Brake Light Detection Using Speed and Timing Synchronization
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Solution Overview
Problem
Existing brake light activation detection systems in vehicles suffer from low precision due to erroneous determinations caused by light reflections, such as sunlight, leading to inadequate discrimination of brake light activation in vehicles ahead.
Innovation Solution
A brake light activation determining device that synchronizes speed decrease timing with brake light activation timing using sensor and image data to enhance precision, incorporating environmental and vehicle changes detection for accurate brake light detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If brake light activation is discriminated based on image data alone, then detection time is reduced, but determination precision deteriorates due to erroneous detection from light reflections
Solution Approach 1:
The patent combines image data from cameras with speed data from sensors (LiDAR, radar, or vehicle speed sensors) to determine brake light activation. By merging these different data sources, the system maintains the rapid detection capability of image processing while adding the precision of multi-source verification to eliminate false detections from light reflections.
Solution Approach 2:
The system uses feedback mechanisms where sensor data and image data are cross-validated. When image data suggests brake light activation, the system checks whether sensor data confirms speed reduction at the corresponding timing. This feedback loop ensures accurate determination by requiring consistent evidence from multiple sources before confirming brake activation.
2Measurement precision
If sensor data is used to detect deceleration, then determination precision is improved, but detection time increases compared to image-based methods
Solution Approach 1:
The patent merges image processing results with sensor data analysis to achieve both rapid detection and high precision. The image processing provides quick initial detection while sensor data verification ensures accuracy, combining the speed advantages of image methods with the precision of sensor-based detection.
Solution Approach 2:
The system performs preliminary action by using image data to quickly identify potential brake light activation, then immediately verifies this with sensor data. This preliminary detection followed by verification allows the system to prioritize rapid identification while maintaining precision through subsequent confirmation.
3Device complexity
If brake light activation is determined without synchronization verification, then device complexity is reduced, but reliability deteriorates due to false positive detections
Solution Approach 1:
The system implements feedback-based synchronization verification where the timing of image-based brake light detection is cross-checked with timing data from speed sensors. This feedback mechanism verifies that detected brake lights correspond to actual deceleration events, significantly improving reliability while maintaining manageable system complexity through efficient timing correlation algorithms.
Data Source
AI summary
A brake light activation determining device has a processor configured to detect decrease in the speed of a vehicle ahead, which is located ahead of one's own vehicle, based on output information from a sensor that acquires information relating to the vehicle ahead, to discriminate whether the brake light of the vehicle ahead is activated based on an image representing the vehicle ahead, and to determine that the vehicle ahead is braking, when it has been discriminated that the brake light of the vehicle ahead has been activated, when the speed decrease timing at which reduction in the speed of the vehicle ahead has been detected and the activation timing at which brake light activation by the vehicle ahead was discriminated are synchronized for the vehicle ahead.