Underground communication is keeping pace with surface communication

In this thesis, a novel diagnostic system has been developed to increase the realibility of leaky feeder communication systems in underground mines. The new system is based on three main parts: 1) Diagnostic Receiver Unit (DRU) located in the control room above ground; 2) several Diagnostic Transponder Units (DTU) connected to amplifiers, Power Supply Units (PSU), fans and sensors; and 3) Communication protocol that was designed for this specific system. The amplifiers, PSU, fans, and sensors in the system cascade will be able to communicate freely with the control room through the leaky cable to send information about their current conditions, and receive configuration messages. A new concept is also presented that provides energy saving in mines; Ventilation-on-Demand where the fans will operate according to the current situation of each section in the mine. This is made possible through a series of interrupt messages that is sent from the DTU attached to the fan/sensor to the DRU in the control room.

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Coadaptationary Aspects of the Underground Communication Between Plants and Other Organisms

Biocommunication of Plants - Signaling and Communication in Plants ◽

10.1007/978-3-642-23524-5_19 ◽

2011 ◽

pp. 361-375 ◽

Cited By ~ 1

Author(s):

Akifumi Sugiyama ◽

Daniel K. Manter ◽

Jorge M. Vivanco

Keyword(s):

Underground Communication

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On-Site and External Energy Harvesting in Underground Wireless

Electronics ◽

10.3390/electronics9040681 ◽

2020 ◽

Vol 9 (4) ◽

pp. 681 ◽

Cited By ~ 3

Author(s):

Usman Raza ◽

Abdul Salam

Keyword(s):

Energy Harvesting ◽

Wireless Power Transfer ◽

Energy Sources ◽

Power Transfer ◽

Wireless Power ◽

External Energy ◽

Term Operation ◽

Available Energy ◽

Underground Communication

Energy efficiency is vital for uninterrupted long-term operation of wireless underground communication nodes in the field of decision agriculture. In this paper, energy harvesting and wireless power transfer techniques are discussed with applications in underground wireless communications (UWC). Various external wireless power transfer techniques are explored. Moreover, key energy harvesting technologies are presented that utilize available energy sources in the field such as vibration, solar, and wind. In this regard, the Electromagnetic (EM)- and Magnetic Induction (MI)-based approaches are explained. Furthermore, the vibration-based energy harvesting models are reviewed as well. These energy harvesting approaches lead to design of an efficient wireless underground communication system to power underground nodes for prolonged field operation in decision agriculture.

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