A novel development of head-set type computer mouse using gyro sensors for the handicapped

This paper describes the development of a novel head-set type computer mouse controlled by gyro sensors. This device operates on sensing the rotation of the human neck so that it may serve those who are physically disabled, for example spinal cord injuries and disabilities involving paralysis. For better performance, a novel hybrid operational mode is suggested, which combines the merits of an absolute pointing device and a relative pointing device. Actually, this device is a relative pointing device, but a hybrid mode can be accomplished by adjusting displacement rate of mouse pointer based on angular velocity of the head. The mouse click is controlled by eye blinking which is one of the most convenient behaviors in human behavior. Eye blinking is detected by measuring reflection of infrared rays exposed to muscles near eyes. Conscious and unconscious eye blinking is distinguished by the extent of reflection, because more infrared rays are reflected when user blinks his eyes consciously. This system can be attached to a head-set by virtue of its small bulk. Low cost, comfort and good performance render this system suitable for the design of a head-operating mouse for disabled people.