Robotic Arm Waveguide for Efficient Microwave Rock Fracturing
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Solution Overview
Problem
Existing microwave-based rock excavation methods are not commercially viable due to complexity and cost, and there is a need for improved systems and methods to efficiently deliver microwave energy to rock surfaces for thermal fracturing.
Innovation Solution
A system comprising a microwave generator, an articulable robotic arm with rotatably connected rigid waveguide segments, and an applicator that moves along the rock face to deliver microwaves, controlled by a robotic control system, which adjusts movement and energy output based on sensor feedback to optimize thermal fracturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If microwave energy is applied to rock for thermal fracturing, then rock hardness is reduced and excavation energy requirement is decreased, but system complexity and cost increase due to existing solutions
Solution Approach 1:
The waveguide is divided into multiple rigid segments that are rotatably connected, allowing the system to reach different positions on the rock face while maintaining microwave transmission capability. This segmentation enables a simpler, more modular system architecture compared to existing complex solutions.
Solution Approach 2:
The waveguide segments are made rotatable to create a dynamic, articulable structure that can adapt its position and orientation. This dynamic capability allows the system to efficiently treat rock surfaces at various angles and positions without requiring complex repositioning mechanisms.
2Productivity
If microwave energy is applied to rock for thermal fracturing, then rock hardness is reduced and excavation efficiency is improved, but cost increases due to existing solutions
Solution Approach 1:
The modular segmented waveguide structure reduces manufacturing costs and simplifies maintenance compared to existing complex systems. Each segment can be independently manufactured and replaced if needed, lowering overall system cost while maintaining excavation efficiency.
Solution Approach 2:
The system allows adjustment of microwave energy parameters and waveguide positioning to optimize treatment effectiveness for different rock types and conditions, improving excavation efficiency without requiring expensive specialized equipment for each scenario.
3Use of energy by moving object
If microwave energy is delivered to rock surface, then thermal fracturing occurs and rock is weakened, but energy loss increases without proper impedance matching
Solution Approach 1:
The waveguide structure and applicator design are optimized to match impedance between the microwave source and the rock target, minimizing energy reflection and loss. This parameter optimization ensures maximum energy transfer efficiency without requiring complex additional components.
4Area of stationary object
If robotic arm moves applicator along rock face, then treatment coverage is improved, but system complexity increases
Solution Approach 1:
The robotic arm uses rotatably connected waveguide segments rather than a single complex articulated mechanism, simplifying the overall system while still achieving comprehensive rock face coverage through coordinated rotation of the segmented structure.
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 efficiently delivers microwave energy for thermal fracturing, reducing rock hardness and requiring less energy for excavation, with minimal energy loss and improved efficiency through impedance matching and focused beam application.
Implementation Method 1
A system for excavating a rock face using microwaves includes a microwave generator for producing microwaves
Implementation Method 2
the applicator focus the microwaves to produce a microwave beam at the rock face
Implementation Method 3
The application of microwaves to rock may serve to weaken certain types of rock, including those frequently encountered during excavation and mining, by inducing fractures within the rock. These fractures form based on the tremendous stresses and strains created by differential thermal expansion of the rock
Data Source
AI summary
A system for excavating a rock face using microwaves. The system may include a microwave generator, an articulable robotic arm with a plurality of rotatably connected rigid waveguide segments, an applicator attached to a distal end of the robotic arm, and a robotic control system. The system produces microwaves with the microwave generator and moves the robotic arm such that the applicator moves along the rock face as the microwaves exit the applicator to precondition the rock face for excavation. Various patterns of microwave treatment, and controls based on sensor feedback, may be implemented.