Microwave Ground Heating System With Sealing Shroud
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Solution Overview
Problem
Conventional methods for thawing frozen ground and repairing asphalt roads are inefficient, energy-intensive, and pose health risks due to lack of control over microwave radiation, requiring extensive ground preparation and drilling, and existing microwave systems are either low-frequency or large and uncontrolled.
Innovation Solution
A portable microwave generation unit with a waveguide and sealing shroud that directs 915 MHz microwaves into the ground or road surface, utilizing a microprocessor-controlled system to monitor and minimize radiation leakage, eliminating the need for pre-drilling and ensuring safe and precise heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (gas, steam, heated water) are used to thaw frozen ground, then the ground can be thawed, but the process is very slow and uses an extreme amount of energy
Solution Approach 1:
The patent replaces conventional thermal conduction methods (gas, steam, heated water) with microwave electromagnetic radiation for ground thawing. The microwave generation unit directly heats the frozen ground through electromagnetic energy absorption, eliminating the need for intermediate heating media and dramatically reducing both thawing time and overall energy consumption.
Solution Approach 2:
The patent changes the frequency parameter of microwave radiation to 915 MHz, which is specifically optimized for ground thawing applications. This frequency allows deep penetration into frozen ground while maximizing heating efficiency, thereby improving productivity without excessive energy consumption.
2Object-affected harmful factors
If predrilled holes are made for probe placement to minimize radiation leakage, then microwave radiation leakage is reduced, but the ground preparation takes as much or more time and energy than thawing itself
Solution Approach 1:
The patent extracts the microwave generation unit from the ground (unlike probe methods that require insertion) and positions it above the ground surface. The unit directs microwave energy downward through a waveguide, eliminating the need for predrilling holes while still achieving effective thawing and minimizing radiation leakage through proper shielding design.
Solution Approach 2:
The patent introduces a waveguide as an intermediary component between the microwave source and the ground. The waveguide directs and confines the microwave energy, allowing the unit to be positioned above ground without requiring hole drilling, thereby eliminating ground preparation time while maintaining radiation control.
3Ease of operation
If microwave systems are made mobile for introducing microwave energy to the ground surface, then the system can be deployed flexibly, but the system lacks control in directing microwave radiation to the ground
Solution Approach 1:
The patent designs the microwave generation unit as a mobile system that can be positioned and oriented dynamically at different locations. The unit includes adjustable components that allow operators to precisely direct microwave radiation at the ground target, combining mobility with precise directional control through mechanical adjustment capabilities.
4Power
If large microwave systems are used for road repair, then sufficient power is provided, but the system is large and fails to address control of microwave radiation
Solution Approach 1:
The patent segments the microwave generation system into modular components: a compact microwave source, a directional waveguide, and a shielding assembly. This segmentation allows the system to deliver high power (1-100 kW at 915 MHz) while maintaining a compact, manageable size and enabling precise control of radiation direction through the waveguide 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 thaws frozen ground and repairs asphalt roads quickly and safely, reducing energy consumption and operational costs, while allowing for year-round maintenance and effective pest control and water treatment.
Implementation Method 1
A portable microwave generation unit with a waveguide and sealing shroud that directs 915 MHz microwaves into the ground or road surface
Implementation Method 2
The system efficiently thaws frozen ground and repairs asphalt roads quickly and safely
Data Source
AI summary
A microwave ground or road surface heating system that eliminates the need for preparation of the surface to be heated while preventing leakage of microwave radiation. The highly portable microwave heating system prevents leakage of microwave radiation via a microwave horn and sealing shroud configuration that seals the unit to the surface being heated.