Method and apparatus for system state classification
First Claim
1. A method for using a computer processor to identify a state of a manufacturing system, comprising;
- defining at least one virtual sensor having a value;
defining at least one state descriptor including a plurality of Boolean condition terms and a trigger probability, each condition term including a logical function of the value of the virtual sensor;
evaluating the condition terms based on the value to determine a classification probability; and
identifying the state responsive to the classification probability being greater to or equal to the trigger probability.
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Abstract
A method for identifying a state of a manufacturing system includes defining at least one virtual sensor having a value. At least one state descriptor including a plurality of condition terms and a trigger probability is defined. Each condition term includes a function of the value of the virtual sensor. The condition terms are evaluated based on the value to determine a classification probability. The state is identified responsive to the classification probability being greater to or equal to the trigger probability. A manufacturing system including a plurality of tools, at least one virtual sensor, and a state classification unit is also provided.
13 Citations
36 Claims
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1. A method for using a computer processor to identify a state of a manufacturing system, comprising;
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defining at least one virtual sensor having a value; defining at least one state descriptor including a plurality of Boolean condition terms and a trigger probability, each condition term including a logical function of the value of the virtual sensor; evaluating the condition terms based on the value to determine a classification probability; and identifying the state responsive to the classification probability being greater to or equal to the trigger probability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for using a computer processor to classify states of a manufacturing system, comprising:
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providing a classification tree having a plurality of nodes for at least a portion of the manufacturing system; defining a plurality of virtual sensors for the manufacturing system, each virtual sensor having a value; defining a state descriptor including a plurality of Boolean condition terms and a trigger probability for each of a subset of the nodes, each condition term including a logical function of the value of at least one of the virtual sensors; and for each of the state descriptors; evaluating the condition terms based on the value to determine a classification probability; and identifying a state associated with the state descriptor responsive to the classification probability being greater to or equal to the trigger probability. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A manufacturing system, comprising:
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a plurality of tools; at least one virtual sensor having a value associated with at least one of the tools; and a state classification unit configured to define at least one state descriptor including a plurality of Boolean condition terms and a trigger probability, each condition term including a logical function of the value of the virtual sensor, evaluate the condition terms based on the value to determine a classification probability, and identify a state responsive to the classification probability being greater to or equal to the trigger probability. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A manufacturing system, comprising:
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a plurality of tools; a plurality of virtual sensors, each having a value associated with at least one of the tools; and a state classification unit configured to manufacturing a classification tree having a plurality of nodes for at least a portion of the manufacturing system, define a state descriptor including a plurality of Boolean condition terms and a trigger probability for each of a subset of the nodes, each condition term including a logical function of the value of at least one of the virtual sensors, and for each of the state descriptors, evaluate the condition terms based on the value to determine a classification probability and identify a state associated with the state descriptor responsive to the classification probability being greater to or equal to the trigger probability.
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35. A system for identifying a state of a manufacturing system comprising:
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means for defining at least one virtual sensor having a value; means for defining at least one state descriptor including a plurality of Boolean condition terms and a trigger probability, each condition term including a logical function of the value of the virtual sensor; means for evaluating the condition terms based on the value to determine a classification probability; and means for ide identifying the state responsive to the classification probability being greater to or equal to the trigger probability.
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36. A system for classifying states of a manufacturing system, comprising:
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means for providing a classification tree having a plurality of nodes for at least a portion of the manufacturing system; means for defining a plurality of virtual sensors for the manufacturing system, each virtual sensor having a value; means for defining a state descriptor including a plurality of Boolean condition terms and a trigger probability for each of a subset of the nodes, each condition term including a logical function of the value of at least one of the virtual sensors; and for each of the state descriptors; means for evaluating the condition terms based on the value to determine a classification probability; and means for identifying a state associated with the state descriptor responsive to the classification probability being greater to or equal to the trigger probability.
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Specification