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A prototype power assist wheelchair that provides for obstacle detection and avoidance for those with visual impairments
BACKGROUND: Almost 10% of all individuals who are legally blind also have a mobility impairment. The majority of these individuals are dependent on others for mobility. The Smart Power Assistance Module (SPAM) for manual wheelchairs is being developed to provide independent mobility for this population. METHODS: A prototype of the SPAM has been developed using Yamaha JWII power assist hubs, sonar and infrared rangefinders, and a microprocessor. The prototype limits the user to moving straight forward, straight backward, or turning in place, and increases the resistance of the wheels based on the proximity of obstacles. The result is haptic feedback to the user regarding the environment surrounding the medicare power wheelchairs. RESULTS: The prototype has been evaluated with four blindfolded able-bodied users and one individual who is blind but not mobility impaired. For all individuals, the prototype reduced the number of collisions on a simple navigation task. CONCLUSION: The prototype demonstrates the feasibility of providing navigation assistance to manual wheelchair users and medical scooters, but several shortcomings of the system were identified to be addressed in a second generation prototype.
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HMS kurs for ledere
Det er et grunnleggende prinsipp at arbeidsmiljø kurs arbeidstakerne skal være med å arbeidsmiljøkurs kartlegge og finne løsninger på problemer på sin egen arbeidsplass. Ved spørsmål om tiltak som fører til endring i arbeidsmiljøet, skal oppfatningene til dem som blir berørt, høres.