Load Detecting Apparatus Timing Control for Exercise Motion
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Solution Overview
Problem
Existing load detecting apparatuses struggle to accurately determine the timing of motions such as putting a foot on and down from a detection plate during exercises like step-up-and-down exercises, due to time lag issues when the foot is lifted off the plate, leading to uncomfortable and unnatural experiences for users.
Innovation Solution
A storage medium storing a load detecting program that executes on a computer, utilizing a load detecting apparatus with a support board equipped with sensors, which includes steps for detecting load values, instructing motions, counting elapsed time, deciding judgment timing, and determining motion execution based on detected load values and elapsed time, allowing precise timing determination of foot movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load detection is used to determine motion timing, then motion detection capability is provided, but time lag occurs when foot is lifted off the plate
Solution Approach 1:
The system performs preliminary actions by counting elapsed time from the start of the motion instruction before actually determining whether the motion is completed. This time counting mechanism anticipates the future state and allows the system to determine motion completion at the appropriate timing without waiting for load to return to baseline, thereby eliminating time lag.
2Reliability
If load value becomes approximately 0 when foot is put off the plate, then load detection works, but motion timing determination becomes inaccurate
Solution Approach 1:
The system introduces an intermediary mechanism - the elapsed time counter - that mediates between the load detection and motion timing determination. Instead of directly using load value changes to determine timing, the system uses the elapsed time as an intermediary parameter to bridge the gap between instruction start and motion completion, allowing accurate timing even when load value is approximately 0.
Solution Approach 2:
The system implements feedback by continuously monitoring both load values and elapsed time, and using this feedback to dynamically determine when motion completion has been achieved. The judgment timing decision is based on feedback from both the load sensor and the time counter, allowing the system to accurately detect motion completion timing without relying solely on load value changes.
3Adaptability or versatility
If only load changes with both feet on plate are measured, then balance and center of gravity can be measured, but step-up-and-down motion detection is impossible
Solution Approach 1:
The system achieves universality by making the load detecting apparatus capable of detecting multiple types of motions - both balance/center of gravity changes and step-up-and-down motions. By combining load detection with elapsed time counting and judgment timing decision mechanisms, the same apparatus can accurately detect timing for different exercise types, including single-foot step-up-and-down motions that were previously undetectable.
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 timely determination of foot motions, enhancing user experience by reducing time lag and improving the accuracy of motion detection during exercises, thereby providing a more natural and comfortable interaction with the apparatus.
Implementation Method 1
a load sensor (36b) which detects a load value (360b) applied to the support board (360a)
Data Source
AI summary
A load detecting apparatus includes a load controller, and judges a motion of a player on the basis of detected load values. Judgment timing for a motion of putting the feet on and down from the controller is decided on the basis of an elapsed time from an instruction of a motion. In a case that a step-up-and-down exercise is performed, a judgment timing of a motion for bringing about a state both of the feet are put down on a ground at a fourth step is decided on the basis of a judgment timing of a motion of putting a third step down.