Unitless Activity Assessment for Sensor-Based Shoe Wear Detection
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Solution Overview
Problem
Shoes lose their physical support and protection as they wear out, even if they appear unworn, potentially causing foot injuries during intense physical activity.
Innovation Solution
A shoe wear-out sensor system that includes detectors, processors, and alarms to assess shoe wear by monitoring physical metrics such as acceleration, weight, and usage, alerting the user when the shoe is worn out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection is used to determine shoe wear, then the assessment method is simple, but it fails to detect actual wear when the shoe appears unworn
Solution Approach 1:
The patent replaces visual inspection (mechanical/optical assessment) with sensor-based detection systems that measure physical metrics such as acceleration, force, and usage patterns. This substitution enables accurate detection of shoe wear through quantitative data rather than subjective visual assessment, resolving the contradiction between measurement precision and device complexity by using electronic sensors to objectively monitor shoe condition.
Solution Approach 2:
The patent introduces sensor systems as intermediaries between the shoe and the user assessment process. These sensors act as mediators that continuously monitor physical metrics and translate them into wear assessments, providing an objective bridge between the shoe's actual condition and the user's awareness of wear, thereby improving detection accuracy beyond visual inspection.
2Reliability
If shoe replacement is delayed until visible wear occurs, then cost is reduced, but foot injury risk increases
Solution Approach 1:
The patent implements preliminary action by using sensors to detect shoe wear and usage patterns before visible wear occurs. The system proactively monitors physical metrics and predicts when the shoe will reach its wear limit, allowing users to replace shoes before actual wear compromises foot protection, thus maintaining reliability while optimizing usage time.
Solution Approach 2:
The patent establishes a feedback loop where sensors continuously monitor shoe usage and physical metrics, process this data to assess wear levels, and provide feedback to users about shoe condition. This ongoing feedback enables users to understand their shoe's actual wear state and replace shoes at the optimal time, balancing injury protection with maximizing shoe lifespan.
Data Source
AI summary
A system assesses activity and displays a unitless activity value. A detector senses activity of a user. A processor reads sensed activity data from the detector. A display displays the unitless activity value. An enclosure houses the detector and the processor. The processor periodically reads the sensed activity data from the detector and processes the data to generate an activity number, the number being used to generate the unitless activity value based upon a maximum number and a display range.