ADAS Warning Thresholds Tuned by Driver and Road Risk

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Solution Overview

Problem

Advanced Driving Assistance Systems (ADAS) and incident alert systems do not effectively consider driver behavior, environmental conditions, and vehicle status when determining the timing of warnings and alerts, leading to suboptimal hazard avoidance strategies.

Innovation Solution

The systems and methods adjust ADAS feature thresholds and incident alert timing based on risk factor information, including driver behavior, vehicle state, and environmental conditions, using a weighted summation of multiple risk factors to determine the appropriate timing for warnings and alerts, such as forward collision warnings, blind spot warnings, and automatic emergency braking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If ADAS systems use fixed thresholds for warnings and alerts, then the system operation is simple, but the system cannot adapt to different driving conditions and risk factors

Engineering Contradiction:

Improveadaptability to driving conditionsVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic threshold adjustment by continuously monitoring multiple risk factors (driver behavior, environmental conditions, vehicle status) and adjusting ADAS thresholds in real-time based on the aggregated risk score, transforming the static threshold system into a dynamic one that adapts to changing driving conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the parameter values of thresholds based on risk factor analysis. When risk factors indicate hazardous conditions (e.g., wet roads, driver distraction), the system adjusts threshold parameters to trigger warnings earlier or more frequently, thereby adapting to different driving conditions through parameter modification

Inventive Principle:

Principle #35Parameter changes

2Reliability

If ADAS thresholds are adjusted to be more sensitive, then hazard detection improves, but false alarms increase

Engineering Contradiction:

Improvehazard detection accuracyVSAvoidfalse alarms

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The system employs feedback mechanisms by continuously monitoring driver responses to alerts and adjusting threshold sensitivity accordingly. When drivers respond appropriately to warnings, the system learns to maintain or increase sensitivity; when false alarms occur without actual hazards, the system adjusts thresholds to reduce false positives while maintaining reliable hazard detection

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary analysis of multiple risk factors before triggering alerts, evaluating driver behavior patterns, environmental conditions, and vehicle status in advance. This preliminary assessment ensures that alerts are only generated when genuine hazards are detected, reducing false alarms while maintaining high detection accuracy

Inventive Principle:

Principle #10Preliminary action

3Loss of time

If ADAS warnings are triggered earlier, then driver reaction time increases, but driver distraction may increase

Engineering Contradiction:

Improvedriver reaction timeVSAvoiddriver distraction

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The system applies local quality by customizing alert timing and sensitivity based on specific driving contexts and individual driver characteristics. Rather than using uniform early warning thresholds for all situations, the system adjusts warning timing locally according to the current risk profile, driver behavior patterns, and environmental conditions, providing timely warnings only when necessary

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20230347876A1ADAS timing adjustments and selective incident alerts based on risk factor information

Publication Date: 2023.11.02 RIVIAN HOLDINGS LLC

AI summary

Systems and methods are provided for an Advanced Driver Assistance System (ADAS) with adjustable timing thresholds and an incident alert system of a vehicle. An ADAS system is configured to receive risk factor information and sensor data. The system is further configured to adjust a threshold based on the risk factor information, wherein the threshold affects timing of an ADAS feature, and determine whether to perform the ADAS feature based on the adjusted threshold and the sensor data. An incident alert system is configured to receive risk factor information and road hazard information. The system is further configured to determine whether the road hazard information indicates a road hazard is present on a vehicle route and determine whether to present the incident alert or when to present the incident alert based on the risk factor information.