Method for remote control of a coal shearer

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine

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299 30, E21C 3524

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active

047534842

ABSTRACT:
A method for remotely controlling the mechanical functions of a coal cutting machine's electrohydraulic system which utilizes a medium frequency remote control communication system and a coal-rock interface sensor. The coal-rock interface sensor is a shielded resonant horizontal loop antenna.

REFERENCES:
patent: 3407002 (1968-10-01), Pidgeon
patent: 4634186 (1987-01-01), Pease
Zimmerman et al., "Automation of the Longwall Mining System", JPL Publication, 82-99, pp. IV to IX, 1-1 to 1-7 and 3-1 to 3-8, Nov. 1982.
Chang et al. "An Analysis of a Resonant Loop as an Electomagnetic Sensor of Coal Seam Thickness", Proceedings of URSI Conference on Remote Sensing, Apr./May 1977.
Dobroski et al., "Control and Monitoring via Medium-Frequency Techniques and Existing Mine Conductors", IEEE Transactions on Industry Applications, vol. 1A-21, pp. 1087-1092, Jul./Aug. 1985.

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