SYSTEM ABNORMALITIES
First Claim
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1. A monitor to identify an abnormality in a system, the monitor comprising:
- a) a sensor to measure a parameter value of the system;
b) a buffer store;
c) a processor to receive parameter values from the sensor;
select a subset of the parameter values to store in the buffer store; and
calculate a threshold corresponding to normal values of the parameter;
d) an estimator to estimate the next parameter value of the system;
e) a comparator to compare a measured parameter value to the calculated threshold and to store the measured parameter value in the buffer store if the measured parameter value does not exceed the calculated threshold and to store the estimated parameter value in the buffer store if the measured parameter value exceeds the calculated threshold; and
f) a recorder to record a parameter abnormality if the measured parameter value exceeds the calculated threshold.
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Abstract
A monitor and method to identify an abnormality in a system, including a sensor to measure a parameter value of the system. A processor to receive parameter values; select a subset to store in a buffer; and calculate a threshold corresponding to normal values of the parameter. An estimator to estimate the next parameter value. A comparator to compare a measured parameter value to the calculated threshold and to store: the measured parameter value in the buffer if the measured parameter value does not exceed the calculated threshold and the estimated parameter value in the buffer if the measured parameter value exceeds the calculated threshold.
5 Citations
20 Claims
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1. A monitor to identify an abnormality in a system, the monitor comprising:
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a) a sensor to measure a parameter value of the system; b) a buffer store; c) a processor to receive parameter values from the sensor;
select a subset of the parameter values to store in the buffer store; and
calculate a threshold corresponding to normal values of the parameter;d) an estimator to estimate the next parameter value of the system; e) a comparator to compare a measured parameter value to the calculated threshold and to store the measured parameter value in the buffer store if the measured parameter value does not exceed the calculated threshold and to store the estimated parameter value in the buffer store if the measured parameter value exceeds the calculated threshold; and f) a recorder to record a parameter abnormality if the measured parameter value exceeds the calculated threshold. - View Dependent Claims (2, 3)
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4. A method to identify an abnormality in a system, the method comprising iterating steps to:
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a) periodically measure a parameter of the system to form a data series of parameter values; b) select a subset of the parameter values from the data series to store in a buffer of parameter values; c) calculate a threshold corresponding to normal values of the parameter; d) measure the next value of the parameter; e) compare the measured parameter value to the calculated threshold and i) if the measured parameter value does not exceed the calculated threshold, store the measured parameter value in the buffer for subsequent iterations;
orii) if the measured parameter value exceeds the calculated threshold, record as a parameter abnormality, estimate the next parameter value in the data series, and store the estimated parameter value in the buffer for subsequent iterations. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification