Flow meter diagnostic processing
First Claim
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1. A system for continuously monitoring performance of a rotary-type gas flow meter, the system comprising:
- a pressure sensor module for measuring a differential pressure (dP) of a gas flowing through the gas flow meter, the pressure sensing module having an output signal;
a processor module; and
a data store communicatively connected with the processor module, the data store storing instructions executable by the processor,wherein the instructions executable by the processor include instructions to calculate a coefficient during a learning phase period, the coefficient based on;
a plurality of measured dP of the gas flowing through the gas flow meter during the learning phase period,a plurality of measured line pressures of the gas flowing through the gas flow meter during the learning phase period,a plurality of measured flow rates of the gas flowing through the gas flow meter during the learning phase period,a plurality of measured temperatures of the gas flowing through the gas flow meter during the learning phase period, anda specific gravity of a gas flowing through a gas flow meter during the learning phase period, andwherein the instructions executable by the processor include instructions to calculate a first dP at a first instance of time, the first dP at the first instance of time based on at least the coefficient.
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Abstract
Apparatus and associated systems and methods relate to automated learning of a baseline differential pressure (dP) characteristic to monitor the performance of a field-installed gas flow meter by comparing on-line dP measurements to the learned baseline dP characteristic. In an exemplary embodiment, a first baseline dP characteristic may be learned in a first mode over a first predetermined period of time according to a first set of learning criteria, and a second baseline dP characteristic may be learned in a second mode over a second predetermined period of time according to a second set of learning criteria. The first period of time may be substantially shorter than the second period of time. The first set of criteria may be substantially more relaxed than the second set of criteria. During the second mode, meter performance degradation may be diagnosed by comparing measured dP against the first baseline dP characteristic.
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Citations
17 Claims
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1. A system for continuously monitoring performance of a rotary-type gas flow meter, the system comprising:
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a pressure sensor module for measuring a differential pressure (dP) of a gas flowing through the gas flow meter, the pressure sensing module having an output signal; a processor module; and a data store communicatively connected with the processor module, the data store storing instructions executable by the processor, wherein the instructions executable by the processor include instructions to calculate a coefficient during a learning phase period, the coefficient based on; a plurality of measured dP of the gas flowing through the gas flow meter during the learning phase period, a plurality of measured line pressures of the gas flowing through the gas flow meter during the learning phase period, a plurality of measured flow rates of the gas flowing through the gas flow meter during the learning phase period, a plurality of measured temperatures of the gas flowing through the gas flow meter during the learning phase period, and a specific gravity of a gas flowing through a gas flow meter during the learning phase period, and wherein the instructions executable by the processor include instructions to calculate a first dP at a first instance of time, the first dP at the first instance of time based on at least the coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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receiving values, the values comprising; a plurality of measured differential pressures (dP) of a gas flowing through a gas flow meter during a learning phase period, a plurality of measured line pressures of the gas flowing through the gas flow meter during the learning phase period, a plurality of measured flow rates of the gas flowing through the gas flow meter during the learning phase period, a plurality of measured temperatures of the gas flowing through the gas flow meter during the learning phase period, and a specific gravity of a gas flowing through a gas flow meter during the learning phase period; calculating, on a computing device, a coefficient based on at least; the plurality of measured dP of the gas flowing through the gas flow meter during the learning phase period, the plurality of measured line pressures of the gas flowing through the gas flow meter during the learning phase period, the plurality of measured flow rates of the gas flowing through the gas flow meter during the learning phase period, the plurality of measured temperatures of the gas flowing through the gas flow meter during the learning phase period, and the specific gravity of a gas flowing through a gas flow meter during the learning phase period; and generating a first dP at a first instance of time based on at least the coefficient. - View Dependent Claims (15, 16, 17)
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Specification
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Current AssigneeNatural Gas Solutions North America, LLC (Baker Hughes Company)
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Original AssigneeDresser Incorporated (Nagano Keiki Company Limited)
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InventorsArtiuch, Roman Leon, Hooks, Paul Stephen
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Primary Examiner(s)Kundu, Sujoy
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Assistant Examiner(s)Desta, Elias
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Application NumberUS12/347,860Publication NumberTime in Patent Office1,854 DaysField of Search702/100, 702 45- 54, 702/85, 702/127US Class Current702/100CPC Class CodesG01F 25/10 of flowmetersG01F 25/15 specially adapted for gas m...G01F 3/08 Rotary-piston or ring-pisto...
