CN114812713A - Ultrasonic flowmeter with fluid medium identification function and identification method - Google Patents

Ultrasonic flowmeter with fluid medium identification function and identification method Download PDF

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Publication number
CN114812713A
CN114812713A CN202210455175.6A CN202210455175A CN114812713A CN 114812713 A CN114812713 A CN 114812713A CN 202210455175 A CN202210455175 A CN 202210455175A CN 114812713 A CN114812713 A CN 114812713A
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fluid
medium
temperature
sound velocity
ultrasonic
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不公告发明人
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Mezolen Instrument Changzhou Co ltd
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Mezolen Instrument Changzhou Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • G01F1/668—Compensating or correcting for variations in velocity of sound
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/01—Indexing codes associated with the measuring variable
    • G01N2291/011—Velocity or travel time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/022—Liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
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  • Electromagnetism (AREA)
  • Details Of Flowmeters (AREA)

Abstract

The invention relates to the technical field of ultrasonic flowmeters, in particular to an ultrasonic flowmeter with a fluid medium identification function and an identification method, which can simultaneously measure standard condition volume flow and mass flow of various media, correct the standard condition volume flow and mass flow of fluid, better meet the industrial requirements and reduce the use limitation; comprises the following components: an ultrasonic transducer: the ultrasonic wave sensor is used for measuring the transmission time of ultrasonic waves inside fluid in a pipeline and calculating the average sound velocity of fluid medium; a temperature sensor: measuring the temperature of the fluid medium in the pipeline; a memory: the device is used for storing the density and viscosity of the common oil product and the fluid medium, the medium sound velocity at the corresponding standard temperature and the data of the temperature-sound velocity curve function of the common liquid medium; the transmitter: the built-in table database is used for searching the sound velocity matched with the fluid type, finally confirming the type of the fluid, and calling the fluid density, viscosity and thermal expansion coefficient of the corresponding medium type.

Description

Ultrasonic flowmeter with fluid medium identification function and identification method
Technical Field
The invention relates to the technical field of ultrasonic flowmeters, in particular to an ultrasonic flowmeter with a fluid medium identification function and an identification method.
Background
The ultrasonic flowmeter is an instrument for measuring flow by detecting the action of fluid flow on ultrasonic beam, and is mainly composed of three portions of ultrasonic transducer, flow transducer and flow display and accumulation system, in which the ultrasonic transducer can convert the electric energy into ultrasonic energy, and can transmit it into the fluid to be measured, and the ultrasonic signal received by flow transducer can be amplified and converted into electric signal representing flow rate, and can be supplied to display and integration instrument to make display and integration, so that the flow rate can be detected and displayed.
The ultrasonic flowmeter is widely used in the fields of petroleum, chemical industry, water treatment and the like due to strong functionality, but in the trade metering of oil products and the application of industrial sites, the same pipeline always has the condition that different types of media flow, and the currently used ultrasonic flowmeter calculates the flow velocity of fluid through the measurement of ultrasonic time difference, and finally can calculate the working condition flow of the fluid.
Disclosure of Invention
In order to solve the technical problems, the invention provides the ultrasonic flowmeter and the identification method with the fluid medium identification function, which can simultaneously measure the standard-condition volume flow and the standard-condition mass flow of various media, correct the standard-condition volume flow and the standard-condition mass flow of fluid, better meet the industrial requirements and reduce the use limitation.
The invention relates to an ultrasonic flowmeter with a fluid medium identification function, which comprises the following components:
an ultrasonic transducer: the ultrasonic wave sensor is used for measuring the transmission time of ultrasonic waves inside fluid in a pipeline and calculating the average sound velocity of fluid medium;
a temperature sensor: measuring the temperature of the fluid medium in the pipeline;
a memory: the device is used for storing the density and viscosity of the common oil product and the fluid medium, the medium sound velocity at the corresponding standard temperature and the data of the temperature-sound velocity curve function of the common liquid medium;
the transmitter: the built-in table database is used for searching the sound velocity matched with the fluid type, finally confirming the type of the fluid, and calling the fluid density, viscosity and thermal expansion coefficient of the corresponding medium type.
According to the ultrasonic flowmeter with the fluid medium identification function, the memory is configured with a plurality of commonly used oil product names, the density and the viscosity of the corresponding fluid medium, the medium sound velocity at the corresponding standard temperature and the temperature-sound velocity curve function of the commonly used liquid medium when the memory is delivered from a factory.
The ultrasonic flowmeter with the fluid medium identification function, disclosed by the invention, has the advantages that the sound velocities of various common fluid types at standard temperatures are built in the transmitter when the transmitter is delivered from a factory.
The invention discloses an identification method of an ultrasonic flowmeter with a fluid medium identification function, which comprises the following steps:
s1, measuring the ultrasonic transmission time t inside the fluid in the pipeline through the transducer equipped on the ultrasonic flowmeter, and according to the pipe diameter d in And the sound path included angle alpha is calculated, and the average sound velocity C of the fluid medium at the current temperature is calculated t The calculation formula is as follows:
Figure BDA0003618484360000021
s2, dynamically measuring the current temperature T of the pipeline fluid medium through a temperature sensor matched with the ultrasonic flowmeter;
s3, arranging density, viscosity and corresponding standard temperature T of various common oil products and fluid media in the memory S (C) medium sound velocity in degrees C, and the temperature-sound velocity curve function C ═ f (t) for common liquid media;
s4 obtaining sound speed C in pipe medium at current temperature T t Dynamically converting the sound velocity of the medium to the sound velocity C at the standard temperature through a sound velocity-temperature curve function built in a memory S (ii) a The conversion formula is: c S ＝C t ·f(t)；
S5 sound velocity through C at standard temperature S In transmissionSearching sound velocity of matched fluid types in a table database built in the device, finally confirming the types of the fluids, and calling fluid viscosity, density and thermal expansion coefficient of corresponding media types;
and S6, correcting the standard condition volume flow according to the acquired media types, and calculating the mass flow of the media according to the density acquired by searching the internal table.
Compared with the prior art, the invention has the beneficial effects that: firstly, by providing a dynamic medium type identification and loading corresponding parameters such as density, viscosity and the like according to the identified fluid type, the standard condition volume flow is calculated and corrected according to the acquired medium type, and then the density is acquired according to a table database in the transmitter, so that the mass flow of the medium is calculated, the standard condition volume flow and the mass flow of the fluid can be corrected, the industrial requirements can be better met, and the use limitation is reduced.
Drawings
FIG. 1 is a schematic diagram of a media conduit for an ultrasonic transducer and temperature sensor of the present invention;
FIG. 2 is a diagram of a built-in media database of the transmitter of the present invention;
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 2, an ultrasonic flowmeter with a fluid medium identification function according to the present invention includes the following components:
an ultrasonic transducer: the ultrasonic wave sensor is used for measuring the transmission time of ultrasonic waves inside fluid in a pipeline and calculating the average sound velocity of fluid medium;
a temperature sensor: measuring the temperature of the fluid medium in the pipeline;
a memory: the device is used for storing the density and viscosity of the common oil product and the fluid medium, the medium sound velocity at the corresponding standard temperature and the data of the temperature-sound velocity curve function of the common liquid medium;
the transmitter: a table database is arranged in the device and used for searching the sound velocity matched with the fluid type, finally confirming the type of the fluid, and calling the fluid density, viscosity and thermal expansion coefficient corresponding to the medium type; firstly, by providing a dynamic medium type identification and loading corresponding parameters such as density, viscosity and the like according to the identified fluid type, the standard condition volume flow is calculated and corrected according to the acquired medium type, and then the density is acquired according to a table database in the transmitter, so that the mass flow of the medium is calculated, the standard condition volume flow and the mass flow of the fluid can be corrected, the industrial requirements can be better met, and the use limitation is reduced.
According to the ultrasonic flowmeter with the fluid medium identification function, the memory is configured with a plurality of commonly used oil product names, the density and viscosity of the corresponding fluid medium, the medium sound velocity at the corresponding standard temperature and the temperature-sound velocity curve function of the commonly used liquid medium when the memory leaves a factory; this enables quick acquisition of data information of the desired fluid medium.
The invention relates to an ultrasonic flowmeter with a fluid medium identification function and an identification method, wherein sound velocities of various common fluid types at standard temperatures are built in a transmitter when the transmitter leaves a factory; the fluid type can be quickly confirmed, and the fluid viscosity, the density and the thermal expansion coefficient of the corresponding medium type can be called.
The invention discloses an identification method of an ultrasonic flowmeter with a fluid medium identification function, which comprises the following steps:
s1, measuring the ultrasonic transmission time t inside the fluid in the pipeline through the transducer equipped on the ultrasonic flowmeter, and according to the pipe diameter d in And the sound path included angle alpha is calculated, and the average sound velocity C of the fluid medium at the current temperature is calculated t The calculation formula is as follows:
Figure BDA0003618484360000041
s2, dynamically measuring the current temperature T of the pipeline fluid medium through a temperature sensor matched with the ultrasonic flowmeter;
s3, arranging density, viscosity and corresponding standard temperature T of various common oil products and fluid media in the memory S (C) medium sound velocity in degrees C, and the temperature-sound velocity curve function C ═ f (t) for common liquid media;
s4 obtaining sound speed C in pipe medium at current temperature T t Dynamically converting the sound velocity of the medium to the sound velocity C at the standard temperature through a sound velocity-temperature curve function built in a memory S (ii) a The conversion formula is: c S ＝C t ·f(t)；
S5 sound velocity through C at standard temperature S Searching sound velocity of matched fluid types in a table database built in the transmitter, finally confirming the fluid types, and calling fluid viscosity, density and thermal expansion coefficient of corresponding medium types;
and S6, correcting the standard condition volume flow according to the acquired media types, and calculating the mass flow of the media according to the density acquired by searching the internal table.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (4)

1. An ultrasonic flowmeter with fluid medium identification function, characterized by comprising the following components:
an ultrasonic transducer: the ultrasonic wave sensor is used for measuring the transmission time of ultrasonic waves inside fluid in a pipeline and calculating the average sound velocity of fluid medium;
a temperature sensor: the temperature measuring device is used for measuring the temperature of the fluid medium in the pipeline;
a memory: the device is used for storing the density and viscosity of the common oil product and the fluid medium, the medium sound velocity at the corresponding standard temperature and the data of the temperature-sound velocity curve function of the common liquid medium;
the transmitter: the built-in table database is used for searching the sound velocity matched with the fluid type, finally confirming the type of the fluid, and calling the fluid density, viscosity and thermal expansion coefficient of the corresponding medium type.
2. The ultrasonic flowmeter with the fluid medium identification function of claim 1, wherein the memory is configured with a plurality of commonly used oil names, densities, viscosities and medium sound velocities of corresponding fluid media at standard temperatures, and temperature-sound velocity curve functions of commonly used liquid media at factory.
3. The ultrasonic flowmeter with fluid medium identification of claim 2, wherein said transmitter has sound velocities at standard temperatures for a plurality of common fluid types built in at the time of shipment.
4. An ultrasonic flowmeter having a fluid medium identification function according to any one of claims 1 to 3, wherein the identification method comprises the steps of:
s1, measuring the ultrasonic transmission time t inside the fluid in the pipeline through the transducer equipped on the ultrasonic flowmeter, and according to the pipe diameter d in And the sound path included angle alpha is calculated, and the average sound velocity C of the fluid medium at the current temperature is calculated t The calculation formula is as follows:
Figure FDA0003618484350000011
s2, dynamically measuring the current temperature T of the pipeline fluid medium through a temperature sensor matched with the ultrasonic flowmeter;
s3, arranging density, viscosity and corresponding standard temperature T of various common oil products and fluid media in the memory S (C) medium sound velocity in degrees C, and the temperature-sound velocity curve function C ═ f (t) for common liquid media;
s4 obtaining sound speed C in pipe medium at current temperature T t Dynamically converting the sound velocity of the medium to the standard temperature through a sound velocity-temperature curve function built in a memorySpeed of sound C in degrees S (ii) a The conversion formula is: c S ＝C t ·f(t)；
S5 sound velocity through C at standard temperature S Searching sound velocity of matched fluid types in a table database built in the transmitter, finally confirming the fluid types, and calling fluid viscosity, density and thermal expansion coefficient of corresponding medium types;
and S6, correcting the standard condition volume flow according to the acquired media types, and calculating the mass flow of the media according to the density acquired by searching the internal table.
CN202210455175.6A 2022-04-27 2022-04-27 Ultrasonic flowmeter with fluid medium identification function and identification method Pending CN114812713A (en)

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CN202210455175.6A CN114812713A (en) 2022-04-27 2022-04-27 Ultrasonic flowmeter with fluid medium identification function and identification method

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Application Number Priority Date Filing Date Title
CN202210455175.6A CN114812713A (en) 2022-04-27 2022-04-27 Ultrasonic flowmeter with fluid medium identification function and identification method

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CN114812713A true CN114812713A (en) 2022-07-29

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