CN106443059A - Fluid velocity measurement method, fluid metering method and flowmeter - Google Patents
Fluid velocity measurement method, fluid metering method and flowmeter Download PDFInfo
- Publication number
- CN106443059A CN106443059A CN201610807075.XA CN201610807075A CN106443059A CN 106443059 A CN106443059 A CN 106443059A CN 201610807075 A CN201610807075 A CN 201610807075A CN 106443059 A CN106443059 A CN 106443059A
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- China
- Prior art keywords
- ultrasonic
- ultrasonic transducer
- detected fluid
- fluid
- signal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to the field of fluid metering, and particularly to f fluid velocity measurement method, a fluid metering method and a flowmeter. According to the method for measuring velocity and flow of tested fluid, propagation velocity of an ultrasonic wave in the tested fluid is not used in a measurement process, and only measurement for a time length in transmitting an ultrasonic signal by two ultrasonic transducers through the tested fluid is required. According to the method provided by the invention, even on the condition of different kinds of fluid (such as natural gas with different components, different temperatures and the like), the actual velocity or flow value of the tested fluid can be acquired without influence by the actual propagation velocity of the ultrasonic wave, and high metering accuracy is ensured.
Description
Technical field
The present invention relates to fluid metering field, more particularly to a kind of fluid velocity measuring method and fluid metering method and stream
Gauge.
Background technology
Ultrasonoscope scale is due to its all electronic structure, the construction featuress of mechanical transmission device, and during operation, mechanical is made an uproar
Sound, is not affected by mechanical wear and fault, does not adopt magnetic strength element, and metering is difficult affected by magnetic fields, compares stem-winder, in body
On product, precision, repeatability and life-span, maintenance, in terms of intelligent extension, suffer from unrivaled advantage.
But as, under different fluid conditions, the spread speed of ultrasound wave is different, and traditional ultrasonoscope scale
Metering method is by formulaCalculate, as shown in figure 1, in formula, C is ultrasound wave by the propagation speed in side liquid
Degree, LLIt is one way propagation distance of the ultrasound wave in runner, Δ T is ultrasound wave different directions transmission time difference；Thus we see
Arrive, the calculation need to use spread speed of the ultrasound wave in detected fluid, but, general gauge table on a production line can
Calibration is measured using the fluid (as air or specific components combustion gas) of specific components, and measured stream is measured when actually used
Body is the detected fluid (such as natural gas of different temperatures, different component etc.) with entirely different condition completely on production line again, from
And cause to measure the ultrasonic velocity mistake that calibration is fixed, and then cause metric results inaccurate.
Content of the invention
It is an object of the invention to overcome in prior art to need in ultrasonic fluid measurement mode to use ultrasound by effluent
Spread speed in body, and then as calibrating fluid and reality are caused that ultrasonic actual propagation speed is different to be caused by side liquid is different
The problem of measurement error, provide a kind of do not apply ultrasound draw detected fluid flow velocity by the spread speed in detected fluid
Measuring method.
In order to realize foregoing invention purpose, the invention provides technical scheme below：
A kind of fluid velocity measuring method, comprises the steps of：
Detected fluid is allowed by a tubulose runner；
First ultrasonic transducer sends the first ultrasonic signal by detected fluid to the second ultrasonic transducer and remembers
Record first ultrasonic signal passing time T1；
Second ultrasonic transducer sends the second ultrasonic signal by detected fluid to the first ultrasonic transducer and remembers
Record the passing time T of second ultrasonic signal2；
According to formulaCalculate detected fluid flow velocity, wherein, LcIt is ultrasonic signal from the first ultrasound
The distance that wave transducer center is propagated to the second ultrasonic transducer center；L be ultrasound wave in runner transfer route in runner
Projected length on wall.
Present invention simultaneously provides a kind of fluid metering method, comprises the steps of：
The step of comprising detected fluid flow velocity V is measured using fluid velocity measuring method as above；
The step of comprising detected fluid flow is calculated using formula Q=V × S, wherein, Q characterizes detected fluid flow, and S is
The area of section of tubulose runner.
The present invention also provides a kind of ultrasonic flowmeter, including,
Tubulose runner, for passing through detected fluid；
First ultrasonic transducer, the second ultrasonic transducer, first ultrasonic transducer, the second ultrasonic wave transducer
Device is arranged on the tubulose runner both sides or homonymy, and for transmitting, received ultrasonic signal mutually, the ultrasonic signal passes through quilt
Fluid measured；
Microprocessor, is connected with first ultrasonic transducer, the second ultrasonic transducer, sends ultrasound for controlling
The time of ripple, frequency, and the first ultrasonic transducer, the sensing signal of the second ultrasonic transducer is received, calculate the first ultrasound
The first ultrasonic signal that wave transducer sends is transferred to the time T of the second ultrasonic transducer1, and the second ultrasonic wave transducer
The second ultrasonic signal that device sends is transferred to the time T of the first ultrasonic transducer2, and according to T1、T2Calculate detected fluid
Flow velocity V.
Further, the microprocessor is according to formulaCalculate detected fluid flow velocity, wherein, Lc
It is distance that ultrasonic signal is propagated from the first ultrasonic transducer center to the second ultrasonic transducer center；L is ultrasound wave
Projected length of the transfer route on flow path wall in runner.
Further, the microprocessor calculates detected fluid flow always according to formula Q=V × S, and wherein, Q characterizes tested
Fluid flow, S is the area of section of tubulose runner.
Compared with prior art, beneficial effects of the present invention：A kind of measurement detected fluid flow velocity and stream that the present invention is provided
The method of amount will not be applied to spread speed of the ultrasound wave in detected fluid in measurement process, only measure two ultrasound wave
Transducer is propagated by detected fluid the time of ultrasonic signal, i.e., the method that the present invention is provided, even if in different fluids
Under condition (such as the natural gas of different component, different temperatures etc.), all can not be affected to obtain in fact by ultrasound wave actual propagation speed
The detected fluid velocity amplitude on border or flow value, it is ensured that the accuracy of metering.
Description of the drawings：
Fig. 1 is instrumentation plan in prior art.
Detected fluid flow-speed measurement schematic diagram in Fig. 2 specific embodiment of the invention.
The structure of ultrasonic flowmeter block diagram that Fig. 3 is provided for the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.But this should not be interpreted as this
The scope for inventing above-mentioned theme is only limitted to below example, and all technology that is realized based on present invention belong to the present invention
Scope.
Embodiment 1：As shown in Fig. 2 the present embodiment provides a kind of fluid velocity measuring method, comprise the steps of：
Detected fluid is allowed by a tubulose runner 30；In the present embodiment, 30 rectangular cross-section of tubulose runner, the rectangle cuts
A height of H in face, a width of D；And in other embodiment, the section of the tubulose runner 30 can also be circular, square, oval
Shape etc..
First ultrasonic transducer 10 sends the first ultrasonic signal by detected fluid to the second ultrasonic transducer 20
And record first ultrasonic signal passing time T1；
Second ultrasonic transducer 20 sends the second ultrasonic signal by detected fluid to the first ultrasonic transducer 10
And record the passing time T of second ultrasonic signal2；In ultrasonic measurement field, it is thus well known that, the first ultrasound wave is believed
Number should along detected fluid flow direction, α is propagated at an angle, and the second ultrasonic signal is inversely passed with the first ultrasonic signal
Broadcast, if θ=90- is α, 90 ° of 0 ° of ＜ θ ＜.
According to formulaCalculate detected fluid flow velocity, wherein, LcIt is ultrasonic signal from the first ultrasound
The distance that 10 center of wave transducer is propagated to 20 center of the second ultrasonic transducer；L is that ultrasound wave transfer route in runner exists
Projected length on flow path wall.
The reasoning process of the formula is as follows：
As usual first ultrasonic transducer 10 is to set at an angle with the surface of emission of the second ultrasonic transducer 20
Put in 30 both sides of tubulose runner or side, therefore in fact, LcIncluding the first ultrasonic signal from the first ultrasonic transducer 10
In outer the first section that propagates of tubulose runner 30, the second section that is propagated by side liquid in tubulose runner 30 after transmitting, in pipe
Shape runner 30 gets to the second ultrasonic transducer 20 behind outer the 3rd section that propagates, generally, for certainty of measurement, the first via
Section and the second section are apart from equal and length is M, and the second road section length that propagates in by side liquid is LL, i.e. Lc=2M+
LL, l is projected length of second section on flow path wall, i.e. l=LLcosθ；If the first ultrasonic signal is in the second section
Propagation time be t1, propagation time of second ultrasonic signal in the second section is t2, then just have：
Wherein, C is spread speed of the ultrasound wave in detected fluid；Have again,
Can draw from (3) and (4)
Due to C ＞ ＞ V, (spread speed C of ultrasound wave generally in 400m/s or so, and the flow velocity of fluid is generally in 4～9m/
S), LL＞ 2M (distance that ultrasound wave is propagated by side liquid in runner typically 60～80mm, M length typically 8～
15mm), therefore (CLL+2MC)2＞ ＞ (2MVcos θ)2, so, we are reduced to formula (5)：
So as to draw detected fluid flow velocity
Although T1、T2Actual measured value can be propagated under different fluid condition (temperature, pressure, component) by ultrasound wave
The impact of speed, but the measured value that can be seen that final V by formula (7) is not affected by the spread speed, is thereby guaranteed that
Do not affected by fluid condition, fluid components using present aspect measurement fluid velocity, and then improve the adaptation of measuring method
Property.
