CN111003680B - Oil product profit and loss monitoring method and system - Google Patents

Oil product profit and loss monitoring method and system Download PDF

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Publication number
CN111003680B
CN111003680B CN201910574822.3A CN201910574822A CN111003680B CN 111003680 B CN111003680 B CN 111003680B CN 201910574822 A CN201910574822 A CN 201910574822A CN 111003680 B CN111003680 B CN 111003680B
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oil
real
time
tank
loss
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CN111003680A (en
Inventor
姜长中
肖一
孔朝晖
肖世
沈宗达
丁亚
夏云和
刘晓爽
邢本风
杨振
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Vader Road Service Station Equipment Shanghai Co ltd
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Vader Road Service Station Equipment Shanghai Co ltd
Jiwei Transportation Technology Beijing Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/42—Filling nozzles
    • B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines

Abstract

The invention relates to a method and a system for monitoring the profit and loss of oil products, wherein the method comprises the following steps: acquiring real-time inventory change of the oil tank, including acquiring oil inlet quantity of an oil product of the oil tank; acquiring real-time sales volume from an oil gas recovery monitoring system of one or more oil guns connected with an oil tank; therefore, the profit and loss of the oil products can be determined based on the real-time inventory change (including the oil inlet quantity) and the real-time sales volume of the oil tanks. The invention can obtain real-time oil product profit and loss, and has important significance for the operation and management of the gas station.

Description

Oil product profit and loss monitoring method and system
Technical Field
The invention relates to the technical field of oil gas, in particular to a method and a system for monitoring oil product profit and loss.
Background
Oil product marketing management is the core of daily operation of a gas station. Oil profit and loss are the basis for oil sales management. Theoretically, the number of oil products in a gas station should satisfy the following relationship:
D-S = Delta I (formula 1)
Wherein D is the oil inlet amount, S is the sales volume, and Delta I is the inventory variation. However, this is not the case. The difference value appears between the values, and the difference value is the profit and loss of the oil product:
v = Δ I-D + S (formula 2)
Wherein V is the oil product profit and loss. When V is + the oil loss and the benefit are surplus; when V is-it means that the oil gain is lost.
Along with the gradual application of the metering equipment of the gas station, the management of the inventory and the sales metering of the gas station becomes more and more refined, and the real-time acquisition of the quantity and the profit and loss of the oil products of the gas station is important. However, in the prior art, because real-time oil quantity change information in the refueling process cannot be obtained, the profit and loss can only be analyzed on the basis of single transaction quantity according to the change of the refueling transaction quantity and the oil volume of the oil tank. Since the transaction amount is typically several tens to hundreds of liters, it is highly likely that all refueling points connected to the same tank will be refueling at the same time, and thus it is possible that multiple transactions will be completed. At a busy gas station, the amount of fuel added during the period may be as much as thousands of liters, so real-time monitoring of the oil profit and loss is not possible at all.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method for monitoring the profit and loss of oil products, which comprises the following steps: acquiring real-time inventory change of the oil tank; obtaining real-time sales from an oil and gas recovery monitoring system of one or more oil guns; acquiring the oil inlet quantity of an oil product in an oil tank; thus, the oil product profit and loss determined based on the real-time inventory change (including oil product inlet quantity) and the real-time sales volume of the oil tank are realized.
The method as described above, wherein the oil input is the real-time oil input, wherein the oil profit or loss is determined using the following formula: v (t) = Δ I (t) -D (t) + S (t) wherein V (t) is real-time profit or loss; Δ I (t) is the real-time inventory variance; d (t) is real-time oil inlet amount; s (t) is real-time sales volume.
The method as described above, wherein the oil input is the primary oil input, wherein the oil profit or loss is determined using the following formula: v (t) = Δ I (t) -D + Sd + S (t) wherein V (t) is real-time profit or loss; Δ I (t) is the real-time inventory variance; d is the primary oil inlet amount; sd is sales volume during oil take, and S (t) is real-time sales volume.
The method as described above, further comprising: obtaining the real-time liquid level height of oil in the oil tank through a liquid level meter; and calculating the inventory change by using the tank capacity table passing through the real tank business standard tank based on the liquid level height of the oil product.
The method as described above, further comprising: and acquiring a temperature field in the oil tank by using a plurality of temperature sensors of the liquid level meter, and performing temperature compensation on inventory change.
The method as described above, further comprising: the oil gas recovery monitoring system obtains the flow pulse of an oil flow encoder by using an optical coupling mode; and calculating the real-time sales volume based on the accumulated value of the real-time flow of the oil product.
The method as described above, further comprising: real-time sales are temperature compensated based at least in part on a temperature sensor temperature of the flow transducer, an ambient temperature, or the ambient temperature and a tank temperature.
The method as described above, further comprising: and obtaining the real-time oil inlet amount through an oil product flowmeter or a liquid level meter.
The method as described above, further comprising: the oil feed rate is temperature compensated based at least in part on one or more of the temperature sensor temperature of the oil flow meter, the tank car temperature, the ambient temperature, or the oil tank temperature.
The method as described above, further comprising: and discovering the abnormal condition of the oil product based on the oil product profit and loss, wherein the abnormal condition is one or more of the drifting of a flowmeter of the oiling machine, the leakage monitoring of the oil tank, the oil pipe and the oiling machine, the unplanned oil inlet of the oil tank, the prevention of oil product theft and the cheating of the oiling machine.
The method as described above, further comprising: the oil recovery monitoring system utilizes the existing alarm function to alarm against the abnormal condition of the oil product.
According to another aspect of the present invention, an oil product profit and loss monitoring system is provided, comprising: an inventory module configured to obtain real-time inventory changes of the oil tank; a sales module configured to obtain real-time sales volumes from an oil and gas recovery monitoring system of an oil gun; and an oil profit-and-loss module configured to determine a real-time profit-and-loss of the oil based at least in part on the inventory change and the real-time fueling amount.
The system as described above, further comprising: an oil inlet module configured to obtain a real-time oil inlet of the oil tank; the oil profit-and-loss module is further configured to determine an oil profit-and-loss using the following formula: v (t) = Δ I (t) -D (t) + S (t) wherein V (t) is real-time profit or loss; Δ I (t) is the real-time inventory variance; d (t) is real-time oil inlet amount; s (t) is real-time sales volume.
The system as described above, further comprising: an oil-in-oil sales volume module configured to obtain a primary oil-in-oil volume of the oil tank; the oil profit-and-loss module is further configured to determine an oil profit-and-loss using the following formula: v (t) = Δ I (t) -D + Sd + S (t) wherein V (t) is real-time profit or loss; Δ I (t) is the real-time inventory variance; d is the oil inlet amount; sd is sales volume during oil take, and S (t) is real-time sales volume.
The system as described above, wherein the real-time inventory change of the tank is based on measurements of a level gauge in the tank.
The system as described above, wherein the oil gas recovery monitoring system obtains real-time sales via an oil flow encoder of an oil metering and control system optically coupled thereto.
The system as described above, wherein the real-time sales volume can be determined using the following formula:
Figure BDA0002111789920000031
wherein Si (t) is the real-time sales volume of the oil gun; f is the Pulse equivalent of an oil flow encoder of the oil gun, and Pulse is the number of pulses.
The system as described above, wherein the temperature compensation is performed for one or more of inventory change, real-time oil feed, real-time sales.
The system as described above, wherein the temperature compensation is performed for one or more of inventory change, primary feed, real time sales.
According to another aspect of the invention, a gasoline station is proposed, comprising: an oil tank equipped with a liquid level meter; one or more oil and gas recovery oil guns, wherein the one or more oil guns each include an oil and gas recovery monitoring system; and an oil profit-and-loss monitoring system as described in any one of the above.
The invention can obtain real-time oil product profit and loss, and has important significance for the operation and management of the gas station.
Drawings
Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of an oil profit-and-loss monitoring system of a gasoline station according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of an oil metering and control system coupled with an oil and gas recovery monitoring system according to an embodiment of the present invention; and
FIG. 3 is a flow chart of a method for real-time monitoring of oil profit and loss according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural, logical or electrical changes may be made to the embodiments of the present application.
The invention provides a scheme for comparing a real-time oil flow pulse signal of an oil gas recovery online monitoring system with the variable quantity of an oil tank inventory, thereby realizing the real-time monitoring of oil loss and benefit. The technical scheme of the invention does not need to carry out complicated transformation on the existing gas station, and has the advantages of low cost, accurate monitoring and the like.
Fig. 1 is a schematic view of an oil profit-and-loss monitoring system of a gasoline station according to an embodiment of the present invention. As shown, the gasoline station comprises: an oil tank 200 and a plurality of vapor recovery fuel guns connected to the oil tank 200. An oil product metering and control system of the oil gun controls the filling and metering of oil products. The vapor recovery monitoring system recovers and monitors vapor from a refueling gun.
As shown, the gasoline station includes a level console 101 for obtaining inventory in the tank 200 and an online monitoring console 102 for implementing vapor recovery monitoring and alarm. In some embodiments, the oil product profit-and-loss monitoring system of the present invention can be used as an independent control platform, or can be integrated with the level meter console 101 or the online monitoring console 102. In some embodiments, where the level gauge console 101 and the online monitoring console 102 are integrated, the oil profit-and-loss monitoring system of the present invention may be integrated with both. In the example shown in FIG. 1, the oil profit-and-loss monitoring system of the present invention is integrated with an online monitoring console 102. This may better utilize the alarm, etc. functionality of the online monitoring console 102.
In some embodiments, the oil profit-and-loss monitoring system includes an inventory module 103, a sales module 104, and an oil profit-and-loss module 105. The inventory module 103 obtains real-time inventory changes from the tank 200. In some embodiments, the inventory change is from a measurement of the amount of oil in the tank, such as a level gauge. Alternatively, the inventory module 103 may also obtain inventory changes from the level gauge console 101. The sales module 104 obtains real-time sales volume from the oil and gas recovery monitoring system. The oil profit-and-loss module 105 determines a real-time profit-and-loss of oil based at least in part on real-time inventory changes from the oil tank 200 and real-time fueling quantities from the oil and gas recovery monitoring system.
As shown, a level gauge 202 is installed on the oil tank 200 for measuring the height of the oil level in the oil tank 200. In some examples of level gauges, the level gauges are capable of measuring the level of the oil and the height of the water level, and even the density of the oil, in real time. The volume change of the oil in the tank can be obtained according to the tank capacity table of the conversion from the height to the volume of the oil level of the oil tank.
In some embodiments, the level gauge of the tank 200 is a level gauge. In order to realize accurate oil product loss and benefit monitoring, the accuracy of liquid level height measurement of the probe is very critical. A common tank for petrol stations is a 5 metre long 3 metre diameter tank. Thus, in the neutral position, a level height error of 1mm will give a volumetric measurement error of 15 litres of oil. The magnetostrictive liquid level meter has the advantages of high precision, high reliability, simple and convenient installation and maintenance and the like. The accurate probe at present can realize the theoretical distance of +/-0.50 mm.
In some embodiments, the tank contents are passed through a real tank business label tank. The real tank measurement is relatively reliable because the tank will deform after being filled with oil underground, and this deformation may change over time. The real tank measurement can be divided into an off-business tank and a business standard tank. The former uses standard tank or large flow meter, the latter is realized by cooperating with the flow meter of the fuel charger. Since the latter oils have much smaller variation particle sizes (gasoline less than 100 liters) than the former (2000 liters is generally used), more accurate calibration of the tank capacity can be achieved.
The liquid level meter console 101 can obtain the volume of the oil in the oil tank 200 in real time according to the liquid level height of the oil measured by the liquid level meter in real time and the tank capacity meter. And the volume change can be obtained by the change of the liquid level height of the oil product, so that the inventory change is reflected.
In the prior art, the online monitoring console 102 is a part of an oil gas recovery monitoring system, and is responsible for transmitting oil gas recovery real-time and alarm information of each oil gas recovery oil engine end and console end of a gas station to an environmental protection department and/or a related service and management department of a petroleum company. In one aspect of the present invention, the online monitoring console 102 is further configured to determine oil profit and loss based on the functionality of the online monitoring console 102. Therefore, the oil recovery monitoring system can realize real-time oil product loss monitoring by utilizing the online monitoring console 102 of the existing oil gas recovery monitoring system without additionally adding monitoring equipment and circuits.
In some embodiments, as shown, the oil metering and control system includes: the oil gas recovery refueling machine gun comprises an oil recovery refueling machine gun 300, an oil flow converter 301, an oil control valve 302, an oil flow encoder 303 and a hydraulic control board 304. The oil tank 200 includes a submersible pump 201. An oil control valve 302 is connected to the submersible pump 201 to obtain oil from the oil tank 200. An oil flow converter 301 is connected between the fuelling machine gun 300 and an oil control valve 302. The hydraulic control board 304 controls the oil control valve 302. Oil flow encoder 303 meters the amount of oil flowing through oil flow inverter 301.
The oil gas recovery monitoring system comprises an oil gas recovery control panel 311, an online monitoring control panel 312, an oil gas recovery pump 313 and a gas flow converter 314. The oil gas recovery control panel 311 controls the oil gas recovery pump 313 to recover oil gas from the fueling gun 300. The gas flow rate converter 314 is used to meter the recovered oil gas. The online monitoring control board 312 obtains the actual flow rate of the fuel oil of the fuel dispenser and the recovery amount of the fuel gas recovery system of the fuel filling channel in real time and sends the actual flow rate of the fuel oil of the fuel dispenser and the recovery amount of the fuel gas recovery system of the fuel filling channel to the online monitoring console 102. The console 102 monitors and manages the ratio of the two in real time. If the predetermined range is exceeded, the console 102 will perform an early warning or alarm. While generating the alarm, console 102 locks the fueling function of the fuel dispenser and sends the alarm information to the relevant regulatory authorities.
In some embodiments, the hydrocarbon recovery monitoring system simultaneously monitors the pressure at the tank farm discharge to monitor the state of depletion of the hydrocarbons. The pressure transducer 315 and the gas pressure transducer 207 installed near the evacuation port 206 are used for monitoring the gas resistance of the oil gas recovery pipeline and the pressure in the tank, and can be selected and matched according to the actual situation.
In some embodiments, one fuel tank is connected to multiple fuel dispensers. The plurality of fuel dispensers include respective vapor recovery monitoring systems. These hydrocarbon recovery monitoring systems are connected to a common online monitoring console 102. In some embodiments, the functions of the level console 101 and the online monitoring console 102 may be integrated in the same console to perform both functions.
The invention determines the profit and loss of the oil product by using the actual flow of the oil product of the oiling machine acquired in real time in the oil gas recovery monitoring system. For real-time oil profit and loss, the following formula is satisfied:
V(t)＝ΔI(t)-D(t)+S(t) (3)
wherein t is time; Δ I (t) is the real-time inventory variance; d (t) is real-time oil inlet amount; s (t) is real-time sales volume. As mentioned above, the real-time inventory variation Δ I (t) can be obtained by the liquid level meter; the oil flow (namely the real-time sales volume) of the oiling machine can be obtained in real time through the oil gas recovery monitoring system.
In some embodiments, to more accurately obtain the real-time flow rate of the fuel oil of the fuel dispenser, the online monitoring control board 312 directly obtains the flow Pulses (Pulses) from the oil flow rate encoder, and calculates the real-time flow rate of the oil by using the flow Pulses:
Figure BDA0002111789920000071
wherein F oil flow meter and encoder pulse equivalent, such as 3.7854 liters/1000 pulses. And calculating the oil flow of a fuel gun on the oil tank through the real-time accumulated value of the pulses from the oil flow encoder.
FIG. 2 is a schematic diagram of an oil metering and control system coupled to an oil recovery monitoring system according to one embodiment of the present invention. As shown, on the oil metering and control system side, a pulse signal from the oil flow encoder passes through the light emitting diode 320 causing the light emitting diode to illuminate. On the side of the oil gas recovery monitoring system, the light emitted by the light emitting diode 320 is received by the photodiode 322, so that the output of the pulse signal is realized at the output end through optical coupling. The optical coupling mode has the advantages of convenience and accuracy, and no interference to an oil product metering and controlling system.
In some embodiments, the oil intake module is configured to capture an oil intake of the tank. The oil inlet D of the oil tank corresponds to the oil unloading process. As shown, the oil carrier 204 feeds oil into the tank 200 through the oil discharge port 203 via the oil gauge 205. During the unloading process, the accuracy of the oil flow meter is not lower than that of the oil flow converter 301, and D (t) can be given by the oil discharge flow meter.
However, the oil discharge process is an extremely complex but relatively short time process. Thus, in some aspects of the invention, instead of simulating the unloading process, it is assumed that there is no gain in oil during this period other than tanker unloading and tanker bleeding. In this way, the oil inlet amount D can be obtained by the accumulated value of the oil level meter or the level meter 202. Thus, the profit and loss of the oil can be written as the following formula
V (t) = delta I (t) -D + Sd + S (t) t epsilon non-oil-discharging process (5)
Wherein, in the formula (4), D is the total oil discharge amount; sd is the total sales during oil unloading;
Figure BDA0002111789920000081
t is the total time of oil discharge.
In order to more accurately obtain the oil gains, the effect of temperature changes on the oil volume must be considered. In some embodiments, the temperature compensated changes Δ I, D, and/or S are used to calculate the amount of the loss of V20 (oil volume at 20 ℃).
In some embodiments, the level gauge in the tank is equipped with a temperature sensor. For example, the liquid level meter can measure the temperature of five points with different heights, and the temperature compensation of the delta I is realized according to the temperature gradient of the oil product. In some embodiments, temperature compensation for D (t) is achieved using a temperature sensor of the oil flow meter. And D (t) temperature compensation is carried out by utilizing the temperature in the oil transportation vehicle or the ambient temperature under the condition that the oil product flowmeter is not provided with a temperature sensor. However, the temperature compensation of D is relatively complicated due to the temperature inside the tanker, the length of the oil discharge pipe, and the oil discharge speed. Therefore, in some embodiments, the temperature compensation of D is realized through the multipoint temperature measured by the liquid level meter, the oil temperature resting time and the change characteristics of the temperature field.
In some embodiments, temperature compensation of S is achieved by providing a temperature sensor in the hydraulic system of the fuel dispenser. This type of fuel dispenser is common in cold regions or in internet of things based fuel dispensers. If the temperature in the fuel dispenser is not available, in some embodiments, temperature compensation for S (t) is achieved using ambient temperature. However, in this case, there is a certain error, and the smaller the difference between the ground temperature and the tank temperature is, the higher the oil transaction frequency is, and the more accurate the calculation result is. In some embodiments, the temperature compensation of S (t) is achieved based on the temperature field distribution of the ground temperature and the tank temperature.
An example of monitoring real-time oil losses is given in the table below.
Figure BDA0002111789920000091
Wherein the dark numbers represent measurements, including: oil height (from level gauge), tank temperature (from temperature sensor of level gauge), oil discharge amount (from oil flow meter), tank temperature of vehicle tank (from ambient temperature), pulse increment number (from oil flow encoder), temperature of flow meter (from temperature sensor of oiling machine hydraulic system); light color numbers represent calculated values, including stock, 20 ℃ stock change, 20 ℃ oil discharge amount accumulation, sales increase, and 20 ℃ sales increase; the total sales and real-time profit and loss of dark numbers are the monitoring results of the system.
It can be seen from the above figures that in some embodiments of the oil product profit and loss monitoring system of the present invention, the oil gas recovery online monitoring and the oil tank liquid level measuring device are combined to realize the real-time monitoring of the oil product profit and loss without adding or changing any hardware. Furthermore, by a temperature compensation technology and an oil temperature estimation method, the oil damage and benefit real-time monitoring method can achieve very high precision, so that the requirement of fine management of a gas station can be completely met. Furthermore, the oil profit and loss real-time monitoring result of the invention can realize the timely discovery and alarm of the oil abnormal conditions of the gas station, wherein the abnormal conditions include but are not limited to the flow meter drift of the oiling machine, the leakage monitoring of the oil tank, the oil pipe and the oiling machine, the unplanned oil intake of the oil tank, the oil theft prevention and the cheating of the oiling machine.
FIG. 3 is a flow chart of a method for real-time monitoring of oil profit and loss according to an embodiment of the present invention. As shown in the figure, the real-time monitoring method 300 for oil profit and loss includes the following steps:
in step 310, real-time inventory changes for the tanks are obtained. In some embodiments, the real-time level of the oil in the oil tank is obtained by means of a level gauge, preferably a magnetostrictive level gauge. Inventory changes are calculated using a tank volumetric table (preferably via a real tank business standard tank) based on the level of the oil. In some embodiments, a plurality of temperature sensors of the level gauge are used to obtain a temperature field in the tank and to temperature compensate for inventory changes.
At step 320, a real-time sales volume for one or more oil guns is obtained. In some embodiments, the real-time flow rate of oil from the oil guns is obtained by an oil and gas recovery monitoring system of one or more oil guns. And calculating the real-time sales volume based on the accumulated value of the real-time flow of the oil product. In some embodiments, the oil gas recovery monitoring system obtains the flow pulse of the oil flow encoder by means of optical coupling, so as to obtain the real-time oil flow. In some embodiments, temperature compensation is performed for real-time sales volumes. For example, real-time sales are temperature compensated based at least in part on a temperature sensor temperature of the flow transducer, an ambient temperature, or an ambient temperature and a tank temperature.
In step 330, the oil inlet amount of the oil tank is obtained. In some embodiments, the real-time oil intake of the tank oil is obtained. For example, the real-time oil feed rate is obtained by real-time variation of an oil product flow meter (preferably a high-precision flow meter) or a liquid level meter. In some embodiments, the oil inlet of the tank after oil discharge is obtained. For example, the oil inlet amount of the oil tank after oil discharge is obtained through an oil flowmeter or a liquid level meter. In some embodiments, the oil feed is temperature compensated. For example, the oil feed rate is temperature compensated based at least in part on one or more of a temperature sensor temperature of the oil flow meter, a tanker truck temperature, an ambient temperature, or a tank temperature.
At step 340, oil profit and loss are determined based at least in part on the real-time inventory changes, the real-time sales volume, and the oil feed volume. In some embodiments, the oil profit and loss conforms to the following equation:
V(t)＝ΔI(t)-D(t)+S(t) (3)
in some embodiments, the oil profit and loss conforms to the following equation:
v (t) = Δ I (t) -D + Sd + S (t) t ∈ non-oil-discharge process (5).
In some embodiments, there is further included step 350 of discovering oil anomalies based on oil gains and losses. These abnormal conditions include, but are not limited to, fuel dispenser flow meter drift, tank, tubing and dispenser leak monitoring, tank unplanned refueling, prevention of oil theft, and dispenser cheating.
For example, if oil profit is found to be continuously increasing or decreasing by a small amount during refueling, it may be that the fuel dispenser flow converter is drifting such that the real-time sales of oil is not in line with reality. Of course, fuel dispenser cheating can also cause the real-time sales of oil to be inconsistent with reality. Through the inspection to the tanker aircraft, can in time discover the problem. If a continuous increase or decrease in oil gain is found, then there may be leakage from the tanks, pipes and dispensers. Leakage from the tanks, pipes and dispensers is found to be important for the management of the service station by oil losses. If a large increase in inventory occurs, it may be that the tank is not scheduled to be filled. This is very important to improve oil quality and enhance service station management. While a large reduction in inventory may be the result of oil theft.
In some embodiments, step 360 is further included for alarming for oil product abnormal conditions. In the embodiment, for the abnormal condition of the oil product, the alarm of the abnormal condition can be conveniently realized by utilizing the existing alarm function of the oil gas recovery monitoring system.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.

Claims (16)

1. A method of monitoring oil gain and loss, comprising:
acquiring real-time inventory change of the oil tank;
acquiring real-time sales volume from an oil gas recovery monitoring system of one or more oil guns connected with an oil tank, wherein the oil gas recovery monitoring system acquires flow pulses of an oil flow encoder in an optical coupling mode; calculating real-time sales volume based on the accumulated value of the real-time flow of the oil product;
acquiring oil inlet quantity of an oil tank; and
an oil gain determined based at least in part on oil inlet volume, real-time sales volume, and real-time inventory changes of the oil tank;
when the oil inlet amount is the real-time oil inlet amount, determining the oil profit and loss by using the following formula:
V(t)＝ΔI(t)-D(t)+S(t)
wherein V (t) is real-time profit and loss; Δ I (t) is the real-time inventory variance; d (t) is real-time oil inlet amount; s (t) is real-time sales volume.
2. The method of claim 1, wherein when the oil input is a primary oil input, wherein the oil gain is determined using the following formula:
V(t)＝ΔI(t)–D+Sd+S(t)
wherein V (t) is real-time profit and loss; Δ I (t) is the real-time inventory variation; d is the primary oil inlet amount; sd is sales during the oil draw, and S (t) is real-time sales.
3. The method of claim 1, further comprising: obtaining the real-time liquid level height of oil in the oil tank through a liquid level meter; and then calculating the stock change by using the liquid level of the oil product through the tank capacity table of the real tank business standard tank.
4. The method of claim 3, further comprising: and acquiring a temperature field in the oil tank by using a plurality of temperature sensors of the liquid level gauge, and carrying out temperature compensation on inventory change.
5. The method of claim 1, further comprising: temperature compensation is performed on the real-time sales volume based at least in part on one or more of a temperature sensor temperature of the flow transducer, an ambient temperature, and a tank temperature.
6. The method of claim 1, further comprising: and obtaining the real-time oil inlet amount through an oil product flowmeter or a liquid level meter.
7. The method of claim 6, further comprising: the oil feed rate is temperature compensated based at least in part on one or more of the temperature sensor temperature of the oil flow meter, the tank car temperature, the ambient temperature, or the oil tank temperature.
8. The method of claim 1, further comprising: and finding out the abnormal condition of the oil product based on the profit and loss of the oil product, wherein the abnormal condition is one or more of the drifting of a flowmeter of the oiling machine, the leakage monitoring of the oil tank, the oil pipe and the oiling machine, the unplanned oil inlet of the oil tank, the prevention of the theft of the oil product and the cheating of the oiling machine.
9. The method of claim 8, further comprising: the existing alarm function of the oil gas recovery monitoring system is utilized to alarm against the abnormal condition of the oil product.
10. An oil profit-and-loss monitoring system comprising:
an inventory module configured to obtain real-time inventory changes of the oil tank;
a sales module configured to obtain a real-time sales volume from an oil gas recovery monitoring system of the oil gun, wherein the oil gas recovery monitoring system obtains the real-time sales volume through an oil flow encoder of an oil metering and control system optically coupled thereto; and
an oil profit-and-loss module configured to determine a real-time profit-and-loss of an oil based at least in part on inventory changes and a real-time fueling amount;
further comprising: an oil inlet module configured to obtain a real-time oil inlet of the oil tank; the oil profit-and-loss module is further configured to determine an oil profit-and-loss using the following formula:
V(t)＝ΔI(t)-D(t)+S(t)
wherein V (t) is real-time profit and loss; Δ I (t) is the real-time inventory variance; d (t) is real-time oil inlet amount; s (t) is real-time sales volume.
11. The system of claim 10, further comprising: the oil inlet module is configured to obtain the primary oil inlet of the oil tank; the oil profit-and-loss module is further configured to determine an oil profit-and-loss using the following formula:
V(t)＝ΔI(t)–D+Sd+S(t)
wherein V (t) is real-time profit and loss; Δ I (t) is the real-time inventory variation; d is the primary oil inlet amount; sd is sales volume during oil take, and S (t) is real-time sales volume.
12. The system of claim 10, wherein the real-time inventory change of the tank is based on measurements of a level gauge in the tank.
13. The system of claim 10, wherein the real-time sales volume can be determined using the following formula:
Figure FDA0003844236410000031
wherein Si (t) is the real-time sales volume of the oil gun; f is the Pulse equivalent of an oil flow encoder of the oil gun, and Pulse is the number of pulses.
14. The system of claim 10, wherein temperature compensation is performed for one or more of inventory variance, real-time oil feed, real-time sales.
15. The system of claim 10, wherein temperature compensation is made for one or more of inventory variation, oil feed, real time sales.
16. A gasoline station, comprising:
an oil tank equipped with a liquid level meter;
one or more oil and gas recovery oil guns, wherein the one or more oil guns each include an oil and gas recovery monitoring system; and
the oil profit and loss monitoring system of any one of claims 10-15.
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