Magnetic Drone-Crawler Surface Prep for Hard-to-Reach Steel

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Solution Overview

Problem

The process of preparing metal surfaces for painting in corrosive environments is hazardous for humans due to the need for manual intervention, which increases the risk of accidents and reduces operational efficiency, especially in hard-to-reach locations, and existing robotic solutions lack effective positioning and movement systems.

Innovation Solution

A drone-crawler system comprising a crawler with magnetic adhesion and a drone that can operate in coupled and decoupled configurations, allowing autonomous or remote-controlled surface preparation, positioning, and transport without human intervention, using a crawler that adheres to ferromagnetic metal surfaces at any angle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual surface preparation is used, then operational flexibility is maintained, but human safety is compromised and productivity is reduced

Engineering Contradiction:

Improvehuman safetyVSAvoidoperational efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent replaces manual mechanical surface preparation with an automated crawler robot equipped with abrasive tools. The robot autonomously performs surface preparation tasks that would otherwise require human workers to manually operate tools on metal structures, thereby eliminating human exposure to hazardous environments while maintaining operational efficiency through continuous automated work.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The crawler robot is designed to autonomously navigate and operate on metal surfaces without human intervention. The system includes self-contained power supplies, control systems, and abrasive tooling that enable the robot to perform surface preparation independently, replacing the need for human workers to manually perform these tasks while maintaining productivity.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If scaffolds or suspended platforms are installed to access hard-to-reach locations, then surface preparation can be performed, but operational complexity increases and productivity decreases

Engineering Contradiction:

Improveaccess to hard-to-reach locationsVSAvoidscaffold installation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical system of scaffolds and suspended platforms with an automated crawler robot that can directly access and navigate hard-to-reach locations on metal structures. The robot uses its own locomotion system to reach areas that would otherwise require complex scaffold installations, thereby reducing operational complexity while maintaining adaptability to various access requirements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Extent of automation

If conventional crawler robots are used, then human intervention is reduced, but positioning and movement capability is insufficient

Engineering Contradiction:

Improveautomation levelVSAvoidpositioning and movement capability

Core Design Contradiction:

Extent of automationVSEase of operation

Solution Approach 1:

The patent incorporates sensors and control systems that provide real-time feedback on the crawler robot's position and movement. This feedback mechanism enables the robot to accurately navigate and position itself on metal surfaces, improving positioning and movement capability while maintaining high automation levels. The control system adjusts robot behavior based on sensor input to ensure precise operation.

Inventive Principle:

Principle #23Feedback

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 significantly reduces human exposure to risk and enhances operational efficiency by automating surface preparation, ensuring better paint adhesion and reducing variability in surface roughness, while maintaining safety and productivity.

Implementation Method 1

magnetic adhesion means (111, 271) capable of allowing the crawler to adhere to ferromagnetic metal surfaces at any angle relative to the ground

Methodology Applied

Scientific EffectMagnetic adhesion: Magnetism

Data Source

PatentUS20260077384A1Drone-crawler system for metal surface preparation

Publication Date: 2026.03.19 PETROLEO BRASILEIRO SA PETROBRAS

AI summary

The present application relates to a drone-crawler system for preparing ferromagnetic metal surfaces, comprising a crawler and a drone that operate in coupled and decoupled configurations. The system includes a control system that operates the crawler autonomously or via remote control, a flight control system that operates the drone autonomously or via remote control, a crawler coupling and decoupling system, an adhesion system for ferromagnetic metal surfaces that keeps the crawler fixed to ferromagnetic metal surfaces at any angle relative to the ground, a locomotion system that moves the crawler across any ferromagnetic surface, a surface preparation system that prepares ferromagnetic metal surfaces for subsequent coating application, a decoupling system for ferromagnetic metal surfaces that nullifies the magnetic adhesion force exerted by the magnetic adhesion system, and a coupling system for ferromagnetic metal surfaces that maintains and releases the drone from rest on ferromagnetic metal surfaces.