Embodiment 2：The present embodiment provides a kind of fluid metering method, comprises the steps of：
The step of comprising detected fluid flow velocity V is measured using fluid velocity measuring method as described in Example 1；
The step of comprising detected fluid flow is calculated using formula Q=V × S, wherein, Q characterizes detected fluid flow, and S is
The area of section of tubulose runner 30.As, in embodiment, fluid line section is a height of H, the rectangle of a width of D, therefore measured stream
Body flow
Embodiment 3：As shown in figure 3, the present embodiment provides a kind of ultrasonic flowmeter, including,
Tubulose runner 30, for passing through detected fluid；Detected fluid can be such as water, oil, natural gas；When detected fluid is
During natural gas, the flow that the present embodiment is provided is calculated as gas meter
First ultrasonic transducer 10, the second ultrasonic transducer 20, the 10, second ultrasound of first ultrasonic transducer
Wave transducer 20 is arranged on 30 both sides of tubulose runner or homonymy, for transmitting, received ultrasonic signal mutually, the ultrasound wave
Signal passes through detected fluid；
Microprocessor 40, is connected with first ultrasonic transducer 10, the second ultrasonic transducer 20, is sent out for control
Time, the frequency of ultrasound wave is sent, and the first ultrasonic transducer 10, the sensing signal of the second ultrasonic transducer 20 is received, meter
The first ultrasonic signal for calculating the transmission of the first ultrasonic transducer 10 is transferred to the time T of the second ultrasonic transducer 201, and
The second ultrasonic signal that second ultrasonic transducer 20 sends is transferred to the time T of the first ultrasonic transducer 102, and according to
T1、T2Calculate the flow velocity V of detected fluid.
The microprocessor 40 is according to formulaCalculate detected fluid flow velocity, wherein, LcIt is ultrasound wave
The distance that signal is propagated from 10 center of the first ultrasonic transducer to 20 center of the second ultrasonic transducer；L is ultrasound wave in stream
Projected length of the transfer route on flow path wall in road.
The microprocessor 40 calculates detected fluid flow always according to formula Q=V × S, and wherein, Q characterizes detected fluid stream
Amount, S is the area of section of tubulose runner 30.
Claims (5)
1. a kind of fluid velocity measuring method, it is characterised in that comprise the steps of：
Detected fluid is allowed by a tubulose runner；
First ultrasonic transducer sends the first ultrasonic signal by detected fluid to the second ultrasonic transducer and records this
First ultrasonic signal passing time T1；
Second ultrasonic transducer sends the second ultrasonic signal by detected fluid to the first ultrasonic transducer and records this
The passing time T of the second ultrasonic signal2；
According to formulaCalculate detected fluid flow velocity, wherein, LcIt is ultrasonic signal from the first ultrasonic waves
The distance that Neng Qi center is propagated to the second ultrasonic transducer center；L be ultrasound wave in runner transfer route on flow path wall
Projected length.
2. a kind of fluid metering method, it is characterised in that comprise the steps of：
The step of comprising detected fluid flow velocity V is measured using fluid velocity measuring method as claimed in claim 1；Comprising employing
The step of formula Q=V × S calculates detected fluid flow, wherein, Q characterizes detected fluid flow, and S is the section face of tubulose runner
Product.
3. a kind of ultrasonic flowmeter, it is characterised in that include,
Tubulose runner, for passing through detected fluid；
First ultrasonic transducer, the second ultrasonic transducer, first ultrasonic transducer, the second ultrasonic transducer set
Put in the tubulose runner both sides or homonymy, for transmitting, received ultrasonic signal mutually, the ultrasonic signal passes through measured stream
Body；
Microprocessor, is connected with first ultrasonic transducer, the second ultrasonic transducer, sends ultrasound wave for controlling
Time, frequency, and the first ultrasonic transducer, the sensing signal of the second ultrasonic transducer is received, calculate the first ultrasonic waves
The first ultrasonic signal that energy device sends is transferred to the time T of the second ultrasonic transducer1, and the second ultrasonic transducer sends out
The second ultrasonic signal for sending is transferred to the time T of the first ultrasonic transducer2, and according to T1、T2Calculate the flow velocity of detected fluid
V.
4. ultrasonic flowmeter as claimed in claim 3, it is characterised in that the microprocessor is according to formulaCalculate detected fluid flow velocity, wherein, LcIt is ultrasonic signal from the first ultrasonic transducer center to
The distance that two ultrasonic transducer centers are propagated；L is the ultrasound wave projected length of transfer route on flow path wall in runner.
