Rudolf C Dankwort

US Patent:

59460970, Aug 31, 1999

Filed:

Dec 31, 1997

Appl. No.:

9/001967

Inventors:

Glen A. Sanders - Scottsdale AZ
Rudolf C. Dankwort - Phoenix AZ
Ralph A. Bergh - Phoenix AZ

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1972

US Classification:

356350

Abstract:

An apparatus for eliminating or reducing vibration-induced errors due to vibration rectification by applying a variable weighting function at the demodulator or analog-to-digital converter by changing the size of the demodulator reference signal or the converter gain, respectively. The changing is performed within the frequency spectrum of the vibration. Sampling of the detector output may be utilized and the samples are accumulated and processed to remove the variations due to vibration, and the rotation rate is recovered by digital demodulation.

US Patent:

50188593, May 28, 1991

Filed:

Jan 26, 1989

Appl. No.:

7/302484

Inventors:

Chin L. Chang - Phoenix AZ
Rudolf C. Dankwort - Phoenix AZ

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01B 902

US Classification:

356350

Abstract:

A phase difference controller for a rotation sensor based on a coiled optical fiber operating a dual output generator in a feedback loop to provide a pair of signals to operate a pair of frequency translating devices in the optical path with the coil. A pair of sawtooth-like signals of appropriate frequency and polarity operate the frequency translating device to provide a phase difference shift in the optical path.

US Patent:

51969041, Mar 23, 1993

Filed:

Dec 31, 1990

Appl. No.:

7/636305

Inventors:

Preston Dane - Phoenix AZ
Rudolf C. Dankwort - Phoenix AZ
Tamim F. El-Wailly - Peoria AZ

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1972

US Classification:

356350

Abstract:

A bias modulation amplitude monitoring system for a rotation sensor having a pair of output signal component detectors to provide magnitudes of the corresponding frequency components in that signal which are used by a component relationship determination arrangement capable of adjusting the output signal to have a selected value in a range of values for a selected rate of rotation thereof, and to correct variations therein.

US Patent:

44790708, Oct 23, 1984

Filed:

Jun 10, 1983

Appl. No.:

6/503004

Inventors:

Richard H. Frische - Phoenix AZ
Rudolf C. Dankwort - Phoenix AZ
Charles D. Klem - Phoenix AZ

Assignee:

Sperry Corporation - New York NY

International Classification:

H01L 4108

US Classification:

310338

Abstract:

A quartz crystal vibrating diaphragm pressure sensor includes a primary quartz crystal body having a diaphragm formed therein and electrodes on each side of the diaphragm for piezoelectrically exciting thickness shear mode oscillations of said diaphragm, said oscillations varying in frequency in accordance with variations in fluid pressures applied to the surfaces of said diaphragm. A second identical or substantially identical diaphragm similarly excited but exposed to a constant pressure provides a reference frequency for providing precision difference frequency pressure measurement and for inherently compensating for ambient conditions affecting both diaphragms.

US Patent:

54105153, Apr 25, 1995

Filed:

Apr 29, 1993

Appl. No.:

8/055133

Inventors:

Michael S. Bielas - Phoenix AZ
Rudolf C. Dankwort - Phoenix AZ

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1964

US Classification:

356350

Abstract:

A light source with wavelength compensation for a fiber optic rotation sensor includes a light source to provide light for input to the fiber optic rotation sensor. A source control circuit generates a source control signal representative of the temperature of the light source. A driver generates a drive signal as a function of the source control signal to drive the light source. One of a plurality of scale factors for the fiber optic rotation sensor is generated also as a function of the source control signal over a predetermined temperature range. The source control circuit includes a temperature sensor which provides a current signal representative of the temperature of the light source and a buffer network for sinking the current signal and for generating a source control voltage as the source control signal. A method for wavelength compensation of a light source for a fiber optic rotation sensor includes sensing a temperature of the light source and generating a source control signal representative of the temperature. A drive signal is applied to the light source as a function of the source control signal and a scale factor for the fiber optic rotation sensor is generated as a function of the compensation signal.

US Patent:

50972642, Mar 17, 1992

Filed:

Jun 18, 1990

Appl. No.:

7/539767

Inventors:

Mats A. Brenner - Bloomington MN
Rudolf C. Dankwort - Phoenix AZ
Tamim F. El-Wailly - Peoria AZ

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H03M 152
H03M 118

US Classification:

341167

Abstract:

An integrating analog-to-digital converter system in which alternating and different combinations of signals are integrated, and which are selected for such integration both periodically and through an integrating result reaching a reference value in the periods. A digit count is provided as a system output indicating the time duration of integration of a selected signal combination in each period.

US Patent:

59234245, Jul 13, 1999

Filed:

Jun 19, 1997

Appl. No.:

8/879902

Inventors:

Glen A. Sanders - Scottsdale AZ
Rudolf C. Dankwort - Phoenix AZ
Andrew W. Kaliszek - Phoenix AZ
Clarence E. Laskoskie - Scottsdale AZ
Lee K. Strandjord - Tonka Bay MN
Daniel L. Sugarbaker - Ada MI
Jerry L. Page - Alto MI

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1972

US Classification:

356350

Abstract:

A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form which is used in a control system to null out optical intensity variations at the frequencies of vibration.

US Patent:

59262753, Jul 20, 1999

Filed:

Jun 19, 1997

Appl. No.:

8/879901

Inventors:

Glen A. Sanders - Scottsdale AZ
Rudolf C. Dankwort - Phoenix AZ
Andrew W. Kaliszek - Phoenix AZ
Clarence E. Laskoskie - Scottsdale AZ
Lee K. Strandjord - Tonka Bay MN
Daniel L. Sugarbaker - Ada MN
Jerry L. Page - Alto MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1972

US Classification:

356350

Abstract:

A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form which is used in a control system to null out optical intensity variations at the frequencies of vibration.