Head Motion Character Input via Acceleration Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for character input by quadriplegic individuals, such as voice recognition and using a long stick, are cumbersome and uncomfortable, especially in noisy environments or for prolonged use, and do not effectively address the need for efficient and comfortable character input.
Innovation Solution
A method and apparatus that utilize head motion to select numeral groups and characters on a keyboard displayed on a screen by sensing the direction and speed of head movement, employing a signal detecting device with two-axial acceleration sensors to translate head motions into digital signals for character input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voice recognition is used for character input, then character input can be achieved without physical keyboard operation, but it becomes unusable in noisy environments or when the user is incapable of speaking
Solution Approach 1:
The patent introduces head motion sensing as an intermediary control method between voice recognition and physical keyboard operation. The sensing device detects head movements and translates them into keyboard input commands, providing an alternative input pathway that works in noisy environments and for users who cannot speak, while maintaining ease of character input
2Ease of operation
If a long stick is used for keyboard operation, then character input is enabled for quadriplegic users, but it causes muscle strain and discomfort during prolonged use
Solution Approach 1:
The patent replaces the mechanical stick-operated keyboard system with a sensing-based input system. Instead of requiring physical stick manipulation that stresses neck and jaw muscles, the system uses sensors to detect head motions and automatically translates them into keyboard input, eliminating the need for sustained muscle engagement while maintaining character input capability
3Ease of operation
If head motion sensing is used for character input, then ease of operation and comfort are improved, but device complexity increases due to additional sensing components
Solution Approach 1:
The patent makes the sensing device multi-functional by enabling it to perform both head position tracking and character input recognition through the same sensing components. The head motion sensor serves dual purposes: monitoring head position for display adjustment and detecting specific motion patterns for keyboard input, thereby reducing the need for separate input devices and minimizing overall system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables quadriplegic individuals to comfortably and efficiently input characters by making predetermined head motions, reducing muscle strain and overcoming environmental noise limitations, allowing for effective communication through text exchange.
Implementation Method 1
a signal detecting device comprising a two-axial motion sensing module having two one-axial acceleration sensors
Data Source
AI summary
Provided are an apparatus and method for inputting characters by making head motion. In the method for inputting a character by making head motion, a predetermined numeral group is selected among a plurality of numeral groups by shifting a center-point key set on a keyboard displayed on a screen in a predetermined direction along a sensed head motion. Then, one of numeral keys in the selected numeral group is selected by sensing the head motion, and the selected numeral key is inputted.