Rear Cross-Traffic Radar Filtering for Reflection False Alarms
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Solution Overview
Problem
Conventional rear cross-traffic alert systems provide false warnings due to detecting non-existent objects caused by reflections, leading to unnecessary alarms.
Innovation Solution
A vehicle object detection system that judges whether a detected target is an alert object based on the presence of stationary objects between the target and the vehicle, reflection strength, detection time, and positional criteria to differentiate between actual and reflected objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar sensors are used to detect target objects in the detection area, then the detection capability is improved, but false detections occur due to reflections causing unnecessary warnings
Solution Approach 1:
The patent introduces an intermediary judgment process that acts as a mediator between the radar detection system and the warning output. This judgment process analyzes multiple parameters (detection time, position, reflection strength, presence of stationary objects) to distinguish between real targets and false detections caused by reflections, thereby eliminating false alarms while maintaining detection accuracy
Solution Approach 2:
The system implements feedback by continuously monitoring detection results and using judgment logic to evaluate whether detected objects are genuine or false. The judgment process provides feedback to the warning system, suppressing warnings when false detections are identified while maintaining warnings for genuine threats, thus improving reliability without increasing false alarms
2Reliability
If the system outputs warnings for all detected objects, then safety coverage is improved, but unnecessary warnings are generated reducing driver trust
Solution Approach 1:
The patent changes the parameters used for warning determination by introducing multiple evaluation criteria beyond simple object detection. The system evaluates detection time duration, object position relative to stationary objects, reflection strength, and other parameters to dynamically adjust warning output, thereby maintaining safety coverage while improving warning accuracy and reducing unnecessary warnings
3Area of stationary object
If the detection area includes areas behind and lateral of the vehicle, then detection coverage is improved, but the complexity of distinguishing real objects from reflections increases
Solution Approach 1:
The patent segments the detection area into different zones and applies specific judgment rules for each segment. By dividing the detection space and associating stationary objects with specific segments, the system manages the complexity of distinguishing real objects from reflections in a structured manner, maintaining comprehensive coverage while organizing the judgment logic into manageable segments
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
Reduces false alarms by suppressing warnings for detected objects that are not real, improving the reliability of rear cross-traffic alerts.
Implementation Method 1
detecting means like a radar infrastructure as the one used for detecting vehicles in the blind spot (BSD)... long range radars/long range radar sensors... short-range-radars
Implementation Method 2
the target object detected in the detection area is actually not existent... false detection caused by reflections on other objects
Data Source
AI summary
A vehicle object detection system for detecting a target object in a detection area located behind and/or lateral of a subject vehicle, that is configured to generate a judgement on whether a target object which has been detected in the detection area is an alert object, to output the judgement to warning means which is configured to output a warning to a driver of the subject vehicle based on the judgement indicating that the target object is an alert object, and to generate the judgement based on: one or more positions of one or more other objects other than the target object being detected to be located between the target object and the subject vehicle, and a time period during which the target object is detected, being smaller than a specified period of time.