Mobile Device Altitude Correction Using Atmospheric Pressure
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Solution Overview
Problem
Existing location determination technologies face challenges in accurately determining the level of a mobile device within buildings, particularly in areas where GPS or base-station location detection is unreliable, leading to errors in altitude computation and level identification.
Innovation Solution
A system that includes an atmospheric pressure detecting module, a location detecting module, and an elevation determining module, which computes altitude using atmospheric pressure, temperature, and reference information, and corrects level identification based on user status detection, ensuring accurate level determination even in GPS dead spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If atmospheric pressure and temperature data are used to compute altitude, then location determination accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple detection functions (atmospheric pressure detection, temperature detection, location detection, and user status detection) into a single mobile information processing device. This merging approach allows the device to utilize multiple data sources (atmospheric pressure, temperature, GPS coordinates, and user status) to compute altitude and determine location accuracy, thereby improving measurement precision while managing device complexity through integrated design
Solution Approach 2:
The mobile information processing device is designed with multi-functionality, serving both as a conventional mobile device and as a location determination system. The device uses its existing sensors (atmospheric pressure sensor, temperature sensor, location detection module) for multiple purposes: normal operation, altitude computation, and location accuracy assessment, thereby improving measurement precision without significantly increasing device complexity
2Measurement precision
If level identification is corrected based on user status detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the location determination result is compared with user status information (such as floor level detected by other sensors or user input). When discrepancies are found, the system uses the user status feedback to correct the level identification, thereby improving measurement precision. This feedback loop manages complexity by only activating correction when needed rather than continuously processing all data streams
Solution Approach 2:
The system performs preliminary detection of user status (such as detecting which floor the user is on through acceleration sensors or user input) before finalizing the level identification. This preliminary action allows the system to have reference information ready for comparison and correction, improving measurement precision while managing complexity by preparing correction data in advance rather than processing everything simultaneously
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 system effectively corrects level identification errors by using atmospheric pressure and temperature data to compute altitude and account for user status, providing accurate location determination within buildings even when GPS is unreliable.
Implementation Method 1
an atmospheric pressure detecting module (110) that detects an atmospheric pressure at a location where a mobile information processing device (100) exists
Implementation Method 2
a temperature detecting module (260) that detects a temperature at a location where a mobile information processing device (250) exists
Implementation Method 3
a computation result accepting module (150) that accepts a computation result of computing an altitude on a basis of the reference information accepted by the accepting module (130) and the information related to atmospheric pressure accepted by the atmospheric pressure information accepting module (140)
Data Source
AI summary
A location determination processing device includes: an accepting section as defined herein; an atmospheric pressure information accepting section as defined herein; a computation result accepting section as defined herein; an identification result accepting section as defined herein; a detection result accepting section as defined herein; a determination result accepting section as defined herein; a correcting section as defined herein; and an outputting section as defined herein.