Using intentional muscle contractions as input signals for various hands-free control applications
Torsten Felzer, Rainer Nordmann · International Convention on Rehabilitation Engineering & Assistive Technology · 2008
This paper deals with an alternative input method based on tiny muscle contractions for the use with a variety of target applications. The previously introduced HAnds-free Mouse COntrol System (HaMCoS) is one example of a tool resulting from this input strategy. The system allows its user to completely operate a Windows® PC without the need to use the hands. Therefore, it can be very helpful for a person with a severe physical disability who is able to willfully contract one single muscle (since that is all it takes). The same idea has been applied to a control system for an electrically powered wheelchair. Both systems focus on a similar target population. The paper briefly describes how the muscle-based input signals are detected and how they are processed in the two control applications. As a third application, an environment control system -- again primarily targeting people with special needs -- is finally proposed. The graphical user interface (GUI) and the basic structure of the proposed tool are presented in thorough detail. Possible implications considering this input method for non-disabled users are also addressed.