Vehicle Weather Estimation Using Satellite and Travel State Data
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Solution Overview
Problem
Existing vehicle situation estimation systems rely on weather prediction from artificial satellites, which are limited to observable data like rain cloud positions, leading to inaccuracies in weather and road condition estimation, and lack real-time, accurate information.
Innovation Solution
A vehicle situation estimation system that combines satellite weather information with vehicle-mounted sensors to detect travel states, allowing for the generation of actual weather and road condition information through shared data among vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If weather prediction information from artificial satellites is used, then weather information can be obtained, but the accuracy of weather condition estimation is insufficient
Solution Approach 1:
The patent combines satellite weather information with vehicle-mounted sensor data to create a comprehensive weather estimation system. The satellite provides macro weather patterns while vehicle sensors capture micro-level actual conditions, merging both data sources to achieve accurate weather condition estimation that neither source could provide alone.
Solution Approach 2:
The system uses vehicle travel state information as feedback to validate and refine satellite weather predictions. When sensor data indicates actual weather conditions differ from satellite predictions, the system adjusts its estimation, creating a feedback loop that continuously improves accuracy based on real-world observations.
2Measurement precision
If only satellite weather information is used, then information acquisition is simple, but the accuracy of actual weather condition estimation deteriorates
Solution Approach 1:
The vehicle-mounted sensors serve multiple functions: they detect travel state information for vehicle control, capture weather condition data for estimation accuracy, and provide feedback for system refinement. This multi-functionality justifies the added complexity by delivering multiple benefits from the same hardware components.
3Measurement precision
If vehicle-mounted sensors are added to detect travel state, then weather estimation accuracy improves, but device complexity increases
Solution Approach 1:
The vehicle-mounted sensors utilize the vehicle's existing operational data and travel state information to generate weather condition estimates. The system serves itself by using data already being collected for vehicle control purposes, eliminating the need for separate dedicated weather sensing equipment and reducing overall system complexity.
Data Source
AI summary
The vehicle situation estimation system includes: a vehicle weather information acquisition unit configured to acquire vehicle weather information on weather around a vehicle from an artificial satellite; a vehicle external information acquisition unit and a vehicle internal information acquisition unit that are configured to acquire vehicle travel state information from an external sensor and an internal sensor that are mounted on the vehicle and that are configured to detect a travel state of the vehicle; and an actual weather condition information generation unit configured to generate actual weather condition information indicating a weather condition around a road on which the vehicle travels based on the vehicle weather information and the vehicle travel state information.