Gyro Sensor Calibration via Acceleration-Triggered Stop Detection
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Solution Overview
Problem
Gyro sensors in electronic devices experience drift errors, leading to increased processing time and battery current consumption due to continuous calibration, which is inefficient and wasteful.
Innovation Solution
An electronic device with a sensor control module that sets a calibration period for the gyro sensor based on the device's state, determining a stop state using an acceleration sensor to minimize calibration frequency and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous calibration is performed to correct gyro sensor errors, then measurement precision is improved, but use of energy worsens due to constant activation of the gyro sensor
Solution Approach 1:
The patent implements periodic calibration at predetermined time intervals rather than continuous calibration. The sensor control module determines whether calibration is needed based on elapsed time since the last calibration, creating a periodic action pattern that reduces energy consumption while maintaining measurement precision through regular calibration cycles.
Solution Approach 2:
The patent dynamically adjusts calibration execution based on device state. The sensor control module determines whether the device is in a stop state or moving state, and only performs calibration when the device is stationary. This dynamic adaptation allows the system to optimize between calibration accuracy and energy consumption based on real-time conditions.
2Reliability
If continuous calibration is performed to correct gyro sensor drift errors, then reliability is improved, but loss of time worsens due to increased processing time
Solution Approach 1:
The patent implements periodic calibration at predetermined time intervals rather than continuous calibration. This reduces the total processing time spent on calibration operations while maintaining reliability through regular periodic corrections of gyro sensor drift errors.
Solution Approach 2:
The patent dynamically adjusts calibration execution based on device state, performing calibration only when the device is in a stop state. This dynamic approach reduces processing time by avoiding calibration during active use while maintaining reliability by ensuring calibration occurs when conditions are appropriate.
3Measurement precision
If calibration is performed frequently to maintain accuracy, then measurement precision is improved, but use of energy worsens due to frequent sensor activation
Solution Approach 1:
The patent dynamically adjusts calibration frequency based on device state, performing calibration only when the device is in a stop state. This dynamic adaptation maintains measurement precision by calibrating when accurate readings can be obtained while minimizing energy consumption by avoiding calibration during active periods.
Solution Approach 2:
The patent implements periodic calibration at predetermined time intervals, creating a balanced rhythm of calibration operations that maintains accuracy while limiting energy consumption through regular but not excessive calibration cycles.
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
The solution effectively corrects gyro sensor errors while minimizing current consumption by calibrating only when the device is in a stop state, thereby enhancing accuracy and prolonging battery life.
Implementation Method 1
an acceleration sensor configured to measure an acceleration of the electronic device
Implementation Method 2
a gyro sensor configured to measure an angular velocity of the electronic device
Data Source
AI summary
An electronic device and method for calibrating a gyro sensor thereof is disclosed. The electronic device includes an acceleration sensor configured to measure an acceleration of the electronic device, a gyro sensor configured to measure an angular velocity of the electronic device, and a sensor control module configured to set a calibration period of the gyro sensor based on a state of the electronic device, to determine a stop state of the electronic device using the acceleration sensor if the set calibration period arrives, and to calibrate the gyro sensor if the electronic device is determined to be at a stop state.