Magnetic Marker Detection with Adaptive Sensor Spacing
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Solution Overview
Problem
Conventional magnetic marker detection systems face challenges due to variations in magnetic sensor attachment heights across different vehicle types, leading to inconsistent magnetic measurement values.
Innovation Solution
A magnetic marker detection method and system utilizing a sensor array with multiple magnetic sensors that calculate differences in magnetic measurement values between pairs of sensors, adjusting the spacing between sensors based on attachment height variations to maintain consistent detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic sensors are used to detect magnetic markers on the road, then driving assistance functions can be provided, but detection reliability varies due to different attachment heights on different vehicle types
Solution Approach 1:
The patent changes the parameter of sensor spacing to compensate for attachment height variations. By adjusting the spacing between magnetic sensors based on the attachment height, the system maintains consistent detection performance across different vehicle types. The control unit calculates appropriate spacing values and configures the sensor array accordingly, transforming a fixed-parameter system into an adaptive one that compensates for installation variations.
2Adaptability or versatility
If the attachment height of magnetic sensors varies by vehicle type, then the system can be applied to multiple vehicle types, but the magnetic measurement values show large variations requiring different processing specifications
Solution Approach 1:
The patent introduces dynamic adjustment of sensor spacing based on attachment height. Rather than using fixed processing specifications for all vehicle types, the system dynamically determines the optimal spacing between magnetic sensors according to the actual attachment height. This dynamic configuration allows consistent detection algorithms to be applied across different vehicle types, as the physical sensor arrangement adapts to compensate for height variations.
3Measurement precision
If magnetic sensors are arrayed in the width direction to detect magnetic markers, then lane detection capability is improved, but detection accuracy is affected by attachment height variations
Solution Approach 1:
The patent adjusts the spacing parameter between magnetic sensors in the width direction based on attachment height. By changing this spatial parameter, the system compensates for the effect of different mounting heights on magnetic field measurement. The control unit calculates the appropriate spacing that maintains optimal detection conditions regardless of attachment height, ensuring consistent lane detection accuracy across different vehicle types.
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 and system enable reliable detection of magnetic markers regardless of sensor attachment height variations, ensuring consistent and accurate detection of markers for driving assistance systems.
Implementation Method 1
a sensor array with a plurality of magnetic sensors arrayed in a width direction obtain magnetic measurement values
Data Source
AI summary
Magnetic marker detection system for a vehicle including sensor array with magnetic sensors arrayed in a width direction to detect a magnetic marker laid in a traveling road includes differential circuit that obtains a difference between magnetic measurement values for each combination of two magnetic sensors spaced with a predetermined space, arithmetic circuit that performs process for detecting a position of the magnetic marker by processing the difference for the each combination, and setting circuit that selectively sets the predetermined space for obtaining the difference between magnetic measurement values; magnetic marker detection system can detect the magnetic marker laid in the traveling road with high certainty, irrespective of variations in attachment height of the magnetic sensors on a vehicle side.