Forward Collision Avoidance Control Using Gear Position
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Solution Overview
Problem
In vehicle forward collision avoidance systems using a single radar sensor, the attribute of a forward object is often erroneously determined, particularly when the vehicle is moving backward, leading to incorrect control actions.
Innovation Solution
A control device and method that incorporates gear position information to accurately determine the attribute of a forward object by adjusting the attribute based on the current gear position and the gear position at the time of object recognition, preventing erroneous determinations and improving control accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the FCA system uses only a radar sensor as a single sensor, then the device complexity is reduced and ease of manufacture is improved, but the reliability of object attribute determination deteriorates due to erroneous determination when the vehicle moves backward
Solution Approach 1:
The patent introduces gear position information as an intermediary element to mediate between the radar sensor data and the object attribute determination. By incorporating gear position as an additional input parameter, the system resolves the ambiguity in determining whether a detected object is moving or stationary, thereby improving reliability without adding physical sensors
Solution Approach 2:
The patent changes the parameters used for object attribute determination by incorporating gear position information alongside radar data. This parameter change allows the system to distinguish between vehicles moving backward and stationary objects, resolving the erroneous determination issue while maintaining the single-sensor configuration
2Ease of operation
If the FCA system determines object attribute based only on radar data and wheel speed, then the ease of operation is improved, but the measurement precision of object attribute deteriorates due to inability to identify forward/backward direction
Solution Approach 1:
Gear position information serves as an intermediary that bridges the gap between simple radar/wheel speed data and accurate object attribute determination. This intermediary parameter enables the system to precisely identify whether the vehicle is moving forward or backward, thereby improving measurement precision while maintaining operational simplicity
Solution Approach 2:
The patent adds another dimension of information (gear position) to the existing two-dimensional data (radar range, wheel speed). This dimensional expansion allows the system to accurately determine object attributes by considering the vehicle's operational state, resolving the precision issue without complicating the operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of forward collision avoidance systems by correctly identifying the attribute of objects, reducing malfunctions and improving user satisfaction and product reliability.
Implementation Method 1
the system has recently been developed using only a single sensor such as a radar or a camera for application to small vehicles
Implementation Method 2
the FCA system configured using only the radar recognizes presence of a forward object using radio waves of the radar
Data Source
AI summary
The control device for forward collision avoidance in a vehicle includes a forward object determination unit configured to recognize an object in front of the vehicle and to determine an attribute of the recognized object, a gear position detection unit configured to detect a gear position of the vehicle, and a forward collision-avoidance assist (FCA) control unit configured to finally determine the attribute of the object determined by the forward object determination unit according to the gear position input from the gear position detection unit and to set an FCA control range based on the finally determined object attribute.