CN214372827U - Calibration system of ultrasonic metering device - Google Patents
Calibration system of ultrasonic metering device Download PDFInfo
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- CN214372827U CN214372827U CN202120536095.4U CN202120536095U CN214372827U CN 214372827 U CN214372827 U CN 214372827U CN 202120536095 U CN202120536095 U CN 202120536095U CN 214372827 U CN214372827 U CN 214372827U
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- 230000003993 interaction Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 9
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Abstract
The utility model provides an ultrasonic metering device's calibration system, include: the ultrasonic flow meter comprises a plurality of pairs of standard meters and ultrasonic metering devices to be verified, a flow rate control electromagnetic valve container and a constant pressure supply system which are sequentially connected in series, and further comprises a verification upper computer; each pair of standard meters and ultrasonic metering devices to be verified are adjacently connected in series, and the plurality of pairs of standard meters and ultrasonic metering devices to be verified, the flow rate control electromagnetic valves and the constant-pressure supply systems are respectively in communication connection with the verification upper computer; the flow rate control electromagnetic valve controls the flow rate of the system to reach a set flow rate point, the check upper computer obtains the flow rate of each pair of standard tables and ultrasonic metering devices at the corresponding flow rate point, and the check coefficients obtained by calculation are fed back to the corresponding ultrasonic metering devices again; the calibration system of the invention adopts a speed method for calibration, thereby saving calibration time and reducing the requirement on the consistency of the pipe section or the transducer.
Description
Technical Field
The utility model belongs to the technical field of ultrasonic wave measurement and calibration, especially, relate to an ultrasonic wave metering device's calibration system.
Background
At present, the mass method or the volume method is generally adopted in the field of calibration and verification of ultrasonic wave metering. During calibration, firstly, randomly selecting a small number of devices from the same batch of ultrasonic metering devices, performing mass method or volume method test at each flow velocity point, finding out a set of calibration parameters, and expecting to perform calibration by replacing the overall characteristics with the characteristics tested by a part of pipe sections; the verification also needs to be performed at each flow point. This verification method is time-consuming and labor-consuming, and for example, a flow of 10L/h takes half an hour for a flow point of 5L.
Because the metering devices in the same batch adopt the same calibration parameters, the tube sections or the transducers are required to have higher consistency based on a partial-to-integral-replacing calibration mode, higher requirements are put on the production process of suppliers, and otherwise, the passing rate during factory inspection may not be high.
Therefore, there is a need for a calibration system for an ultrasonic metrology device that saves calibration time and reduces the compliance requirements for the spool piece and transducer.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an ultrasonic metering device's check-up system not only can reduce the uniformity requirement to pipeline section and transducer, reduces ultrasonic metering device's check-up time greatly moreover, improves production efficiency.
The utility model provides an ultrasonic metering device's calibration system, include:
the ultrasonic metering device comprises a plurality of pairs of standard meters and ultrasonic metering devices to be checked, wherein the standard meters and the ultrasonic metering devices to be checked are arranged in pairs;
the flow rate control electromagnetic valve is used for controlling the flow rate of the calibration system and is connected in series with a standard meter and a loop of the ultrasonic metering device to be calibrated;
the container is used for containing a metering medium and is connected in series with a standard meter and a loop of the ultrasonic metering device to be verified;
a constant pressure supply system for providing a constant pressure to the metering medium;
the calibration upper computer comprises a control module, a communication module, a calibration module and a storage device, wherein the storage device is used for storing set flow rate points, and the plurality of pairs of standard meters and the ultrasonic metering device to be calibrated, the flow rate control electromagnetic valve and the constant-pressure supply system are respectively in communication connection with the calibration upper computer; the flow rate control electromagnetic valve is used for controlling the flow rate of the system to reach a set flow rate point, the communication module is used for acquiring the flow rate of each pair of standard tables and ultrasonic metering devices at the corresponding flow rate point and transmitting the flow rate to the calibration module, and the calibration module is used for calculating the obtained check coefficient and feeding the check coefficient back to the corresponding ultrasonic metering device.
As a further improvement of the above scheme, the container is arranged at an outflow end of the ultrasonic metering device with the standard meter and the ultrasonic meter to be verified at the tail, and a first switch valve is arranged between the ultrasonic metering device with the standard meter and the ultrasonic meter to be verified at the tail and the container, and is used for controlling the outflow on-off of the metering medium.
As a further improvement of the above scheme, the calibration system further comprises a second switch valve, and the second switch valve is arranged at the inflow end of the ultrasonic metering device to be calibrated, and is used for controlling the inflow on-off of the metering medium.
As a further improvement of the above scheme, the first switch valve and the second switch valve are both electronic control switch valves or manual switch valves, and when the first switch valve and the second switch valve are electronic control switch valves, the first switch valve and the second switch valve are respectively in communication connection with the checking upper computer.
As a further improvement of the scheme, the flow rate control electromagnetic valve and the constant pressure supply system are arranged between the container and the head pair standard meter and the ultrasonic metering device to be verified and used for controlling the flow rate of the metering medium, and the flow rate control electromagnetic valve is in communication connection with the energy storage upper computer.
As a further improvement of the above solution, the control module is electrically connected to the constant pressure supply system and is configured to control an output constant pressure of the constant pressure supply system; and the control module is also electrically connected with the flow rate control electromagnetic valve and used for controlling the flow rate of the metering medium by controlling the opening size of the flow rate control electromagnetic valve.
As a further improvement of the above scheme, the communication module is in communication connection with the standard meter, the ultrasonic metering device and the container respectively, and is used for acquiring flow speed and flow rate required by the standard meter and the ultrasonic metering device.
As a further improvement of the above scheme, the calibration module is configured to automatically calculate a calibration coefficient according to the flow speed and flow data acquired by the communication module, and the calibration module transmits the calibration coefficient to the ultrasonic metering device through the communication module.
As a further improvement of the scheme, the calibration upper computer further comprises a man-machine interaction module for setting a plurality of flow rate points VFR required to be calibrated by the ultrasonic metering devicem。
As a further improvement of the above solution, the container includes but is not limited to a standard container or a non-standard container, specifically, the standard container is a container with a standard volume and can read the volume of the contained metering medium; the non-standard container is a container with a volume of a non-fixed standard value.
As a further improvement of the above solution, the verification system further comprises a support table for supporting the container and the verification loop of the ultrasonic metering device.
The utility model also provides a calibration method of ultrasonic wave metering device, its step includes:
s1, starting a control module, filling the container with metering medium, and inputting m flow rate points [ VFR ] to be corrected on a verification upper computer1,VFR2,…,VFRm]And storing, wherein m is a non-zero natural number;
s2: the upper calibration computer performs calibration according to the required calibrated flow rate point VFR1Calculating the opening size of the flow rate control electromagnetic valve, and issuing a corresponding command to the flow rate control electromagnetic valve, wherein the flow rate control electromagnetic valve controls the flow rate value in the pipeline to reach a required flow rate point;
s3: the checking upper computer controls to close the first switch valve and the second switch valve simultaneously to exhaust until the flow rate in the standard table is stable, and the corresponding flow rate of the first flow rate point is obtained;
s4: respectively reading the flow rates of the ith pair of standard tables and the corresponding ultrasonic metering devices through the communication module to obtain the flow rates of the ith pair of standard tables and the corresponding ultrasonic metering devices which are respectively counted as Vi1，vi1Wherein i is a non-zero natural number;
s5: the upper checking computer adjusts the next flow rate point VFR according to the preset flow rate pointmAt each flow rate point VFRmRepeating the steps S1-S4 until the test of the m flow velocity points is completed, wherein correspondingly, m flow velocity values can be obtained by each pair of the standard meter and the ultrasonic metering device respectively;
s6: for each pair of standard meter and ultrasonic metering device, the calibration upper computer measures the flow rate value (v) according to the actual measurement of the ultrasonic metering devicei1,vi2,…,vim) And a standard flow rate value (V)i1，Vi2，…Vim) M points (v) can be obtained respectivelyi1,Vi1),(vi2,Vi2),…,(vim,Vim), the upper checking computer respectively performs curve fitting on each pair of standard tables and m points obtained by the ultrasonic metering device, and a speed fitting curve a corresponding to the ultrasonic metering device i can be obtainedi1vn+ai2vn-1+…+ain-1v+ainOr piecewise fitting a curve;
s7: and then the upper checking computer transmits the coefficient obtained by fitting to the corresponding ultrasonic metering device through the communication module for calibration.
