Forward Collision Avoidance in Low-Speed Zones With Adaptive Sensitivity
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Solution Overview
Problem
Existing forward collision avoidance systems face challenges in effectively detecting and responding to pedestrians and parked or stopped vehicles in low speed limit areas, often resulting in malfunctions or non-operations due to sensitivity settings, which can lead to increased collision risks and driver burden.
Innovation Solution
A system and method that dynamically adjust sensor sensitivity and braking parameters based on the presence of pedestrians or vehicles in designated danger areas within low speed limit zones, providing audio-visual or tactile warnings and enhancing collision avoidance performance by differentiating sensitivity levels and braking forces accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor sensitivity is increased to detect pedestrians and parked vehicles in low speed limit areas, then collision detection capability is improved, but false malfunctions increase
Solution Approach 1:
The system dynamically adjusts sensor sensitivity based on the vehicle's location. When the vehicle enters a low speed limit area (identified through GPS/positioning systems), the controller automatically increases sensor sensitivity to enhance detection of pedestrians and parked vehicles. When exiting such areas, sensitivity returns to normal levels, preventing false malfunctions in regular driving conditions.
Solution Approach 2:
The system applies different sensitivity levels to different spatial zones. High sensitivity is applied specifically within low speed limit areas where pedestrians and parked vehicles are more likely to be present, while normal sensitivity is maintained in other areas. This localized adjustment resolves the contradiction by tailoring detection capability to specific environmental contexts.
2Reliability
If sensor sensitivity is decreased to avoid false malfunctions, then system reliability is improved, but collision detection capability deteriorates
Solution Approach 1:
Rather than using a fixed low sensitivity setting, the system dynamically modulates sensitivity based on contextual information from positioning systems. This allows the system to maintain high reliability overall while achieving high detection accuracy precisely when and where it is needed (in low speed limit areas).
Solution Approach 2:
The system compensates for reduced general sensitivity by applying enhanced sensitivity locally in critical zones (low speed limit areas). This ensures that pedestrian detection accuracy is maintained in high-risk areas without compromising overall system stability in normal conditions.
3Device complexity
If fixed sensitivity parameters are used in forward collision avoidance systems, then system complexity is reduced, but adaptability to different driving environments deteriorates
Solution Approach 1:
The system transitions from static fixed parameters to dynamic adjustable parameters. The controller automatically modifies sensitivity settings based on real-time position data, enabling the system to adapt to different driving environments (low speed limit areas versus regular roads) without requiring manual intervention or complex user configuration.
Solution Approach 2:
The positioning system serves multiple functions: it identifies low speed limit areas, triggers sensitivity adjustments, and enables environmental adaptation. This multi-functional approach allows the system to achieve high adaptability without proportionally increasing overall system complexity, as the same hardware infrastructure supports multiple operational modes.
Data Source
AI summary
A system for vehicle forward collision avoidance through a low speed limit area includes a position providing device, a sensor, and a vehicle controller. The position providing device is configured to provide information on a position of a host vehicle. The sensor is configured to detect whether an object is present in vicinity of the host vehicle. The vehicle controller is configured to: set a dangerous area based on a dangerous rank by detecting through the sensor, in a driving caution area, a motionless vehicle or a pedestrian; correct sensitivity of the sensor to be higher than an original sensitivity, after setting the dangerous area; and correct forward collision avoidance performance of the host vehicle to be increased from an original performance, when the position of the host vehicle is detected in the driving caution area through the position providing device.