Optical Video Communication for Autonomous Underground Mining
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Solution Overview
Problem
Existing real-time video communication systems in mining environments, such as those using Ethernet and Wi-Fi, are insufficient to ensure safety and efficiency in resource exploration without human presence, as they do not adequately address the unique challenges of underground mining environments, including electromagnetic interference and the need for real-time supervision.
Innovation Solution
An autonomous mining system utilizing a combination of Ethernet and optical wireless communication (OWC) protocols, including ultraviolet light-based non-line-of-sight communication, to transmit video streams and control commands between underground and above-ground systems, enabling real-time supervision and control of mobile nodes for resource extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional radio frequency communication technologies (Wi-Fi, leaky feeder) are used in coal mines, then the system can be implemented with existing infrastructure, but the communication reliability deteriorates due to electromagnetic interference and signal attenuation in underground environments
Solution Approach 1:
The patent replaces radio frequency electromagnetic communication with optical communication using LED or laser diodes. This substitution eliminates susceptibility to RF electromagnetic interference while leveraging the unique mine environment characteristics (solid-state lighting infrastructure, absence of natural light interference) to achieve reliable communication in underground coal mines
Solution Approach 2:
The patent changes the communication wavelength parameter from radio frequency to optical spectrum (visible or infrared light). This parameter change allows the system to operate in the electromagnetic spectrum range that is not affected by RF interference and can penetrate mine environments more effectively
2Reliability
If human presence is maintained in mines for resource exploration, then real-time supervision is possible, but safety risks increase due to exposure to hazardous mining environments
Solution Approach 1:
The patent implements autonomous mobile nodes equipped with sensors, processors, and actuators that can independently perform resource exploration tasks. These nodes autonomously navigate, detect resources, and execute extraction operations based on pre-programmed algorithms, eliminating the need for human presence in hazardous mine environments while maintaining operational capability
Solution Approach 2:
The patent introduces optical communication as an intermediary between the control center and autonomous mobile nodes. This intermediary enables real-time transmission of video streams and control commands through the hazardous environment without requiring human physical presence, bridging the gap between supervision and autonomous execution
3Loss of information
If real-time video monitoring is implemented in mines, then supervision capability is improved, but the system complexity increases due to the need for robust communication infrastructure in harsh environments
Solution Approach 1:
The patent integrates multiple functions into the mobile nodes and communication infrastructure. The optical communication system simultaneously serves for video transmission, control commands, and environmental monitoring. The mobile nodes combine exploration, detection, and execution capabilities in single autonomous units, reducing overall system complexity while maintaining real-time supervision quality
Solution Approach 2:
The patent replaces complex RF communication infrastructure with optical communication using existing solid-state lighting infrastructure in mines. This substitution simplifies the communication system by leveraging already-deployed LED or laser diodes for both illumination and data transmission, reducing infrastructure complexity while ensuring high-quality video transmission
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 safe and efficient resource extraction in mines without human presence by providing real-time video monitoring and control, overcoming electromagnetic interference and alignment issues, ensuring accurate coordination of mobile nodes through diffused and non-line-of-sight communication configurations.
Implementation Method 1
Considering the characteristics of most coal mines (e.g., the ubiquity of solid-state lighting infrastructure, no interference of natural light, and the particularity of electromagnetic environment), light emitting diodes (LED) or laser diodes (LD)-based optical wireless communication (OWC) combined with Ethernet is expected to play a vital role in complex mine environments
Implementation Method 2
An autonomous mining system utilizing a combination of Ethernet and optical wireless communication (OWC) protocols, including ultraviolet light-based non-line-of-sight communication
Data Source
AI summary
An autonomous mining system includes a real-time digital video transmission sub-system configured to obtain video streams from underground, and transfer the video streams to a control center located above ground; and an exploration and maintenance sub-system located underground, and configured to extract a resource and bring the resource to the surface, based exclusively on commands received from the control center through the real-time digital video transmission sub-system.