Method and system for operating an electromagnetic flowmeter for improving measurements during flow distortion
AssigneeABB Schweiz AG
InventorSubhashish Dasgupta
Life of this patent
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Abstract
An Electromagnetic (EM) flowmeter includes pair of coils powered by currents for generating electromagnetic fields, and pair of electrodes for measuring electromotive forces generated by interaction of electromagnetic and flow fields in fluid. To improve measurements during flow distortion, a system configures current in the pair of coils based on a relation between a distance of the EM flowmeter from flow distorting features in the flow pipe and the characteristic length of the EM flowmeter. Further, based on configuration of current in the pair of coils, signals are generated due to electromotive forces and are measured to estimate flow in the pipe.
Claims10
A method of operating an electromagnetic flowmeter for improving measurements during flow distortion of fluid in a flow pipe, the electromagnetic flowmeter comprising a pair of coils including a top coil and a bottom coil which are powered by currents for generating electromagnetic fields, and a pair of electrodes for measuring electromotive forces generated by an interaction of electromagnetic and flow fields in the fluid, wherein the electromagnetic flowmeter is communicably coupled to a system for measuring signals from the pair of electrodes, the method comprising:
- receiving a pre-measured distance of the electromagnetic flowmeter from a flow distorting feature in the flow pipe, wherein the pre-measured distance is a multiple of a diameter of the flow pipe ranging from 0 to two times the diameter of the flow pipe;
- calibrating, by the system, the current in the pair of coils based on the multiple of the diameter of the flow pipe,
- configuring the current in the pair of coils differently for a first multiple of the diameter, a second multiple of the diameter, and a third multiple of the diameter;
- measuring, by the system, signals due to electromotive forces generated by the interaction of electromagnetic and flow fields based on the configuration of the current in the pair of coils;
- and
- estimating, by the system, a flowrate of the fluid in the flow pipe based on the measured signals.
A system for operating an electromagnetic flowmeter for improving measurements during flow distortion for fluid in a flow pipe, the system comprising:
- at least one electromagnetic flowmeter comprising a pair of coils that includes a top coil and a bottom coil, which are exposed to a current for generating electromagnetic fields;
- and a pair of electrodes for measuring electromotive forces generated by an interaction of electromagnetic and flow fields in the fluid;
- a current controller configured to receive a pre-measured distance of the electromagnetic flowmeter from a flow distorting feature in the flow pipe, wherein the pre-measured distance is a multiple of a diameter of the flow pipe ranging from 0 to two times the diameter of the flow pipe;
- the current controller further configured to calibrate the current to the pair of coils based on the multiple of the diameter of the flow pipe,
- the current controller adapted to configure the current in the pair of coils differently for a first multiple of the diameter, a second multiple of the diameter, and a third multiple of the diameter;
- and
- a processor configured to measure signals from the pair of electrodes due to electromotive forces generated by the interaction of electromagnetic and flow fields based on the configuration of the current in the pair of coils and estimate a flowrate of the fluid in the flow pipe based on the measured signals.
An electromagnetic flowmeter for improving measurements during flow distortion for fluid in a flow pipe, the electromagnetic flowmeter comprising:
- a current controller configured to receive a pre-measured distance of the electromagnetic flowmeter from a flow distorting feature in the flow pipe, wherein the pre-measured distance is a multiple of a diameter of the flow pipe ranging from 0 to two times the diameter of the flow pipe;
- a pair of coils comprising a top coil and a bottom coil that are exposed to a current received from a system for generating electromagnetic fields, wherein the current to the pair of coils is based on the multiple of the diameter of the flow pipe,
- the current controller adapted to configure the current in the pair of coils differently for a first multiple of the diameter, a second multiple of the diameter, and a third multiple of the diameter;
- and
- a pair of electrodes for measuring electromotive forces generated by an interaction of electromagnetic and flow fields in the fluid, wherein signals due to electromotive forces are generated by the interaction of electromagnetic and flow fields based on the configuration of the current in the pair of coils for estimating by the system a flowrate of the fluid in the flow pipe.
Dependencies are inferred from the claim text.