CN117824791A - Zero flow value correction method and device of flowmeter, electronic equipment and storage medium - Google Patents
Zero flow value correction method and device of flowmeter, electronic equipment and storage medium Download PDFInfo
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Abstract
The application discloses a zero flow value correction method and device of a flowmeter, electronic equipment and a storage medium. The zero flow value correction method of the flowmeter comprises the following steps: acquiring the temperature of the flowmeter, acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model, and compensating the zero value of the flowmeter according to the zero compensation value to obtain compensated data. According to the zero flow value correction method of the flowmeter, the temperature of the flowmeter is obtained, the corresponding zero compensation value is obtained according to the temperature of the flowmeter and the temperature-zero mathematical model established in advance, the zero value of the flowmeter is compensated according to the zero compensation value, compensated data are obtained, the probability of occurrence of large and continuous change of the zero value is reduced, the accuracy and stability of data output by the flowmeter are improved, and the occurrence probability of zero flow of the flowmeter is reduced.
Description
Technical Field
The application relates to the technical field of electromagnetic metering, in particular to a zero flow value correction method and device of a flowmeter, electronic equipment and a storage medium.
Background
Electromagnetic metering technology is gaining more attention in the field of flow metering detection due to its metering characteristics of high reliability, high stability, wide range ratio, low pressure loss, etc. However, in the actual application scene (environmental temperature change) of the electromagnetic flowmeter, the problem that the meter has a character in the zero flow condition can occur, and the problem that the meter cannot accurately meter is caused by the zero flow character.
The statements are to be understood as merely provide background information related to the present application and may not necessarily constitute prior art.
Disclosure of Invention
The purpose of the application is to provide a zero flow value correction method and device of a flowmeter, electronic equipment and a storage medium. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of the embodiments of the present application, there is provided a zero flow value correction method of a flowmeter, including:
acquiring the temperature of the flowmeter;
acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model;
and compensating the zero point value of the flowmeter according to the zero point compensation value to obtain compensated data.
In some embodiments of the present application, the establishing of the temperature-zero mathematical model includes:
under the condition that the flow is in a full water state, performing zero flow test at each preset temperature;
and establishing a temperature-zero mathematical model according to each preset temperature and the corresponding zero flow test value.
In some embodiments of the present application, the correction method further comprises:
filtering the compensated data to obtain filtered data;
and performing small flow excision on the filtered data.
In some embodiments of the present application, the filtering the compensated data includes:
carrying out mean filtering on the compensated data to obtain mean filtered data;
and carrying out Kalman filtering on the data after the mean value filtering to obtain data after the Kalman filtering.
In some embodiments of the present application, the performing the mean filtering on the compensated data to obtain mean filtered data includes:
filling the compensated data into a preset array in real time according to the acquisition time sequence, and placing the data in the preset array according to the first-in first-out principle;
and carrying out mean value calculation on the data in the preset array in real time, and taking the obtained mean value calculation result as data after mean value filtering.
In some embodiments of the present application, the performing kalman filtering on the data after the mean filtering to obtain data after the kalman filtering includes:
acquiring the slope of the flow change according to the data after the mean value filtering;
selecting a noise covariance for the Kalman filter according to the slope to obtain an improved Kalman filter;
and inputting the data after the mean value filtration into the improved Kalman filter for processing to obtain the data after the Kalman filtration.
In some embodiments of the present application, the performing small-flow excision on the filtered data includes:
if the filtered data is smaller than a preset zero flow threshold, the output flow value is 0;
and if the filtered data is greater than or equal to the preset zero flow threshold, outputting a flow value which is the preset zero flow threshold.
According to another aspect of the embodiments of the present application, there is provided a zero flow value correction device of a flow meter, including:
the flowmeter temperature acquisition module is used for acquiring the temperature of the flowmeter;
the zero compensation value acquisition module is used for acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model;
and the compensation module is used for compensating the zero point value of the flowmeter according to the zero point compensation value to obtain compensated data.
According to another aspect of the embodiments of the present application, there is provided an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the zero flow value correction method of the flowmeter of any of the embodiments of the present application.
According to another aspect of an embodiment of the present application, there is provided a computer-readable storage medium having stored thereon a computer program that is executed by a processor to implement the zero flow value correction method of the flowmeter of any of the embodiments of the present application.
One of the technical solutions provided in one aspect of the embodiments of the present application may include the following beneficial effects:
according to the zero flow value correction method of the flowmeter, the temperature of the flowmeter is obtained, the corresponding zero compensation value is obtained according to the temperature of the flowmeter and the temperature-zero mathematical model established in advance, the zero value of the flowmeter is compensated according to the zero compensation value, compensated data are obtained, the probability of occurrence of large and continuous change of the zero value is reduced, the accuracy and stability of data output by the flowmeter are improved, and the occurrence probability of zero flow of the flowmeter is reduced.
The foregoing description is only an overview of the embodiments of the present application, and may be implemented in accordance with the content of the specification in order to make the technical means of the embodiments of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the embodiments of the present application more comprehensible, the following detailed description of the present application.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a flow chart of a zero flow value correction method of a flow meter according to one embodiment of the present application.
Fig. 2 shows a flow chart of a zero flow value correction method of a flowmeter according to another embodiment of the present application.
Fig. 3 shows a graph of zero as a function of temperature in one embodiment of the present application.
FIG. 4 shows a graph of temperature over time in one embodiment of the present application.
Fig. 5 shows a graph of zero as a function of temperature in one embodiment of the present application.
FIG. 6 shows a graph of temperature over time in one embodiment of the present application.
Fig. 7 is a block diagram showing the configuration of a zero flow value correction device of the flow meter according to the embodiment of the present application.
Fig. 8 shows a block diagram of an electronic device according to an embodiment of the present application.
FIG. 9 illustrates a computer-readable storage medium schematic of one embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In the electromagnetic flowmeter of the related art, the signal-to-noise ratio is generally improved, and the small flow cutting threshold is improved so as to reduce the possibility of zero flow character shifting. High-precision operational amplification or increased exciting current is needed to improve the signal-to-noise ratio, which leads to the rise of cost and power consumption; the use of a higher low flow cut-off threshold results in a higher pickup flow, which in turn results in a meter that cannot achieve a high turndown ratio.
Aiming at the problems in the related art, the embodiment of the application provides a zero flow value correction method of a flowmeter, which comprises the following steps: acquiring the temperature of the flowmeter, acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model, and compensating the zero value of the flowmeter according to the zero compensation value to obtain compensated data. According to the method, the probability of large and continuous change of the zero value is reduced, the accuracy and stability of data output by the flowmeter are improved, and the probability of zero-flow character passing of the flowmeter is reduced.
Referring to fig. 1, an embodiment of the present application provides a zero flow value correction method of a flowmeter, including steps S10 to S30:
s10, acquiring the temperature of the flowmeter.
Specifically, the flowmeter may be an electromagnetic flowmeter, and a temperature sensor may be added to a circuit board of the electromagnetic flowmeter to detect the temperature of the circuit board as the temperature of the electromagnetic flowmeter.
S20, acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model.
Illustratively, the establishing of the temperature-zero mathematical model may include: under the condition that the flowmeter is in a full water state, carrying out zero flow test at each preset temperature; and establishing a temperature-zero mathematical model according to each preset temperature and the corresponding zero flow test value.
After the electromagnetic flowmeter is assembled, the pipe section is in a full water state, and zero flow tests at different temperatures are carried out. In the zero flow test, the temperature fluctuation at the time of temperature stabilization needs to be less than 2 ℃. In the test process, the flow/temperature data of the surface end is monitored in a serial port printing mode.
After zero flow tests are carried out on a plurality of electromagnetic flowmeters at different temperatures, a temperature-zero mathematical model is established according to the actually measured temperature and flow change trend.
The following mathematical model can be established through actually measuring the change trend of temperature and flow:
wherein T is 1 ,T 2 ,T 3 ,T 4 .. it is different temperature ranges; a, a 1 ,a 2 ,a 3 ...b 1 ,b 2 ,b 3 ...c 1 ,c 2 ,c 3 .. constant terms of corresponding polynomials for different temperature ranges; n, m, l. are power exponentials of corresponding polynomials for different temperature ranges; v 0 Is an inherent zero point of electromagnetic flow; v is zero point supplementAnd (5) compensating. After the mathematical model is obtained, the model is written into the MCU, and zero points can be compensated through temperature. The MCU is a micro control unit.
In some embodiments, the temperature characteristic and the zero point relation are obtained through the temperature drift characteristic of the circuit board of the electromagnetic flowmeter, and a mathematical model is built based on the temperature characteristic and the zero point relation, so that the use of a temperature sensor can be reduced, the cost is reduced, and the power consumption is reduced.
And S30, compensating the zero point value of the flowmeter according to the zero point compensation value to obtain compensated data.
Illustratively, the zero value is compensated according to a temperature-zero mathematical model in the MCU, and the compensated flow data is shown as the figure, and the electromagnetic flowmeter is not affected by the temperature after the temperature-zero mathematical model is applied.
Specifically, the circuit board temperature detected in real time according to the temperature sensor can compensate zero points in real time, so that the circuit board temperature does not have large and continuous changes.
Referring to fig. 2, in some embodiments, the correction method may further include steps S40 to S50:
and S40, filtering the compensated data to obtain filtered data.
Illustratively, filtering the compensated data to obtain filtered data may include: carrying out mean filtering on the compensated data to obtain mean filtered data; and carrying out Kalman filtering on the data after the mean value filtering to obtain data after the Kalman filtering.
Illustratively, the average filtering is performed on the compensated data to obtain average filtered data, including:
filling the compensated data into a preset array in real time according to the acquisition time sequence, and placing the data in the preset array according to the first-in first-out principle;
and carrying out mean value calculation on the data in the preset array in real time, and taking the obtained mean value calculation result as data after mean value filtering.
Illustratively, performing kalman filtering on the data after the mean value filtering to obtain data after the kalman filtering may include: acquiring the slope of the flow change according to the data after the mean value filtering; selecting a noise covariance for the Kalman filter according to the slope to obtain an improved Kalman filter; and inputting the data after the mean value filtration into the improved Kalman filter for processing to obtain the data after the Kalman filtration.
Illustratively, the flow data after zero compensation is filtered in a manner including mean value filtering and improved fast kalman filtering.
The method comprises the specific steps of: an array x [ t ] is set, t is more than or equal to 2. And filling the acquired flow data into an array x [ t ] in real time according to the time sequence, and placing the data by the x [ t ] array according to the first-in first-out principle. And carrying out average value calculation on the array in real time, wherein the calculated average value is used as an input for improving the fast Kalman filtering.
The obtained value is subjected to improved fast Kalman filtering, and the specific steps comprise: and acquiring a slope R of the flow change, selecting a corresponding noise covariance Q in the Kalman filter by judging the range of the slope R, and changing the noise covariance Q can adjust the filtering depth of the Kalman filter.
S50, performing small flow excision on the filtered data.
Illustratively, performing the small-flow excision on the filtered data may include: if the filtered data is smaller than a preset zero flow threshold, the output flow value is 0; and if the filtered data is greater than or equal to the preset zero flow threshold, outputting a flow value which is the preset zero flow threshold.
Illustratively, after filtering, the traffic data is already nearly stable. Based on this, a zero flow threshold THR is set, if the flow data F cor If the flow rate is smaller than THR, the flow rate displayed by the electromagnetic flowmeter is 0m 3 /h; if the flow data F cor THR is more than or equal to the flow displayed by the electromagnetic flowmeter is F cor m 3 And/h. The preset zero flow threshold value can be set according to the requirements of practical application。
After the compensated zero data is filtered and smoothed, the fluctuation of the zero data is controlled within a certain range, and then zero small flow excision is carried out on the filtered value, so that the purpose of zero flow character shift can be achieved.