As a further improvement of the scheme, after each ultrasonic metering device is calibrated, the flow rate control electromagnetic valve is adjusted to the set flow point again, the communication module of the upper computer is verified to read the flow rate values of the corresponding standard table and the ultrasonic metering device respectively to obtain the metering error of the corresponding flow point, and the calibration accuracy is verified accordingly.
As a further improvement of the scheme, after each ultrasonic metering device is calibrated, the container is replaced by a standard container, the initial value and the final value of the water quantity of the standard container are read as standards, the initial value and the final value of the ultrasonic metering device are read as actual measurement values, the error between the initial value and the final value is calculated, and the calibration accuracy is verified accordingly.
As a further improvement of the above scheme, a calculation module is arranged in the verification upper computer, and the calculation module is used for calling a matlab fitting tool including but not limited to matlab fitting tools to respectively perform the m points (v points)i1,Vi1),(vi2,Vi2),…,(vim,Vim) performing curve fitting.
Because the utility model adopts the above technical scheme, make the beneficial effect that this application possesses lie in:
1. the utility model discloses a calibration system of ultrasonic wave metering device, include:
the ultrasonic metering device comprises a plurality of pairs of standard meters and ultrasonic metering devices to be checked, wherein the standard meters and the ultrasonic metering devices to be checked are arranged in pairs;
the flow rate control electromagnetic valve is used for controlling the flow rate of the calibration system and is connected in series with a standard meter and a loop of the ultrasonic metering device to be calibrated;
the container is used for containing a metering medium and is connected in series with a standard meter and a loop of the ultrasonic metering device to be verified;
a constant pressure supply system for providing a constant pressure to the metering medium;
the calibration upper computer comprises a control module, a communication module and a calibration module, wherein the calibration upper computer is in communication connection with a plurality of pairs of standard meters and ultrasonic metering devices to be calibrated, flow rate control electromagnetic valves and constant-pressure supply systems, and the ultrasonic metering devices are stored in the calibration upper computer and required to be calibratedM velocity points VFRmThe control system controls the opening size of the flow rate control electromagnetic valve so as to control the flow rate of the metering medium of the verification system, under the constant pressure controlled by the constant pressure supply system and the corresponding flow rate controlled by the flow rate control electromagnetic valve, the communication module reads the corresponding standard flow rate value and the actual measurement flow rate value of each pair of the standard meter and the ultrasonic metering device, the calibration module automatically calculates a calibration coefficient according to the flow speed and flow data acquired by the communication module, and the calibration module transmits the calibration coefficient to the ultrasonic metering device through the communication module, thereby realizing the calibration of the ultrasonic metering device, the calibration system controls the flow rate of the system through the flow rate control electromagnetic valve, tests and compares the flow rate through the standard meter and the ultrasonic metering device, thereby obtaining a calibration coefficient, and feeding back the calibration coefficient to the ultrasonic metering device again to realize the calibration of the ultrasonic metering device; the calibration system adopts a speed method for calibration, compared with the traditional volume method or mass method for calibration, the calibration system only needs to control the calibration system to reach a set flow rate value because the metering medium in a container does not need to flow out for a cycle, so that the test time is saved, meanwhile, a standard table is correspondingly arranged near each calibrated ultrasonic metering device, the influence of the system on the flow rate at different positions due to the pressure fluctuation of the system is relatively reduced, and the requirement on the consistency of a pipe section or a transducer is also reduced.
2. The utility model discloses a calibration method of ultrasonic metering device, firstly, input m velocity points [ VFR ] that need to be corrected on the calibration host computer1,VFR2,…,VFRm]And storing, checking each flow velocity point VFR of the upper computer according to the required checkmCalculating the opening size of the flow rate control electromagnetic valve, issuing corresponding commands to the flow rate control electromagnetic valve, and controlling the flow rate value in the pipeline to reach the required flow rate point VFRm(ii) a The communication module respectively reads the flow rates of the ith pair of standard tables and the corresponding ultrasonic metering devices, and the flow rates of the ith pair of standard tables and the corresponding ultrasonic metering devices are respectively measured as Vi1，vi1Until the test of m flow velocity points is completed, correspondingly, each pair of standard meter and ultrasonic meterThe measuring devices can respectively obtain m flow velocity values; for each pair of standard meter and ultrasonic metering device, the calibration upper computer measures the flow rate value according to the actual measurement of the ultrasonic metering device
(vi1,vi2,…,vim) And a standard flow rate value (V)i1，Vi2，…Vim) M points (v) can be obtained respectivelyi1,Vi1),(vi2,Vi2),…,(vim,Vim), the upper checking computer respectively performs curve fitting on each pair of standard tables and m points obtained by the ultrasonic metering device, and a speed fitting curve a corresponding to the ultrasonic metering device i can be obtainedi1vn+ai2vn-1+…+ain-1v+ainOr piecewise fitting a curve; then the upper computer transmits the coefficient obtained by fitting to the corresponding ultrasonic metering device through the communication module for calibration, the calibration method is simple, quick and effective, compared with the traditional calibration method which utilizes a volume method or a mass method, as the metering medium in the container does not need to flow out for a cycle, only the flow rate control electromagnetic valve needs to be controlled to reach the set flow rate value, the testing time is saved, meanwhile, a standard table is correspondingly arranged near each verified ultrasonic metering device, so that the influence of system pressure fluctuation on the flow velocity at different positions is relatively reduced, and each verified ultrasonic metering device can obtain a corresponding verification coefficient, and compared with the method that the verification parameters obtained by sampling test are used for replacing the whole verification coefficient, the requirement on the consistency of the pipe section or the transducer is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
fig. 1 is a schematic connection diagram of a calibration system of an ultrasonic metering device according to the present invention;
fig. 2 is a schematic flow chart of a calibration method of the ultrasonic metering device according to the present invention;
reference numerals:
10. checking the upper computer; 20. a second on-off valve; 30. a standard table; 40. an ultrasonic metering device; 50. a first on-off valve; 60. a container; 70. a constant pressure supply system; 80. a flow rate control solenoid valve; 90. and supporting the table body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators in the embodiments of the present invention, such as the first, second, upper, lower, left, right, front and rear … …, are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
The invention will be further described with reference to the following figures:
example 1:
referring to fig. 1, the present invention provides a calibration system for an ultrasonic metering device 40, including:
the ultrasonic meter comprises a plurality of pairs of standard meters 30 and ultrasonic metering devices 40 to be verified, wherein the standard meters 30 and the ultrasonic metering devices 40 to be verified are arranged in pairs, each pair of standard meters 30 is adjacently connected in series with each other, and the standard meters 30 and the ultrasonic metering devices 40 to be verified are sequentially connected in series;
the flow rate control electromagnetic valve 80 is used for controlling the flow rate of the verification system, and the flow rate control electromagnetic valve 80 is connected in series on the standard meter 30 and a loop of the ultrasonic metering device 40 to be verified;
a container 60 for containing a metering medium and connected in series to the loop of the calibration gauge 30 and the ultrasonic metering device 40 to be verified;
a constant pressure supply system 70 for providing a constant pressure to the metering medium;
the calibration upper computer 10 comprises a control module, a communication module, a calibration module and a storage device, wherein the storage device is used for storing set flow rate points, and the plurality of pairs of standard meters 30, the ultrasonic metering device 40 to be calibrated, the flow rate control electromagnetic valve 80 and the constant pressure supply system 70 are respectively in communication connection with the calibration upper computer 10; the flow rate control electromagnetic valve 80 controls the flow rate of the system to reach a set flow rate point, the communication module obtains the flow rate of each pair of the standard table 30 and the ultrasonic metering device 40 at the corresponding flow rate point and transmits the flow rate to the calibration module, and the calibration module feeds back the check coefficient obtained by calculation to the corresponding ultrasonic metering device 40 again.
M flow velocity points VFR required to be verified by the ultrasonic metering device 40 are stored in the verification upper computer 10mThe control system controls the flow rate of the metering medium of the flow rate control electromagnetic valve 80 to control the calibration system, under the constant pressure controlled by the constant pressure supply system 70 and the corresponding flow rate controlled by the flow rate control electromagnetic valve 80, the communication module reads the corresponding standard flow rate value and the actual measurement flow rate value of each pair of the standard meter 30 and the ultrasonic metering device 40, the calibration module automatically calculates the calibration coefficient according to the flow rate and the flow data acquired by the communication module, and the calibration module transmits the calibration coefficient to the ultrasonic metering device 40 through the communication module, thereby realizing the calibration of the ultrasonic metering device 40, controlling the flow rate of the system through the flow rate control electromagnetic valve 80, and testing and comparing the flow rate through the standard meter 30 and the ultrasonic metering device 40Then, the calibration coefficient is obtained and fed back to the ultrasonic metering device 40 again to realize the verification of the ultrasonic metering device 40; compared with the traditional method of checking by using a volume method or a mass method, the checking system adopts a speed method for checking, and only needs to control the checking system to reach a set flow rate value because the metering medium in the container 60 does not need to flow out for a cycle, so that the testing time is saved, and meanwhile, a standard table 30 is correspondingly arranged nearby each checked ultrasonic metering device 40, so that the influence of the system on the flow rate at different positions due to the pressure fluctuation of the system is relatively reduced, and the requirement on the consistency of a pipe section or a transducer is also reduced.
In a preferred embodiment, the container 60 is arranged at the outflow end of the last pair of standard meters 30 and the ultrasonic metering device 40 to be verified, and a first on-off valve 50 is arranged between the last pair of standard meters 30 and the ultrasonic metering device 40 to be verified and the container 60, and the first on-off valve 50 is used for controlling the outflow on-off of the metering medium; the calibration system further comprises a second switch valve 20, the second switch valve 20 is arranged at the inflow end of the head of the standard meter 30 and the ultrasonic metering device 40 to be calibrated and used for controlling the inflow on-off of the metering medium, the arrangement of the first switch valve 50 and the second switch valve 20 is convenient for controlling the on-off of the calibration loop of the calibration system, and the ultrasonic metering is sensitive to bubbles in fluid, so that the on-off of the first switch valve 50 and the second switch valve 20 is particularly important for closing at each flow rate point, the gas in the fluid is convenient to discharge timely until the flow rate in the standard meter 30 is stable.
As a preferred embodiment, the first switch valve 50 and the second switch valve 20 are both electronic control switch valves or manual switch valves, and when the first switch valve 50 and the second switch valve 20 are electronic control switch valves, the first switch valve 50 and the second switch valve 20 are respectively in communication connection with the calibration upper computer 10, in this embodiment, the first switch valve 50 and the second switch valve 20 are both electronic control switch valves, and the calibration upper computer 10 can control the first switch valve 50 and the second switch valve 20 to open and close.
As a preferred embodiment, the flow rate control solenoid valve 80 and the constant pressure supply system 70 are disposed between the container 60 and the head pair gauge 30 and the ultrasonic metering device 40 to be verified, and are used for controlling the flow rate of the metered medium, and the flow rate control solenoid valve is in communication connection with the energy storage upper computer, and the flow rate control solenoid valve 80 is disposed so as to facilitate the verification upper computer 10 to control the flow rate of the verification system to reach a set flow rate point.
In a preferred embodiment, the control module is electrically connected to the constant pressure supply system 70 and is configured to control the output constant pressure of the constant pressure supply system 70; and the control module is also electrically connected with the flow rate control electromagnetic valve 80 and used for controlling the flow rate of the metering medium by controlling the opening size of the flow rate control electromagnetic valve 80.
In a preferred embodiment, the communication module is in communication connection with the standard meter 30, the ultrasonic metering device 40 and the container 60 respectively, and is used for acquiring the flow rate and flow rate required by the standard meter 30 and the ultrasonic metering device 40.
In a preferred embodiment, the calibration module is configured to automatically calculate a calibration coefficient according to the flow rate and flow data acquired by the communication module, and the calibration module is transmitted to the ultrasonic metering device 40 through the communication module.
As a preferred embodiment, the calibration upper computer 10 further includes a human-computer interaction module for setting a plurality of flow rate points VFR to be calibrated for the ultrasonic metering device 40m。
As a preferred embodiment, the container 60 includes, but is not limited to, a standard container 60 or a non-standard container 60, and in particular, the standard container 60 is a container 60 having a standard volume and capable of reading the volume of the metering medium contained therein; the non-standard container 60 is a container 60 with a volume of a non-fixed standard value, and the ultrasonic metering device 40 is verified by adopting a speed method for the verification system, so that the volume and the quality of the container 60 are not strictly required, and only a metering medium can be contained in the container 60.
In a preferred embodiment, the verification system further comprises a support table 90 for supporting the container 60 and the verification loop of the ultrasonic metrology device 40.
Example 2:
referring to fig. 2, the present invention further provides a calibration method of the ultrasonic metering device 40, which includes the steps of:
s1, starting a control module to fill the container 60 with the metering medium and inputting m flow rate points [ VFR ] to be corrected on the upper calibration computer 101,VFR2,…,VFRm]And storing, wherein m is a non-zero natural number;
s2: the upper calibration computer 10 calibrates the flow rate point VFR according to the requirement1Calculating the opening size of the flow rate control solenoid valve 80, and issuing a corresponding command to the flow rate control solenoid valve 80, wherein the flow rate control solenoid valve 80 controls the flow rate value in the pipeline to reach a required flow rate point;
s3: the upper checking computer 10 controls to close the first switch valve 50 and the second switch valve 20 simultaneously for exhausting until the flow rate in the standard meter 30 is stable, and the corresponding flow rate of the first flow rate point is obtained;
s4: respectively reading the flow rates of the ith pair of standard tables 30 and the corresponding ultrasonic metering device 40 through the communication module to obtain the flow rates respectively measured as V of the ith pair of standard tables 30 and the ultrasonic metering device 40i1，vi1Wherein i is a non-zero natural number;
s5: the upper checking computer 10 adjusts the next flow rate point VFR according to the preset flow rate pointmAt each flow rate point VFRmRepeating the steps S1-S4 until the test of the m flow velocity points is completed, wherein correspondingly, m flow velocity values can be obtained by each pair of the standard table 30 and the ultrasonic metering device 40 respectively;
s6: for each pair of the standard meter 30 and the ultrasonic metering device 40, the verification upper computer 10 verifies the actual measurement flow rate value (v) of the ultrasonic metering device 40i1,vi2,…,vim) And a standard flow rate value (V)i1，Vi2，…Vim) M points (v) can be obtained respectivelyi1,Vi1),(vi2,Vi2),…,(vim,Vim), the calibration upper computer 10 respectively performs curve fitting on m points obtained by each pair of the standard meter 30 and the ultrasonic metering device 40 to obtain a speed fitting curve a corresponding to the ultrasonic metering device 40ii1vn+ai2vn-1+…+ain-1v+ainOr piecewise fitting a curve;
s7: and then the upper checking computer 10 transmits the coefficient obtained by fitting to the corresponding ultrasonic metering device 40 through the communication module for calibration. The calibration method is simple, quick and effective, compared with the traditional calibration method by using a volume method or a mass method, the calibration method does not need to flow out a metering medium in the container 60 for a cycle, only needs to control the flow rate control electromagnetic valve 80 to reach a set flow rate value, not only saves the testing time, but also correspondingly sets a standard table 30 near each calibrated ultrasonic metering device 40, thus relatively reducing the influence of system pressure fluctuation on the flow rate at different positions, each calibrated ultrasonic metering device 40 can obtain a corresponding calibration coefficient, and compared with the method that the calibration parameters obtained by adopting sampling test are used for replacing the whole calibration coefficient, the requirement on the consistency of a pipe section or a transducer is also reduced.
As a preferred embodiment, a calculation module is arranged in the verification upper computer 10, and the calculation module is used for calling a matlab fitting tool including but not limited to matlab fitting tool to respectively perform the m points (v)i1,Vi1),(vi2,Vi2),…,(vim,Vim) performing curve fitting.
In a preferred embodiment, after each ultrasonic metering device 40 is calibrated, the flow rate control solenoid valve 80 is adjusted to a set flow point again, the communication module of the calibration host computer 10 reads the flow rate values corresponding to the standard table 30 and the ultrasonic metering device 40 respectively to obtain the metering error of the corresponding flow point, so as to verify the calibration accuracy of the calibration precaution, and through testing, the metering errors obtained by the calibration method are all within a specified range.
As preferred embodiment, for the verification of change the utility model discloses the accuracy of the speed method check that adopts, can adopt volume method or quality method to verify again, it is concrete, wait that every ultrasonic metering device 40 calibrates after, trade container 60 for standard container 60, the initial value of the water yield and the last value of reading standard container 60 are the standard, the initial value and the last value of reading ultrasonic metering device 40 are worked as actual measurement value, calculate the error between the two, verify calibration accuracy according to this, through the test, the measurement error that adopts this verification method to obtain all is within the specified range.
The above is a detailed introduction of the present invention, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the explanations of the above embodiments are only used to help understand the methods and core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. A verification system for an ultrasonic metrology device, comprising:
the ultrasonic metering device comprises a plurality of pairs of standard meters and ultrasonic metering devices to be checked, wherein the standard meters and the ultrasonic metering devices to be checked are arranged in pairs;
the flow rate control electromagnetic valve is used for controlling the flow rate of the verification system to reach a set flow rate point, and the flow rate control electromagnetic valve is connected in series on a loop of the standard meter and the ultrasonic metering device to be verified;
the container is used for containing a metering medium and is connected in series with a standard meter and a loop of the ultrasonic metering device to be verified;
a constant pressure supply system for providing a constant pressure to the metering medium;
the calibration upper computer is respectively in communication connection with the plurality of pairs of standard meters and the ultrasonic metering devices to be calibrated, the flow rate control electromagnetic valves and the constant-pressure supply system;
and the checking upper computer is used for acquiring the flow rate of each pair of standard tables and ultrasonic metering devices at the corresponding flow rate point, and is also used for calculating the obtained checking coefficient and feeding the checking coefficient back to the corresponding ultrasonic metering device.
2. The system for verifying the ultrasonic metering device as claimed in claim 1, wherein the verifying upper computer comprises a control module, a communication module, a calibration module and a storage device, wherein the control module is electrically connected with the constant pressure supply system and is used for controlling the output constant pressure of the constant pressure supply system; the control module is also electrically connected with the flow rate control electromagnetic valve and is used for controlling the flow rate of the metering medium by controlling the opening size of the flow rate control electromagnetic valve; the storage device is used for storing the set flow rate point; the communication module is used for acquiring the flow rate of each pair of standard meters and ultrasonic metering devices at the corresponding flow rate point and transmitting the flow rate to the calibration module; and the calibration module is used for calculating the obtained check coefficient and feeding back the check coefficient to the corresponding ultrasonic metering device.
3. The system for verifying the ultrasonic metering device of claim 1 or 2, wherein the container is arranged at an outflow end of the last pair of standard meters and the ultrasonic metering device to be verified, and a first switch valve is arranged between the last pair of standard meters and the ultrasonic metering device to be verified and the container and is used for controlling the outflow on-off of the metering medium.
4. The system for verifying the ultrasonic metering device as claimed in claim 1 or 2, wherein the system further comprises a second switch valve, and the second switch valve is arranged at the inflow end of the ultrasonic metering device to be verified and used for controlling the on-off of the inflow of the metering medium.
5. The ultrasonic metering device verification system according to claim 1 or 2, wherein the flow rate control solenoid valve and the constant pressure supply system are provided between the container and the head pair gauge and the ultrasonic metering device to be verified, for controlling the flow rate of the metering medium, and the flow rate control solenoid valve is in communication connection with the verification upper computer.
6. The system for verifying the ultrasonic metering device of claim 2, wherein the communication module is in communication connection with the standard meter, the ultrasonic metering device and the container respectively, and is used for acquiring the flow rate and the flow rate required by the standard meter and the ultrasonic metering device.
7. The system of claim 2, wherein the calibration module is configured to automatically calculate the calibration coefficient according to the flow rate and flow data obtained by the communication module, and the calibration module is transmitted to the ultrasonic metering device through the communication module.
8. The system of claim 1 or 2, wherein the calibration host further comprises a human-machine interaction module for setting a plurality of flow rate points VFR to be calibrated for the ultrasonic meterm。
9. A verification system for an ultrasonic metering device according to claim 1 or claim 2 wherein the container is but not limited to a standard container or a non-standard container.
10. A verification system for an ultrasonic metrology apparatus as claimed in claim 1 or claim 2 wherein the verification system further comprises a support table for supporting the container and the verification loop of the ultrasonic metrology apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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