David Richard Carlson

US Patent:

6713997, Mar 30, 2004

Filed:

Feb 9, 2001

Appl. No.:

09/780799

Inventors:

David C. Carlson - Rockvale TN
M. Jason Thurmond - Murfreesboro TN
Jeffrey J. Farago - Franklin TN
Kenneth L. McMahon - Franklin TN
Thomas J. Seifert - Mt. Juliet TN
Robert C. Ditmore - Murfreeboro TN
Avery D. Long - Lavergne TN

Assignee:

Square D Company - Palatine IL

International Classification:

G01R 1100

US Classification:

324 74, 324142, 702 60

Abstract:

A metering module for use in a power circuit monitoring system including a circuit monitor having a processor for processing data related to power signals, said metering module comprising at least one sensor for sensing a predetermined property of a power signal and for producing a corresponding sensor signal, and a modular metering circuit for producing data corresponding to said sensor signal for input into said circuit monitor, wherein said metering module is selectively detachable and replaceable relative to said circuit monitor to permit one or more of testing, calibration and repair of said metering module thereby minimizing any interruption in operation of said circuit monitor.

US Patent:

6714881, Mar 30, 2004

Filed:

Aug 14, 2001

Appl. No.:

09/929325

Inventors:

David C. Carlson - Rockvale TN
Michael J. Devaney - Hallsville MO

Assignee:

Square D Company - Palatine IL

International Classification:

G06F 1900

US Classification:

702 61, 702125, 702187, 702189, 307 3, 307413, 307125, 708405, 708200, 700 14, 700 22, 324 98, 324110

Abstract:

A method for time reference compensation in a power metering system, the method comprising monitoring a time-dependent characteristic of incoming AC power over a predetermined local time interval, comparing the monitored characteristic over the predetermined local time interval with the expected value of the characteristic based upon the nominal frequency of the AC power, and calculating a correction to one or more of local real-time and time-based measurements of the power metering system, based on the comparing.

US Patent:

RE40889, Sep 1, 2009

Filed:

Mar 29, 2006

Appl. No.:

11/392924

Inventors:

David C. Carlson - Rockvale TN, US
Jason M. Thurmond - Murfreesboro TN, US
Jeffrey J. Farago - Franklin TN, US
Kenneth L. McMahon - Newbury Park CA, US
Thomas J. Seifert - Mt. Juliet TN, US
Robert C. Ditmore - Wichita Falls TX, US
Avery D. Long - Madison AL, US

International Classification:

G01R 21/133
G01R 21/00

US Classification:

324 74, 324142

Abstract:

A metering module for use in a power circuit monitoring system including a circuit monitor having a processor for processing data related to power signals, said metering module comprising at least one sensor for sensing a predetermined property of a power signal and for producing a corresponding sensor signal, and a modular metering circuit for producing data corresponding to said sensor signal for input into said circuit monitor, wherein said metering module is selectively detachable and replaceable relative to said circuit monitor to permit one or more of testing, calibration and repair of said metering module thereby minimizing any interruption in operation of said circuit monitor.

US Patent:

7616523, Nov 10, 2009

Filed:

Nov 13, 2008

Appl. No.:

12/291710

Inventors:

Hocine Tabti - Osteras, NO
David Helmer Carlson - Houston TX, US

Assignee:

PGS Geophysical AS - Lysaker

International Classification:

G01V 1/38

US Classification:

367 24, 367 21

Abstract:

A method for using signals measured by pressure responsive seismic sensors and motion responsive seismic sensors disposed in a seismic cable includes simulating a selected range frequency response of the motion responsive sensor signals for each of a plurality of selected depths in a body of water. For each sensor position along the streamer, the one of the simulated selected frequency range responses is selected for which the selected depth most closely matches an actual sensor depth. The selected simulated selected range frequency responses are combined with the measured motion responsive sensor signals to produce full bandwidth motion responsive signals. The full bandwidth signals are combined with the pressure responsive signals to determine at least one of an upgoing and downgoing pressure or motion wavefield.

US Patent:

57372314, Apr 7, 1998

Filed:

May 28, 1996

Appl. No.:

8/653831

Inventors:

Michael W. Pyle - Hermitage TN
David C. Carlson - Murfreesboro TN

Assignee:

Square D Company - Palatine IL

International Classification:

G01R 2106

US Classification:

364483

Abstract:

An improved metering unit is described which samples a power-related waveform and simultaneously captures its analog signal parameters for temperature and all phases of voltage and current, providing a more accurate and clearer waveform sample that effectively detects harmonics problems and does not require signal interpolation methods. The improved metering unit comprises signal conditioning circuitry interfacing with the power line for sensing temperature and all desired phases of voltage and current parameters of the waveform. The metering unit further comprises a processor having a timer output. The timer output controls track and hold circuitry and an A/D converter. The timer output places the track and hold circuitry in the hold mode to simultaneously capture temperature and all the desired phases of voltage and current of the waveform, and, at the same time, the timer output triggers the A/D converter to convert the captured analog signal parameters into digital sample values.

Address:

12206 Chartwell Dr, Houston, TX 77031

Phone:

2819337183

VIN:

1FTRX12W39KB25294

Make:

FORD

Model:

F-150

Year:

2009