Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-03-15
2000-07-18
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
3408555, 3408564, 340685, 324326, 324 67, 361 91, G08B 2100
Patent
active
060913371
ABSTRACT:
A sensor system for use on drilling equipment to detect the presence of high voltages during horizontal or vertical drilling and providing an alarm signal corresponding to one of three possibilities: (1) the drilling tool hitting a high voltage line; (2) the drilling tool remaining in contact after hitting the high voltage line; and (3) an exposed or damaged high voltage line in close proximity to the drilling implement. The sensor system detects alternating current, converts the alternating current signal to a pseudo square waveform signal, compares the magnitude of the square waveform signal with a reference voltage, and sounds an alarm if the magnitude of the square waveform signal exceeds the reference voltage. The sensor system also incorporates a self-test circuit which allows an operator to check its functionality before use. The operator can also check the sensor at any time during drilling process.
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Arshad Mohammad Javaid
Berger Alan D.
Case Corporation
Hofsass Jeffery A.
Nguyen Tai T.
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