Vehicle Radar Reflection-Surface Positioning From One Observation Pair
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Solution Overview
Problem
Existing vehicle radar systems cannot determine the position of a target when there is only one pair of observation points, as they rely on two pairs to calculate the target's position.
Innovation Solution
A vehicle radar system that includes multiple radars configured to observe different areas around the vehicle, a processing unit to detect and analyze observation data, and a target position determination section that calculates the surface direction of a reflection surface from a single observation point pair to determine the target's position, even when only one pair is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system uses two pairs of observation points to determine target position, then the position determination accuracy is improved, but the system cannot determine target position when only one pair is available
Solution Approach 1:
The patent transitions from relying solely on distance relationships (one-dimensional) to incorporating surface direction information (adding angular dimension). By calculating the surface direction of the reflection surface and using it to determine target position, the system can accurately locate targets even with a single observation point pair, thus resolving the contradiction between measurement precision and adaptability.
2Adaptability or versatility
If the system calculates surface direction from observation points, then target position can be determined with single observation pair, but the calculation complexity increases
Solution Approach 1:
The patent introduces the surface direction of the reflection surface as an intermediary parameter. Instead of directly calculating target position from observation points, the system first determines the surface direction and then uses it to find the target position. This intermediary approach simplifies the overall calculation process while enabling single-pair determination.
3Area of stationary object
If the system uses multiple radars to observe different areas, then the coverage area is improved, but the system complexity increases
Solution Approach 1:
The patent combines the observation data from multiple radars that cover different areas. By merging the detection results and coordinate information from multiple radar systems, the system achieves comprehensive area coverage while managing complexity through data integration rather than independent processing of each radar.
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 determination of the target's position using a single observation point pair, improving collision detection and prevention capabilities by calculating the surface direction and reflection angles, and providing early alarm information to the driver.
Implementation Method 1
at least one radar configured to observe areas around the vehicle and different from each other
Implementation Method 2
a detection apparatus which uses a mirror ghost caused by radar waves radiated from a radar and reflected from an obstruction such as a wall
Data Source
AI summary
A vehicle radar system includes at least one radar, a detection section, an extraction section, a pair determination section, and a target position determination section. The extraction section extracts at least one observation point pair from a plurality of detected observation points. The observation point pair is a pair of the observation points located in the same direction. The target position determination section calculates a surface direction of a reflection surface from a reflection surface observation point of the observation point pair and observation points around the reflection surface observation point, and determines a position of the target from the calculated surface direction and the at least one observation point pair.