Magnetic Sensor Offset Update via Dual Sampling Rules
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Solution Overview
Problem
Existing methods for updating the offset value of magnetic data from sensors require hardware to monitor the state of connection between azimuth measuring apparatus and vehicle-mounted systems, leading to usability issues and complex hardware configurations.
Innovation Solution
A magnetic data processing apparatus with two generation parts that store and generate offset update data using different sampling rules based on the distribution of magnetic data, allowing for automatic updating of the offset value without needing to judge the usage state of the sensor, thereby simplifying hardware requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware for monitoring the state of connection between azimuth measuring apparatus and vehicle-mounted apparatus is added, then the reliability of offset value update is improved, but the device complexity and ease of operation deteriorate
Solution Approach 1:
The magnetic data processing apparatus automatically determines the appropriate sampling rule by monitoring its own operational characteristics (posture change speed) without requiring external monitoring hardware. The system self-adapts by detecting whether it is being manually held or mounted on a vehicle through analysis of magnetic data distribution patterns, eliminating the need for separate connection state monitoring hardware while maintaining reliable offset value updates.
Solution Approach 2:
The patent replaces mechanical/connection-based monitoring (physical sensors to detect vehicle mounting) with a software-based approach that analyzes magnetic data characteristics. By substituting physical monitoring hardware with algorithmic analysis of magnetic field data distribution, the system achieves the same reliability function with significantly reduced hardware complexity.
2Adaptability or versatility
If multiple sampling rules are implemented to handle different usage states, then the adaptability of offset value update is improved, but the device complexity increases
Solution Approach 1:
The system dynamically selects between different sampling rules based on real-time analysis of magnetic data distribution. Rather than implementing all sampling rules simultaneously in a static manner, the apparatus adaptively switches between first and second sampling rules depending on whether the magnetic data exhibits characteristics of manual holding or vehicle mounting, thereby achieving high adaptability without proportionally increasing processing complexity.
Solution Approach 2:
The patent changes the sampling parameters (sampling interval, number of samples) based on the operational state detected through magnetic data analysis. By adjusting these parameters dynamically according to the detected usage state, the system achieves versatility across different carrying conditions without requiring separate fixed processing paths for each state, thus managing complexity through parameterization rather than structural duplication.
Data Source
AI summary
A magnetic data processing apparatus having a first generation part that stores samples of the magnetic data in accordance with a first sampling rule, and generates first offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a first feature. A second generation part stores samples of the magnetic data in accordance with a second sampling rule, and generates second offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a second feature. An update part updates an offset value of the magnetic data based on the first offset update data when the same is generated, and updates the offset value of the magnetic data based on the second offset update data when the same is generated.