Vehicle Speed Limit Verification via Lane Change Feedback
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Solution Overview
Problem
Drivers may mistakenly recognize speed limits on different lanes while traveling, leading to faulty speed limit recognition due to the directional orientation of their vehicle.
Innovation Solution
A vehicle-mounted driving assistance apparatus that includes a recognizer for identifying the speed limit of the current lane, a detector for lane changes, and a verifier to determine misrecognition by comparing speed limits before and after a lane change, ensuring accurate reporting of speed limits to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If speed limit recognition is performed based on captured images during vehicle travel, then the driver receives speed limit information, but misrecognition of speed limits on adjacent lanes may occur
Solution Approach 1:
The system uses lane change detection as feedback to trigger verification of speed limit recognition. When a lane change is detected, the system compares the previously recognized speed limit with the newly recognized speed limit to verify accuracy and detect misrecognition.
Solution Approach 2:
The system performs preliminary speed limit recognition continuously during vehicle travel, maintaining readiness to report speed limit information. The verification mechanism is pre-configured to automatically activate when lane changes occur, rather than waiting for misrecognition to manifest.
2Loss of information
If the system reports all recognized speed limits to the driver, then complete information is provided, but faulty speed limit information may mislead the driver
Solution Approach 1:
The verification mechanism uses lane change events as feedback triggers to validate speed limit recognition accuracy before reporting to the driver, preventing faulty information from reaching the driver while maintaining information completeness for valid readings.
Solution Approach 2:
The verification unit acts as an intermediary between the recognizer and the reporter, filtering out misrecognized speed limits before they are reported to the driver. This intermediary layer ensures that only verified accurate information is communicated to the driver.
3Reliability
If verification of speed limit recognition is performed, then misrecognition is detected, but system complexity increases
Solution Approach 1:
The verification system uses existing lane change detection capabilities as feedback triggers, avoiding the need for separate verification hardware. The verification logic leverages the natural occurrence of lane changes as validation opportunities, minimizing additional system complexity.
Solution Approach 2:
The system uses its own lane change detection functionality to trigger verification of speed limit recognition, making the verification process self-initiated rather than requiring external triggers or additional sensors. The system verifies its own recognition accuracy using existing operational data.
Data Source
AI summary
In a driving assistance apparatus mounted in a vehicle, a detector detects a lane change of the vehicle, a determiner determines a position of a lane traveled by the vehicle immediately after the lane change detected by the detector relative to a position of a lane traveled by the vehicle immediately before the lane change, and a verifier determines whether or not there is misrecognition of speed limits during travel of the vehicle based on a positional relationship between the lanes traveled by the vehicle immediately before and after the lane change detected by the detector and a comparison between recognized speed limits for the respective lanes traveled by the vehicle immediately before and after the lane change detected by the detector. If it is determined that there is misrecognition of speed limits, a reporter reports the recognized speed limit to a driver of the vehicle in a prescribed manner.