Wrist Terminal Movement Analyzer for Sports State Recognition
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Solution Overview
Problem
Existing sports monitoring devices struggle to accurately record and distinguish between different moving states, such as riding and paddling, during sports like surfing and snowboarding, often due to reliance on speed thresholds which can lead to erroneous determinations.
Innovation Solution
A wrist terminal device equipped with a position information acquiring unit, sensors, and a processor that determines specific moving states by analyzing GPS data and sensor readings, including acceleration, angular velocity, and altitude, to record movement paths only when within a predetermined angle range relative to the sport's direction, thereby reducing false positives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If speed threshold alone is used to determine moving state, then device complexity is reduced, but measurement precision deteriorates due to erroneous determinations between riding and paddling states
Solution Approach 1:
The patent changes from using a single parameter (speed threshold) to using multiple parameters (speed, direction angle, and their rate of change) to determine moving state. This allows the system to distinguish between riding and paddling states more accurately by considering both the magnitude and direction of movement, resolving the contradiction between simplicity and accuracy.
Solution Approach 2:
The patent adds a directional dimension to the determination by calculating the angle between the movement direction and the wave direction. This transforms the determination from a one-dimensional speed-based approach to a two-dimensional approach incorporating both speed and direction, enabling more precise differentiation between riding and paddling states.
2Measurement precision
If multiple parameters are used to determine moving state, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses multiple parameters (speed, direction angle, rate of change) to improve measurement precision. The processor calculates these parameters and applies them in a systematic determination process that distinguishes between riding and paddling states, accepting the increased complexity as necessary for accurate measurement.
Solution Approach 2:
The patent incorporates directional information as an additional dimension to the determination process. By calculating the angle between movement direction and wave direction, the system adds spatial orientation to the analysis, improving accuracy despite the increased computational requirements.
3Productivity
If all position information is recorded continuously, then productivity is improved, but loss of energy increases due to continuous GPS operation
Solution Approach 1:
The patent implements periodic recording by storing position information only at specific intervals when the user is in a riding state, rather than continuously. The processor determines whether to record based on the current moving state, creating a periodic recording pattern that reduces energy consumption while maintaining data completeness for relevant activities.
Solution Approach 2:
The patent extracts and records only the position information corresponding to specific moving states (riding states) while excluding information from other states (paddling, resting). This selective extraction reduces the total amount of data stored and the energy required for continuous GPS operation, while still providing complete information about the sport activity.
Data Source
AI summary
A movement analyzer includes a position information acquiring device, a memory, and a processor. The processor executes a program to perform operations including acquiring position information of the movement analyzer with the position information acquiring device, determining whether or not a moving state of the movement analyzer is a specific moving state, and recording the position information corresponding to the specific moving state in the memory as a path of the specific moving state when a determination result indicates that the moving state of the movement analyzer is the specific moving state.