Abstract
Research and/or engineering questions/objective:
The proposed paper discusses latest requirements, innovations and implementations in functional safety for camera-based advanced driver assistance systems (ADAS), including digital mirrors. As of 2016, the 5 star NCAP rating will only be achievable if pedestrian detection/automatic braking functions are included in the vehicle - making functional safety of ADAS systems vital for car manufacturers - translating into reduced risk for vehicle occupants/pedestrians.The paper describes how system level requirements like functional safety/ASIL compliancy can be cascaded down to the component level to allow cost-effective ASIL-compliant systems and will describe the case of image sensor components in ADAS systems.
Methodology:
- Requirements for ASIL compliant systems
- Analysis of ASIL compliancy of ADAS systems – failure modes
- Failure-in-time (FIT) rate estimation of failure modes
- ASIL supporting functions implementation in individual components
- Analysis of image sensor failure modes
Results:
- Methodology for cascading down system-level ASIL requirements to the component level
- Case description of image sensors in ADAS systems
Limitations of this study:
This study is limited to automotive functional safety. Focus is on Advanced Driver Assistance Systems (ADAS). Use case of image sensor components in ADAS systems is analyzed.
What does the paper offer that is new in the field in comparison to other works of the author:
This is the first detailed public communication concerning functional safety techniques with regard to automotive image sensors.
Conclusion:
Utilisation of innovative optoelectronic devices (and their supporting software/firmware) in automobiles can greatly reduce the frequency of accidents on our roads. As functional safety becomes an increasingly important part of modern automotive design, manufacturers need to implement cost effective functional safe/ASIL compliant systems. This paper recommends taking system-level requirements into account when specifying individual components, as this leads to cost-effective functional safety/ASIL compliant systems. The use case of functional safety for image sensors in Advanced Driver Assistance Systems (ADAS) and other safety applications like digital mirrors is analyzed, including an implementation description
KEYWORDS - image sensors, functional safety, ASIL, automotive, driver assistance