Wearable Accelerometer Virtual Pointer for Vehicle Display Control
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Solution Overview
Problem
Conventional input devices like keyboards and mice are impractical or dangerous in environments such as vehicles, where a more intuitive and safe method for interacting with computer displays is needed.
Innovation Solution
A virtual pointing system using an accelerometer worn by the user to generate acceleration signals, which control a cursor on a display, allowing for intuitive interaction, such as moving the cursor with one set of axes and selecting objects with another, potentially using wireless signals compliant with IEEE standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional input devices like keyboards and mice are used, then precise control is achieved, but usability and safety deteriorate in vehicle environments
Solution Approach 1:
The patent replaces conventional mechanical input devices (keyboard, mouse) with a body-worn accelerometer system that detects user motion and translates it into cursor control. This substitution eliminates the need for manual dexterity and reduces distraction, thereby improving usability and safety in vehicle environments where traditional input methods are impractical or dangerous.
Solution Approach 2:
The accelerometer serves as an intermediary between the user's physical movements and the digital interface. By detecting acceleration forces from body motion and converting them into control signals, the system enables intuitive interaction without requiring direct contact with conventional input devices, thus resolving the contradiction between ease of operation and safety.
2Ease of operation
If a virtual pointing system with accelerometer is used, then ease of operation improves, but device complexity increases
Solution Approach 1:
The accelerometer-based system provides multiple functions through a single device: it can detect different types of motion (translation, rotation, tilting) and map them to various interaction modes (cursor movement, object selection, menu navigation). This multi-functionality improves intuitiveness while managing complexity by consolidating multiple input capabilities into one body-worn sensor.
Solution Approach 2:
The system manages complexity by dynamically adjusting interpretation parameters based on detected motion characteristics. Different acceleration patterns are mapped to different control actions, allowing the system to adapt to various user intentions without requiring complex hardware. This parameter-based approach simplifies the overall system architecture while maintaining high intuitiveness.
3Ease of operation
If accelerometer data is processed to control cursor movement, then ease of operation improves, but measurement precision requirements increase
Solution Approach 1:
The system employs feedback mechanisms to filter and validate accelerometer data. By continuously monitoring motion patterns and comparing them against expected gestures, the system can compensate for low precision measurements through adaptive algorithms, thereby maintaining ease of operation without requiring extremely high measurement precision.
Solution Approach 2:
The system uses partial action by focusing on the most significant acceleration components rather than requiring perfect measurement of all dimensions. This approach allows gesture recognition to function effectively with moderate precision, improving ease of operation while reducing the stringent requirements for measurement accuracy.
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 safe and intuitive interaction with computer displays in vehicles and other environments by allowing users to control cursors and objects with gestures, enhancing usability and safety.
Implementation Method 1
an accelerometer adapted to be worn by a user, wherein the accelerometer, when worn by the user, generates an acceleration signal representing acceleration of the user along a plurality of axes
Data Source
AI summary
An apparatus includes first and second accelerometers, a display device implemented in a vehicle, and a controller. The display device displays, to a user, a cursor relative to one or more objects. The first accelerometer generates a first signal representing an acceleration of the vehicle due to motion of the vehicle. The second accelerometer is worn by the user and generates a second signal representing both an acceleration of the user within the vehicle and the acceleration of the vehicle due to the motion of the vehicle. The controller isolates, based on the first signal, i) the acceleration of the user within the vehicle represented in the second signal from ii) the acceleration of the vehicle represented in the second signal. The controller moves the cursor relative to the objects based on the acceleration of the user within the vehicle as isolated from the acceleration of the vehicle.