Ronny Scott Raborn

US Patent:

20190243015, Aug 8, 2019

Filed:

Apr 17, 2019

Appl. No.:

16/386514

Inventors:

- Houston TX, US
James Michael Hallaman - Sugar Land TX, US
Roy James - Cypress TX, US
Samuel Anil Choudhari - Houston TX, US
Danny Sheen - Houston TX, US
Barry S. Basile - Houston TX, US
Ronny Raborn - Houston TX, US

International Classification:

G01V 1/22
G01V 1/18

Abstract:

A seismic data acquisition unit includes circuitry to detect and digitize a seismic signal, and timing circuitry to control a time of acquisition of each sample of the seismic signal. The timing circuitry include a voltage controlled oscillator (VCO), a local clock incremented by the VCO, and a reference time receiver. The timing circuitry powers on the reference time receiver to generate a reference time value based on signals received from a reference time source, and measures time deviation of the local clock from the reference time value. The timing circuitry determines an adjustment value to apply to the VCO over a time interval during which the reference time receiver is not powered on. The adjustment value is selected to gradually bring the local clock into synchronization with the reference time source over the time interval at a time that the reference time receiver is to be next powered on.

US Patent:

20180239040, Aug 23, 2018

Filed:

Feb 21, 2017

Appl. No.:

15/438225

Inventors:

- Houston TX, US
James Michael Hallaman - Sugar Land TX, US
Roy James - Cypress TX, US
Samuel Anil Choudhari - Houston TX, US
Danny Sheen - Houston TX, US
Barry S. Basile - Houston TX, US
Ronny Raborn - Houston TX, US

Assignee:

GEOSPACE TECHNOLOGIES CORPORATION - Houston TX

International Classification:

G01V 1/22
G01V 1/00
G01V 1/18

Abstract:

A system for seismic data acquisition includes data recorders that lack external electrical connectors. A seismic data recorder includes a housing. Within the housing the seismic data recorder includes circuitry configured to detect and digitize seismic signals and communication circuitry. The communication circuitry includes a first transmitter plate adjacent a wall of the housing, and a first driver coupled to the first transmitter plate. The communication circuitry configured to communicate the digitized seismic signals to a data retrieval unit that is external to the data acquisition unit via a capacitor formed by the first transmitter plate, the wall of the housing, and a receiver plate external to the housing.