SU1117653A1 - Device for calculating mass of petroleum and petroleum derivatives in reservoirs - Google Patents

Abstract

A device for calculating the mass of oil and petroleum products in reservoirs containing two switches, the first switch, the first analog-to-digital converter, the first reversible 1st counter, two memory blocks, two memory blocks of constants, the first adder, a digital-analog converter, a divider, a block determining the parcel number, including adder, register, permanent memory node, counter, sign definition node, AND element, command code decoder and square pulse generator, control unit, including the generator orp clock pulses, shaper packs of rectangular pulses, two deshators, a command address counter, three triggers, three one-shooters, a fixed memory node and a tank number counter, the outputs of which are bits and the information output of the fixed memory node control units are connected to the command code of the first and second switches, the first and second memory blocks, the first and second memory blocks of constants and the decoder of the command code, the output of the adder is connected to the first information inputs of the register and the voltage divider In addition, to the information input of the first memory block and to the output of the device, the inputs cyi iaTopa are connected respectively to the information outputs of the first memory block, the second switch and the second constant memory block, the information input of which is connected to the information memory of the second memory block, information the inputs of the first memory block of the constants and the second memory block are connected to the outputs of the counter bits, the output of the first memory block of the constants is connected to the input of a digital-to-analog converter, the output of which is connected to the second Eye information input voltage divider, the output of which is connected to the first Od information input of the first switch key, the second information input O9 of which is connected to the output of the first switch, the information inputs of which are information inputs of the device, the output of the first switch is connected to the information input of the first analog digital converter, the output of which is connected to the counting run of the first reversible counter, the outputs of which bits are connected to the first rpynncrii information s inputs vtorogo- switch input of the first installation reversing ELAPSED

Description

ka is connected to the output of the first one-shot, the control inputs of the reverse of the first switch and the first. the reversible counter is connected to the zero gate of the first grigger, the control input of the start of the first anti-digital converter is connected to the second input of the one-oscillator, the control input of the start of the voltage divider is connected to the output of the first desh (yrator, information input of which is connected to the information output the node of the permanent memory of the control unit, the address input of which is connected to the output of the command address counter, and the control input - with the unit output of the second trigger, the single input of which is connected to The output of the second decoder, informational inputs of which are connected respectively to the bits of the counter of the tank number, the counting input of which, the inputs of the generator of the rectangular pulse pack, the second one-oscillator and the counting input of the first trigger, are connected to the output of the clock generator of the generator of the rectangular pulse generator : connected to the counting input of the counter, address, command, the unit of the first trigger is connected to the counting input of the third trigger, the unit and zero output of which is connected to Respectively to the inputs of the third and first one-shot, the OUTPUT of the second adder of the block determines the number of the area connected to the second information input of the register and the input of the sum sign determining node whose output is connected to the first input of the element And

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The swarm input of which is connected to the output of the generator of rectangular pulses, the output of the AND element is connected to the clock input of the register and to the counting input of the counter, the inputs of the summatr of the section number determining unit are connected respectively to the registers and the node of the permanent memory of the section number determining unit, the outputs of bits the counter is connected to the address input of the host memory of the block for determining the area number, the control of which input is connected to the output of the code decoder of the command code, characterized in that, in order to To do this, a second analog-to-digital converter, a reversible counter and a switch, the first information input of which is connected to the output of the first switch, the second information input is connected to the output of the voltage divider, the output of the second switch is connected to the information input of the second analog-digital converter, the output which is connected to the counting input of the second reversing-. A counter whose outputs of bits are connected to the second group of information inputs of the second switch, the setup input of the second reversible counter is connected to the output of the third one-oscillator, the single output of the first trigger is connected to the control inputs of the reverse of the second switch and the second reversible counter, the control start input the second analogue-qi}) of the level converter is connected to the output of the second one-shot.

The invention relates to computational and information-measuring technology and can be used in quantitative accounting systems for petroleum products using the piezometric method of weighing liquids in tanks.

A device of quality accounting is known, containing sensors and

: a special calculator to provide information about the pressure of a liquid as a mass of liquid l.

The disadvantage of such a quantitative metering device is its complexity.

The closest in technical essence to the invention is a device that contains 3, a pressure sensor, a two-way input switch, a key, a filter, an analog-digital converter, a digital signal switch, a reversible meter, a register, memory, digital control. The second pulmonary modulator, the stroke of which is connected to the second input of the key, as well as the reference voltage block, connected through the analog signal switcher to the second input of the switch, the correction signal setting unit in, connected to a digital signal switchboard, a code comparison circuit whose inputs are connected to a reversing meter and an initial meter, and an output to an input of a synchronization unit that controls the operation of switches, a switch, a pulse width modulator, and a reverse However, the known device has insufficient speed of calculating the mass with a large number of serviced tanks. The aim of the invention is to increase speed. The goal is achieved in that a device containing two switches, a first switch, a first analog-digital converter, a first reversible counter, two memory blocks, two memory blocks of constants, a first adder, a digital-analog converter, a voltage divider, a number determination unit plot, which includes the second adder, register, first permanent memory node, counter, summation sign node, And element, code command decoder, and square pulse generator, control unit, including generator actuating pulses, shaper packs of direct coal pulses, two decoders, a command address counter, three triggers, three single vibrators, a second fixed memory node, and a tank number counter, the outputs of which bits and the information output of the second fixed memory node are connected to inputs command code of the first and second switches, | first and second memory blocks of the first and second memory blocks to 34 stantas and decoder command codes; the output of the first adder is connected to the first information inputs of the register and the voltage divider and, to the information input of the first memory block of the device output, the inputs of the first adder are connected, respectively, to the information outputs of the first memory block; the second switch and the second memory block of constants, the information input of which is connected to the information output of the second memory block, the information inputs of the first memory block of constants and the second memory block are connected to the outputs of the counter bits, the output of the first memory block of constants is connected to the digital-analog input the converter, the output of which is connected to the second information input of the voltage divider, the output of which is connected to the first information input of the first switch, the second information input of which connected to the output of the first switch, the information inputs of which are the information inputs of the device, the output of the first switch connected to the information input of the first analog-to-four converter, the output of which is connected to the counting input of the first reversible counter, the outputs of which bits are connected to the first group of information inputs the second switch, the setup input of the first reversible counter is connected to the output of the first one-shot, the control inputs of the reverse of the first switch and the first reversible counter is connected to the zero output of the first trigger; the control input for starting the first analog-digital converter is connected to the output of the second one-oscillator; the control input for starting the voltage divider is connected to the output of the first decoder, the information input of which is connected to the information output of the second node This control unit, whose address input is connected to the counter of the command address counter, and the control input, to the e 91th output of the second flip-flop, whose single input is It is connected to the output of the second decoder, the information inputs of which are connected respectively to the outputs of the counter bits of the tank number, the counting input of which, the inputs of the BTOpOiTO single-pulse rectangular pulse packet input generator and the counting input of the first TpHrrgjp a are connected to the output of the clock pulse generator, and the output of the first TpHrrgjp a generator is connected to the output of the clock pulse generator; connected to the counting input of the command address counter, the single output of the first trigger is connected to the counting input of the third tri, the unit and zero outputs of which are connected Connected respectively to the inputs of the third and first mono-Vibrators, the output of the second block of the block for determining the area number is connected to the second information input of the register and to the Input of the node for determining the sign of the symbol, whose output is connected to the first input of the And element, the second input of which is connected to the output of the square pulse generator , the output of the element I is connected to the clock input of the register and to the counting input of the counter, the inputs of the adder of the block for determining the number of the section | constant memory area determining unit number bit counter outputs are connected to the address rows. The second analog-to-digital converter, a reversible counter and a switch, the first information input of which is connected to the output of the first switch, the second information input is connected are entered into the input of the first node of the permanent memory of the determination unit, the number of the control section whose input is connected to the output of the command code decoder. to the output of the voltage divider, the output of the second switch is connected to the information input of the second analog-digital converter, the output of which is connected to the counting input of the second D The counter counter, whose discharge outputs are connected to the second group of information inputs of the second switch, the setup input of the second reversible counter is connected to the output of the third one-oscillator, the single output of the first tractor is connected to the control inputs of the reverse of the second switch and the second reversible counter, at the start launch input the second analog-to-digital Converter connected to the output of the second one-shot. FIG. I shows the scheme of the device; in fig. 2 is a block diagram of determining the area number; on fng. 3 is a control block diagram; in fig. A temporary diagram of the device. The device (Fig. 1) contains pressure sensors 1, switch 2, switches 3 and 4, analog-digital converters 5 and 6, reversible counters 6 and 7, switches 9, control unit 10, voltage divider II, memory block 12 ty, digital-to-analog converter 13, adder 1A, block 15 of memory constants, block 6 of memory constants, block I7 of determining the section number, block 18 of memory. The block for determining the number of a plot (Fig. 2) contains an adder 19 ,. fixed memory node 20, summation sign determining node 2, register 22, counter 23, element 24, generator 25 rectangular pulses, decoder 26. The control unit (.fig.C) contains generator 27 clock pulses, shaper 28 packs rectangular pulses, the counter 29 of the address of the commands, the node 30 of the permanent memory, the counter 31 of the tank number, the decoders 32 and 33, the triggers 34-36 and the one-shot 37-39. The device works as follows. In the first cycle, the control unit 10 exposes a code command that is received by the switch 2. D The code command field is broken so that one part carries information about the number of the tank being serviced, the second determines the choice of the unit being operated, one third prescribes the specified operation (reading, writing, etc.). Decryption of the command code is carried out using decoders (not shown) installed in each block to which these commands are assigned. The switch 2 connects the output of the first pressure sensor 1 to the input of the switch 3, by means of which the sensor signal is supplied to the analog-digital converter (ADC) 5. Reversible counter 7 is configured in the add mode and the ADC 5 is started. A digital measurement of the sensor signal is made. The measurement result, 4x7, is the first counter 7, in accordance with the codes of the block 10 through the switch 9 is fed to the adder 14 and gave successively recorded in the voltage divider reg, the register of the block number 17 and the first cell of the memory 12 . The dependence of the quantity of the product in the reservoir on the hydrostatic and laziness of the liquid column has the form of a piecewise linear function. The ordinates of the approximation nodes of this function can & 1t are determined by the stant values from the calibration table for a given reservoir, and the number of approximation sites corresponds to the number of reservoir tracks (equal to 8). The number of the approximation work area is determined using block 1 In the illustrated embodiment, block 17 uses a sequential method of comparing the result codes of the analog-to-digital conversion of the signals recorded in register 22 and the value of the corresponding ordinates of the approximation nodes stored in the fixed memory node 20 . The values of these ordinates are successively subtracted from the result recorded in register 22 until the code sign at the output of the adder 19, determined by the 1st using node 21, becomes negative or equal to zero. According to this feature, element AND 24 blocks the access of pulses from geyerator 25 to the input of counter 23. The latter fixes the number of the working section of the fitting. The code of the approximation section number from the output of block 17 is rewritten into the first memory cell of the 18-m block and is fed to the inputs of the memory block 15, in which the constants are stored, zakacmcie the angular coefficient of the slope of this approximation segment. At the same time, the first tank code is supplied to the other inputs of the IS block. The selected value of the slope of the section of the device with the output of the block 15 is fed to the input of the digital-to-analog converter (DAC) 13. The output analog signal of the DAC 13 is fed to the input of the divider 11, at the output of the last image 3 S. voltage is proportional to the code recorded in divider 1I register and the output voltage of DAC 13. In the second cycle, the divider 1 signal is fed to the first channel and the second channel is simultaneously (the output signal of the second sensor is simultaneously. Measurement result by the second channel (ADC) B. Of the second sensor signal from the output of the reversible counter 8, where it is recorded in the direct code, through the switch 9 through the adder 14 is recorded in the second memory cell of block 12, the register of the divider 11 and fed to the input of block 17. 17 code number the corresponding plot of approximation is rewritten into the second memory cell of block 18 and simultaneously enters the inputs of block 15. The selected slope of the section dp of the second tank from the output of block 15 is fed to the input of the DAC 13. At the output of the divider I, a voltage proportional to the code written in the register divider 11, and the output voltage of the DAC I3, corresponding to the value of the selected slope of the approximation area. The result of the measurement of the first channel (Xi 5) is subtracted in the reversible counter 7 from the previously recorded measurement result of the first sensor. The difference obtained at the output of the counter 7 is fed by the switch 9 to the adder 14, where it is combined altogether with the code 9M extracted from the first memory cell of the block 12. Thus, at the output of the adder, the result of the first approximation dp of the signal of the first sensor is obtained, which is -. is written to the first memory location of block 12. Reversible counter 7 is reset to zero. In the next cycle, the output of the third sensor is connected to the first, and the signal of the splitter 11 to the second measurement channel. The course of further operations is repeated, as in pre; The previous tact is from Rene. The number of measurement cycles in the first correction cycle depends on the number of maintenance tanks. By the time of the end of the survey, all pressure sensors in the memory cells of unit 12 (where n is the number of tanks the first approximation results are stored. While in the n and cell the result of the direct measurement of the signal of the nth sensor is recorded without correction). The .h +1 cycle for the first sensor begins the second correction cycle, and for the sensor only the first cycle ends.The output of the first sensor is connected to the first measurement channel, while the second channel is supplied with the output voltage of the divider 11 proportional to the code recorded in the h-th cell of the block 12 and the analog expression of the slope of the working section of the approximation of the n-th reservoir. In the first step of the second correction cycle, the result of the repeated measurement of the signal of the first sensor carried out by the ADC 5 remains in transmitting it to the adder 14. The control unit 10 issues a command to read the result of the first pass for the signal of the first sensor from the first memory cell of the block 12. The extracted code goes to the adder 14 and is written to the register. Next, the block number 18 is retrieved from the memory of block 18, which in the previous correction cycle belonged to the result of direct measurement of the signal of the first sensor, the extracted code is fed to the inputs of block 16, the last code to the adder 14 corrects that the beginning of this approximation does not correspond to its calculated value. The algebraic sum of the result of the first approximation and the correction code obtained at the output of the adder 14 and constituting the first corrected measurement result is entered into block 17, which specifies the number of the approximation area for the signal of the first sensor. The refined number is entered into the first memory cell of block 18 and into block 15. From the output of the last block, the selected value of the slider and the refined approximation part of the day of the first tank is fed to the input of the DAC 13. A voltage proportional to the code is generated at the output of the divider. recorded to the first cell of block 12 and to the output voltage of the D / A converter 13. The determination of the result of the first approximation for the signal of the pt sensor is performed in the same way as in the previous cycles of the first correction cycle. In the next cycle of the second correction cycle, the output signal of the divider 11 is supplied to the first measurement channel, and the signal of the second sensor is connected to the second channel. The course of further operations in the second and subsequent correction cycles is performed in a similar way. At the same time, unlike the first cycle, the result of re-measuring the pressure sensor signals from reversible counters is not rewritten, the corrected measurement result is determined as the sum of the result of the next approximation and the corresponding Amendment code extracted from block 16, and the approximation plot number is updated according to the value of the corrected result . On the falling edge of the pulse generator 27, the period of which determines the duration of the measuring cycle, the driver 28 outputs a packet of pulses arriving at the input of the counter 29. In accordance with the state of the counter 29 and the trigger 34, marking the transition from the first to the second and subsequent correction cycles , the outputs of node 20 are sequentially outputted by code.1 of commands for performing the described operations by blocks 2,9,12,15,16,17 and 18. Since these instruction-codes arrive at specified blocks simultaneously, the command recognition The corresponding block is carried out using decoders. To obtain the N-ro corrected measurement result in devices with iterative error correction and, in particular, in a known device, it is necessary to spend 2N + 1 measurement steps to interrogate each tank, i.e. total (2N-H) h cycles (n is the number of tanks b) Realization of the invention allows, other things being equal, to reduce the total number of wasted cycles to N b +1. 111 Thus, the application of the proposed device will provide at least twice the speed in comparison with the known. Since the errors of the used A / D converters 5 and 6 are corrected in the proposed device, the simplest and therefore reliable converters can be used as the latter. Thus, the introduction of the second measurement channel will not result a significant complication of its scheme. We compare the invention with commercially available equipment Radius. The taxi kit's taxi kit allows you to poll 10 tanks in 180 seconds with an error of 0.05%. This only determines the information about the hydrostatic pressure of the product in the tank. show that to make a measurement with the same accuracy, the proposed device requires 3-5 correction cycles. If the time of one measurement cycle is 40 ms (such a duration is determined by the requirement to ensure the noise immunity of measurements), then the sampling time of 10 tanks will be determined from the calculation: {5 cycles -10 tanks + 1), X 40 ms "2.04 s. As can be seen with the same accuracy and the number of tanks served, the response speed of the intended device is higher. The invention makes it possible to directly determine the mass code of the product stored in the tank.

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Claims (1)

DEVICE FOR CALCULATING OIL AND OIL PRODUCTS IN TANKS, containing two switches, a first switch, a first analog-to-digital converter, a first reversible counter, two memory blocks, two constant memory blocks, a first adder, a digital-to-analog converter, a voltage divider, a unit for determining the section number comprising an adder, a register, a permanent memory node, a counter, a node for determining the sign of the sum, an AND element, an decoder of the command code and a rectangular pulse generator, a control unit including a generator p clock pulses, square-wave burst shaper, two decoders, instruction address counter, three triggers, three single-vibrators, read-only memory unit and tank number counter, the bit outputs of which and the information output of the read-only memory unit of the control unit are connected to the inputs of the command code of the first and the second switches, the first and second, memory blocks, the first and second memory blocks of constants and the decoder of the command code, the adder output is connected to the first information inputs of the register and voltage divider, to and the formation input of the first memory block and the output of the device, the adder inputs are connected respectively to the information outputs of the first memory block, the second switch and the second memory block of constants, the information input of which is connected to the information output of the second memory block, the information inputs of the first memory block of constants and the second block memory 'are connected to the outputs of the bits of the counter, the output of the first block of constants is connected to the input of the digital to analog converter, the output of which is connected to the second inform the voltage divider input, the output of which is connected to the first information input of the first switch, the second information input of which is connected to the output of the first switch, the information inputs of which are information inputs of the device, the output of the first switch is connected to the information input of the first analog-digital converter, the output of which is connected to the counting input the first reversible counter, the outputs of the discharges of which are connected to the first group of information inputs of the second comm Ator, adjusting input of the first reversing COUNT> ka is connected to the output of the first one-shot, the control inputs of the reverse of the first switch and the first. of the reverse counter are connected to the zero output of the first trigger, the control input of the start of the first analogue? · the pogo-digital converter is connected to the output of the second one-shot, the control input of the start of the voltage divider is connected to the output of the first decoder, the information input of which is connected to the information output of the constant memory node of the control unit whose address input is connected to the output of the command address counter, and the control input is connected to the unit output of the second trigger, the unit input of which is connected to the output a second row decoder, data inputs. which are connected respectively to '> the outputs of the digits of the counter of the tank number, the counting input of which, the inputs of the shaper of the bundle, is rectangular; pulses, the second one-shot and the counting input of the first trigger are connected to the output of the clock pulse generator, the output of the square-pulse burst former _: connected to the counting input of the counter, the command address, the single output of the first trigger is connected to the counting input of the third trigger, the output and zero outputs of which are connected respectively to the inputs of the third and first single vibrators, 1 the output of the second adder of the unit for determining the number of sections is connected to the second information input of the register and to the input of the node the sign of the sum whose output is connected to the first input of the AND element, 11F7653 the swarm input of which is connected to the output of the square-wave pulse generator, the output of the And element is connected to the clock input of the register and to the counting input of the counter, the inputs of the adder of the section number determination unit are connected respectively to the outputs of the register and the read-only memory node of the section number determination unit, the counter discharge outputs are connected to the address input of the node остоян read-only memory of the unit for determining the number of the section, the control input of which is connected to the output of the decoder of the command code, characterized in that, in order to In terms of performance, a second analog-to-digital converter, a reverse counter and a switch are introduced into it, the first information input of which is connected to the output of the first switch, the second information input is connected to the output of the voltage divider, the output of the second switch is connected to the information input of the second analog-to-digital converter, the output of which connected to the counting input of the second reversible counter, the discharge of which is connected to the second group of information inputs of the second switch the input of the second reversible counter is connected to the output of the third one-shot, the single output of the first trigger is connected to the control inputs of the reverse of the second switch and the second reversible counter, the control input of the start of the second analog-to-digital converter is connected to the output of the second one-shot. 1.;