CN117451145B - Electromagnetic flowmeter calibration method, system, medium and equipment - Google Patents
Electromagnetic flowmeter calibration method, system, medium and equipment Download PDFInfo
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Abstract
A calibration method, a system, a medium and equipment of an electromagnetic flowmeter relate to the technical field of electromagnetic flowmeter calibration. The method comprises the following steps: correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter; acquiring magnetic induction intensity of two electrodes and distance between the two electrodes, wherein the two electrodes are the two electrodes on the inner side of a sensor of an electromagnetic flowmeter; performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor; dry calibration is carried out on the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter, so that a second coefficient is obtained; and determining a target relation between the first coefficient and the second coefficient, and establishing a target database based on the target relation. By implementing the technical scheme provided by the application, the real-flow-free calibration correction of the electromagnetic flowmeter sensor can be realized by establishing the target database, so that the cost of real-flow calibration is reduced.
Description
Technical Field
The application relates to the technical field of electromagnetic flowmeter calibration, in particular to a method, a system, a medium and equipment for calibrating an electromagnetic flowmeter.
Background
The electromagnetic flowmeter is a flow instrument with higher measurement precision, has wide application and has wide market demands in the water industry. Electromagnetic flowmeters are commonly used in industrial and commercial applications to meter and control fluid flow. In order for the system to meet accurate metering and control requirements, the measurement results of the electromagnetic flowmeter must be consistent with the actual flow values. Parameters and a correction curve of the electromagnetic flowmeter can be adjusted through calibration, and the accuracy of the electromagnetic flowmeter and the overall measurement accuracy of the system are improved.
Because the electromagnetic flowmeter is also relatively high in manufacturing cost, the calibration cost is relatively large and is basically more than 5% of the total cost, particularly the large-caliber electromagnetic flowmeter, the calibration device occupies a large area, and the actual flow calibration can require preparation of a special fluid system, equipment and experimental conditions and more time and labor, so that the cost for calibrating the electromagnetic flowmeter is high and complex.
Disclosure of Invention
The application provides a calibration method, a system, a medium and equipment of an electromagnetic flowmeter, which can realize real-flow-free calibration correction of an electromagnetic flowmeter sensor by establishing a target database, and reduce the cost of real-flow calibration.
In a first aspect, the present application provides a method for calibrating an electromagnetic flowmeter, which adopts the following technical scheme:
Correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter;
acquiring magnetic induction intensity of two electrodes and a distance between the two electrodes, wherein the two electrodes are two electrodes on the inner side of a sensor for detecting an electromagnetic flowmeter;
Performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor;
Dry calibrating the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter to obtain a second coefficient;
And determining a target relation between the first coefficient and the second coefficient, and establishing a target database based on the target relation.
By adopting the technical scheme, the converter is corrected to obtain the corrected standard target converter, so that the target converter is more accurate to reduce errors, real-flow calibration and dry calibration are carried out based on the sensor and the target converter to respectively obtain the first coefficient and the second coefficient, the target relation between the first coefficient and the second coefficient is determined, and the target database is established, so that the support for the performance and the correction coefficient of the electromagnetic flowmeter can be provided, the electromagnetic flowmeter does not need to carry out real-flow calibration, corresponding correction calibration can be carried out according to the target database, and the cost for real-flow calibration is reduced.
Optionally, the correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter includes: acquiring a plurality of historical flow velocity values of the converter under a preset standard voltage value; obtaining a standard flow velocity value corresponding to the standard voltage value, and correcting the converter coefficient based on the standard flow velocity value and the historical flow velocity value to obtain a target converter coefficient; and taking the target converter coefficient as the current converter coefficient to obtain a standard target converter.
By adopting the technical scheme, the deviation or nonlinear relation of the converter coefficient can be determined by comparing the difference between the historical flow velocity value and the standard flow velocity value, and the converter coefficient can be corrected to eliminate or reduce the errors, so that the output result of the converter is more accurate and reliable.
Optionally, the acquiring the magnetic induction intensities of the inner two electrodes and the distance between the inner two electrodes, where the inner two electrodes are the inner two electrodes of the sensor of the electromagnetic flowmeter, includes: determining two inner electrodes of a sensor of the electromagnetic flowmeter; obtaining the average magnetic induction intensity between the two inner side electrodes as the magnetic induction intensity of the two inner side electrodes; the distance between the two electrodes on the inner side is measured based on an infrared distance measurement method.
By adopting the technical scheme, the flow rate of the fluid passing through the electromagnetic flowmeter can be estimated more accurately by acquiring the average magnetic induction intensity between the two electrodes at the inner side. The average magnetic induction comprehensively considers the magnetic induction of the two electrodes, provides a more reliable measurement result, measures the distance between the two electrodes at the inner side by using an infrared distance measuring method, can provide accurate distance information of the internal structure of the sensor, and is used for more accurate flow calculation.
Optionally, the performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor includes: acquiring flow velocity values corresponding to a plurality of preset calibration flow points; acquiring a voltage value output by each flow velocity value under the target converter; inputting each flow velocity value and the corresponding voltage value into a flow velocity calculation formula to obtain a first coefficient and a zero value of the sensor; the flow rate calculation formula is as follows: v=k 1Ed+V0, where V is the flow velocity value, K 1 is the first coefficient, E d is the voltage value, and V 0 is the zero point value.
By adopting the technical scheme, a series of correspondence between known flow rates and calibration points can be established by acquiring flow rate values corresponding to a plurality of preset calibration flow points, the calibration points are usually actual flow measurement under different flow rate conditions, a first coefficient and a zero point value can be obtained by substituting the known flow rate values and corresponding voltage values into a flow rate calculation formula, and the parameters reflect the characteristics and the offset of the sensor and can be used for correcting and correcting the measurement result of the sensor.
Optionally, the dry calibrating the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter to obtain a second coefficient includes: and inputting each flow velocity value, the magnetic induction intensity, the distance and a voltage value corresponding to the flow velocity value into the target converter to obtain a plurality of second coefficients.
By adopting the technical scheme, the electromagnetic flowmeter is dry calibrated based on the magnetic induction intensity, the distance and the target converter, and a plurality of second coefficients can be generated for calibration and correction measurement.
Optionally, the determining the target relationship between the first coefficient and the second coefficient, and building a target database based on the target relationship, includes: determining a target relationship of a first coefficient and a second coefficient based on the first coefficient and the second coefficient corresponding to each flow velocity value; and establishing a target database based on the target relation, wherein the target database has a corresponding first coefficient for each second coefficient.
By adopting the technical scheme, the target relationship between the first coefficient and the second coefficient is determined based on the first coefficient and the second coefficient corresponding to each flow velocity value. This target relationship may be a linear, nonlinear, or other form of functional relationship that describes the correlation between the first coefficient and the second coefficient. The object relation is determined in order to establish an accurate object database so as to calibrate and correct in practical application, so that calibration and correction of the electromagnetic flowmeter sensor are realized, and the cost of real-flow calibration is reduced.
Optionally, the determining, based on the first coefficient and the second coefficient corresponding to each flow velocity value, a target relationship between the first coefficient and the second coefficient includes: and establishing a normal distribution database based on the first coefficient and the second coefficient, and fitting data in the normal distribution database by using a statistical analysis method to obtain a target relationship between the first coefficient and the second coefficient.
By adopting the technical scheme, the data in the normal distribution database is fitted by using a statistical analysis method. By fitting the data, the optimal normal distribution curve can be found to describe the relation between the first coefficient and the second coefficient, so that a more standard target database is suggested, the actual flow-free calibration correction of the electromagnetic flowmeter sensor is realized, and the cost of actual flow calibration is reduced.
In a second aspect of the application there is provided a calibration system for an electromagnetic flow meter, the system comprising:
The converter correction module is used for correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter;
The sensor measurement module is used for acquiring the magnetic induction intensity of two electrodes and the distance between the two electrodes, wherein the two electrodes are the two electrodes on the inner side of a sensor for detecting the electromagnetic flowmeter;
The first coefficient determining module is used for carrying out real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor;
the second coefficient determining module is used for carrying out dry calibration on the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter to obtain a second coefficient;
and the target database establishing module is used for determining the target relation between the first coefficient and the second coefficient and establishing a target database based on the target relation.
In a third aspect the application provides a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-described method steps.
In a fourth aspect of the application there is provided an electronic device comprising: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.
In summary, one or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. The application corrects the converter to obtain a corrected standard target converter, so that the target converter is more accurate to reduce errors, real-flow calibration and dry calibration are carried out based on the sensor and the target converter to respectively obtain a first coefficient and a second coefficient, a target relation between the first coefficient and the second coefficient is determined, and a target database is established, so that the support for the performance and the correction coefficient of the electromagnetic flowmeter can be provided, the electromagnetic flowmeter does not need to carry out real-flow calibration, the corresponding correction calibration can be carried out according to the target database, and the cost for carrying out real-flow calibration is reduced;
2. The application determines a target relationship between a first coefficient and a second coefficient based on the first coefficient and the second coefficient corresponding to each flow rate value. This target relationship may be a linear, nonlinear, or other form of functional relationship that describes the correlation between the first coefficient and the second coefficient. The object relation is determined in order to establish an accurate object database so as to calibrate and correct in practical application, namely, the sensor of the electromagnetic flowmeter is corrected in a real-flow-free calibration manner, and the cost of the sensor of the electromagnetic flowmeter, which is required to be calibrated in real flow, is reduced.
Drawings
FIG. 1 is a schematic flow chart of a calibration method of an electromagnetic flowmeter according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a calibration system of an electromagnetic flowmeter according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Reference numerals illustrate: 1. a converter correction module; 2. a sensor measurement module; 3. a first coefficient determination module; 4. a second coefficient determination module; 5. a target database building module; 300. an electronic device; 301. a processor; 302. a communication bus; 303. a user interface; 304. a network interface; 305. a memory.
Detailed Description
In order that those skilled in the art will better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
In describing embodiments of the present application, words such as "for example" or "for example" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "such as" or "for example" in embodiments of the application should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "or" for example "is intended to present related concepts in a concrete fashion.
In the description of embodiments of the application, the term "plurality" means two or more. For example, a plurality of systems means two or more systems, and a plurality of screen terminals means two or more screen terminals. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating an indicated technical feature. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
The following description of the embodiments of the present application will be given in detail with reference to the accompanying drawings, and it is apparent that the embodiments described are only some, but not all embodiments of the present application.
In order to facilitate understanding of the method and system provided by the embodiments of the present application, a description of the background of the embodiments of the present application is provided before the description of the embodiments of the present application.
In view of the foregoing background description, those skilled in the art will appreciate that the problems associated with the prior art are solved and a complete description of the embodiments of the present application is provided below, with reference to the accompanying drawings in which embodiments of the present application are shown, wherein it is apparent that the embodiments described are only some, but not all, embodiments of the present application.
Referring to fig. 1, a flow chart of a calibration method of an electromagnetic flowmeter is specifically provided, and the method includes steps 10 to 50, where the steps are as follows:
step 10: and correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter.
In particular, there may be inherent systematic errors, such as offset, gain errors, or nonlinear characteristics, due to the converter itself. These errors result in differences between the measured result and the actual value, which need to be eliminated or reduced by correction, so the present application adjusts or calibrates by comparing known historical standard values or measured data with the actual output of the converter, and based on the comparison. Thereby realizing the correction of the converter and obtaining the standard target converter.
Based on the above embodiments, as an alternative embodiment, the correcting the converter according to the historical test voltage and flow rate to obtain the standard target converter may further include the following steps:
step 101: acquiring a plurality of historical flow velocity values of the converter under a preset standard voltage value;
In particular, a transducer refers to a transducer component in an electromagnetic flowmeter, also known as a signal transducer or transducer. An electromagnetic flowmeter is an instrument for measuring fluid flow, and is generally composed of a sensor and a transducer. The sensor portion is responsible for sensing the electromagnetic signal of the fluid passing through and converting it into a voltage or current signal. These signals are measured and sensed by electrodes inside the sensor to measure the magnetic field in the fluid. The converter part receives the voltage or current signal output by the sensor, amplifies, filters, linearizes and the like, and finally converts the processed signal into a standard output signal.
Further, in general, the converter of the electromagnetic flowmeter will convert the sensed voltage signal into a corresponding standard current signal or voltage signal for output. The converter usually has adjustable coefficients and parameters for calibrating and adjusting the relation between the output signal and the actual flow rate, and in the embodiment of the application, the converter of the electromagnetic flowmeter has a standard linear relation V-E between the input voltage and the output flow rate, wherein the voltage with the standard linear relation V-E of 1.67mV corresponds to a flow rate value of 10m/s, when the exciting current of the converter is 50mA, after the standard voltage value of 1.67mV is input, the converter converts the flow rate value into a flow rate with the flow rate value of 9.8m/s, and a plurality of historical flow rate values under the preset standard voltage value are obtained.
Step 102: obtaining a standard flow velocity value corresponding to the standard voltage value, and correcting the converter coefficient based on the standard flow velocity value and the historical flow velocity value to obtain a target converter coefficient;
Step 103: and taking the target converter coefficient as the current converter coefficient to obtain a standard target converter.
Specifically, the standard flow rate value corresponding to 1.67mV at the standard voltage value is 10m/s, and in actual situations, the flow rate value corresponding to the standard voltage value deviates due to the fluid property, the sensor structural design and the like, so as to obtain a plurality of flow rate values which are historic under the standard voltage value in actual situations, and the flow rate values may be 9.8 m/s, 9.9 m/s, 9.6 m/s and the like. And correcting the converter coefficient based on the standard flow velocity value and the historical flow velocity value to obtain a plurality of corresponding correction coefficients, and averaging the plurality of corresponding correction coefficients to obtain the target correction coefficient.
For example, assuming that the historical flow rate values are 9.8 m/s, 9.9 m/s, and 9.6 m/s under the actual condition, the first correction coefficient X 1 X9.8=10, the first correction coefficient X 2 X9.9=10, and the third correction coefficient X 3 X9.6=10, X 1、X2、X3 may be calculated. And the target correction coefficient X 0= （X1+X2+X3)/3, taking the target correction coefficient as the coefficient of the current converter, and correcting the converter into a standard converter to obtain the standard target converter. So that the target converter can output a flow rate value of 10m/s after inputting a standard voltage value of 1.67 mV.
Step 20: and acquiring the magnetic induction intensity of the two electrodes and the distance between the two electrodes, wherein the two electrodes are the two electrodes on the inner side of the sensor of the electromagnetic flowmeter.
Specifically, the positions of the two inner electrodes inside the sensor are determined according to a structural diagram or a technical document of the electromagnetic flowmeter. The inner electrode is typically referred to as an electrode for inducing a magnetic field near the edge of the fluid channel. With a suitable magnetic induction sensor or measuring device, it is placed between the inner electrodes and the average magnetic induction between the two electrodes is measured, which can be used as the magnetic induction of the inner electrodes. The leakage magnetic flux caused by the factors such as eddy current loss, hysteresis loss, air gap and the like can be removed, and an actual magnetic induction intensity value which can be directly calculated is obtained. And then an infrared distance measuring instrument or a sensor is used for measuring the distance between the inner side electrodes. The infrared distance measuring method may calculate the distance by emitting infrared light and measuring the time of the reflected light, or may measure the distance between the inner electrodes using other methods, which is not limited herein.
Step 30: and performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor.
Specifically, considering that welding can have a certain influence factor on zero point, after welding the shell, the sensor and the calibrated converter are matched for real-flow calibration. Thereby measuring the real flow calibration coefficient, i.e. the first coefficient, of the sensor.
Based on the above embodiment, as an optional embodiment, the step of performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain the first coefficient of the sensor may further include the following steps:
Step 301: acquiring flow velocity values corresponding to a plurality of preset calibration flow points;
Step 302: obtaining the voltage value output by each flow velocity value under the target converter;
Step 303: and inputting each flow velocity value and the corresponding voltage value into a flow velocity calculation formula to obtain a first coefficient and a zero point value of the sensor.
Specifically, in the embodiment of the present application, the plurality of preset calibration flow points are generally 5 flow points, such as 0.3m/s,0.5m/s,1m/s,2m/s,5m/s, and the like, and since the target converter has the standard linear relationship V-E between the input voltage and the output flow rate, the corresponding voltage value can be determined through each flow rate value. For example, a voltage value corresponding to a flow rate of 1m/s is 0.167mV, a voltage value corresponding to a flow rate of 5m/s is 0.835mV, etc. When the caliber of the sensor is fixed and constant source excitation is used, the flow rate flowing through the sensor can be calculated by a flow rate calculation formula, wherein the flow rate calculation formula is as follows: v=k 1Ed+V0, where V is a flow velocity value, K 1 is a first coefficient, and represents the magnitude of induced electromotive force when the flow velocity is 1m/s, E d is a voltage value, V 0 is a zero point value of the sensor, that is, represents the flow velocity reflected by the output of the sensing signal when the actual flow velocity is 0, and K 1 and V 0 are obtained by calibrating the actual flow, and are used as the slope and intercept of the function relation of the primary equation of the output of the sensor, and are given to the sensor to be calibrated.
Step 40: and dry calibration is carried out on the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter, so as to obtain a second coefficient.
In particular, V 0=V Static state +V Dress(s) +V Others can be approximated as a zero point of the sensor. Wherein V Static state is the polarization voltage difference after static water soaking, which is the main zero point value measured and collected. V Dress(s) is mainly zero point caused by mechanical assembly reasons such as coil assembly, wiring arrangement and the like. V Others is zero point caused by factors such as pipeline stray current interference, and the occupied ratio is relatively small. V Dress(s) and V Others are negligible in the embodiments of the application. The embodiment of the application mainly overcomes the V Static state zero point, adds an electrode zero point test fixture, measures the static zero point between two electrodes after water is introduced and is static for 5 minutes, and corrects the zero point at the interface of the converter. The magnetic induction intensity, the distance, the flow velocity values V and the voltage values E corresponding to the flow velocity values are input into the target converter, and a plurality of corresponding second coefficients k 2 can be obtained according to e=k 2 ×b×d×v.
Step 50: and determining a target relation between the first coefficient and the second coefficient, and establishing a target database based on the target relation.
Specifically, each flow velocity value corresponds to a plurality of first coefficients K 1 for real flow calibration and a plurality of second coefficients K 2 for dry calibration. I.e. each flow rate value corresponds to a first coefficient K 1 and a second coefficient K 2. A normal distribution database may be constructed based on the collected first coefficient and second coefficient data samples. In the database, the first coefficient is used as an independent variable, and the second coefficient is used as an independent variable. Fitting the data in the normal distribution database using a suitable statistical analysis method, such as least squares, nonlinear regression or other fitting algorithm, to obtain a target relationship between the first coefficient and the second coefficient. The fitting goodness index (such as R, R value) can be used for evaluating the fitting degree of the model, a higher R value indicates that the model fits the data better, and the target relationship between the first coefficient and the second coefficient is extracted according to the fitting result. The mathematical function may be a linear relationship, a nonlinear relationship, or other form, for example, the target relationship between the first coefficient and the second coefficient in the embodiment of the present application may be K 1= K2 x+b. And establishing a target database according to the target relation, wherein the target database comprises a plurality of first coefficients and second coefficients corresponding to the first coefficients. Since the first coefficients are actual flow calibrated sensor coefficients and the second coefficients are dry calibrated sensor coefficients, the corresponding first coefficients can be determined in the target database by the second coefficients. Therefore, the sensor of the electromagnetic flowmeter can be subjected to real-flow-free calibration correction, and the cost of real-flow calibration is reduced.
Referring to fig. 2, a schematic diagram of a calibration system of an electromagnetic flowmeter according to an embodiment of the present application may include: a converter correction module 1, a sensor measurement module 2, a first coefficient determination module 3, a second coefficient determination module 4, and a target database creation module 5, wherein:
The converter correction module 1 is used for correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter;
The sensor measurement module 2 is used for acquiring the magnetic induction intensity of two electrodes and the distance between the two electrodes, wherein the two electrodes are the two electrodes on the inner side of a sensor for detecting the electromagnetic flowmeter;
The first coefficient determining module 3 is used for performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor;
The second coefficient determining module 4 is configured to perform dry calibration on the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter, so as to obtain a second coefficient;
And the target database establishing module 5 is used for determining a target relation between the first coefficient and the second coefficient and establishing a target database based on the target relation.
It should be noted that: in the system provided in the above embodiment, when implementing the functions thereof, only the division of the above functional modules is used as an example, in practical application, the above functional allocation may be implemented by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to implement all or part of the functions described above. In addition, the system and method embodiments provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the system and method embodiments are detailed in the method embodiments, which are not repeated herein.
The embodiment of the application also provides a computer storage medium, which can store a plurality of instructions, the instructions are suitable for being loaded by a processor and executed by the processor, the specific execution process can be referred to the specific description of the above embodiment, and the description is omitted here.
Referring to fig. 3, the application also discloses an electronic device. Fig. 3 is a schematic structural diagram of an electronic device according to the disclosure. The electronic device 300 may include: at least one processor 301, at least one network interface 304, a user interface 303, a memory 305, at least one communication bus 302.
Wherein the communication bus 302 is used to enable connected communication between these components.
The user interface 303 may include a Display screen (Display), a Camera (Camera), and the optional user interface 303 may further include a standard wired interface, and a wireless interface.
The network interface 304 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
Wherein the processor 301 may include one or more processing cores. The processor 301 utilizes various interfaces and lines to connect various portions of the overall server, perform various functions of the server and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 305, and invoking data stored in the memory 305. Alternatively, the processor 301 may be implemented in at least one hardware form of digital signal Processing (DIGITAL SIGNAL Processing, DSP), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 301 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 301 and may be implemented by a single chip.
The Memory 305 may include a random access Memory (Random Access Memory, RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 305 includes a non-transitory computer readable medium (non-transitory computer-readable storage medium). Memory 305 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 305 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the above-described respective method embodiments, etc.; the storage data area may store data or the like involved in the above respective method embodiments. Memory 305 may also optionally be at least one storage device located remotely from the aforementioned processor 301. Referring to fig. 3, an operating system, a network communication module, a user interface module, and an application program of a calibration method of an electromagnetic flowmeter may be included in the memory 305 as a computer storage medium.
In the electronic device 300 shown in fig. 3, the user interface 303 is mainly used for providing an input interface for a user, and acquiring data input by the user; and the processor 301 may be used to invoke an application program in the memory 305 that stores a method of calibrating an electromagnetic flowmeter, which when executed by the one or more processors 301, causes the electronic device 300 to perform the method as described in one or more of the embodiments above. It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all of the preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, such as a division of units, merely a division of logic functions, and there may be additional divisions in actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some service interface, device or unit indirect coupling or communication connection, electrical or otherwise.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned memory includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a magnetic disk or an optical disk.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure.
This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
Claims (10)
1. A method of calibrating an electromagnetic flowmeter, the method comprising:
Correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter;
acquiring magnetic induction intensity of two electrodes and distance between the two electrodes, wherein the two electrodes are two electrodes on the inner side of a sensor of an electromagnetic flowmeter;
Performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor;
Dry calibrating the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter to obtain a second coefficient;
And determining a target relation between the first coefficient and the second coefficient, and establishing a target database based on the target relation.
2. The method of calibrating an electromagnetic flowmeter according to claim 1, wherein said correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter comprises:
Acquiring a plurality of historical flow velocity values of the converter under a preset standard voltage value;
Obtaining a standard flow velocity value corresponding to the standard voltage value, and correcting the converter coefficient based on the standard flow velocity value and the historical flow velocity value to obtain a target converter coefficient;
and taking the target converter coefficient as the current converter coefficient to obtain a standard target converter.
3. The method for calibrating an electromagnetic flowmeter according to claim 1, wherein the obtaining the magnetic induction intensities of the inner two electrodes and the distance between the inner two electrodes, the inner two electrodes being inner two electrodes of a sensor of the electromagnetic flowmeter, comprises:
Determining two inner electrodes of a sensor of the electromagnetic flowmeter;
Acquiring average magnetic induction intensity between the two inner side electrodes as the magnetic induction intensity of the two inner side electrodes;
The distance between the two electrodes on the inner side is measured based on an infrared distance measurement method.
