Object Detection Device Radar Image Fusion
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Solution Overview
Problem
Existing object detection systems, such as those using millimeter waves, face challenges in accurately determining the position of a preceding vehicle due to weak reflection areas and potential misidentification of road surface reflections, leading to erroneous detection and control issues.
Innovation Solution
An object detection device that combines radar and image acquisition systems to set a determination region, using both reflected wave information and image-based characteristic points to accurately locate objects within the detection range, thereby minimizing false positives and improving control accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the threshold for reflected wave amplitude is set low to detect vehicles with small reflection areas, then detection capability for small reflection areas is improved, but the risk of erroneously detecting road surface reflections as vehicles increases
Solution Approach 1:
The patent combines radar detection results with image recognition results to determine object positions. The object determination unit integrates information from both the reflected wave amplitude/phase detection and the image capturing device, cross-validating detections to distinguish actual vehicles from road surface reflections. This multi-sensor fusion approach maintains high detection sensitivity while improving reliability by requiring consistent evidence from multiple sources.
Solution Approach 2:
The patent introduces an object determination unit as an intermediary that processes and validates detections from both the radar receiver and image capturing device. This intermediary component cross-checks the reflected wave data against image data, acting as a mediator that filters out false detections (such as road surface reflections) while preserving true vehicle detections, thus resolving the contradiction between sensitivity and reliability.
2Area of stationary object
If probe waves are transmitted to detect objects diagonally ahead with high reflectivity, then detection range is extended, but false detection of objects outside the intended detection range increases
Solution Approach 1:
The patent merges radar detection data with image capturing data to accurately determine object positions. By cross-referencing the position information from both sensors, the system can verify whether detected objects are within the intended detection range and correctly identify their locations, preventing false detections of objects diagonally ahead or outside the target area.
3Measurement precision
If reflected waves from weak reflection areas are amplified to improve detection, then detection sensitivity is improved, but the risk of receiving noise and erroneous signals increases
Solution Approach 1:
The object determination unit serves as an intermediary that filters and validates amplified reflected wave signals against image data. This intermediary processing stage reduces noise and erroneous signals by cross-validating detections, ensuring that only genuine vehicle reflections are identified while suppressing false positives from road surface reflections or other noise sources.
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 configuration enhances the accuracy of object detection by excluding reflections from non-object sources, ensuring precise vehicle positioning and improved control accuracy in adaptive cruise control systems.
Implementation Method 1
an object detection device periodically transmits probe waves such as millimeter waves over a predetermined range of angles around a vehicle, and detects an object around the vehicle upon receiving reflected waves
Implementation Method 2
reflected waves from the preceding vehicle's rear are weak
Data Source
AI summary
Provided is an object detection device (13) using a detection means (11) to transmit probe waves, receive reflected waves from an object (50) in a detection range, and acquire, as first detection information on the object, a position based on the reflected waves, to detect the object. The device includes an image information acquisition means, determination region setting means, and an object locating means. The image information acquisition means acquires, as second detection information on the object, a position based on an image of an area within the detection range, the image being captured by an image capturing means (12). The determination region setting means sets a determination region in the detection range. The object locating means locates the object, based on the first detection information, if pieces of the first and second detection information are present in the determination region.