Perching UAV and Releasable Crawler for Contact Pipe Inspection
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Solution Overview
Problem
The inspection and maintenance of exposed metallic assets, such as pipes and storage tanks, are challenging for humans due to accessibility issues, and existing UAVs struggle with performing complete circumferential scans effectively.
Innovation Solution
A perching UAV with a releasable crawler that magnetically attaches to ferromagnetic surfaces, allowing it to land and deploy a magnetic crawler for detailed inspections and maintenance, equipped with a rotating arm and docking station for versatile positioning and ultrasonic testing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional UAV hovers at a distance from the asset, then it can maintain stable flight, but it cannot perform direct contact inspection and maintenance tasks
Solution Approach 1:
The system divides the inspection function into two segments: a UAV for approach and positioning, and a separate crawler for direct contact inspection. The crawler detaches from the UAV and independently crawls on the asset surface, allowing the UAV to maintain stable flight while the crawler performs detailed inspection tasks requiring direct contact.
Solution Approach 2:
The crawler acts as an intermediary between the UAV and the asset. It transfers the inspection function from the aerial UAV to the surface-level crawler, enabling direct contact inspection while the UAV remains in a stable hovering or perching position.
2Reliability
If a UAV maneuvers directly on the asset surface, then it can perform inspection tasks, but it consumes excessive energy and risks collision
Solution Approach 1:
The system separates the high-energy flight function (UAV) from the low-energy surface traversal function (crawler). The UAV performs efficient aerial navigation and positions itself near the asset, then releases the crawler which uses passive magnetic attachment and low-power motors to traverse the asset surface, dramatically reducing overall energy consumption.
Solution Approach 2:
The system replaces active mechanical propulsion on the asset surface with passive magnetic attachment. The crawler uses magnetic feet to attach to and move along ferromagnetic assets, eliminating the need for high-power motors and complex mechanical drive systems that would be required for traditional UAV-based surface maneuvering.
3Reliability
If a complete circumferential scan of a pipe is performed using a hovering drone, then the drone maintains stable position, but the inspection quality is insufficient due to lack of direct contact
Solution Approach 1:
The inspection system is segmented into a UAV component for positioning and a crawler component for detailed scanning. The crawler includes integrated inspection sensors that require direct contact with the asset surface, ensuring high-quality inspection data while the UAV handles the complex task of positioning and releasing the crawler at the correct location.
Solution Approach 2:
The crawler serves as an intermediary that bridges the gap between aerial UAV inspection and surface-level detailed scanning. It carries inspection equipment requiring direct contact and transfers this capability to the asset surface, enabling complete circumferential scans with high inspection quality.
4Measurement precision
If human inspectors perform maintenance on elevated metallic assets, then detailed inspection can be conducted, but safety risks and accessibility issues arise
Solution Approach 1:
The system enables autonomous inspection without human intervention on the asset itself. The UAV autonomously navigates to the asset, positions the crawler, releases it for inspection, and retrieves it afterward. This eliminates safety risks associated with human inspectors working at heights while maintaining inspection accuracy through the crawler's direct contact sensing capabilities.
Solution Approach 2:
The system replaces human mechanical inspection with automated magnetic crawler-based inspection. The crawler's magnetic attachment mechanism provides stable contact with the asset surface, ensuring consistent and accurate measurements while eliminating all safety risks associated with human presence on elevated or difficult-to-access assets.
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
Enables efficient and stable inspection and maintenance of curved and vertical surfaces, reducing energy consumption and safety risks while providing accurate ultrasonic testing results, overcoming the limitations of traditional UAVs in accessing elevated assets.
Implementation Method 1
magnetic feet at a first end of the rotating arm and configured to perch and magnetically attach the UAV to a ferromagnetic surface
Implementation Method 2
a battery at a second end of the rotating arm opposite the first end and configured to supply power to the motors and the housed electronics
Implementation Method 3
a rotating arm pivotably coupled to the fixed frame at a central axis between the propellers and configured to rotate with respect to the fixed frame about the central axis
Data Source
AI summary
An unmanned aerial vehicle (UAV) a fixed frame and a rotating arm pivotably coupled to the fixed frame at a central axis. The fixed frame includes peripheral propellers and corresponding motors for flying the UAV, and a central electronics enclosure for housing electronics used to control the UAV. The rotating arm is between the propellers and configured to rotate with respect to the fixed frame about the central axis. The rotating arm includes magnetic feet at a first end of the rotating arm and configured to perch and magnetically attach the UAV to a ferromagnetic surface, a docking station at the first end and configured to release and dock a releasable crawler, and a battery at a second end of the rotating arm opposite the first end and configured to supply power to the motors and the housed electronics, and to counterbalance the first end about the central axis.