Driver Assist Reactivation via Dwelling Period Monitoring
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Solution Overview
Problem
Existing driver assist systems in vehicles often fail to accurately determine when to reactivate autonomous driving modes, leading to driver confusion and potential safety issues due to frequent reactivation attempts before the driver is ready, which can cause distractions and increase the risk of collisions.
Innovation Solution
A vehicle computer system that monitors and reacts to specific conditions such as steering wheel rotational rate, lateral offset, driver hand-engagement, closing rate, longitudinal acceleration, standard deviation of lateral offset, heading angle, and vehicle speed to determine a suitable dwelling period before reactivating the driver assist mode, minimizing unnecessary reactivation attempts and ensuring driver awareness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the driver assist mode is reactivated immediately after deactivation, then the system responds quickly to driving conditions, but the driver may be confused or distracted leading to safety issues
Solution Approach 1:
The system performs preliminary evaluation of multiple conditions (steering wheel rotational rate, lateral offset, driver hand-engagement) during a dwelling period before reactivating the driver assist mode. This preliminary action ensures the driver is ready and the environment is suitable for reactivation, preventing premature mode switching that could cause confusion or safety issues.
2Reliability
If multiple conditions are monitored for a dwelling period before reactivation, then driver confusion is reduced and safety is improved, but the system complexity increases
Solution Approach 1:
The system segments the reactivation decision process into multiple independent condition checks: steering wheel rotational rate monitoring, lateral offset measurement, driver hand-engagement detection, and dwelling period timing. Each condition is evaluated separately and combined to make the final reactivation decision, making the complex system more manageable and reliable.
3Reliability
If the system waits for a dwelling period before reactivation, then unnecessary reactivation attempts are minimized, but the response time to valid reactivation conditions is delayed
Solution Approach 1:
The dwelling period is not a fixed time delay but a dynamic evaluation window during which multiple conditions are continuously monitored. The system adapts the evaluation based on real-time driver behavior and vehicle state, allowing reactivation to occur as soon as all conditions are satisfied within the dwelling period, optimizing both reliability and response time.
Data Source
AI summary
A computer that includes a processor and memory. The memory may store instructions executable by the processor. The instructions may include: following a driver-initiated trigger to deactivate a driver assist mode, to reactivate the mode when, for a dwelling period, each of a plurality of conditions equal respectively predetermined value.