Radar Orientation Estimation Using Boundary-Line Prediction
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Solution Overview
Problem
Existing radar systems struggle to accurately determine the orientation angle of objects in the vicinity of a vehicle, which is crucial for maintaining driving stability and reliability of safety and convenience functions.
Innovation Solution
A radar control device and method that estimates an orientation angle by transmitting and receiving signals, determining object positions in multiple periods, and setting boundary lines to calculate the orientation angle of a predicted object using a plurality of boundary lines extending from a center position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar systems use traditional measurement methods to determine object orientation, then they can obtain orientation information, but they require a large number of measurements and cannot accurately determine orientation at long distances
Solution Approach 1:
The patent applies preliminary action by predicting the object's position in the second period based on the first measurement data before actually performing the second measurement. The prediction step pre-establishes expected position ranges and orientation angles, allowing the system to quickly determine the final orientation angle with minimal actual measurements rather than requiring numerous sequential measurements.
Solution Approach 2:
The patent uses a simplified prediction model that discards complex continuous tracking requirements. Instead of maintaining persistent detailed object models over time, the system uses disposable prediction calculations based on limited measurement data points, achieving accurate orientation estimation without requiring extensive measurement histories.
2Measurement precision
If radar systems increase the number of measurements to improve orientation accuracy, then measurement precision improves, but the time required and system complexity increase
Solution Approach 1:
The patent segments the orientation determination process into distinct phases: first period measurement, prediction of second period position, and final orientation calculation. This segmentation allows each phase to use optimized methods - the first measurement provides baseline data, the prediction phase uses simplified geometric calculations, and the final phase requires minimal additional measurements, reducing overall system complexity while maintaining accuracy.
Solution Approach 2:
The patent applies partial action by performing only the minimum necessary measurements. Instead of continuously measuring to ensure accuracy, the system performs one measurement in the first period, predicts the second period position, and uses that prediction to determine orientation with a single additional measurement if needed, avoiding excessive measurements and associated complexity.
3Productivity
If radar systems use few measurements to reduce processing time, then processing speed improves, but orientation angle accuracy deteriorates
Solution Approach 1:
The patent introduces prediction as an intermediary step between the first measurement and the final orientation determination. This prediction mediator uses the first measurement data to calculate expected position and orientation ranges for the second period, allowing the system to achieve accurate orientation results with minimal actual measurements while maintaining high processing speed.
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
Enables accurate estimation of orientation angles with a small number of measurements, allowing for precise determination of object direction even at long distances, enhancing driving stability and safety functions.
Implementation Method 1
a transceiver configured to transmit a transmission signal for detecting surroundings of a host vehicle through a radar mounted on the host vehicle and receive a reflected reception signal
Data Source
AI summary
The embodiments relate to a radar control device and method. Specifically, a radar control device according to the embodiments may include a transceiver configured to transmit a transmission signal and receive a reflected reception signal, an object position determiner configured to determine a first measurement in a first period and a second measurement in a second period after the first period based on the reception signal, and an object direction estimator configured to set a plurality of boundary lines around the first object position, determine a plurality of predicted objects each having, as an orientation angle, a direction in which the plurality of boundary lines extend from a center of the first object position, respectively, and estimate an orientation angle of a predicted object closest to the second object position as an orientation angle of the object in the second period.