Mobile Pressure Sensor Correction via Reference Data
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Solution Overview
Problem
Pressure sensors in mobile devices face accuracy issues due to external influences such as temperature, humidity, and altitude changes, leading to incorrect altitude determination, especially when used in applications like drones and augmented reality systems.
Innovation Solution
A method and system that utilize reference pressure information from auxiliary devices or servers to correct pressure sensor data, incorporating condition characteristics like temperature, humidity, and proximity to improve accuracy, and combine this with motion sensor data for precise altitude determination using sensor fusion techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensor data is used for altitude determination, then altitude information can be obtained, but accuracy is reduced due to external influences such as temperature, humidity, and altitude changes
Solution Approach 1:
The patent introduces reference pressure information from auxiliary devices or servers as an intermediary to correct the pressure sensor data. This reference pressure acts as a mediator that compensates for the harmful effects of temperature, humidity, and altitude changes, thereby improving measurement precision without directly eliminating the external influences.
Solution Approach 2:
The system implements feedback by continuously comparing the pressure sensor readings with reference pressure information and applying corrections based on the differences. This feedback mechanism allows the system to adapt to changing environmental conditions and maintain accurate altitude determination despite external influences.
2Measurement precision
If reference pressure information from auxiliary devices is used to correct pressure sensor data, then accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by enabling mobile devices to serve dual roles: as both the primary device requiring altitude information and as auxiliary devices providing reference pressure data. This allows a single device to contribute to the accuracy improvement of multiple devices, reducing the overall system complexity compared to requiring separate dedicated reference stations for each device.
Solution Approach 2:
The system uses copies of pressure reference information from multiple auxiliary devices to correct the primary device's sensor data. Instead of requiring a direct physical connection to a single reference source, the system can utilize replicated reference data from multiple sources, thereby reducing the complexity of establishing and maintaining direct reference connections.
3Measurement precision
If sensor fusion techniques are used to combine pressure and motion sensor data, then altitude determination accuracy is improved, but processing requirements and system complexity increase
Solution Approach 1:
The patent merges multiple sensor types (pressure sensors and motion sensors) into a unified correction system. By combining the strengths of both sensor modalities, the system achieves more accurate altitude determination while distributing the processing load across multiple sensors rather than requiring a single complex processing system.
Data Source
AI summary
A pressure sensor of a mobile device may be corrected by receiving reference pressure information from an associated device. The correction using differential pressure measurements may be influenced by one or more determined condition characteristics.