CN112461336A - Method for calibrating fuel tank volume meter of gas station - Google Patents
Method for calibrating fuel tank volume meter of gas station Download PDFInfo
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- CN112461336A CN112461336A CN202011269048.4A CN202011269048A CN112461336A CN 112461336 A CN112461336 A CN 112461336A CN 202011269048 A CN202011269048 A CN 202011269048A CN 112461336 A CN112461336 A CN 112461336A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000002828 fuel tank Substances 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 42
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- 239000000446 fuel Substances 0.000 claims description 15
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- 239000002184 metal Substances 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/0084—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume for measuring volume
Abstract
The invention discloses a method for calibrating a fuel tank volume meter of a gas station, which comprises the following steps: initializing oil tank data to be calibrated; after the oiling machine goes out of the gun, the data of the oil tank and the gun are recorded and stored; converting the actual oil quantity of the oil tank according to the gun outlet data and the temperature change; recording the actual oil quantity and liquid level height of the oil tank after the oil tank is converted and discharged from the gun for multiple times; and generating an oil tank volume table by an interpolation method according to the actual oil quantity and the liquid level height. The invention adopts the mode that the oil gun is used for oiling and discharging oil to calibrate the volume meter of the oil tank, thereby greatly improving the convenience of calibrating the volume meter of the oil tank; meanwhile, in the calibration process of the volume meter, the influence of the oil temperature on the volume is considered, the calibration error caused by the oil temperature change is overcome, and the calibration accuracy of the oil tank volume meter is improved.
Description
Technical Field
The invention relates to the field of gas station quantity management, in particular to a method for calibrating a fuel tank volume meter of a gas station.
Background
In the whole process of petroleum operation, the quantity management of oil products is very important work. The oil sales enterprises have double tasks and responsibilities for managing the quantity of oil products in the operation process. For the outside, the system is responsible for petroleum users, and the quantity of the system is strictly controlled, so that the transaction is reasonable and fair; for enterprises, the responsibility is also needed to be played on quantity change caused in the processes of sending, transporting, receiving, storing and the like of oil products, and the quantity change is controlled within a standard range as much as possible in the processes of sending, selling and storing.
In order to realize the fine management of oil product metering and accurately measure the volume of oil products in an oil tank, the key is to obtain an accurate comparison table, namely a volume table, of the liquid level and the oil volume of the oil tank. For many years, people try to solve the problem of the accuracy of the oil tank volume meter by adopting various methods, but due to the limitation of a metering method and metering equipment, a method which is safe, economical and practical and does not influence normal operation is not found. How to effectively solve the problem of oil tank volume table calibration becomes a very troublesome matter for each domestic oil product retail unit.
The method for detecting the volume table of the traditional oil tank in China is relatively more traditional. The method for calibrating the volume table of the horizontal metal can mainly comprises a geometric method and a volumetric method. The calibration of the oil tank volume meter by the metering department mainly adopts a volumetric method to ensure that the accuracy of the volume meter is higher. Volumetric methods are divided into a method for calibrating injection volume by measuring volume with a standard device and a method for calibrating injection volume by adopting a volume flowmeter.
Although the process of measuring the horizontal metal oil tank by adopting a geometric method is simple, the volume table of the oil tank is inaccurate due to the installation inclination and deformation after being pressed, and the used oil tank can be verified only under the safe condition after stopping operation, cleaning the tank and ventilating, so the verification period is long and the cost is high; the optical measurement method mainly comprises the measurement (a tomography scanner or laser scanning), and the method has the advantages that the tank structure, the oil inlet and outlet tank guide, the liquid level measuring device and the explosion-proof barrier net are arranged in the tank, so that the equipment cannot be accurately scanned, and the metering precision is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for calibrating the fuel tank volume meter of the gas station is provided, the temperature with complex operation and poor accuracy existing in the existing calibration method is improved, and the convenience and the accuracy of calibration of the fuel tank volume meter are improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for calibrating a fuel tank volume meter of a gas station comprises the following steps:
s1: filling oil into an oil tank to be calibrated, and initializing and recording the data of the oil tank at the moment; the oil tank data comprises an oil tank number, a liquid level height in the oil tank and an oil tank temperature;
s2: after the oiling machine is discharged, gun discharging data and oil tank data of the oiling gun after the oiling gun is discharged are collected and stored; the gun discharging data comprises a fuel gun number, gun discharging time, a pump number and a gun discharging temperature;
s3: calculating the actual oil output of the oil tank corresponding to the gun output pump number in the step S2 according to the gun output temperature recorded in the step S2 and the oil tank temperature in the step S1;
s4: repeating the steps S2-S3, and recording the actual oil quantity of the oil tank corresponding to the oil dispenser after the oil dispenser goes out of the gun for multiple times and the liquid level height corresponding to the oil tank;
s5: and generating a tank volume table through the actual oil quantity and the liquid level height of the tank after the gun is discharged for multiple times recorded in the step S4 by an interpolation method.
Furthermore, a code number metering threshold value is set for the initial value of the number of pumps before the oil gun is discharged and the variable value of the number of pumps after the oil gun is discharged, and when the code number metering threshold value is reached, the oil tank data and the discharge gun data are automatically recorded and stored for one time; when the number of the oil guns is multiple, the sum of the number change values of the oil guns is used as the number metering threshold value.
Further, the code number metering threshold is: 300 liters;
furthermore, a temperature change threshold value is set according to the gun outlet temperature change of the fuel gun, and when the temperature change threshold value is reached, the oil tank data and the gun outlet data are automatically recorded and stored once.
Further, the temperature change threshold is: 0.3 degrees celsius.
Further, the actual number of guns counted in the step S3 is calculated according to the following formula
VFruit of Chinese wolfberry＝(Vn-Vn-1)*[(1+ηOil*(TPot for storing food-TGun)]
Wherein, VFruit of Chinese wolfberryFor the actual oil production of the tank, VnFor the Nth number of fuel gun pumps, Vn-1Number of fuel gun pumps N-1 [ ]OilIs the expansion coefficient of the oil, TPot for storing foodIs the temperature of the tank, TGunThe nozzle exit temperature of the nozzle.
Further, the interpolation method in step S5 includes the following specific algorithm:
1) calculating the oil volume of each millimeter section in the standard section between two adjacent records according to the difference between the actual oil volume of the oil tank recorded twice and the corresponding oil tank liquid level height, wherein the calculation formula is as follows:
wherein, VmmVolume of oil per mm section, VdThe difference value of the oil quantity of the standard section is h, and the height difference of the liquid level in the standard section is h;
2) the volume of the oil tank corresponding to the liquid level height in the standard section being an integer millimeter is calculated through the volume of the oil mass in each millimeter section in the standard section, and the calculation formula is as follows:
y＝V0+Vmm×(x-x0)
wherein the volume of the oil tank obtained by y is in liters; v0The lower limit volume of the standard section is in liters; vmmIs the volume of oil per millimeter segment, x, of the scale segment0The lower limit height is millimeter, x is the liquid level height of the integral millimeter section, and the unit is millimeter;
3) repeating the steps 1) and 2) until the oil tank volume corresponding to the integral millimeter section liquid level height between all the adjacent recorded oil tank data and the gun discharge data is completed;
4) and (4) finishing all the calculated integral millimeter section liquid level heights and the corresponding oil tank volumes into a table to finish the calibration of the oil tank volume table.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts the mode that the oil gun is used for oiling and discharging oil to calibrate the volume meter of the oil tank, thereby greatly improving the convenience of calibrating the volume meter of the oil tank; meanwhile, in the calibration process of the volume meter, the influence of the oil temperature on the volume is considered, the calibration error caused by the oil temperature change is overcome, and the calibration accuracy of the oil tank volume meter is improved.
(2) In the process of calibrating the volume meter, the invention sets the code number metering threshold and the temperature change threshold for the single oil output in the process of discharging the oil gun out of the oil gun, and effectively increases the recording points in the process of marking the oil tank volume meter, thereby improving the accuracy of the interpolation value and further improving the accuracy of calibrating the volume meter.
Drawings
FIG. 1 is a flow chart of a calibration method of the present invention.
Fig. 2 is a relationship diagram of device connection in the embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in FIGS. 1-2:
the invention is based on the existing gas station's oil filling system to complete the marking of the gas station's tank volumetric table, the gas station's oil filling machine is connected to the oil server (or the oil filling machine is connected to the oil server by signal, for example, wireless transceiver modules are respectively added on the oil filling machine and the oil server, so as to achieve the data transmission purpose by using the wireless transceiver modules), thereby transmitting the self-output gun number and temperature value to the oil server after each gun output of the oil filling machine. The oiling machine is an oiling device which is connected to the oil tank and is qualified through the verification of a national authorized metering department, and the error rate of the adopted oiling machine is generally in a range of 1.5 per mill (the value can be any value, but the repeatability error is qualified), and the value is subjected to calculation; the oil product server is a computer server and is used for a data exchange center of an oiling machine, an oil tank and a liquid level meter, and the server can acquire the data of the equipment. The communication protocol between them is IFSF; the oil tank and the oil station are used for storing oil products, and are generally horizontal, and the volume is generally between 15000L and 50000L.
The liquid level height of each oil tank can be measured in real time through the liquid level meter, and after the oiling machine goes out of the gun each time, the liquid level meter measures the liquid level height of the oil tank and sends the liquid level height of the oil tank to the oil server.
The method for calibrating the oil tank volume table comprises the following steps:
filling oil tanks with a set value with oil, wherein the oil quantity in the oil tank is not less than 95% of the total quantity under normal conditions, and initializing oil tank data when all oil filling guns of the oil tank are in a gun hanging state; the oil tank data comprises an oil tank number, the height of the liquid level in the oil tank, the temperature of oil in the oil tank, reading time and the like, the height of the liquid level in the oil tank is measured by a liquid level meter arranged in the oil tank, and data detected by the liquid level meter is transmitted to an oil product server in a wireless or wired mode.
Step two, after the oil filling guns corresponding to the oil tank are discharged, gun discharging data are collected and stored, and the oil tank data at the moment are recorded and stored; the gun discharging data comprises a fuel gun number, gun discharging time, pump number and gun discharging temperature; gun discharging data such as gun number, gun discharging time, pump number, gun discharging temperature and the like of the refueling gun are also transmitted to the oil product server in a wireless or wired transmission mode.
The method comprises the steps that as the time of one gun discharging is long, the situation that more oil is discharged through a refueling gun occurs, the number of oil discharging amount pumps of the refueling gun is counted and recorded, and a number metering threshold is set; for example: the number of fueling guns in the tank was set to 300L. When the number of the pump discharging guns of each gun on the oil tank is more than or equal to 300L (reaching the number metering threshold value), the slice metering is automatically triggered.
In addition, in order to avoid errors caused by excessive temperature difference, the gun outlet temperature of the oil filling gun is monitored in real time, a temperature change threshold value is set for the temperature change, and when the temperature change threshold value is reached, the oil tank data and the gun outlet data are automatically recorded and stored for the first time; for example: the temperature difference of the fuel nozzle on the oil tank is set to ± 0.3 ℃. When the temperature difference of each gun on the oil tank is more than or equal to +/-0.3 ℃ (reaching a threshold value), slice metering is automatically triggered.
Step three, calculating the actual oil output quantity of the oil tank corresponding to the gun output pump code number in the step S2 according to the gun output temperature and the oil tank temperature recorded in the step; repeating the second step and the third step, and recording the actual oil quantity of the oil tank corresponding to the oiling machine after the oiling machine goes out of the gun for multiple times and the liquid level height corresponding to the oil tank; the method for calculating the actual oil quantity of the oil tank according to the oil temperature change comprises the following steps:
Vfruit of Chinese wolfberry＝(Vn-Vn-1)*[(1+ηOil*(TPot for storing food-TGun)]
Wherein, VFruit of Chinese wolfberryFor the actual oil production of the tank, VnFor the Nth number of fuel gun pumps, Vn-1Number of fuel gun pumps N-1 [ ]OilIs the expansion coefficient of the oil, TPot for storing foodIs the temperature of the tank, TGunThe nozzle exit temperature of the nozzle.
And step four, calculating and generating an oil tank volume table by adopting an interpolation method through the actual oil quantity of the oil tank and the liquid level height of the oil tank after the gun is discharged for multiple times recorded in the step four. The specific calculation method of the interpolation method comprises the following steps:
firstly, the oil volume of each millimeter section in each standard section is calculated by adopting the following formula, and the calculation formula is as follows:
wherein, VmmVolume of oil per mm section, VdThe difference value of the oil quantity of the standard section is h, and the height difference of the liquid level in the standard section is h;
then, the oil volume corresponding to the liquid level height in the standard section being an integer millimeter is calculated through the oil volume per millimeter section in the standard section, and the calculation formula is as follows:
y＝V0+Vmm×(x-x0)
wherein the volume of the oil tank obtained by y is in liters; v0The lower limit volume of the standard section is in liters; vmmIs the volume of oil per millimeter segment, x, of the scale segment0The lower limit height is millimeter, x is the liquid level height of the integral millimeter section, and the unit is millimeter;
repeating the steps 1) and 2) until the oil tank volume corresponding to the integral millimeter section liquid level height between all the adjacent recorded oil tank data and the gun discharge data is completed;
and (4) finishing all the calculated integral millimeter section liquid level heights and the corresponding oil tank volumes into a table to finish the calibration of the oil tank volume table.
The calibration method of the volume meter in the present invention is described by an example
Table 1 raw data acquisition record table
The column "number of dispensing guns" in table 1 is converted into the actual amount of fuel dispensed from the tank based on the temperature of the dispensing chamber of the fuel gun. The specific conversion method is the calculation method exemplified in the following table:
TABLE 2 actual oil content in tank
VFruit of Chinese wolfberry＝(Vn-Vn-1)*[(1+ηOil*(TPot for storing food-TGun)]
Wherein, VFruit of Chinese wolfberryFor the actual oil production of the tank, VnFor the Nth number of fuel gun pumps, Vn-1Number of fuel gun pumps N-1 [ ]OilIs the expansion coefficient of the oil, TPot for storing foodIs the temperature of the tank, TGunThe nozzle exit temperature of the nozzle.
Note: the unit of the number of pump codes (pump code reading) is L, the temperature is, the gasoline expansion coefficient: 0.0012, diesel expansion coefficient: 0.0009.
if continuous oil filling is carried out, when a gun is lifted and hung, the number of pumps, the liquid level height of the oil tank, the gun outlet and the temperature of the oil tank are read once; when the temperature change reached 0.3 ℃, the reading was immediately performed once.
TABLE 3 tank volume table corresponding volume calculation data table
The specific calculation method in the above table is:
the tank gauge is calibrated from a low liquid level to a high liquid level, so the calibration is started from the section of lowest oil height C92 to C91:
366 to 405 data segment
Interpolation value: F92/(C91-C92), preserving 2-bit precision;
namely: 604/(405.4-366.1) rounding to 15.37 preserves 2-bit precision.
The set height of the tank volume meter is that the scales of the tank meter are automatically calculated by rounding after five times and six times according to the calibration scales (one calibration scale is every 10 mm) within the height of 366 to 405;
thus, F106 equals 370, F107 equals 380, F108 equals 390, and F109 equals 400
Volume per scale of the tank gauge: then the following formula is followed:
G106＝D92+(F106-C92)*E106＝3918+(370-366.1)*15.37＝3978
G107＝D92+(F107-C92)*E106＝3918+(380-366.1)*15.37＝4132
G108＝D92+(F108-C92)*E106＝3918+(390-366.1)*15.37＝4285
G109＝D92+(F109-C92)*E106＝3918+(400-366.1)*15.37＝4439
the above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (7)
1. A method for calibrating a fuel tank volume meter of a gas station is characterized by comprising the following steps: the method comprises the following steps:
s1: filling oil into an oil tank to be calibrated, and initializing and recording the data of the oil tank at the moment; the oil tank data comprises an oil tank number, a liquid level height in the oil tank and an oil tank temperature;
s2: after the oiling machine is discharged, gun discharging data and oil tank data of the oiling gun after the oiling gun is discharged are collected and stored; the gun discharging data comprises a fuel gun number, gun discharging time, a pump number and a gun discharging temperature;
s3: calculating the actual oil quantity of the oil tank corresponding to the gun output pump number in the step S2 according to the gun output temperature recorded in the step S2 and the oil tank temperature in the step S1;
s4: repeating the steps S2-S3, and recording the actual oil quantity of the oil tank corresponding to the oil dispenser after the oil dispenser goes out of the gun for multiple times and the liquid level height corresponding to the oil tank;
s5: and generating a tank volume table through the actual oil quantity and the liquid level height of the tank after the gun is discharged for multiple times recorded in the step S4 by an interpolation method.
2. The method of claim 1, wherein the method further comprises the steps of: setting a code number metering threshold value according to the initial value of the number of the pumps before the oil gun is discharged and the variable value of the number of the pumps after the oil gun is discharged, and automatically recording and storing the oil tank data and the discharge data once when the code number metering threshold value is reached; when the number of the oil guns is multiple, the sum of the number change values of the oil guns is used as the number metering threshold value.
3. The method of claim 2, wherein the step of calibrating the fuel tank volume meter comprises: the code number metering threshold is as follows: 300 liters.
4. A method of filling station tank volumetric table calibration according to claim 1 or 2, characterized in that: the temperature change threshold is set according to the gun outlet temperature change of the oil filling gun, and when the temperature change threshold is reached, the oil tank data and the gun outlet data are automatically recorded and stored once.
5. The method of claim 4, wherein the step of calibrating the fuel tank volume meter comprises: the temperature change threshold is as follows: 0.3 degrees celsius.
6. The method of claim 4, wherein the step of calibrating the fuel tank volume meter comprises: the actual number of guns counted in step S3 is calculated according to the following formula
VFruit of Chinese wolfberry＝(Vn-Vn-1)*[1+ηOil*(TPot for storing food-TGun)]
Wherein, VFruit of Chinese wolfberryFor the actual oil production of the tank, VnFor the Nth number of fuel gun pumps, Vn-1Number of fuel gun pumps N-1 [ ]OilIs the expansion coefficient of the oil, TPot for storing foodIs the temperature of the tank, TGunThe nozzle exit temperature of the nozzle.
7. The method of claim 6, wherein the step of calibrating the fuel tank volume meter comprises: the interpolation method in step S5 includes the following specific algorithm:
1) calculating the oil volume of each millimeter section in the standard section between two adjacent records according to the difference between the actual oil volume of the oil tank recorded twice and the corresponding oil tank liquid level height, wherein the calculation formula is as follows:
wherein, VmmVolume of oil per mm section, VdThe difference value of the oil quantity of the standard section is h, and the height difference of the liquid level in the standard section is h;
2) the volume of the oil tank corresponding to the liquid level height in the standard section being an integer millimeter is calculated through the volume of the oil mass in each millimeter section in the standard section, and the calculation formula is as follows:
y＝V0+Vmm×(x-x0)
wherein the volume of the oil tank obtained by y is in liters; v0The lower limit volume of the standard section is in liters; vmmIs the volume of oil per millimeter segment, x, of the scale segment0The lower limit height is millimeter, x is the liquid level height of the integral millimeter section, and the unit is millimeter;
3) repeating the steps 1) and 2) until the oil tank volume corresponding to the integral millimeter section liquid level height between all the adjacent recorded oil tank data and the gun discharge data is completed;
4) and (4) finishing all the calculated integral millimeter section liquid level heights and the corresponding oil tank volumes into a table to finish the calibration of the oil tank volume table.
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| CN202011269048.4A CN112461336B (en) | 2020-11-13 | Method for calibrating filling station oil tank volume meter |
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| CN202011269048.4A CN112461336B (en) | 2020-11-13 | Method for calibrating filling station oil tank volume meter |
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| CN112461336A true CN112461336A (en) | 2021-03-09 |
| CN112461336B CN112461336B (en) | 2024-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116499544A (en) * | 2023-06-30 | 2023-07-28 | 广东润宇传感器股份有限公司 | Storage tank volume calibration method, system, electronic equipment and storage medium |
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| CN104614051A (en) * | 2014-12-17 | 2015-05-13 | 浙江工商大学 | Calibration method and device of oil tank loading table |
| CN107462299A (en) * | 2017-08-16 | 2017-12-12 | 浙江工商大学 | A kind of data processing method that oil tank volume list demarcation is carried out with integration |
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| US5665895A (en) * | 1995-06-02 | 1997-09-09 | Veeder-Root Company | Apparatus and method for calibrating a storage tank |
| CN102564536A (en) * | 2012-02-03 | 2012-07-11 | 中国石油化工股份有限公司 | Correction system and correction method for oil tank loading table |
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| CN116499544A (en) * | 2023-06-30 | 2023-07-28 | 广东润宇传感器股份有限公司 | Storage tank volume calibration method, system, electronic equipment and storage medium |
| CN116499544B (en) * | 2023-06-30 | 2023-09-22 | 广东润宇传感器股份有限公司 | Storage tank volume calibration method, system, electronic equipment and storage medium |
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