Forward Collision Avoidance via Dynamic Sensor Sensitivity Adjustment
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Solution Overview
Problem
Existing forward collision avoidance systems face challenges in effectively detecting and responding to pedestrians or vehicles in low speed limit areas, often resulting in malfunctions or non-operations due to sensitivity settings, and struggle to rapidly adapt to dangerous situations involving parked or stopped vehicles.
Innovation Solution
A system and method that utilize a vehicle controller to adjust sensor sensitivity and direction, providing audio-visual information, and adjusting braking force when entering a low speed limit area with parked or stopped vehicles, thereby enhancing forward collision avoidance performance by defining a dangerous area based on proximity and alerting the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor sensitivity is increased to detect pedestrians or vehicles in low speed limit areas, then collision detection capability is improved, but false malfunctions occur more frequently
Solution Approach 1:
The sensor sensitivity is made dynamically adjustable based on the vehicle's operating conditions. The controller increases sensor sensitivity specifically when the vehicle enters a low speed limit area (as determined by GPS location), and restores it to normal when leaving such areas. This dynamic adjustment allows high sensitivity only when and where needed, avoiding false malfunctions in other conditions.
Solution Approach 2:
The system changes the sensitivity parameter of the sensor based on the vehicle's geographic location. When the vehicle enters a low speed limit area (such as school zones or residential areas), the controller modifies the sensor's detection threshold to be more sensitive, enabling better detection of pedestrians or vehicles emerging from between parked cars.
2Reliability
If sensor sensitivity is increased to detect dangerous areas with parked vehicles, then forward collision avoidance performance is improved, but system complexity increases
Solution Approach 1:
The system performs preliminary detection of the vehicle's location using GPS to determine whether the vehicle has entered a low speed limit area before adjusting sensor sensitivity. This preliminary action allows the system to proactively prepare for potential hazards (pedestrians or vehicles between parked cars) by increasing sensor sensitivity in advance, rather than reacting after a hazard is detected.
3Measurement precision
If the system continuously monitors all areas for dangerous conditions, then collision detection coverage is improved, but energy consumption increases
Solution Approach 1:
The system applies different sensor sensitivity levels to different geographic locations. High sensor sensitivity is applied locally only in low speed limit areas where pedestrians or vehicles between parked cars are more likely to be present. In other areas, the system uses normal sensitivity levels, thereby reducing overall energy consumption while maintaining adequate detection coverage where it is most needed.
Data Source
AI summary
An apparatus and method for forward collision avoidance through sensor angle adjustment includes a position provider configured to provide information on a position of a host vehicle, a sensor configured to sense a presence of an object in vicinity of the host vehicle, and a vehicle controller configured to detect a dangerous area in a driving caution area, increase a sensitivity of the sensor toward the dangerous area, in response to detecting the dangerous area, and increase a forward collision avoidance performance of the host vehicle, in response to determining that the host vehicle enters the driving caution area through the position provider.