Industrial Wireless


Smartcom VHF leaker feeder system for underground communications

Technews Industry Guide - Wireless 2015 Industrial Wireless

Becker Mining has introduced its latest Smartcom VHF leaky feeder system, which ensures reliable underground communications. This system has advanced features for flexibility and low maintenance requirements.

“The system equips mining operations with multiple simultaneous voice and data radio channels, with low intermodulation noise levels, to ensure clear and reliable communications underground,” says Andrew Trentelman, senior general manager: electronics, Becker Mining South Africa. “This leaky feeder system, with a modular design, features the option of local and remote diagnostic amplifiers with manual and automatic gain control, to ensure every installation and subsequent maintenance procedures are safe and effortless.

“Mines are usually remote to major cities and established infrastructure, which makes access to communication specialists and services difficult for the sector. The Smartcom VHF leaky feeder system, which has been installed in mines throughout the world, is known for dependable performance, requiring little maintenance.”

The system is designed with local diagnostics via three on board LED indicators as standard. This facilitates fault finding and troubleshooting through quick identification of faulty components, and communicates relevant information on the display unit, thus reducing downtime and repair costs. The amplifier is suitable for installations that cannot afford the added expense of Ethernet, and where remote diagnostics are unnecessary.

Becker’s latest Smartcom VHF leaky feeder system, with local and remote diagnostics, also has Ethernet capabilities. This unit has the functionality to send information to an amplifier installed on the surface, enabling a control room operator to retrieve relevant information. This is particularly useful in the event of a system fault, as the operator can easily identify precisely where the problem is. The system also provides relevant information on what equipment is needed to repair the fault.

Robust Smartcom VHF leaky feeder systems can be upgraded at any time, within budget restraints, to suit the changing needs of every mine. With the simple installation of an upgrade kit, advancement of the system is completed on site. This kit allows remote monitoring of the line amplifier and access to data that includes DC line voltage, downstream RF power, the automatic gain control / manual gain control modes and attenuator settings. These metrics are represented on the remote diagnostics server user interface installed on the surface. If Ethernet communications are required, the remote diagnostic amplifier and head end module should be used.

The flexibility of this system supports both analogue and digital radio repeaters, which means users have a choice of radio infrastructure.

Smartcom also supports telemetry and can be used for effectively controlling underground equipment like ventilation fans, pumps and stench gas fires. Important information is communicated efficiently back to mine control systems for optimum productivity and enhance safety.

Narrow band radio modems can also be used to provide a 9600 bps fixed/mobile data connection over the entire coverage area of the leaky feeder network and is especially useful with the Becker tagging and tracking system, to tag and track resource movement within the mine. Becker also manufactures a complete range of power supplies, designed especially for the harsh conditions of underground mines.

The Becker Smartcom amplifiers are bi-directional and amplify signals in both the ‘up’ and ‘down’ link directions, with helical filters to separate the upstream and downstream link frequencies. An important advantage is the high power amplifier option for coverage in remote work areas where it is impossible to access infrastructure.

Applications for Becker leaky feeder systems include mine-wide voice communication networks, medium speed mobile data, local and portable video monitoring, as well as distributed control and monitoring networks. This system is also designed for wide area antenna coverage.

For more information contact Andrew Trentelman, Becker Mining South Africa, +27 (0)11 617 6300, info@za.becker-mining.com, www.za.becker-mining.com



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