Portable Acceleration Sensor for Running Landing Position Evaluation
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Solution Overview
Problem
Existing methods for evaluating running form and propulsion efficiency are limited by the need for large-scale systems and lack precision in detecting landing and takeoff timing, restricting their use for continuous long-distance running evaluation.
Innovation Solution
A portable electronic apparatus using an acceleration sensor to determine deceleration periods and calculate travel distance, allowing for real-time evaluation of landing position and propulsion efficiency without requiring a large-scale system, by detecting landing and takeoff timing based on acceleration values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion capture, video image capture, or floor reaction force meter methods are used to evaluate landing position, then measurement precision is improved, but device complexity and system scale increase significantly
Solution Approach 1:
The patent extracts the essential measurement function from complex motion capture systems by using only an acceleration sensor to detect landing position. This isolates the core measurement capability (acceleration detection) from the unnecessary complexity of full motion capture systems, video equipment, or force plates, achieving precise landing position evaluation with minimal device complexity
Solution Approach 2:
The patent replaces mechanical measurement systems (motion capture equipment, video image capture, floor reaction force meters) with an inertial measurement approach using acceleration sensors. This substitution eliminates the need for large-scale mechanical infrastructure while maintaining measurement capability through electronic sensing and signal processing
2Measurement precision
If large-scale systems are installed for running evaluation, then measurement precision is improved, but ease of operation deteriorates due to limited running locations
Solution Approach 1:
The acceleration sensor is attached directly to the runner's body, enabling the runner to perform self-measurement during normal running activities. This eliminates the need for external measurement infrastructure and allows runners to evaluate their landing position anywhere they can run, significantly improving ease of operation while maintaining measurement precision through direct body-mounted sensing
3Measurement precision
If traditional methods are used to detect landing and takeoff timing, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The acceleration sensor serves multiple functions simultaneously: it detects landing timing, takeoff timing, and landing position all through a single device. This multi-functionality eliminates the need for separate detection systems for each parameter, achieving precise timing detection while minimizing device complexity through universal sensing capability
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 evaluation of running form and propulsion efficiency during continuous long-distance running, providing users with immediate feedback to improve their running technique and reduce injury risk.
Implementation Method 1
determining a deceleration period in an on-ground duration of a user who is running based on an acceleration value
Data Source
AI summary
An on-running landing position evaluation method includes determining a deceleration period in an on-ground duration of a user who is running based on an acceleration value and calculating a travel distance in the determined deceleration period.