Methods and systems for improving measurement of operating electromagnetic flowmeters during flow distortion.

Abstract

This disclosure provides a method and system (200) for improving measurement during flow distortion in a flow conduit (109) using an operating electromagnetic (EM) flowmeter (100). The EM flowmeter (100) includes a pair of coils (101, 103) powered by an electric current to generate an electromagnetic field, and a pair of electrodes (105, 107) for measuring the electromotive force generated by the interaction of the electromagnetic field and the flow field in the fluid. To improve measurement during flow distortion, the system (200) configures the current in the coil pairs (C1, C2) (101, 103) based on the relationship between the distance of the EM flowmeter (100) from the flow distortion feature in the flow conduit (109) and the characteristic length of the EM flowmeter (100). Furthermore, based on the configuration of the current in the coil pairs (C1, C2) (101, 103), the signal generated due to the electromotive force is measured. Therefore, based on the measured signal, the flow velocity of the fluid in the flow conduit (109) is estimated.

Description

Technical Field

[0001] The present invention generally relates to an electromagnetic (EM) flow meter, and more specifically to an electromagnetic flow meter for operation during flow distortion of fluid in a flow channel to improve measurement. Background Technology

[0002] Electromagnetic flow meters are devices used to measure the flow velocity of fluids. EM flow meters are suitable for all conductive liquids, such as water, acids, alkalis, slurries, and many other liquids. Typically, EMs are non-invasive and have no moving parts, thus reducing the risk of failure and the frequency of maintenance. However, one cause of concern in the operation of electromagnetic flow meters is the decrease in measurement accuracy due to flow distortion or velocity profile distortion caused by upstream features (or pipe interference) such as, but not limited to, bends, valves, elbows, and T-joints.

[0003] Therefore, like many other flow sensors, the measurement accuracy of electromagnetic flowmeters can be affected by upstream flow distortion features such as bends. In existing systems, many techniques have been implemented to mitigate errors in velocity readings caused by flow distortion effects. For example, while regulating the fluid before it enters the flowmeter section is a successful method, this results in pressure drop, requires changes to the flowmeter cross-section, and / or the use of additional components. A common extreme case in the field is where the space for installing the flowmeter is no more than zero to one times the pipe diameter from the upstream bend. Restructuring the flow by using a flow reformer such as a perforated plate at the flowmeter inlet results in a high pressure drop and is not a feasible approach.

[0004] Furthermore, non-invasive methods for overcoming flow distortion effects have been tested and implemented. However, these methods involve additional components and require undesirable changes to the EM's hardware. Multiple electrodes can be used to acquire several sets of readings at different levels within the flowmeter pipe, and these readings can be averaged to overcome the flow distortion effect. However, this method exposes the flowmeter to a higher chance of leakage and results in additional hardware requirements with associated higher costs. Extended electrodes can be used to acquire averaged flow readings, but this is prone to other noise problems, such as particle bombardment on the electrode surfaces.

[0005] Therefore, distortion of fluid flow rate or velocity profile can affect the accuracy of fluid velocity measurement. However, accurate velocity measurement can be crucial in industrial processes to ensure the optimization of such processes and the velocity measurement of EM flow meters. Therefore, it is necessary to reduce flow distortion in EM flow meters to minimize its adverse effects on industrial processes. Summary of the Invention

[0006] According to various embodiments, this disclosure provides a method and system for improving measurement using an operating electromagnetic (EM) flowmeter during flow distortion of fluid in a flow passage. Distortion in the flow passage occurs, for example, at least upstream or downstream of the EM flowmeter, such as a bend, T-joint, etc. The EM flowmeter includes a coil pair and an electrode pair, the coil pair including a top coil (C1) and a bottom coil (C2) powered by current to generate an electromagnetic field, and the electrode pair for measuring an electromotive force generated by the interaction of the electromagnetic field and the flow field in the fluid. The EM flowmeter is communicatively coupled to a system for measuring a signal from the electrode pair. To improve measurement during flow distortion of fluid in the flow passage, the method includes configuring the current in the coil pair (C1, C2) based on a relationship between the distance of the flowmeter from the flow distortion feature in the flow passage and the characteristic length of the flowmeter. Furthermore, the method includes measuring the signal caused by the electromotive force generated due to the interaction of the electromagnetic field and the flow field based on the configuration of the current in the coil pair (C1, C2). Based on the measured signal, the method includes estimating the flow velocity of the fluid in the flow passage.

[0007] According to this embodiment, when the distance between the flow meter and the flow distortion feature is a first predefined multiple of the flow meter's characteristic length, the coil pair (C1, C2) is biased with a first current value. In one embodiment, the first predefined multiple is twice the flow meter's characteristic length.

[0008] According to this embodiment, when the distance between the flow meter and the flow distortion feature is a second predefined multiple of the flow meter's feature length, the current to the coil pair is configured for a predefined duration in an alternating first and second phase. In the first phase, the top coil (C1) is biased at half a first current value and the bottom coil (C2) is biased at three times the current value of the top coil (C1). In the second phase, the current to the top coil (C1) is deactivated and the bottom coil (C2) is biased at four times the first current value.

[0009] According to this embodiment, the second predefined multiple of the distance is within the characteristic length of the flow meter.

[0010] According to this embodiment, when the distance between the flow meter and the flow distortion feature is the third predefined multiple of the flow meter's feature length, the current to the top coil (C1) is deactivated and the bottom coil (C2) is biased at four times the first current value.

[0011] According to this embodiment, the third predefined multiple of the distance is between the characteristic length of the flow meter and twice the characteristic length of the flow meter.

[0012] One embodiment of this disclosure discloses a system for operating an EM flow meter to improve measurements during flow distortion of fluid in a flow channel. Without limiting the scope of the invention, the system enables the operation of the EM flow meter to generate accurate and acceptable fluid velocity data. The system includes at least one flow meter comprising a coil pair and an electrode pair, the coil pair having a top coil (C1) and a bottom coil (C2) exposed to current to generate an electromagnetic field, the electrode pair being used to measure the electromotive force generated by the interaction of the electromagnetic field in the fluid. The system includes a current controller for configuring the current to the coil pair (C1, C2) based on a relationship between the distance of the flow meter from the flow distortion feature and the characteristic length of the flow meter. By providing a unique combination of coil power supply modes based on the relationship between the distance of the flow meter from the flow distortion feature and the characteristic length of the flow meter, the system minimizes flow distortion and the resulting errors. In addition, the system includes a processor configured to measure a signal from the electrode pair caused by the electromotive force generated by the interaction of the electromagnetic field and the flow field based on the configuration of the current in the coil pair (C1, C2), and to estimate the flow velocity of the fluid in the flow pipe based on the measured signal.

[0013] Another embodiment of this disclosure discloses an electromagnetic flowmeter for improving measurement during flow distortion of fluid in a flow channel. The electromagnetic flowmeter includes a coil pair comprising a top coil (C1) and a bottom coil (C2) exposed to current received from the system to generate an electromagnetic field and a flow field. This current is based on the relationship between the distance of the flowmeter from the flow distortion and the characteristic length of the flowmeter. Furthermore, the electromagnetic flowmeter includes an electrode pair for measuring the electromotive force generated by the interaction of the electromagnetic field and the flow field in the fluid. Based on the configuration of the current in the coil pair (C1, C2), a signal due to the electromotive force is generated by the interaction of the electromagnetic fields to estimate the flow velocity of the fluid in the flow channel. Attached Figure Description

[0014] After a general description of exemplary embodiments of the present disclosure, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and in which:

[0015] Figure 1A A schematic diagram of an exemplary electromagnetic flowmeter according to an embodiment of the present disclosure is shown;

[0016] Figures 1B to 1C A cross-section of a flow pipe near a bend in an electromagnetic flow meter of FIG1, according to an embodiment of the present disclosure, is shown.

[0017] Figure 2 A system for improving measurement of an operating electromagnetic flowmeter during flow distortion of fluid in a flow channel, according to an embodiment of the present disclosure, is shown.

[0018] Figures 3A to 3B A graphical representation of a coil-powered mode for an electromagnetic flowmeter according to an alternative embodiment of the present disclosure is shown; and

[0019] Figure 4 This is a flowchart of a method for operating an electromagnetic flowmeter to improve measurement during flow distortion of fluid in a flow channel, according to an embodiment of the present invention. Detailed Implementation

[0020] In the following description, numerous specific details are set forth for purposes of explanation and to provide a thorough understanding of this disclosure. However, it will be apparent to those skilled in the art that this disclosure can be practiced without these specific details. In other instances, apparatus and methods are shown in block diagram form only to avoid obscuring this disclosure.

[0021] References to "an embodiment" or "embodiment" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of this disclosure. The appearance of the phrase "in an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor does it mean that a single or alternative embodiment is mutually exclusive with other embodiments. Furthermore, the terms "a" and "an" as used herein do not indicate a limitation of quantity, but rather the presence of at least one of the referenced items. In addition, various features that may be manifested by some embodiments but not by others are described. Similarly, various requirements are described that may be requirements of some embodiments but not of others.

[0022] Some embodiments of this disclosure will now be described more fully with reference to the accompanying drawings, which illustrate some, but not all, embodiments of the invention. In fact, various embodiments of the invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. The same reference numerals refer to the same elements throughout. The use of any terminology should not be construed as limiting the spirit and scope of the embodiments of the invention.

[0023] The embodiments described herein are for illustrative purposes and many variations are possible. It should be understood that various omissions and equivalents may be considered as appropriate to suit the application or implementation, but are intended to cover the application or implementation without departing from the spirit or scope of this disclosure. Furthermore, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be construed as restrictive. Any headings used in this specification are for convenience only and have no legal or limiting effect.

[0024] According to an example embodiment, this document provides a method, system, and electromagnetic (EM) flowmeter for improving measurement during flow distortion of fluid in a flow channel. The methods, systems, and EM flowmeters disclosed herein provide measures for improving measurement in an EM during flow distortion of fluid through a flow channel to ensure accurate flow rate generation, which can be crucial for various industrial processes, such as, but not limited to, water treatment plants, oil refineries, and the pharmaceutical industry.

[0025] refer to Figure 1A An exemplary electromagnetic (EM) flow meter 100 suitable for measuring the flow rate of fluid in a flow pipe is shown. In one embodiment, the EM flow meter 100 operates according to Faraday's law of electromagnetic induction. The EM flow meter 100 includes a pipe with an insulating gasket inside. Figure 1A (Not shown in the diagram) and in contact with the fluid in the pipe. On both sides, the EM flow meter 100 includes coil pairs, including a top coil C1 (101) and a bottom coil C2 (103) powered by an electric current to generate an electromagnetic field. Essentially, the generated electromagnetic field interacts with the fluid velocity and induces an electromotive force (EMF) within the fluid domain. To measure the EMF, the EM flow meter 100 includes electrode pairs (105, 107) on both sides. In one embodiment, the EM flow meter 100 may include a display for indicating the flow rate of the fluid in the determined flow pipe.

[0026] Typically, the flow velocity is estimated using the measured EMF, proportional to the velocity or flow rate, by referring to a calibration factor provided during laboratory testing. The calibration factor is, or directly relates to, the ratio of induced electromotive force to velocity obtained under ideal laboratory conditions, where sufficient pipe length upstream of the flow meter is ensured to avoid flow distortion. However, in the field, there may be situations where existing EM flow meters are located near upstream or downstream bends and distortion may occur, leading to flow measurement errors. This is in... Figure 1B As shown in the figure, Figure 1B A cross-section of a flow pipe 109 with an electromagnetic flow meter located near an upstream bend is shown. In one embodiment, the distance of the EM flow meter 100 from the bend is expressed as a multiple of its pipe inner diameter (D).

[0027] Since the signal acquired from the EM flow meter 100 depends on the velocity distribution, any flow distortion features in the velocity profile or distribution will cause errors in the measurement. Flow distortion features in the flow conduit 109 occur at least upstream or downstream pipe joints of the EM flow meter 100, such as bends, T-joints, etc. To overcome these flow distortion features, this disclosure operates the EM flow meter 100 by facilitating power supply to the coil pair (101, 103) based on a unique pattern depending on several factors. The EM flow meter 100 is communicatively coupled to, for example, Figure 2 The system shown measures the signal from the electrode pair and generates the flow rate of the EM flow meter 100. (As shown) Figure 1B As shown, the system configures the current in the coil pair (C1, C2) (101, 103) based on the relationship between the distance of the EM flow meter 100 from the flow distortion feature in the flow conduit 109 and the characteristic length (L) of the EM flow meter 100. Typically, the coil pair (101, 103) is biased with a first current value (e.g., X amperes) when the distance of the EM flow meter 100 from the flow distortion feature is a first predefined multiple of the characteristic length (L) of the EM flow meter 100. In one embodiment, the first predefined multiple indicates twice the characteristic length (L) of the EM flow meter 100. Figure 3A A graphical representation of the aforementioned coil power supply scheme for the EM flow meter 100 is shown. For example... Figure 3A As shown, C1 (101) and C2 (103) are both configured with the same first current value of X amperes.

[0028] return Figure 1A Consider the case where the distance between the EM flowmeter 100 and the flow distortion feature is a second predefined multiple of the characteristic length of the EM flowmeter 100. This second predefined multiple of the distance is within the characteristic length (L) of the EM flowmeter 100. That is, for example, the distance between the EM flowmeter 100 and the bend is "0 to 1" times (0D to 1D) the diameter of the flow pipe 109. In this case, during the alternating first and second phases, the system configures the current to the coil pair (101, 103) for a predefined duration (e.g., "t" seconds). For example, in the first phase, the top coil (C1) (101) is biased at half a first current value, and the bottom coil (C2) (103) is biased at three times the current of the top coil (C1). In other words, based on the above representation, in the first phase, the top coil (C1, 101) is at X / 2 amperes, and the bottom coil (C2, 103) is at 3X / 2 amperes. After a predefined duration or "t" seconds, the second phase begins for "t" seconds, during which the current to the top coils (C1, 101) is deactivated and the bottom coils (C2, 103) are biased at four times the first current value.

[0029] In other words, in the second stage, the top coil (C1, 101) is at zero amperes and the bottom coil (C2, 103) is at 4X amperes. Figure 3B A graphical representation of the aforementioned coil power supply scheme for the EM flow meter 100 is shown. For example... Figure 3B As shown, the first stage (stage 1) and the second stage (stage 2) are depicted based on the current configuration. Essentially, the signals obtained from the first stage and the second stage are averaged for further processing. Figure 1CA cross-section of a flow pipe 109 with an electromagnetic flow meter having a bend at 1D is shown. Similarly, another bend case is considered, where the distance of the EM flow meter 100 from the flow distortion feature is a third predefined multiple of the characteristic length (L) of the EM flow meter 100.

[0030] In one embodiment, the third predefined multiple of the distance is between the characteristic length (L) of the EM flowmeter 100 and twice the characteristic length of the EM flowmeter 100. In other words, the distance between the EM flowmeter 100 and the bend is greater than 1D but less than 2D. In this case, the current is configured such that the current to the top coil (C1, 101) is deactivated and the bottom coil (C2, 103) is biased at four times the first current value. That is, C1 (101) is at zero amperes, while C2 (103) is at 4X amperes.

