Multivariate analysis of wireless sensor network data for machine condition monitoring
First Claim
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1. A method for performing maintenance on a system, the method comprising:
- measuring data using a plurality of wireless sensors in a wireless sensor network, the data representing a plurality of modalities of the system;
transmitting the data via wireless radio signals from the wireless sensors to one or more base stations;
comparing the data to a multivariate statistical model representing normal machine conditions, wherein relationships among sensor data representing plural modalities are considered; and
performing maintenance on the system according to results of the comparing;
wherein transmitting the data via wireless radio signals from the wireless sensors to one or more base stations further comprises;
creating a routing topology wherein wireless radio signals are routed from wireless sensors through other wireless sensors to the one or more base stations;
identifying at least one wireless sensor having a degraded signal; and
altering the routing topology to avoid routing wireless radio signals through the one identified wireless sensor.
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Abstract
Machine condition monitoring on a system utilizes a wireless sensor network to gather data from a large number of sensors. The data is processed using a multivariate statistical model to determine whether the system has deviated from a normal condition. The wireless sensor network permits the acquisition of a large number of distributed data points from plural system modalities, which, in turn, yields enhanced prediction accuracy and a reduction in false alarms.
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Citations
20 Claims
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1. A method for performing maintenance on a system, the method comprising:
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measuring data using a plurality of wireless sensors in a wireless sensor network, the data representing a plurality of modalities of the system; transmitting the data via wireless radio signals from the wireless sensors to one or more base stations; comparing the data to a multivariate statistical model representing normal machine conditions, wherein relationships among sensor data representing plural modalities are considered; and performing maintenance on the system according to results of the comparing; wherein transmitting the data via wireless radio signals from the wireless sensors to one or more base stations further comprises; creating a routing topology wherein wireless radio signals are routed from wireless sensors through other wireless sensors to the one or more base stations; identifying at least one wireless sensor having a degraded signal; and altering the routing topology to avoid routing wireless radio signals through the one identified wireless sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-usable medium having computer readable instructions stored thereon for execution by a processor to perform a method for performing maintenance on a system, the method comprising:
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measuring data using a plurality of wireless sensors in a wireless sensor network, the data representing a plurality of modalities of the system; transmitting the data via wireless radio signals from the wireless sensors to one or more base stations; comparing the data to a multivariate statistical model representing normal machine conditions, wherein relationships among sensor data representing plural modalities are considered; and performing maintenance on the system according to results of the comparing; wherein transmitting the data via wireless radio signals from the wireless sensors to one or more base stations further comprises; creating a routing topology wherein wireless radio signals are routed from wireless sensors through other wireless sensors to the one or more base stations; identifying at least one wireless sensor having a degraded signal; and altering the routing topology to avoid routing wireless radio signals through the one identified wireless sensor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification