1
Drew A Karnick, Timothy J Hanson: Gyroscope north seeker system and method. Honeywell International, Fogg & Power, Gregory M Taylor, August 19, 2008: US07412775 (18 worldwide citation)

A sensor system and method for determining a relative direction to true north is provided. The system comprises at least one angular rate sensor, such as a MEMS sensor, which has an input axis and a rotation axis. The sensor comprises a motor drive structure, a motor signal output from the motor dri ...


2
Drew A Karnick, William S Watson: Liquid level and angle detector. Watson, Moore & Hansen, September 8, 1998: US05802728 (13 worldwide citation)

A feedback circuit for generating an output signal from a sensor that makes changing electrical and temperature characteristics of the sensor and any sensing medium irrelevant. The sensor is placed in the forward loop of the circuit to make the output depend on the area of the parallel plates the se ...


3
William S Watson, Drew A Karnick: Vertical reference and attitude system. Moore & Hansen, August 15, 1995: US05440817 (12 worldwide citation)

The present invention provides a vertical reference that includes sensors providing signals indicative of angular tilt from the predetermined reference axis and the rate of angular tilt; an integrator to integrate the angular rate signal to provide a dynamic angular tilt signal; a pendulum to provid ...


4
Timothy J Hanson, Drew A Karnick: Real-time compensation of inertial sensor bias errors under high spin rate conditions. Honeywell International, Fogg & Powers, January 10, 2012: US08095250 (3 worldwide citation)

A method of estimating bias errors for an air vehicle in flight under high spin conditions is provided. The method comprises collecting a first set of data samples at a first time and collecting a second set of data samples at a second time. The first time and the second time occur after deployment ...


5
William Francis Kraetz, Drew A Karnick: Estimation of an initial condition inertial reference frame. Honeywell International, Fogg & Powers, March 4, 2014: US08666694 (1 worldwide citation)

An inertial device for determining an initial condition reference frame for a body is provided. The inertial device includes at least one inertial measurement unit, one or more processing devices, and one or more memory devices. The inertial measurement unit provides rotation information along at le ...


6
Timothy J Hanson, Mark W Weber, Max C Glenn, Drew A Karnick: MEMS device mechanism enhancement for robust operation through severe shock and acceleration. Honeywell International, Fogg & Powers, October 25, 2016: US09476712

A micro-electro-mechanical systems (MEMS) device comprises at least one proof mass configured to have a first voltage and a motor motion in a first horizontal direction. At least one sense plate is separated from the proof mass by a sense gap, with the sense plate having an inner surface facing the ...


7
Drew A Karnick, Peter H LaFond: Mems performance improvement using high gravity force conditioning. Honeywell International, Honeywell International, April 26, 2007: US20070090475-A1

A system for conditioning a sensor die. The sensor die may have a sensor wafer and a substrate wafer anodically bonded together. The sensor die may have an inertial device such as an accelerometer or a gyroscope. The device has a scale factor that may change with a bowing of the sensor die. The die ...


8
Todd L Braman, Drew A Karnick, Max C Glenn, Harlan L Curtis: Mems sensor package. Honeywell International, Honeywell International, March 15, 2007: US20070056370-A1

Methods and systems for controlling the internal dampening of MEMS sensors is provided. In one illustrative embodiment, a MEMS sensor is provide that can be tunable to a desired Q value, and the Q value may be held relatively constant over the expected life of the sensor. The MEMS sensor package may ...


9
Timothy J Hanson, Drew A Karnick: Real-time compensation of inertial sensor bias errors under high spin rate conditions. Honeywell International, Honeywell Fogg, November 25, 2010: US20100299003-A1

A method of estimating bias errors for an air vehicle in flight under high spin conditions is provided. The method comprises collecting a first set of data samples at a first time and collecting a second set of data samples at a second time. The first time and the second time occur after deployment ...


10
Todd L Braman, Drew A Karnick, Max C Glenn, Harlan L Curtis: Mems sensor package. Honeywell Internationa, Honeywell Fogg, June 10, 2010: US20100139373-A1

Methods and apparatus for a MEMS sensor package are provided. In one embodiment, a MEMS sensor package comprises a MEMS sensor; a sensor body permeable to gas leakage at a first leak rate; a backfill gas that pressurizes the sensor body to a backfill pressure; wherein the backfill pressure provides ...