[0031] return Figure 1A Once current is supplied to the coil pair (101, 103) based on any of the above configurations, a signal caused by the electromotive force generated by the interaction of the electromagnetic field and the flow field is measured, and the flow velocity of the fluid in the flow conduit 109 is estimated based on the measured signal. The flow velocity of the fluid can be estimated according to techniques known in the art. Therefore, by configuring current to the coil pair (101, 103), the error associated with distortion is ensured to be reduced to an acceptable minimum based on the above relationship. Furthermore, since the present invention only requires modification of the coil current configuration, the present invention eliminates the requirement for additional hardware to the EM flow meter 100.

[0032] Figure 2 A block diagram of a system 200 for improving measurement during flow distortion of fluid in a flow channel is shown. System 200 includes, as... Figure 1A The system includes at least one EM flow meter 100, a current controller 201, and a processor 203. The current controller 201 configures the current to the coil pair (101, 103) of the EM flow meter 100 based on the relationship between the distance of the EM flow meter 100 from the flow distortion feature and the characteristic length of the EM flow meter 100. The current controller 201 includes details regarding the location of each EM flow meter 100 within the flow conduit 109. That is, each EM flow meter 100 is located at a specific distance from the flow conduit 109, based on which bends can be detected, and the configuration of the current to the coil pair (101, 103) varies. Therefore, according to the relationship determined based on the details of each EM flow meter 100, the current controller 201 can configure the current to the coil pair (101, 103).

[0033] That is, for example, when the distance between the EM flowmeter 100 and the bend is "0" to 1 (0D to 1D) times the diameter of the flow pipe 109, in this case, during the alternating first and second phases, the current controller 201 will configure the current to the coil pair (101, 103) for a predefined duration. In the first phase, the current controller 201 configures the top coil (C1, 101) with X / 2 amps and the bottom coil (C2, 103) with 3X / 2 amps. After the predefined duration or "t" seconds, in the second phase, the current controller 201 configures the top coil (C1, 101) with zero amps and the bottom coil (C2, 103) with 4X amps. In another bend relationship, when the distance between the EM flowmeter 100 and the bend is greater than 1D but less than 2D, in this case, the current controller 201 configures the top coil (C1, 101) with zero amps and C2, 103 with 4X amps.

[0034] Furthermore, the processor 203 is configured to measure the signal from the electrode pair (105, 107) caused by the electromotive force generated due to the interaction of the electromagnetic field and the flow field, based on a configuration provided by the current controller 201. Based on the measured signal, the processor 203 estimates the flow velocity of the fluid in the flow pipe 109.

[0035] Figure 4 A flowchart of an operating electromagnetic flowmeter for improving measurement during flow distortion of fluid in a flow channel, according to an embodiment of the present invention, is shown.

[0036] The EM flow meter 100 is communicatively coupled to the system 200 to operate and improve measurement during flow distortion of the fluid in the flow channel. The steps of method 400 are performed by the system 200, which may include at least one EM flow meter 100.

[0037] Method 400 includes a first step 401, namely, configuring the current in the coil pair (101, 103) based on the relationship between the distance of the EM flow meter 100 from the flow distortion characteristics in the flow pipe 109 and the characteristic length (L) of the EM flow meter 100.

[0038] Consider that, in the first case, when the distance between the EM flow meter 100 and the flow distortion feature is a first predefined multiple of the characteristic length (L) of the EM flow meter 100, the coil pair (101, 103) is biased with a first current value (e.g., X amperes). In one embodiment, the first predefined multiple indicates twice the characteristic length (L) of the EM flow meter 100.

