Vehicle Speed Correction for Rain Data Estimation
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Solution Overview
Problem
Existing technologies face challenges in accurately estimating precipitation intensity due to unstable atmospheric conditions, leading to a need for improved methods to provide high-accuracy precipitation data for disaster prevention and management.
Innovation Solution
A precipitation index estimation apparatus that collects and processes vehicle state information, including rain-related data, to estimate precipitation intensity by correcting data based on vehicle speed and determining the relevance of data based on road conditions, using a combination of operation mode data and rainfall amount data from windshield wipers and sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If rain-related data is collected from moving vehicles, then the quantity of precipitation data increases, but the measurement precision deteriorates due to vehicle speed effects
Solution Approach 1:
The patent applies parameter changes by introducing vehicle speed as a correction parameter. The estimation processing unit adjusts the rain-related data values based on the vehicle's speed at the time of data acquisition, thereby compensating for the measurement errors introduced by vehicle motion and improving the overall measurement precision while maintaining the benefit of collecting data from multiple moving vehicles
2Productivity
If all collected rain-related data is used for statistical processing, then the productivity of precipitation estimation increases, but the reliability decreases due to inclusion of invalid data from roads where windshield wiper operation is unnecessary
Solution Approach 1:
The patent applies the extraction principle by using the use determination unit to identify and extract only the valid rain-related data from the collected dataset. The unit determines whether to use each data point based on road characteristics, excluding data from roads where windshield wiper operation is unnecessary (such as tunnels or covered roads), thereby ensuring that only reliable data is included in the statistical processing while maintaining efficient productivity
Data Source
AI summary
A precipitation index estimation apparatus includes a data collection unit and an estimation processing unit. The data collection unit is configured to collect rain-related data for estimating a precipitation index indicating an intensity of precipitation within a predetermined period from vehicle state information generated in one or more vehicles. The estimation processing unit is configured to carry out a statistical processing of the collected rain-related data and estimate the precipitation index within the predetermined period. The estimation processing unit is configured to correct, before the statistical processing, a value of the rain-related data to be used for the statistical processing, according to speed of a vehicle at the time at which the rain-related data is acquired.