Calibration method, system, device and equipment for hydrocarbon dew-point instrument

Abstract

The invention discloses a method, a system, a device and equipment for calibrating a hydrocarbon dew-point instrument. The calibration method of the hydrocarbon dew-point instrument comprises the following steps: acquiring a hydrocarbon dew-point measurement value output by a to-be-calibrated hydrocarbon dew-point instrument for standard gas under set pressure; determining a hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure; determining a calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value; and calibrating the hydrocarbon dew-point instrument to be calibrated based on the corresponding relationship between the hydrocarbon dew-point measurement value and the calibration value. According to the technical scheme provided by the embodiment of the invention, the calibration can be completed under the condition that the hydrocarbon dew-point instrument to be calibrated does not need to be disassembled, and the calibration cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dew point meter calibration, and in particular to a calibration method, system, device and equipment for a hydrocarbon dew point meter. Background Art

[0002] Since natural gas contains a variety of hydrocarbons, when the ambient temperature is lower than the hydrocarbon dew point, the heavy hydrocarbon components are easy to condense, leading to problems such as blockage of natural gas transmission pipelines, equipment corrosion and production interruption. Therefore, accurate determination of the hydrocarbon dew point in natural gas is crucial to ensure the safe transportation of natural gas.

[0003] At present, the method of measuring the hydrocarbon dew point of natural gas is mostly direct measurement of the hydrocarbon dew point. Among them, the cooling mirror method is a method of direct measurement based on the physical definition of the hydrocarbon dew point. This detection method can be used to measure the hydrocarbon dew point under working conditions, and has the advantages of being intuitive and accurate. Internationally, the weighing method is used to determine the potential liquid hydrocarbon content in natural gas to calibrate the accuracy of the measurement results of the hydrocarbon dew point meter. However, this method is difficult to operate on site, and the dew point meter equipment needs to be disassembled and sent for inspection. The calibration cycle is long and the cost is high. Summary of the invention

[0004] The present invention provides a hydrocarbon dew point meter calibration method, system, device and equipment to solve the problems of long calibration period and high cost of the existing hydrocarbon dew point meter.

[0005] According to one aspect of the present invention, there is provided a method for calibrating a hydrocarbon dew point meter, comprising:

[0006] Obtaining a hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for a standard gas at a set pressure;

[0007] According to the set pressure, determining a hydrocarbon dew point standard value of the standard gas at the set pressure;

[0008] determining a calibration value associated with the hydrocarbon dew point measurement value based on the hydrocarbon dew point measurement value and a hydrocarbon dew point standard value;

[0009] Based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, the hydrocarbon dew point meter to be calibrated is calibrated.

[0010] According to another aspect of the present invention, there is provided a calibration system for a hydrocarbon dew point instrument, further comprising: a gas cylinder, a pressure regulator, a digital pressure gauge, a hydrocarbon dew point instrument to be calibrated, a flow regulating valve, a gas flow meter, and a processor;

[0011] The gas cylinder is filled with standard gas, and the standard gas of set pressure is filled into the hydrocarbon dew point meter to be calibrated by controlling the pressure regulator at the mouth of the gas cylinder;

[0012] The digital pressure gauge is arranged between the gas cylinder and the hydrocarbon dew point meter to be calibrated, and is used to measure the pressure of the standard gas filled in the hydrocarbon dew point meter to be calibrated;

[0013] The hydrocarbon dew point instrument to be calibrated is used to output a hydrocarbon dew point measurement value for a standard gas having an input set pressure;

[0014] The flow regulating valve is used to adjust the flow of the gas outlet of the hydrocarbon dew point meter to be calibrated according to the flow output requirement;

[0015] The gas flow meter is used to detect the flow rate of the gas outlet of the hydrocarbon dew point meter to be calibrated;

[0016] The processor is used to execute the hydrocarbon dew point meter calibration method described in any embodiment of the present invention.

[0017] According to another aspect of the present invention, there is provided a calibration device for a hydrocarbon dew point meter, comprising:

[0018] A measurement value acquisition module, used to obtain the hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for the standard gas under a set pressure;

[0019] A standard value acquisition module, used to determine the hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure;

[0020] a calibration value determination module, configured to determine a calibration value associated with the hydrocarbon dew point measurement value based on the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value;

[0021] The dew point meter calibration module is used to calibrate the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0022] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0023] at least one processor; and

[0024] a memory communicatively connected to the at least one processor; wherein,

[0025] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the calibration method for the hydrocarbon dew point meter according to any embodiment of the present invention.

[0026] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the calibration method of the hydrocarbon dew point meter described in any embodiment of the present invention when executed.

[0027] According to another aspect of the present invention, a computer program product is provided, comprising a computer program, and when the computer program is executed by a processor, the computer program implements the calibration method of the hydrocarbon dew point meter according to any embodiment of the present invention.

[0028] The technical solution of the embodiment of the present invention obtains the hydrocarbon dew point measurement value output by the hydrocarbon dew point meter to be calibrated for the standard gas under a set pressure, determines the hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure, and then determines the calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value, and finally calibrates the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. The calibration can be completed without disassembling the hydrocarbon dew point meter to be calibrated, thereby reducing the calibration cost.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a flow chart of a calibration method for a hydrocarbon dew point meter provided according to Embodiment 1 of the present invention;

[0032] Figure 2 is a flow chart of a calibration method for a hydrocarbon dew point meter provided according to Embodiment 2 of the present invention;

[0033] Figure 3 is a structural schematic diagram of a calibration system for a hydrocarbon dew point meter provided according to Embodiment 3 of the present invention;

[0034] Figure 4 is a structural schematic diagram of a calibration device for a hydrocarbon dew point meter provided according to a fourth embodiment of the present invention;

[0035] Figure 5 It is a structural schematic diagram of an electronic device for implementing the calibration method of the hydrocarbon dew point meter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Embodiment 1

[0039] Figure 1 A flow chart of a hydrocarbon dew point meter calibration method is provided for the first embodiment of the present invention. This embodiment is applicable to the case of online calibration of a hydrocarbon dew point meter. The method can be performed by a hydrocarbon dew point meter calibration device. The hydrocarbon dew point meter calibration device can be implemented in the form of hardware and / or software. The hydrocarbon dew point meter calibration device can be configured in various general computing devices, for example, in a laptop computer, a desktop computer or a tablet computer. Figure 1 As shown, the method includes:

[0040] S110, obtaining a hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for a standard gas at a set pressure.

[0041] Since natural gas contains a variety of hydrocarbons, when the ambient temperature is lower than the hydrocarbon dew point, the heavy hydrocarbon components are easy to condense, leading to problems such as blockage of natural gas transmission pipelines, equipment corrosion and production interruption. Therefore, a hydrocarbon dew point meter is needed to measure the hydrocarbon dew point value of gas in the natural gas pipeline.

[0042] The accuracy of the hydrocarbon dew point meter's measurement results is crucial to the safe transportation of natural gas, so the hydrocarbon dew point meter needs to be calibrated. The calibration of the existing chilled mirror hydrocarbon dew point meter requires the hydrocarbon dew point meter to be disassembled from the site and transported to the laboratory for calibration, which has high time and labor costs.

[0043] The hydrocarbon dew point meter to be calibrated is an instrument connected to a natural gas pipeline to measure the hydrocarbon dew point temperature of the gas in the natural gas pipeline.

[0044] In the embodiment of the present invention, in order to improve the calibration convenience of the hydrocarbon dew point instrument to be calibrated and reduce the calibration cost, the instrument is calibrated by filling the hydrocarbon dew point instrument to be calibrated with a standard gas of a set pressure. Specifically, first, the staff will adjust the pressure regulator at the mouth of the gas cylinder to fill the standard gas of the set pressure into the hydrocarbon dew point instrument to be calibrated. The processor obtains the hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for the standard gas at the set pressure. The standard gas is a pure gas standard gas, for example, the standard gas is pure propane gas.

[0045] In order to improve the measurement accuracy, multiple initial hydrocarbon dew point values ​​output by the hydrocarbon dew point instrument to be calibrated for a set pressure within a set measurement period can be obtained, and then the average of the multiple initial hydrocarbon dew point values ​​can be obtained as the hydrocarbon dew point measurement value.

[0046] S120. Determine, according to the set pressure, a hydrocarbon dew point standard value of the standard gas at the set pressure.

[0047] In the embodiment of the present invention, in order to calibrate the hydrocarbon dew point meter to be calibrated, it is necessary to determine the hydrocarbon dew point standard value associated with the hydrocarbon dew point measurement value. Specifically, according to the set pressure, a mapping list of the pressure corresponding to the standard gas and the hydrocarbon dew point standard value can be searched, and the hydrocarbon dew point standard value associated with the set pressure can be extracted from the list for calibrating the hydrocarbon dew point meter to be calibrated.

[0048] In addition, the Antoine equation can also be used to calculate the hydrocarbon dew point standard value of the current standard gas at the set pressure.

[0049] In a specific example, pure propane gas with a pressure of 0.168 MPa is input into the hydrocarbon dew point meter to be calibrated to obtain the hydrocarbon dew point measurement value of the hydrocarbon dew point meter to be calibrated. A mapping list of the pressure and hydrocarbon dew point standard value corresponding to the pure propane gas is searched, and the hydrocarbon dew point standard value associated with 0.168 MPa is extracted from the list as -30°C, which is used to calibrate the hydrocarbon dew point meter to be calibrated.

[0050] S130. Determine a calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value.

[0051] In the embodiment of the present invention, a calibration value associated with the hydrocarbon dew point measurement value is determined based on the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value. Specifically, the error between the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value is calculated as the calibration value associated with the current hydrocarbon dew point measurement value, and the calculation formula is as follows:

[0052] ΔT=Td-Tb

[0053] Where ΔT is the calibration value, °C, Td is the measured value of hydrocarbon dew point, °C, and Tb is the standard value of hydrocarbon dew point, °C.

[0054] By charging the standard gas with different set pressures into the hydrocarbon dew point instrument to be calibrated for multiple times, multiple hydrocarbon dew point measurement values ​​and hydrocarbon dew point standard values ​​corresponding to each hydrocarbon dew point measurement value can be obtained. Then, the calibration value corresponding to each pair of hydrocarbon dew point measurement value and hydrocarbon dew point standard value is calculated. Finally, a list of multiple hydrocarbon dew point measurement values ​​and corresponding calibration values ​​can be obtained.

[0055] S140: Calibrate the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0056] In an embodiment of the present invention, the hydrocarbon dew point instrument to be calibrated is calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. Specifically, after the hydrocarbon dew point instrument to be calibrated outputs the hydrocarbon dew point value to be calibrated for the natural gas to be measured, the target calibration value associated with the hydrocarbon dew point value to be calibrated is determined based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. The hydrocarbon dew point instrument to be calibrated is calibrated based on the target calibration value. The target calibration values ​​corresponding to different hydrocarbon dew point values ​​to be calibrated are different.

[0057] In a specific example, the hydrocarbon dew point value to be calibrated outputted by the hydrocarbon dew point instrument to be calibrated for the natural gas to be measured is obtained, and a target hydrocarbon dew point measurement value equal to the hydrocarbon dew point value to be calibrated is searched in a list of associated storage of hydrocarbon dew point measurement values ​​and corresponding calibration values. If there is a target hydrocarbon dew point value equal to the hydrocarbon dew point value to be calibrated in the list, the calibration value corresponding to the target hydrocarbon dew point measurement value is used as the target calibration value corresponding to the hydrocarbon dew point value to be calibrated, and calibration is performed based on the target calibration value.

[0058] In another specific example, the hydrocarbon dew point value to be calibrated output by the hydrocarbon dew point instrument to be calibrated for the natural gas to be measured is obtained, and a target hydrocarbon dew point measurement value equal to the hydrocarbon dew point value to be calibrated is searched in a list of associated storage of hydrocarbon dew point measurement values ​​and corresponding calibration values. If there is no target hydrocarbon dew point value equal to the hydrocarbon dew point value to be calibrated in the list, two hydrocarbon dew point measurement values ​​adjacent to both sides of the hydrocarbon dew point value to be calibrated and calibration values ​​associated with the two adjacent hydrocarbon dew point measurement values ​​are determined in the list. Finally, according to the two adjacent hydrocarbon dew point measurement values ​​and the calibration values ​​associated with the two adjacent hydrocarbon dew point measurement values, a linear interpolation method is used to determine the target calibration value corresponding to the hydrocarbon dew point value to be calibrated, and the instrument is calibrated based on the target calibration value.

[0059] The technical solution of the embodiment of the present invention obtains the hydrocarbon dew point measurement value output by the hydrocarbon dew point meter to be calibrated for the standard gas under a set pressure, determines the hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure, and then determines the calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value, and finally calibrates the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. The calibration can be completed without disassembling the hydrocarbon dew point meter to be calibrated, thereby reducing the calibration cost.

[0060] Embodiment 2

[0061] Figure 2 This is a flow chart of a calibration method for a hydrocarbon dew point meter provided in the second embodiment of the present invention. This embodiment further refines the above embodiment and provides specific steps for obtaining the hydrocarbon dew point measurement value output by the hydrocarbon dew point meter to be calibrated for the standard gas under a set pressure, and specific steps for calibrating the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. Figure 2 As shown, the method includes:

[0062] S210, obtaining a plurality of initial hydrocarbon dew point values ​​output by the hydrocarbon dew point instrument to be calibrated for a standard gas at a set pressure within a set measurement period.

[0063] In the embodiment of the present invention, in order to avoid the problem of inaccurate measurement caused by accidental errors, the processor needs to obtain multiple initial hydrocarbon dew point values ​​output by the hydrocarbon dew point instrument to be calibrated for the standard gas at a set pressure within a set measurement period. Exemplarily, after the standard gas at a set pressure is charged into the hydrocarbon dew point instrument to be calibrated, the initial hydrocarbon dew point values ​​output by the hydrocarbon dew point instrument to be calibrated are collected 6 times within 2 minutes.

[0064] Optionally, the standard gas is pure propane gas.

[0065] S220, calculating an average of multiple initial hydrocarbon dew point values ​​within a set measurement period as a hydrocarbon dew point measurement value of the standard gas under a set pressure.

[0066] In the embodiment of the present invention, the average of multiple hydrocarbon dew point values ​​within a set measurement period is calculated as the hydrocarbon dew point measurement value of the standard gas under the set pressure. For example, the average of 6 initial hydrocarbon dew point values ​​collected within 2 minutes is calculated as the hydrocarbon dew point measurement value. By calculating the average of multiple measurement results within a set measurement period, the measurement error caused by accidental error factors can be reduced.

[0067] S230. According to the set pressure, determine the hydrocarbon dew point standard value of the standard gas under the set pressure.

[0068] Alternatively, the hydrocarbon dew point standard value may be calculated as follows:

[0069]

[0070] Where P is the set pressure, T is the hydrocarbon dew point value, and A, B, and C are constants of the standard gas.

[0071] In this optional embodiment, the hydrocarbon dew point standard value of the standard gas at the set pressure is calculated based on the functional relationship between the pressure of the standard gas and the hydrocarbon dew point value defined in the Antoine equation.

[0072] S240: Determine a calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value.

[0073] In the embodiment of the present invention, multiple hydrocarbon dew point measurement values ​​and calibration values ​​corresponding to each hydrocarbon dew point measurement value can be obtained by charging standard gases with different set pressures into the hydrocarbon dew point instrument to be calibrated for multiple times. Then, the hydrocarbon dew point standard value corresponding to each pair of hydrocarbon dew point measurement value and hydrocarbon dew point standard value is calculated. Finally, multiple hydrocarbon dew point measurement values ​​and corresponding calibration values ​​can be associated and stored in a list.

[0074] S250: Calibrate the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0075] Optionally, based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, the hydrocarbon dew point meter to be calibrated is calibrated, including:

[0076] Obtaining a dew point value of the hydrocarbon to be calibrated output by the hydrocarbon dew point instrument to be calibrated for the natural gas to be tested;

[0077] Determining a target calibration value corresponding to the hydrocarbon dew point value to be calibrated based on a correspondence between the hydrocarbon dew point measurement value and the calibration value;

[0078] Based on the target calibration value, the hydrocarbon dew point meter to be calibrated is calibrated.

[0079] In this optional embodiment, a specific method for calibrating the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value is provided: first, the hydrocarbon dew point value to be calibrated output by the hydrocarbon dew point meter to be calibrated for the natural gas to be measured is obtained. Then, in the associated storage list of hydrocarbon dew point measurement values ​​and corresponding calibration values, a target hydrocarbon dew point measurement value equal to the hydrocarbon dew point value to be calibrated is searched. If there is a target hydrocarbon dew point value equal to the hydrocarbon dew point value to be calibrated in the list, the calibration value corresponding to the target hydrocarbon dew point measurement value is used as the target calibration value corresponding to the hydrocarbon dew point value to be calibrated, and calibration is performed based on the target calibration value. Through the hydrocarbon dew point measurement value and the corresponding stored calibration value, the calibration value of the dew point meter to be calibrated at different dew point temperatures can be accurately determined, thereby improving the calibration reliability.

[0080] Optionally, based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, determining a target calibration value corresponding to the hydrocarbon dew point value to be calibrated includes:

[0081] According to the hydrocarbon dew point value to be calibrated and the correspondence between the hydrocarbon dew point measurement value and the calibration value, a linear interpolation method is used to determine the target calibration value corresponding to the hydrocarbon dew point value to be calibrated.

[0082] In this optional embodiment, a specific method for determining a target calibration value corresponding to a hydrocarbon dew point value to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value is provided: a linear interpolation method is used to determine the target calibration value corresponding to the hydrocarbon dew point value to be calibrated according to the hydrocarbon dew point value to be calibrated and the correspondence between the hydrocarbon dew point measurement value and the calibration value. By using the linear interpolation method to determine the target calibration value, a reliable calibration value corresponding to the current hydrocarbon dew point temperature can be confirmed with a small amount of calculation, thereby improving the reliability of calibration.

[0083] Optionally, before calibrating the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, the method further includes:

[0084] Determining a first standard uncertainty component according to a constant of the standard gas and a measurement range of the hydrocarbon dew point meter to be calibrated;

[0085] determining a second standard uncertainty component based on the resolution of the hydrocarbon dew point instrument to be calibrated;

[0086] determining a third standard uncertainty component based on a standard deviation of a plurality of initial hydrocarbon dew point values ​​measured within a set measurement period;

[0087] Determine a combined standard uncertainty based on the first standard uncertainty component, the second standard uncertainty component and the third standard uncertainty component, and determine an expanded uncertainty based on the combined standard uncertainty;

[0088] When the expanded uncertainty meets the calibration requirements, an operation of calibrating the hydrocarbon dew point meter to be calibrated is performed based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0089] In this optional embodiment, based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, before calibrating the hydrocarbon dew point instrument to be calibrated, the uncertainty of the current calibration method can also be calculated, and the uncertainty is used to consider whether to use the current calibration method to calibrate the hydrocarbon dew point instrument to be calibrated. The calculation method of the uncertainty is as follows:

[0090] First, calculate the uncertainty of the instrument given by the superior standard as the first standard uncertainty component. The specific calculation method is as follows:

[0091] By Antoine formula Knowable

[0092] Where P is the set pressure, T is the hydrocarbon dew point value, and A, B, and C are constants of the standard gas.

[0093] Taking the partial derivative with respect to P, we get

[0094] When the standard gas is pure propane gas, the constants corresponding to pure propane are A = 6.82973, B = 813.2, and C = 248. According to the measurement range of the hydrocarbon dew point meter to be calibrated, for example, -30°C-20°C, considering the most unfavorable factor of uncertainty, -30°C is selected as the uncertainty evaluation point, that is, P = 0.168MPa (i.e. 1260.1 mmHg) is substituted into the above partial derivative formula, and the first standard uncertainty component introduced after calculation is:

[0095]

[0096] Then, the second standard uncertainty component is determined according to the resolution of the hydrocarbon dew point instrument to be calibrated. For example, if the resolution of the hydrocarbon dew point instrument to be calibrated is 0.1°C and the distribution is uniform, then the second standard uncertainty component caused by the resolution of the hydrocarbon dew point instrument to be calibrated is:

[0097]

[0098] Furthermore, the third standard uncertainty component is determined according to the standard deviation of multiple initial hydrocarbon dew point values ​​measured within the set measurement period. Taking the hydrocarbon dew point value as 0.0°C as an example, the measurement is repeated 6 times under the same conditions, and the results are shown in Table 1.

[0099] Table 1

[0100] Serial number 1 2 3 4 5 6 data 0.1℃ 0.4℃ 0.3℃ 0.4℃ 0.1℃ 0.5℃

[0101] Standard deviation of a single experiment:

[0102]

[0103] Among them, T i is the hydrocarbon dew point value measured at the ith measurement, T d is the average of n measurements.

[0104] The third standard uncertainty component caused by the repeatability of the indication is:

[0105]

[0106] Further, based on the first standard uncertainty component, the second standard uncertainty component and the third standard uncertainty component, a combined standard uncertainty is determined, and based on the combined standard uncertainty, an expanded uncertainty is determined.

[0107] Specifically, since the uncertainty u(T2) caused by the repeatability of the indication is larger than the uncertainty u(T1) caused by the resolution of the hydrocarbon dew point meter to be calibrated, the third standard uncertainty component is selected and the second standard uncertainty component is ignored.

[0108] Then, based on the first standard uncertainty component and the second standard uncertainty component, the combined standard uncertainty is determined as follows:

[0109]

[0110] Furthermore, the expanded uncertainty is determined based on the combined standard uncertainty, as follows:

[0111] If k=2, the expanded uncertainty is:

[0112] U=2u(T)=0.2℃

[0113] The smaller the expanded uncertainty is, the higher the reliability of the currently used calibration method is. When the expanded uncertainty meets the calibration requirements, the hydrocarbon dew point instrument to be calibrated is calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0114] The technical solution of the embodiment of the present invention, after obtaining the correspondence between the hydrocarbon dew point measurement value and the calibration value, determines the target calibration value corresponding to the hydrocarbon dew point value to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, and then calibrates the hydrocarbon dew point instrument to be calibrated based on the target calibration value. For different hydrocarbon dew point values ​​to be calibrated, different target calibration values ​​are determined, which can achieve more accurate calibration.

[0115] Embodiment 3

[0116] Figure 3 This is a schematic diagram of the structure of a calibration system for a hydrocarbon dew point meter provided in Example 3 of the present invention. Figure 3 As shown, the system includes: a gas cylinder 1, a pressure regulator 2, a digital pressure gauge 3, a hydrocarbon dew point meter to be calibrated 4, a flow regulating valve 5, a gas flow meter 6 and a processor 7;

[0117] The gas cylinder 1 is filled with standard gas, and the standard gas of set pressure is filled into the hydrocarbon dew point meter 4 to be calibrated by controlling the pressure regulator 2 at the mouth of the gas cylinder 1.

[0118] The digital pressure gauge 3 is arranged between the gas cylinder 1 and the hydrocarbon dew point meter 4 to be calibrated, and is used to measure the pressure of the standard gas filled in the hydrocarbon dew point meter 4 to be calibrated.

[0119] In the embodiment of the present invention, the gas cylinder 1 is filled with pure propane gas, and by adjusting the pressure regulator (specifically, the pressure regulating valve) at the bottle mouth, the standard gas of set pressure can be charged into the hydrocarbon dew point meter to be calibrated 4. The gas pressure can be measured and displayed by the digital pressure gauge 3 disposed between the gas cylinder 1 and the hydrocarbon dew point meter to be calibrated 4.

[0120] The hydrocarbon dew point meter 4 to be calibrated is used to output a hydrocarbon dew point measurement value for a standard gas of an input set pressure.

[0121] A flow regulating valve 5, used to adjust the flow of the gas outlet of the hydrocarbon dew point meter 4 to be calibrated according to the flow output requirement;

[0122] The gas flow meter 6 is used to detect the flow rate of the gas outlet of the hydrocarbon dew point meter 4 to be calibrated.

[0123] In the embodiment of the present invention, the flow rate of the gas outlet of the hydrocarbon dew point instrument to be calibrated 4 needs to be adjusted to within the flow rate output range according to the flow rate output range given by the manufacturer of the hydrocarbon dew point instrument to be calibrated. The flow rate of the gas outlet of the hydrocarbon dew point instrument to be calibrated 4 can be detected by a gas flow meter 6.

[0124] The processor 7 is used to execute the hydrocarbon dew point meter calibration method of any embodiment of the present invention, specifically:

[0125] Obtaining a hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument 4 to be calibrated for a standard gas at a set pressure;

[0126] According to the set pressure, determine the hydrocarbon dew point standard value of the standard gas at the set pressure;

[0127] determining a calibration value associated with the hydrocarbon dew point measurement value based on the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value;

[0128] Based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, the hydrocarbon dew point meter 4 to be calibrated is calibrated.

[0129] Specifically, the processor 7 can obtain the hydrocarbon dew point value to be calibrated output by the hydrocarbon dew point instrument to be calibrated for the natural gas to be measured, and then determine the target calibration value corresponding to the hydrocarbon dew point value to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, and finally calibrate the hydrocarbon dew point instrument to be calibrated 4 based on the target calibration value. Exemplarily, the target calibration value corresponding to the hydrocarbon dew point value to be calibrated can be determined by a linear interpolation method based on the hydrocarbon dew point value to be calibrated and the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0130] The technical solution of the embodiment of the present invention obtains the hydrocarbon dew point measurement value output by the hydrocarbon dew point meter to be calibrated for the standard gas under a set pressure, determines the hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure, and then determines the calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value, and finally calibrates the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. The calibration can be completed without disassembling the hydrocarbon dew point meter to be calibrated, thereby reducing the calibration cost.

[0131] Embodiment 4

[0132] Figure 4 This is a schematic diagram of the structure of a calibration device for a hydrocarbon dew point meter provided in Example 4 of the present invention. Figure 4 As shown, the device comprises:

[0133] The measurement value acquisition module 410 is used to obtain the hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for the standard gas under a set pressure;

[0134] A standard value acquisition module 420, for determining a hydrocarbon dew point standard value of the standard gas at the set pressure according to the set pressure;

[0135] A calibration value determination module 430, configured to determine a calibration value associated with the hydrocarbon dew point measurement value based on the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value;

[0136] The dew point meter calibration module 440 is used to calibrate the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

[0137] The technical solution of the embodiment of the present invention obtains the hydrocarbon dew point measurement value output by the hydrocarbon dew point meter to be calibrated for the standard gas under a set pressure, determines the hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure, and then determines the calibration value associated with the hydrocarbon dew point measurement value according to the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value, and finally calibrates the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value. The calibration can be completed without disassembling the hydrocarbon dew point meter to be calibrated, thereby reducing the calibration cost.

[0138] Optionally, the dew point meter calibration module 440 includes:

[0139] A hydrocarbon dew point value acquisition unit to be calibrated is used to acquire the hydrocarbon dew point value to be calibrated output by the hydrocarbon dew point instrument to be calibrated for the natural gas to be tested;

[0140] a target calibration value determination unit, configured to determine a target calibration value corresponding to the hydrocarbon dew point value to be calibrated based on a correspondence between the hydrocarbon dew point measurement value and the calibration value;

[0141] The hydrocarbon dew point calibration unit is used to calibrate the hydrocarbon dew point meter to be calibrated based on the target calibration value.

[0142] Optionally, the target calibration value determination unit is specifically used to:

[0143] According to the hydrocarbon dew point value to be calibrated and the correspondence between the hydrocarbon dew point measurement value and the calibration value, a linear interpolation method is used to determine a target calibration value corresponding to the hydrocarbon dew point value to be calibrated.

[0144] Optionally, the hydrocarbon dew point standard value is calculated as follows:

[0145]

[0146] Where P is the set pressure, T is the hydrocarbon dew point value, and A, B, and C are constants of the standard gas.

[0147] Optionally, the measurement value acquisition module 410 is specifically used to:

[0148] Acquire multiple initial hydrocarbon dew point values ​​output by the hydrocarbon dew point instrument to be calibrated for standard gas at a set pressure within a set measurement period;

[0149] An average value of multiple initial hydrocarbon dew point values ​​within the set measurement period is calculated as the hydrocarbon dew point measurement value of the standard gas under the set pressure.

[0150] Optionally, the calibration device for the hydrocarbon dew point meter also includes:

[0151] A first component determination module, configured to determine a first standard uncertainty component according to a constant of the standard gas and a measurement range of the hydrocarbon dew point instrument to be calibrated before calibrating the hydrocarbon dew point instrument to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value;

[0152] A second component determination module, configured to determine a second standard uncertainty component according to the resolution of the hydrocarbon dew point meter to be calibrated;

[0153] A third component determination module, configured to determine a third standard uncertainty component according to a standard deviation of a plurality of initial hydrocarbon dew point values ​​measured within a set measurement period;

[0154] An expanded uncertainty determination module, configured to determine a combined standard uncertainty based on the first standard uncertainty component, the second standard uncertainty component and the third standard uncertainty component, and to determine an expanded uncertainty based on the combined standard uncertainty;

[0155] The calibration execution module is used to execute the operation of calibrating the hydrocarbon dew point instrument to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value when the expanded uncertainty meets the calibration requirements.

[0156] Optionally, the standard gas is pure propane gas.

[0157] The calibration device for a hydrocarbon dew point meter provided in an embodiment of the present invention can execute the calibration method for a hydrocarbon dew point meter provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0158] In the technical solution of the present invention, the collected information is information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data comply with the relevant laws, regulations and standards of relevant countries and regions, take necessary confidentiality measures, do not violate public order and good morals, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0159] Embodiment 5

[0160] According to an embodiment of the present invention, the present invention also provides an electronic device, a readable storage medium and a computer program product.

[0161] Figure 5 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, applicators, blade applicators, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0162] like Figure 5 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0163] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0164] The processor 11 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a calibration method for a hydrocarbon dew point meter.

[0165] In some embodiments, the calibration method of the hydrocarbon dew point meter may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the calibration method of the hydrocarbon dew point meter described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the calibration method of the hydrocarbon dew point meter in any other appropriate manner (e.g., by means of firmware).

[0166] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0167] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or application.

[0168] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0169] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0170] The systems and techniques described herein may be implemented in a computing system that includes a backend component (e.g., as a data applier), or a computing system that includes a middleware component (e.g., an application applier), or a computing system that includes a frontend component (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0171] A computing system may include a client and an application server. The client and the application server are generally remote from each other and usually interact through a communication network. The relationship between the client and the application server is generated by computer programs running on corresponding computers and having a client-application server relationship with each other. The application server may be a cloud application server, also known as a cloud computing application server or a cloud host, which is a host product in a cloud computing application system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS applications.

[0172] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0173] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calibrating a hydrocarbon dew point meter, characterized in that: include: Obtaining a hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for a standard gas at a set pressure; According to the set pressure, determining a hydrocarbon dew point standard value of the standard gas at the set pressure; determining a calibration value associated with the hydrocarbon dew point measurement value based on the hydrocarbon dew point measurement value and a hydrocarbon dew point standard value; Based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, the hydrocarbon dew point meter to be calibrated is calibrated.

2. The method according to claim 1, characterized in that Based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, calibrating the hydrocarbon dew point meter to be calibrated includes: Obtaining a dew point value of the hydrocarbon to be calibrated output by the hydrocarbon dew point instrument to be calibrated for the natural gas to be tested; Determining a target calibration value corresponding to the hydrocarbon dew point value to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value; The hydrocarbon dew point meter to be calibrated is calibrated based on the target calibration value.

3. The method according to claim 2, characterized in that Determining a target calibration value corresponding to the hydrocarbon dew point value to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value includes: According to the hydrocarbon dew point value to be calibrated and the correspondence between the hydrocarbon dew point measurement value and the calibration value, a linear interpolation method is used to determine a target calibration value corresponding to the hydrocarbon dew point value to be calibrated.

4. The method according to claim 1, characterized in that The hydrocarbon dew point standard value is calculated as follows: Where P is the set pressure, T is the hydrocarbon dew point value, and A, B, and C are constants of the standard gas.

5. The method according to claim 1, characterized in that: Obtain the hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for the standard gas at the set pressure, including: Acquire multiple initial hydrocarbon dew point values ​​output by the hydrocarbon dew point instrument to be calibrated for standard gas at a set pressure within a set measurement period; An average value of multiple initial hydrocarbon dew point values ​​within the set measurement period is calculated as the hydrocarbon dew point measurement value of the standard gas under the set pressure.

6. The method according to claim 1, characterized in that Before calibrating the hydrocarbon dew point instrument to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value, the method further includes: Determining a first standard uncertainty component according to the constant of the standard gas and the measurement range of the hydrocarbon dew point meter to be calibrated; Determining a second standard uncertainty component according to the resolution of the hydrocarbon dew point meter to be calibrated; determining a third standard uncertainty component based on a standard deviation of a plurality of initial hydrocarbon dew point values ​​measured within a set measurement period; Determine a combined standard uncertainty based on the first standard uncertainty component, the second standard uncertainty component and the third standard uncertainty component, and determine an expanded uncertainty based on the combined standard uncertainty; In the case where the expanded uncertainty meets the calibration requirement, an operation of calibrating the hydrocarbon dew point instrument to be calibrated is performed based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

7. The method according to any one of claims 1 to 6, characterized in that: The standard gas is pure propane gas.

8. A calibration system for a hydrocarbon dew point meter, characterized in that: include: Gas cylinders, pressure regulators, digital pressure gauges, hydrocarbon dew point meters to be calibrated, flow control valves, gas flow meters, and processors; The gas cylinder is filled with standard gas, and the standard gas of set pressure is filled into the hydrocarbon dew point meter to be calibrated by controlling the pressure regulator at the mouth of the gas cylinder; The digital pressure gauge is arranged between the gas cylinder and the hydrocarbon dew point meter to be calibrated, and is used to measure the pressure of the standard gas filled in the hydrocarbon dew point meter to be calibrated; The hydrocarbon dew point instrument to be calibrated is used to output a hydrocarbon dew point measurement value for a standard gas having an input set pressure; The flow regulating valve is used to adjust the flow of the gas outlet of the hydrocarbon dew point meter to be calibrated according to the flow output requirement; The gas flow meter is used to detect the flow rate of the gas outlet of the hydrocarbon dew point meter to be calibrated; The processor is used to execute the hydrocarbon dew point meter calibration method described in any one of claims 1-7.

9. A calibration device for a hydrocarbon dew point meter, characterized in that: include: A measurement value acquisition module, used to obtain the hydrocarbon dew point measurement value output by the hydrocarbon dew point instrument to be calibrated for the standard gas under a set pressure; A standard value acquisition module, used to determine the hydrocarbon dew point standard value of the standard gas under the set pressure according to the set pressure; a calibration value determination module, configured to determine a calibration value associated with the hydrocarbon dew point measurement value based on the hydrocarbon dew point measurement value and the hydrocarbon dew point standard value; The dew point meter calibration module is used to calibrate the hydrocarbon dew point meter to be calibrated based on the correspondence between the hydrocarbon dew point measurement value and the calibration value.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so as to enable the at least one processor to perform the method for calibrating a hydrocarbon dew point meter according to any one of claims 1 to 7.

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