Geomagnetic Sensor Calibration Control for Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices equipped with geomagnetic sensors face challenges in efficiently calibrating these sensors across varying magnetic field environments, particularly when not all usage modes require geomagnetic data, leading to unnecessary power consumption during calibration.
Innovation Solution
An electronic device with a processor and memory that executes a program to start calibration of the geomagnetic sensor only when operating in specific activity modes that utilize geomagnetic data, thereby reducing power consumption by avoiding calibration in modes where geomagnetic data is not needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed continuously or frequently across all usage modes, then measurement precision of geomagnetic sensor is improved, but use of energy increases due to unnecessary calibration in modes where geomagnetic data is not needed
Solution Approach 1:
The patent implements dynamic calibration control by making the calibration execution state variable based on the current usage mode. The processor dynamically adjusts whether to execute calibration by checking if the current usage mode is included in the calibration execution mode group, thereby adapting the calibration behavior to actual operational needs rather than using a fixed calibration schedule.
Solution Approach 2:
The patent changes the operational parameter of the geomagnetic sensor by switching between calibrated and uncalibrated states based on usage mode. The processor modifies the calibration execution parameter by comparing the current usage mode against a stored calibration execution mode group, enabling parameter-based control of calibration activities to optimize energy consumption.
2Reliability
If calibration is performed in all usage modes, then reliability of geomagnetic data is improved, but device complexity increases due to need to manage calibration across multiple modes
Solution Approach 1:
The patent segments the usage modes into two distinct groups: calibration execution modes and non-calibration modes. By dividing the usage modes and assigning different calibration behaviors to each segment, the system simplifies calibration management compared to handling all modes uniformly, while ensuring reliability is maintained in modes where geomagnetic data is required.
Solution Approach 2:
The processor automatically determines whether to execute calibration by autonomously checking if the current usage mode belongs to the calibration execution mode group. This self-service mechanism eliminates the need for complex external control systems or manual intervention, allowing the device to self-regulate calibration activities based on its operational state.
3Use of energy by moving object
If calibration is avoided in non-activity modes, then power consumption is reduced, but measurement precision may deteriorate if geomagnetic data is needed unexpectedly
Solution Approach 1:
The patent implements a feedback mechanism where the processor continuously monitors the current usage mode and compares it against the calibration execution mode group. This feedback loop ensures that calibration is executed precisely when needed (in activity modes requiring geomagnetic data) and avoided when not needed (in non-activity modes), optimizing both power consumption and measurement precision through real-time adaptive control.
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 ensures accurate calibration of geomagnetic sensors only when required, enhancing the device's convenience by minimizing power usage and maintaining accurate geomagnetic data usage across different usage modes.
Implementation Method 1
a geomagnetic sensor that detects geomagnetic data
Data Source
AI summary
The present disclosure provides as electronic device, a calibration method, and a program, which can suppress the power consumed by calibration of a geomagnetic sensor while maintaining high convenience. The electronic device operable in a plurality of types of usage modes including an activity mode associated with a predetermined activity, includes: a geomagnetic sensor that detects geomagnetic data; one or more processors; and one or more memories storing a program to be executed by the one or more processors. The program causes the one or more processors to perform the following: starting calibration of the geomagnetic sensor when it is determined. that the electronic device is operating in the usage mode of the activity mode associated with the predetermined activity.