Infrasonic Wake Vortex Detection for Air Traffic Density
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Solution Overview
Problem
Current aircraft separation standards result in costly air traffic density at airports due to the inability to effectively monitor and manage wake vortices, which can lead to hazardous encounters during takeoff and landing.
Innovation Solution
An all-weather operational wake vortex avoidance system using low-power infrasonic microphones and signal processing software to detect low-frequency emissions from wake vortices, with strategically placed detection stations and data acquisition systems that provide real-time data to air traffic controllers and pilots, utilizing geometric mean coherence for reliable detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aircraft separation standards are maintained to avoid wake vortex hazards, then safety is improved, but air traffic density and operational efficiency deteriorate
Solution Approach 1:
The system continuously monitors wake vortex conditions using infrasonic microphones and provides real-time feedback to air traffic controllers through a display system. This feedback mechanism allows dynamic adjustment of separation standards based on actual vortex presence and intensity, enabling safer reduction of separation distances when vortices are absent or weak, thereby improving air traffic density while maintaining safety
Solution Approach 2:
The patent replaces the traditional mechanical/time-based separation system with an acoustic detection system using infrasonic microphones that sense wake vortex low-frequency emissions. This substitution enables real-time detection of vortex conditions, allowing the system to dynamically determine safe separation distances based on actual atmospheric conditions rather than fixed time or distance intervals
2Measurement precision
If traditional wake vortex detection methods are used, then detection capability is limited, but system complexity and cost increase
Solution Approach 1:
The system replaces complex radar or laser-based detection systems with simple infrasonic microphones that detect low-frequency emissions from wake vortices. This substitution achieves effective wake vortex detection using low-cost, simple acoustic sensors that listen for the characteristic low-frequency sounds generated by rotating vortices, significantly reducing system complexity while maintaining detection capability
Solution Approach 2:
The system uses infrasonic microphones as intermediaries to detect wake vortices indirectly by sensing the low-frequency acoustic emissions naturally produced by the rotating vortex structure. This intermediary approach allows detection of the vortex presence and intensity without requiring direct visualization or complex interaction with the vortex itself, simplifying the detection system
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 system safely reduces aircraft separation distances by accurately monitoring the lifespan of wake vortices, ensuring safe takeoff and landing operations while complying with airport instrumentation constraints and providing all-weather service, thereby reducing operational costs and enhancing safety.
Implementation Method 1
measuring low-frequency emissions from aircraft wake vortices... low-power infrasonic microphones... configured for detecting low-frequency sound
Data Source
AI summary
A wake vortex avoidance system includes a microphone array configured to detect low frequency sounds. A signal processor determines a geometric mean coherence based on the detected low frequency sounds. A display displays wake vortices based on the determined geometric mean coherence.