Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1981-09-29
1984-01-31
Purser, Ernest R.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
364183, 364420, E21C 3508, E21C 2724
Patent
active
044286180
ABSTRACT:
A signal processing system for an underground mining machine having a steerable mineral cutter and a sensor which senses natural radiation emitted from rock strata overlaying the radiation absorbing mineral and which derives a sensor signal representative of the cutting horizon of the cutter, comprises processing means for receiving and processing the sensor signal to derive an operational signal indicative of the cutter horizon of the cutter, calibration means for accepting a fed in calibration signal representative of a known existing condition of the cutting horizon and comparator means for comparing the derived operational signal with the calibration signal to determine an error in the derived operational signal and for instructing the processing means to apply a suitable correction to the derived operational signal.
REFERENCES:
patent: 4155594 (1979-05-01), Hartley et al.
patent: 4228508 (1980-10-01), Benthaus
patent: 4331262 (1982-05-01), Snyder
Coal Industry (Patents) Limited
Purser Ernest R.
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