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 Telemetry Solutions
Sperosens implemented environmental telemetry systems in the mining industry since 1997.
The SL2010 Telemetry Solution is a wide area distributed network aimed at monitoring and controlling a vast amount of remote devices in harsh environments. Sperosens developed this solution to assist mines in improving underground data communication, and is mostly utilised as an underground environmental monitoring and fire detection system. The field network is based on LonWorks(R) technology, and is implemented as a free topology, custom configurable and expandable solution based on specific mining requirements. The SL2010 software suite is built on .NET, SQL and ASP technology and allows the system to capture, store and display data, even by remote web access.
Sperosens now offers SL2010 Software as a Service (SAAS), whereby the acquisition, installation and maintenance is available as a total package within a Service Level Agreement (SLA).
SL2010 Telemetry System Applications
• Fire Detection applications employing CO Gas and Smoke sensors. A special fire alarm algorithm (FAA) reduces nuisance alarms during blasting times, while still maintaining the integrity of real fire warning.
• Environmental monitoring and control utilising various sensors types including CH4, O2, H2S, air flow, air temperature, humidity and differential pressure sensors.
• Ventilation door open/close status can be monitored and ventilation fans can be remotely stopped and started from the server PC.
• Engineering monitoring including dam level sensors and pump start and stop controls.
• Electrical substations monitored for currents, voltages and KWH. High voltage protection relays monitoring.
• Conveyor belt monitoring and control with weightometers, coal/ore sensors belt status, sequential start and stop.
• Man and asset tracking (e.g. loco’s and hoppers).
SL2010 Telemetry System Features
• SL2010 telemetry systems are wide area distributed monitoring and control networks based on LonWorks® digital communications technology. (www.echelon.com).
• A SL2010 telemetry system mainly comprises of two distinct types of sub-networks:
- Backbone networks that distribute signals from the server PCs to remote centres such as level stations in the shaft or remote ventilation shafts/fans (Fibre, Ethernet, RS485, FT10).
- Field networks on 4 core copper cable connecting to field devices where actual measurement and control takes place.
• Field networks are 4 core standard power cables distributing digital signals and 24 Volt DC power to field devices.
• Various types of routers are employed to convert between network mediums.
• Field networks can be constructed freely according to tunnel layout without topology restrictions (such as multi-drop).
• Field networks can be up to 20 km of cable per level without loss of LonWorks communications integrity.
• DC power supply range on the cable depends on the number of devices connected.
• Booster DC power supplies can be installed along cables of longer lengths to maintain voltage levels
• Field devices on a field network can be an unrestricted mixture of IOC’s (Input and Output Controllers).
• Typical IOC’s can accommodate up to 4 separate channels:
- Analogue 4-20 mA or 0-1 mA
- Digital inputs
- Digital outputs
• All standard 4-20mA industry sensors can be connected to an IOC.
• IOC’s combined with 0-1 mA inputs allow connection to Anglo American Fire Detection sensor heads.
• Field networks can accommodate up to 256 IOC’s
• Up to 256 levels can be equipped with field networks.
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