Step Counting via Acceleration and Atmospheric Pressure Fusion
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Solution Overview
Problem
Existing electronic devices with acceleration and atmospheric pressure sensors face challenges in accurately counting steps and calculating activity levels, especially in varying environments such as roads with gradients, due to inconsistencies in sensor data.
Innovation Solution
An electronic device equipped with both an acceleration sensor and an atmospheric pressure sensor, where the controller processes data from both sensors to determine movement states and adjust calculation methods based on detected atmospheric pressure variations, allowing for more accurate step counting and activity calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If step counting is performed based solely on acceleration sensor data, then the device complexity is reduced, but the measurement precision deteriorates in environments with altitude changes or road gradients
Solution Approach 1:
The patent combines data from both the acceleration sensor and atmospheric pressure sensor to perform step counting. The controller integrates acceleration data with atmospheric pressure variations to distinguish between steps caused by walking and those caused by altitude changes, thereby improving measurement precision without significantly increasing device complexity since both sensors are already present in the mobile device.
Solution Approach 2:
The atmospheric pressure sensor acts as an intermediary to verify and validate step detection. By using atmospheric pressure changes as a reference, the system can confirm whether acceleration patterns correspond to actual steps or are merely due to environmental factors like elevation changes, thus improving accuracy in complex environments.
2Measurement precision
If atmospheric pressure sensor data is integrated to improve step counting accuracy, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The atmospheric pressure sensor serves multiple functions: it not only validates step counting accuracy but also enables altitude detection and environmental awareness features. This multi-functionality justifies the added complexity by providing additional valuable capabilities beyond mere step counting verification.
3Reliability
If strict conditions are applied for counting steps based on acceleration data, then the reliability of step counting improves on flat ground, but the productivity deteriorates in environments with road gradients
Solution Approach 1:
The system dynamically adjusts step counting conditions based on environmental context. By continuously monitoring atmospheric pressure changes, the controller can adaptively modify acceleration thresholds and detection parameters to account for road gradients and altitude changes, maintaining both reliability and productivity across varying terrains.
Data Source
AI summary
An electronic device includes an acceleration sensor configured to detect an acceleration value, an atmospheric pressure sensor configured to detect an atmospheric pressure value, and a controller. The controller is configured to calculate the amount of activity or the number of steps based on the acceleration value detected by the acceleration sensor and the atmospheric pressure value detected by the atmospheric pressure sensor.