Radar Velocity Correction for Target Trackability
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Solution Overview
Problem
Radar apparatuses face challenges in maintaining trackability of targets due to differences in relative velocity between instantaneous and predicted data, leading to potential misallocation of data and reduced continuity in target tracking.
Innovation Solution
The radar apparatus includes a detection portion to transmit and receive radio waves, and an allocation portion that corrects velocities of instantaneous and prediction data to align them with a predetermined reference direction, allowing for accurate allocation of instantaneous data to prediction data based on corrected velocities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If relative velocity is calculated based on transmission wave and reflection wave from one and the same target, then target detection is achieved, but difference in relative velocity between instantaneous data occurs due to difference between reflection points, causing deviation from predicted relative velocity and reducing trackability
Solution Approach 1:
The velocity correction process segments the velocity measurement into two independent correction steps: first correcting instantaneous data velocity to the reference direction, then correcting prediction data velocity to the reference direction. This segmentation allows each velocity to be independently aligned, eliminating the mismatch caused by reflection point differences and improving allocation reliability.
Solution Approach 2:
A predetermined reference direction is introduced as an intermediary to mediate between instantaneous data velocity and prediction data velocity. Instead of directly comparing the two velocities which differ due to reflection point variations, both velocities are first transformed to align with the reference direction, enabling accurate comparison and allocation.
2Stability of the object's composition
If instantaneous data is allocated to prediction data based on calculated relative velocity, then target continuity is maintained, but velocity differences cause misallocation and reduce trackability
Solution Approach 1:
Velocity correction is performed as a preliminary action before data allocation. By correcting both instantaneous data velocity and prediction data velocity to align with the reference direction before comparing them, the system ensures that velocity differences due to reflection point variations are eliminated, enabling accurate data allocation and maintaining target continuity.
Solution Approach 2:
The velocity parameter is transformed by correcting its direction to align with a predetermined reference direction. This parameter change (directional alignment) removes the variability caused by different reflection points, allowing for reliable comparison and allocation based on velocity magnitude alone.
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 improves target trackability by reducing differences in velocity magnitudes between instantaneous and prediction data, ensuring continuous tracking even during reflection point movements.
Implementation Method 1
The detection portion transmits a radio wave to a target and receives a radio wave reflected on the target so as to detect instantaneous data
Implementation Method 2
calculates relative velocity of instantaneous data based on a transmission wave and a reflection wave in which the transmission wave is reflected
Data Source
AI summary
A radar apparatus includes: a detection portion that transmits a radio wave to a target and receives a radio wave reflected on the target so as to detect instantaneous data; and an allocation portion that allocates the instantaneous data to prediction data of the target so as to take continuity of the target; and the allocation portion corrects velocity of the instantaneous data and velocity of the prediction data respectively as velocities made in line with a predetermined direction set as a reference, so as to allocate the instantaneous data to the prediction data based on at least magnitudes of the respectively corrected velocities.