[0039] Consider the second case, where the distance between the EM flowmeter 100 and the flow distortion feature is a second predefined multiple of the characteristic length of the EM flowmeter 100. This second predefined multiple of the distance is within the characteristic length (L) of the EM flowmeter 100. That is, for example, the distance between the EM flowmeter 100 and the bend is "0 to 1" times (0D to 1D) the diameter of the flow pipe 109. In this case, during the alternating first and second phases, the current to the coil pair (101, 103) is configured for a predefined duration. For example, in the first phase, the top coil (C1) (101) is biased at half a first current value, and the bottom coil (C2) (103) is biased at three times the current of the top coil (C1). In other words, based on the above representation, in the first phase, the top coil (C1, 101) is at X / 2 amperes, and the bottom coil (C2, 103) is at 3X / 2 amperes. After a predefined duration or "t" seconds, the second phase begins for "t" seconds, during which the current to the top coils (C1, 101) is deactivated and the bottom coils (C2, 103) are biased at four times the first current value.

[0040] Similarly, considering the third case, when the distance between the EM flow meter 100 and the flow distortion feature is a third predefined multiple of the feature length (L) of the EM flow meter 100.

[0041] The third predefined multiple of the distance is between the characteristic length (L) of the EM flowmeter 100 and twice the characteristic length of the EM flowmeter 100. In this case, the current is configured such that the current to the top coil (C1, 101) is deactivated and the bottom coil (C2, 103) is biased at four times the first current value. That is, C1 (101) is at zero amperes, while C2 (103) is at 4 times amperes.

[0042] In the next step, at 403, a signal caused by the electromotive force generated by the interaction of the electromagnetic field and the fluid field, based on the configuration of the current in the coil pair (101, 103), is measured. When the current in the coil pair (101, 103) is based on the second case described above, this signal is measured by taking into account the average of the signals from the first and second stages.

[0043] In step 405, the flow velocity of the fluid in the flow channel 109 is estimated based on the measured signal. The calculation of the flow velocity based on the measured signal can be assumed according to techniques known to those skilled in the art.

[0044] By using the current configuration based on the above relationship, the error caused by current distortion is reduced by, for example, nearly 40 times due to the change in the power supply mode of the coil pair (101, 103).

[0045] One embodiment of this disclosure provides a low-cost, non-invasive technique to ensure independence of flow distortion.

[0046] The embodiments disclosed herein ensure a reliable and accurate flow sensor capable of high performance under extreme conditions.

[0047] The embodiments disclosed herein ensure the independence of the flow profile without causing pressure drop or additional energy consumption.

[0048] With the help of the teachings given in the foregoing description and the accompanying drawings, those skilled in the art will conceive of many modifications and other embodiments disclosed herein. Therefore, it should be understood that the disclosure is not limited to the specific embodiments disclosed, and that modifications and other embodiments are intended to be included within the scope of the appended claims.

[0049] Furthermore, while the foregoing description and related figures describe exemplary embodiments in the context of certain example combinations of elements and / or functions, it should be understood that alternative embodiments may provide different combinations of elements and / or functions without departing from the scope of the appended claims. In this regard, for example, different combinations of elements and / or functions explicitly described above are also considered, as set forth in some of the appended claims. Although specific terms are used herein, they are used only in a general and descriptive sense and not for limiting purposes.

[0050] Figure Labels

[0051]

[0052]

Claims

1. A method of operating an electromagnetic flowmeter (100) for improving measurement during flow distortion of a fluid in a flow conduit (109), the electromagnetic flowmeter (100) comprising a coil pair and an electrode pair (105, 107), the coil pair comprising a top coil (C1) (101) and a bottom coil (C2) (103) powered by an electric current to generate an electromagnetic field, the electrode pair (105, 107) for measuring an electromotive force generated by the interaction of an electromagnetic field and a flow field in the fluid, wherein the electromagnetic flowmeter (100) is communicatively coupled to a system (200) for measuring signals from the electrode pair (105, 107), the method comprising: The system (200) configures the current in the coil pairs (C1, C2) (101, 103) based on the relationship between the distance of the electromagnetic flowmeter (100) from the flow distortion characteristics in the flow pipe (109) and the characteristic length of the electromagnetic flowmeter (100); The system (200) measures the signal caused by the electromotive force generated due to the interaction of the electromagnetic field and the flow field based on the configuration of the currents in the coil pairs (C1, C2) (101, 103); as well as The system (200) estimates the flow rate of the fluid in the flow pipe (200) based on the measured signal.

