Detached rock evaluation device

Details Detached rock evaluation device Detached rock evaluation device

1985-01-22

1986-07-08

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73594, G01H 114

Patent

active

045985880

ABSTRACT:
A rock detachment evaluation device (10) having an energy transducer unit 1) for sensing vibrations imparted to a subject rock (172) for converting the sensed vibrations into electrical signals, a low band pass filter unit (12) for receiving the electrical signal and transmitting only a low frequency segment thereof, a high band pass filter unit (13) for receiving the electrical signals and for transmitting only a high frequency segment thereof, a comparison unit (14) for receiving the low frequency and high frequency signals and for determining the difference in power between the signals, and a display unit (16) for displaying indicia of the difference, which provides a quantitative measure of rock detachment.

REFERENCES:
patent: 3361225 (1968-01-01), Nichols
patent: 3531983 (1970-10-01), Heath et al.
patent: 4150576 (1979-04-01), Tarpley, Jr.

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