John Michael Poole

US Patent:

6865940, Mar 15, 2005

Filed:

Jun 25, 2003

Appl. No.:

10/604080

Inventors:

John McKinley Poole - Maynard MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01N019/00

US Classification:

7333505, 73 2901

Abstract:

A method of operating an aluminum oxide moisture sensor to measure moisture in a sample gas, where the sensor comprises a pair of electrodes sandwiched about a dielectric, the method comprising: a) heating the sensor to a first temperature above the sample gas temperature and holding the sensor at said first temperature for a first predetermined period of time; b) cooling down the sensor to a second lower temperature over a second predetermined period of time; c) taking plural samples of sensor conductance over a third predetermined period of time at the lower temperature; and d) determining a rate of adsorption of the moisture and using the rate of adsorption as a measure of moisture in the sample gas.

US Patent:

7943915, May 17, 2011

Filed:

Oct 10, 2008

Appl. No.:

12/249096

Inventors:

Xiaoyong Liu - Malden MA, US
Yufeng Huang - North Chelmsford MA, US
John McKinley Poole - Maynard MA, US
Gene Smith Berkowitz - Sudbury MA, US
Anthony Kowal - Berlin MA, US
Shawn D. Wehe - Niskayuna NY, US
Hejie Li - Schenectady NY, US

Assignee:

GE Infrastructure Sensing, Inc. - Billerica MA

International Classification:

G01V 8/00
G01J 3/28

US Classification:

2505591, 356326

Abstract:

Several methods of calibrating a wavelength-modulation spectroscopy apparatus configured to measure a concentration of an analyte in a sample gas are disclosed. Each of the methods allows for calibration and recalibration using a relatively safe gas regardless of whether the sample gas for which the concentration of the analyte can be determined is a hazardous gas. In one embodiment of the invention, calibration that is sample-gas specific is accomplished by determining a first slope coefficient and calibration function for the sample gas, after which a scaling factor can be determined based on the first slope coefficient and a second slope coefficient for the same or a different sample gas and used in a subsequent calibration (or recalibration) to scale the calibration function. In other embodiments of the invention, calibration that is not sample-gas specific is accomplished to allow for the determination of the analyte concentration in variable gas compositions and constant gas compositions.

US Patent:

7957001, Jun 7, 2011

Filed:

Oct 10, 2008

Appl. No.:

12/249156

Inventors:

Xiaoyong Liu - Malden MA, US
John McKinley Poole - Maynard MA, US
Yufeng Huang - North Chelmsford MA, US
Daniel M. Stearns - Canton MA, US
Michael J. Gambuzza - Pepperell MA, US
Gene Smith Berkowitz - Sudbury MA, US
Anthony Kowal - Berlin MA, US
Hejie Li - Schenectady NY, US
Shawn D. Wehe - Niskayuna NY, US

Assignee:

GE Infrastructure Sensing, Inc. - Billerica MA

International Classification:

G01N 21/31

US Classification:

356435, 250345

Abstract:

In one embodiment of the spectroscopy method, the method comprises the steps of modulating the wavelength of a monochromatic radiation at a modulation amplitude and a modulation frequency; determining a first variable representative of an absorbance of an analyte in a sample; and demodulating by phase-sensitive detection the first variable at a harmonic of the modulation frequency to produce a harmonic spectrum of the analyte. In one embodiment of the spectroscopy apparatus, the apparatus comprises a laser diode integrated with a first photodetector configured to detect an intensity of a backward emission from the laser diode and act as a reference detector; a second photodetector configured to detect an intensity of laser radiation exiting a sample; and electronic circuitry coupled to the laser diode and the photodetectors, configured to acquire and process spectra of the sample. In another embodiment, the spectroscopy apparatus comprises a beam splitter configured to split the laser radiation into a first radiation portion and a second radiation portion and a first photodetector configured to detect the intensity of the first radiation portion.

US Patent:

8026499, Sep 27, 2011

Filed:

Apr 11, 2011

Appl. No.:

13/083704

Inventors:

Xiaoyong Liu - Malden MA, US
Yufeng Huang - North Chelmsford MA, US
John McKinley Poole - Maynard MA, US
Gene Smith Berkowitz - Sudbury MA, US
Anthony Kowal - Berlin MA, US
Shawn D. Wehe - Niskayuna NY, US
Hejie Li - Schenectady NY, US

Assignee:

GE Infrastructure Sensing, Inc. - Billerica MA

International Classification:

G01V 8/00
G01J 3/28

US Classification:

2505591, 356326

Abstract:

Several methods of calibrating a wavelength-modulation spectroscopy apparatus configured to measure a concentration of an analyte in a sample gas are disclosed. Each of the methods allows for calibration and recalibration using a relatively safe gas regardless of whether the sample gas for which the concentration of the analyte can be determined is a hazardous gas. In one embodiment of the invention, calibration that is sample-gas specific is accomplished by determining a first slope coefficient and calibration function for the sample gas, after which a scaling factor can be determined based on the first slope coefficient and a second slope coefficient for the same or a different sample gas and used in a subsequent calibration (or recalibration) to scale the calibration function. In other embodiments of the invention, calibration that is not sample-gas specific is accomplished to allow for the determination of the analyte concentration in variable gas compositions and constant gas compositions.

