Abstract
This paper introduces a novel device based on a tactile interface to replace the attendant joystick in electric wheelchairs. It can also be used in other vehicles such as shopping trolleys. Its use allows intuitive driving that requires little or no training, so its usability is high. This is achieved by a tactile sensor located on the handlebar of the chair or trolley and the processing of the information provided by it. When the user interacts with the handle of the chair or trolley, he or she exerts a pressure pattern that depends on the intention to accelerate, brake or turn to the left or right. The electronics within the device then perform the signal conditioning and processing of the information received, identifying the intention of the user on the basis of this pattern using an algorithm, and translating it into control signals for the control module of the wheelchair. These signals are equivalent to those provided by a joystick. This proposal aims to help disabled people and their attendees and prolong the personal autonomy in a context of aging populations.
Highlights
The population in western developed countries is aging quickly
It is necessary that the design of devices allows the extension of the autonomy of Sensors 2014, 14 elder and/or impaired people
A straightforward application of the proposed device is its use as an alternative to the attendant joystick used with electric wheelchairs
Summary
The population in western developed countries is aging quickly. This has consequences in daily and working life [1]. It is necessary that the design of devices allows the extension of the autonomy of Sensors 2014, 14 elder and/or impaired people. This is advantageous and has benefits in terms of self-esteem and quality of life in general. A straightforward application of the proposed device is its use as an alternative to the attendant joystick used with electric wheelchairs. Electric wheelchairs have two motors that power the two main wheels independently to allow turning maneuvers, including sharp turns, so they are usually driven with a hand-operated joystick.
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