Single Radar System for Multi-Approach Intersection Detection
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Solution Overview
Problem
Current radar systems for traffic intersections require multiple sensors installed at each approach, leading to high costs and complexity, especially for small- and medium-sized intersections, as they can only detect targets on a single approach.
Innovation Solution
A single radar system positioned at a single location with multiple antennas configured to receive data from all traffic entrances, using MIMO techniques for precise detection and calibration to provide comprehensive data on traffic flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radar sensors are installed at each approach to detect targets, then detection coverage is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a single radar sensor that performs multiple functions by detecting targets on multiple approaches simultaneously. The radar system uses beamforming technology to create multiple detectable zones covering different approaches to the intersection, allowing one sensor to replace what would traditionally require multiple sensors. This multi-functional approach maintains detection coverage while reducing the number of devices needed.
Solution Approach 2:
The patent combines multiple detection functions into a single radar sensor located at one intersection corner. By merging the detection capabilities that would traditionally be distributed across multiple sensors at different locations, the system achieves comprehensive coverage of multiple approaches while simplifying installation and reducing equipment quantity.
2Measurement precision
If multiple radar sensors are installed at each approach, then detection precision is improved, but installation and maintenance costs increase
Solution Approach 1:
The single radar sensor is designed to maintain precision target detection across multiple approaches simultaneously. Through advanced signal processing and beamforming, the system achieves measurement precision comparable to multiple sensors while reducing installation and maintenance requirements to a single device location.
3Device complexity
If a single radar sensor is used at one location, then device complexity and cost are reduced, but detection coverage is limited
Solution Approach 1:
The patent extends the detection capability of a single radar sensor across multiple spatial dimensions by using beamforming to create detectable zones in different directions. The system processes signals from multiple antenna elements to form beams that cover multiple approaches, effectively using dimensional expansion in signal space to achieve multi-directional coverage from a single physical location.
Solution Approach 2:
The radar system dynamically adjusts its beamforming patterns to track and detect targets across different approaches. By dynamically steering electronic beams toward detected targets and adjusting detection zones in real-time, the single sensor maintains comprehensive coverage adaptability without requiring physical repositioning or multiple fixed sensors.
4Loss of information
If multiple sensors are deployed across different locations, then comprehensive traffic data is obtained, but system coordination complexity increases
Solution Approach 1:
The patent merges multiple detection functions into a single radar sensor, eliminating the coordination complexity inherent in synchronizing multiple distributed sensors. The single sensor inherently provides unified temporal and spatial reference for all detected targets, simplifying data integration and coordination while maintaining complete traffic information across all approaches.
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
Reduces installation and maintenance costs by requiring fewer devices and cables, while providing rich data for optimized traffic signal control and improved traffic flow analysis.
Implementation Method 1
An example radar sensor for detection of vehicles and other users of an intersection is described in U.S. Pat. No. 7,889,097
Data Source
AI summary
A radar system for monitoring vehicles on a roadway comprises a radar control unit a radar subsystem including one or more antennas. The radar subsystem is in communication with the radar control unit. The radar system is configured to be positioned with the one or more antennas at a single position relative to an intersection. Additionally, the radar system is configured to receive radar data from all traffic entrances into the intersection using the radar subsystem.