Gyro Sensor Correction with Magnetic Marker Azimuth Feedback
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Solution Overview
Problem
Gyro sensors in vehicles experience output fluctuations due to time and environmental conditions such as temperature and vibrations, affecting the accuracy of angular velocity measurements.
Innovation Solution
A correction method for gyro sensors that uses magnetic markers arranged along the road to estimate the vehicle's azimuth, allowing for the generation and application of correction information to stabilize the sensor output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gyro sensor is used to measure angular velocity, then measurement capability is provided, but output accuracy deteriorates over time and under environmental variations
Solution Approach 1:
The patent implements a feedback mechanism where the gyro sensor output is continuously compared with reference data from magnetic markers. The correction value derived from this comparison is fed back to adjust the gyro sensor output, forming a closed-loop system that maintains measurement accuracy despite temporal and environmental variations.
Solution Approach 2:
Magnetic markers arranged along the road serve as an intermediary reference system. Instead of directly trusting the gyro sensor output, the system uses magnetic markers as a mediator to provide stable reference azimuth data, which then corrects the gyro sensor measurements indirectly.
2Measurement precision
If correction using magnetic markers is implemented, then measurement accuracy is improved, but system complexity increases
Solution Approach 1:
The patent uses magnetic markers as simplified copies or representations of reference points along the road. Instead of using complex reference systems, magnetic markers provide a straightforward, easily implementable reference that can be detected by the vehicle's magnetic sensors, reducing overall system complexity while maintaining accuracy.
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 method effectively corrects the output characteristics of gyro sensors by using the estimated vehicle azimuth from magnetic markers, reducing the impact of time and environmental fluctuations, thereby improving the accuracy of angular velocity measurements.
Implementation Method 1
a vehicle onboard system which estimates an own vehicle position by using magnetic markers (10)
Data Source
AI summary
A correction method for a gyro sensor which measures angular velocity of a vehicle about an axis in a vertical direction includes a generation process of performing a process on a difference between a measured azimuth obtained by performing a process on an sensor output, which is an output from the gyro sensor, and a vehicle azimuth estimated by using markers arranged along a traveling road of the vehicle to obtain correction information and a correction process of correcting the measured azimuth obtained by performing the process on the sensor output, which is the output from the gyro sensor, by using the correction information.