Method and device for evaluating off-line verification performance change of mass flow meter

Abstract

The invention provides an off-line verification performance change evaluation method and device for a mass flow meter, and relates to the technical field of product oil pipeline transportation. The method provided by the invention comprises the following steps: acquiring measurement data of a mass flowmeter, wherein the measurement data comprises a plurality of live zero point values measured by the mass flowmeter in a target time period; determining the flow change ratio corresponding to the preset working condition flow of the mass flow meter according to the measurement data of the mass flow meter; and determining a performance change evaluation result of the mass flow meter according to the flow change ratio corresponding to the preset working condition flow of the mass flow meter, wherein the performance change evaluation result comprises a metering indicating value deviation ratio and a metering indicating value deviation direction corresponding to the preset working condition flow of the mass flow meter. According to the method provided by the invention, the performance change of the mass flow meter which is qualified in offline verification and is completely installed can be accurately and rapidly evaluated, and the metering indicating value deviation ratio and the metering indicating value deviation direction of the mass flow meter under different working condition flows are determined.

Description

Technical Field

[0001] The invention relates to the technical field of refined oil pipeline transportation, and in particular to a method and a device for evaluating the off-line verification performance change of a mass flow meter. Background Art

[0002] Coriolis Mass Flow Meter is a direct mass flow measurement instrument that uses the principle that the Coriolis force generated by the fluid flowing in the measuring tube of the flow meter is proportional to the mass flow rate of the fluid flowing through. Coriolis Mass Flow Meter is widely used in pipeline, petroleum, chemical, food, smelting and other industries due to its many advantages such as direct mass measurement, high accuracy and low maintenance.

[0003] However, Coriolis mass flowmeters have high requirements for installation stress and other operating conditions. Installation stress will cause the measuring tube inside the mass flowmeter to deform, thus affecting the accuracy of its flow measurement. Since field conditions are more complex and changeable than laboratory conditions, and most of the mass flowmeters are installed by clamping in the laboratory offline calibration, which is different from the installation stress of the flange bolts on the pipeline, after the mass flowmeter with offline calibration is installed on the metering station, due to the different installation stress, different phase differences will be generated at zero flow, that is, the zero points under laboratory installation conditions and field installation conditions are different. This error can be eliminated by re-adjusting the zero point, but because the metering performance will change after the mass flowmeter is zeroed, it involves the problem of future refund and compensation of the metering-related parties, and does not meet the relevant requirements of industry standards.

[0004] Therefore, there is an urgent need for a method and device for evaluating the performance change of a mass flow meter during offline calibration, so as to evaluate the performance change of the mass flow meter and determine whether the mass flow meter needs to be processed, wherein the processing includes reinstallation or zeroing operation. Summary of the invention

[0005] The embodiment of the present invention provides a method and device for evaluating the performance change of a mass flow meter during offline calibration, which can evaluate the performance change of the mass flow meter and determine the size and direction of the indication deviation of the mass flow meter.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] In a first aspect, a method for evaluating the performance change of an offline calibration of a mass flowmeter is provided, the method comprising: obtaining measurement data of the mass flowmeter, the measurement data comprising a plurality of live zero values ​​measured by the mass flowmeter in a target time period; determining a flow change ratio corresponding to a preset operating flow rate of the mass flowmeter based on the measurement data of the mass flowmeter; determining a performance change evaluation result of the mass flowmeter based on the flow change ratio corresponding to the preset operating flow rate of the mass flowmeter, the performance change evaluation result comprising a metering indication deviation rate and a metering indication deviation direction corresponding to the preset operating flow rate of the mass flowmeter.

[0008] In a possible implementation of the first aspect, the flow change ratio corresponding to the preset operating condition flow of the mass flowmeter is determined based on the measurement data and performance parameters of the mass flowmeter, including: determining the arithmetic mean of multiple live zero point values ​​based on the measurement data of the mass flowmeter; determining the flow change ratio corresponding to the preset operating condition flow of the mass flowmeter based on the arithmetic mean of the multiple live zero point values.

[0009] In a possible implementation manner of the first aspect, a formula for determining the flow change ratio is:

[0010] R = 1 + livezero / q;

[0011] Wherein, livezero is the arithmetic mean of multiple live zero values, R is the flow change ratio corresponding to the preset operating flow of the mass flowmeter, and q is the preset operating flow.

[0012] In a possible implementation of the first aspect, a performance change evaluation result of the mass flowmeter is determined based on the flow change ratio corresponding to the preset operating condition flow of the mass flowmeter, including: determining the difference between the flow change ratio corresponding to the preset operating condition flow of the mass flowmeter and 1 as the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter; when the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter is greater than 0, determining that the metering indication deviation direction corresponding to the preset operating condition flow of the mass flowmeter is positive; when the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter is less than 0, determining that the metering indication deviation direction corresponding to the preset operating condition flow of the mass flowmeter is negative; when the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter is equal to 0, determining that the metering indication corresponding to the preset operating condition flow of the mass flowmeter is without deviation.

[0013] In a possible implementation of the first aspect, the above method also includes: when the metering indication deviation rate corresponding to the preset operating flow of the mass flow meter is greater than or equal to the alarm threshold, generating a prompt message, the prompt message is used to prompt the user to process the mass flow meter, wherein the processing includes reinstallation or zeroing operations.

[0014] In a possible implementation manner of the first aspect, the preset operating flow rate includes a minimum operating flow rate threshold or a maximum operating flow rate threshold of the mass flow meter.

[0015] In a possible implementation of the first aspect, measurement data of a mass flow meter is obtained, including: in response to an input data acquisition instruction, when the interior of the mass flow meter is filled with medium, closing valves arranged at the input and output ends of the mass flow meter; obtaining a measurement signal output by the mass flow meter in a target time period to obtain multiple active zero point values.

[0016] The beneficial effects of the present invention are as follows: the method provided by the embodiment of the present invention can achieve accurate and rapid evaluation of the performance changes of the mass flowmeter that has passed offline calibration and has been installed by acquiring the measurement data of the mass flowmeter, determine the metering indication deviation rate and metering indication deviation direction of the mass flowmeter under different operating flow rates, meet the evaluation needs of users in different usage scenarios, and have the advantage of high flexibility. It can also be understood that the purpose of the embodiment of the present invention is to provide a convenient method for evaluating the performance changes of the offline calibration of the Coriolis mass flowmeter, which uses the live zero point and operating flow rate of the mass flowmeter to determine the direction and size of the performance change, and can solve the problem of evaluating the metering performance changes of the mass flowmeter after the offline calibration is passed and installed in the on-site metering station.

[0017] In a second aspect, an embodiment of the present invention provides a device for evaluating the performance change of an offline calibration of a mass flowmeter, the device comprising: a data acquisition unit, used to acquire measurement data of the mass flowmeter, the measurement data comprising a plurality of live zero point values ​​measured by the mass flowmeter in a target time period; a ratio determination unit, used to determine the flow change ratio corresponding to a preset operating condition flow rate of the mass flowmeter based on the measurement data of the mass flowmeter; a performance evaluation unit, used to determine a performance change evaluation result of the mass flowmeter based on the flow change ratio corresponding to the preset operating condition flow rate of the mass flowmeter, the performance change evaluation result comprising a metering indication deviation rate and a metering indication deviation direction corresponding to the preset operating condition flow rate of the mass flowmeter, wherein the metering indication deviation direction comprises positive or negative.

[0018] In a possible implementation of the second aspect, the ratio determination unit is specifically used to: determine the arithmetic mean of multiple live zero point values ​​based on the measurement data of the mass flow meter; determine the flow change ratio corresponding to the preset operating flow of the mass flow meter based on the arithmetic mean of the multiple live zero point values.

[0019] In a possible implementation manner of the second aspect, a formula for determining the flow change ratio is:

[0020] R = 1 + livezero / q;

[0021] Wherein, livezero is the arithmetic mean of multiple live zero values, R is the flow change ratio corresponding to the preset operating flow of the mass flowmeter, and q is the preset operating flow.

[0022] According to a third aspect, an electronic device is provided, comprising a memory and one or more processors; the memory is coupled to the processor; wherein the memory stores computer program code, the computer program code comprises computer instructions, and when the computer instructions are executed by the processor, the electronic device executes a method as in any implementation of the first aspect.

[0023] According to a fourth aspect, a computer-readable storage medium is provided, comprising computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the method in any implementation of the first aspect.

[0024] According to a fifth aspect, a computer program product is provided. When the computer program product is run on a computer, the computer is enabled to execute the method in any implementation of the first aspect.

[0025] It can be understood that the beneficial effects that can be achieved by the device of the second aspect, the electronic device of the third aspect, the computer-readable storage medium of the fourth aspect, and the computer program product of the fifth aspect provided above can be referred to the beneficial effects in the first aspect and any possible design method thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the hardware structure of an electronic device shown in an embodiment of the present invention;

[0027] Figure 2 A flow chart of a method for evaluating the performance change of a mass flow meter offline verification according to an embodiment of the present invention;

[0028] Figure 3 A flow chart of another method for evaluating the performance change of a mass flow meter offline verification according to an embodiment of the present invention;

[0029] Figure 4 The figure is a schematic diagram of the hardware structure of an evaluation device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The technical solution in the embodiment of the present invention will be described below in conjunction with the accompanying drawings in the embodiment of the present invention. Among them, in the description of the present invention, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the present invention is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. And, in the description of the present invention, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items.

[0031] In addition, in order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", etc. are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first", "second", etc. do not limit the quantity and execution order, and the words "first", "second", etc. do not necessarily limit the difference.

[0032] Meanwhile, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way for easy understanding.

[0033] Coriolis Mass Flow Meter is a direct mass flow measurement instrument that uses the principle that the Coriolis force generated by the fluid flowing in the measuring tube of the flow meter is proportional to the mass flow rate of the fluid flowing through. Coriolis Mass Flow Meter is widely used in pipeline, petroleum, chemical, food, smelting and other industries due to its many advantages such as direct mass measurement, high accuracy and low maintenance.

[0034] The Coriolis mass flowmeter consists of a measuring tube, a sensor, and an exciter. The fluid flows in from the inlet of the flowmeter, passes through the U-shaped measuring tube, and flows out from the outlet of the flowmeter. At the same time, the measuring tube is in a "resonance" state under the excitation of the exciter. When there is no fluid flowing in the flowmeter, the vibration amplitude of each point on the measuring tube is the same, so the phase signals output by the two sides of the measuring tube are the same, and there is no phase difference; when there is fluid flowing in the measuring tube, the fluid is forced to accept the vertical movement of the flow tube when it flows into the flow tube. Due to the existence of the Coriolis force, in the half cycle of the downward vibration of one of the flow tubes, the fluid resists the downward movement of the measuring tube and exerts an upward force on it; conversely, the fluid flowing out of this flow tube exerts a downward force on the flow tube to resist the upward movement of the measuring tube, and reduces its vertical momentum, which causes the flow tube to twist. In the other half cycle of vibration, the flow tube vibrates upward, and the twisting direction is opposite; the measurement principle of the other measuring tube is the same, because the vibration direction is opposite, the twisting direction is also opposite. Therefore, when fluid flows, the measuring tube vibrates and twists at the same time. At this time, there will be a phase difference in the signals output from both sides of the measuring tube. This phase difference is proportional to the mass flow rate flowing through the flow meter.

[0035] However, Coriolis mass flowmeters have high requirements for installation stress and other operating conditions. Installation stress will cause the measuring tube inside the mass flowmeter to deform, thus affecting the accuracy of its flow measurement. Since field conditions are more complex and changeable than laboratory conditions, and most of the mass flowmeters are installed by clamping in the laboratory offline calibration, which is different from the installation stress of the flange bolts on the pipeline, after the mass flowmeter with offline calibration is installed on the metering station, due to the different installation stress, different phase differences will be generated at zero flow, that is, the zero points under laboratory installation conditions and field installation conditions are different. This error can be eliminated by re-adjusting the zero point, but because the metering performance will change after the mass flowmeter is zeroed, it involves the problem of future refund and compensation of the metering-related parties, and does not meet the relevant requirements of industry standards.

[0036] Therefore, there is an urgent need for a method and device for evaluating the performance change of a mass flow meter during offline calibration, so as to evaluate the performance change of the mass flow meter and determine whether the mass flow meter needs to be processed.

[0037] In view of this, an embodiment of the present invention provides a method for evaluating the performance change of an offline calibration of a mass flowmeter, the method comprising: obtaining measurement data of the mass flowmeter, the measurement data comprising multiple live zero point values ​​measured by the mass flowmeter in a target time period; determining a flow change ratio corresponding to a preset operating condition flow rate of the mass flowmeter according to the measurement data of the mass flowmeter; determining a performance change evaluation result of the mass flowmeter according to the flow change ratio corresponding to the preset operating condition flow rate of the mass flowmeter, the performance change evaluation result comprising a metering indication deviation rate and a metering indication deviation direction corresponding to the preset operating condition flow rate of the mass flowmeter.

[0038] The method provided by the embodiment of the present invention can achieve accurate and rapid evaluation of the performance changes of the mass flowmeter that has passed offline calibration and has been installed by acquiring the measurement data of the mass flowmeter, determine the metering indication deviation rate and metering indication deviation direction of the mass flowmeter under different operating flow rates, meet the evaluation needs of users in different usage scenarios, and have the advantage of high flexibility. It can also be understood that the purpose of the embodiment of the present invention is to provide a convenient method for evaluating the performance changes of the offline calibration of the Coriolis mass flowmeter, which uses the live zero point and operating flow rate of the mass flowmeter to determine the direction and size of the performance change, and can solve the problem of evaluating the metering performance changes of the mass flowmeter after it has passed offline calibration and is installed in the on-site metering station.

[0039] In some embodiments, the mass flow meter offline verification performance change evaluation method provided in the embodiments of the present invention can be performed by a mass flow meter offline verification performance change evaluation device 100 (hereinafter referred to as the evaluation device 100). As an example, the evaluation device 100 can be any electronic device 200 with data processing capabilities, such as a general-purpose computer, a personal computer, a laptop computer, a switch or a tablet computer, etc. The specific implementation method of the purchase list evaluation device 100 is not limited here.

[0040] Figure 1 The hardware structure diagram of the electronic device provided by the embodiment of the present invention is shown. The electronic device 200 includes a processor 210, a memory 220 and a communication interface 230.

[0041] The processor 210 may include one or more processing cores. The processor 210 uses various interfaces and lines to connect various parts in the electronic device 200, and executes various functions and processes data of the electronic device 200 by running or executing instructions, programs, code sets or instruction sets stored in the memory 220, and calling data stored in the memory 220. Optionally, the processor 210 can be implemented in at least one hardware form of a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA).

[0042] The memory 220 may include a random access memory (RAM) or a read-only memory (ROM). Optionally, the memory 220 includes a non-transitory computer-readable storage medium. The memory 220 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 220 may include a program storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a data acquisition function, a data processing function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.

[0043] The communication interface 230 is used to communicate with other devices, equipment or communication networks, such as data storage devices, image processing equipment or Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

[0044] In physical implementation, the above-mentioned components (such as processor 210, memory 220 and communication interface 230) can be components in the same device (such as a laptop). Alternatively, at least two of the components can be set in the same device, that is, as different components in one device, such as a deployment method similar to devices or components in a distributed system.

[0045] It is to be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 200. In other embodiments of the present invention, the electronic device 200 may include more or fewer components than those illustrated, or combine certain components, or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0046] A method for evaluating the performance change of a mass flow meter offline calibration provided by an embodiment of the present invention is described below in conjunction with the accompanying drawings.

[0047] Figure 2 A flow chart of a method for evaluating the performance change of a mass flow meter offline calibration provided by an embodiment of the present invention. Optionally, the method may be Figure 1 The electronic device 200 shown is executed, that is, the evaluation device 100 is executed. The method may include the following steps:

[0048] S1. Acquire measurement data of a mass flow meter, where the measurement data includes a plurality of active zero point values ​​measured by the mass flow meter in a target time period.

