Geomagnetic Sensor Error Correction via Motion Data Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Geomagnetic sensors in electronic devices can be affected by currents and neighboring components, leading to measurement errors, especially as the number of components increases, and complex functions can cause processor load-induced errors, impacting the accuracy of motion sensing information.
Innovation Solution
Incorporating additional motion sensors like gyro and acceleration sensors to provide secondary sensing information, which is compared with geomagnetic sensor data to determine the operation state and correct any abnormalities, thereby controlling internal device performance to mitigate errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of parts mounted on the electronic device is increased, then the device functionality is improved, but the measurement precision of the geomagnetic sensor deteriorates due to increased interference from neighboring components
Solution Approach 1:
The system continuously monitors the output of the geomagnetic sensor and compares it with reference values or expected ranges. When interference from neighboring components is detected (indicated by abnormal sensor readings), the system automatically triggers compensation algorithms or adjusts the operation of interfering components to restore measurement accuracy.
Solution Approach 2:
The system changes operational parameters of either the geomagnetic sensor or neighboring components dynamically. This may include adjusting sampling rates, changing measurement timing to avoid high-current operations, modifying the operational state of nearby components, or applying software-based calibration parameters to compensate for interference effects.
2Adaptability or versatility
If complex functions are implemented in the processor, then the device capability is improved, but the measurement precision of the geomagnetic sensor deteriorates due to current transient from processor load
Solution Approach 1:
The system performs preliminary actions by scheduling high-load processor tasks away from geomagnetic sensor measurement periods. Before critical measurements are taken, the system proactively reduces processor load or enters a low-power state to prevent current transients from affecting sensor accuracy, ensuring optimal measurement conditions are maintained.
Solution Approach 2:
The system implements periodic measurement cycles where the geomagnetic sensor operates during designated time windows when processor load is minimized. High-complexity functions are executed in intervals between measurement periods, creating a rhythmic pattern that alternates between computation-intensive tasks and sensitive measurement phases to avoid interference.
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
This approach enhances the accuracy of motion sensing by reducing measurement errors and maintaining normal operation states, ensuring reliable geomagnetic sensor performance even under increased component density and high processing loads.
Implementation Method 1
A geomagnetic sensor included in an electronic device is capable of detecting a magnetic field of at least one axis of an x-axis, a y-axis, and a z-axis
Implementation Method 2
The electronic device may detect rotation, movement, a current position or state, etc. via these motion sensors
Data Source
AI summary
A method configured to operate an electronic device is provided. The method includes first sensing information of a geomagnetic sensor and second sensing information of at least one motion sensor. Designated attributes of the first sensing information and the second sensing information are compared. When the geomagnetic sensor is determined as a specific state depending on the comparison result, performance of a designated internal device is controlled.