Christopher E Larsen

US Patent:

20120242426, Sep 27, 2012

Filed:

Mar 24, 2011

Appl. No.:

13/071159

Inventors:

Christopher George Larsen - Cincinnati OH, US
Stuart James Shelley - Cincinnati OH, US
Aaron Collins Hacker - Cincinnati OH, US
Adam Jacob Hehr - Port Clinton OH, US

Assignee:

ETEGENT TECHNOLOGIES LTD. - Cincinnati OH

International Classification:

H01P 3/00
H01P 11/00

US Classification:

333239, 29600, 29593

Abstract:

A broadband waveguide incorporates various reflection suppression techniques to reduce reflections in signals communicated thereby. The waveguide includes one or more filaments that each include a first and second end. A first matrix may be configured proximate the first end(s) while a second matrix may be configured proximate an intermediate location between the first and second ends. A damping material may cover a portion of the filament(s) that extends from the second matrix to the second end(s) (including the second end(s) themselves) and/or the second end(s) of the filament(s) is/are shaped to at least partially suppress reflections of the signal therefrom. When configured with multiple filaments, at least two of the filaments may have differing lengths that extend from the second matrix and also operate to at least partially suppress reflections of a signal.

US Patent:

20120325018, Dec 27, 2012

Filed:

Jun 22, 2011

Appl. No.:

13/166594

Inventors:

Christopher George Larsen - Cincinnati OH, US
Stuart James Shelley - Cincinnati OH, US
Logan Alexander Niehaus - Cincinnati OH, US

Assignee:

ETEGENT TECHNOLOGIES LTD. - Cincinnati OH

International Classification:

G01L 5/04

US Classification:

7386241

Abstract:

Systems and methods for measuring environmental conditions of a sensing location, where a sensor including a measuring surface and a wire coupled in tension to the measuring surface over which ultrasonic signals may be transmitted and sensed. Signal analysis of ultrasonic signals transmitted over the tensioned wire are analyzed to measure one or more environmental conditions acting on the measuring surface.

US Patent:

20210372971, Dec 2, 2021

Filed:

Nov 30, 2020

Appl. No.:

17/107646

Inventors:

- Cincinnati OH, US
Richard A. Roth - Goshen OH, US
Christopher G. Larsen - Cincinnati OH, US
Stuart J. Shelley - Cincinnati OH, US

International Classification:

G01N 29/32
G01L 11/06
G01N 29/24
G01H 11/00
G01L 1/10
G01N 29/07
G01N 29/12
F01D 17/08

Abstract:

An environmental condition may be measured with a sensor () including a wire () having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone () may be used to couple ultrasonic energy between a waveguide wire () and a transducer ().

US Patent:

20180266864, Sep 20, 2018

Filed:

Jul 27, 2015

Appl. No.:

15/745040

Inventors:

- Boulder CO, US
Christopher George Larsen - Cincinnati OH, US
Timothy J. Cunningham - Boulder CO, US
Stuart J. Shelley - Cincinnati OH, US

Assignee:

Micro Motion, Inc. - Boulder CO

International Classification:

G01F 1/84
G01F 25/00

Abstract:

A method and apparatus for a flowmeter () is provided. The method comprises the steps of placing a material in a flow tube (′) while exciting a vibration mode of the flow tube (′). Exciting the vibration mode of the flow tube (′) comprises the steps of periodically driving a first driver (L) with a first signal and periodically driving a second driver (R) with a second signal, wherein the second driver (R) is driven essentially in phase with the first driver (L), but wherein the first driver's (L) drive amplitude modulated signal reaches a maximum amplitude when the second driver's (R) drive modulated signal reaches a minimal amplitude, and the first driver's (L) drive amplitude modulated signal reaches a minimum amplitude when the second driver's (R) drive amplitude modulated signal reaches a maximum amplitude. The method also comprises the steps of measuring the relative phase between a first pickoff (L) and a second pickoff (R) and determining a relative phase of a right eigenvector for the flow tube (′).

US Patent:

20170030871, Feb 2, 2017

Filed:

Apr 9, 2015

Appl. No.:

15/302836

Inventors:

- Cincinnati OH, US
Richard A. Roth - Goshen OH, US
Christopher G. Larsen - Cincinnati OH, US
Stuart J. Shelley - Cincinnati OH, US

International Classification:

G01N 29/32
F01D 17/08
G01N 29/24

Abstract:

An environmental condition may be measured with a sensor () including a wire () having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone () may be used to couple ultrasonic energy between a waveguide wire () and a transducer ().

US Patent:

20140238140, Aug 28, 2014

Filed:

Oct 26, 2011

Appl. No.:

14/349148

Inventors:

Christopher George Larsen - Cincinnati OH, US
Matthew Joseph Rensing - Cincinnati OH, US
Amy Mai Nilsen - Boulder CO, US
Roger Scott Loving - Boulder CO, US

Assignee:

Micro Motion, Inc. - Boulder CO

International Classification:

G01F 1/84
G01H 3/00

US Classification:

73649, 29593

Abstract:

A combined driver and pick-off sensor component () for a vibrating meter is provided. The combined driver and pick-off sensor component () includes a magnet portion (B) with at least a first magnet (). The combined driver and pick-off sensor component () further includes a coil portion (A, A) receiving at least a portion of the first magnet (). The coil portion (A, A) includes a coil bobbin (), a driver wire () wound around the coil bobbin (), and a pick-off wire () wound around the coil bobbin ().