KENNETH C CORMIER
Broker in Billerica, MA
License number
Massachusetts 21734
Issued Date
Feb 1, 1973
Expiration Date
Aug 29, 1990
Type
Salesperson
Address
Address
Billerica, MA 01821
Professional information
Burner Flame Sensing System And Method
US Patent:
5077550, Dec 31, 1991
Filed:
Sep 19, 1990
Appl. No.:
7/584690
Inventors:
Kenneth C. Cormier - Billerica MA
Assignee:
Allen-Bradley Company, Inc. - Milwaukee WI
International Classification:
G08B 1712
US Classification:
340578
Abstract:
The presence of a flame from a burner is determined by analyzing the signal produced by a radiation sensor aimed at a burner. Specifically, a Fourier transformation is applied to the signal producing amplitude values for a spectrum of component frequencies produced by changes in the power of the flame over time. A logarithmic value is derived for each of the amplitude values. The degree of linearity of the distribution of the component frequency logarithmic amplitude values provides an indication of the flame presence. Several parameters, including integrated linear error, linearity regression correlation and slope difference, provide an indication of the degree of linearity. A plurality of values for each of these parameters are produced during an interval of time. When a given percentage of the parameter values are above their respective thresholds the flame is determined to be present, whereas when another given percentage of the parameter values are below their respective threshold the flame is determined to be extinguished.
Method And Apparatus For Linearizing Photoresistive Optical Sensors With Sensitivity-Selective Masking
US Patent:
5218201, Jun 8, 1993
Filed:
May 7, 1991
Appl. No.:
7/696810
Inventors:
Kenneth C. Cormier - Billerica MA
Assignee:
Detector Electronics Corporation - Minneapolis MN
International Classification:
H01J 314
US Classification:
250237R
Abstract:
The linearity of a photoresistive device at varying levels of radiant signal is improved by masking the sensitive area of the photoresistive device so that only a portion of the sensitive area is illuminated. The masking prevents exposure of the entire surface area of the cell, which increases the dynamic range, allowing a more linear, small signal sensitivity over wide variations in brightness.