CN103674193A - Multichannel ultrasonic flow standard dynamic transmission device and application method thereof - Google Patents

Multichannel ultrasonic flow standard dynamic transmission device and application method thereof Download PDF

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Publication number
CN103674193A
CN103674193A CN201310718711.8A CN201310718711A CN103674193A CN 103674193 A CN103674193 A CN 103674193A CN 201310718711 A CN201310718711 A CN 201310718711A CN 103674193 A CN103674193 A CN 103674193A
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groups
flow
multichannel
ultrasonic
flows
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孙斌
罗冰
赵玉晓
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China Jiliang University
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China Jiliang University
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Abstract

The invention relates to a multichannel ultrasonic flow standard dynamic transmission device and an application method of the multichannel ultrasonic flow standard dynamic transmission device. The multichannel ultrasonic flow standard dynamic transmission device comprises a filter, a rectifier, a pressure transmitter, a temperature transmitter and a multichannel ultrasonic flow measuring system. A computer uses a time difference method principle to obtain three values of flow by collecting data measured by three sets of ultrasonic transducers, including the first measuring set, the second measuring set and the third measuring set, in the multichannel ultrasonic flow measuring system, and automatically carries out comparison on every two values, obtained by the measuring sets, of the flow. According to the multichannel ultrasonic flow standard dynamic transmission device and the application method of the multichannel ultrasonic flow standard dynamic transmission device, the number of errors generated in the process of installation is reduced. Due to the facts that the different sets of ultrasonic transducers are used for measuring the flow in a pipeline at the same time, and the mode of mutual check is adopted, accuracy and stability of dynamic transmission are greatly improved.

Description

The dynamic transfer device of multichannel ultrasonic flow standard and using method thereof
Technical field
The invention belongs to flow metering Calibration Technology field, particularly, in metering process, the measurement instrument scene of a upper grade is to the measurement instrument transmission of next stage or verification system and the method for correction metering result.
Background technology
Flow instrument is one of large class instrument in process automation instrument and device, it is widely used in the national economy every field such as metallurgy, electric power, coal, chemical industry, oil and people's daily life, it is development industrial and agricultural production, save the energy, improve production quality, increase economic efficiency and occupy an important position in national economy with the important tool of management level.Along with the development of flow instrument technology, there are various types of flow instruments, more and more outstanding for the calibration operation of flow instrument.Classic method more and more can not meet current needs.
Flow is a dynamically amount, and it is one and only has when fluid motion just in esse physical quantity, and due to this dynamic property, flow is subject to the impact of many complicated factors.The incoming flow that different flow states or different in flow rate distribute can produce different effects for various flow instruments.This just makes the transmission of flowrate measurement value become quite difficult.The flow value of flowmeter carries out transmission of quantity value by Transfer Standards, and by adopting dynamic transmission, Transfer Standards is one or one group of flowmeter, and they calibrated in primary standard.At the flowmeter that these were calibrated (Transfer Standards), access in flowmeter pipeline to be checked and examine and determine, make Transfer Standards and flowmeter to be checked proofread and correct or examine and determine in identical environment.One of the many employing of the dynamic transmission of value of current flux or two turbo flow meters are as Transfer Standards, but bearing in use of turbo flow meter and the friction between axle easily cause precision to reduce, thereby cause easily occurring that precision reduces and the shortcoming such as is difficult for discovering in verification process.In Transfer Standards process, lack a kind of self check and check oneself ability.Turbo flow meter need to directly contact with fluid, so convection cell kind also has certain restriction,
Along with the development of the electronic technology of nearest decades, supersonic technique is day by day perfect, and in practice, has had certain application, and it has measurement and is not subject to that fluid rationality and chemical property etc. affect, convenient for installation and maintenance, measuring accuracy high.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, proposed the dynamic transfer device of a kind of multichannel ultrasonic flow standard and using method thereof.
The present invention includes filtrator, rectifier, pressure unit, temperature transmitter, prover section, multichannel ultrasonic measurement system.
The entrance of filtrator is connected with exterior line by the first standard flange, and the outlet of filtrator is connected with rectifier entrance, and the outlet of rectifier is connected with prover section phase entrance, and prover section outlet is connected with exterior line by the second standard flange; Pressure unit is arranged between filter outlet and prover section entrance, and temperature transmitter is arranged between prover section outlet and the second standard flange; Prover section outside is also provided with multichannel ultrasonic measurement system.Standard flange, filtrator, rectifier, temperature transmitter, pressure unit, prover section etc. weld together composition integrative-structure.Be convenient to be installed in pipeline to be measured, reduce the error that installation process is brought.
Described multichannel ultrasonic measurement system, comprises three pairs of ultrasonic transducers, multichannel pulse signal generation capture card, industrial computer; Three pairs of ultrasonic transducers are divided into 1 group of measurement, 2 groups of measurements, 3 groups of measurements and are arranged on prover section outer wall with fixed angle; Every a pair of ultrasonic transducer is transceiver structure, and the correspondence mutually replacing is as transmitting and receiving element, and is connected with multichannel pulse signal generation capture card by connecting line, and multichannel pulse signal generation capture card inserts in industrial computer respective card slot.
The using method of said apparatus comprises the steps:
fluid after filtrator and rectifier, Engage of standard pipeline section.After stability of flow, by industrial computer, control multichannel pulse signal generation capture card, send pulse signal and reach three pairs of ultrasonic transducers that are arranged on prover section outer wall, and the time when gathering ultrasound wave following current being propagated in pipeline section and the adverse current time while propagating.Utilizing the time difference to send out principle calculates three pairs of ultrasonic transducers and records the flow in pipeline.
Figure 2013107187118100002DEST_PATH_IMAGE004
the flow that the three pairs of ultrasonic transducers in step 1 are recorded is analyzed relatively, compare three pairs of flows that ultrasonic transducer records, compare and measure 1 group with measure 2 groups of flows of surveying, when if error is in allowed band between the two, the average of the flow that these two groups of ultrasonic transducers record is flow in pipeline.If not in scope, analyze and compare and measure 1 group and the flows of measuring 3 groups of surveys, when if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 2 groups of ultrasonic transducers are measured in prompting wrong, if not in scope, analyze compare and measure 2 groups with 3 groups of flows that record of measurement, if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 1 group of ultrasonic transducer is measured in prompting wrong, if do not redeterminate in scope.If surpass three times from new mensuration number of times, report to the police.
Beneficial effect of the present invention: device each several part adopts integrative-structure, is convenient to install, and ultrasonic transducer adopts modular construction, is directly installed on the base at place, pipeline outer wall fixed position and for convenience detach.The present invention has reduced the error of bringing in installation process.Adopt flow in many group ultrasonic transducers while test tube road.And utilize the mode of verifying mutually, greatly improved the Stability and veracity of dynamic transmission.And look into mutually mode and can realize self check object, find in time in verification process, whether precision reduces.Because adopting non-contact measurement, greatly improved usable range, whole process comprises that measurement and verification process all realize robotization.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention schematic diagram.
In Fig. 1: 1-1, the first standard flange, 1-2, the second standard flange, 2, filtrator, 3, pressure unit, 4, rectifier, 5, prover section, 6-1, standard group ultrasonic transducer A, 6-2, standard group ultrasonic transducer B, 6-3,2 groups of ultrasonic transducer A of verification, 6-4,2 groups of ultrasonic transducer B of verification, 6-5,3 groups of ultrasonic transducer A of verification, 6-6, verify 3 groups of ultrasonic transducer B, 7, temperature transmitter.
Embodiment
The present embodiment comprises filtrator, rectifier, pressure unit, temperature transmitter, multichannel ultrasonic measurement system.
In conjunction with Fig. 1 explanation, the entrance of filtrator 2 is connected with exterior line by the first standard flange 1-1, the outlet of filtrator 2 is connected with pressure unit 3 entrances, pressure unit outlet is connected with rectifier 4 entrances, the outlet of rectifier 4 is connected with prover section 5 phase entrances, standard pipe outside is provided with 6 ultrasonic transducer 6-1,6-2,6-2,6-3,6-4,6-5,6-6, prover section 5 outlets are connected with temperature transmitter 7 entrances, and temperature transmitter 7 outlets are connected with exterior line by the second standard flange 1-2.Device each several part adopts integral structure, and convenient installation reduced alignment error.
Multichannel ultrasonic measurement system is by 6 ultrasonic transducers, multichannel pulse signal generation capture card, industrial computer forms, every a pair of ultrasonic transducer is transceiver structure, and the correspondence mutually replacing is as transmitting and receiving element, ultrasonic transducer 6-1, 6-2 is decided to be 1 group of measurement, ultrasonic transducer 6-3, 2 groups of 6-4 location surveys, ultrasonic transducer 6-5, 3 groups of 6-6 location surveys are also arranged on prover section outer wall fixed position with fixed angle, and be connected with multichannel pulse signal generation capture card by connecting line, multichannel pulse signal generation capture card inserts in industrial computer respective card slot.
The dynamic transfer device of whole multichannel ultrasonic flow standard need to carry out flow scale in laboratory, draw corresponding flow range, and uncertainty etc., to meet dynamic Transfer Standards requirement.
The using method of said apparatus comprises the steps:
Figure 706082DEST_PATH_IMAGE002
fluid is by filtrator 2, pressure unit 3, after rectifier 4, Engage of standard pipeline section 5 is after stability of flow, industrial computer is controlled multichannel pulse signal generator and is sent pulse signal, make each the transducer A of group in ultrasonic transducer 6-1 as shown in Figure 1, 6-3, 6-5 sends ultrasound wave, another ultrasonic transducer B 6-2 as shown in Figure 1, 6-4, 6-6 is used for receiving ultrasound wave, computing machine is recorded ultrasonic transducer A transmitting ultrasound wave automatically, and to ultrasonic transducer B, to receive hyperacoustic time be ultrasound wave time during following current propagation in pipeline section.Then, industrial computer is controlled multichannel pulse signal generator and is sent pulse signal.Make each the transducer B of group in ultrasonic transducer 6-2,6-4,6-6 as shown in Figure 1 send ultrasound wave, another ultrasonic transducer A 6-1,6-3,6-5 as shown in Figure 1 receives ultrasound wave, and records ultrasonic transducer B transmitting ultrasound wave and to ultrasonic transducer A, receive hyperacoustic time both ultrasound wave time during adverse current propagation the time difference of utilization in pipeline section were sent out principle and calculate three groups of ultrasonic transducers and record the flow in pipeline.Gather pressure unit 2, temperature transmitter 7 can be uploaded to industrial computer by collecting temperature pressure data, carries out temperature pressure compensation calculating simultaneously.
Figure 436271DEST_PATH_IMAGE004
the flow that the three pairs of ultrasonic transducers in step 1 are recorded is analyzed relatively, compare three pairs of flows that ultrasonic transducer records, compare and measure 1 group with measure 2 groups of flows of surveying, when if error is in allowed band between the two, the average of the flow that these two groups of ultrasonic transducers record is flow in pipeline.If not in scope, analyze and compare and measure 1 group and the flows of measuring 3 groups of surveys, when if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 2 groups of ultrasonic transducers are measured in prompting wrong, if not in scope, analyze compare and measure 2 groups with 3 groups of flows that record of measurement, if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 1 group of ultrasonic transducer is measured in prompting wrong, if do not redeterminate in scope.If surpass three times from new mensuration number of times, report to the police.
As shown in Figure 2, ultrasonic measurement system is mainly by machine element and testing circuit board, and testing circuit board adopts TCF6401 card, PR401 card, the AD card of U.S. CD international technology firm research and development.Wherein every PR401 comprises 8 interfaces, and every two interfaces are 1 passage, and 4 passages, are responsible for transmitting and receive signal altogether.TCF6401 is responsible for sequential, control, the signal of every PR401 is carried out to filtering processing and passes to AD card, and AD card is responsible for simulating signal to be converted into digital data transmission to computing machine.
Wherein AD card, TCF6401, PR401 need be inserted on base plate in order, wherein between every PR401 and TCF6401, will connect with winding displacement and copperhead wire.Between TCF6401 and AD card, need to be connected with two lemo connector wires.
Computing machine is by the data of data collecting card collecting temperature transmitter and pressure unit.
As Fig. 3, be calibrating function realization flow figure.By local PC, open login system, after authority is judged successfully, enter and detect interface, otherwise cannot enter.
System starts automatically to control the temperature, pressure data that three pairs of ultrasonic transducers carry out the flow in measuring channel and read temperature, pressure unit.The flow that three pairs of ultrasonic transducers of system software comparison record, compare and measure 1 group with measure 2 groups of flows of surveying, if when error is in allowed band between the two, the average of the flow that these two groups of ultrasonic transducers record is flow in pipeline.If not in scope, analyze and compare and measure 1 group and the flows of measuring 3 groups of surveys, when if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 2 groups of ultrasonic transducers are measured in prompting wrong, if not in scope, analyze compare and measure 2 groups with 3 groups of flows that record of measurement, if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 1 group of ultrasonic transducer is measured in prompting wrong, if do not redeterminate in scope.If surpass three times from new mensuration number of times, report to the police.

Claims (2)

1. the dynamic transfer device of multichannel ultrasonic flow standard, comprises filtrator, rectifier, pressure unit, temperature transmitter, prover section, multichannel ultrasonic measurement system, it is characterized in that:
The entrance of filtrator is connected with exterior line by the first standard flange, and the outlet of filtrator is connected with rectifier entrance, and the outlet of rectifier is connected with prover section phase entrance, and prover section outlet is connected with exterior line by the second standard flange; Pressure unit is arranged between filter outlet and prover section entrance, and temperature transmitter is arranged between prover section outlet and the second standard flange; Prover section outside is also provided with multichannel ultrasonic measurement system;
Described multichannel ultrasonic measurement system, comprises three pairs of ultrasonic transducers, multichannel pulse signal generation capture card, industrial computer; Three pairs of ultrasonic transducers are divided into 1 group of measurement, 2 groups of measurements, 3 groups of measurements and are arranged on prover section outer wall with fixed angle; Every a pair of ultrasonic transducer is transceiver structure, and the correspondence mutually replacing is as transmitting and receiving element, and is connected with multichannel pulse signal generation capture card by connecting line, and multichannel pulse signal generation capture card inserts in industrial computer respective card slot.
2. right to use requires the method for device described in 1, it is characterized in that comprising the steps:
Figure 2013107187118100001DEST_PATH_IMAGE001
the time when time when gathering ultrasound wave that three pairs of ultrasonic transducers send simultaneously following current is propagated in pipeline section by industrial computer and adverse current are propagated, and utilize the time difference to send out principle to calculate three pairs of ultrasonic transducers and record the flow in pipeline;
Figure 981084DEST_PATH_IMAGE002
three pairs of flows that ultrasonic transducer records relatively, compare and measure 1 group with measure 2 groups of flows of surveying, if when error is in allowed band between the two, the average of the flow that these two groups of ultrasonic transducers record is the interior flow of pipeline; If not in scope, analyze and compare and measure 1 group and the flows of measuring 3 groups of surveys, when if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 2 groups of ultrasonic transducers are measured in prompting wrong, if not in scope, analyze compare and measure 2 groups with 3 groups of flows that record of measurement, if error is in allowed band between the two, the average of these the two groups flows of surveying is flow in pipeline, and whether 1 group of ultrasonic transducer is measured in prompting wrong, if do not redeterminate in scope; If redeterminate number of times, surpass three times, report to the police.
CN201310718711.8A 2013-12-20 2013-12-20 Multichannel ultrasonic flow standard dynamic transmission device and application method thereof Pending CN103674193A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106092229A (en) * 2016-06-16 2016-11-09 浙江大学 Useful signal Blind extracting method and apparatus for ultrasonic gas flowmeter
CN106404085A (en) * 2015-08-10 2017-02-15 杭州思筑智能设备有限公司 Ultrasonic wave flowmeter
CN106908104A (en) * 2015-12-23 2017-06-30 江苏迈拓智能仪表有限公司 A kind of inserted-link type ultrasonic flow sensor structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1668900A (en) * 2002-06-25 2005-09-14 流体元件国际公司 Method and apparatus for validating the accuracy of a flowmeter
CN201355261Y (en) * 2008-11-12 2009-12-02 松下电器产业株式会社 Multi-layered fluid passage component and ultrasonic fluid measuring device utilizing same
CN102812281A (en) * 2010-03-11 2012-12-05 流动科技株式会社 Method for precisely and reliably controlling liquid level of pressure tank with multiple sensors
CN103267549A (en) * 2013-04-26 2013-08-28 北京艾科瑞能源科技有限公司 Ultrasonic flow meter
CN103453956A (en) * 2012-05-02 2013-12-18 丹尼尔测量和控制公司 Temperature verification for ultrasonic flow meters

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1668900A (en) * 2002-06-25 2005-09-14 流体元件国际公司 Method and apparatus for validating the accuracy of a flowmeter
CN201355261Y (en) * 2008-11-12 2009-12-02 松下电器产业株式会社 Multi-layered fluid passage component and ultrasonic fluid measuring device utilizing same
CN102812281A (en) * 2010-03-11 2012-12-05 流动科技株式会社 Method for precisely and reliably controlling liquid level of pressure tank with multiple sensors
CN103453956A (en) * 2012-05-02 2013-12-18 丹尼尔测量和控制公司 Temperature verification for ultrasonic flow meters
CN103267549A (en) * 2013-04-26 2013-08-28 北京艾科瑞能源科技有限公司 Ultrasonic flow meter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106404085A (en) * 2015-08-10 2017-02-15 杭州思筑智能设备有限公司 Ultrasonic wave flowmeter
CN106404085B (en) * 2015-08-10 2019-02-19 杭州思筑智能设备有限公司 A kind of ultrasonic flowmeter
CN106908104A (en) * 2015-12-23 2017-06-30 江苏迈拓智能仪表有限公司 A kind of inserted-link type ultrasonic flow sensor structure
CN106092229A (en) * 2016-06-16 2016-11-09 浙江大学 Useful signal Blind extracting method and apparatus for ultrasonic gas flowmeter
CN106092229B (en) * 2016-06-16 2018-12-04 浙江大学 For the useful signal Blind extracting method and apparatus of ultrasonic gas flowmeter

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