Steering Assistance Torque Adjustment for Lane Merge Detection
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Solution Overview
Problem
Current steering assistance systems lack an effective method to adjust intervention torque during a lane change, particularly in the context of a roadway merge, which can lead to delayed driver awareness and increased safety risks due to inadequate detection of lane changes.
Innovation Solution
The method involves detecting road markings that announce a lane merge using a surroundings sensing device, such as a camera, to adapt the intervention torque, guiding the vehicle towards the continuing lane, and transferring the driving task to the driver through a predictive 'rampdown' strategy, ensuring safety by adjusting the torque magnitude based on the detected markings and look-ahead range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the steering assistance system maintains constant intervention torque to keep the vehicle in the lane, then lane keeping stability is improved, but driver awareness of upcoming lane merges deteriorates
Solution Approach 1:
The intervention torque is made dynamic rather than constant. The system continuously adapts the torque magnitude based on detected road markings and vehicle state, reducing torque before lane merges to alert drivers and maintaining it during normal lane keeping, thereby resolving the contradiction between stability and driver awareness
Solution Approach 2:
The system uses feedback from road marking detection (lane merge announcements) to adjust the intervention torque. When lane merge markings are detected, the system reduces torque to inform the driver, while maintaining torque for lane keeping stability during normal conditions, thus addressing both stability and driver awareness needs
2Loss of information
If the steering assistance system reduces intervention torque to alert the driver of an upcoming lane merge, then driver awareness is improved, but lane keeping stability deteriorates
Solution Approach 1:
The system dynamically adjusts torque based on the vehicle's proximity to lane merges detected through road markings. Torque is reduced only when necessary (before lane merges) while maintaining stability during normal lane keeping, resolving the contradiction between alerting drivers and maintaining stability
Solution Approach 2:
The system performs preliminary action by detecting road markings that announce lane merges in advance and reducing intervention torque before the actual merge occurs. This allows driver awareness to be improved without compromising lane keeping stability, as the reduction happens proactively based on predicted lane geometry changes
3Loss of information
If the steering assistance system increases look-ahead range to detect lane merges earlier, then driver awareness is improved, but device complexity deteriorates
Solution Approach 1:
The system replaces complex mechanical sensing approaches with optical detection using cameras and image processing algorithms. This substitution allows for extended look-ahead range to detect lane merge markings early while managing device complexity through software-based solutions rather than additional mechanical sensors
Solution Approach 2:
The surroundings sensing device serves multiple functions: detecting road markings for lane merge prediction, identifying current lane position, and monitoring general road geometry. This multi-functionality allows early lane merge detection without proportionally increasing device complexity, as the same sensor system performs multiple detection tasks
Data Source
AI summary
A method for adjusting an intervention torque of a steering assistance system on a steering system of a vehicle in the context of a required lane change, the method encompassing a step of adapting a magnitude of the intervention torque in response to a detected marking that announces a lane merge in advance of a beginning of said merge.