GNSS Positioning Cycle Adjustment via Sensor Error Feedback
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Solution Overview
Problem
Electronic devices face power consumption issues when using GNSS modules for position information measurement, and inaccuracies when relying solely on geomagnetic sensors and accelerometers.
Innovation Solution
A method and apparatus that combine GNSS modules, geomagnetic sensors, and accelerometers to measure position information, adjusting the GNSS module's measurement cycle based on error calculations from sensor data to optimize power usage and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the GNSS module is used continuously to measure position information, then the measurement precision is improved, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the measurement cycle of the GNSS module based on real-time error calculations from sensor data. When error exceeds a threshold, the GNSS module activates for correction; when error is within threshold, it remains inactive. This dynamic adaptation resolves the contradiction by making precision maintenance energy-efficient.
Solution Approach 2:
The system implements a feedback mechanism where sensor data (accelerometer and geomagnetic sensor) continuously monitors position estimation error. This feedback controls GNSS module activation - when error feedback indicates degradation beyond threshold, GNSS activates to correct; when feedback shows acceptable accuracy, GNSS remains off, resolving the precision-power consumption tradeoff.
2Use of energy by moving object
If the GNSS module is used less frequently to reduce power consumption, then the power consumption is reduced, but the measurement precision deteriorates
Solution Approach 1:
The patent introduces sensor data (accelerometer and geomagnetic sensor) as an intermediary to monitor position estimation quality. This intermediary enables the system to detect when position accuracy degrades without continuous GNSS usage, allowing selective activation only when needed, thus maintaining precision while reducing power consumption.
Solution Approach 2:
The system uses its own sensor resources (accelerometer and geomagnetic sensor) to self-monitor position estimation accuracy and self-regulate GNSS module activation. This self-service mechanism ensures precision maintenance through error detection while minimizing power consumption by activating GNSS only when the system itself indicates degradation.
3Use of energy by moving object
If only sensor data is used to measure position information, then the power consumption is reduced, but the measurement precision becomes incorrect
Solution Approach 1:
The patent applies partial action by using sensor data for routine position estimation and supplementing with GNSS measurements only partially - specifically when error threshold is exceeded. This partial use of the more accurate but power-intensive GNSS module maintains precision while avoiding excessive power consumption that would result from continuous GNSS operation.
Data Source
AI summary
A method of measuring position information is provided. The method includes measuring position information including at least one of a position, a direction of movement, or a distance of movement of the electronic device by using a Global Navigation Satellite System (GNSS) module, measuring at least one of the direction of movement, the distance of movement, or a change of speed of the electronic device by using at least one of a geomagnetic sensor or an accelerometer, calculating the position information based on the information measured by using the GNSS module, and the at least one of the direction of movement, the distance of movement, or the change of speed of the electronic device measured by using the at least one of the geomagnetic sensor or the accelerometer, and adjusting a position information measurement cycle using the GNSS module based on an error of the position information.