Method and apparatus for indicating a fault condition
First Claim
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1. An apparatus for indicating a fault condition, comprising:
- a machine having a plurality of parameters having levels being dependent upon machine performance;
a sensor connected to said machine and adapted to produce an electrical signal in response to the level of one of said plurality of parameters;
means for automatically identifying a beginning and an end of a trend of said parameter level in response to said electrical signal, said means for automatically identifying reducing the likelihood of premature termination of line segment due to aberrant point;
means for calculating the duration and slope of said trend; and
means for determining whether a first warning threshold is exceeded in response to the duration and slope of said trend, said first warning threshold being a function of duration and slope, wherein if said first warning threshold is exceeded, a fault is indicated.
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Abstract
An apparatus is provided for indicating a fault condition in a machine having a plurality of parameters each having levels being dependent upon machine performance. The apparatus includes a sensor adapted to produce an electrical signal in response to the level of one of the of parameters; and a processor for identifying a trend in the parameter level in response to the electrical signal, calculating the duration and slope of the trend; and determining whether a first warning threshold is exceeded in response to the duration and slope of the trend, the first warning threshold being a function of duration and slope.
102 Citations
16 Claims
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1. An apparatus for indicating a fault condition, comprising:
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a machine having a plurality of parameters having levels being dependent upon machine performance; a sensor connected to said machine and adapted to produce an electrical signal in response to the level of one of said plurality of parameters; means for automatically identifying a beginning and an end of a trend of said parameter level in response to said electrical signal, said means for automatically identifying reducing the likelihood of premature termination of line segment due to aberrant point; means for calculating the duration and slope of said trend; and means for determining whether a first warning threshold is exceeded in response to the duration and slope of said trend, said first warning threshold being a function of duration and slope, wherein if said first warning threshold is exceeded, a fault is indicated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for indicating a fault condition, comprising:
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a machine having a plurality of parameters having levels being dependent upon machine performance; a sensor connected to said machine and adapted to produce an electrical signal in response to the level of one of said plurality of parameters; means for automatically obtaining a beginning and an end of a line segment in response to a plurality of points defined by said electrical signal, said means for automatically obtaining reducing the likelihood of premature termination of the line segment due to aberrant points; means for calculating the duration and slope of said line segment; and means for determining whether a first warning threshold is exceeded in response to the duration and slope of said line segment, said first warning threshold being a function of duration and slope, wherein if said first warning threshold is exceeded, a fault is indicated. - View Dependent Claims (10)
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11. A method for indicating a fault condition, comprising the steps of:
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operating a machine; sensing a machine parameter having a level being dependent upon machine performance and responsively producing an electrical signal in response to the level of said parameter; automatically identifying a beginning and an end of a trend in the parameter level in response to the electrical signal, thereby reducing the likelihood of premature termination of line segment due to aberrant points; calculating the duration and slope of the trend; and determining whether a first warning threshold is exceeded in response to the duration and slope of the trend, the first warning threshold being a function of duration and slope, wherein if said first warning threshold is exceeded, a fault is indicated. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification