RU2241210C1 - Method for counting fuel flow and device for realization of said method - Google Patents

Abstract

FIELD: liquids mass measuring technologies.

SUBSTANCE: method includes bringing full distributed volume of fuel from reservoir to standard temperature as well as total of momentary volume shares of fuel sent to consumer. After comparing these volumes, a volume of fuel is sent to consumer matching full distributed volume of fuel from reservoir, while consumer pays for ordered amount of fuel respectively to its mass, denseness of which matches denseness of fuel at standard temperature. Also described is device for counting flow of fuel, including sensor of starting temperature of fuel and densitometer mounted in reservoir for storing fuel. Device contains relay device with pump mounted on its force main as well as fuel supply cutter, current fuel flow temperature converter, impulse volumetric counter as well as force block electrically connected to pump and fuel cutter. Device also includes electronic computer with microcontroller and its memory block, impulse former, shares corrector connected to temperature converter for current fuel flow and impulse volumetric counter connected to microcontroller, display panel. Additionally device has fuel flow set-point device, comparing block, controlling device electrically connected to force block, which is mounted in relay device, impulse adder, and set-point device for conditional-constant denseness.

EFFECT: higher efficiency.

2 cl, 2 dwg

Description

The invention relates to measuring the mass of liquids, in particular fuel sold to a consumer through a fuel dispenser (fuel dispenser) of a gas station.

A known method of accounting for fuel consumption, in which the mass fuel consumption is measured by using special mass flow meters (Ilyinsky V.M. Measurement of mass consumption. M: Energy, 1973, p.27). The introduction of mass meters simplifies the calculation with the consumer and accounting for fuel consumption.

The disadvantage of this method is the lack of reliable and inexpensive equipment for its implementation.

Also known is a device for metering fuel consumption, including an angular velocity sensor, an electronic calculator, a pulse counter, which is used as an integrating unit, pump and fuel dispenser (RU, patent of the Russian Federation No. 2153652, 02/11/1994, publ. 27.07.2000. ) This known device allows, without involving additional devices, to directly determine the mass flow rate of fuel supplied to the consumer.

The disadvantages of this device are the high cost of special mass flow meters (up to 5 thousand dollars) and the high cost of their operation, because the use of these mass flowmeters requires frequent verification and adjustment, which, each time, entails a halt to the fuel dispenser.

Also known is the closest to the claimed method of accounting for fuel consumption, in which a new portion of fuel is poured into the tank for storing it, the initial values of the density and temperature of the fuel in the tank are measured at the time of filling, and they are fixed in the electronic computer as constants, and also introduced into it value of fuel density at standard temperature, mass fuel consumption is calculated, and in the process of fuel dispensing, current values of temperature of dispensed fuel and electric pulses of volumetric count are measured the chicks corresponding to constant volumetric doses of the current fuel consumption are corrected by bringing them to standard temperature, and then these pulses are summed up and then all information is displayed, archived this data, linked to the date and time and, if necessary, removed from the archive to reader (Patent No. 2199091, prior. December 6, 2000, publ. February 20, 2003, BI No. 5.)

This method allows to increase the accuracy of recording the total mass fuel consumption through the throughput device while expanding the functionality: computer collection and processing of fuel consumption data, increasing the degree of data security due to the impossibility of unauthorized access to them without using a reader for diagnosing the throughput device. In addition, the method applies a temperature correction to the fuel density at the current flow rate by converting the current fuel density to standard.

The disadvantage of this closest to the claimed method of accounting for fuel consumption is the impossibility of taking into account the consumption of a given amount of fuel at standard temperature according to its mass, independent of the changing temperature and density of the fuel when it is dispensed.

It also reflects a device for accounting fuel consumption, including a sensor for the initial temperature of the fuel and a density meter installed in the tank for storing fuel; a throughput device with a pump installed on its discharge pipe, a fuel cut-off device, a temperature converter for the current fuel consumption, a volumetric meter; a power unit electrically connected to the pump and the fuel shutoff; an electronic calculator with a microcontroller and its memory unit, a pulse shaper, a dose corrector associated with the temperature converter of the current fuel consumption and a volume meter, connected, in turn, with the microcontroller; display panel.

