Vehicle Object Detection Shielding Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle object detection systems inaccurately detect stationary obstacles as moving due to partial shielding by other objects, leading to erroneous movement state assessments.
Innovation Solution
An object detection device and method that includes a transmission and reception unit for electromagnetic waves, a reflecting point computation unit, a distance computation unit, an end point detection unit, a shielding determination unit, and an end point movement speed computation unit to accurately determine the movement state of objects, even when partially shielded, by computing the lateral movement speed of end points and determining the presence of stationary objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar device detects obstacle based on reflected wave, then obstacle detection capability is improved, but detection accuracy deteriorates when obstacle is partially shielded by another object
Solution Approach 1:
The patent segments the obstacle detection task by identifying and separately analyzing multiple reflecting points on the obstacle surface. By dividing the obstacle into multiple reflection sources and tracking their individual movements, the system can distinguish between actual obstacle movement and apparent movement caused by shielding effects, thereby resolving the contradiction between detection capability and measurement precision
Solution Approach 2:
The patent introduces reflecting point computation as an intermediary step between radar signal reception and obstacle movement determination. By computing specific reflecting points and using them as intermediate reference markers, the system can accurately track obstacle movement even when partially shielded, as these computed points provide stable reference data that is not affected by shielding-induced variations in overall obstacle appearance
2Ease of operation
If end point or center of gravity of obstacle is used to detect movement, then movement detection is simplified, but false detection of stationary obstacle as moving occurs when shielded
Solution Approach 1:
Instead of treating the obstacle as a single entity with one center of gravity or end point, the patent segments it into multiple reflecting points. By tracking the movement of these segmented points individually, the system maintains simplicity in detection methodology while eliminating false positives caused by shielding, as each reflecting point's movement can be independently verified
Solution Approach 2:
The patent uses multiple reflecting points beyond the minimal single center of gravity approach. This excessive use of reference points ensures that even if some points are affected by shielding, others remain reliable indicators of true obstacle movement, thereby maintaining detection simplicity while improving accuracy through redundant measurement
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
Enables accurate detection of the halt and lateral movement state of objects, preventing false collision determinations and ensuring reliable vehicle control by correctly identifying stationary objects obscured by other objects.
Implementation Method 1
a transmission and reception unit that transmits an electromagnetic wave, and receives a reflected wave which is generated when the electromagnetic wave is reflected by an object around a subject vehicle
Data Source
AI summary
An object detection device for a vehicle includes a transmission and reception unit that transmits an electromagnetic wave and receives a reflected wave, a reflecting point computation unit that computes a position of a reflecting point of the electromagnetic wave on the object, a distance computation unit that computes a distance from the subject vehicle to the object, an end point detection unit that detects at least one of an end point on the right side of the object and an end point on the left side thereof, a shielding determination unit that determines whether the end point of the object is shielded by another object when viewed from the subject vehicle, and an end point movement speed computation unit that computes a lateral movement speed of the end point of the object determined as not being shielded.