2. The method according to claim 1, wherein the flow distortion feature in the flow conduit (109) is one of the upstream or downstream of the electromagnetic flowmeter (100).

3. The method according to claim 1, wherein when the distance between the electromagnetic flowmeter (100) and the flow distortion feature is a first predefined multiple of the feature length of the electromagnetic flowmeter (100), the coil pair (C1, C2) (101, 103) is biased with a first current value.

4. The method according to claim 3, wherein the first predefined multiple is twice the characteristic length of the electromagnetic flowmeter (100).

5. The method according to claim 1, wherein when the distance of the electromagnetic flowmeter (100) from the flow distortion feature is a second predefined multiple of the feature length of the electromagnetic flowmeter (100), the current to the coil pair (101, 103) is configured for a predefined duration in alternating first and second phases, wherein in the first phase, the top coil (C1) (101) is biased at half a first current value and the bottom coil (C2) (103) is biased at three times the current of the top coil (C1) (101), and in the second phase, the current to the top coil (C1) (101) is deactivated and the bottom coil (C2) (103) is biased at four times the current value.

6. The method of claim 5, wherein the second predefined multiple of the distance is within the characteristic length of the electromagnetic flowmeter (100).

7. The method according to claim 1, wherein when the distance of the electromagnetic flowmeter (100) from the flow distortion feature is a third predefined multiple of the feature length of the electromagnetic flowmeter (100), the current to the top coil (C1) (101) is deactivated, and the bottom coil (C2) (103) is biased at four times the first current value.

8. The method according to claim 7, wherein the third predefined multiple of the distance is between the characteristic length of the electromagnetic flowmeter (100) and twice the characteristic length of the electromagnetic flowmeter (100).

9. A system (200) for operating an electromagnetic flowmeter (100) to improve measurement during flow distortion of fluid in a flow conduit (109), said system (200) comprising: At least one electromagnetic flowmeter (100), comprising: The coil pair (101, 103) includes a top coil (C1) (101) and a bottom coil (C2) (103) exposed to current to generate an electromagnetic field; and Electrode pair (105, 107) is used to measure the electromotive force generated by the interaction of electromagnetic field and flow field in fluid; A current controller (201) is configured to configure the current to the coil pair (C1, C2) (101, 103) based on the relationship between the distance of the electromagnetic flowmeter (100) from the flow distortion characteristic and the characteristic length of the electromagnetic flowmeter (100); and The processor (203) is configured to measure the signal from the electrode pair (105, 107) caused by the electromotive force generated due to the interaction of the electromagnetic field and the flow field based on the configuration of the current in the coil pair (C1, C2) (101, 103), and to estimate the flow rate of the fluid in the flow pipe (109) based on the measured signal.

10. An electromagnetic flowmeter (100) for improving measurement during flow distortion of fluid in a flow channel (109), said electromagnetic flowmeter (100) comprising: Coil pairs (101, 103) include a top coil (C1) (101) and a bottom coil (C2) (103) exposed to current received from the system (200) to generate an electromagnetic field, wherein the current is based on a relationship between the distance of the electromagnetic flowmeter (100) from the flow distortion feature and the characteristic length of the electromagnetic flowmeter (100); and Electrode pairs (105, 107) are used to measure the electromotive force generated by the interaction of the electromagnetic field and the flow field in the fluid, wherein the signal caused by the electromotive force is generated based on the configuration of the currents in the coil pairs (C1, C2) (101, 103) by the interaction of the electromagnetic field and the flow field, for the system (200) to estimate the flow velocity of the fluid in the flow pipe (109).

Images