Autonomous Vehicle Steering Handover by Intent Detection
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Solution Overview
Problem
In autonomous driving scenarios, there is a need to determine whether the operation of the steering wheel is due to the driver's intention, as autonomous systems may not accurately differentiate between intentional driver input and unintentional forces, leading to potential accident risks.
Innovation Solution
A vehicle control device and method that utilize a processor to determine the driver's gaze direction and steering wheel operation to switch control from autonomous driving to manual driving based on threshold values and times, considering deceleration, steering wheel grip strength, and turn signal activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the autonomous driving system operates the vehicle with minimal driver intervention, then productivity is improved, but reliability deteriorates due to inability to accurately differentiate intentional driver input from unintentional forces
Solution Approach 1:
The system segments the driver input detection into multiple independent sensing channels: steering wheel torque sensor for rotational force detection, longitudinal force sensor for forward/backward force detection, gaze detection system for visual attention monitoring, and turn signal lamp status detection. Each sensor independently monitors a specific aspect of driver intent, and the processor integrates these segmented signals to make a comprehensive determination of intentional driver input, thereby resolving the contradiction between autonomous operation efficiency and driver input detection accuracy.
2Reliability
If the system switches to manual control based on steering wheel operation, then reliability is improved by responding to driver intent, but false switching occurs due to unintentional forces
Solution Approach 1:
The system implements a feedback mechanism where the processor continuously monitors multiple parameters (steering wheel torque, longitudinal force, gaze direction, turn signal status) and compares them against threshold values. When the combination of these parameters exceeds the threshold, the system provides feedback by switching to manual control mode. This multi-parameter feedback approach ensures that only genuine driver intent triggers control switching, eliminating false switching caused by unintentional forces while maintaining reliable response to actual driver commands.
3Measurement precision
If multiple parameters are monitored to determine driver intent, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The processor is designed as a universal control unit that handles multiple functions: it processes steering wheel torque signals, longitudinal force signals, gaze detection data, and turn signal status information. The same processor integrates these diverse inputs, applies threshold comparisons, determines driver intent, and controls vehicle operation mode switching. This multi-functional design achieves high measurement precision for driver intent detection without proportionally increasing device complexity, as a single universal processor performs all detection and control functions.
Data Source
AI summary
A vehicle control device includes a steering wheel that specifies a driving direction of a host vehicle and a processor. The processor may: determine that the host vehicle is under autonomous driving control; determine a candidate value for a threshold value or a candidate value for a threshold time based on at least one of a maximum deceleration value among decelerations of the host vehicle measured during a specified time, a strength with which the steering wheel is gripped, or any combination thereof; determine a threshold value or a threshold time value; switch control of driving of the host vehicle from a system to the driver based on steering wheel being operated with an amount of operation greater than the threshold value and for a time greater than the threshold time value; and control the host vehicle based on an operation of the driver.