Control units for operation of computers by severely physically handicapped persons.

Area of Science:

• Assistive Technology
• Human-Computer Interaction
• Rehabilitation Engineering

Background:

• Severely physically disabled individuals often face challenges using standard computer interfaces.
• Limited controlled movements are the primary means for interaction for this population.
• Adaptation of computer systems is crucial for enabling access and independence.

Purpose of the Study:

• To describe adapted computer systems for individuals with severe physical disabilities.
• To identify and utilize limited controlled movements for computer operation.
• To standardize input signals and develop interface control units for accessibility.

Main Methods:

• Identification of controllable movements in severely disabled individuals.
• Development of input devices generating signals from these movements.
• Standardization of input signals to one or two on/off contacts.
• Design of an Interface Control Unit (ICU) for linking input devices.
• Integration of a remote infra-red unit for wheelchair mounting and operation.

Main Results:

• The study describes specific devices and units for computer adaptation.
• A standardized input signal (one or two on/off contacts) was adopted.
• An Interface Control Unit was developed to manage input signals.
• A remote infra-red control unit for wheelchair integration was designed.

Conclusions:

• Adapted computer systems can be effectively operated by severely physically disabled individuals using controlled movements.
• Standardized input signals and interface control units simplify programming and enhance usability.
• The described interface control units and remote operation enhance computer accessibility and user independence.