Sensor Correction Control for Unintended Acceleration States
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Solution Overview
Problem
Conventional electronic devices with acceleration sensors face challenges in effectively managing correction values for detection errors, particularly when the device is in a state of unintended acceleration, which can lead to inaccurate calibration and operational issues.
Innovation Solution
The implementation of a method that uses a controller to determine the device's state based on detection results from sensors like the acceleration sensor and air pressure sensor, deciding whether to change or maintain the correction value for calibration, thereby preventing unnecessary recalibration during unintended acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the correction value is changed during unintended acceleration, then the calibration is updated frequently, but the measurement precision deteriorates due to inaccurate calibration
Solution Approach 1:
The system dynamically adjusts the correction value based on detected acceleration states. When unintended acceleration is detected, the system suspends correction value updates. This dynamic control ensures calibration occurs only during stable states, maintaining measurement precision while allowing frequent updates when appropriate.
Solution Approach 2:
The system changes the parameter of correction value update frequency based on acceleration conditions. During unintended acceleration, the update frequency is reduced to zero (suspending updates). During stable conditions, normal update frequency is restored. This parameter adjustment resolves the contradiction by making calibration accuracy-dependent on operational conditions.
2Adaptability or versatility
If the correction value is changed during unintended acceleration, then the calibration adapts to current state, but the reliability deteriorates due to calibration errors
Solution Approach 1:
The system dynamically controls when calibration adaptation occurs by monitoring acceleration states. Calibration is adapted during stable conditions but suspended during unintended acceleration. This dynamic gating mechanism maintains reliability by preventing erroneous calibration while preserving adaptability through conditional updates.
Solution Approach 2:
The system uses acceleration sensor feedback to determine whether calibration should proceed. When unintended acceleration is detected, feedback triggers suspension of correction value changes. This feedback loop ensures calibration reliability by using real-time acceleration data to gate the calibration process, allowing adaptability only when conditions are appropriate.
3Productivity
If recalibration is performed during unintended acceleration, then the calibration is updated continuously, but operational stability deteriorates due to erroneous correction values
Solution Approach 1:
The system dynamically gates recalibration operations based on detected acceleration states. During unintended acceleration, recalibration is suspended to maintain operational stability. During stable conditions, recalibration proceeds at normal rates. This dynamic control resolves the contradiction by adjusting update rates according to operational conditions.
Solution Approach 2:
The system takes preliminary action by detecting unintended acceleration before erroneous calibration can occur. When such acceleration is detected, the system proactively suspends correction value updates, preventing the generation of erroneous correction values. This preliminary anti-action maintains operational stability while allowing continuous calibration under appropriate conditions.
Data Source
AI summary
An electronic device includes a first sensor, a second sensor, and a controller configured to determine whether the electronic device is in a predetermined state based on a detection result of the first sensor. The controller is configured to, if it is determined that the electronic device is in the predetermined state, refrain from changing a correction value used to correct a detection error in the second sensor.