5. ultrasonic flowmeter as claimed in claim 4, it is characterised in that the microprocessor is always according to formula Q=V × S
Detected fluid flow is calculated, wherein, Q characterizes detected fluid flow, and S is the area of section of tubulose runner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610807075.XA CN106443059A (en) | 2016-09-07 | 2016-09-07 | Fluid velocity measurement method, fluid metering method and flowmeter |
| PCT/CN2017/080918 WO2018045754A1 (en) | 2016-09-07 | 2017-04-18 | Fluid velocity measuring method, fluid metering method and flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610807075.XA CN106443059A (en) | 2016-09-07 | 2016-09-07 | Fluid velocity measurement method, fluid metering method and flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106443059A true CN106443059A (en) | 2017-02-22 |
Family
ID=58164834
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610807075.XA Withdrawn CN106443059A (en) | 2016-09-07 | 2016-09-07 | Fluid velocity measurement method, fluid metering method and flowmeter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106443059A (en) |
| WO (1) | WO2018045754A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018045754A1 (en) * | 2016-09-07 | 2018-03-15 | 成都千嘉科技有限公司 | Fluid velocity measuring method, fluid metering method and flowmeter |
| CN110383076A (en) * | 2017-03-10 | 2019-10-25 | 萨基姆通讯能源及电信联合股份公司 | Method for measuring fluid velocity |
| CN110418969A (en) * | 2017-03-10 | 2019-11-05 | 萨基姆通讯能源及电信联合股份公司 | Method for measuring fluid velocity |
| CN113405619A (en) * | 2021-08-19 | 2021-09-17 | 成都千嘉科技有限公司 | Method and system for realizing automatic detection of meter disassembly behavior by utilizing ultrasonic gas meter |
| CN113884164A (en) * | 2021-12-06 | 2022-01-04 | 成都千嘉科技有限公司 | Self-adaptive calibration method of ultrasonic gas meter |
| CN113899418A (en) * | 2021-12-09 | 2022-01-07 | 西安安森智能仪器股份有限公司 | Method for calculating flow rate of ultrasonic transducer completely not embedded in pipeline |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100298474B1 (en) * | 1998-09-03 | 2002-02-27 | 남상용 | Ultrasonic flow measurement method |
| KR100492308B1 (en) * | 2000-09-15 | 2005-06-02 | 주식회사 하이드로소닉 | Ultrasonic wave flow measuring method |
| JP5857178B2 (en) * | 2011-04-19 | 2016-02-10 | パナソニックＩｐマネジメント株式会社 | Flow measuring device |
| JP2015232519A (en) * | 2014-06-10 | 2015-12-24 | アズビル株式会社 | Clamp-on type ultrasonic flow meter and flow measurement method |
| JP6309405B2 (en) * | 2014-09-05 | 2018-04-11 | アズビル株式会社 | Ultrasonic flow meter and flow rate measurement method |
| CN105091990B (en) * | 2015-09-21 | 2018-07-31 | 南京南瑞集团公司 | A kind of ultrasonic flowmeter water-free detection method |
| CN106443059A (en) * | 2016-09-07 | 2017-02-22 | 成都千嘉科技有限公司 | Fluid velocity measurement method, fluid metering method and flowmeter |
-
2016
- 2016-09-07 CN CN201610807075.XA patent/CN106443059A/en not_active Withdrawn
-
2017
- 2017-04-18 WO PCT/CN2017/080918 patent/WO2018045754A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018045754A1 (en) * | 2016-09-07 | 2018-03-15 | 成都千嘉科技有限公司 | Fluid velocity measuring method, fluid metering method and flowmeter |
| CN110383076A (en) * | 2017-03-10 | 2019-10-25 | 萨基姆通讯能源及电信联合股份公司 | Method for measuring fluid velocity |
| CN110418969A (en) * | 2017-03-10 | 2019-11-05 | 萨基姆通讯能源及电信联合股份公司 | Method for measuring fluid velocity |
| CN113405619A (en) * | 2021-08-19 | 2021-09-17 | 成都千嘉科技有限公司 | Method and system for realizing automatic detection of meter disassembly behavior by utilizing ultrasonic gas meter |
| CN113884164A (en) * | 2021-12-06 | 2022-01-04 | 成都千嘉科技有限公司 | Self-adaptive calibration method of ultrasonic gas meter |
| CN113884164B (en) * | 2021-12-06 | 2022-02-22 | 成都千嘉科技有限公司 | Self-adaptive calibration method of ultrasonic gas meter |
| CN113899418A (en) * | 2021-12-09 | 2022-01-07 | 西安安森智能仪器股份有限公司 | Method for calculating flow rate of ultrasonic transducer completely not embedded in pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018045754A1 (en) | 2018-03-15 |
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Application publication date: 20170222 |