Vehicle Camera Switching for Light Blindness Prevention
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Solution Overview
Problem
Current driver assistance systems (ADAS) face challenges in maintaining effective visibility for camera-based monitoring functions, particularly in varying light conditions, which can lead to reduced accuracy in detecting lane lines and objects, potentially causing system failures in lane keep assistance and emergency braking.
Innovation Solution
A vehicle assist system utilizing primary and secondary camera assemblies, where the controller dynamically switches between them based on light intensity, deactivating primary cameras when light intensity exceeds a predetermined value to prevent blindness and relying on secondary cameras for backup detection, ensuring continuous operation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the primary camera assembly operates continuously to maintain monitoring function, then the system can detect lane lines and objects, but the camera becomes blinded by intense light which reduces detection accuracy
Solution Approach 1:
The camera system is segmented into primary and secondary camera assemblies. The primary camera handles normal monitoring while the secondary camera takes over when the primary camera is blinded by intense light, ensuring continuous accurate detection without light blindness affecting the system
Solution Approach 2:
The system prepares backup camera assemblies in advance that can immediately take over when the primary camera becomes blinded by intense light. This preemptive arrangement ensures that detection accuracy is maintained without interruption when light conditions change
2Object-affected harmful factors
If the primary camera assembly is deactivated when light intensity is high, then light blindness is prevented, but the monitoring function is interrupted until visibility returns
Solution Approach 1:
The camera system is divided into primary and secondary camera assemblies with distinct roles. The primary camera operates in normal conditions while the secondary camera is ready to activate when the primary camera is blinded, ensuring uninterrupted monitoring function
Solution Approach 2:
The system ensures continuous monitoring by switching to the secondary camera when the primary camera is blinded by intense light. This maintains the useful action of object detection without interruption, as the secondary camera immediately takes over the monitoring function
3Device complexity
If a single camera assembly is used to reduce system complexity, then the device structure is simpler, but the system fails under varying light conditions
Solution Approach 1:
The camera system is designed with multiple camera assemblies that can serve different functions based on light conditions. The primary camera handles normal monitoring while the secondary camera handles high-light conditions, making the system adaptable to various lighting environments
Solution Approach 2:
The camera system dynamically switches between primary and secondary cameras based on real-time light intensity detection. This dynamic adaptation allows the system to respond to changing light conditions and maintain detection accuracy across different environments
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system maintains reliable lane detection and emergency braking capabilities by switching between camera assemblies, preventing failures due to intense light conditions and ensuring occupant safety through adaptive use of camera assemblies.
Implementation Method 1
A sensor detects light within the first field of view
Data Source
AI summary
A method for assisting the operation of a host vehicle traveling on a roadway includes acquiring images around the host vehicle with at least one primary camera assembly having a first field of view. Visibility is detected within the first field of view. The at least one primary camera assembly is deactivated when the detected visibility is below a predetermined value. Images are acquired around the host vehicle with at least one secondary camera assembly having a second field of view until the detected visibility in the first field of view is at or above the predetermined value.