A method for calibrating a fuel dispenser, a computer storage medium, and electronic equipment.

Abstract

This application discloses a fuel dispenser calibration method, a computer storage medium, and an electronic device. The method involves obtaining the calibration medium injected into a standard metal measuring vessel through a quantitative dispensing method, and collecting the physical height reflecting the real-time liquid level in the standard metal measuring vessel, denoted as the first calibration height. Simultaneously, the temperature of the calibration medium at the nozzle outlet under dynamic dispensing flow conditions is detected as the first temperature, and the oil temperature of the calibration medium under static steady-state conditions within the standard metal measuring vessel is detected as the second temperature. Based on the difference in heat exchange between the first and second temperatures, a calibration temperature difference characterizing the degree of thermal imbalance in the system is calculated. Based on the calibration temperature difference and the thermal expansion physical properties of the calibration medium, volume deviation caused by thermal effects is compensated for at the first calibration height to obtain the second calibration height. Based on the second temperature and the thermally compensated second calibration height, the indication error of a single calibration of the fuel dispenser is determined.

Description

[0001] This application is a divisional application of the invention patent with application number "202310491054.1", application date "May 4, 2023", and title "A method for calibrating a fuel dispenser, a computer storage medium, and an electronic device". Technical Field

[0002] This application belongs to the field of fuel refueling technology, and particularly relates to a fuel refueling machine calibration method, computer storage medium, and electronic equipment. Background Technology

[0003] When calibrating fuel dispensers on-site, the error of the indicated values ​​at each calibration point is usually calculated manually using a calculator or automatically using computer software. Manual calculation using a calculator has drawbacks such as high computational intensity and slow speed, while automatic calculation using computer software has limitations such as the limited scope of computer use due to explosion-proof requirements on-site, and the bulky nature of explosion-proof computers making them inconvenient for on-site use. Summary of the Invention

[0004] This application provides a fuel dispenser calibration method, a computer storage medium, and an electronic device to overcome the shortcomings of the prior art.

[0005] A method for calibrating a fuel dispenser, comprising:

[0006] Steps for collecting physical quantities of oil level: Obtain the calibration medium injected into the standard metal measuring vessel by quantitative injection, and collect the physical height reflecting the real-time liquid level position of the standard metal measuring vessel, which is recorded as the first calibration height. );

[0007] Multi-site thermodynamic parameter detection steps: Simultaneously detect the temperature at the oil gun outlet of the calibration medium under dynamic injection flow conditions as the first temperature ( ), and the temperature of the oil in the standard metal volumetric vessel under static steady-state conditions as the second temperature ( );

[0008] Heat transfer temperature difference characterization steps: Based on the first temperature ( ) and the second temperature ( The difference in heat exchange between the two systems was used to calculate the calibrated temperature difference, which characterizes the degree of thermal imbalance in the system. );

[0009] Nonlinear liquid level dynamic correction steps: based on the calibrated temperature difference ( The thermal expansion physical properties of the test medium and the calibration medium are matched with a preset calibration height correction relationship to adjust the first calibration height ( Compensation was applied to compensate for volume deviations caused by thermal effects to obtain the second calibration height. );

[0010] Error state determination steps: Based on the second temperature ( ) and the second calibration height after thermal compensation ( Matching the preset indication error mapping model, the indication error of a single calibration of the fuel dispenser is determined. ).

[0011] A computer storage medium storing a computer-executable program thereon, characterized in that the computer-executable program, when executed by a processor, implements the steps of any of the methods described in this application.

[0012] An electronic device includes a memory and a processor, the memory being used to store a computer-executable program and the processor being used to run the computer-executable program to implement the steps of any of the methods described in this application.