The inventions solve the problem of creating a method of accounting for fuel consumption, embodied in a device that provides improved accuracy of accounting for fuel consumption and its vacation.

The technical result from the use of inventions is to create conditions for accurate metering of fuel consumption and its dispensing by creating a device that provides metering of the consumption of a given amount of fuel according to its mass, calculated independently of the changing temperature and density of the fuel during its dispensing.

The specified technical result is achieved by the fact that in the method of accounting for fuel consumption, in which a new portion of fuel is poured into the tank for storing it, the initial values of the density and temperature of the fuel in the tank at the time of filling are measured and fixed in an electronic computer as constants, and they are also introduced in it, the value of the density of the fuel at standard temperature, calculate the mass consumption of fuel, and in the process of dispensing fuel measure the current temperature of the dispensed fuel and electric impulses a lot of the counter corresponding to constant volumetric doses of the current fuel consumption is adjusted by bringing it to standard temperature, and then these pulses are summed up and then all information is displayed, archived this data, linked to the date and time and removed, if necessary, from the archive on the reader, ... the mass fuel consumption is calculated by multiplying the value of a given volume of fuel delivered by the value of the entered average standard density of this type of fuel, taking it for the estimated mass high fuel consumption with the consumer at standard temperature, and enter its value as a constant in the memory block of the microcontroller of the electronic computer, and then calculate and add to the memory block of the microcontroller the value of the total volumetric fuel consumption released from the tank by dividing the mass fuel consumption by the value the density of fuel in the tank after it is drained, after which the value of the total volumetric flow rate of fuel dispensed from the tank is calculated and entered into the memory block of the microcontroller a, reduced to standard temperature, by multiplying the total volumetric flow rate of fuel dispensed from the tank at the initial temperature and the bin of volumetric expansion of the fuel taking into account the temperature difference, and translate it into electrical pulses, each of which corresponds to one instantaneous dose of the volume of fuel dispensed through a pulse volume meter, and when releasing fuel, each instantaneous dose of a constant volume of the current fuel consumption passing through the volume meter and expressed in pulses lead to the expressed in pulses dose of the volume of current fuel consumption at standard temperature by multiplying the number of current pulses by the reciprocal of the volume expansion bin of the fuel, after which the pulses are added and formed, and then this sum of pulses is compared with the sum of pulses corresponding to the total volume flow discharged from the tank fuel brought to standard temperature, and, if they coincide, turn off the fuel supply to the consumer, while the value entered into the electronic computer is flat the fuel density at a standard temperature is chosen corresponding to the average standard density value of this type of fuel from the range of its densities at a standard temperature of 15 ° C, taken as a conditionally constant density and comparable to the mass of fuel contained in a unit of its volume, conventionally taken as a “liter of constant weight ”And which is the unit of account with the consumer per unit volume of fuel supplied.

The specified technical result is also achieved by the fact that in the device, as well as in the closest to it, containing a sensor for the initial temperature of the fuel and density meter installed in the tank for storing fuel; a flow device with a pump installed on its discharge pipe, a fuel cut-off device, a temperature converter for the current fuel consumption, a pulse volume meter; a power unit electrically connected to the pump and the fuel shutoff; an electronic calculator with a microcontroller and its memory unit, a pulse shaper, a dose corrector associated with the temperature converter of the current fuel consumption and a volume meter, connected, in turn, with the microcontroller; display panel, it additionally introduces a fuel consumption volume adjuster and a comparison unit connected to the display panel, as well as a control device electrically connected to the power unit installed in the throughput device, a pulse adder and a conditionally constant density adjuster associated with the first input microcontroller, the second input of which is connected to the initial temperature sensor, its third input is with a densitometer, its fourth input is with a pulse volumetric fuel consumption meter, its fifth input is with the output of the the fuel consumption volume dose indicator, and the sixth input of the microcontroller is connected to the output of the fuel consumption volume adjuster, and the first output of the microcontroller is connected to one of the inputs of the pulse adder, its second output is connected to one of the inputs of the fuel consumption volume dose adjuster, and the second input of the pulse adder with the output of the dose rate corrector for fuel consumption, and the only output of the pulse adder is connected to the input of the pulse shaper, the output of which is connected to the input of the comparison unit, and the second input of the comparison unit is connected to the output Setpoint fuel consumption amount and the output of the comparator is connected to the input of the power block.

The invention is illustrated by drawings, which depict:

figure 1 is a block diagram of a device for accounting fuel consumption;

figure 2 - schematic diagram of a device for accounting fuel consumption. The inventive method of accounting for fuel consumption is implemented as follows in the proposed device.

A device for metering fuel consumption (FIGS. 1 and 2) comprises a sensor for initial fuel temperature 1 and a densitometer 2 installed in a tank for storing fuel; a throughput device 3, which uses a fuel dispenser (fuel dispenser), with a pump 4 installed on its discharge pipe for supplying fuel from the tank, a fuel cut-off device 5, a temperature converter for current fuel consumption 6, a pulse volume meter 7 and a power unit 8 ; a control device 9 with a setpoint adjuster for the flow rate of dispensed fuel 10 located therein and a comparison unit 11 connected thereto, connected to the display panel 12; located in the operator’s electronic computer 13 with ports 14 and 15 for connecting various devices to them, such as a computer, cash register, archive, power supply with an external network (not shown).

The electronic calculator 13 (Fig. 2) includes a dose corrector for the fuel consumption volume 16 connected to the current temperature sensor 6 and the pulse volume counter 7; a conditional constant density adjuster 17, and a microcontroller 18 connected thereto, connected to a fuel initial temperature sensor 1, a density meter 2 and a pulse volume meter 7; a pulse adder 19, the inputs of which are connected to the outputs of the dose corrector for the volume of fuel consumption 16 and the microcontroller 18; a pulse shaper 20, connected by its input to the only output of the pulse adder 19, and by its only output, it is connected to the input of the comparison unit 11. The dose corrector for the fuel consumption volume 16 is connected by its input - output to the output - input of the microcontroller 18, respectively.

The inventive method of accounting for fuel consumption is implemented in the proposed device as follows.

First, fuel is poured into the tank for storage and 5-10 minutes after it is filled, the initial fuel temperature is measured by temperature sensor 1 and the initial density of the fuel in the tank is measured with a density meter 2. The obtained values are fixed as constants in the memory block of the microcontroller 18.

After that, a conditionally constant density of the fuel corresponding to the average standard density of the fuel from the range of its densities at a standard temperature of 15 ° C is set, for example, for AI 92-98 gasoline, the value of the average standard density is taken corresponding to 750.0 kg / m, and this density per mass of fuel contained in a unit of its volume, conventionally accepted as a “liter of constant weight” and being the unit of account with the consumer per unit volume of fuel supplied. This value is introduced through a conditioner of constant density 17 into the memory block of the microcontroller 18.

The consumer orders the operator a certain amount of fuel, which enters its value manually or through ports 14, 15 using a cash register (not shown) in the microcontroller 18.

The microcontroller 18 calculates the mass fuel consumption paid by the consumer, according to the formula:

M = V ₃ × P ₁₅ ,

where M is the mass fuel consumption paid by the consumer;

V ₃ - the fuel consumption volume specified by the consumer in arbitrary units “liters of constant weight”;

P _l5 - conditionally constant density corresponding to the average standard value of the density of the fuel from the range of its densities at a temperature of 15 ° C.

Then this value of the mass flow rate of fuel is introduced into the memory block of the microcontroller 18 of the electronic computer 13 as a constant value for this type of fuel.

After that, the value of the total volumetric flow rate of fuel dispensed from the tank is calculated and entered into the memory block of the microcontroller 18 according to the formula:

where M is the mass fuel consumption paid by the consumer;

V _pez is the total volumetric flow rate of fuel dispensed from the tank;

P _rez - the density of the fuel after it is discharged into the tank.

Then the value of the total volumetric fuel consumption dispensed at standard temperature is calculated and entered into the memory block of the microcontroller 18 according to the formula:

V _article = V _rez (1 + β Δ t),

where V _article is the total volumetric flow rate of fuel dispensed at standard temperature;

β is the coefficient of volume expansion of the supplied fuel;

Δ t = t -t _{CT pez,}

where t _CT - standard fuel temperature (15 ° C);

t _pez is the initial temperature of the fuel in the tank. The resulting total volumetric flow rate of fuel dispensed at standard temperature corresponds in mass to the volume of fuel with a conditionally constant density, it is expressed in conventional units “liters of constant weight”, adopted for the convenience of the consumer perceiving the fuel price for the usual set volume, instead of the price for its mass flow rate .

The number of electrical pulses corresponding to the total volumetric flow rate of fuel delivered from the tank, reduced to a standard temperature, is calculated by the formula:

where V _article is the total volumetric flow rate of fuel delivered from the tank, reduced to standard temperature;

θ _doses - the volume of the dose of fuel dispensed by the meter corresponds to 10 ml.

∑ η _st.imp - the number of electrical pulses corresponding to the total volume of fuel delivered from the tank and reduced to standard temperature.

After that, to dispense fuel to the consumer, a signal is sent to the power unit 8, which turns on the pump 4 and opens the fuel cut-off device 5, the fuel enters the consumer.

In the process of dispensing fuel to the consumer, the current values of the instantaneous doses of the fuel volumes are measured by a pulse volume meter 7, and the values of the current temperatures are measured by the current fuel consumption temperature transducer 6 and the obtained values are transmitted to the input of the dose corrector for the fuel consumption volume 16.

The value of each instant dose of a constant volume of current fuel consumption of 10 ml dispensed through a pulse volume counter 7 is converted into electrical pulses,

θ _doses = 10 ml = 1 pulse

After that, the number of pulses is calculated corresponding to the instantaneous volumetric dose of the current fuel consumption in pulses issued by the volume meter at pulses at current temperatures reduced to the standard temperature:

where ∑ η ₁₅ is the number of pulses corresponding to the released instantaneous volumetric dose of the current fuel consumption at standard temperature,

∑ η t is the number of pulses corresponding to the instantaneous issued doses of the fuel volume issued by the volumetric meter at the current temperature;

β is the coefficient of volume expansion of the supplied fuel;

Δ t = t -t _{tech CT,}

where t _CT - standard fuel temperature (15 ° C);

t _tech - current temperature of the released fuel.

After that, the electrical pulses of each instantaneous dose of the supplied fuel volume, reduced to the standard temperature, are sent to a pulse adder 19, in which they are summed and sent to a pulse shaper 20, which generates them into signals and sends them to a comparison unit 11, in which these signals are compared with the signals of the adjuster of the volume of fuel consumption 10. When the compared signals coincide, a command is sent to the power unit 8, which turns off the pump 4 and the fuel cut-off 5, cutting off the fuel supply to the consumer.

Thus, the proposed method and device allows, due to its distinctive features, to create conditions for accurate metering of fuel consumption and its dispensing by creating a device that records the consumption of a given amount of fuel according to its mass, calculated independently of the changing temperature and density of the fuel during its dispensing .

An analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information and identification of sources containing information about analogues of the inventions, made it possible to establish that the applicant did not find analogues characterized by features identical (identical) to all the essential features of the claimed inventions.

The definition from the list of identified analogues of the prototype allowed us to identify a set of significant, in relation to the perceived technical result, distinctive features set forth in the claims. Therefore, in our opinion, the claimed invention “Method of accounting for fuel consumption and a device for its implementation” meet the criterion of “novelty”.

The criterion of “industrial applicability” is confirmed by the fact that the proposed inventions with their new features have successfully passed factory tests.

Claims (2)

1. A method of accounting for fuel consumption, in which a new portion of fuel is poured into the tank for storing it, the initial values of the density and temperature of the fuel in the tank are measured at the time of pouring, and they are fixed in the electronic computer as constant, and the fuel density is entered into it at standard temperature, mass fuel consumption is calculated, and in the process of fuel dispensing, current values of the temperature of dispensed fuel and electric pulses of the volumetric meter corresponding to constant volumetric Deputy current fuel consumption, correct by bringing to standard temperature, and then sum these pulses and then display all the information on the display, archive these data, bind them to the date and time, and output, if necessary, from the archive to the reader, characterized in that the mass fuel consumption is calculated by multiplying the value of a given volume of supplied fuel by the value of the introduced average standard density of this type of fuel, taking it for the estimated mass fuel consumption with the consumer at a standard temperature, and its value is entered as a constant in the memory block of the microcontroller of the electronic computer, and then the value of the total volumetric flow rate of fuel dispensed from the tank is calculated and entered into the memory block of the microcontroller by dividing the mass flow rate of fuel by the value of the density of fuel in the tank after its discharge, after which the value of the total volumetric flow rate of fuel discharged from the tank, calculated to the standard rate, is calculated and entered into the memory block of the microcontroller temperature, by multiplying the total volumetric flow rate of fuel dispensed from the tank at the initial temperature with the bin of volume expansion of the fuel, taking into account the temperature difference, and translate it into electrical pulses, each of which corresponds to one instantaneous dose of the volume of fuel dispensed through the volumetric meter, and when fuel is dispensed, each instantaneous dose of a constant volume of fuel consumption passing through a volumetric meter and expressed in pulses leads to the dose of volume of the current p expressed in pulses fuel consumption at standard temperature by multiplying the number of current pulses by the reciprocal of the binomial volume expansion of the fuel, after which the pulses are summed and formed, and then this sum of pulses is compared with the sum of the pulses corresponding to the total volume flow of the fuel delivered from the tank, brought to standard temperature, and , when they coincide, the fuel supply to the consumer is turned off, while the value of the fuel density entered into the electronic computer at a standard temperature is chosen as corresponding to the average standard value of the density of this type of fuel from the range of its densities at standard temperature, taken as a conditionally constant density, and comparable to the mass of fuel contained in a unit of its volume, conventionally taken as a "liter of constant weight" and being the unit of account with the consumer for unit volume of fuel dispensed. 2. A device for accounting fuel consumption, including a sensor for the initial temperature of the fuel and a densitometer installed in the tank for storing fuel, a throughput device with a pump installed on its discharge pipe, a fuel cut-off device, a temperature converter for the current fuel consumption, a pulse volume meter, a power unit, electrically connected to the pump and the fuel shutoff, an electronic computer with a microcontroller and its memory unit, a pulse shaper, a dose corrector associated with a current flow temperature converter and a pulsed volumetric counter, connected, in turn, with a microcontroller, an indication panel, characterized in that it further includes a fuel consumption volume adjuster and a comparison unit connected to the indication panel, as well as a control device electrically connected to the power unit, which is installed in the pass-through device, a pulse adder and a conditionally constant density adjuster, connected to the first input of the microcontroller, the second input of which is connected to the sensor temperature, its third input is with a densitometer, its fourth input is with a volumetric meter of fuel consumption, its fifth input is with the output of the dose rate corrector, the sixth input of the microcontroller is connected to the output of the volumetric flow adjuster, and the first output of the microcontroller is connected to one of inputs of the pulse adder, its second output is connected to one of the inputs of the dose rate corrector, and the second input of the pulse adder is connected to the output of the dose corrector, and the only output of the pulse adder is connected to the input of the pulse shaper pulses, the output of which is connected to the input of the comparison unit, and the second input of the comparison unit is connected to the output of the master unit for the volume of fuel consumption and the output of the comparison unit is connected to the input of the power unit.

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