Driving Assistance Brake Light Detection for False Deceleration
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Solution Overview
Problem
Existing driving assistance systems erroneously decelerate vehicles due to the misinterpretation of headlights as brake lights, leading to inappropriate deceleration when the preceding vehicle is not actually decelerating.
Innovation Solution
A driving assistance device that determines the state of brake lights based on the lighting state of the preceding vehicle's headlights and acceleration/deceleration, using additional auxiliary brake lights and image processing to accurately identify brake light activation, and controls the vehicle's acceleration/deceleration accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving assistance device changes target acceleration/deceleration based on lighting state of brake lights, then the vehicle can respond to preceding vehicle deceleration, but the system erroneously decelerates when headlights are misinterpreted as brake lights
Solution Approach 1:
The system uses feedback from multiple sensors (imaging device, acceleration sensor, headlight detection) to continuously monitor and verify brake light status. The acceleration sensor provides feedback on actual preceding vehicle deceleration, which is compared with visual brake light detection to confirm true brake activation and prevent false positives from headlight misinterpretation.
Solution Approach 2:
The patent introduces auxiliary brake lights as intermediary elements that provide unambiguous visual signals distinct from regular brake lights. These auxiliary lights serve as a mediator to clearly indicate brake activation state, eliminating the ambiguity that causes headlight misinterpretation errors in the detection system.
2Measurement precision
If the system uses headlight lighting state to determine brake light status, then it can detect brake activation, but it causes misinterpretation when headlights are on without actual braking
Solution Approach 1:
The system segments the lighting detection into distinct categories: regular brake lights, auxiliary brake lights, and headlights. By separating these functions and using dedicated detection logic for each type, the system avoids misinterpretation between headlight and brake light states, improving measurement precision while reducing false positives.
Solution Approach 2:
The system utilizes color or intensity characteristics of different lights to distinguish between headlights and brake lights. Auxiliary brake lights may use distinct color or blinking patterns that differentiate them from headlights, enabling accurate identification through optical property analysis rather than relying solely on position-based detection.
Data Source
AI summary
A driving assistance device includes a determination unit that determines whether a brake light of a preceding vehicle located in front of a vehicle is turned on, based on a lighting state of a headlight of the preceding vehicle and an acceleration/deceleration of the preceding vehicle, a calculation unit that calculates a target acceleration/deceleration of the vehicle, based on a determination by the determination unit of whether the brake light of the preceding vehicle is turned on, and a control unit that controls the vehicle so that an acceleration/deceleration of the vehicle corresponds to the target acceleration/deceleration.