Apparatus and method for detecting a fraction of a gas
AssigneeEnergy Controls, Inc.
InventorRichard L. Longini
Life of this patent
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Abstract
An apparatus is provided for detecting the quantity of a specific gas hereinafter simply called "gas" in a carrier gas when water vapor is present. The gas and the carrier gas are passed through a whistle chamber which produces a resonating frequency. The resonant frequency changes as a function of the fraction of the gas, temperature and water vapor. An output signal is produced which is a function of the resonant frequency. A correction device senses water vapor and temperature and produces an output signal which is a function of the water vapor and the temperature. A receiving means receives the output signals and produces a resultant signal which is a function of only the fraction of the gas.
Claims5
An apparatus for detecting a fraction of a gas in a carrier gas when water vapor is present comprising:
- (a) whistle means which has a resonant frequency and through which the gas and the carrier gas are passed, the resonant frequency changes as a function of the fraction of the gas, a temperature of the gas, and the water vapor and produces a whistle means output signal which is a function of the resonant frequency;
- (b) correction means which senses the water vapor and the temperature and produces a correction means output signal which is a function of the water vapor and the temperature;
- and
- (c) receiving means receiving the whistle means output signal and the correction means output signal and producing an output signal which is only a function of the fraction of the gas, the receiving means having:
- (i) a timer means which produces a timer means output signal for a preset time;
- and
- (ii) a counter means receiving the whistle means output signal, correction means output signal and the timer means output signal and producing an output signal which is only a function of the fraction of the gas.
Dependencies are inferred from the claim text.