Maryland's Defense Patent Database

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Acoustic communication and locating devices for underground mines

Patent image
NRL

A system and method are described for locating and communicating with miners in an underground mine, in which miners carry a battery-powered signal unit with an impact actuator engagable with a wall, floor, or ceiling surface of the mine to transmit acoustic signals through the ground, and actuate controls on the unit to send a predefined message or a specific message via the impact actuator to ground-coupled acoustic receivers coupled with a base station that includes a decoder to determine the message sent by the miner and a location component to determine the miner's location based on the received signals.

Inventors: 
Yang, Tsih C.; Turgut, Altan
Patent Number: 
Technical domain: 
Sensors and Measurement
FIle Date: 
2009-06-19
Grant Date: 
2013-02-12
Grant time: 
1,334 days
Grant time percentile rank: 
24
Claim count percentile rank: 
5
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY