Process monitoring system, apparatus and method
First Claim
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1. A process monitoring system comprising:
- a plurality of field devices configured to measure state quantities in an industrial process implemented in a plant;
a storage which stores information;
a hardware processor configured to;
determine variation trends of the state quantities, based on time-sequence data output from each of the plurality of field devices, and classify each of the variation trends of the state quantities into one of a plurality of statuses including a constant status, an increasing status, and a decreasing status;
judge, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on;
a change in the classified status for at least one of the state quantities measured by at least one of the plurality of field devices;
a current value of the at least one of the state quantities being at an upper position or a lower position relative to a target position within a range bounded by an upper limit position and a lower limit position for the at least one of the state quantities; and
the status of the change in the classified status relative to the target position; and
control generation of an alarm regarding the at least one of the plurality of field devices measuring the at least one of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists,wherein the storage stores, as the information;
the upper limit position;
the lower limit position;
the target position;
the classified statuses for the state quantities; and
the current value of the at least one of the state quantities.
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Abstract
A process monitoring system includes: a plurality of field devices configured to measure state quantities in an industrial process implemented in a plant; a trend calculation unit configured to determine the variation trend of the state quantities based on time-sequence data output from each of the plurality of field devices and classify each of the variation trends of the state quantities into one of a pre-established plurality of statuses; a state change judgment unit configured to judge the existence or non-existence of a pre-indicator of a change in the plant state, in accordance with the existence or non-existence of a change in at least one of the statuses classified by the trend calculation unit; and a notification unit configured to notify of judgment results of the state change judgment unit.
48 Citations
22 Claims
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1. A process monitoring system comprising:
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a plurality of field devices configured to measure state quantities in an industrial process implemented in a plant; a storage which stores information; a hardware processor configured to; determine variation trends of the state quantities, based on time-sequence data output from each of the plurality of field devices, and classify each of the variation trends of the state quantities into one of a plurality of statuses including a constant status, an increasing status, and a decreasing status; judge, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on; a change in the classified status for at least one of the state quantities measured by at least one of the plurality of field devices; a current value of the at least one of the state quantities being at an upper position or a lower position relative to a target position within a range bounded by an upper limit position and a lower limit position for the at least one of the state quantities; and the status of the change in the classified status relative to the target position; and control generation of an alarm regarding the at least one of the plurality of field devices measuring the at least one of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists, wherein the storage stores, as the information; the upper limit position; the lower limit position; the target position; the classified statuses for the state quantities; and the current value of the at least one of the state quantities. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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2. A process monitoring system comprising:
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a plurality of field devices configured to measure state quantities in an industrial process implemented in a plant; a storage which stores information; a hardware processor configured to; determine variation trends of the state quantities, based on time-sequence data output from each of the plurality of field devices, and classify each of the variation trends of the state quantities into one of a plurality of statuses including a constant status, an increasing status, and a decreasing status; and judge, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on a relationship between an operating mode set for the plant and the classified status for each of at least two of the state quantities respectively measured by at least two of the plurality of field devices; and control generation of an alarm regarding the at least two of the plurality of field devices measuring the at least two of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists, wherein the storage stores, as the information, relationships between; the pre-indicator; the change in the classified status; the operating mode; and the classified statuses for the state quantities. - View Dependent Claims (20)
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18. A process monitoring apparatus comprising:
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a storage which stores information; and a hardware processor configured to; determine variation trends of state quantities and classify each of the variation trends of the state quantities into one status of a plurality of statuses including a constant status, an increasing status, and a decreasing status, the determination being made based on time-sequence data output from each of a plurality of field devices for measuring the state quantities in an industrial process implemented in a plant; judge, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on; a change in the classified status for at least one of the state quantities measured by at least one of the plurality of field devices; a current value of the at least one of the state quantities being at an upper position or a lower position relative to a target position within a range bounded by an upper limit position and a lower limit position for the at least one of the state quantities; and the status of the change in the classified status relative to the target position; and control generation of an alarm regarding the at least one of the plurality of field devices measuring the at least one of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists, wherein the storage stores, as the information; the upper limit position; the lower limit position; the target position; the classified statuses for the state quantities; and the current value of the at least one of the state quantities.
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19. A process monitoring method comprising:
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collecting time-sequence data output from each of a plurality of field devices measuring state quantities in an industrial process implemented in a plant; storing information in a storage; determining a variation trend of the state quantities, and classifying the variation trends of the state quantities into one of a plurality of statuses including a constant status, an increasing status, and a decreasing status, the determination being made based on the collected time-sequence data; judging, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on; a change in the classified status for at least one of the state quantities measured by at least one of the plurality of field devices; a current value of the at least one of the state quantities being at an upper position or a lower position relative to a target position within a range bounded by an upper limit position and a lower limit position for the at least one of the state quantities; and the status of the change in the classified status relative to the target position; and controlling generation of an alarm regarding the at least one of the plurality of field devices measuring the at least one of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists, wherein the storage stores, as the information; the upper limit position; the lower limit position; the target position; the classified statuses for the state quantities; and the current value of the at least one of the state quantities.
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21. A process monitoring apparatus comprising:
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a storage which stores information; and a hardware processor configured to; determine variation trends of state quantities and classify each of the variation trends of the state quantities into one status of a plurality of statuses including a constant status, an increasing status, and a decreasing status, the determination being made based on time-sequence data output from each of a plurality of field devices for measuring the state quantities in an industrial process implemented in a plant; judge, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on a relationship between an operating mode set for the plant and the classified status for each of at least two of the state quantities respectively measured by at least two of the plurality of field devices; and control generation of an alarm regarding the at least two of the plurality of field devices measuring the at least two of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists, wherein the storage stores, as the information, relationships between; the pre-indicator; the change in the classified status; the operating mode; and the classified statuses for the state quantities.
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22. A process monitoring method comprising:
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collecting time-sequence data output from each of a plurality of field devices measuring state quantities in an industrial process implemented in a plant; storing information in a storage; determining a variation trend of the state quantities, and classifying the variation trends of the state quantities into one of a plurality of statuses including a constant status, an increasing status, and a decreasing status, the determination being made based on the collected time-sequence data; judging, by using the information stored in the storage, whether a pre-indicator of a change in a plant state exists or whether the pre-indicator of the change in the plant state does not exist, the judgment being made based on a relationship between an operating mode set for the plant and the classified status for each of at least two of the state quantities respectively measured by at least two of the plurality of field devices; and controlling generation of an alarm regarding the at least two of the plurality of field devices measuring the at least two of the state quantities resulting in the judgment being made of the pre-indicator of the change in the plant state exists, wherein the storage stores, as the information, relationships between; the pre-indicator; the change in the classified status; the operating mode; and the classified statuses for the state quantities.
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Specification
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Current AssigneeYokogawa Electric Corporation
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Original AssigneeYokogawa Electric Corporation
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InventorsKobayashi, Satoshi, Takahashi, Kimikazu, Tanaka, Mihoko
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Primary Examiner(s)DUNN, DARRIN D
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Application NumberUS13/903,394Publication NumberTime in Patent Office1,757 DaysField of SearchUS Class CurrentCPC Class CodesG05B 19/41875 characterised by quality su...G05B 23/0243 model based detection metho...