[0013] The fuel dispenser calibration method explicitly described in claim 1 of this application involves the following steps: acquiring a first calibration height (h) through a physical quantity acquisition step; obtaining a first temperature (tJ) at the nozzle outlet and a second temperature (tB) of the stationary fuel in a standard metal measuring vessel through a multi-site thermodynamic parameter detection step; calculating a calibration temperature difference (Δt) to characterize the degree of thermal imbalance in the system through a heat transfer temperature difference characterization step; performing a nonlinear liquid level dynamic correction step by matching a preset calibration height correction relationship based on the calibration temperature difference (Δt) and the thermal expansion physical properties of the test medium to compensate for the volume deviation caused by thermal effects on the first calibration height (h) and obtain a second calibration height (h'); and determining an error state by matching a preset indication error mapping model based on the second temperature (tB) and the thermally compensated second calibration height (h'). This technology directly determines the indication error (EV) of a single fuel dispenser calibration. It transforms the complex calculations required in the previous technology, such as heat compensation calculations and indication error solving, which involved manual calculations using a calculator on-site, into a standardized operation that directly matches a preset calibration height correction relationship with a preset indication error mapping model. This eliminates the need for tedious manual parameter input and calculations, directly solving the problems of high computational intensity and slow speed associated with manual calculations. Furthermore, this technology only requires physical quantity acquisition, temperature detection, and matching of preset relationships and models to complete calibration. It eliminates the need for automated calculations using computers or other electronic computing equipment in flammable and explosive calibration environments, completely avoiding the limitations imposed by explosion-proof requirements on computer use and eliminating the inconvenience of bulky explosion-proof computers for on-site use. Attached Figure Description

[0014] Figure 1 This is a flowchart illustrating a fuel dispenser calibration method provided in Embodiment 1 of this application.

[0015] Figure 2 This is a flowchart illustrating a fuel dispenser calibration method provided in Embodiment 2 of this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] Figure 1 This is a flowchart illustrating a fuel dispenser calibration method provided in Embodiment 1 of this application. Figure 1 As shown, it includes the following technically rigorous steps:

[0019] S101, Steps for collecting physical quantities of oil level;

[0020] Specifically, in the step of acquiring the physical quantity of oil level, a filling nozzle is used to quantitatively acquire the calibration medium, which is then injected into a standard metal measuring vessel. After filling is complete and the oil foam and bubbles in the standard metal measuring vessel disappear, the reading of the standard metal measuring vessel is read and recorded, that is, the physical height reflecting the real-time liquid level position of the standard metal measuring vessel is acquired. The scale graduation of the measuring neck of the standard metal measuring vessel corresponding to this physical height is the first calibrated height. The testing medium is the liquid fuel added to the vehicle by the fuel dispenser; for example, the liquid fuel is gasoline, light diesel oil, kerosene, etc.

[0021] S102, Multi-site thermodynamic parameter detection steps;

[0022] In the multi-point thermodynamic parameter detection step, the system thermal state is accurately captured by multi-point temperature monitoring: during the calibration medium filling process, the oil temperature under dynamic filling flow at the oil gun outlet, read when the thermometer reading stabilizes, is the first temperature. ); and after the filling is completed and the oil foam and bubbles in the standard metal measuring vessel disappear, measure and record the temperature of the oil in the standard metal measuring vessel under static steady state as the second temperature ( ).

[0023] S103, Characterization steps for heat transfer temperature difference;

[0024] In the heat transfer temperature difference characterization step, the first temperature is calculated ( ) and the second temperature ( The difference in heat exchange between the two is used to obtain the calibration temperature difference used to characterize the degree of thermal imbalance in the system. ),Right now: .

[0025] S104, Nonlinear liquid level dynamic correction steps;

[0026] Specifically, in the calibration height correction step, based on the calibration temperature difference ( The type of the test medium (i.e., the thermal expansion physical properties of the test medium) and the calibration height correction table are matched with a pre-established calibration height to adjust the first calibration height ( ) Implement volume deviation compensation caused by thermal effect to obtain the second calibration height ( The calibration height correction table (i.e., the two-dimensional parameter feature matrix) represents the calibration height correction value based on a mathematical model constructed according to the following physical constraint formula. Subject to the calibrated temperature difference ( The volume expansion coefficient of the test medium () ) and the volume verification results of the standard metal measuring instrument ( and Establishing relationships based on influence:

[0027]

[0028] In this mathematical model, This indicates the calibration height correction value, in units of... ; The coefficient of volumetric expansion of the test medium is expressed in units of 1000 ppm. ; This indicates the graduation volume of the measuring neck of a standard metal measuring instrument, in units of... ; Indicates the standard metal measuring instrument measuring neck scale (The height of the measuring neck scale of the standard metal measuring instrument corresponding to its nominal capacity) is located at the reference temperature. (In this embodiment) Set as The capacity at that time is expressed in units of 1. ; This indicates the first temperature, which is the oil temperature output by the flow measurement converter inside the fuel dispenser (represented by the oil temperature at the nozzle), in units of... ; This indicates the second temperature, namely the oil temperature inside the standard metal measuring vessel, in units of... ; This is a conversion constant for volume units.

[0029] S105, Error State Determination Steps.

[0030] In the error state determination step, based on the second temperature ( ) and the second calibration height after thermal compensation ( The value is matched with a pre-established indication error lookup table to determine the indication error of a single calibration of the fuel dispenser. The indicated error mapping model is constructed as a volume-error decoupling mapping operator under quasi-isothermal equilibrium, which is structured as a discretized state index table at the data structure level.

[0031] Optionally, in the calibration height correction relationship (parameter feature matrix), the calibration temperature difference ( The horizontal row (lateral working condition feature dimension) and the vertical row (vertical attribute feature dimension) of the calibration medium are used to jointly represent the calibration height correction value. Subject to the calibrated temperature difference ( The relationship between the test medium and the test medium.

[0032] Optionally, the dual-dimensional parameter feature matrix integrates an asymmetric compensation algorithm based on the energy flow vector direction. This algorithm identifies the first temperature ( ) and the second temperature ( The direction of heat transfer (i.e., the direction of energy flow vector) between the first temperature and the corresponding correction subset is adaptively retrieved to perform differential compensation. The correction subset includes a calibration height correction table (1) and a calibration height correction table (2). When the first temperature ( ) greater than or equal to the second temperature ( When the first temperature ( ), the calibration height correction table (1) (i.e., the positive temperature difference correction subset) is used; when the first temperature ( ) less than the second temperature ( When using the calibration height correction table (2) (i.e., the negative temperature difference correction subset), the calibration height correction table (1) and calibration height correction table (2) are as follows:

[0033] Positive Temperature Difference Correction Sub-table (1) Unit:

[0034]

[0035] Negative Temperature Difference Correction Sub-table (2) Unit:

[0036]

[0037] when At this time, it is equivalent to the fuel liquid injected into the standard metal measuring vessel during the fuel dispenser calibration process being unaffected by the ambient temperature, and equal to the fuel liquid temperature output by the flow measurement converter inside the fuel dispenser. That is, the system is in a quasi-isothermal equilibrium state, and the fuel liquid volume remains constant. According to the relevant formulas in the fuel dispenser calibration procedures, the fuel liquid in the standard metal measuring vessel at high temperature (… The volume needs to be corrected to match the output of the flow measurement converter inside the fuel dispenser at low temperature. The volume of ) is equivalent to the oil level remaining constant in a standard metal measuring vessel.

[0038] when At this time, it is equivalent to the fuel dispenser calibration process where the fuel injected into the standard metal measuring vessel is lower than the fuel temperature output by the flow measurement converter inside the fuel dispenser due to the influence of ambient temperature, resulting in a smaller fuel volume. The energy flow vector direction is heat dissipation from the medium to the environment. According to the relevant formulas in the fuel dispenser calibration procedure, the fuel in the standard metal measuring vessel at a low temperature ( The volume needs to be corrected to match the output of the flow measurement converter inside the fuel dispenser at high temperature. The volume of the volume is equivalent to the increase in the oil level in a standard metal measuring vessel due to thermal compensation caused by the expansion of the oil volume.

[0039] when At this time, it is equivalent to the fuel injected into the standard metal measuring vessel during the fuel dispenser calibration process being higher than the fuel temperature output by the flow measurement converter inside the fuel dispenser due to the influence of ambient temperature, resulting in an increase in fuel volume. The energy flow vector direction is heat transfer from the environment to the medium. According to the relevant formulas in the fuel dispenser calibration procedure, the fuel in the standard metal measuring vessel at high temperature ( The volume needs to be corrected to match the output of the flow measurement converter inside the fuel dispenser at low temperature. The volume of ) is equivalent to the decrease in the oil level in a standard metal measuring vessel due to the shrinkage of the oil volume.

[0040] The specific correction operation logic is as follows: when At that time, select the calibration height correction value according to the calibration height correction table (1). ),Right now , , No corrections are needed; when At that time, select the calibration height correction value according to the calibration height correction table (1). ),Right now , , ;when When selecting the calibration height correction value from calibration height correction table (2), ),Right now , , .

[0041] Optionally, the step based on the calibrated temperature difference ( The type of the calibration medium and the calibration parameters are matched with a pre-established parameter feature matrix to determine the first calibration height ( ). Corrections are made to obtain the second calibration height. )include:

[0042] Based on the calibrated temperature difference ( The system retrieves and matches the two-dimensional parameter feature matrix (calibration height correction table) based on the type of the calibration medium, and determines the calibration height correction value. );

[0043] According to the calibration height correction value ( ), through algebraic synthesis of linear operators, for the first calibration height ( The second calibration height is obtained by correcting the error. The corrected formula is: Second calibration height ( = First calibration height ( + Calibration height correction value ( ).

[0044] Optionally, the method further includes: based on the second temperature ( ) and the second calibration height ( The value is matched with the state index table in the pre-established indication error mapping model to determine the indication error of a single calibration of the fuel dispenser. The state index table (indication error lookup table) is characterized by a mathematical model of the following decoupling mapping operator, namely, in the quasi-isothermal equilibrium state ( Under the condition of ), the first calibration height ( Subject to the second temperature ( ), indication error of a single calibration of a fuel dispenser ( Establishment of a mapping relationship based on mutual interaction:

[0045]

[0046] In this model, This indicates the first calibrated altitude reading, in units of... ; This indicates the indicated volume of the fuel dispenser, in units of... ; Indicates the measuring instrument at the reference temperature (like The capacity verification value at that time, in units of ; The coefficient of thermal expansion of the measuring instrument material is expressed in units of 1000 ppm. ; This indicates the measured temperature of the oil in the measuring instrument, in units of... ; This represents the indication error to be solved, in units of... ; This indicates the graduated volume of the measuring instrument, in units of . ; This represents the base height constant corresponding to the nominal capacity of the measuring instrument, in units of... ; Used as a reference temperature point; These are the normalization operator constants; Unit conversion factor.

[0047] Optionally, the indication error of a single calibration of the fuel dispenser in the status index table ( The second temperature is arranged horizontally (indication error gradient). The temperature gradient is represented vertically by precisely defined retrieval nodes, which are used to jointly represent the current temperature gradient. At that time, the first calibration height ( Subject to the second temperature ( ) and the indication error of a single calibration of a fuel dispenser ( The relationship of influence.

[0048] Optionally, the state index table is as follows:

[0049] Status Index Table (Indication Error Lookup Table) Unit:

[0050]

[0051] The indication error lookup table (status index table) is based on The second calibration height is calculated based on the premise that... = First calibration height ( However, these two temperature values ​​may differ during the actual calibration process, at which point the second calibration height ( ) ≠ First calibration height ( Therefore, it is necessary to use a nonlinear liquid level dynamic correction model to adjust the first calibration height (). Corrections are made to obtain the second calibration height. And based on the second temperature ( ) and the second calibration height ( The data is matched with a pre-established status index table to retrieve the indication error of a single calibration of the fuel dispenser. ).

[0052] The following example illustrates the physical origin of the calculation formula (decoupling mapping operator logic) in the above embodiments of this application.

[0053] See Formula 1: The value measured by a standard metal measuring instrument at the first temperature ( Actual volume value under ) ,unit :

[0054]

[0055] See Formula 2: Indication error of a single calibration of a fuel dispenser ( ),unit :

[0056]

[0057] See Formula 3: Standard metal measuring instruments Lower standard volume ,unit :

[0058]

[0059] The first step is to make Substituting equation (3) into equation (1), we obtain equation (4):

[0060]

[0061] The second step is to transform equation (2) to obtain equation (5), and the specific process is as follows:

[0062]

[0063]

[0064] Third step, substitute equation (4) into equation (5) to obtain equation (6):

[0065]

[0066] Fourth, transforming equation (6) yields equation (7), which forms the basis for establishing the state index table:

[0067]

[0068] Fifth step, further transforming equation (7), we can obtain equation (8):

[0069]

[0070] When the calibration certificate shows the volume calibration result of the standard metal measuring instrument When it is an integer, that is, in equation (8) Then, equation (8) can be further transformed to obtain equation (9):

[0071]

[0072] Based on the actual condition of the fuel dispenser being inspected, the standard metal measuring instruments selected during the calibration process are generally 100L, 50L, and 20L. Taking the commonly used 50L standard metal measuring instrument as an example, the indicated error of a single calibration of a fuel dispenser at a certain interval is extracted ( ) and second temperature ( This will be illustrated using an example. When the calibration certificate shows the volume calibration result of a standard metal measuring instrument... When the result is an integer, a relevant table (status index table) is compiled according to formula (9). This table is used when the volume verification result of the standard metal measuring instrument in the verification certificate is... When the integer is not an integer, the relevant table is prepared according to formula (8).

[0073] The volumetric calibration results of the standard metal measuring instrument are as follows: ; ; Standard metal measuring instruments are made of stainless steel and have a coefficient of thermal expansion of [missing information]. According to equation (9), equation (10) can be obtained by calculation:

[0074]

[0075] The indication error of a single calibration of a fuel dispenser ( ) are arranged horizontally, the second temperature ( The table is arranged vertically, and based on formula (10), the above-mentioned indication error lookup table (state index table) is obtained.

[0076] When the test medium is gasoline, the coefficient of volumetric expansion When the diesel fuel is light diesel, the coefficient of volumetric expansion is... According to the definition of the coefficient of volumetric expansion, for every change in temperature... Gasoline volume change ( Volume change of light diesel oil ( ).

[0077] The volumetric calibration results of the standard metal measuring instrument are as follows: ; Therefore, it can be calculated that the change in oil level in a standard metal measuring vessel is... Oil volume change ,Right now ( ).

[0078] Therefore, it can be seen that, in terms of the change in oil level (corresponding to the scale graduations on the measuring neck of the standard metal measuring vessel), the change in temperature... Oil height change That is, gasoline is Light diesel oil is .

[0079] Using the calibrated temperature difference ( The horizontal row represents the test medium, while the vertical row represents the test medium, based on the physical constraint formula. Thus, the correction subsets (calibration height correction table 1 and correction table 2) in the aforementioned two-dimensional parameter feature matrix are obtained.

[0080] The following uses a specific scenario as an example to illustrate the fuel dispenser calibration method in the above embodiments of this application.

[0081] Example 1

[0082] The test medium is light diesel oil. After completing the above-mentioned steps S101 for collecting physical quantities of oil level and S102 for detecting multiple thermodynamic parameters, the first temperature is obtained ( )for First calibration height ( )for Second temperature ( )for .

[0083] Perform the heat transfer temperature difference characterization step S103 described above, calculate the system heat exchange difference, and thus obtain... .

[0084] Executing the above-mentioned nonlinear liquid level dynamic correction step S104, because The energy flow vector direction is heat transfer from the environment to the medium. The system automatically retrieves the negative temperature difference correction sub-table (2) in the parameter feature matrix for matching, in order to match the first calibration height ( Thermal compensation correction was performed: The calibration height correction value was determined by referring to the table. )for .

[0085] The specific algebraic composition correction method is: second calibration height ( = First calibration height ( + Calibration height correction value ( )= .

[0086] Further, the error state determination step S105 is executed, querying the state index table in the indication error mapping model, and determining the state based on the second temperature ( ) and the second calibration height after thermal compensation ( ),exist Find the closest physical characteristic value of height at the temperature node, and thus determine the corresponding indication error value. ):

[0087] Second temperature ( )for Second calibration height ( )for After searching the state index table, the temperature gradient is close to the height value. The corresponding retrieved indication error value ( )for .

[0088] The indication error value of this verification was precisely calculated by computer software. )for The queried value is very close to the exact calculated value.

[0089] Example 2

[0090] The test medium is gasoline. After completing the above steps of collecting physical quantities of oil level (S101) and detecting thermodynamic parameters at multiple points (S102), the first temperature is obtained. )for First calibration height ( )for Second temperature ( )for .

[0091] Performing the heat transfer temperature difference characterization step S103 described above yields the calibrated temperature difference characterizing the degree of thermal imbalance in the system. )= .

[0092] Executing the above-mentioned nonlinear liquid level dynamic correction step S104, because The energy flow vector direction is the heat dissipation from the medium to the environment. The system automatically retrieves the positive temperature difference correction sub-table (1) from the parameter feature matrix for matching: After looking up the table, the calibration height correction value ( )for .

[0093] Specific correction methods include linear operator superposition: second calibration height ( = First calibration height ( + Calibration height correction value ( )= .

[0094] Further, the error state determination step S105 is executed, the state index table is queried, and the second temperature ( ) and the second calibration height ( ),turn up Indication error values ​​corresponding to height feature nodes at similar temperatures ( ):

[0095] Second temperature ( )for Second calibration height ( )for After consulting the state index table, the closest height value under the corresponding temperature gradient is... That is, the retrieved indication error value ( )for .

[0096] The indication error value of this verification was precisely calculated by computer software. )for The query value and the calculated value are quite close.

[0097] By observing the indication error lookup table (state index table), it can be found that the second temperature ( The change in ) has little effect on the oil level, only Left and right, you can consider each interval The values ​​were determined, and the vertical columns of the indication error lookup table were arranged in accordance with the actual local verification conditions. The range was adjusted, and the horizontal row of the calibration height correction table was modified. Expand the range; look up the table horizontally based on the indication error. and vertical The corresponding height value is further calculated to determine each and each The height interval difference is estimated to correct the query results and improve accuracy.

[0098] Verification has shown that the error between the query value and the precise calculated value can be controlled within [a certain range]. Within [a certain range], relative to the maximum permissible error of the fuel dispenser. This error can be ignored. By mastering the application methods of this indication error mapping model and state index table, it is possible to quickly and accurately estimate the indication error of a single calibration of a fuel dispenser.

[0099] Based on the volume verification results of the standard metal measuring instruments in the verification certificate, calculate , The change in oil level corresponding to commonly used values ​​is used to help determine whether the indication error of the fuel dispenser has been adjusted properly after the flow measurement converter has been adjusted.

[0100] This application provides a computer storage medium storing a computer executable program, which is then run to implement the steps of any calibration method described in this application.

[0101] This application provides an electronic device, which includes a memory and a processor. The memory stores a computer-executable program, and the processor runs the computer-executable program to implement the steps of any calibration method of this application.

[0102] Figure 2 This is a flowchart illustrating a fuel dispenser calibration method provided in Embodiment 2 of this application. Figure 2 As shown, it includes:

[0103] The calibration medium is obtained quantitatively and injected into a standard metal measuring instrument. The reading of the standard metal measuring instrument is then determined to be the first calibration height. );

[0104] During the calibration medium filling process, the oil temperature at the oil gun outlet is determined to be the first temperature ( ), and after filling is completed, the oil temperature in the standard metal measuring vessel is determined to be the second temperature ( );

[0105] Calculate the first temperature ( ) and the second temperature ( The temperature difference between ) is used to obtain the calibrated temperature difference ( );

[0106] Based on the calibrated temperature difference ( The type of the calibration medium and the calibration parameters are matched with a pre-established parameter feature matrix to determine the first calibration height ( ). Corrections are made to obtain the second calibration height. );

[0107] Based on the second temperature ( ) and the second calibration height ( This is matched with a pre-established status index table to quickly retrieve the indication error of a single calibration of the fuel dispenser. ).

[0108] Here, the above Figure 1 The illustrated embodiment can be used as Figure 2 Exemplary description of the embodiments shown.

[0109] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0110] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0111] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for calibrating a fuel dispenser, characterized in that, include: Steps for collecting physical quantities of oil level: Obtain the calibration medium injected into the standard metal measuring vessel by quantitative injection, and collect the physical height reflecting the real-time liquid level position of the standard metal measuring vessel, which is recorded as the first calibration height. ); Multi-site thermodynamic parameter detection steps: Simultaneously detect the temperature at the oil gun outlet of the calibration medium under dynamic injection flow conditions as the first temperature ( ), and the temperature of the oil in the standard metal volumetric vessel under static steady-state conditions as the second temperature ( ); Heat transfer temperature difference characterization steps: Based on the first temperature ( ) and the second temperature ( The difference in heat exchange between the two systems was used to calculate the calibrated temperature difference, which characterizes the degree of thermal imbalance in the system. ); Nonlinear liquid level dynamic correction steps: based on the calibrated temperature difference ( The thermal expansion physical properties of the test medium and the calibration medium are matched with a preset calibration height correction relationship to adjust the first calibration height ( Compensation was applied to compensate for volume deviations caused by thermal effects to obtain the second calibration height. ); Error state determination steps: Based on the second temperature ( ) and the second calibration height after thermal compensation ( Matching the preset indication error mapping model, the indication error of a single calibration of the fuel dispenser is determined. ).

2. The method according to claim 1, characterized in that, In the aforementioned nonlinear liquid level dynamic correction step, the calibration height correction relationship is established based on a mathematical model composed of the following physical constraint formulas to determine the calibration height correction value ( ): ， in, This indicates the calibration height correction value, in units of... ; The coefficient of volumetric expansion of the test medium is expressed in units of 1000 ppm. ; This indicates the graduation volume of the measuring neck of a standard metal measuring instrument, in units of... ; Indicates the standard metal measuring instrument measuring neck scale (The height of the measuring neck scale of the standard metal measuring instrument corresponding to its nominal capacity) is located at the reference temperature. Capacity at time, in units of ; The first temperature represents the oil temperature at the output of the flow measurement converter, in units of... ; The second temperature indicates the steady-state temperature of the oil in the standard metal measuring vessel, and the unit is... ; This is the preset reference temperature; This is a conversion constant for volume units.

3. The method according to claim 2, characterized in that, The calibration height correction relationship is specifically manifested at the physical implementation level as a two-dimensional parameter feature matrix, wherein the calibration temperature difference ( The horizontal working condition feature dimension is used as the horizontal characteristic dimension, and the type of the test medium is used as the vertical attribute feature dimension to jointly define the calibration height correction value. Spatial distribution under different thermodynamic environments.

4. The method according to claim 3, characterized in that, The dual-dimensional parameter feature matrix integrates an asymmetric compensation algorithm based on the energy flow vector direction; the asymmetric compensation algorithm identifies the first temperature ( ) and the second temperature ( The direction of heat transfer between the two systems is determined by the adaptive retrieval of the corresponding correction subset to perform differentiated compensation during the dynamic evolution of the system from "heat dissipation from the medium to the environment" or "heat transfer from the environment to the medium".

5. The method according to claim 1, characterized in that, The nonlinear liquid level dynamic correction step specifically includes: Retrieve and match the two-dimensional parameter feature matrix to determine the calibration height correction value ( ); The first calibration height ( ) and the calibration height correction value ( Algebraic synthesis was performed to calculate the second calibration height ( ).

6. The method according to claim 5, characterized in that, The algebraic composition is performed according to the following linear operator: second calibration height ( = First calibration height ( + Calibration height correction value ( ).

7. The method according to claim 1, characterized in that, The indication error mapping model in the error state determination step is constructed as a volume-error decoupling mapping operator under a quasi-isothermal equilibrium state; the decoupling mapping operator characterizes the... Under the baseline operating conditions, the first calibrated height ( The deterministic mapping law in the fluid characteristic space, which is jointly affected by the deformation dimension of the measuring instrument material and the flow measurement deviation dimension.

8. The method according to claim 7, characterized in that, The mathematical logic of the decoupling mapping operator is established by the following mathematical model: ， in, This indicates the first calibrated altitude reading, in units of... ; This indicates the indicated volume of the fuel dispenser, in units of... ; Indicates the standard metal measuring instrument measuring neck scale The scale is at the reference temperature. The capacity verification value at that time, in units of ; The coefficient of volumetric expansion of the measuring instrument material, expressed in units of 1000 ppm. ; This indicates the measured temperature of the oil in the measuring instrument, in units of... ; This represents the indication error to be solved, in units of... ; This indicates the graduated volume of the measuring instrument, in units of . ; This represents the base height constant corresponding to the nominal capacity of the measuring instrument, in units of... ; Used as a reference temperature point; These are the normalization operator constants; Unit conversion factor.

9. A computer storage medium having a computer-executable program stored thereon, characterized in that, When the computer executable program is executed by a processor, it implements the steps of the method according to any one of claims 1-8.

10. An electronic device, characterized in that, The method includes a memory and a processor, the memory being used to store a computer-executable program and the processor being used to run the computer-executable program to implement the steps of the method according to any one of claims 1-8.

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