System and method for estimating oxygen concentration in a mixed gas experiencing pressure fluctuations
First Claim
1. A method for estimating gas concentration in a gas mixture having a fluctuating pressure, comprising:
- receiving from a gas sensor a sensor output signal indicating the concentration of a particular gas in the gas mixture, the received sensor output signal varying over time due to the fluctuating pressure of the gas mixture; and
processing the received sensor output signal to determine an estimate of the concentration of the particular gas in the gas mixture, wherein determining an estimate of the concentration includes determining the square root of a zero difference autocorrelation of the sensor output signal.
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Accused Products
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.
164 Citations
21 Claims
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1. A method for estimating gas concentration in a gas mixture having a fluctuating pressure, comprising:
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receiving from a gas sensor a sensor output signal indicating the concentration of a particular gas in the gas mixture, the received sensor output signal varying over time due to the fluctuating pressure of the gas mixture; and processing the received sensor output signal to determine an estimate of the concentration of the particular gas in the gas mixture, wherein determining an estimate of the concentration includes determining the square root of a zero difference autocorrelation of the sensor output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for estimating gas concentration in a gas mixture having a fluctuating pressure, comprising:
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a gas sensor adapted to interact with the gas mixture and generate a sensor output signal indicating the concentration of a particular gas in the gas mixture, the sensor output signal varying over time due to the fluctuating pressure of the gas mixture; at least one processor operatively coupled to the gas sensor; and tangible storage media operatively coupled to the at least one processor, the tangible storage media storing computer-executable instructions for determining an estimate of the concentration of the particular gas in the gas mixture, wherein determining an estimate of the concentration includes determining the square root of a zero difference autocorrelation of the sensor output signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A tangible computer-readable storage medium including computer-executable instructions for estimating gas concentration in a gas mixture having a fluctuating pressure, comprising:
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instructions for receiving from a gas sensor a sensor output signal indicating the concentration of a particular gas in the gas mixture, the received sensor output signal varying over time due to the fluctuating pressure of the gas mixture; and instructions for processing the received sensor output signal to determine an estimate of the concentration of the particular gas in the gas mixture, wherein determining an estimate of the concentration includes determining the square root of a zero difference autocorrelation of the sensor output signal.
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21. A system for estimating gas concentration in a gas mixture having a fluctuating pressure, comprising:
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gas sensing means for sensing a gas mixture and generating an output signal indicating the concentration of a particular gas in the gas mixture, the output signal varying over time due to the fluctuating pressure of the gas mixture; processing means operatively coupled to the gas sensing means; and tangible storage means for storing instructions that, when executed by the processing means, cause the processing means to determine an estimate of the concentration of the particular gas in the gas mixture, wherein determining an estimate of the concentration includes determining the square root of a zero difference autocorrelation of the output signal generated by the gas sensing means.
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Specification