Dynamic Connection Range Adjustment for Lateral Object Tracking
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Solution Overview
Problem
Vehicle-mounted radar systems struggle to accurately track objects moving laterally, such as bicycles, due to a wide gap between predicted and actual positions, leading to missed detections when the object's lateral velocity exceeds conventional connection range limits.
Innovation Solution
A system with a range setting unit, association extraction unit, and state quantity update unit dynamically adjusts the connection range based on positional and velocity conditions, extending it in the lateral direction for objects that may collide with the vehicle, while maintaining conventional ranges for low lateral velocity objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the connection range is set to be wide in the longitudinal direction and narrow in the lateral direction for low lateral velocity objects, then tracking accuracy for vehicles running in the same direction is improved, but detection accuracy for objects moving in the lateral direction deteriorates
Solution Approach 1:
The connection range is dynamically adjusted based on the object's velocity characteristics. For objects with high lateral velocity (such as bicycles crossing the road), the connection range is extended in the lateral direction to accommodate their movement pattern. For objects with low lateral velocity (such as vehicles running in the same direction), the conventional connection range configuration is maintained. This dynamic adjustment resolves the contradiction by adapting the connection range to match the specific movement characteristics of different object types.
Solution Approach 2:
The system changes the parameters of the connection range (specifically the lateral dimension) based on the detected velocity characteristics of the object. When an object is identified as having high lateral velocity, the lateral extent of the connection range is increased. This parameter change allows the system to maintain high tracking accuracy for conventional vehicles while simultaneously improving detection accuracy for laterally moving objects like bicycles.
2Reliability
If the connection range is widened for objects approaching a curve in the road, then tracking reliability for preceding vehicles is improved, but device complexity increases
Solution Approach 1:
Instead of uniformly widening the connection range for all objects, the system applies local quality by selectively adjusting the connection range only for specific objects that meet certain criteria (high lateral velocity). The connection range configuration is customized locally for each object based on its individual velocity characteristics, rather than applying a global adjustment to all tracked objects. This approach improves tracking reliability for laterally moving objects without unnecessarily increasing processing complexity for all tracking operations.
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 tracking objects moving laterally by expanding the connection range for potentially colliding objects, improving detection accuracy for bicycles and maintaining precision for low lateral velocity targets.
Implementation Method 1
a vehicle-mounted radar
Implementation Method 2
The velocity of an object observed by a vehicle-mounted radar is a velocity in a range direction in which the object is moving toward the subject vehicle
Data Source
AI summary
A range setting unit sets, for each of tracked objects as objects being tracked, a connection range as a range in which the tracked object is estimated to be movable based on a state quantity of the tracked objects determined in the previous processing cycle. An association extraction unit extracts, for each of the tracked objects, a reflection point detected in the current processing cycle and positioned in the connection range as an associated reflection point. A state quantity update unit updates, for each of the tracked objects, the state quantity of the tracked objects in the current processing cycle, based on the previous state quantity and the state quantity of the associated reflection point.