Phased-Array Radar Obstacle Detection in Low Visibility
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Solution Overview
Problem
Vehicles, particularly trains, face challenges in detecting obstacles in low visibility conditions, leading to potential collisions and economic losses due to reduced speed and delays, which existing systems fail to address effectively.
Innovation Solution
A radar-based system using phased array antenna units for obstacle detection, combined with optical imaging, to generate reflection maps and alert systems for potential interfering objects, enabling high-resolution scanning up to 5 km ahead of the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar-based systems with phased array antenna units are used for obstacle detection, then detection precision and range are improved, but device complexity increases
Solution Approach 1:
The radar system is divided into multiple phased array antenna units, each independently capable of transmitting and receiving signals. This segmentation allows the system to achieve high detection precision through coordinated operation of multiple simpler units rather than requiring a single complex antenna system.
Solution Approach 2:
The patent introduces a control unit that acts as an intermediary between the multiple antenna units and the processing system. This control unit coordinates the operation of antenna units, manages signal reception and transmission, and processes radar data, thereby simplifying the overall system architecture while maintaining high detection capabilities.
2Reliability
If train velocity is reduced in poor visibility conditions, then safety is improved, but productivity decreases
Solution Approach 1:
The radar system performs preliminary detection of obstacles at long ranges (up to several kilometers) before the train reaches them. By detecting obstacles early in poor visibility conditions when optical systems fail, the system provides advance warning that allows operators to take preventive action, maintaining both safety and efficient train operation.
Solution Approach 2:
The patent replaces optical-based detection systems (cameras, visual inspection) with radar-based electromagnetic detection. This substitution enables obstacle detection in adverse weather conditions including fog, rain, and snow where optical systems are ineffective, thereby maintaining safety without requiring velocity reduction.
3Measurement precision
If optical imaging units are added to the system, then object classification accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines radar-based detection units with optical imaging units into an integrated system. The radar units provide initial obstacle detection and tracking, while optical imaging units capture visual data for classification. The control unit merges data from both systems, using radar information to guide optical imaging and vice versa, achieving accurate object classification without requiring either system to operate independently at full capacity.
Solution Approach 2:
The system implements feedback loops where radar detection results inform optical imaging operations and classification outcomes refine radar tracking. The control unit continuously processes feedback from both radar and optical systems, adjusting detection parameters and classification algorithms to improve accuracy while optimizing resource utilization and managing system complexity.
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
Enhances obstacle detection and classification, reducing the risk of collisions by providing accurate alerts and enabling safe navigation in adverse weather conditions.
Implementation Method 1
The radar unit transmits signals to a region of interest, which includes an expected trajectory of the vehicle and certain region around it and collected reflected signals to provide data on the region of interest
Implementation Method 2
The radar unit transmits signals to a region of interest... and collected reflected signals
Data Source
AI summary
A system and corresponding method are described, for use in alerting on objects in path of vehicle's propagation. The system comprising RF transmission/reception unit comprising at least one phased array antenna unit, and a control unit. The RF transmission/reception unit is configured for periodically scanning a selected region by transmission of interrogating RF signal and collecting reflected RF signals from the selected region and generate based thereon pattern data indicative of the collected RF signal, and for transmitting the pattern data to the control unit. The control unit is configured and operable for processing the pattern data for determining existence of interfering object in path of propagation of a vehicle carrying the system, and for generating alert data indicative of existence of one or more interfering objects.