Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Chemical analysis
Reexamination Certificate
2006-06-02
2008-12-02
Wachsman, Hal D (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Chemical analysis
C702S022000, C702S023000, C702S030000, C702S032000
Reexamination Certificate
active
07460959
ABSTRACT:
A method for estimating the concentration of a particular gas in a gas mixture having a fluctuating pressure is provided. A sensor output signal indicating the concentration of a particular gas in the gas mixture is received from a gas sensor. The received sensor output signal may vary over time due to the fluctuating pressure of the gas mixture. The received sensor output signal may be processed to determine an estimate of the concentration of the particular gas in the gas mixture. The processing may include performing an autocorrelation of the signal. In some embodiments, the particular gas is oxygen and the method is used to estimate the concentration of oxygen in a gas mixture having a fluctuating pressure.
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A.K. Demin et al., “Sensor for Measuring the Oxygen Concentration in Gas Mixtures With Unsteady Pressures,” Solid State Ionics , vol. 112, pp. 355-359.
Baker & Botts L.L.P.
Nellcor Puritan Bennett LLC
Wachsman Hal D
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