Motion Control Device Using Gravitational Sensing for Outdoor Wearables
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Solution Overview
Problem
Gesture input devices and somatosensory input devices are ineffective outdoors due to interference from sunlight and background noise, limiting their use in wearable devices like Google Glass, which often resort to voice-controlled methods that are also unreliable in such conditions.
Innovation Solution
A control device with a sensing module that detects angle and strength information, using gravitational acceleration sensors and filters to provide control signals, allowing for intuitive human motion input independent of environmental interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gesture input devices or somatosensory input devices are used, then intuitive control is achieved, but they become ineffective outdoors due to sunlight interference and background noise
Solution Approach 1:
The patent replaces optical sensing systems (infrared cameras) and acoustic sensing systems (microphones) with mechanical sensing systems (gravitational acceleration sensors). These sensors detect physical motion and orientation changes through gravitational acceleration, which is unaffected by sunlight or background noise, thereby maintaining reliability in outdoor conditions while preserving intuitive gesture-based control.
2Ease of operation
If built-in camera based gesture recognition is used, then gesture input is enabled, but the user's hand must stay within a limited range resulting in non-smooth controlling actions
Solution Approach 1:
The patent replaces camera-based optical gesture recognition with gravitational acceleration sensor-based motion detection. This mechanical sensing approach detects motion through acceleration changes regardless of distance, eliminating the limited range constraint of camera-based systems and enabling smooth controlling actions over a much larger spatial range.
3Adaptability or versatility
If voice-controlled methods are used in wearable devices, then control functionality is provided, but they become ineffective outdoors due to background noises
Solution Approach 1:
The patent replaces acoustic voice-controlled systems with mechanical gravitational acceleration sensing systems. The acceleration sensors detect motion patterns and gestures through physical acceleration changes, which are completely independent of acoustic environment. This substitution maintains control functionality while eliminating susceptibility to background noise interference in outdoor conditions.
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 accurate and intuitive control of electronic devices through human motion, unaffected by outdoor environmental conditions, providing a reliable alternative to voice-controlled methods.
Implementation Method 1
The sensing module is configured to detect angle information and strength information, wherein the angle information is related to an angle between the device reference axis and a base reference axis, and the strength information is related to a force applied to the main body
Data Source
AI summary
A control device includes a main body, a sensing module and a processing module. The sensing module is disposed on the main body. The main body is defined with a device reference axis. The sensing module is configured to detect angle information and strength information. The angle information is corresponding to the angle between the device reference axis and a base reference axis. The strength information is corresponding to a force applied to the main body. The processing module is configured to provide a control signal according to the angle information and the strength information.