Robotic Salvage Metal Cutting Using 3D Path Recognition
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Solution Overview
Problem
Conventional manual cutting of large decommissioned metal structures for recycling is labor-intensive, dangerous, and inefficient due to the unstructured nature of salvage operations, posing challenges for robotic automation.
Innovation Solution
A robotic cutting device with a mobile actuator and scanning logic that follows spray-painted cutting paths marked by workers, utilizing 3D curve reconstruction and spatial curve fitting techniques to autonomously execute cuts on irregularly shaped metal objects, minimizing human exposure to hazardous conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual cutting operations are used by workers, then flexibility and adaptability to irregular shapes are improved, but labor intensity and danger increase
Solution Approach 1:
The patent introduces spray-painted markings as an intermediary between human workers and the robotic cutting system. Workers mark desired cut locations on irregular metal structures, and the robotic system detects these markings through vision sensors to automatically execute cuts. This intermediary approach allows the system to adapt to irregular shapes through human expertise while eliminating direct human exposure to dangerous cutting operations.
Solution Approach 2:
The patent replaces manual mechanical cutting operations with an automated robotic cutting system. The robotic arm equipped with a cutting tool executes cuts based on detected spray-painted markings, substituting human workers who would otherwise directly operate cutting tools on irregular metal structures. This substitution maintains cutting flexibility while removing workers from hazardous environments.
2Extent of automation
If robotic automation is implemented, then labor intensity and danger are reduced, but difficulty in detecting and measuring irregular surfaces increases
Solution Approach 1:
The patent utilizes color contrast through spray-painted markings on metal surfaces to enable automatic detection of cutting paths. The spray paint creates visually distinct markings that the robotic vision system can easily detect and track, converting the complex problem of detecting cutting paths on irregular surfaces into a simpler color-based detection task. This approach works effectively on irregular metal surfaces where traditional measurement methods would be difficult.
3Ease of operation
If conventional manual operations are used, then ease of operation for simple tasks is improved, but productivity decreases
Solution Approach 1:
The patent implements a two-stage process where workers first perform the simple task of marking cutting locations with spray paint, and then the robotic system automatically executes the cutting operation. This preliminary action by workers enables the high-speed automated cutting phase, separating the simple marking task from the time-consuming cutting task. The approach maintains ease of operation for path planning while dramatically increasing cutting productivity through automation.
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 automates the cutting process by leveraging worker expertise, reducing labor intensity and danger while adapting to the irregular shapes and environments of salvage metal, enhancing efficiency and safety.
Implementation Method 1
traversing the cutting path based on optical recognition of the surface for generating a set of points defining the cutting path
Data Source
AI summary
A robotic cutting device includes a cutting tool responsive to a mobile actuator adapted to apply a cutting force in a 3-dimensional (3D) space, and scanning logic configured to identify a cutting path denoted on an article for cutting. Using the cutting path, a mobile actuator is responsive to positioning logic for disposing the cutting tool along the cutting path for performing a prescribed cut on the article. The mobile actuator is a robotic arm responsive to an independent coordinate frame based on a position and orientation of a mobility vehicle supporting the mobile actuator. The mobility vehicle is typically a tracked or all-terrain capable chassis adapted to be disposed adjacent to the article such that the article is within range of the actuator. The mobility vehicle transports the robotic cutting device adjacent to the article to be cut, such that the cutting path is within reach.