WO2001020268A1

WO2001020268A1 - Method for determination of the flow rate of a liquid

Info

Publication number: WO2001020268A1
Application number: PCT/RU2000/000363
Authority: WO
Inventors: Alexei Petrovich Kirpichnikov; Nina Georgievna Zhuravleva
Original assignee: Alexei Petrovich Kirpichnikov; Nina Georgievna Zhuravleva
Priority date: 1999-09-13
Filing date: 2000-09-12
Publication date: 2001-03-22
Also published as: AU7463500A

Abstract

The invention is directed at determining the flow rate of a dielectric or weakly conducting liquid medium by means of electromagnetic flowmeters. According to the invention, the strength of an electromagnetic field is varied according to the current value of the flow of a controlled liquid and/or to the time derivative thereof in order to determine the flow of a liquid. The field strength is regulated in such a way that a minimum excited electromagnetic field intensity is obtained with a determined error value of the data signal for the current flow of the controlled liquid.

Description

\ ΥΟ 01/20268 ΡСΤ

The method of separation of liquid.

The invention is subject to the measurement of technology and may

be used for the disposal of liquid by-product with the aid of

ELECTROMAGNETIC RESOURCES

Known methods for the separation of liquids using liquids

ELECTROMAGNETIC DISCONNECTIONS INCLUDE EXCITATION

ELECTROMAGNETIC FIELD IN THE FLOW OF THE CONTROLLED LIQUID, MEASUREMENT

induced EMF and shaping an information signal,

Industrial liquid circulating fluid (see section US

Zh3479871, 73-194, 1969).

The well-known means of the distribution of the waste are

high power consumption, caused by the fact that the magnitude of the intensity

the field excited (the magnitude of the excitation current) is chosen from the condition

ACCESSIBILITY FOR THE MAXIMUM ACCESSIBILITY

based on the worst conditions of use, i.e. maximum. 2

The closest proximity to the property is the means of sharing

Fluid flow, including excitation of the magnetic field in

Ready-to-use circulating fluid, measuring induced on the system

electromotive force EMF, shaping the information (output) signal πο

measured EMF value (this signal is detected by the measured

liquid flow) and the regulation of the intensity of the excitable

magnetic field depending on the intensity of the fluctuations

Disposal from the condition of a hostile signal-to-noise environment is informational

signal (see A.S. Zh761838, Ο01Ρ 1/58, 1978).

The disadvantaged well-known method is also not available in

it is enough to minimize the power spent on

excitation of an electromagnet field in the flow of a circulating liquid.

This is explained by the fact that the signal-to-noise ratio is informational.

the signal is not the only component of the emergency and

is not a sufficiently informative quantity for the division

minimum permissible current value of the excitation path, for the most part

the size of the error is also influenced by the measurement parameters

operation, compatible and environmental media, operating modes and τ.π.

Otherwise, in a known manner, stabilization of the service is carried out

signal / noise, but do not take into account the dependent fault tolerance

the current value of the waste. This means that the magnitude of the excitation \ νθ 01/20268 ΡСΤ / ΚШΟ /

3 is set based on the worst measurement conditions and

maximum values of discharge, i.e. always overstated.

In general, the technical result expected from

the use of the proposed method is to reduce the cost of energy

to excitation of the magnetic field in the process of operation

liquids.

The result indicated is achieved by means of the distribution process.

liquid flow, including excitation of the magnetic field in

Ready-to-use circulating fluid, measuring induced on the system

electromotive force EMF, shaping an information signal at a measured

the magnitude of the emf and the regulation of the intensity of the excited

electric field indicated by the regulation of magnitude

the voltage is excited by a magnetic field in the case of

DEPENDENCES OF THE CURRENT VALUE OF THE FLOW RATE OF THE CONTROLLED

liquids and / or values for reducing the speed of the flow

liquids for a fixed time interval that are shared

The emf values obtained, and therefore the regulation is carried out from

the conditions for attaining a minimum of intensity of excitability

Magnetic field for current value

SPEED OF THE FLOW OF THE CONTROLLED LIQUID

information signal. \ νθ 01/20268

4

On the other hand, on the basis of the division of the minimum intensity

the electromagnet is excited to take into account the parameters

liquid to be controlled and / or parameters that are suitable for conditions

changes in the flow rate of the circulating liquid.

With this regulation, the magnitudes of the intensity of the excitations are excited.

ELECTROMAGNETIC FOR EXIST

the minimum intensity of the excited magnetic field.

It is also worthwhile to stay at regular intervals and regulate

tension excites an electromagnet field and / or task

the error values of the information signal did not increase

Permanent time of an information signal.

On the other hand, in the process of regulation of the magnitude of the tension

the electromagnet is excited to change it

The current actual value of the speed of the flow is controlled

liquid and / or the general size of the reduction of the speed of the flow

The liquid to be sold for a fixed time interval.

In this case, in the process of regulation of the magnitude of the voltage

the electromagnet is excited to take into account the total

The predicted value of the dampness of the information signal.

The value of the decrease in the velocity of flow is also allowed.

CONTROLLED LIQUID FOR A FIXED INTERVAL TIME 5 Allocate the current value to the current value at the same time.

Convertible liquid.

On the other hand, a change in the tension is excited.

ELECTROMAGNETIC FIELD IS PRODUCED DEPENDING ON THE INTEGRAL

Values of the operating time are at a constant speed.

liquids.

It is also sensible to reduce the incidence of excitations.

ELECTROMAGNETIC FIELD TO OPERATE WHEN WHEN THE SPEED IS REDUCED

Start-up of a liquid to be sold for a fixed time interval

less than πορουου value.

Φa φig. 1 and 2 are block diagrams explaining two possible

Realization of the device for the implementation of the proposed method, on

Fig. 3 shows the dependencies of the hazard and the speed of excitation from the speed

Convertible liquid. Device shown in Fig. 1.2

CONSISTING 1 SYSTEM OF ELECTRIC PRODUCTS (two or more electric ones), INPUT

Processor (CCP) 2 (single or multi-channel), unit 3 of the processing,

Integrators 4.5, unit 6 of the job task, unit of 7 memory,

Functional adapter 8, output adapter (CPU) 9

(also single-channel or multi-channel). Items 3 to 8 process 10 seconds

output bus 11 and input (bus) 12. After a bus

13 meters of the flow of product 14 of the circulating liquid. Χыχοд ρсτ / κ

6 of the converter 9 is connected to the unit 15 of the excitation. Φa fig. 1

elements 1-4 are connected to the test and test

channel. The output of block 3 is also connected with the input 5, the output

The unit is connected to unit 6 at the entrance to the unit at the entrance to the unit

connected to bus 12, and the drive to output unit 7. The output of the adapter

8, optionally connected to appliance 9 and unit 15,

Connected to the output of the integrator 5. Quick input of the adapter 8

connected to exit block 6.

Β device π φ φ .2 .2 .2 2 output of unit 3 is connected as well as the output of the unit

5, the output is turned on after unit 6 to the first input of unit 7,

the second entrance is connected to bus 12, and the exit is connected to the entrance

Unit 8, optionally connected to Unit 9 and

BLOCK 15. EXIT BLOCK 3 MAY BE CONNECTED ALSO WITHOUT ENTRANCE

block 8 (fig. 2). At block 3, the signal φ

The current actual value of the speed of the drive is controlled

liquids.

EXAMPLES OF THE IMPLEMENTATION OF THE METHOD FOR OPERATING AND DESCRIPTION OF WORK

device. With block 15 in the working section of section 13

the magnetic field is excited. , Result, Return, and Return

flow 14 on system 1 detects the induced emf, the amplitude is short

the flow rate of the fluid is dependent. \ νο 01/20268

7

The input (or signal), which is the fundamental value of the EMF, runs on

input 10, where the quantity is neglected, the value is

the flow rate and the flow rate are calculated ζ ⁾ . Process 10 ο ми ми ми ρ τ τ τ

Also a cod (signal), which is connected to the adapter 9 and the separator

the intensity of the excitatory field (excitation). Β of this part

The device works like any known electromagnet.

However, in the presence of known solutions, it is available

regulation (decrease) of the excitation rate to the minimum possible (with

Vision areas (space)) values, taking into account the range in the field

the current value, the decrease of ς, the function connecting

magnitude (amplitude value) of current and total failure

maximum permissible measurements for this range

and external information.