[0049] Among them, the mass flowmeter is a flow meter that calculates the flow rate by measuring the mass of the medium rather than the volume. In the working state of the mass flowmeter, when the flow of the measured medium is stationary, the output instantaneous flow signal of the measurement system is called the live zero signal. The live zero value of the mass flowmeter refers to the output instantaneous flow value of the measurement system when the flow of the measured medium is stationary in the working state.

[0050] In one example, the target time period is 300 seconds and the number of live zero values ​​is 300.

[0051] In a possible implementation, the above S1 specifically includes the following steps:

[0052] In response to the input data acquisition instruction, when the mass flow meter is filled with medium, the valves arranged at the input and output ends of the mass flow meter are closed; the measurement signal output by the mass flow meter in the target time period is acquired to obtain multiple active zero point values.

[0053] Specifically, the mass flow meter is arranged on the target pipeline, and the input end and output end of the mass flow meter are respectively provided with a first valve and a second valve. The evaluation device responds to the input data acquisition instruction, conducts the process flow, and makes the medium fill the target pipeline and the mass flow meter. After running for a preset time, the first valve and the second valve are closed to keep the medium flow still and fill the target pipeline. Under the condition of stable temperature and pressure, the instantaneous flow signal output by the mass flow meter in the target time period is obtained to obtain multiple live zero point values.

[0054] S2. Determine the flow rate change ratio corresponding to the preset working condition flow rate of the mass flow meter according to the measurement data of the mass flow meter.

[0055] Specifically, the preset operating flow rate includes a minimum operating flow rate threshold or a maximum operating flow rate threshold of the mass flow meter.

[0056] It should be understood that the preset operating flow rate can be any value within the rated operating flow rate range of the mass flow meter, for example, the daily operating flow rate of the mass flow meter. The embodiment of the present invention does not impose any particular limitation on the specific implementation method of the preset operating flow rate.

[0057] In one possible implementation, see Figure 3 The above S2 specifically includes the following steps:

[0058] S21. Determine the arithmetic mean of multiple active zero point values ​​based on the measurement data of the mass flow meter.

[0059] S22. Determine the flow change ratio corresponding to the preset operating condition flow of the mass flow meter according to the arithmetic mean of the multiple active zero point values.

[0060] In a possible implementation, the flow rate change ratio is determined by:

[0061] R = 1 + livezero / q;

[0062] Wherein, livezero is the arithmetic mean of multiple live zero values, R is the flow change ratio corresponding to the preset operating flow of the mass flowmeter, and q is the preset operating flow.

[0063] Specifically, the formula for determining the mass flow rate q flowing through the flow meter is:

[0064] q=3.6×flowcal×(Δt-kzero);

[0065] Wherein, flowcal is the flow calibration coefficient, the mass flow corresponding to a phase difference of 1 microsecond; unit: g / s / μs; △t: phase difference; unit: μs; kzero: stored zero value; unit: μs;

[0066] Under normal circumstances, when the medium is stationary, the reading of q of a qualified mass flowmeter after offline calibration fluctuates around 0, and △t≈kzero. The live zero of a mass flowmeter is the instantaneous flow rate displayed by the flowmeter when the medium is stationary.

[0067] The calculation formula of live zero point is:

[0068] livezero=3.6×flowcal×(△tlivezero-kzero);

[0069] △tlivezero=livezero / (3.6×flowcal)+kzero;

[0070] Among them, △tlivezero is the phase difference of the vibrating tube at the live zero point when the medium is stationary;

[0071] From the above formula, we can see that the phase difference of the live zero point is equivalent to adding livezero / flowcal on the basis of kzero.

[0072] When there is no obvious change in stress after the mass flowmeter is installed, the live zero point indication of the static medium still fluctuates around 0. When the installation stress changes significantly, the live zero point has a larger indication, which is equivalent to the phase difference of the mass flowmeter measuring tube increasing by livezero / (3.6×flowcal).

