering Center, 26, Gyeongin-ro 10beon-gil, Bupyeong-gu, Incheon 21417, Korea. ephong@kcomwel.or.kr.
authors: Eung-Pyo
authors: EP
authors: Hong
mesh_terms: D001696:Biomechanical Phenomena; D015374:Biosensing Techniques / Q000379:methods*; D004867:Equipment Design / Q000295:instrumentation*; D006801:Humans; D008991:Monitoring, Physiologic / Q000379:methods*; D009038:Motion; D014910:Wheelchairs
keywords: assistive technologies; handrim-activated; non-contact torque sensor; power wheelchair