Design & Implementation of a Low Cost Based Wireless HCI System for Disabled Persons Using ARM7

摘要

This paper focuses on design & development of a portable wireless Human Computer Interface (HCI) system to create a robust hands free interface for disabled peoples or peoples having upper limb motor paralysis. Early techniques mainly considered image processing, gaze tracking and cameras to synthesis the device. We propose a new mouse as an input device for a computer whose operation is based on measurement of rotations of the user's head and detection of eye blinks. A tilt sensor(3-axis accelerometer) is used to detect both lateral and vertical head movements to navigate the mouse cursor position placed on a helmet .The IR based eye blink sensor is placed on a spec used to detect eye blink and in turns do clicking operation. The signals are sent to the micro-controller (ARM7 LPC2148) for processing & do required operations. The wireless technology includes Zigbee module used to sends signals to the computer in use. A C# based program is developed for the mouse control operations & provides a flexible method for the disabled people to improve both personal & professional life quality.