4. The method for calibrating an electromagnetic flowmeter according to claim 1, wherein said performing real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain the first coefficient of the sensor comprises:
Acquiring flow velocity values corresponding to a plurality of preset calibration flow points;
acquiring a voltage value output by each flow velocity value under the target converter;
Inputting each flow velocity value and the corresponding voltage value into a flow velocity calculation formula to obtain a first coefficient and a zero value of the sensor;
The flow rate calculation formula is as follows: v=k 1Ed+V0, where V is the flow velocity value, K 1 is the first coefficient, E d is the voltage value, and V 0 is the zero point value.
5. The method according to claim 4, wherein dry calibrating the electromagnetic flowmeter based on the magnetic induction intensity, the distance, and the target converter to obtain the second coefficient comprises:
and inputting each flow velocity value, the magnetic induction intensity, the distance and a voltage value corresponding to the flow velocity value into the target converter to obtain a plurality of second coefficients.
6. The method of calibrating an electromagnetic flowmeter according to claim 1, wherein said determining a target relationship of the first coefficient and the second coefficient, and building a target database based on the target relationship, comprises:
determining a target relationship of a first coefficient and a second coefficient based on the first coefficient and the second coefficient corresponding to each flow velocity value;
and establishing a target database based on the target relation, wherein the target database has a corresponding first coefficient for each second coefficient.
7. The method according to claim 6, wherein determining the target relationship between the first coefficient and the second coefficient based on the first coefficient and the second coefficient corresponding to each flow velocity value comprises:
and establishing a normal distribution database based on the first coefficient and the second coefficient, and fitting data in the normal distribution database by using a statistical analysis method to obtain a target relationship between the first coefficient and the second coefficient.
8. A calibration system for an electromagnetic flowmeter, the system comprising:
the converter correction module (1) is used for correcting the converter according to the historical test voltage and flow rate to obtain a standard target converter;
The sensor measurement module (2) is used for acquiring the magnetic induction intensity of two electrodes and the distance between the two electrodes, wherein the two electrodes are the two electrodes on the inner side of a sensor for detecting the electromagnetic flowmeter;
The first coefficient determining module (3) is used for carrying out real-flow calibration on the electromagnetic flowmeter based on the sensor and the target converter to obtain a first coefficient of the sensor;
the second coefficient determining module (4) is used for performing dry calibration on the electromagnetic flowmeter based on the magnetic induction intensity, the distance and the target converter to obtain a second coefficient;
and the target database establishing module (5) is used for determining a target relation between the first coefficient and the second coefficient and establishing a target database based on the target relation.
9. A computer readable storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the method of any one of claims 1 to 7.
10. An electronic device comprising a processor, a memory and a transceiver, the memory configured to store instructions, the transceiver configured to communicate with other devices, the processor configured to execute the instructions stored in the memory, to cause the electronic device to perform the method of any one of claims 1-7.
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| CN101750136A (en) * | 2009-12-31 | 2010-06-23 | 北京航空航天大学 | Dry calibration method of electromagnetic flow meter based on intraductal magnetic field simulation numerical calculation |
| JP2016090524A (en) * | 2014-11-11 | 2016-05-23 | アズビル株式会社 | Calibration method and calibration system of electromagnetic flowmeter |
| EP4092392A1 (en) * | 2021-05-21 | 2022-11-23 | Ningbo Water Meter (Group) Co., Ltd. | Electromagnetic water meter converter and method for calibrating electromagnetic water meter converter |
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| CN101750136A (en) * | 2009-12-31 | 2010-06-23 | 北京航空航天大学 | Dry calibration method of electromagnetic flow meter based on intraductal magnetic field simulation numerical calculation |
| JP2016090524A (en) * | 2014-11-11 | 2016-05-23 | アズビル株式会社 | Calibration method and calibration system of electromagnetic flowmeter |
| EP4092392A1 (en) * | 2021-05-21 | 2022-11-23 | Ningbo Water Meter (Group) Co., Ltd. | Electromagnetic water meter converter and method for calibrating electromagnetic water meter converter |
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