Wrist Terminal Atmospheric Pressure Sensor Water Land Detection
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Solution Overview
Problem
Existing sports measuring devices fail to accurately differentiate between water and land environments during water sports, leading to inaccurate data recording and reduced measurement accuracy.
Innovation Solution
A wrist terminal device equipped with a CPU, memory, and an atmospheric pressure sensor that sets a reference pressure before sports, determining the environment based on pressure differences and performing measurements accordingly, allowing for precise recording of surfing activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the device continuously records data during water sports activities, then the quantity of recorded data increases, but the measurement accuracy deteriorates due to inability to differentiate water and land environments
Solution Approach 1:
The patent applies parameter changes by monitoring atmospheric pressure values to detect environmental transitions between land and water. The CPU compares real-time atmospheric pressure readings against reference values to determine whether the device is in a water or land environment, thereby selectively controlling data recording based on the detected environment.
2Productivity
If the device records data in both water and land environments, then the productivity of data collection increases, but the reliability of measurement data deteriorates due to inclusion of inaccurate underwater data
Solution Approach 1:
The patent implements preliminary action by storing reference atmospheric pressure values before the user enters the water. This reference data is used subsequently to determine environmental conditions during the sport activity, enabling the device to proactively control data recording based on predicted water/land states rather than reacting after data is already corrupted.
3Device complexity
If the device uses simple continuous recording without environmental detection, then the device complexity is reduced, but the measurement precision deteriorates due to inability to distinguish water and land conditions
Solution Approach 1:
The patent applies self-service by enabling the device to automatically detect its own environmental condition (water or land) using its built-in atmospheric pressure sensor and CPU processing capabilities. The device independently determines whether to record data without requiring external input or complex additional sensors, thereby maintaining low device complexity while achieving high measurement precision.
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
The device effectively distinguishes between water and land environments, improving measurement accuracy in water sports by preventing data recording underwater and recording history data accurately when above water, enhancing the tracking of surfing activities.
Implementation Method 1
an atmospheric pressure sensor that detects an atmospheric pressure at a current position of a user as a reference atmospheric pressure in response to a setting operation from the user before starting the sports
Data Source
AI summary
Measurement accuracy in sports is improved. A wrist terminal includes a measurement information acquiring unit, a reference atmospheric pressure setting unit, and a state determining unit. The reference atmospheric pressure setting unit sets a reference atmospheric pressure. The state determining unit determines that the wrist terminal is located over water when a difference between the reference atmospheric pressure and a current atmospheric pressure after starting sports is within a predetermined atmospheric pressure range and the wrist terminal is located under water when the difference is outside the predetermined atmospheric pressure range. The measurement information acquiring unit 51 performs predetermined measurement on the basis of the determination result from the state determining unit 54.