Radar Filtering Unit Merging Instantaneous Values
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Solution Overview
Problem
Existing radar devices face challenges in maintaining accuracy and stability of target detection due to variations in reflection levels and the generation of multiple instantaneous values for a single target, leading to unreliable data and decreased detection reliability.
Innovation Solution
A radar device employing a frequency-modulated transmission wave and a filtering unit that uses a particle filter to assign multiple instantaneous values to a single target data item, generating a representative value based on likelihood calculations to improve detection accuracy and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chronological filtering is performed on instantaneous values generated from extracted peaks, then target data items can be generated for each detected target, but multiple instantaneous values from a single target cause competition for target data items, decreasing detection stability and reliability
Solution Approach 1:
The patent merges multiple instantaneous values that correspond to the same target into a single target data item. The filtering unit performs chronological filtering by comparing instantaneous values across different cycles and merging those that represent the same target, thereby eliminating competition between multiple target data items for the same target and improving detection stability.
Solution Approach 2:
The filtering unit uses feedback from previous cycles to determine whether instantaneous values correspond to the same target. By comparing current instantaneous values with historical target data and using cost value calculations, the system provides feedback to accurately associate multiple instantaneous values with the correct target data item, enhancing detection reliability.
2Measurement precision
If peak extraction is performed on beat signals to generate instantaneous values, then target information can be obtained, but variation in reflection levels causes inconsistent number of instantaneous values per target, leading to detection instability
Solution Approach 1:
The system dynamically adjusts the filtering process based on the number of instantaneous values obtained for each target. When multiple instantaneous values are extracted from a single target due to varying reflection levels, the filtering unit adaptively merges them into one target data item. This dynamic approach maintains detection accuracy while ensuring stability regardless of reflection level variations.
Solution Approach 2:
The filtering unit changes the parameter of target data association by using cost value calculations to determine the most likely target for each instantaneous value. By dynamically adjusting which instantaneous value is associated with which target data item based on calculated costs, the system maintains accurate target detection even when the number of instantaneous values varies due to reflection level changes.
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
The solution enhances the accuracy and reliability of target detection by preventing competition for instantaneous values and ensuring that multiple reflections are correctly associated with a single target, thereby improving the overall stability and precision of the detection process.
Implementation Method 1
a radar device for detecting a target based on a frequency-modulated transmission wave and reflected waves of the transmission wave from the target
Implementation Method 2
frequency analysis is performed on beat signals representing the frequency differences between a transmission signal and reception signals
Data Source
AI summary
There is provided a radar device for detecting a target based on a frequency-modulated transmission wave and reflected waves of the transmission wave from the target. An extracting unit configured to extract peaks corresponding to the target based on beat signals which are differential waves between the transmission wave and the reflected waves. A generating unit configured to generate instantaneous values corresponding to the peaks based on the peaks extracted by the extracting unit. A filtering unit configured to generate a target data item corresponding to the instantaneous values by performing chronological filtering on the instantaneous values generated by the generating unit. The filtering unit can assign a plurality of instantaneous values to an assignment range corresponding to one target data item, based on individual elements included in the instantaneous values.