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Message: Jan. 21/09 - MSHA approves Minecom's leaky feeder communications system
From the MSHA website: http://www.msha.gov/techsupp/PEDLoca...
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Leaky Feeder Communication Systems Manufacturer
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Model Number
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Approval #
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Mine Radio Systems
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Flexcom Communications Systems
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9B-219
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Varis Mine Tech.
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Model IS Leaky Feeder Communication System
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23-A050001
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DAC
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Type RFM 2000 Radio System
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9B-201
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EL-EQUIP, INC
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Model VHF-1 Radio System
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9B-196
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Tunnel Radio of America
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Model UltraComm Distributed Antenna Communication System
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23-A070005-0
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Becker Electronics (PTY) LTD
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Becker Leaky Feeder System
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23-A080003-0
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Minecom a division of TR Corporation Pty. Ltd.
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MCA 2000 UHF Leaky Feeder System
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23-A090001-0
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About Minecom (http://www.minecom.com/about/index.html)
Minecom was founded in Tasmania, Australia nearly 20 years ago to provide integrated communications and electronic equipment to the local mining industry. A winning combination of quality product and service saw the business grow to become a leading niche supplier to the international mining industry. The company today services major mining and tunnelling companies around the globe, from Australia to Poland and the USA.
In April 2006 leading Australasian technology group TR Corporation acquired Minecom, adding it to their portfolio of specialist brands offering a breadth of technology solutions for commerce and industry. The move saw the resources of Minecom expand to include significantly enhanced engineering capabilities and a strong management direction.
Our Expertise
The Minecom team comprises experienced technical sales staff and highly qualified communications engineers, working together to design solutions for each unique project.
Our mining expertise includes:
| Consultation | Sales engineers can assist with both general advice on communications options or solutions for specific requirements, working directly with mine management or with local specialist organisations. | |
| R&D | Always at the forefront of technology, if an existing product is not appropriate our team can engineer a new or optimized solution that meets your exact needs. | |
| System design | Using solutions such as Leaky Feeder technology as a backbone, Minecom will design a system delivering voice or data communications across a site, improving safety and control. By linking these solutions to video surveillance, personnel or vehicle tracking or a collision avoidance system, operations are further enhanced with additional efficiency and safety benefits. | |
| Installation | Our technical team will install and commission all equipment to the highest possible standards. With previous experience on both under and above ground operations, with Australia and internationally, our team work to rigorous quality and safety standards enforced by Quality Assurance procedures. | |
| Training & Documentation | Depending on your requirements comprehensive training and documentation can be provided, ranging from simple user training to more complex technical and maintenance training. |
About Minecom's Leaky Feeder Communications System (http://www.minecom.com/solutions/lea... )
Why Leaky Feeder
Communicating within an underground tunnel or enclosed environment is challenging, which is why Minecom is proud of its range of highly regarded Leaky Feeder systems.
Leaky Feeder systems overcome problems often encountered with traditional above ground style antennas, such as:
| • can be easily damaged • are susceptible to corrosion • are subject to phasing • can provide inconsistent coverage as trucks, loaders and other equipment can reflect, deflect or block the radio signals |
How does Leaky Feeder work?
Normal coaxial cable is designed to pass radio frequency (RF) signals from one end of the cable to the other with varying degrees of loss, dependant on the quality. The purpose of the cable’s outer copper shield is to keep as much signal as possible inside the cable and prevent external RF signals and/or interference from entering the cable.
However the external copper shield on a Leaky Feeder cable has ‘holes’ or ‘gaps’, allowing the RF signals to leak out evenly along its length, so they can be picked up by radios nearby. The holes in the Leaky Feeder cable also enable external RF signals to enter and run along the cable.
The basic function of a Leaky Feeder system is to maintain a constant level of signal along a considerable length of Leaky Feeder cable; a solution which is both effective and reliable.
Minecom's Leaky Feeder system
Minecom’s Leaky Feeder system has been engineered to exacting standards, utilising small inline, bi-directional amplifiers to boost the signals up and down the cable. Connection of the Leaky Feeder cable to amplifiers, branches, terminations and other peripherals is quick and easy, with no special tools required.
Minecom offers three levels of Leaky Feeder solutions:
- A Standard System
- A partially redundant Ring Feeder System
- The fully redundant Smart Reverse System
There are many options which can enhance operational capability, with the Head End rack able to be configured for any of the following:
| • Head End • Diagnostic Head End • Circuit Breaker Panel • Voice Radio Base Stations • Data Radio Modems • Transmitter Isolators • Master PLC • SMARTAmp Head End • SMARTVideo Video Demodulators • Radio to Telephone Interface • Audio Bridge • Power Supply • Battery Back Up |
Minecom systems can grow alongside a company's site or operations.
Other Head End rack equipment options offered include:
| • Voice storage & recording units • Video TV monitors • Multi-media equipment • Video & quad switchers • PC's for diagnostics/telemetry |
Minecom amplifiers can provide:
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• Automatic Gain Control (all models) |
A full range of passive units, including termination units, single branch units, dual branch units, power coupling units, inline antenna units, inline attenuators and joiner boxes are also available.
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