Aircraft Power Line Detection Using AC/DC Electromagnetic Field Models
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Solution Overview
Problem
Existing aircraft collision avoidance systems for overhead transmission lines face challenges in accuracy and adaptability to harsh weather conditions, particularly for low-altitude flights, due to limitations in active and passive detection methods, including high power consumption, cost, and reduced effectiveness in adverse weather.
Innovation Solution
A flight anti-collision method and apparatus using electromagnetic field detection, distinguishing between AC and DC transmission lines, employs phase distribution models for AC lines and magnetic field intensity models for DC lines, integrating phase and magnetic field sensors to accurately determine the position relationship and control aircraft maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If active detection radar (laser radar or millimeter wave radar) is used for overhead transmission line detection, then detection capability is improved, but power consumption increases, cost increases, and device volume increases
Solution Approach 1:
The patent replaces active detection radar systems with passive electromagnetic field detection. Instead of transmitting electromagnetic waves and detecting reflections, the system uses electromagnetic field sensors to detect the electromagnetic fields naturally generated by current-carrying transmission lines. This substitution eliminates the need for high-power transmitters, reducing power consumption, cost, and device volume while maintaining detection capability.
2Measurement precision
If laser radar is used for overhead transmission line detection, then detection precision is improved, but the system is easily affected by bad weather
Solution Approach 1:
The patent substitutes laser-based optical detection with electromagnetic field detection. Electromagnetic fields penetrate fog, rain, and clouds that scatter or absorb laser beams. The sensors detect the electromagnetic fields generated by transmission line currents regardless of visual conditions, maintaining detection precision in bad weather while laser systems fail.
3Measurement precision
If image recognition is used for overhead transmission line detection, then detection capability is improved, but detection effectiveness is greatly reduced in bad weather and at night
Solution Approach 1:
The patent replaces optical image recognition systems with electromagnetic field detection sensors. Image recognition relies on visible or infrared light that is blocked by fog, rain, and darkness. Electromagnetic field sensors detect the fields generated by transmission line currents, which are unaffected by weather conditions or time of day, providing continuous detection capability.
4Measurement precision
If electromagnetic field detection is used for AC transmission lines, then detection accuracy is improved, but the model has inherent defects that reduce accuracy in certain scenarios
Solution Approach 1:
The patent segments the detection system into two distinct models: one for AC transmission lines using phase distribution characteristics, and another for DC transmission lines using magnetic field intensity distribution. This segmentation allows each model to be optimized for its specific application, improving reliability by selecting the appropriate model based on the transmission line type rather than using a single imperfect model for both.
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 flight safety by providing precise collision avoidance in diverse scenarios, complementing the strengths of different models to overcome inherent defects, ensuring accurate detection and response in complex environments.
Implementation Method 1
determining whether an overhead transmission line around is an Alternating Current (AC) transmission line or a Direct Current (DC) transmission line on the basis of an output of a resonant circuit on an aircraft
Implementation Method 2
a phase distribution model and an electric field phase and a magnetic field phase measured by a phase detector on the aircraft
Implementation Method 3
a magnetic field intensity distribution model and the magnetic field intensities collected by magnetic field intensity sensors on the aircraft
Data Source
AI summary
The present disclosure provides a flight anti-collision method and apparatus based on electromagnetic field detection of an overhead transmission line. An example method includes: determining whether an overhead transmission line around is an Alternating Current (AC) transmission line or a (Direct Current) DC transmission line; if the overhead transmission line is an AC transmission line, determining a position relationship between an aircraft and the overhead transmission line on the basis of a phase distribution model and an electric field phase and a magnetic field phase measured by a phase detector on the aircraft; if the overhead transmission line around is a DC transmission line, determining the position relationship between the aircraft and the overhead transmission line on the basis of a magnetic field intensity distribution model and the magnetic field intensities collected by magnetic field intensity sensors on the aircraft; and thus controlling the aircraft.