US Patent:

8217376, Jul 10, 2012

Filed:

Apr 11, 2011

Appl. No.:

13/083697

Inventors:

Xiaoyong Liu - Malden MA, US
Yufeng Huang - North Chelmsford MA, US
John McKinley Poole - Maynard MA, US
Gene Smith Berkowitz - Sudbury MA, US
Anthony Kowal - Berlin MA, US
Shawn D. Wehe - Niskayuna NY, US
Hejie Li - Schenectady NY, US

Assignee:

GE Infrastructure Sensing, Inc. - Billerica MA

International Classification:

G01V 8/00
G01J 3/28

US Classification:

2505591, 356326

Abstract:

Several methods of calibrating a wavelength-modulation spectroscopy apparatus configured to measure a concentration of an analyte in a sample gas are disclosed. Each of the methods allows for calibration and recalibration using a relatively safe gas regardless of whether the sample gas for which the concentration of the analyte can be determined is a hazardous gas. In one embodiment of the invention, calibration that is sample-gas specific is accomplished by determining a first slope coefficient and calibration function for the sample gas, after which a scaling factor can be determined based on the first slope coefficient and a second slope coefficient for the same or a different sample gas and used in a subsequent calibration (or recalibration) to scale the calibration function. In other embodiments of the invention, calibration that is not sample-gas specific is accomplished to allow for the determination of the analyte concentration in variable gas compositions and constant gas compositions.

US Patent:

8547554, Oct 1, 2013

Filed:

Aug 17, 2011

Appl. No.:

13/211821

Inventors:

Xiaoyong Frank Liu - Wellesley MA, US
Yufeng Huang - Peabody MA, US
John McKinley Poole - Maynard MA, US
Gary S. Parece - Belmont MA, US
Anthony Kowal - Berlin MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01N 21/59

US Classification:

356437, 356432, 356246

Abstract:

A system includes a moisture analyzer configured to detect moisture in natural gas. The moisture analyzer includes an absorption cell that encloses and conducts the natural gas. The moisture analyzer also includes a pressure control device that may reduce a pressure of the natural gas inside the absorption cell. The moisture analyzer includes a light emitting device that may transmit light through the natural gas inside the absorption cell, as well as a photodetector that may detect an intensity of the light transmitted through the natural gas and exiting the absorption cell.

US Patent:

20200003684, Jan 2, 2020

Filed:

Jun 17, 2019

Appl. No.:

16/442732

Inventors:

- Billerica MA, US
John Poole - Billerica MA, US
Aniruddha Sudheer Weling - Billerica MA, US
Gene Berkowitz - Billerica MA, US

Assignee:

GE Infrastructure Sensing, LLC - Billerica MA

International Classification:

G01N 21/39
G01N 33/22
G01N 1/34
G01N 21/01
G01N 33/00

Abstract:

Methods, devices, and systems are provided for analyzing the moisture content in natural gas. In one embodiment, a portable moisture analyzer system is provided and can include a moisture analyzer and a housing. The moisture analyzer can include a tunable diode laser absorption spectrometer (TDLAS) and a natural gas sample conditioning system. The TDLAS can be configured to detect water vapor content within a natural gas sample. The sample conditioning system can be in fluid communication with the TDLAS and can be configured to condition at least one of temperature, flow rate, and pressure of a natural gas sample. The housing can be configured to receive the moisture analyzer therein and to protect the moisture analyzer from vibration and/or shock.

US Patent:

20180238797, Aug 23, 2018

Filed:

Dec 26, 2017

Appl. No.:

15/854495

Inventors:

- Bellerica MA, US
John Poole - Billerica MA, US
Aniruddha Sudheer Weling - Billerica MA, US
Gene Berkowitz - Billerica MA, US

International Classification:

G01N 21/39
G01N 33/00
G01N 21/01
G01N 1/34

Abstract:

Methods, devices, and systems are provided for analyzing the moisture content in natural gas. In one embodiment, a portable moisture analyzer system is provided and can include a moisture analyzer and a housing. The moisture analyzer can include a tunable diode laser absorption spectrometer (TDLAS) and a natural gas sample conditioning system. The TDLAS can be configured to detect water vapor content within a natural gas sample. The sample conditioning system can be in fluid communication with the TDLAS and can be configured to condition at least one of temperature, flow rate, and pressure of a natural gas sample. The housing can be configured to receive the moisture analyzer therein and to protect the moisture analyzer from vibration and/or shock.