Gas measurement and analysis system
AssigneeElectronic Associates, Inc.
InventorJames F. Muldoon
Life of this patent
Estimating the term…
Abstract
A gas measurement and analysis system having a gas chromatograph which converts a gas mixture from a source to a time varying continuous signal. This signal is sampled and converted to digital form by an analog to digital converter which provides a stream of amplitude dependent digital values at equally spaced time intervals. These sampled signals are applied to a rate of change estimator system which provides an accurate estimate of the time derivative of the sampled signal by means of recursive digital feedback. The output of the estimator system is applied to a processor.
Claims15
A system for measuring and analyzing a gas mixture comprising
- gas processing means for producing a time varying signal related to the constituents of the gas mixture,
- means for sampling and converting to digital form said time varying signal thereby to provide a sampled data signal, and
- digital estimator means for providing a rate of change estimate signal with respect to time of said sampled data signal, said digital estimator means including (1) recursive digital feedback means coupled to an output of said digital estimator means for producing at least one past time value signal of the estimated rate of change signal and (2) feed forward means coupled to the sampling means for producing at least one other past time value signal of the sampled data signal, means for combining both past time value signals with the sampled data signal for producing a signal area defined for an interval and above the amplitude of one of said past time value signals thereby providing the estimated rate of change signal.
A system for gas measurement and analysis comprising
- gas processing means for producing a time varying signal related to the gas,
- means for sampling said time varying signal thereby to provide a sampled data signal, and
- estimator means for providing a rate of change estimate value with respect to time of said sampled data signal, said estimator means including (1) means for recursively feeding back an output of said estimator means for producing at least one past time value of the estimated rate of change value and (2) means for feeding forward an output of said sampling means for producing at least one other past time value of the sampled data signal, means for combining both past time values with the sampled data signal for producing a signal area defined for an interval and above the amplitude of one of said past time value signals thereby providing the estimated rate of change value.
Dependencies are inferred from the claim text.