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DISTINGUISHING BETWEEN SENSOR AND PROCESS FAULTS IN A SENSOR NETWORK WITH MINIMAL FALSE ALARMS USING A BAYESIAN NETWORK BASED METHODOLOGY

  • US 20120215450A1
  • Filed: 02/22/2012
  • Published: 08/23/2012
  • Est. Priority Date: 02/23/2011
  • Status: Active Application
First Claim
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1. A method for distinguishing between a sensor fault and a process fault in a physical system, the method comprising:

  • designing a Bayesian network to probabilistically relate sensor data in said physical system, wherein said physical system comprises a plurality of sensors;

    collecting said sensor data from said plurality of sensors in said physical system;

    deriving a conditional probability table based on said collected sensor data and said design of said Bayesian network;

    identifying anomalous behavior in said physical system; and

    determining, by a processor, one of said sensor fault and said process fault caused said identified anomalous behavior using belief values for said plurality of sensors and a plurality of processes in said physical system, wherein said belief values indicate a level of trust regarding the status of its associated sensors and processes not being faulty.

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