Road Surface Roughness Correction Across Different Vehicle Types
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Solution Overview
Problem
Existing road surface evaluation methods based on acceleration sensors are influenced by vehicle suspension and tire conditions, leading to inconsistent and inadequate evaluation of road surface profiles.
Innovation Solution
A road surface evaluation apparatus and method that includes acquiring driving and position information, correcting roughness values using vehicle-specific information, and outputting corrected values in association with map data to provide accurate road surface profiles independent of vehicle type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If road surface profile is detected based on acceleration measured by acceleration sensor, then road surface evaluation can be performed using general vehicles, but the evaluation results vary depending on vehicle suspension and tire conditions leading to insufficient accuracy
Solution Approach 1:
The patent changes the parameters by introducing vehicle-specific correction values that account for differences in suspension and tire conditions. The correction value is determined based on vehicle type information and used to adjust the road surface roughness values, thereby compensating for variations caused by different vehicle configurations while maintaining the ability to use general vehicles for evaluation.
2Productivity
If road surface profile is evaluated without correction for vehicle information, then evaluation process is simple and quick, but the results are inconsistent across different vehicle types
Solution Approach 1:
The patent applies preliminary action by pre-determining correction values for different vehicle types before actual road surface evaluation. The correction values are stored in advance and automatically selected based on vehicle type information during evaluation, eliminating the need for complex real-time adjustments while ensuring consistent and reliable results across different vehicle types.
Data Source
AI summary
A road surface evaluation apparatus including a microprocessor. The microprocessor is configured to perform acquiring driving information (including information indicating a motion of a vehicle while driving and position information of the vehicle, map information including information on a road on which the vehicle is traveling, and vehicle information including unique information of the vehicle), deriving a roughness value indicating a roughness of a road surface of the road on which the vehicle is traveling based on the driving information, correcting the roughness value based on the vehicle information, and outputting the corrected roughness value in association with the road information.