Load Detecting Apparatus Motion Identification via Center of Gravity
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Solution Overview
Problem
Conventional load detecting apparatuses struggle to accurately determine motions such as stepping up and down or lifting the thigh while a subject is on a detection plate, as they primarily measure balance and center of gravity shifts but fail to differentiate between these specific movements.
Innovation Solution
A load detecting apparatus with a support board equipped with two or more load sensors, which executes a load value detecting step, a ratio calculating step, a center of gravity calculating step, and a motion determining step to differentiate between various motions based on the ratio of load values to body weight and the position of the center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional load detecting apparatus measures only balance and center of gravity shifts, then the device complexity is low, but the measurement precision for specific motions is insufficient
Solution Approach 1:
The patent segments the load detection process into distinct analytical components: individual load sensor readings are separated and processed independently, then combined through ratio calculations and center of gravity computations to identify specific motion patterns. This segmentation enables precise differentiation between various motions while maintaining manageable system complexity.
Solution Approach 2:
The system dynamically processes load values by continuously calculating ratios of load readings and tracking center of gravity position changes in real-time. This dynamic approach allows the apparatus to adapt to different motion patterns and accurately identify specific exercises based on changing load distributions rather than relying on static measurements.
2Measurement precision
If the apparatus uses multiple load sensors to detect load values, then the measurement capability is improved, but the difficulty of detecting and measuring specific motions increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing reference ratio values and center of gravity positions corresponding to different standard motions. During actual measurement, the system compares real-time calculated values against these pre-established references, significantly simplifying the identification of specific motions while utilizing data from multiple load sensors.
Solution Approach 2:
The system introduces intermediary calculations—specifically the ratio of load values and the center of gravity position—as intermediate variables that bridge the gap between raw sensor data and motion identification. These intermediaries transform complex multi-sensor readings into simplified metrics that directly indicate specific motion patterns, reducing the overall difficulty of motion detection.
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 determination of motions like stepping up and down and thigh lifting by calculating and analyzing the ratio of load values and center of gravity position, allowing for accurate identification and instruction of specific exercises.
Implementation Method 1
a load sensor that detects a load value applied on the support board
Data Source
AI summary
A load detecting apparatus includes a load controller. In order to identifying predetermined number of motions performed on the load controller by the player, for example, a condition of a ratio of load values to a body weight value and a condition relating to a position of a center of gravity are defined in advance. The ratio of the detected load values to the body weight value and the position of the center of gravity are calculated, and on the basis of the ratio and the position of the center of gravity, a motion performed on the load controller by the player is determined.