Radar Target Detection for Large Vehicles
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Solution Overview
Problem
Conventional target detection apparatuses incorrectly detect large-size vehicles as separate targets due to multiple reflection points, leading to erroneous vehicle control decisions in automatic cruise control systems.
Innovation Solution
A target detection apparatus with reflection point position detection, counting, parallel-running pair extraction, and determination means to identify reflection points originating from the same large-size target, using a size determination threshold to prevent erroneous detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional target detection apparatus detects multiple reflection points separately, then detection sensitivity is improved, but detection accuracy deteriorates due to erroneous identification of large-size vehicles as multiple separate targets
Solution Approach 1:
The patent segments the target recognition process into multiple stages: initial reflection point detection, parallel-running pair extraction, and determination processing. By dividing the detection process into these sequential segments, the system can first identify all reflection points with high sensitivity, then systematically process them to correct identification errors, thereby maintaining both detection sensitivity and accuracy.
Solution Approach 2:
The patent introduces an intermediary determination process that acts as a mediator between raw reflection point detection and final target identification. This intermediate stage extracts parallel-running reflection point pairs and applies determination criteria to correctly identify whether they originate from a single large-size vehicle or separate targets, resolving the contradiction between sensitivity and accuracy.
2Area of stationary object
If radar waves reflect from multiple points on large-size vehicles, then detection coverage is improved, but control safety deteriorates due to erroneous detection leading to incorrect vehicle control decisions
Solution Approach 1:
The patent implements a feedback mechanism where determination results from the intermediary processing stage are fed back to correct the initial target identification. When parallel-running reflection points are identified as originating from the same target, the system adjusts the final target information accordingly, ensuring that detection coverage is maintained while control safety is protected through corrective feedback.
Solution Approach 2:
The patent performs preliminary extraction of parallel-running reflection point pairs before final target identification. By preparing and analyzing these pairs in advance through the determination process, the system can proactively prevent erroneous detection outcomes, ensuring control safety before final control decisions are made while maintaining comprehensive detection coverage.
3Speed
If conventional apparatus treats each reflection point as separate target, then detection speed is improved, but measurement accuracy deteriorates due to failure to recognize reflection points from identical target
Solution Approach 1:
The patent implements periodic determination processing that operates at appropriate intervals in the detection pipeline. Rather than continuously processing all reflection points in real-time, the system periodically applies the parallel-running pair extraction and determination logic, maintaining detection speed while ensuring measurement accuracy through periodic correction of identification errors.
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
Prevents erroneous detection of large-size targets, enhancing the safety and reliability of automatic cruise control by accurately identifying reflection points from a single large-size vehicle, thereby avoiding incorrect control decisions.
Implementation Method 1
a radar sensor 1 that receives reflected waves of radar waves transmitted towards the outside of the vehicle
Implementation Method 2
detects the position of a reflection point that has reflected the radar waves
Data Source
AI summary
A target detection apparatus counts the number of reflection points, taking a reflection point of interest as being a target reflection point, for each detected reflection point, the reflection points being present in a target area that is set with reference to the target reflection point and each having a difference in speed from the target reflection point, the difference being not more than a preset identical speed determination threshold, and extracts a parallel-running pair that is a pair of the reflection points that meet preset parallel-running conditions. The target detection apparatus determines that the two reflection points configuring the parallel-running pair originate from an identical target, when a count value is not less than a preset size determination threshold, the count value being of at least either of the two reflection points configuring the extracted parallel-running pair and generates target information reflecting the determination results.