Autonomous Power Line Detection Using Electric and Magnetic Field Sensors
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Solution Overview
Problem
Current power line detection systems for helicopters and UAVs are bulky, energy inefficient, and fail to accurately identify power lines, especially three-phase lines, leading to a significant risk of collisions and accidents.
Innovation Solution
A lightweight, low-power system using electric and magnetic field sensors to detect and orient power lines by measuring and processing electric and magnetic field data, including derivatives and the Poynting vector, to reduce false positives and enable autonomous avoidance and navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar- or laser-based active systems are used to detect power lines, then detection capability is improved, but the systems become bulky, expensive, and energy inefficient
Solution Approach 1:
The patent replaces active radar or laser-based detection systems with passive electric and magnetic field sensors. This substitution eliminates the need for bulky transmitters and receivers, significantly reducing system weight, power consumption, and cost while maintaining effective power line detection capability through electromagnetic field sensing.
Solution Approach 2:
Instead of using complex active sensing systems, the patent employs simple passive sensors that detect the electromagnetic fields naturally emitted by power lines. This approach creates a simplified copy of the detection function using fundamentally different, less complex physical principles.
2Device complexity
If simple passive electric- or magnetic-field sensors are used, then device complexity is reduced, but detection accuracy fails near three-phase power lines and false positives occur
Solution Approach 1:
The patent combines both electric field sensors and magnetic field sensors into a single detection system. By merging these two sensing modalities, the system achieves superior detection accuracy near three-phase power lines while maintaining simplicity, as the complementary nature of electric and magnetic field measurements eliminates false positives that occur with either sensor type alone.
Solution Approach 2:
The detection system uses a composite sensing approach, combining electric field sensing capability with magnetic field sensing capability. This composite sensor system leverages the strengths of both sensor types to achieve robust power line detection in complex electromagnetic environments where single-sensor systems fail.
3Device complexity
If only single sensor type is used for detection, then device complexity is reduced, but false positives cannot be eliminated
Solution Approach 1:
The patent merges electric field sensing and magnetic field sensing into an integrated detection system. This combination allows the system to cross-validate measurements and eliminate false positives that occur with single-sensor systems, significantly improving detection reliability while maintaining relatively simple device architecture.
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 effectively detects and avoids power lines, reducing the risk of collisions and providing accurate orientation for navigation, even in complex electromagnetic environments, thereby enhancing safety and operational efficiency.
Implementation Method 1
measuring, with sensors located on the aerial craft, electric and magnetic fields in the space
Implementation Method 2
measuring, with sensors located on the aerial craft, electric and magnetic fields in the space
Implementation Method 3
The Poynting vector is the cross product of the electric field and magnetic field and is parallel or nearly parallel to the lines
Data Source
AI summary
Embodiments of the present invention relate to power line detection, and more particularly, to methods and systems for autonomous power line detection, avoidance, navigation, and inspection. They may be implemented using aerial crafts, but do not have to. According to an embodiment, a method for detecting energized power lines in ambient space in the vicinity of an aerial craft is presented. The method includes measuring, with sensors located on the aerial craft, electric and magnetic fields in the space; and with a power line detection controller, detecting an energized power line in the space in the vicinity of the aerial craft using the sensor data; and determining the orientation of the detected energized power line in the space based on the electric and magnetic field measurements. Similar methods and systems are also presented.