Radar Apparatus Bin Segmentation for Continuous Object Detection
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Solution Overview
Problem
Existing radar apparatuses face challenges in accurately detecting the area of target objects due to varying radio wave reflection strengths and difficulties in detecting spatially continuous objects like walls or curbs, leading to reduced detection accuracy.
Innovation Solution
A radar apparatus that includes a distance detecting part to identify the existence distance bin, a direction detecting process to determine the direction of the target object in adjacent bins, and an existence area detecting part to calculate the area based on signal strengths and phases, ensuring accurate detection even with varying reflection strengths and continuous objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If reflection points are detected from signals with maximum reception strength levels at respective antennas, then the detection process is simplified, but the detection accuracy of reflection points is reduced and the area of the target object cannot be detected with high accuracy
Solution Approach 1:
The patent segments the detection process into two distinct parts: a distance detecting part that identifies the existence distance bin, and a direction detecting process executing part that performs direction detection only for distance bins other than the existence distance bin when a predetermined criterion is met. This segmentation allows the system to handle different detection scenarios optimally, improving accuracy without excessive complexity.
Solution Approach 2:
The patent dynamically adjusts the detection approach based on the detection scenario. When the target object exists in a spatially continued manner (detected by the distance detecting part), the system selectively executes the direction detecting process only for non-existence distance bins. This dynamic adaptation optimizes detection accuracy for both point targets and continuous objects.
2Ease of operation
If reflection points are detected from signals with maximum reception strength levels at respective antennas, then the detection method is straightforward, but reflection points cannot be detected for spatially continued objects such as walls or curbs
Solution Approach 1:
The patent divides the detection space into distance bins and identifies an existence distance bin where the target object is detected. This segmentation enables the system to recognize when a target object exists in a spatially continued manner, allowing reliable detection of walls and curbs that would otherwise be missed by simple maximum strength detection.
Solution Approach 2:
The system dynamically determines whether to execute the direction detecting process based on the criterion whether the current distance bin is the existence distance bin. This dynamic control ensures that detection is performed appropriately for both discrete targets and continuous objects, maintaining reliability across different target types.
3Measurement precision
If direction detection is performed for all distance bins, then all potential reflection points are identified, but the detection process becomes more complex and time-consuming
Solution Approach 1:
The patent extracts and identifies the existence distance bin where the target object is detected, then removes this bin from the set of bins requiring direction detection. By taking out the existence distance bin from the detection process, the system avoids redundant direction detection operations, reducing processing time while maintaining complete reflection point identification.
Solution Approach 2:
Instead of performing direction detection for all distance bins (excessive action), the patent performs direction detection only for distance bins other than the existence distance bin (partial action). This partial detection approach is sufficient because the existence distance bin is already identified by the distance detecting part, eliminating the need for redundant direction detection.
4Measurement precision
If the radio wave beam width is narrow, then the detection resolution is improved, but the reflection strength varies significantly depending on the reflection surface status
Solution Approach 1:
The patent segments the detection process to separate distance detection from direction detection. This segmentation allows the system to handle variations in reflection strength by identifying the existence distance bin first, then performing direction detection only where necessary, thereby maintaining detection resolution while compensating for reflection strength variations.
Solution Approach 2:
The patent changes the detection parameter from relying solely on reception strength level to using a two-stage process: first detecting existence distance bin, then detecting direction for non-existence bins. This parameter change allows the system to maintain narrow beam width for resolution while handling reflection strength variations through the existence distance bin identification.
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
The radar apparatus achieves high accuracy in detecting the area of target objects by identifying plural reflection points defined by distances and directions, effectively handling varying reflection strengths and continuous objects.
Implementation Method 1
a radar apparatus which detects the target object by transmitting a radio wave and receiving a reflected wave of the transmitted radio wave generated by the reflection on the target object
Data Source
AI summary
A radar apparatus is disclosed which includes: a distance detecting part configured to detect, among plural bins, an existence distance bin in which the target object exists, a direction detecting process executing part configured to execute a process of detecting a direction in which the target object exists, with respect to a distance bin other than the existence distance bin detected by the distance detecting part, among plural bins from which relative distances to the target object can be calculated, if a predetermined criterion is met; an existence area detecting part configured to detect, based on an execution result of the direction detecting process executing part, an area in which the target object exists.