Referring to fig. 7, another embodiment of the present application provides a zero flow value correction device of a flow meter, including:
the flowmeter temperature acquisition module is used for acquiring the temperature of the flowmeter;
the zero compensation value acquisition module is used for acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model;
and the compensation module is used for compensating the zero point value of the flowmeter according to the zero point compensation value to obtain compensated data.
In some embodiments, the establishment of the temperature-zero mathematical model may include: under the condition that the flow is in a full water state, performing zero flow test at each preset temperature; and establishing a temperature-zero mathematical model according to each preset temperature and the corresponding zero flow test value.
In some embodiments, the correction device may further include:
the filtering module is used for filtering the compensated data to obtain filtered data;
and the small flow cutting module is used for cutting the small flow of the filtered data.
In some embodiments, the filtering module may include:
the mean value filtering unit is used for carrying out mean value filtering on the compensated data to obtain mean value filtered data;
and the Kalman filtering unit is used for carrying out Kalman filtering on the data subjected to the mean value filtering to obtain data subjected to the Kalman filtering.
In some embodiments, the mean filtering unit is further to: filling the compensated data into a preset array in real time according to the acquisition time sequence, and placing the data in the preset array according to the first-in first-out principle; and carrying out mean value calculation on the data in the preset array in real time, and taking the obtained mean value calculation result as data after mean value filtering.
In some embodiments, the kalman filter unit is further to: acquiring the slope of the flow change according to the data after the mean value filtering; selecting a noise covariance for the Kalman filter according to the slope to obtain an improved Kalman filter; and inputting the data after the mean value filtration into the improved Kalman filter for processing to obtain the data after the Kalman filtration.
In some embodiments, the miniflow excision module is further to: if the filtered data is smaller than a preset zero flow threshold, the output flow value is 0; and if the filtered data is greater than or equal to the preset zero flow threshold, outputting a flow value which is the preset zero flow threshold.
According to the zero flow value correction device of the flowmeter, the temperature of the flowmeter is obtained, the corresponding zero compensation value is obtained according to the temperature of the flowmeter and a temperature-zero mathematical model established in advance, the zero value of the flowmeter is compensated according to the zero compensation value, and compensated data are obtained. According to the method, the probability of large and continuous change of the zero value is reduced, the accuracy and stability of data output by the flowmeter are improved, and the probability of zero-flow character passing of the flowmeter is reduced.
Another embodiment of the present application provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement a method according to any one of the embodiments.
Referring to fig. 8, the electronic device 10 may include: processor 100, memory 101, bus 102 and communication interface 103, processor 100, communication interface 103 and memory 101 being connected by bus 102; the memory 101 has stored therein a computer program executable on the processor 100, which when executed by the processor 100 performs the method provided by any of the embodiments described herein.
The memory 101 may include a high-speed random access memory (RAM: random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the device network element and the at least one other network element is achieved through at least one communication interface 103 (which may be wired or wireless), the internet, a wide area network, a local network, a metropolitan area network, etc. may be used.
Bus 102 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. The memory 101 is configured to store a program, and the processor 100 executes the program after receiving an execution instruction, and the method disclosed in any of the foregoing embodiments of the present application may be applied to the processor 100 or implemented by the processor 100.
The processor 100 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 100 or by instructions in the form of software. The processor 100 may be a general-purpose processor, and may include a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), and the like; but may also be a Digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and, in combination with its hardware, performs the steps of the method described above.
The electronic device provided by the embodiment of the application and the method provided by the embodiment of the application are the same in the invention conception, and have the same beneficial effects as the method adopted, operated or realized by the electronic device.
