Ski Boot Insole Sensor Array for Real-Time Motion Feedback
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Solution Overview
Problem
Current methods for monitoring skiing performance are limited, relying on subjective feedback and bulky equipment, making it difficult for both beginners and professionals to improve skills effectively, as they lack real-time, practical data on foot motion and pressure distribution.
Innovation Solution
A system embedded in ski boots, incorporating 3-axis accelerometers, gyroscopes, magnetometers, pressure sensors, and haptic feedback actuators, which transmit motion and pressure data to a smartphone for real-time analysis and feedback, providing objective assessment and training aids through visual and numerical representations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional monitoring methods (skier feelings, instructor observations, video analysis) are used, then the equipment remains simple and manageable, but the measurement precision and objectivity of skiing performance monitoring are insufficient
Solution Approach 1:
The system divides the monitoring function into multiple independent sensor modules (accelerometer, gyroscope, magnetometer, pressure sensors) that can be separately manufactured and then integrated into the boot sole. This segmentation allows each sensor to be optimized independently while maintaining overall system manageability.
Solution Approach 2:
The sensor suite is designed to perform multiple functions simultaneously: measuring linear acceleration, rotational motion, magnetic orientation, and pressure distribution all through a single integrated system. This multi-functionality eliminates the need for separate monitoring devices, improving measurement precision without proportionally increasing complexity.
2Ease of operation
If real-time haptic feedback actuators are embedded in the ski boot, then the ease of operation and training effectiveness are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The haptic feedback actuator is nested within the existing boot structure, specifically integrated into the insole or boot sole assembly. This nesting approach allows the actuator to be incorporated during the boot manufacturing process rather than requiring separate installation steps, thereby improving ease of manufacture while maintaining training effectiveness.
Solution Approach 2:
The system provides automatic real-time feedback to the skier without requiring manual intervention or complex user input. The actuators autonomously deliver haptic cues based on sensor data processing, reducing the operational burden on the user while enhancing training effectiveness.
3Measurement precision
If multiple sensors (accelerometer, gyroscope, magnetometer, pressure sensors) are integrated into the boot sole, then the measurement precision of foot motion and pressure distribution is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple sensor types (accelerometer, gyroscope, magnetometer, pressure sensors) into a single integrated sensor array mounted on the boot sole. This merging approach consolidates what would otherwise be separate monitoring systems into one unified unit, improving measurement precision while managing complexity through integrated design and shared processing architecture.
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 precise real-time feedback on foot motion and pressure distribution, aiding in skill improvement and performance evaluation, by providing haptic cues for optimal turn execution and objective assessment of skiing techniques.
Implementation Method 1
3-axis accelerometer... to provide motion vectors in 9-degree of freedom
Implementation Method 2
3-axis gyroscope... to provide motion vectors in 9-degree of freedom
Implementation Method 3
3-axis magnetometer... to provide motion vectors in 9-degree of freedom
Implementation Method 4
pressure and force sensors are embedded into the sole of the ski boot... providing measurement of foot rotational and lateral motions
Data Source
AI summary
A system and method to provide haptic and visual feedback of motion of the skier foot and the forces transmitted to the skiboot insole and consequently to the ski/snow interface. This system comprises a motion and force sensors and a haptic actuator embedded in the skiboot insole in communication with a smart-phone based analysis application, configured to calculate insole motion and orientation and the distribution of pressure points inside the skiboot, then to provide haptic feedback to the skier foot instructing on timing and direction of change in the pressure points necessary to achieve optimal turn parameters. Furthermore, analyzed together with GPS coordinates are transmitted by the application to the cloud based server for further processing. Graphical and numerical representation of data is superimposed over a 3D map of a slope which may be viewed on the user smart-phone or on a remote computer terminal.