Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1978-07-05
1981-03-24
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
G01V 317
Patent
active
042583217
ABSTRACT:
A method and apparatus for radio geophysical surveying includes measuring the relative magnitude and phase of radio frequency signal components reflected from subterranean formations. The apparatus comprises a transmitter selectively connected to a vertical antenna and a loop antenna, and a pair of receivers, one receiver being connected to a vertical antenna and the other connected to a loop antenna. A surface propagated calibration signal is transmitted and is received by each of the receivers. The outputs of the receivers are connected to the input of a difference amplifier, a difference signal is generated, and the magnitude and phase of the difference signal are measured and recorded. A survey signal, including surface propagated components and earth propagated components, is then transmitted. The survey signal is received, a difference signal is generated, and the magnitude and phase thereof are measured. For each position along the survey path, the calibration magnitude and phase are vectorially subtracted from the corresponding survey magnitude and phase, and the resultant magnitude and phase are plotted. At each position, the data is taken for an electric field vector alignment of the transmitter and receiver loop antennas, and for a magnetic field vector alignment thereof. The transmitter and receivers include means for precisely maintaining consistency throughout the survey.
REFERENCES:
patent: 2426918 (1947-09-01), Barret
patent: 2573682 (1951-11-01), Barret
patent: 2874348 (1959-02-01), Brant et al.
patent: 2887650 (1959-05-01), Ruddock et al.
patent: 2931973 (1960-04-01), Puranen
patent: 2992325 (1961-07-01), Lehan
patent: 2994031 (1961-07-01), Slattery
patent: 3168694 (1965-02-01), Slattery
patent: 3594633 (1971-07-01), Barringer
patent: 3609522 (1971-09-01), Hutchins et al.
patent: 3617866 (1971-11-01), Dowsett et al.
patent: 3984758 (1976-10-01), Millon
patent: 4010413 (1977-03-01), Daniel
patent: 4100482 (1978-07-01), Yamashita et al.
LandOfFree
Radio geophysical surveying method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radio geophysical surveying method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio geophysical surveying method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2409892