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8 Research on TTE Research on TTE has been conducted by different universities and government agencies around the world and resulted in a few commercially available products. 5 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 OF 996 RO 995 DP 994 (i) CSIR Miningtek, South Africa: Miningtek developed a trapped-miner-locating device. A prototype was successfully tested underground where the device provided detection and location of a trapped miner at a distance of more than 30 m through rock.

Connections to other underground communication systems are planned. The US Army originally commissioned the project for wartime use in such places as Afghanistan or to communicate with soldiers who may be in a collapsed building. But in response to the 14 miners who died in West Virginia coal mines in the recent past, government officials recently directed Kutta to adapt the device for commercial use in the mining industry. The patent-pending SWECS consists of a PDA-type device with a screen and keypad, an 8-ounce radio, and a foot-long antenna.

The readers provide a communication pathway with high redundancy to report the location and status of personnel. An evacuation signal can be communicated to underground staff by flashing the cap lamps. Finally, LAMPS can be used to relay sensor data for gas- and air-quality monitoring from appropriate sensors deployed in hazard areas. This information can be accessed from any point in a mine. In addition, the technology can permit the display of the location of personnel and equipment on images of mine maps and layouts.

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Accuracy of wood resistance sensors for measurement of humidity


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