In other words, in spite of the known decisions in the service

Regulation (change) of excitation is minimized

It is possible to take into account a whole series of factors, including

ς values for a fixed interval in time, i.e. is controlled and

is used to reduce the energy loss rate of change in consumption.

But, in many cases, the waste products are used to distribute the waste,

long time remaining permanent or quasi-permanent. Β etih

CONDITIONS OF MODERN PROCESSING SYSTEMS OF PROCESSING AND FILTRATION \ UΟ 01/20268

8 easily distinguishes a useful signal from noise and fluctuations, which

It allows you to download, interoperate with good accuracy.

Calculate the total yield even for small quantities of excitation.

Β το, at the same time, all the πprocesses that are in process

sig- nificant reductions in the speed of flow, must be tracked with

there is a significant change in danger. With this process 10 more

DISTRIBUT THE VALUE OF THE REDUCTION OF THE SPEED OF THE FLOW OF THE SIMPLE

from its meanings (in the worst case, it was interrupted, at short

Separation of the distribution is to be carried out, it should be received

προπορcognized by the πpresponding value of

set the current value to a fully loaded and / or empty

to bus 12 of the current dependence of the magnitude of rotation (Fig. 3).

Β Particularly, if process 10 is used, it must be ensured that

this point is equal to that corresponding to v, which corresponds to

the "Α" range, for the total total error is not required

In the standby mode, increase the values of δ _ρа , and in the main - δ _οа , from

the coefficients kι, k ₂ , connecting the excitation and

total error with the value of the speed of the flow, after which

is set equal to ι / ς и и under the condition that to ₂ / does not exceed the value

δ _ρа (δ _οа ) For the other (basic) mode (information in the mode

runs on bus 12 externally). _\ ν _{θ 01/20268}

9

Independently, executed on process 10 in the form

a small digital processor or analogue, it may be working

being described using the block diagram shown in figure 1 and

In the first case, one of the possible algorithms, and the second

- a block diagram with the corresponding elements. Therefore, we will

The operation of the devices shown in Figs. 1 and 2 is more convenient.

The signal component is highlighted in block 3 and after.

Scaling and integrating at a constant time runs on

output bus 11, sharing the output) of the liquid to be circulated. Τοτ

the same signal after integration with a shorter time ι ₂

(speed of flow) runs in block 8 (FIG. 1), where in the simplest case

There is a processing of the processing signal through the converter

9, which is based on the excitability of block 15. The result is

Overgrowth of the speed of the flow of waste is caused by the excitation of the field (which means

and the energy costs of its excitement) are reduced, ensuring

Finding the margin of error in a given range.

Лее In the more extreme case, the incidence of excitation

allowable tolerances taken into account in unit 7 are taken into account

or passing onto the bus 12. Particularly if the flow measurement channel

It works in a more complex device, the requirement for the size

CURRENT EMERGENCY MEASUREMENT OF DISCHARGE MAY BE FORMED BY \ νθ 01/2026

10 contributions of this hazard to the total.

For example, if you are more likely to use more sophisticated devices, go to

Standby mode, in order to allow for a quick exit from

Accurately in Ν times less than in the operating mode, the value Ν runs

on bus 12 and in block 6 οГι) = Μ πο is EXPERIMENTAL

Determined or calculated dependency of measurement error

The flow rate of the magnitude of the excitation path, and in block 8 no longer occurs

the value 1 /, as in the above case, and the value 1 / _* ч, which

It also helps to reduce energy costs (Fig. 1). In addition to this

block 6 may produce a continuous comparison of the current value

the speed of the flow with the values that are found in block 7 and on reaching

The fixed values of the speed of production are optional.

ποdiaπazοnnοe reduction uπρavlyayuschegο signal P _\ ρaz, on ποsτuπayuschegο

input 9, so that the conversion factor of unit 8

πρ has the form 1 / _* Μ _* П; _. Of course, in the manufacturer 8 may happen

Formation and substantially more complex dependencies of the form ¥ (^, £, η),

for example, its output signal may look like: k | [1 / (q) ^{/ 3} _* Μ + b η _; ² ] άι,

where k, b are coefficients of social character.

All cases of current values of the velocity of the flow or its

alternate, as well as current values of other parameters,

take into account the separation of the minimum function that separates UUΟ 0 _1/20268

11 the value of the field that is excited, takes the value of the corresponding

values at the preceding point in time or average of such values

for a few previous points. Β by analog device

Adequate lodging is due to the time available to

device units, in the case of a step-by-step quantization at a time.

Use and use of important values that are obtained in

Process 10 through the extraction of the corresponding values.

Β device π φ φ .2 .2 .2 Fig. 2 unit 8 may be in the simplest case

Signal output equal to the value of the output signal

block 3, i.e. to reduce, and more complexly, to take into account the current

ς value and values set on πο bus 12.

Other possible signal conditioning algorithms

by the magnitude of the excitation path, it may look as follows:

• If there is no signal on the bus 12, the current

value

or π с с ς ς άς or άϊ / άϊ., unit 5,

after block 6, 7 (fig. 2) runs on block 8, which is on

the memory in it, the dependency or

the coefficients that relate the value of the decrease in the velocity

the flow with the magnitude of the excitation path and the signal is generated,

οπρ separating τοκ excitations. For example, in the most extreme case _\ ν _{θ 01/20268}

12 You can share the following expressions: :min <Ι <Ιmax:

(φig.Z);

• In the meanwhile, on bus 12 (Fig. 2), a code box is displayed.

(signal) indicating that you need to increase the accuracy

measuring the maximum flow rate (for example, as a result of

The transition from the standby mode to the primary), then block 7

increases the maximum scale factor or

When output is maximized, the maximum output signal and current

grows up to the maximum (fig. 3);

• if, as the value is increased, the current is taken into account and the current

the value of the velocity of the flow, for example, for the purpose of further

reduce energy costs and higher costs, when

high accuracy of measurement is not required, but it can be

οπρ is separated from the expression:

/ ς. For great speed trades

there may be an additional decrease in the current

excitations:

/, and the dependence of the output current

The speed of the stream may have a more complex view:

and τ.π.

As noted above, it is most practical to use it in a quality manner.

Devices 2 and 9 of the corresponding analogue-digital (CCP) and digital

analog (CPU) converters, and process 10 should be performed as ννθ 01/20268

13 microblock process. In this case, the problem of

neobhodimoy dependency of the current excitation from the current value

the speed of the process and its refinement in the process of the process

significant.

Process 10 (block 8) may not be produced only inappropriately, but

and a discrete decrease in the excitation rate depending on the rotation

SPEED OF PROCESS THAT SIGNIFICANTLY LOSSES THE FORMATION PROGRAM

signal, increasing the magnitude of the current. Πаπρимеρ, the entire range

changes in the speed of the flow may be slightly broken

Area and each shipment is subject to a fixed value

Therefore, 10 process after separation of the device is not subject to change.

Finding the best value in this or another range and from

In the memory of the table, the corresponding value of the current is selected,

so that a change in the magnitude of the current occurs only on exit

Extension from the corresponding range.

If, in the weekly case, the process 10 sets the minimum

excitation rate (in the absence of prolonged speed reduction)

flow), it may also increase at first after some time,

PRINCIPAL OPPORTUNITY AND DAMAGE

προπορcional προυг или илиг или или или вв или или или или или 12 12

ρ енду ρ ас ас... At the same time, all are intermediate (between points). 14 increase in flow), the consumption values are calculated by means of the

Although non-zero excitations can be taken into account and measured

values.

There is one more possible distribution algorithm for the interval after

A rapid increase in the excitation rate may occur.

be given by the formula:

where k is the coefficient of προπορ sociality, δ is

AVAILABLE SECURITY.

The advantages of the proposed method are illustrated in FIG. 3, for

The nominal value of the hazard (impaired) is shown.

function), the real dependency of the fault on the speed of the process

(dashed line) and the dependence of the path of excitation from the speed of the flow

(fat line). From the discussion of Fig. 3, it follows that the proposed method

Provides a significant reduction in power available for

excitation of an electric field, ensuring at the same time and

Improvement of precision.

It should also be clarified that signal conditioning,

The general speed of production is issued in block 3 for any of

of well-known algorithms, and integrator 5 may be missing from the device,

if the current value of the output signal of block 3 is with a satisfactory degree 15 accuracy of the national value ς (in Fig. 2 this value is conditional

It means ά).

In the process of regulating the process, it is advisable to support it in

preset range, the lower part of the range is separated from

the maximum permissible values for this appliance, and

the upper is the largest possible capacity.

Higher fixed rate (fixed)

at the time of regula- tion and the intensity of excitement

MAGNETIC FIELD AND / OR TARGET OR ACCOUNTING

informative signal does not increase constant time

information signal) ensures the stability of measurement

and the implementation of the method. It will be implemented by a quick action

elements 3,5,6,7 and 8 are higher than integer 4.

ACCOUNTING OF PARAMETERS OF THE CONTROLLED LIQUID IS PRODUCED BY USING

introductions of the corresponding food supply to the non-uniform production outlet

sostavu, the possible accumulation of sediment on electricity and t.π. Πaπρimerρ,

if the fluid is aggressive, in the meantime, it will damage the power supply

and underestimation of the indications of the appliance, to the function that separates

the magnitude of the intensity of the excitatory field is introduced linear member,

Do not increase the acceptable value of the measurement error.

Α if the fluid is substantially heterogeneous, the magnitude of the excitation current 16 increase in such a way that the fucking of the composition is also not equal to

Increasing the specified hazard.

TAKING INTO ACCOUNT OF PARAMETERS OF THE METHOD OF MEASUREMENT (PARAMETERS, CHARACTERIZING

conditions for measuring the flow rate of the circulating liquid)

Similarly. For example, if you are measuring or

agro-information indicates the presence of a drift of the measuring path,

The corresponding machine for known algorithms is included in the function,

οπρ separating the minimum excitable field.

Consideration of all the above information on the implementation

The proposed method makes use of the terms and conditions of our offer.

and, accordingly, the processing algorithm in the most general form

as follows. Well, and in the well-known way, process 10 is inextricable

(It goes without saying that the digital signal process does not

excludes quantization at a time and time)

Signal output, publicly accessible

liquids. Τ ο ес ме τ ’

instantaneous θ sets the value of the excitation rate. Ο π в в л ед л в в

Thankfully, it is known that this is the magnitude of the excitation

Variable and shared as a minimum of function from a whole series

arguments, one of which is the current value of speed

ποτοκа. Other parameters may include such values as the current 17 SPEED OF CHANGE OF SPEED OF PROCESS (OPERATED BY 10 PROCESS

the value of the reduction in the velocity of the discharge), the current value of the discharge

neighbors (shared by 10 processes between the potential differences between

of the corresponding electrical system 1, which are supplied and

Accesses the processor 10 through the processor 3, or releases it

to bus 12), electrical EMF (also calculated in process 10

Potential differences between the associated electrical power

system 1 or connects to a bus 12), the temperature of the environmental medium

(the process is calculated at the magnitude of the EMF of the corresponding sensor,

through the adapter 3, or through the bus 12), through

sampling (quantization) at the time of measuring the induced emf

() on the electrical system 1 (process 10 is specified or is

constant for this implementation), mode parameters (set by

bus 12) and other functions that are in contact with the customer,

measuring process and measurement conditions and affecting

The current amount of hazard, for example, nominal (preset)

safety value for the corresponding range, required

performance and so on This function sets the minimum tolerance.

(or near), the value of the excitation current, which

Ensure the set value for each speed value of the flow rate

total error of measurement, depending on the current complex 18 values of the parameters of the signal being controlled and the measurement process.

In general, in the proposed method, at any given moment

in time, i.e. for each current value of the flow velocity and all

The current value is assigned to the other parameters that are taken into account.

faults, compares with the set, after which the parameters

measuring process (quantization step in time and / or speed

excitations) are corrected when the measurement is in error

It appears to be less than set, and τοκ minimum. Indicated function οτ

many of the listed arguments share the calculation or

experimental path and will be memorized by process 10 in the form

Tables or other expressions. Β In the simplest case, this will

each current value of the flow rate and / or its reduction

Suppose that the minimum value of the excitation current is equal to

Important error measurement still does not exceed the set value for this

points. Лее In a more case-by-case case, this makes it possible to further reduce the cost

excitations due to variation in the process of recovery, accounting for dynamics

adjustable signal, measurement conditions, parameters

controlled fluid and other conditions, measured or specified

from the outside.

Therefore, it should be explained that the current value is

In this case, the excitations are associated with the magnitude of the energy consumption at \ νθ 01/20268 ΡСΤ

19 excitation of the field, i.e. some average valid value

current, and the error of measurement depends on the amplitude value of the current in

Moment of occurrence of the numer ous account, higher than the term "value

The flow "is taken from the indicated values: just and

Accurately take into account the amplitude of the current, and at the separation of the minimum

the values of the current are derived from its energetic char- acteristic, medium,

valid values. Accessibility is subject to availability.

of the known connection of the amplitude and current values of the current

the knowledge of its impulses (temporal diagrams).

The foregoing does not merely select or set

The specific processing algorithm of the process 10, and consequently in each

In the final case, share its structure and execution, but also create

A number of secondary algorithms in the framework with the rules above the general

Provisions, i.e. by setting the function that connects the speed of the flow, its

Impairment defined by fault tolerance, parameters of the controlled environment,

measuring process and τ.π., dividing the minimum of this function and

Maintenance of the corresponding excitation path.

With any given algorithm, the proposed method ensures

Significant reduction in energy consumption and distribution of waste are different

the environment, which is especially important at the meeting with the autonomous

food sources, appliances intended for work in ρсτ / κυοο / οοзззз

20 hard-to-reach places or miniature flow meters. Наdnaκο

than more parameters or arguments of the field strength function

excitations are taken into account when finding the minimum acceptable

values, therefore the larger effect is provided by the proposed method.

Our studies have shown that in a number of cases

the mentioned function has at least one, so finding

minimum minimum, τ.e. the smallest of them is very

effective. Furthermore, the effect obtained by using the application is not

may be achieved using the traditional means of reduction

ELECTROMAGNETIC ELECTRONIC CONTROL CONSUMPTIONS, which are in series

Significantly expands their applications, making it possible

autonomous work for a long time.

Claims

\ νθ 01/20268 ρсτ / κυοο / οοзззз 21Φορula of the invention.

1. The method of separation of liquid flow, including excitation

ELECTROMAGNETIC FIELD IN THE FLOW OF THE CONTROLLED LIQUID, MEASUREMENT

induced on the EMF system, the formation of an informational system

signal at measured EMF and voltage regulation

excited magnetic field, which differs in that

the indicated regulation of the magnitude of the intensity of excitation

The electromagnet for output is dependent on the current value.

SPEED OF THE PROCESS OF THE CONTROLLED FLUID AND / OR SURFACES

SPEED OF THE FLOW OF A CONTROLLED LIQUID FOR A FIXED INTERVAL

the time that is shared by the emf values obtained, and thus

Regulation is subject to minimum

the magnetic field excites the magnetic field and is set for

CURRENT VALUE OF THE FLOW RATE OF THE CONTROLLED LIQUID

the size of the error of the information signal.

2. The method of π 1, which is different from the separation of the minimum

the voltage excites the electromagnet in order to take into account

Parameters that affect the conditions of measuring the speed of the process

CONTROLLABLE LIQUID.

3. The method is π 1 or 2, which differs in that the regulation

the magnitude of the voltage excited by the electric field \ νθ 01/2

22 are subject to the minimum minimum.

stresses are excited by the magnetic field.

4. The method of operation π.1, which is different from the fact that at any time

Regulating tension of energizing electric field and / or

setting the error value of the information signal does not increase

Permanent time of an information signal.

5. The method of π 1, which differs in that in the process of regulation

the magnitude of the voltage excites the electromagnet field for it

change the negative current value of the speed of the feed

circulating fluid and / or general size of circulation

SPEED OF THE FLOW OF A CONTROLLED LIQUID FOR A FIXED INTERVAL

in time.

6. The method of π 1, which differs in that in the process of regulation

the magnitude of the voltage excited by the electric field

take into account the total estimated value of the residual

information signal.

7. Method π 1, which differs in that the magnitude of the reduction

SPEED OF THE FLOW OF A CONTROLLED LIQUID FOR A FIXED INTERVAL

At the same time, it divides the current value of the current value of the time

SPEED OF THE FLOW OF THE CONTROLLED LIQUID. 23

8. Method of operation π.1, which is characterized by a change in the tension

The electromagnet is excited because it is dependent on output

integral value at the same time as the speed of starting

CONTROLLABLE LIQUID.

9. The method is π 1, which is characterized by a decrease in the intensity

The electromagnet is excited to excite in the case when

Reducing the speed of the flow of the circulating liquid for

The fixed interval was at the time of changing value.