[0073] Flow rate Q when the mass flow meter is installed m2 The calculation formula is:

[0074] q2=3.6×flowcal×(△t+livezero / (3.6×flowcal)-kzero);

[0075] q2 / q=3.6×flowcal×(△t+livezero / (3.6×flowcal)-kzero) / ((3.6×flowcal)×

[0076] (△t-kzero))

[0077] =(△t-kzero+livezero / (3.6×flowcal)) / (△t-kzero)

[0078] =1+(livezero / (3.6×flowcal)) / (△t-kzero)

[0079] =1+livezero / ((3.6×flowcal)×(△t-kzero))

[0080] =1+livezero / q;

[0081] At this time, when q is the preset operating flow rate, the flow change ratio corresponding to the preset operating flow rate of the mass flowmeter can be obtained.

[0082] R=q2 / q=1+livezero / q.

[0083] S3. Determine a performance change evaluation result of the mass flow meter according to a flow change ratio corresponding to a preset operating condition flow of the mass flow meter.

[0084] Specifically, the performance change evaluation result includes the metering indication deviation rate and metering indication deviation direction corresponding to the preset operating condition flow of the mass flowmeter.

[0085] In some embodiments, see Figure 4 The above S3 specifically includes the following steps:

[0086] The difference between the flow change ratio corresponding to the preset operating condition flow of the mass flowmeter and 1 is determined as the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter; when the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter is greater than 0, the metering indication deviation direction corresponding to the preset operating condition flow of the mass flowmeter is determined to be positive; when the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter is less than 0, the metering indication deviation direction corresponding to the preset operating condition flow of the mass flowmeter is determined to be negative; when the metering indication deviation rate corresponding to the preset operating condition flow of the mass flowmeter is equal to 0, it is determined that the metering indication corresponding to the preset operating condition flow of the mass flowmeter has no deviation.

[0087] For example, the flow change ratio of the mass flow meter corresponding to flow A is 1.0012, the measurement indication deviation rate of the mass flow meter corresponding to flow A is 0.12%, and the measurement indication deviation direction of the mass flow meter corresponding to flow A is positive. The flow change ratio of the mass flow meter corresponding to flow B is 0.9993, the measurement indication deviation rate of the mass flow meter corresponding to flow A is -0.07%, and the measurement indication deviation direction of the mass flow meter corresponding to flow A is negative.

[0088] From S1-S3, it can be seen that the method provided by the embodiment of the present invention can achieve accurate and rapid evaluation of the performance changes of the mass flowmeter that has passed the offline calibration and has been installed by acquiring the measurement data of the mass flowmeter, determine the metering indication deviation rate and metering indication deviation direction of the mass flowmeter under different operating flow rates, meet the evaluation needs of users in different usage scenarios, and have the advantage of high flexibility. It can also be understood that the purpose of the embodiment of the present invention is to provide a convenient method for evaluating the performance changes of the offline calibration of the Coriolis mass flowmeter, which uses the live zero point and operating flow rate of the mass flowmeter to determine the direction and size of the performance change, and can solve the problem of evaluating the metering performance changes of the mass flowmeter after the offline calibration is qualified and installed in the on-site metering station.

[0089] In some embodiments, the method provided by the embodiment of the present invention further includes the following steps:

[0090] When the metering indication deviation rate corresponding to the preset operating flow of the mass flow meter is greater than or equal to the alarm threshold, a prompt message is generated, which is used to prompt the user to process the mass flow meter, wherein the processing includes reinstallation or zeroing operations.

[0091] From the above, it can be seen that the method provided by the present invention generates a prompt message when the measurement indication deviation rate is greater than or equal to the alarm threshold, thereby prompting the user to perform zero adjustment on the mass flow meter, which can effectively avoid the influence of the indication deviation of the mass flow meter on the user's use, thereby meeting the user's usage needs in different usage scenarios.

[0092] The above mainly introduces the scheme of the embodiment of the present invention from the perspective of the method. It can be understood that in order to realize the above functions, the evaluation device includes at least one of the hardware structure and software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments of the present invention.

[0093] The embodiment of the present invention can divide the evaluation device into functional units according to the above method example. For example, the evaluation device can be divided into functional units corresponding to various functions, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present invention is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0094] For example, Figure 4 The hardware structure diagram of an evaluation device provided by an embodiment of the present invention is shown. The evaluation device 100 includes: a data acquisition unit 410, which is used to acquire the measurement data of the mass flow meter, and the measurement data includes multiple active zero point values ​​measured by the mass flow meter in the target time period; a ratio determination unit 420, which is used to determine the flow change ratio corresponding to the preset working condition flow of the mass flow meter according to the measurement data of the mass flow meter; a performance evaluation unit 430, which is used to determine the performance change evaluation result of the mass flow meter according to the flow change ratio corresponding to the preset working condition flow of the mass flow meter, and the performance change evaluation result includes the metering indication deviation rate and metering indication deviation direction corresponding to the preset working condition flow of the mass flow meter.

[0095] Optionally, the ratio determination unit 420 is specifically used to: determine the arithmetic mean of multiple live zero point values ​​based on the measurement data of the mass flow meter; determine the flow change ratio corresponding to the preset operating condition flow of the mass flow meter based on the arithmetic mean of the multiple live zero point values.

[0096] Optionally, the flow rate change ratio is determined by:

[0097] R = 1 + livezero / q;

[0098] Wherein, livezero is the arithmetic mean of multiple live zero values, R is the flow change ratio corresponding to the preset operating flow of the mass flowmeter, and q is the preset operating flow.

[0099] It should be understood that the specific description of the above optional methods can refer to the above method embodiments, which will not be repeated here. In addition, the explanation of any evaluation device 100 provided above and the description of the beneficial effects can refer to the above corresponding method embodiments, which will not be repeated here.

[0100] The embodiment of the present invention further provides a computer-readable storage medium, in which at least one computer instruction is stored, and the at least one computer instruction is loaded and executed by a processor to implement the methods of the above embodiments. For the explanation of the relevant contents and the description of the beneficial effects in any of the above-mentioned computer-readable storage media, reference can be made to the above-mentioned corresponding embodiments, which will not be repeated here.

[0101] The embodiment of the present invention further provides a chip. The chip integrates a control circuit and one or more ports for implementing the functions of the above-mentioned evaluation device 100. Optionally, the functions supported by the chip can be referred to above and will not be described in detail here.

[0102] Those skilled in the art will appreciate that all or part of the steps of the above embodiments can be implemented by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The above-mentioned storage medium can be a read-only memory, a random access memory, etc. The above-mentioned processing unit or processor can be a central processing unit, a general-purpose processor, a specific circuit structure (application specific integrated circuit, ASIC), a microprocessor (digital signal processor, DSP), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.

[0103] The embodiment of the present invention also provides a computer program product including instructions, when the instructions are run on a computer, the computer executes any one of the methods in the above embodiments. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present invention is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., an SSD), etc.

[0104] It should be noted that the above-mentioned devices for storing computer instructions or computer programs provided in the embodiments of the present invention, such as but not limited to the above-mentioned memory, computer-readable storage medium and communication chip, etc., all have non-transitory. Those skilled in the art should be aware that in one or more of the above-mentioned examples, the functions described in the embodiments of the present invention can be implemented with hardware, software, firmware or any combination thereof. When implemented using software, these functions can be stored in a computer-readable storage medium or transmitted as one or more instructions or codes on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein the communication medium includes any medium that is convenient for transmitting a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0105] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for evaluating the performance change of a mass flowmeter offline verification, characterized in that: The method comprises: Acquiring measurement data of a mass flow meter, the measurement data comprising a plurality of active zero point values ​​measured by the mass flow meter in a target time period; Determining a flow rate change ratio corresponding to a preset working condition flow rate of the mass flow meter according to measurement data of the mass flow meter; The performance change evaluation result of the mass flowmeter is determined according to the flow change ratio corresponding to the preset operating condition flow of the mass flowmeter, and the performance change evaluation result includes the metering indication deviation rate and metering indication deviation direction corresponding to the preset operating condition flow of the mass flowmeter.

2. The method according to claim 1, characterized in that Determining the flow rate change ratio corresponding to the preset working condition flow rate of the mass flow meter according to the measurement data and performance parameters of the mass flow meter includes: Determining an arithmetic mean of the plurality of active zero point values ​​according to the measurement data of the mass flow meter; The flow rate change ratio corresponding to the preset operating condition flow rate of the mass flow meter is determined according to the arithmetic mean value of the multiple active zero point values.

3. The method according to claim 2, characterized in that The formula for determining the flow rate change ratio is: R = 1 + livezero / q; Wherein, livezero is the arithmetic mean of multiple live zero values, R is the flow change ratio corresponding to the preset operating flow of the mass flowmeter, and q is the preset operating flow.

4. The method according to claim 2, characterized in that: The step of determining the performance change evaluation result of the mass flow meter according to the flow change ratio corresponding to the preset working condition flow of the mass flow meter includes: Determine the difference between the flow rate change ratio corresponding to the preset working condition flow rate of the mass flow meter and 1 as the measurement indication deviation rate corresponding to the preset working condition flow rate of the mass flow meter; When the measurement indication deviation rate corresponding to the preset working condition flow rate of the mass flow meter is greater than 0, determining that the measurement indication deviation direction corresponding to the preset working condition flow rate of the mass flow meter is positive; When the measurement indication deviation rate corresponding to the preset working condition flow rate of the mass flow meter is less than 0, determining that the measurement indication deviation direction corresponding to the preset working condition flow rate of the mass flow meter is negative; When the measurement indication deviation rate corresponding to the preset operating condition flow rate of the mass flow meter is equal to 0, it is determined that the measurement indication corresponding to the preset operating condition flow rate of the mass flow meter has no deviation.

5. The method according to claim 4, characterized in that The method further comprises: When the metering indication deviation rate corresponding to the preset operating flow of the mass flow meter is greater than or equal to the alarm threshold, a prompt message is generated, and the prompt message is used to prompt the user to process the mass flow meter, wherein the processing includes reinstallation or zeroing operation.

6. The method according to claim 5, characterized in that The preset operating flow rate includes a minimum operating flow rate threshold or a maximum operating flow rate threshold of the mass flow meter.

7. The method according to claim 6, characterized in that The obtaining of the measurement data of the mass flow meter comprises: In response to an input data acquisition instruction, when the mass flow meter is filled with a medium, closing valves disposed at an input end and an output end of the mass flow meter; The measurement signal output by the mass flow meter in the target time period is obtained to obtain a plurality of live zero point values.

8. A mass flow meter off-line calibration performance change evaluation device, characterized in that: The device comprises: A data acquisition unit, used for acquiring measurement data of the mass flow meter, wherein the measurement data includes a plurality of active zero point values ​​measured by the mass flow meter in a target time period; A ratio determination unit, used to determine a flow rate change ratio corresponding to a preset working condition flow rate of the mass flow meter according to measurement data of the mass flow meter; A performance evaluation unit is used to determine a performance change evaluation result of the mass flow meter according to a flow change ratio corresponding to a preset operating condition flow rate of the mass flow meter, wherein the performance change evaluation result includes a metering indication deviation rate and a metering indication deviation direction corresponding to the preset operating condition flow rate of the mass flow meter.

9. The device according to claim 8, characterized in that The ratio determination unit is specifically used for: Determining an arithmetic mean of the plurality of active zero point values ​​according to the measurement data of the mass flow meter; The flow rate change ratio corresponding to the preset operating condition flow rate of the mass flow meter is determined according to the arithmetic mean value of the multiple active zero point values.

10. The device according to claim 9, characterized in that The formula for determining the flow rate change ratio is: R = 1 + livezero / q; Wherein, livezero is the arithmetic mean of multiple live zero values, R is the flow change ratio corresponding to the preset operating flow of the mass flowmeter, and q is the preset operating flow.

Images