Inertial Gesture Control Using Torso Reference Motion Isolation
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Solution Overview
Problem
Existing motion-induced control systems for unmanned vehicles face challenges in accurately distinguishing between intended commands and motion-induced errors, particularly when the operator is in motion or on a vehicle, leading to potential interference with vehicle control.
Innovation Solution
A motion identification system that uses inertial sensors to compare motion data from a controller and an operator's torso to determine if the hand and body are moving in sync, thereby distinguishing between intended commands and motion-induced errors, and adjusts commands accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If motion-induced control systems are used to enable hands-free operation, then ease of operation is improved, but reliability deteriorates due to false commands when operator moves
Solution Approach 1:
The patent introduces a torso-mounted inertial sensor as an intermediary reference device to mediate between the controller's motion detection and the actual operator intent. This intermediary sensor provides a stable reference frame that filters out false motion signals caused by operator movement, allowing the system to maintain hands-free operation capability while improving control reliability by distinguishing between intentional hand gestures and unintentional body movements.
2Productivity
If inertial sensors are used to detect hand movements, then productivity is improved through faster control response, but measurement precision deteriorates when operator is moving
Solution Approach 1:
The patent implements a feedback mechanism where the torso-mounted inertial sensor continuously monitors operator body motion and feeds this information back to the control system. This feedback loop allows the system to dynamically adjust the interpretation of controller motion data, maintaining high measurement precision for hand gestures even when the operator is moving, while preserving the fast response characteristics of inertial sensing.
3Ease of operation
If motion-induced commands are used for vehicle control, then ease of operation is improved, but loss of information increases due to inability to distinguish intended commands from errors
Solution Approach 1:
The patent segments the motion detection function into two independent components: a controller-mounted sensor for detecting hand gestures and a torso-mounted sensor for detecting body motion. This segmentation allows the system to separately analyze and differentiate between intentional hand movements and unintentional body movements, reducing information loss by accurately determining command intent while maintaining ease of gesture-based operation.
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
This system effectively reduces errors by accurately differentiating between intended vehicle commands and motion-induced errors, ensuring stable and reliable control of unmanned vehicles even during operator movement.
Implementation Method 1
these methods and systems may determine, using motion data from inertial sensors, whether the hand/arm of the operator is moving in the same motion as the body of the operator
Data Source
AI summary
Methods and systems are described herein for detecting motion-induced errors received from inertial-type input devices and for generating accurate vehicle control commands that account for operator movement. These methods and systems may determine, using motion data from inertial sensors, whether the hand/arm of the operator is moving in the same motion as the body of the operator, and if both are moving in the same way, these systems and methods may determine that the motion is not intended to be a motion-induced command. However, if the hand/arm of the operator is moving in a different motion from the body of the operator, these methods and systems may determine that the operator intended the motion to be a motion-induced command to a vehicle.