SU847056A1

SU847056A1 - Liquid flow meter

Info

Publication number: SU847056A1
Application number: SU762312636A
Authority: SU
Inventors: Николай Михайлович Грибков; Анатолий Александрович Гаришин; Олег Павлович Босый; Надежда Юрьевна Довбенко
Original assignee: Предприятие П/Я А-3759
Priority date: 1976-01-12
Filing date: 1976-01-12
Publication date: 1981-07-15

Description

(54) УСТГОЙСТВО ДЛЯ ИЗМЕРЕРШЯ РАСХОДА ЖИДКОСТИ(54) CONSTITUTION FOR MEASURING FLUID FLOW

II

Изобретение относитс к средствам измерени расхода жидкости с помощью уровнемеров, в частности дискретных.The invention relates to measuring the flow of a liquid using level gauges, in particular discrete ones.

Известно устройство дл измерени расхода жидкости, содержащее дискретный многопознционный датчик уровн , соещшенный с регистрирующим устройством через усилитель и формирователь 1.A device for measuring the flow rate of a liquid is known, which comprises a discrete multiobjective level sensor associated with a recording device through an amplifier and a driver 1.

Недостатком известного устройства вл етс сравнительно высока погрешность измерени , обусловленна колебани ми поверхности жидкости .A disadvantage of the known device is the relatively high measurement error due to fluctuations in the surface of the liquid.

Цель изобретени - повышение тошости измерени расхода жидкости. .The purpose of the invention is to increase the nausea of measuring fluid flow. .

Поставленна цель достигаетс тем, что в устройстве дл измерени расхода жидкости, содержащем даскретный многонозищгонный датчик уровн , соединений через усилитель и формирователь с регистрирующим прибором, дополнительно введены блок управлени , блок пам ти, блок обработки н блок времени, причем один вход блока времени соединен с первым выходом формировател , второй выход которого соединен с первым входом блока паlypiTH , второй вход которого св зан с выходом блока времени, выход блока пам ти соединен с первым входом блока обработки, первый выход которого соединен с третьим входом блока пам ти, а второй - с вькодом регистрирующего устройства, а выходы блока управлени подключены к входам формировател , блока времени, блока пам ти и блока обработки.This goal is achieved by the fact that in the device for measuring the flow rate of a liquid containing a multiple-level multisynchronous level sensor, connections through an amplifier and a driver with a recording device, a control unit, a memory unit, a processing unit and a time unit are additionally introduced, with one time block input connected to the first output of the imaging device, the second output of which is connected to the first input of the powerpiTH block, the second input of which is connected to the output of the time block, the output of the memory block is connected to the first input of the processing unit, rvy whose output is connected to a third input of the memory unit, and the second - with vkodom recording device, and the control unit outputs are connected to inputs shaper, timing unit, memory unit and processing unit.

На фиг. 1 представлена блок-схема предла10 гаемого устройства; на фиг. 2 - кодовые последовательности отработки чувствительности злементов.FIG. 1 is a block diagram of the proposed device; in fig. 2 - code sequences for testing the sensitivity of elements.

Устройство содержит дискретный многопозиционный датчик 1 уровн , усилитель 2, The device contains a discrete multi-level sensor 1 level, amplifier 2,

15 формирователь 3, блок 4 времени, блок 5 пам ти, блок 6 обработки, блок 7 управлени и регистрирующее устройство 8.15, a driver 3, a time unit 4, a memory unit 5, a processing unit 6, a control unit 7 and a recording device 8.

Устройство работает следующим образом.The device works as follows.

Сигналы с датчика 1 уровн , имеющего The signals from the sensor 1 level having

20 пространственно-временную кодировку (фиг.2а), nocTyTiaioT на усилитель 2.20 space-time coding (Fig. 2a), nocTyTiaioT to amplifier 2.

Claims

The sequence of 2 polar impulses characterizes the moments of the passage of the level 384 of a liquid through the sensitive elements of dates. chica. From the output of amplifier 2, signals are sent to shaper 3, where the separation of a sequence of 2 polar signals and the forltation of 2 sequences, unipolar pulses (Fig.). The timing diagram shows the sequences formed as a result of the passage of a fluid level through sensitive elements, starting from the 7th to the 20th. In this case, the testing of 7-ro and 8-th sensitive elements is accompanied by the formation of spurious signals following with the Interval D T. The generated pulse sequences, each of which carries information about the operation of the sensitive element, are recorded in memory block 5. At the same time, the current time code corresponding to the moments of sensitive elements processing is written to the memory block 5 from the time block. In order to eliminate false information in case of fluid oscillations, the validity of the moments of testing sensitive elements is determined by analyzing the time interval between 2 consecutive moments of testing sensitive elements A T with a predetermined constant Tconst. Value that is less than the average passage time of the liquid between the elements, but longer average time of passage of fluid through the sensing element. If lt tconst. then this means that the moments of testing are false, if D T Tconst, then they are true. The control unit 7 controls the sequential sampling of the time code from the memory block 5, which are fed to the processing unit 6, where the determination of the true moments of the processing of sensitive elements, the formation of a reliable code sequence of the processing of sensitive elements and the determination of numbers of the spent sensitive elements are performed. From the true time points in the block. Pam, a temporary array is formed and the corresponding code sequence of testing the sensitive elements. The display of a reliable code sequence for the processing of sensitive elements was made on a. .2 g d. The determination of the numbers of the used sensitive elements is carried out by shifting and comparing the generated code sequence for testing the sensitive elements with the reference coding of the level sensor n. The number of shifts of the reference coding code up to the moment of comparison with the code of the sequence of moments of testing the sensitive elements uniquely determines the number of the first spent sensitive element in the code sequence. After determining the numbers of the spent parts in the processing unit, the volume flow is calculated at specified intervals using the formula O / 11. 3.a -9 Tk - Ti where Q is the volume flow; Vk.Vj - volumes of fluid corresponding to the levels of the m-th and i-ro sensitive elements; TK, TJ is the time interval between the k-th and i-ro sensing elements, the values of V and Vj are determined by the numbers of the sensing elements that worked at the times T and Tj and the calibration characteristic of the level sensor. The results of the calculation of the flow in the testing unit 6 are provided to the recording device. The economic effect of using the invention is achieved by reducing losses as a result of more accurate accounting of the consumed liquid. The invention The device dp measure the flow rate of a liquid, containing a discrete multi-position sensor, connected through an amplifier and a former with a recording device, characterized in that, in order to improve the accuracy of flow measurement, a control unit, a test unit and a unit are added to it. time 1, and one input of the time block is connected to the first output of the driver, the second output of which is connected to the first input of the memory block, the second input of which is connected to the output of the time block. the output of the memory unit is connected to the first input of the processing unit: the first output of which is connected to the third input of the memory unit, and the second to the output of the recording device, and the output of the control unit are connected to the inputs of the imaging unit, time unit, memory unit and processing unit . Sources of information taken into account during the examination 1. USSR author's certificate on invention No. 304445, cl. G 01 F 23/18, 1970 (aboutTOTim). I g 3 f f b 7 I 3 w ii natins ISn re r th it tt isnzsts ti and gas n g