Vehicle Detection System Using Millimeter Wave Radar and Image Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle detection systems using millimeter wave radar often erroneously detect roadside objects as vehicles due to low signal reliability, leading to incorrect vehicle position determination.
Innovation Solution
A vehicle detection system that employs both a millimeter wave radar and an image sensor to detect first and second positions of an object, with the ECU determining if these positions belong to the same vehicle, and designating reliable calculated information for accurate vehicle detection, even when the first position is not detectable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle detection system continuously detects the vehicle based on low reliability signal positions, then the vehicle detection coverage is improved, but the erroneous detection rate increases
Solution Approach 1:
The system dynamically switches between first position (high reliability) and second position (low reliability) detection modes based on signal conditions. When the first position signal becomes weak or unavailable, the system transitions to using the second position, allowing continuous detection while managing reliability trade-offs adaptively
Solution Approach 2:
The system changes detection parameters by switching between different position detection modes (first position with high reliability threshold vs. second position with lower reliability threshold). This parameter change allows the system to maintain detection continuity while being aware of the reliability-precision trade-off
2Duration of action of stationary object
If the system uses the second position with lower reliability for continuous detection, then the detection continuity is improved, but the position accuracy deteriorates
Solution Approach 1:
The system prepares compensatory measures in advance by having the first position detection as a backup when the second position detection becomes unreliable. This prior cushioning ensures that when low reliability detection is needed for continuity, the system can switch to high reliability detection to correct or validate the position data
3Adaptability or versatility
If the system switches between first and second positions based on signal strength, then the detection robustness is improved, but the system complexity increases
Solution Approach 1:
The control logic dynamically adjusts which position to use based on real-time signal conditions, implementing a robust detection system that adapts to varying environmental conditions while managing complexity through rule-based switching rather than complex algorithms
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 approach reduces erroneous vehicle detection by utilizing the higher reliability of the first position when available and switching to the second position's information if necessary, ensuring continuous and accurate vehicle tracking.
Implementation Method 1
a millimeter wave radar to detect a first position in an object
Implementation Method 2
detects a vehicle traveling ahead of an own vehicle based on a position of an object detected by a millimeter wave radar
Data Source
AI summary
To provide a vehicle detection system capable of detecting a preceding vehicle traveling ahead of an own vehicle based on a position of an object by using an electromagnetic wave sensor while suppressing erroneous detection, an ECU determines if first and second positions detected by a millimeter wave radar are included in the same vehicle. The ECU designates calculated information of the preceding vehicle detected based on the first position as a calculation result if it determines that detection of the preceding vehicle is made based on the first position. The ECU uses calculated information of the preceding vehicle detected based on the second position as the calculation result when it determines that detection of the vehicle is not made based on the first position but the first and the second positions had been determined in the past as detected in the same vehicle.