SYSTEMS AND METHODS FOR FAULT DETECTION AND HANDLING BY ASSESSING BUILDING EQUIPMENT PERFORMANCE
First Claim
1. A system for detecting faults in building equipment, the system comprising:
- an integration fault detector configured to detect faults in the building equipment by analyzing time series data using an integration fault detection technique;
a kernel density fault detector configured to detect faults in the building equipment by analyzing the time series data using a kernel density estimation fault detection technique; and
a fault detector selector configured to select the integration fault detector or the kernel density fault detector for use in detecting faults in the building equipment based on an attribute of the time series data.
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Accused Products
Abstract
A system for detecting faults in building equipment includes an integration fault detector, a kernel density fault detector, and a fault detector selector. The integration fault detector is configured to detect faults in the building equipment by analyzing time series data using an integration fault detection technique. The kernel density fault detector is configured to detect faults in the building equipment by analyzing the time series data using a kernel density estimation fault detection technique. The fault detector selector is configured to select the integration fault detector or the kernel density fault detector for use in detecting faults in the building equipment based on an attribute of the time series data.
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Citations
29 Claims
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1. A system for detecting faults in building equipment, the system comprising:
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an integration fault detector configured to detect faults in the building equipment by analyzing time series data using an integration fault detection technique; a kernel density fault detector configured to detect faults in the building equipment by analyzing the time series data using a kernel density estimation fault detection technique; and a fault detector selector configured to select the integration fault detector or the kernel density fault detector for use in detecting faults in the building equipment based on an attribute of the time series data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for detecting faults in building equipment using an integration fault detection technique, the method comprising:
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receiving time series data comprising a plurality of data points each having a value affected by operating the building equipment; calculating a modified z-score for each of the plurality of data points; calculating a distance value for each of the plurality of data points, the distance value indicating a difference between the modified z-score for the data point and an outlier threshold; generating, for each of the plurality of data points, a cumulative sum of the distance values calculated for the data point and any previous data points in the time series data; calculating, for each of the plurality of data points, a performance metric based on the cumulative sum for the data point; and detecting faults in the building equipment by comparing the calculated performance metrics to one or more performance thresholds. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for detecting faults in building equipment using a kernel density fault detection technique, the method comprising:
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receiving time series data comprising a plurality of data points each having a value affected by operating the building equipment; calculating a modified z-score for each of the plurality of data points; generating a kernel density distribution based on the modified z-scores; generating a cumulative distribution function based on the kernel density distribution; determining one or more control chart thresholds using the cumulative distribution function; and detecting faults in the building equipment by applying control chart rules and the control chart thresholds to the modified z-scores. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification