Driving Support Device Rain Detection Logic
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Solution Overview
Problem
Existing driving support systems fail to accurately predict raining conditions, leading to inadequate driving support, as they rely solely on wiper operation frequency without considering vehicle speed, which can result in incorrect assessment of heavy rain situations.
Innovation Solution
A driving support device that incorporates sensors to acquire object information and raindrop data, using a processing device to adjust support based on wiper operation frequency and vehicle speed, enabling accurate prediction of raining conditions by disabling or reducing support when heavy rain is likely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving support is provided based solely on wiper operation frequency, then the system can detect heavy rain conditions, but it may incorrectly activate support at low speeds even when it is not raining heavily
Solution Approach 1:
The system changes the parameters used for rain detection by incorporating both wiper operation frequency and vehicle speed into the detection logic. By adding vehicle speed as an additional parameter, the system achieves more accurate heavy rain detection while maintaining manageable complexity through clear conditional thresholds.
2Productivity
If the system suppresses driving support at high vehicle speeds based on wiper operation, then it may reduce unnecessary support activation, but it risks suppressing needed support when heavy rain is actually present
Solution Approach 1:
The system modifies the suppression conditions by introducing vehicle speed as a critical parameter. Driving support is suppressed only when both high vehicle speed and high wiper operation frequency occur together, ensuring that suppression decisions are reliable and based on multiple correlated indicators rather than a single parameter.
3Device complexity
If the system uses only wiper operation state to predict raining conditions, then the detection mechanism remains simple, but the prediction accuracy deteriorates due to vehicle speed variations
Solution Approach 1:
The system enhances prediction precision by adding vehicle speed as a second detection parameter. This allows the system to differentiate between high wiper operation caused by heavy rain versus high wiper operation caused by high vehicle speed, achieving accurate rain prediction without excessive complexity.
Data Source
AI summary
A driving support device includes a sensor for acquiring object information on an object outside a vehicle; and a processing device for suppressing driving support, which is based on the object information, if an operation frequency of a wiper is equal to or higher than a predetermined reference and for providing the driving support if the operation frequency of the wiper is lower than the predetermined reference and if a vehicle speed is higher than a predetermined vehicle speed.