Seismic array

Details Seismic array Seismic array

1977-08-16

1979-07-03

Birmiel, Howard A.

Communications: electrical

Selective

Having electron beam device

340 155TS, 340182, G01V 120

Patent

active

041602331

ABSTRACT:
An improved seismic array is disclosed having a plurality of seismic detector connection points with a seismic detector at each seismic detector connection point. The output of each seismic detector in the array is weighted by providing first resistive weighting at each seismic detector connection point. The weighted output of all detectors in the array is provided to a first end of the array over a single pair of wires. An amplifier is additionally provided for connection to the pair of wires at the first end of the array, and the amplifier has feedback network, including a resistor. The ratio of the value of the resistance in the feedback network to the value of the weighting resistor at a seismic detector connection point determines the magnitude of the signal appearing at the output of the amplifier from the response from the seismic detector at that point. An array having bi-directional capabilities is achieved by providing second resistive weighting to the output of each seismic detector in the array and by providing a second pair of wires which interconnects this second weighted output of the detectors and which emerges from the second end of the array. A second amplifier is coupled to the pair of wires at the second end of the array, and this amplifier also has a feedback network including a resistor. The ratio of the value of the feedback resistor to the value of the second resistive weight at each seismic detector connection point determines the magnitude of the signal appearing at the output of the second amplifier from the response of the seismic detector at the seismic detector connection point. Chebychev weighting of the array response may be achieved by proper choice of the values of the feedback resistors and the weighting resistors at each seismic detector connection point.

REFERENCES:
patent: 2266040 (1941-12-01), Hoover, Jr.
patent: 2698927 (1955-01-01), Parr, Jr.
patent: 2747172 (1956-05-01), Bayhi
patent: 3286228 (1966-11-01), Anstey
patent: 3863200 (1975-01-01), Miller
patent: 3863201 (1975-01-01), Briggs et al.
patent: 3887897 (1975-06-01), Neitzel et al.

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