Road Surface Condition Calculation for Mobility Route Planning
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Solution Overview
Problem
Existing road surface information management systems cannot accurately calculate the position and shape of ruts on road surfaces, which hinders the modification of target routes to accommodate difficult road conditions, and may result in sensor detection values not following the actual road surface conditions due to high vibration frequencies.
Innovation Solution
An operation management system that communicates with registered mobilities to obtain positional information, correlate it with specification and map data, and calculate road surface conditions, including the position and shape of ruts, based on sensor detection values, road surface type, and traveled routes, to store and update this information for setting appropriate target routes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle travels on a road surface at which tires of the vehicle vibrate at a high vibration frequency, then the vehicle can maintain high speed, but the detection value of the sensor installed on the vehicle does not follow the road surface condition
Solution Approach 1:
The patent introduces an intermediary calculation process that uses multiple sensor inputs (acceleration sensor, angular acceleration sensor, vehicle speed) and vehicle specification information to compute the road surface condition indirectly, rather than relying on a single sensor that directly measures road surface. This intermediary calculation approach filters out the effects of high-frequency vibrations while preserving the actual road surface condition information.
2Quantity of substance
If the system stores only basic road surface information, then the storage device requires minimal capacity, but the system cannot calculate position and shape of ruts for route modification
Solution Approach 1:
The patent transforms the stored information from basic road surface data to calculated road surface condition parameters (position and shape of ruts). By changing the parameters from raw sensor data to processed geometric characteristics of road defects, the system achieves comprehensive route planning capability without requiring excessive storage capacity, as only essential rut parameters are retained.
3Adaptability or versatility
If the system calculates detailed road surface conditions including position and shape of ruts, then appropriate target routes can be set, but the device complexity increases
Solution Approach 1:
The patent creates a multi-functional calculation system where a single integrated process performs multiple functions: detecting vehicle motion, calculating road surface conditions, determining rut parameters, and supporting route planning. This universal calculation module handles various road surface conditions and vehicle states through one unified algorithm, reducing overall system complexity compared to having separate dedicated systems for each function.
Data Source
AI summary
An operation management system including a controller configured to execute: a position obtaining process to obtain positional information from each registered mobility; a correlating process to correlate each registered mobility and specification information stored in a storage device with each other; a travel-history storing process to store, in the storage device, a traveled route which is a travel history of each registered mobility, so as to be correlated with map information; and a road-surface-condition obtaining process to calculate a road surface condition including a position and a shape of a rut corresponding to the traveled route based on information on a detection value of a sensor of each of registered mobility, the type of a road surface included in the map information, the specification information, and the traveled route and to store, in the storage device, the road surface condition so as to be correlated with the map information.