Another embodiment of the present application provides a computer readable storage medium having stored thereon a computer program for execution by a processor to implement a method as described in any one of the above embodiments. Referring to fig. 9, a computer readable storage medium is shown as an optical disc 20 having a computer program (i.e., a program product) stored thereon, which, when executed by a processor, performs the method provided by any of the embodiments described above.
It should be noted that examples of the computer readable storage medium may also include, but are not limited to, a phase change memory (PRAM), a Static Random Access Memory (SRAM), a Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a flash memory, or other optical or magnetic storage medium, which will not be described in detail herein.
The computer readable storage medium provided by the above-described embodiments of the present application has the same advantageous effects as the method adopted, operated or implemented by the application program stored therein, for the same inventive concept as the method provided by the embodiments of the present application.
It should be noted that:
the term "module" is not intended to be limited to a particular physical form. Depending on the particular application, modules may be implemented as hardware, firmware, software, and/or combinations thereof. Furthermore, different modules may share common components or even be implemented by the same components. There may or may not be clear boundaries between different modules.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose devices may also be used with the examples herein. The required structure for the construction of such devices is apparent from the description above. In addition, the present application is not directed to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present application as described herein, and the above description of specific languages is provided for disclosure of preferred embodiments of the present application.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
The foregoing examples merely represent embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. A zero flow value correction method of a flow meter, comprising:
acquiring the temperature of the flowmeter;
acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model;
and compensating the zero point value of the flowmeter according to the zero point compensation value to obtain compensated data.
2. The method of claim 1, wherein the establishing of the temperature-zero mathematical model comprises:
under the condition that the flow is in a full water state, performing zero flow test at each preset temperature;
and establishing a temperature-zero mathematical model according to each preset temperature and the corresponding zero flow test value.
3. The method of claim 1, wherein the correction method further comprises:
filtering the compensated data to obtain filtered data;
and performing small flow excision on the filtered data.
4. A method according to claim 3, wherein said filtering said compensated data comprises:
carrying out mean filtering on the compensated data to obtain mean filtered data;
and carrying out Kalman filtering on the data after the mean value filtering to obtain data after the Kalman filtering.
5. The method of claim 4, wherein the average filtering the compensated data to obtain average filtered data comprises:
filling the compensated data into a preset array in real time according to the acquisition time sequence, and placing the data in the preset array according to the first-in first-out principle;
and carrying out mean value calculation on the data in the preset array in real time, and taking the obtained mean value calculation result as data after mean value filtering.
6. The method according to claim 4 or 5, wherein said subjecting said averaged filtered data to a kalman filter results in kalman filtered data, comprising:
acquiring the slope of the flow change according to the data after the mean value filtering;
selecting a noise covariance for the Kalman filter according to the slope to obtain an improved Kalman filter;
and inputting the data after the mean value filtration into the improved Kalman filter for processing to obtain the data after the Kalman filtration.
7. A method according to claim 3, wherein said performing a small stream cut on said filtered data comprises:
if the filtered data is smaller than a preset zero flow threshold, the output flow value is 0;
and if the filtered data is greater than or equal to the preset zero flow threshold, outputting a flow value which is the preset zero flow threshold.
8. A zero-point flow rate value correction device for a flowmeter, comprising:
the flowmeter temperature acquisition module is used for acquiring the temperature of the flowmeter;
the zero compensation value acquisition module is used for acquiring a corresponding zero compensation value according to the temperature of the flowmeter and a pre-established temperature-zero mathematical model;
and the compensation module is used for compensating the zero point value of the flowmeter according to the zero point compensation value to obtain compensated data.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the zero flow value correction method of the flow meter of any of claims 1-7.
10. A computer-readable storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement the zero flow value correction method of the flow meter of any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311315386.0A CN117824791A (en) | 2023-10-10 | 2023-10-10 | Zero flow value correction method and device of flowmeter, electronic equipment and storage medium |
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| CN202311315386.0A CN117824791A (en) | 2023-10-10 | 2023-10-10 | Zero flow value correction method and device of flowmeter, electronic equipment and storage medium |
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