Oil flow meter calibration method, device, computer equipment and storage medium

Abstract

The present disclosure provides a calibration method, device, computer equipment and storage medium for an oil flow meter, which belongs to the field of metrological calibration. The calibration method includes: receiving a first calibration parameter set sent by an oil station field equipment, the parameters in the first calibration parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into a standard volume tube, and the standard volume tube is used to calibrate whether the measurement result of the oil flow meter is accurate; if the first calibration parameter set meets the calibration conditions, a calibration instruction is sent to the oil station field equipment; receiving a second calibration parameter set sent by the oil station field equipment according to the calibration instruction, the first calibration parameter set being a true subset of the second calibration parameter set; determining the calibration result of the oil flow meter according to the second calibration parameter set; and sending the calibration result to the oil station field equipment. The present disclosure can greatly improve the implementation efficiency and reduce the implementation cost.

Description

Technical Field

[0001] The present disclosure relates to the field of metrology verification, and in particular to a verification method, device, computer equipment and storage medium for an oil flow meter. Background Art

[0002] With the construction and extension of oil pipelines, the risk of oil loss during pipeline transportation is getting higher and higher. The measurement of oil products is related to the vital interests of all parties involved in the transaction, so the accuracy and reliability of oil product measurement are increasingly valued by all parties involved in the transaction.

[0003] Oil flowmeter is a precision instrument used to measure oil flow, and is widely used in the measurement of various oil products and low-corrosive media. In the relevant technology, the standard volume tube is first calibrated at the oil transfer station, and then the oil flowmeter is calibrated using the standard volume tube at the oil transfer station to transfer the precise value to the oil flowmeter to ensure the accuracy and reliability of oil measurement.

[0004] Currently, the calibration of oil flow meters requires staff to arrive at the oil transfer station to control the calibration process of the oil flow meters, which is inefficient and costly. Summary of the invention

[0005] The embodiments of the present disclosure provide a calibration method, device, server, terminal and storage medium for an oil flow meter, wherein a staff can remotely control the calibration process of the oil flow meter, and the calibration of the oil flow meter does not require the staff to arrive at the oil transportation station, which can greatly improve the efficiency and reduce the cost. The technical solution is as follows:

[0006] In a first aspect, an embodiment of the present disclosure provides a method for calibrating an oil flow meter, the method comprising:

[0007] Receiving a first verification parameter set sent by the oil station equipment, wherein the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate;

[0008] If the first verification parameter set meets the verification condition, sending a verification instruction to the oil transfer station equipment;

[0009] receiving a second verification parameter set sent by the oil transfer station equipment according to the verification instruction, wherein the first verification parameter set is a proper subset of the second verification parameter set;

[0010] Determining a verification result of the oil flow meter according to the second verification parameter set;

[0011] The verification result is sent to the oil transfer station equipment.

[0012] Optionally, the verification conditions include:

[0013] The difference between the inlet pressure and the outlet pressure of the standard volume tube is less than or equal to the pressure difference threshold;

[0014] The outlet pressure of the standard volume tube is greater than or equal to the pressure threshold;

[0015] The difference between the outlet temperature of the standard volume tube and the temperature in the oil flow meter is within a temperature range.

[0016] Optionally, determining the verification result of the oil flow meter according to the second verification parameter set includes:

[0017] Using the parameters in the second verification parameter set to correct the standard volume of the standard volume tube, and determining the actual volume of the standard volume tube when the oil flows through it;

[0018] According to the type of the oil product, a flow measurement value of the oil product flowing through the oil product flow meter is obtained from the actual volume;

[0019] According to the type of the oil product, a calibration coefficient of the oil product flow meter and the repeatability of the calibration coefficient are obtained from the flow meter value;

[0020] The calibration result of the oil flow meter is determined according to the calibration coefficient of the oil flow meter and the repeatability of the calibration coefficient.

[0021] Optionally, determining the calibration result of the oil flow meter according to the calibration coefficient of the oil flow meter and the repeatability of the calibration coefficient includes:

[0022] If the verification coefficient is within the coefficient range and the repeatability of the verification coefficient is less than or equal to the repeatability threshold, the verification is determined to be qualified;

[0023] If the verification coefficient is outside the coefficient range, or the repeatability of the verification coefficient is greater than the repeatability threshold, the verification is determined to be unqualified.

[0024] Optionally, the verification method further comprises:

[0025] If the first verification parameter set does not meet the verification conditions, a check instruction is sent to the oil station equipment, wherein the check instruction is used to instruct the staff to check whether the oil flowing out of the oil flow meter has all flowed into the standard volume tube.

[0026] In a second aspect, an embodiment of the present disclosure provides a method for calibrating an oil flow meter, the method comprising:

[0027] Sending a first verification parameter set to the measurement center device, wherein the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate;

[0028] If a verification instruction sent by the metrology center device is received, a second verification parameter set is sent to the metrology center device, wherein the verification instruction is sent by the metrology center device when the first verification parameter set meets the verification condition, and the first verification parameter set is a proper subset of the second verification parameter set;

[0029] A verification result sent by the metrology center device is received, where the verification result is determined by the metrology center device according to the second verification parameter set.

[0030] Optionally, the verification method further comprises:

[0031] Receiving an inspection instruction sent by the measurement center equipment;

[0032] A notice is issued to check whether all the oil flowing out of the oil flow meter flows into the standard volume tube.

[0033] In a third aspect, an embodiment of the present disclosure provides a calibration device for an oil flow meter, the calibration device comprising:

[0034] A first receiving module, used for receiving a first verification parameter set sent by the oil station equipment, wherein the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate;

[0035] An acquisition module, configured to send a verification instruction to the oil transfer station equipment when the first verification parameter set meets the verification condition;

[0036] A second receiving module, used for receiving a second verification parameter set sent by the oil station equipment according to the verification instruction, wherein the first verification parameter set is a proper subset of the second verification parameter set;

[0037] A calculation module, used for determining a verification result of the oil flow meter according to the second verification parameter set;

[0038] The sending module is used to send the verification result to the oil transfer station equipment.

[0039] In a fourth aspect, an embodiment of the present disclosure provides a calibration device for an oil flow meter, the calibration device comprising:

[0040] A first sending module is used to send a first verification parameter set to the measurement center device, wherein the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate;

[0041] a second sending module, configured to send a second verification parameter set to the metrology center device when receiving a verification instruction sent by the metrology center device, wherein the verification instruction is sent by the metrology center device when the first verification parameter set meets the verification condition, and the first verification parameter set is a proper subset of the second verification parameter set;

[0042] The receiving module is used to receive the verification result sent by the measurement center device, where the verification result is determined by the measurement center device according to the second verification parameter set.

[0043] In a fifth aspect, an embodiment of the present disclosure provides a computer device, the computer device comprising:

[0044] processor;

[0045] a memory configured to store executable instructions for the processor;

[0046] The processor is configured to execute the method provided in the first aspect, or to execute the method provided in the second aspect.

[0047] In a sixth aspect, an embodiment of the present disclosure provides a computer-readable storage medium. When instructions in the computer-readable storage medium are executed by a processor of a computer device, the computer device is enabled to execute the method provided in the first aspect, or to execute the method provided in the second aspect.

[0048] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0049] The first calibration parameter set is sent to the metering center equipment through the oil station equipment. The parameters in the first calibration parameter set are used to determine whether the oil flowing out of the oil flow meter flows into the standard volume tube. The standard volume tube is used to calibrate whether the measurement result of the oil flow meter is accurate. The metering center equipment can determine whether the calibration conditions are met according to the first calibration parameter set, and control the calibration process of the oil flow meter. When the first calibration parameter meets the calibration conditions, the metering center equipment sends a calibration instruction to the oil station equipment, so that the oil station equipment sends the second calibration parameter set to the metering center equipment according to the calibration instruction. The first calibration parameter set is a true subset of the second calibration parameter set. The metering center equipment can determine the calibration result of the oil flow meter according to the second calibration parameter set and send it to the oil station equipment to complete the calibration of the oil flow meter. During the entire calibration process, the oil station equipment only needs to collect the calibration parameters and send them to the metering center equipment. The calibration of the oil flow meter can be realized without the staff arriving at the oil station equipment, which is efficient and cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0051] Figure 1 is a schematic diagram of the oil flow meter calibration process provided by the embodiment of the present disclosure;

[0052] Figure 2 is a flow chart of a method for calibrating an oil flow meter provided in an embodiment of the present disclosure;

[0053] Figure 3 is a flow chart of a method for calibrating an oil flow meter provided in an embodiment of the present disclosure;

[0054] Figure 4 It is a flow chart of an oil flow meter calibration method provided by an embodiment of the present disclosure;

[0055] Figure 5 It is a structural schematic diagram of a calibration device for an oil flow meter provided in an embodiment of the present disclosure;

[0056] Figure 6 It is a structural schematic diagram of a calibration device for an oil flow meter provided in an embodiment of the present disclosure;

[0057] Figure 7 It is a structural diagram of a computer device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0059] Oil flow meter is a precision instrument used to measure liquid flow and is widely used in the measurement of various oil products and low-corrosive media. Figure 1 A schematic diagram of the oil flow meter calibration process provided by the embodiment of the present disclosure. Figure 1 When the oil flow meter 10 is calibrated, the inlet of the standard volume tube 20 is connected to the outlet of the oil flow meter 10, and all the oil flowing out of the oil flow meter 10 flows into the standard volume tube 20. The standard volume tube 20 is a container with a known volume and a displacer 30 inside. The displacer 30 is a spherical or cylindrical object driven by a liquid and moves from the inlet of the standard volume tube 20 to the outlet of the standard volume tube 20. The oil flowing into the standard volume tube 20 drives the displacer 30 to move from the inlet of the standard volume tube 20 to the outlet of the standard volume tube 20. At this time, the volume of oil flowing into the standard volume tube 20 is equal to the actual volume of the standard volume tube. If the volume of oil flowing out of the oil flow meter 10 is equal to the volume of oil flowing into the standard volume tube 20, the volume of oil flowing out of the oil flow meter 10 is also equal to the actual volume of the standard volume tube 20. In practical applications, the actual volume of the standard volume tube, that is, the volume of oil flowing out of the oil flowmeter, can be determined based on the known volume of the standard volume tube (called the standard volume); then the oil volume determined based on the volume of the standard volume tube can be compared with the oil volume measured by the oil flowmeter to determine whether the measurement of the oil flowmeter is accurate and to achieve the calibration of the oil flowmeter. Specifically, if the oil volume determined based on the volume of the standard volume tube is the same as the oil volume measured by the oil flowmeter, the calibration of the oil flowmeter is qualified; if the oil volume determined based on the volume of the standard volume tube is different from the oil volume measured by the oil flowmeter, the calibration of the oil flowmeter is unqualified.

[0060] In the related art, workers arrive at the oil transfer station and calibrate the oil flow meter using a standard volume tube, which is inefficient and costly.

[0061] The embodiment of the present disclosure provides a calibration method for an oil flow meter, which can be applied to measurement center equipment. Figure 2 This is a flow chart of a method for calibrating an oil flow meter provided in an embodiment of the present disclosure. Figure 2 , the verification method includes:

[0062] Step 101: Receive a first verification parameter set sent by oil transfer station equipment.

[0063] In the disclosed embodiment, the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate.

[0064] In actual applications, if the volume of oil flowing through the oil flowmeter is equal to the volume of oil flowing through the standard volume tube, the volume of oil flowing through the oil flowmeter is determined based on the volume of the standard volume tube, and can be compared with the volume of oil measured by the oil flowmeter. If the volume of oil flowing through the oil flowmeter is not equal to the volume of oil flowing through the standard volume tube, such as part of the oil flowing out of the oil flowmeter flows into other pipelines, or part of the oil flowing into the standard volume tube comes from other pipelines, then the volume of oil flowing through the oil flowmeter determined based on the volume of the standard volume tube does not conform to the actual situation, and the result of comparison with the volume of oil measured by the oil flowmeter is inaccurate.

[0065] The disclosed embodiment first receives a first calibration parameter set, and can determine whether the volume of oil flowing out of the oil flowmeter is the same as the volume of oil flowing into the standard volume tube based on the first calibration parameter set. If they are determined to be the same, the volume of oil flowing through the oil flowmeter can be determined based on the volume of the standard volume tube, and compared with the volume of oil measured by the oil flowmeter to determine whether the measurement of the oil flowmeter is accurate. If they are determined to be different, such as part of the oil flowing out of the oil flowmeter flows into other pipelines, or part of the oil flowing into the standard volume tube comes from other pipelines, then stop determining the volume of oil flowing through the oil flowmeter based on the volume of the standard volume tube, avoid using an oil volume that does not conform to the actual situation to calibrate the oil volume measured by the oil flowmeter, ensure the accuracy of the oil flowmeter calibration, and effectively reduce the amount of calculation and avoid waste of resources.

[0066] Exemplarily, the first calibration parameter set includes multiple ones of the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure inside the oil flow meter, and the temperature inside the oil flow meter.

[0067] Step 102: If the first set of verification parameters meets the verification conditions, a verification instruction is sent to the oil transfer station equipment.

[0068] In the embodiment of the present disclosure, the calibration condition is met when the parameters in the first calibration parameter set indicate that the volume of oil flowing out of the oil flowmeter is equal to the volume of oil flowing into the standard volume tube. At this time, there is no problem in calibrating the oil flowmeter with the standard volume tube, and the calibration result of the oil flowmeter can be determined based on the second calibration parameter set.

[0069] The disclosed embodiment determines whether the verification conditions are met based on the first verification parameter set, and does not require complex calculations, which is low-cost. After determining that the verification conditions are met, the volume of oil flowing through the oil flowmeter is determined based on the volume of the standard volume tube. At this time, the volume of oil flowing through the oil flowmeter is equal to the volume of oil flowing through the standard volume tube. The determined oil volume conforms to the actual situation, and the oil volume measured by the oil flowmeter can be accurately calibrated. If it is determined that the verification conditions are not met, it is also possible to avoid complex calculations to determine the volume of oil flowing through the oil flowmeter, thereby avoiding wasting computing resources.

[0070] Step 103: receiving a second verification parameter set sent by the oil transportation station equipment according to the verification instruction.

[0071] In the disclosed embodiment, the first verification parameter set is a proper subset of the second verification parameter set.

[0072] After determining that the calibration conditions are met, the metering center equipment sends a calibration instruction to the oil station equipment. After receiving the calibration instruction, the oil station equipment sends a second set of calibration parameters. This can effectively avoid the transmission of problematic calibration parameters between the oil station equipment and the metering center equipment, saving transmission resources.

[0073] Exemplarily, the second calibration parameter set includes the standard volume of the standard volume tube, the inner diameter of the standard volume tube, the wall thickness of the standard volume tube, the elastic modulus of the standard volume tube, the expansion coefficient of the standard volume tube, the density of the original liquid in the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, the expansion coefficient of the original liquid in the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure inside the oil flow meter, and the temperature inside the oil flow meter.

[0074] Step 104: Determine the calibration result of the oil flow meter according to the second calibration parameter set.

[0075] In the disclosed embodiment, when the oil flows through the standard volume tube, the temperature difference between the oil and the standard volume tube and the pressure exerted by the oil on the standard volume tube will cause the standard volume tube to deform, resulting in the volume of the standard volume tube not necessarily being the standard volume (i.e., the known volume of the standard volume tube). Therefore, the measurement result of the oil flow meter cannot be directly compared with the standard volume of the standard volume tube.

[0076] The embodiment of the present disclosure determines the calibration result of the oil flow meter according to the second calibration parameter set. The influence of the oil on the standard volume tube can be determined by the second calibration parameter set to obtain the actual volume of the standard volume tube, which is then compared with the measurement result of the oil flow meter to obtain an accurate calibration result.

[0077] Step 105: Send the verification result to the oil transfer station equipment.

[0078] In the disclosed embodiment, the oil station equipment only needs to collect and receive data during the entire process, with small changes and easy implementation.

[0079] The disclosed embodiment sends the first calibration parameter set to the metering center equipment through the oil station equipment. The parameters in the first calibration parameter set are used to determine whether the oil flowing out of the oil flow meter flows into the standard volume tube. The standard volume tube is used to calibrate whether the measurement result of the oil flow meter is accurate. The metering center equipment can determine whether the calibration conditions are met based on the first calibration parameter set, and control the calibration process of the oil flow meter. If it is determined that the calibration conditions are met, a calibration instruction can be sent to the oil station equipment, and a second calibration parameter set can be obtained from the oil station equipment. The first calibration parameter set is a true subset of the second calibration parameter set. The metering center equipment can determine the calibration result of the oil flow meter based on the second calibration parameter set and send it to the oil station equipment to complete the calibration of the oil flow meter. During the entire calibration process, the oil station equipment only needs to collect the calibration parameters and send them to the metering center equipment. The calibration of the oil flow meter can be achieved without the staff arriving at the oil station equipment, which is efficient and cost-effective.

[0080] The disclosed embodiment provides a method for calibrating an oil flow meter, which can be applied to equipment in oil transportation stations. Figure 3 This is a flow chart of a method for calibrating an oil flow meter provided in an embodiment of the present disclosure. Figure 3 , the verification method includes:

[0081] Step 201: Send a first verification parameter set to a metrology center device.

[0082] In the disclosed embodiment, the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate.

[0083] The metering center device receives the first set of verification parameters, and can determine whether the verification conditions are met based on the first set of verification parameters, and send corresponding instructions to the oil terminal equipment. The oil terminal equipment receives the instructions sent by the metering center device, and then proceeds with the subsequent process. In this way, sending the first set of verification parameters to the metering center device to determine whether the verification conditions are met can effectively avoid transmitting a large number of problematic verification parameters and save transmission resources.

[0084] Exemplarily, the first verification parameter set may be the same as that in step 101 and will not be described in detail here.

[0085] Step 202: If a calibration instruction sent by the metrology center device is received, a second calibration parameter set is sent to the metrology center device.

[0086] In the disclosed embodiment, the calibration instruction is sent by the metering center device when the first calibration parameter set meets the calibration conditions. If the metering center device determines that the calibration conditions are met, it means that the oil flowing out of the oil flow meter is exactly the same as the oil flowing into the standard volume tube. The volume of the oil flowing through the oil flow meter can be determined based on the volume of the standard volume tube to measure whether the oil volume measured by the oil flow meter is accurate. At this time, the second calibration parameter set is sent to the metering center device. The metering center device can determine the calibration result of the oil flow meter based on the second calibration parameter set, and the calibration result is accurate.

[0087] Exemplarily, the second verification parameter set may be the same as that in step 103 and will not be described in detail here.

[0088] Step 203: Receive the calibration result sent by the measurement center equipment.

[0089] In the disclosed embodiment, the verification result is determined by the measurement center device according to the second verification parameter set. The oil station equipment only needs to collect and send and receive data during the whole process, and the modification range is small, which is very convenient to implement.

[0090] The disclosed embodiment first sends a first set of calibration parameters to the metering center device, and the metering center device can determine whether the calibration conditions are met based on the first set of calibration parameters to control the calibration process of the oil flow meter. If the metering center device determines that the calibration conditions are met, it receives the calibration instruction sent by the metering center device and sends a second set of calibration parameters to the metering center device, and the metering center device can determine the calibration result of the oil flow meter based on the second set of calibration parameters. The entire calibration process is basically completed by the metering center device, and the oil terminal equipment only needs to collect the calibration parameters and send them to the metering center equipment. The calibration of the oil flow meter can be realized without the staff arriving at the oil terminal equipment, which has high efficiency and low cost.

[0091] The embodiment of the present disclosure provides a method for calibrating an oil flow meter. Figure 4 This is a flow chart of an oil flow meter calibration method provided by an embodiment of the present disclosure. Figure 4 , the verification method includes:

[0092] Step 301: The oil transfer station equipment sends a first verification parameter set to the metering center equipment.

[0093] In the embodiment of the present disclosure, the first calibration parameter set includes the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the outlet temperature of the standard volume tube, and the temperature inside the oil flow meter.

[0094] Step 302: If the first calibration parameter set meets the calibration conditions, the metering center equipment sends a calibration instruction to the oil station equipment.

[0095] Accordingly, the oil transfer station equipment receives the verification instruction.

[0096] Optionally, the verification conditions include:

[0097] The difference between the inlet pressure and the outlet pressure of the standard volume tube is less than or equal to the pressure difference threshold;

[0098] The outlet pressure of the standard volume tube is greater than or equal to the pressure threshold;

[0099] The difference between the outlet temperature of the standard volume tube and the temperature inside the oil flow meter is within the temperature range.

[0100] The difference between the inlet pressure and the outlet pressure of the standard volume tube is less than or equal to the pressure difference threshold, indicating that there is no leakage of oil in the process of passing through the standard volume tube; the outlet pressure of the standard volume tube is greater than or equal to the pressure threshold, indicating that the oil is flowing in the standard volume tube; the difference between the outlet temperature of the standard volume tube and the temperature in the oil flow meter is within the temperature range, indicating that the oil can only pass through the pipeline between the oil flow meter and the standard volume tube, that is, the oil flowing out of the oil flow meter all flows into the standard volume tube, and the oil flowing into the standard volume tube all comes from the oil flow meter. The disclosed embodiment determines whether the three set conditions are met at the same time to accurately determine whether the volume of oil passing through the oil flow meter is equal to the volume of oil passing through the standard volume tube, ensures that the oil volume determined based on the volume of the standard volume tube is in line with the actual situation, and can accurately calibrate the oil volume measured by the oil flow meter.

[0101] Exemplarily, the pressure difference threshold is 0.05 MPa, the pressure threshold is 0.112 MPa, and the temperature range is -1°C to 1°C.

[0102] Step 303: The oil transfer station equipment sends a second set of verification parameters to the metering center equipment according to the received verification instruction.

[0103] Accordingly, the metrology center device receives the second verification parameter set.

[0104] In the disclosed embodiment, when the oil product is refined oil, the second calibration parameter set includes the standard volume of the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inner diameter of the standard volume tube, the elastic modulus of the standard volume tube, the wall thickness of the standard volume tube, the expansion coefficient of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, and the density of the original liquid in the standard volume tube.

[0105] When the oil product is crude oil, the second calibration parameter set includes the standard volume of the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inner diameter of the standard volume tube, the elastic modulus of the standard volume tube, the wall thickness of the standard volume tube, the expansion coefficient of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, the pressure in the oil flowmeter, the expansion coefficient of the original liquid in the standard volume tube, and the temperature in the oil flowmeter.

[0106] Among them, the standard volume of the standard volume tube, the inner diameter of the standard volume tube, the elastic modulus of the standard volume tube, the wall thickness of the standard volume tube, the expansion coefficient of the standard volume tube, the density of the original liquid in the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, and the expansion coefficient of the original liquid in the standard volume tube can be input into the oil station equipment before calibration. The inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter, and the temperature in the oil flow meter can be collected by sensors.

[0107] Step 304: The metering center device determines the calibration result of the oil flow meter according to the received second calibration parameter set.

[0108] Optionally, step 304 includes:

[0109] The first step is to correct the standard volume of the standard volume tube using the parameters in the second verification parameter set to determine the actual volume of the standard volume tube when the oil passes through it;

[0110] The second step is to obtain the flow measurement value of the oil product through the oil flow meter from the actual volume according to the type of oil product;

[0111] The third step is to obtain the calibration coefficient of the oil flow meter and the repeatability of the calibration coefficient from the flow measurement value according to the type of oil.

[0112] In the disclosed embodiment, when the oil passes through the standard volume tube, the temperature difference between the oil and the standard volume tube and the pressure exerted by the oil on the standard volume tube will cause the standard volume tube to deform, resulting in the volume of the standard volume tube not necessarily being the standard volume. The disclosed embodiment corrects the standard volume of the standard volume tube, thereby accurately determining the volume of the oil passing through the oil flow meter based on the volume of the standard volume tube, thereby obtaining an accurate calibration result.

[0113] The types of oil products include crude oil and refined oil. Crude oil is measured according to the volume of the oil product, and refined oil is measured according to the quality of the oil product. The disclosed embodiment calculates the flow measurement value of the oil flow meter passing through the oil product according to the type of the oil product, and obtains the calibration coefficient of the oil flow meter and the repeatability of the calibration coefficient from the flow measurement value according to the type of the oil product, so as to determine the calibration results for the measurement standards of different types of oil products. Among them, the flow measurement value is a value obtained by the standard volume of the standard volume tube and compared with the measurement value of the oil flow meter. When the type of the oil product is crude oil, the flow measurement value is the volume of the oil product passing through the oil flow meter; when the type of the oil product is refined oil, the flow measurement value is the quality of the oil product passing through the oil flow meter.

[0114] Exemplarily, the first step includes:

[0115] The actual volume V of the standard volume tube when the oil passes through it is calculated using the following formula (1): s :

[0116] V s =V 20 ×(1+C psp )×(1+C tsp ); (1)

[0117] Among them, V 20 is the standard volume of the standard volume tube, in L; C psp is the pressure correction value of the standard volume tube, C psp =p s ×(D / E s / e);p s is the average pressure of the standard volume tube, p s =(p sin +p sout ) / 2; p sin is the inlet pressure of the standard volume tube, in MPa; p sout is the outlet pressure of the standard volume tube, in MPa; D is the inner diameter of the standard volume tube, in mm; E s is the elastic modulus of the standard volume tube, in Pa; e is the wall thickness of the standard volume tube, in mm; C tsp is the temperature correction value of the standard volume tube, C tsp =β s (t s -20); β s is the expansion coefficient of the standard volume tube, in °C -1 ;t s is the average temperature of the standard volume tube, t s =(t sin +t sout ) / 2; t sinis the inlet temperature of the standard volume tube, in °C; t sou is the outlet temperature of the standard volume tube, in °C.

[0118] Exemplarily, if the oil product is refined oil, the second step includes:

[0119] The following formula (2) is used to calculate the flow rate Q of the oil product through the oil flow meter: s :

[0120] Q s =V s ×ρ; (2)

[0121] Among them, V s is the actual volume of the standard volume tube when the oil passes through it; ρ is the density of the original liquid in the standard volume tube, in kg / m 3 .

[0122] If the oil product is crude oil, the second step includes:

[0123] The following formula (3) is used to calculate the flow measurement value Q of the oil product through the oil product flow meter: s :

[0124] Q s =V s ×(1+C plp )×(1+C tlp ); (3)

[0125] Among them, V s C is the actual volume of the oil when it passes through the standard volume tube; plp is the pressure correction value of the oil flow meter, C plp =F×(p s -p m ); F is the compressibility coefficient of the original liquid in the standard volume tube, in Pa -1 ;p s is the average pressure of the standard volume tube, p s =(p sin +p sout ) / 2; p sin is the inlet pressure of the standard volume tube, in MPa; p sout is the outlet pressure of the standard volume tube, in MPa; p m is the pressure in the oil flow meter, in MPa; C tlp is the temperature correction value of the oil flow meter, C tlp =β m ×(t m -t s );β m is the expansion coefficient of the original liquid in the standard volume tube, in °C-1 ;t m is the temperature inside the oil flow meter, in °C; t s is the average temperature of the standard volume tube, t s =(t sin +t sout ) / 2; t sin is the inlet temperature of the standard volume tube, in °C; t sou is the outlet temperature of the standard volume tube, in °C.

[0126] Exemplarily, the third step includes:

[0127] The verification coefficient MF of the oil flow meter is calculated using the following formula (4):

[0128] MF=Q s / (N / K); (4)

[0129] Among them, Q s is the flow measurement value of the oil product through the oil product flow meter; N is the number of pulses measured by the oil product flow meter; K is the number of pulses obtained by the oil product flow meter when measuring 1 unit of oil product;

[0130] The repeatability δ of the calibration coefficient of the oil flow meter is calculated using the following formula (5):

[0131]

[0132] Among them, MF max is the maximum value of the verification coefficient of the oil flow meter, MF min is the minimum value of the verification coefficient of the oil flow meter. is the average value of the calibration coefficient of the oil flow meter, and dn is the range coefficient.

[0133] In the embodiment of the present disclosure, if the oil product is crude oil, K=10 (1 / L); if the oil product is refined oil, K=100 (1 / Kg). The range coefficient can be obtained using the following Table 1:

[0134] Table 1 Range coefficient table

[0135]

[0136] Optionally, step 304 further includes:

[0137] If the verification coefficient is within the coefficient range and the repeatability of the verification coefficient is less than or equal to the repeatability threshold, the verification is determined to be qualified;

[0138] If the verification coefficient is outside the coefficient range, or the repeatability of the verification coefficient is greater than the repeatability threshold, the verification is determined to be unqualified.

[0139] The disclosed embodiment determines whether the inspection is qualified based on the inspection coefficient and the repeatability of the inspection coefficient, which can effectively eliminate the randomness of the inspection result and ensure the accuracy of the inspection result.

[0140] For example, if the oil product is refined oil, the coefficient range is 0.998 to 1.002, and the repeatability threshold is 0.1%; if the oil product is crude oil, the coefficient range is 0.998 to 1.002, and the repeatability threshold is 0.06%.

[0141] Step 305: The metering center equipment sends the verification result to the oil station equipment.

[0142] Optionally, the verification method further comprises:

[0143] If the first verification parameter set does not meet the verification conditions, the metering center equipment sends a check instruction to the oil station equipment;

[0144] The equipment at the oil transfer station receives the inspection instructions sent by the equipment at the metering center;

[0145] The oil transfer station equipment issues a notice to check whether all the oil flowing out of the oil flow meter flows into the standard volume pipe.

[0146] The metering center equipment determines that the calibration conditions are not met. At this time, the volume of oil passing through the oil flow meter is not equal to the volume of oil passing through the standard volume tube. The metering center equipment sends an inspection instruction, and the oil transportation station equipment sends a notification to promptly inspect the oil pipeline to solve the problem that the volume of oil passing through the oil flow meter is not equal to the volume of oil passing through the standard volume tube. After the problem is solved, the oil transportation station equipment can send the first calibration parameter set to the metering center equipment again (i.e., step 301) to calibrate the oil flow meter.

[0147] In actual applications, the measurement center can record the calibration time and calibration times of the oil station equipment, and remind the oil station equipment to replace the calibration tools when the calibration time reaches a time threshold or the calibration times reach a number threshold.

[0148] The present disclosure provides a calibration device for an oil flow meter, which is suitable for Figure 2 or Figure 4 The calibration method of the oil flow meter is shown. Figure 5 This is a schematic diagram of the structure of a calibration device for an oil flow meter provided in an embodiment of the present disclosure. Figure 5 , the verification device comprises:

[0149] The first receiving module 401 is used to receive a first verification parameter set sent by the oil station equipment. The parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube. The standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate.

[0150] The acquisition module 402 is used to send a verification instruction to the oil station equipment when the first verification parameter set meets the verification condition;

[0151] The second receiving module 403 is used to receive a second verification parameter set sent by the oil station equipment according to the verification instruction, and the first verification parameter set is a proper subset of the second verification parameter set;

[0152] A calculation module 404, used to determine the verification result of the oil flow meter according to the second verification parameter set;

[0153] The sending module 405 is used to send the verification result to the equipment of the oil transportation station.

[0154] Optionally, the verification conditions include:

[0155] The difference between the inlet pressure and the outlet pressure of the standard volume tube is less than or equal to the pressure difference threshold;

[0156] The outlet pressure of the standard volume tube is greater than or equal to the pressure threshold;

[0157] The difference between the outlet temperature of the standard volume tube and the temperature inside the oil flow meter is within the temperature range.

[0158] Optionally, the calculation module 404 is used to:

[0159] The standard volume of the standard volume tube is corrected by using the parameters in the second verification parameter set to determine the actual volume of the standard volume tube when the oil flows through it;

[0160] According to the type of oil, the flow measurement value of the oil flow meter flowing through the oil is obtained from the actual volume;

[0161] According to the type of oil, the calibration coefficient of the oil flow meter and the repeatability of the calibration coefficient are obtained from the flow measurement value;

[0162] The calibration result of the oil flow meter is determined based on the calibration coefficient of the oil flow meter and the repeatability of the calibration coefficient.

[0163] Optionally, the calculation module 404 is further configured to:

[0164] If the verification coefficient is within the coefficient range and the repeatability of the verification coefficient is less than or equal to the repeatability threshold, the verification is determined to be qualified;

[0165] If the verification coefficient is outside the coefficient range, or the repeatability of the verification coefficient is greater than the repeatability threshold, the verification is determined to be unqualified.

[0166] Optionally, the verification device further comprises:

[0167] The notification module is used to send an inspection instruction to the oil station equipment if the first verification parameter set does not meet the verification conditions. The inspection instruction is used to instruct the staff to check whether the oil flowing out of the oil flow meter has all flowed into the standard volume tube.

[0168] The present disclosure provides a calibration device for an oil flow meter, which is suitable for Figure 3 or Figure 4 The calibration method of the oil flow meter is shown. Figure 6 This is a schematic diagram of the structure of a calibration device for an oil flow meter provided in an embodiment of the present disclosure. Figure 6 , the verification device comprises:

[0169] A first sending module 501 is used to send a first verification parameter set to a measurement center device. The parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube. The standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate.

[0170] The second sending module 502 is used to send a second verification parameter set to the metrology center device when receiving a verification instruction sent by the metrology center device, the verification instruction is sent by the metrology center device when the first verification parameter set meets the verification condition, and the first verification parameter set is a proper subset of the second verification parameter set;

[0171] The receiving module 503 is used to receive the verification result sent by the measurement center device, where the verification result is determined by the measurement center device according to the second verification parameter set.

[0172] Optionally, the receiving module 503 is further configured to:

[0173] Receive inspection instructions sent by the measurement center equipment.

[0174] Accordingly, the verification device further comprises:

[0175] The notification module is used to send out a notification to check whether all the oil flowing out of the oil flow meter flows into the standard volume tube.

[0176] Figure 7 is a schematic diagram showing the structure of a computer device according to an exemplary embodiment. Figure 7The computer device 700 includes a central processing unit (CPU) 701, a system memory 704 including a random access memory (RAM) 702 and a read-only memory (ROM) 703, and a system bus 705 connecting the system memory 704 and the central processing unit 701. The computer device 700 also includes a basic input / output system (I / O system) 706 that helps transfer information between various components in the computer, and a large-capacity storage device 707 for storing an operating system 713, application programs 714, and other program modules 715.

[0177] The basic input / output system 706 includes a display 708 for displaying information and an input device 709 such as a mouse and a keyboard for user inputting information. The display 708 and the input device 709 are connected to the central processing unit 701 through an input / output controller 710 connected to the system bus 705. The basic input / output system 706 may also include an input / output controller 710 for receiving and processing inputs from a plurality of other devices such as a keyboard, a mouse, or an electronic stylus. Similarly, the input / output controller 710 also provides output to a display screen, a printer, or other types of output devices.

[0178] The mass storage device 707 is connected to the central processing unit 701 through a mass storage controller (not shown) connected to the system bus 705. The mass storage device 707 and its associated computer-readable medium provide non-volatile storage for the server 700. That is, the mass storage device 707 may include a computer-readable medium (not shown) such as a hard disk or a CD-ROM drive.

[0179] Without loss of generality, the computer readable medium may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer readable instructions, data structures, program modules or other data. Computer storage media include RAM, ROM, EPROM, EEPROM, flash memory or other solid-state storage technologies, CD-ROM, DVD or other optical storage, cassettes, magnetic tapes, disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that the computer storage media is not limited to the above. The above-mentioned system memory 704 and mass storage device 707 can be collectively referred to as memory.

[0180] According to various embodiments of the present invention, the computer device 700 can also be connected to a remote computer on the network through a network such as the Internet. That is, the server 700 can be connected to the network 712 through the network interface unit 711 connected to the system bus 705, or the network interface unit 711 can be used to connect to other types of networks or remote computer systems (not shown).

[0181] The memory also includes one or more programs, which are stored in the memory. The CPU 701 implements the Figure 1 ,or Figure 2 ,or Figure 3 The calibration method of the oil flow meter is shown.

[0182] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions, and the above instructions can be executed by a processor of a server to complete the oil flow meter calibration method shown in various embodiments of the present invention. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0183] It should be noted that: the calibration device for the oil flow meter provided in the above embodiment only uses the division of the above functional modules as an example when calibrating the oil flow meter. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the calibration device for the oil flow meter provided in the above embodiment and the calibration method embodiment of the oil flow meter belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0184] The serial numbers of the above-mentioned embodiments of the present disclosure are only for description and do not represent the advantages or disadvantages of the embodiments.

[0185] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0186] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for calibrating an oil flow meter, characterized in that: The verification method comprises: Receive a first verification parameter set sent by the oil station equipment, the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate; the first verification parameter set includes multiple of the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter, and the temperature in the oil flow meter; If the first verification parameter set meets the verification conditions, a verification instruction is sent to the oil transportation station equipment; the verification conditions include: the difference between the inlet pressure and the outlet pressure of the standard volume pipe is less than or equal to the pressure difference threshold; the outlet pressure of the standard volume pipe is greater than or equal to the pressure threshold; the difference between the outlet temperature of the standard volume pipe and the temperature in the oil flow meter is within the temperature range; Receive a second verification parameter set sent by the oil transfer station equipment according to the verification instruction, wherein the first verification parameter set is a true subset of the second verification parameter set; the second verification parameter set includes a plurality of the standard volume of the standard volume tube, the inner diameter of the standard volume tube, the wall thickness of the standard volume tube, the elastic modulus of the standard volume tube, the expansion coefficient of the standard volume tube, the density of the original liquid in the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, the expansion coefficient of the original liquid in the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter and the temperature in the oil flow meter; Determine the verification result of the oil flowmeter according to the second verification parameter set; Determine the verification result of the oil flowmeter according to the second verification parameter set, including: correcting the standard volume of the standard volume tube by using the parameters in the second verification parameter set to determine the actual volume of the standard volume tube when the oil flows through the standard volume tube; according to the type of the oil, obtain the flow measurement value of the oil flowing through the oil flowmeter from the actual volume; according to the type of the oil, obtain the verification coefficient of the oil flowmeter and the repeatability of the verification coefficient from the flow measurement value; determine the verification result of the oil flowmeter according to the verification coefficient of the oil flowmeter and the repeatability of the verification coefficient; The verification result is sent to the oil transfer station equipment.

2. The testing method according to claim 1, characterized in that: Determining the verification result of the oil flow meter according to the verification coefficient of the oil flow meter and the repeatability of the verification coefficient includes: If the verification coefficient is within the coefficient range and the repeatability of the verification coefficient is less than or equal to the repeatability threshold, the verification is determined to be qualified; If the verification coefficient is outside the coefficient range, or the repeatability of the verification coefficient is greater than the repeatability threshold, the verification is determined to be unqualified.

3. The testing method according to claim 1, characterized in that: The verification method further comprises: If the first verification parameter set does not meet the verification conditions, a check instruction is sent to the oil station equipment, wherein the check instruction is used to instruct the staff to check whether the oil flowing out of the oil flow meter has all flowed into the standard volume tube.

4. A method for calibrating an oil flow meter, characterized in that: The verification method comprises: Sending a first verification parameter set to the measurement center equipment, the parameters in the first verification parameter set are used to determine whether the oil flowing out of the oil flow meter all flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate; the first verification parameter set includes multiple of the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter, and the temperature in the oil flow meter; If a calibration instruction sent by the metrology center device is received, a second calibration parameter set is sent to the metrology center device, the calibration instruction is sent by the metrology center device when the first calibration parameter set meets the calibration conditions, and the first calibration parameter set is a true subset of the second calibration parameter set; the calibration conditions include: the difference between the inlet pressure and the outlet pressure of the standard volume tube is less than or equal to the pressure difference threshold; the outlet pressure of the standard volume tube is greater than or equal to the pressure threshold; the difference between the outlet temperature of the standard volume tube and the temperature inside the oil flow meter is within the temperature range; the The second calibration parameter set includes a plurality of the standard volume of the standard volume tube, the inner diameter of the standard volume tube, the wall thickness of the standard volume tube, the elastic modulus of the standard volume tube, the expansion coefficient of the standard volume tube, the density of the original liquid in the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, the expansion coefficient of the original liquid in the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter and the temperature in the oil flow meter; Receive the calibration result sent by the metering center device, the calibration result is determined by the metering center device according to the second calibration parameter set in the following manner: use the parameters in the second calibration parameter set to correct the standard volume of the standard volume tube, and determine the actual volume of the standard volume tube when the oil flows through it; according to the type of the oil, obtain the flow measurement value of the oil flowing through the oil flowmeter from the actual volume; according to the type of the oil, obtain the calibration coefficient of the oil flowmeter and the repeatability of the calibration coefficient from the flow measurement value; determine the calibration result of the oil flowmeter according to the calibration coefficient of the oil flowmeter and the repeatability of the calibration coefficient.

5. The testing method according to claim 4, characterized in that: The verification method further comprises: Receiving an inspection instruction sent by the measurement center equipment; A notice is issued to check whether all the oil flowing out of the oil flow meter flows into the standard volume tube.

6. A calibration device for an oil flow meter, characterized in that: The verification device comprises: A first receiving module is used to receive a first verification parameter set sent by the oil station equipment, wherein the parameters in the first verification parameter set are used to determine whether all the oil flowing out of the oil flow meter flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate; the first verification parameter set includes multiple of the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter, and the temperature in the oil flow meter; The acquisition module is used to send a verification instruction to the oil transportation station equipment when the first verification parameter set meets the verification conditions; the verification conditions include: the difference between the inlet pressure and the outlet pressure of the standard volume pipe is less than or equal to the pressure difference threshold; the outlet pressure of the standard volume pipe is greater than or equal to the pressure threshold; the difference between the outlet temperature of the standard volume pipe and the temperature in the oil flow meter is within the temperature range; a second receiving module, for receiving a second verification parameter set sent by the oil transfer station equipment according to the verification instruction, wherein the first verification parameter set is a true subset of the second verification parameter set; the second verification parameter set includes a plurality of the standard volume of the standard volume tube, the inner diameter of the standard volume tube, the wall thickness of the standard volume tube, the elastic modulus of the standard volume tube, the expansion coefficient of the standard volume tube, the density of the original liquid in the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, the expansion coefficient of the original liquid in the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter and the temperature in the oil flow meter; A calculation module, used for determining the verification result of the oil flow meter according to the second verification parameter set; the determination of the verification result of the oil flow meter according to the second verification parameter set includes: using the parameters in the second verification parameter set to correct the standard volume of the standard volume tube to determine the actual volume of the oil flowing through the standard volume tube; according to the type of the oil, obtaining the flow measurement value of the oil flowing through the oil flow meter from the actual volume; according to the type of the oil, obtaining the verification coefficient of the oil flow meter and the repeatability of the verification coefficient from the flow measurement value; determining the verification result of the oil flow meter according to the verification coefficient of the oil flow meter and the repeatability of the verification coefficient; The sending module is used to send the verification result to the oil transfer station equipment.

7. A calibration device for an oil flow meter, characterized in that: The verification device comprises: A first sending module is used to send a first verification parameter set to the measurement center equipment, the parameters in the first verification parameter set are used to determine whether the oil flowing out of the oil flow meter all flows into the standard volume tube, and the standard volume tube is used to verify whether the measurement result of the oil flow meter is accurate; the first verification parameter set includes multiple of the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter, and the temperature in the oil flow meter; The second sending module is used to send a second set of verification parameters to the metering center device when receiving a verification instruction sent by the metering center device. The verification instruction is sent by the metering center device when the first set of verification parameters meets the verification conditions. The first set of verification parameters is a true subset of the second set of verification parameters. The verification conditions include: the difference between the inlet pressure and the outlet pressure of the standard volume tube is less than or equal to the pressure difference threshold; the outlet pressure of the standard volume tube is greater than or equal to the pressure threshold; the difference between the outlet temperature of the standard volume tube and the temperature in the oil flow meter is within the temperature range The second calibration parameter set includes a plurality of the standard volume of the standard volume tube, the inner diameter of the standard volume tube, the wall thickness of the standard volume tube, the elastic modulus of the standard volume tube, the expansion coefficient of the standard volume tube, the density of the original liquid in the standard volume tube, the compression coefficient of the original liquid in the standard volume tube, the expansion coefficient of the original liquid in the standard volume tube, the inlet pressure of the standard volume tube, the outlet pressure of the standard volume tube, the inlet temperature of the standard volume tube, the outlet temperature of the standard volume tube, the pressure in the oil flow meter and the temperature in the oil flow meter; A receiving module is used to receive the calibration result sent by the measurement center equipment, and the calibration result is determined by the measurement center equipment according to the second calibration parameter set in the following manner: the standard volume of the standard volume tube is corrected by using the parameters in the second calibration parameter set to determine the actual volume of the standard volume tube when the oil flows through it; according to the type of the oil, the flow measurement value of the oil flowing through the oil flowmeter is obtained from the actual volume; according to the type of the oil, the calibration coefficient of the oil flowmeter and the repeatability of the calibration coefficient are obtained from the flow measurement value; according to the calibration coefficient of the oil flowmeter and the repeatability of the calibration coefficient, the calibration result of the oil flowmeter is determined.

8. A computer device, characterized in that: The computer device comprises: processor; a memory configured to store executable instructions for the processor; The processor is configured to execute the method according to any one of claims 1 to 3, or to execute the method according to any one of claims 4 to 5.

9. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor of a computer device, the computer device is enabled to execute the method according to any one of claims 1 to 3, or to execute the method according to any one of claims 4 to 5.

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