Complex signal decomposition and modeling
First Claim
1. An apparatus for monitoring the operating condition of a system, comprising:
- sensor means for acquiring a time-varying signal from a single sensor and characterizing operation of the system;
means for decomposing said time-varying signal into a plurality of component signals, each component signal at least partially representing the same time period as all of the other component signals, the component signals providing a plurality of actual component values, at least some of the actual component values from different component signals representing the same moment in time, the plurality of actual component values forming an actual snapshot;
a memory for storing a plurality of reference snapshots of component values for known operating conditions; and
processor means responsive to the decomposing means, disposed to generate estimates of the component values using a similarity operation on the actual component values from the decomposing means with reference to the component values in each reference snapshot in the memory, according to;
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Accused Products
Abstract
A system, method and program product for monitoring a complex signal for ultrasensitive detection of state changes, or for signature recognition and classification is provided. A complex signal is decomposed periodically for empirical modeling. Wavelet analysis, frequency band filtering or other methods may be used to decompose the complex signal into components. A library of signature data may be referenced for selection of a recognized signature in the decomposed complex signal. The recognized signature may indicate data being carried in the complex signal. Estimated signal data may be generated for determination of an operational state of a monitored process or machine using a statistical hypothesis test with reference to the decomposed input signal.
146 Citations
19 Claims
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1. An apparatus for monitoring the operating condition of a system, comprising:
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sensor means for acquiring a time-varying signal from a single sensor and characterizing operation of the system; means for decomposing said time-varying signal into a plurality of component signals, each component signal at least partially representing the same time period as all of the other component signals, the component signals providing a plurality of actual component values, at least some of the actual component values from different component signals representing the same moment in time, the plurality of actual component values forming an actual snapshot; a memory for storing a plurality of reference snapshots of component values for known operating conditions; and processor means responsive to the decomposing means, disposed to generate estimates of the component values using a similarity operation on the actual component values from the decomposing means with reference to the component values in each reference snapshot in the memory, according to; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for monitoring the operating condition of a system, comprising the steps of:
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acquiring a time-varying signal from a single sensor characterizing operation of the system; periodically extracting observations of features from said time-varying signal, each feature relating to a component signal, each component signal at least partially representing the same moment in time as all of the other component signals acquired from the time-carrying signal; generating estimates for at least one of the extracted features responsive to extracting an observation of features, using a similarity operation with reference to a stored library of feature observations characteristic of acceptable operation of said system, according to; - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification