CN104019860A - Flowmeter integrating electromagnetism and ultrasonic and use method of flowmeter - Google Patents

Flowmeter integrating electromagnetism and ultrasonic and use method of flowmeter Download PDF

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Publication number
CN104019860A
CN104019860A CN201310716498.7A CN201310716498A CN104019860A CN 104019860 A CN104019860 A CN 104019860A CN 201310716498 A CN201310716498 A CN 201310716498A CN 104019860 A CN104019860 A CN 104019860A
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CN
China
Prior art keywords
fluid flow
flow
ultrasonic
ultrasonic transducer
transducer assembly
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Application number
CN201310716498.7A
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Chinese (zh)
Inventor
聂志刚
孙向东
毛德丰
楼承云
金裕坚
冯奔科
赵景红
龚昌晗
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浙江迪元仪表有限公司
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Application filed by 浙江迪元仪表有限公司 filed Critical 浙江迪元仪表有限公司
Priority to CN201310716498.7A priority Critical patent/CN104019860A/en
Publication of CN104019860A publication Critical patent/CN104019860A/en

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Abstract

The invention discloses a flowmeter integrating electromagnetism and ultrasonic. The outside of a guide pipe is provided with two magnetic poles used for generating magnetic fields and two electrodes used for cutting magnetic lines of force, each magnetic pole is wound with coils, the two magnetic poles are arranged symmetrical with the center of the guide pipe, the two electrodes are arranged symmetrical with the center of the guide pipe, and the plane where the centers of the two electrodes are located is perpendicular to the plane where the centers of the two magnetic poles are located. The outside of the guide pipe is further provided with an upper stream ultrasonic transducer assembly and a lower stream ultrasonic transducer assembly, the upper stream ultrasonic transducer assembly and the lower stream ultrasonic transducer assembly are arranged symmetrical with the center of the guide pipe, and the included angle formed by the plane where the center of the upper stream ultrasonic transducer assembly and the center of the lower stream ultrasonic transducer assembly are located and the plane where the centers of the two electrodes are located ranges from 30 degrees to 60 degrees. Flow of fluids in the guide pipe can be measured through the flowmeter integrating electromagnetism and ultrasonic, and an accurate flow value can be obtained through judgment made according to two flow values.

Description

Flowmeter and the using method thereof of a kind of electromagnetism and ultrasonic integration design
Technical field
The present invention relates to a kind of technology that improves flow measurement accuracy of measurement, refer in particular to flowmeter and the using method thereof of a kind of electromagnetism and ultrasonic integration design.
Background technology
Electromagnetic flowmeter is according to Faraday's electromagnetic induction law, to carry out the flowmeter of flow measurement.The advantage of electromagnetic flowmeter is that crushing is minimum, and measurable flow weight range is large.More than the ratio of maximum flow and minimum flow is generally 30:1, applicable industrial caliber wide ranges, maximum can reach 3m, output signal and measured flux are linear, degree of accuracy is higher, can measure the fluid flow of acid, alkali, salt solusion, water, sewage, corrosive liquids and mud, ore pulp, the paper pulp etc. of conductivity >=5 μ s/cm.But it can not measurement gas, the flow of steam and the lower liquid medium (as pure water) of conductivity.
Ultrasonic flow meter is a kind of contactless instrument, and the rate-of flow that it both can measure Large Diameter Pipeline also can be for the measurement of the medium that is difficult for contact and observes.Its accuracy of measurement is very high, is subject to hardly the interference of the various parameters of measured medium, especially can solve other instrument can not the flow measurement problem of severe corrosive, non-conductive, radioactivity and inflammable and explosive medium.Ultrasonic flow meter is subject to outside the restriction of the coupling material heatproof degree between ultrasonic wave transducer aluminium and transducer and pipeline in the temperature range of measurable flow body now, in pipeline liquid medium, as exists a large amount of bubbles can cause measuring unstable, and flow deviation is larger.
But when pipeline medium conductivity is low, and while there is bubble in pipeline, when electromagnetic flowmeter and the independent type selecting of ultrasonic flow, just there is defect.
China Patent Publication No. CN203249653U, open day on October 23rd, 2013, name is called in the utility model patent of " intelligent open-channel meter " and discloses a kind of intelligent open-channel meter, the Flow Measurement Display Meter that connects power supply is electrically connected to ultrasonic liquid leveller by tank gage input terminal and tank gage cable, by sensor input terminal and sensor electrical cable, be connected with electromagnetism flow velocity sensor electrical again, this Flow Measurement Display Meter provides stable exciting current for electromagnetism flow sensor, and provide reliable direct supply to ultrasonic liquid leveller, by electromagnetism flow sensor, detected the induced potential being directly proportional to flow velocity in tested flow section, through sensor electrical cable, pass to Flow Measurement Display Meter, meanwhile, ultrasonic liquid leveller by the bathymetric data at the flow section place measuring with 4 20mA signal forms, through tank gage cable, send Flow Measurement Display Meter to, this Flow Measurement Display Meter adds by the key that arranges on converter, patrol and add key, patrol and subtract the mean flow rate that the basic structure dimensional data of tested flow section that key and ESC Escape insert in advance and the mathematical model of converter inside are calculated this flow section, instantaneous delivery, again according to time cumulation, result is shown by LCDs.Weak point is, the ultrasonic liquid leveller Intelligent Measurement liquid level of this flowmeter and can not tracer liquid flow, what ultrasound wave played is only supplementary means, and ultrasonic liquid leveller and electromagnetism flow sensor can not combine, take up room larger, use inconvenience.
  
Summary of the invention
The object of the invention is to overcome in prior art when pipeline medium conductivity is low, and while there is bubble in pipeline, flowmeter can not Measurement accuracy flow defect, flowmeter and the using method thereof of a kind of electromagnetism and ultrasonic integration design are provided, by this flowmeter, can accurately measure fluid flow in various situations.
The object of the invention is to be achieved by following technical proposals:
The flowmeter of a kind of electromagnetism and ultrasonic integration design, comprise conduit, conduit peripheral hardware is useful on and produces two magnetic poles in magnetic field and for two electrodes of cutting magnetic line, each magnetic pole is all wound with coil, two magnetic poles are symmetrical in catheter center, two electrodes in catheter center symmetrical and two residing planes of electrode centers and two residing planes of pole center orthogonal; Conduit is also provided with upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly outward, upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly are symmetrical in catheter center, and the scope of the angle of ultrasonic transducer assembly center, upstream and the residing plane in ultrasonic transducer assembly center, downstream and two residing plane formations of electrode centers is 30 degree-60 degree; Electrode connects as Electromagnetic Flow testing circuit, ultrasonic transducer assembly connects ultrasonic flow detection circuit, Electromagnetic Flow testing circuit is connected with ultrasonic flow detection circuit, Electromagnetic Flow testing circuit is also connected comparer with ultrasonic flow detection circuit simultaneously, and comparer is also connected with display screen.
Two magnetic poles, form electromagnetic flow transducers with coil and two electrodes of magnetic pole coiling, upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly form ultrasonic flow sensor, the equal measurable flow body of electromagnetic flow transducer and ultrasonic flow sensor flow.The scope of the angle of ultrasonic transducer assembly center, upstream and the residing plane in ultrasonic transducer assembly center, downstream and two residing plane formations of electrode centers is designs of 30 degree-60 degree, avoided ultrasonic flow sensor to insert after pipeline, the impact of ultrasonic flow sensor shell on liquid flow field, thus the measurement of electromagnetic sensor affected.
As a kind of preferred version, the flowmeter of electromagnetism and ultrasonic integration design also comprises yoke, and yoke is socketed in outside conduit, and two magnetic poles, two electrodes and two ultrasonic transducer assemblies are all arranged in the cavity forming between conduit and yoke.The effect of yoke is to avoid the impact of external magnetic field on flowmeter survey, has improved the degree of accuracy of flowmeter survey.
As a kind of preferred version, in conduit, be provided with insulation lining.Insulation lining has prevented that induced signal voltage is by metal tube short circuit.
A using method for the flowmeter of battery and ultrasonic integration design, is characterized in that, comprises the following steps:
Step 1, flowmeter is started working, and fluid flows through conduit, and Electromagnetic Flow testing circuit detects several times fluid flow Q1, and ultrasonic flow detects several times electric circuit inspection fluid flow Q2.
The formula that fluid flow Q1 calculates is Q1=KBDV, and wherein, K is fixed proportion coefficient, and B is magnetic field intensity, and D is the diameter of conduit, and V is the flow velocity of fluid.
The formula that fluid flow Q2 calculates is
Wherein v is flow velocity, and D is internal diameter of the pipeline, and the genial T of T is contrary to be respectively the ultrasound wave concurrent-countercurrent travel-time, and θ is the angle of travel path and flow direction.
Step 2, if when the repeatability of fluid flow Q1, fluid flow Q2 all meets the requirements, represents that fluid flow Q1 and fluid flow Q2 stability are better, jumps to step 3; If fluid flow Q1 repeatability all meets the requirements, and fluid flow Q2 repeatability is when undesirable, jumps to step 4; If fluid flow Q1 repeatability is all undesirable, and fluid flow Q2 repeatability is when meet the requirements, and jumps to step 5; If when the repeatability of fluid flow Q1, fluid flow Q2 is all undesirable, jump to step 6;
Step 3, fluid flow Q1 fluid flow Q2 revises, display screen output display fluid flow Q1 and revised fluid flow Q2;
Step 4, display screen output display fluid flow Q1 shows that Q2 is abnormal simultaneously;
Step 5, display screen output display fluid flow Q2 shows that Q1 is abnormal simultaneously;
Step 6, display screen output display fluid flow Q1 and fluid flow Q2 are all abnormal.
The invention has the beneficial effects as follows, the flowmeter of electromagnetism and ultrasonic integration design is the flow of measuring guide inner fluid jointly, and can judge according to the numerical value of two flows, obtain accurate flow number, simultaneously, flow rate calculation when this flowmeter can be applicable to there is bubble in the low and pipeline of pipeline medium conductivity, applicability is stronger.
Accompanying drawing explanation
Fig. 1 is a kind of schematic cross-section of the present invention.
Fig. 2 is circuit theory connection layout of the present invention.
Wherein: 1, magnetic pole, 2, coil, 3, yoke, 4, electrode, 5, upstream ultrasonic transducer assembly, 6, downstream ultrasonic transducer assembly, 7, insulation lining, 8, conduit, 9, Electromagnetic Flow testing circuit, 10, ultrasonic flow detection circuit, 11, comparer, 12, display screen.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment: the flowmeter of a kind of electromagnetism and ultrasonic integration design, its schematic cross-section as shown in Figure 1, comprise conduit, in conduit, be provided with insulation lining, conduit peripheral hardware is useful on and produces two magnetic poles in magnetic field and for two electrodes of cutting magnetic line, each magnetic pole is all wound with coil, and two magnetic poles are symmetrical in catheter center, two electrodes in catheter center symmetrical and two residing planes of electrode centers and two residing planes of pole center orthogonal; Conduit is also provided with upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly outward, upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly are symmetrical in catheter center, and the angle of ultrasonic transducer assembly center, upstream and the residing plane in ultrasonic transducer assembly center, downstream and two residing plane formations of electrode centers is 45 degree; Yoke is socketed in outside conduit, and two magnetic poles, two electrodes and two ultrasonic transducer assemblies are all arranged in the cavity forming between conduit and yoke.
The circuit theory connection layout of the flowmeter of electromagnetism and ultrasonic integration design as shown in Figure 2, electrode connects Electromagnetic Flow testing circuit, ultrasonic transducer assembly connects ultrasonic flow detection circuit, Electromagnetic Flow testing circuit is connected with ultrasonic flow detection circuit, Electromagnetic Flow testing circuit is also connected comparer with ultrasonic flow detection circuit simultaneously, and comparer is also connected with display screen.
The using method of the flowmeter of battery and ultrasonic integration design comprises the following steps:
Step 1, flowmeter is started working, and fluid flows through conduit, and Electromagnetic Flow testing circuit detects several times fluid flow Q1, and ultrasonic flow detects several times electric circuit inspection fluid flow Q2.
Step 2, if when the repeatability of fluid flow Q1, fluid flow Q2 all meets the requirements, represents that fluid flow Q1 and fluid flow Q2 stability are better, jumps to step 3; If fluid flow Q1 repeatability all meets the requirements, and fluid flow Q2 repeatability is when undesirable, jumps to step 4; If fluid flow Q1 repeatability is all undesirable, and fluid flow Q2 repeatability is when meet the requirements, and jumps to step 5; If when the repeatability of fluid flow Q1, fluid flow Q2 is all undesirable, jump to step 6;
Step 3, fluid flow Q1 fluid flow Q2 revises, display screen output display fluid flow Q1 and revised fluid flow Q2;
Step 4, display screen output display fluid flow Q1 shows that Q2 is abnormal simultaneously;
Step 5, display screen output display fluid flow Q2 shows that Q1 is abnormal simultaneously;
Step 6, display screen output display fluid flow Q1 and fluid flow Q2 are all abnormal.
  

Claims (5)

1. the flowmeter of an electromagnetism and ultrasonic integration design, comprise conduit, it is characterized in that, conduit peripheral hardware is useful on and produces two magnetic poles in magnetic field and for two electrodes of cutting magnetic line, each magnetic pole is all wound with coil, two magnetic poles are symmetrical in catheter center, two electrodes in catheter center symmetrical and two residing planes of electrode centers and two residing planes of pole center orthogonal; Conduit is also provided with upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly outward, upstream ultrasonic transducer assembly and downstream ultrasonic transducer assembly are symmetrical in catheter center, and the scope of the angle of ultrasonic transducer assembly center, upstream and the residing plane in ultrasonic transducer assembly center, downstream and two residing plane formations of electrode centers is 30 degree-60 degree; Electrode connects Electromagnetic Flow testing circuit, ultrasonic transducer assembly connects ultrasonic flow detection circuit, Electromagnetic Flow testing circuit is connected with ultrasonic flow detection circuit, Electromagnetic Flow testing circuit is also connected comparer with ultrasonic flow detection circuit simultaneously, and comparer is also connected with display screen.
2. the flowmeter that a kind of electromagnetism according to claim 1 and ultrasonic integration design, it is characterized in that, also comprise yoke, yoke is socketed in outside conduit, and two magnetic poles, two electrodes and two ultrasonic transducer assemblies are all arranged in the cavity forming between conduit and yoke.
3. the flowmeter of a kind of electromagnetism according to claim 1 and 2 and ultrasonic integration design, is characterized in that, is provided with insulation lining in described conduit.
4. a using method for the flowmeter of battery and ultrasonic integration design, is characterized in that, comprises the following steps:
Step 1, flowmeter is started working, and fluid flows through conduit, and Electromagnetic Flow testing circuit detects several times fluid flow Q1, and ultrasonic flow detects several times electric circuit inspection fluid flow Q2.
5. step 2, if when the repeatability of fluid flow Q1, fluid flow Q2 all meets the requirements, represents that fluid flow Q1 and fluid flow Q2 stability are better, jumps to step 3; If fluid flow Q1 repeatability all meets the requirements, and fluid flow Q2 repeatability is when undesirable, jumps to step 4; If fluid flow Q1 repeatability is all undesirable, and fluid flow Q2 repeatability is when meet the requirements, and jumps to step 5; If when the repeatability of fluid flow Q1, fluid flow Q2 is all undesirable, jump to step 6;
Step 3, fluid flow Q1 fluid flow Q2 revises, display screen output display fluid flow Q1 and revised fluid flow Q2;
Step 4, display screen output display fluid flow Q1 shows that Q2 is abnormal simultaneously;
Step 5, display screen output display fluid flow Q2 shows that Q1 is abnormal simultaneously;
Step 6, display screen output display fluid flow Q1 and fluid flow Q2 are all abnormal.
CN201310716498.7A 2013-12-23 2013-12-23 Flowmeter integrating electromagnetism and ultrasonic and use method of flowmeter CN104019860A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105424340A (en) * 2015-11-23 2016-03-23 北京林业大学 Rapid field determinator for wafting evaporation losses for sprinkling irrigation
DE102016116072A1 (en) 2016-08-29 2018-03-01 Endress + Hauser Flowtec Ag A method for detecting foreign bodies in an electromagnetic flowmeter, a magnetic inductive flowmeter, an arrangement with an electromagnetic flowmeter and a filling system with an arrangement
DE102017110736A1 (en) * 2017-05-17 2018-11-22 Bürkert SAS measuring device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54143257A (en) * 1978-04-28 1979-11-08 Toshiba Corp Electromagnetic flowmeter
JPS63101819U (en) * 1986-12-23 1988-07-02
CN102322907A (en) * 2011-05-17 2012-01-18 重庆梅安森科技股份有限公司 Integrated intelligent gas flow meter with double flow measuring heads
CN103398748A (en) * 2013-07-25 2013-11-20 浙江省计量科学研究院 Self-calibrating water-intake metering unit based on composite electromagnetic and ultrasonic principle
CN203657868U (en) * 2013-12-23 2014-06-18 浙江迪元仪表有限公司 Electromagnetic and ultrasonic integrated-design flow meter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54143257A (en) * 1978-04-28 1979-11-08 Toshiba Corp Electromagnetic flowmeter
JPS63101819U (en) * 1986-12-23 1988-07-02
CN102322907A (en) * 2011-05-17 2012-01-18 重庆梅安森科技股份有限公司 Integrated intelligent gas flow meter with double flow measuring heads
CN103398748A (en) * 2013-07-25 2013-11-20 浙江省计量科学研究院 Self-calibrating water-intake metering unit based on composite electromagnetic and ultrasonic principle
CN203657868U (en) * 2013-12-23 2014-06-18 浙江迪元仪表有限公司 Electromagnetic and ultrasonic integrated-design flow meter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105424340A (en) * 2015-11-23 2016-03-23 北京林业大学 Rapid field determinator for wafting evaporation losses for sprinkling irrigation
CN105424340B (en) * 2015-11-23 2018-01-05 北京林业大学 Evaporation loss field Quick testing instrument is flown away in one kind sprinkling irrigation
DE102016116072A1 (en) 2016-08-29 2018-03-01 Endress + Hauser Flowtec Ag A method for detecting foreign bodies in an electromagnetic flowmeter, a magnetic inductive flowmeter, an arrangement with an electromagnetic flowmeter and a filling system with an arrangement
DE102017110736A1 (en) * 2017-05-17 2018-11-22 Bürkert SAS measuring device
US10739172B2 (en) 2017-05-17 2020-08-11 Buerkert S.A.S. Measuring device

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Application publication date: 20140903