ADAS Backup Control Using Front Camera Failover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Advanced driver-assistance systems (ADAS) in vehicles face challenges in maintaining reliable actuation commands due to hardware or software failures, leading to potential loss of control during critical driving scenarios.
Innovation Solution
A vehicle vision system incorporating a front camera module (FCM) that serves as a backup controller, generating actuation commands when the ADAS controller is unreliable, and seamlessly transitions between ADAS and FCM control signals to ensure continuous vehicle control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the ADAS controller is used to generate actuation commands, then the system can provide automated driving assistance, but the reliability is reduced due to potential hardware or software failures
Solution Approach 1:
The patent implements a backup controller that is pre-configured and ready to take over control signals if the ADAS controller fails. This beforehand cushioning ensures that system reliability is maintained by having a predetermined fallback mechanism in place before any failure occurs, allowing seamless transition without loss of vehicle control.
2Reliability
If a backup controller is implemented to improve reliability, then the system can maintain control during failures, but the device complexity increases
Solution Approach 1:
The backup controller is implemented as a simplified copy of the ADAS controller's essential functions, rather than a full duplicate. This copying approach maintains the critical control capabilities needed for reliability while reducing the complexity overhead by implementing only the necessary subset of functions in the backup system.
Solution Approach 2:
The patent introduces a controller interface as an intermediary layer that manages communication between the ADAS controller, backup controller, and vehicle actuators. This intermediary simplifies the overall system architecture by providing standardized interfaces and abstraction layers, making the complex multi-controller system more manageable and maintainable.
3Duration of action of stationary object
If the system transitions between ADAS and FCM control signals, then continuous vehicle control is ensured, but the control signal switching complexity increases
Solution Approach 1:
The system implements a monitoring mechanism that continuously assesses the health and reliability of the ADAS controller. This feedback loop enables automatic detection of controller failures and triggers seamless transition to the backup controller, ensuring continuous vehicle control without requiring complex manual intervention or complicated switching logic.
Data Source
AI summary
A vehicular driving assistance system, via processing of image data captured by a forward-viewing camera of a vehicle, determines traffic lane marking information ahead of the vehicle. The vehicular driving assistance system determines reliability of the determined traffic lane marking information. A predictive sensor uses map data to predict the road ahead of the vehicle. Responsive to the determined reliability of the traffic lane marking information being greater than or equal to a threshold reliability level, an ADAS controller generates ADAS control signals based at least in part on (i) processing of image data captured by the forward-viewing camera and (ii) processing of radar data captured by a plurality of radar sensors. Responsive to the determined reliability of the traffic lane marking information being less than the threshold reliability level, the ADAS controller generates the ADAS control signals based at least in part on an output of the predictive sensor.