CN107907172A - A kind of ultrasonic flow rate metering monitoring method and system - Google Patents
A kind of ultrasonic flow rate metering monitoring method and system Download PDFInfo
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- CN107907172A CN107907172A CN201711107622.4A CN201711107622A CN107907172A CN 107907172 A CN107907172 A CN 107907172A CN 201711107622 A CN201711107622 A CN 201711107622A CN 107907172 A CN107907172 A CN 107907172A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- General Physics & Mathematics (AREA)
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Abstract
The present invention relates to a kind of ultrasonic flow rate metering monitoring method and system.Method includes：Velocity of sound metering is carried out using time difference method to one group of ultrasonic flow rate gauge table for conveying same source of the gas；When monitoring single sensor fault occur in a pair of sensors of composition metering sound channel in gauge table, the acoustic velocity value of other fault-free gauge tables is transferred, as the velocity of sound c of failure gauge table, control enables following steps and carries out flow measurement to the failure gauge table：Control forms the fault-free sensor emission sound wave in a pair of sensors of metering sound channel and receives the acoustic signals of reflection；Measure the two-way time t of sound wave；The fault-free sensor to the fault sensor distance L, the flow velocity vdFor：The metering of flow is carried out according to flow velocity.The present invention solves the problems, such as in a region that single metering table breaks down and just loses function of measuring, while solves multichannel designing scheme using redundancy backup because of the contradiction between cost the is significantly increased cost and redundancy to be formed.
Description
Technical field
The present invention relates to ultrasonic flow rate to measure technical field, more particularly to a kind of ultrasonic flow rate measures monitoring method with being
System.
Background technology
National appearance policy encourages to use clean energy resource in recent years, and more and more terminal users use substitute gas coal
Charcoal, reduces air pollution, improves environmental quality.But city low pressure natural gas metering mostly using mechanical technology such as family with
Industrial and commercial producer is with epithelium table, waist wheel, turbine flowmeter etc., and such flowmeter (table) is there are mechanical component, during with operation
Between lengthen, mechanical drive department branch because it is dirty, abrasion etc. make Trade Measures produce deviation.But common mechanical technique gauge table and
Flowmeter does not have intelligent diagnostics function, can not judge whether measuring instrument is in normal operating conditions, while can not keep away
Exempt from, alarm and steal the generation of gas phenomenon, cause gas company often larger for reporting the accomplishment of a task or termination of a mission, cause operating loss.
Gas ultrasonic flowmeter possesses intelligent diagnostics function, is obtained in the defeated high pressure line point defeated station of length because of its no-rotary part
To extensive use.Time difference method is used in accordance with related international and national standard, existing air ultrasonic flowmeter, passes through two ultrasounds
Sensor measures the forward and reverse direction sonic transmission time, exports gas flow rate, achievees the purpose that meter gaseous flow.Time difference method
Schematic diagram is shown in attached drawing 1.Time difference method formula is as follows：
And
According to above-mentioned formula, derive that time difference method formula is：
And
Wherein：
tABAcoustic transit time of=the sensors A to sensor B
tBAAcoustic transit times of=sensor the B to sensors A
L=measurement distances
vtThe gas flow rate of=time difference method measurement
The c=velocities of sound
Time difference method requirement：Presence must be matched by forming the sensor of metering sound channel；Sensor can launch sound wave in itself,
The acoustic signals of opposite pairing sensor can be received.
Time difference method formula (1) represents：Gas flow rate, temperature with measured medium related with transmission time and measurement distance
Degree, pressure, component and the velocity of sound etc. are not related, can ensure accurate flow velocity measurement under the field condition of complexity change.This
And time difference method can be widely used in the main reason for speed mode gas flowmeter.
Time difference method can obtain the measurement velocity of sound c propagated in gas at the same time, such as formula (2).According to American Gas association AGA
The sound propagation velocity C of No.10 reality is associated with the live influence factor such as pressure, temperature and media components, if the time difference
Relatively large deviation is produced between velocity of sound c and real velocity of sound C that method detects, such as more than 0.5%, then can be shown that live influence factor
Changed.
It is common for correlation quadraphonic gas ultrasonic flowmeter at present.Using the ultrasonic flowmeter of time difference method, each pair
Associated sensor forms an independent metering sound channel, it is generally the case that to ensure of a relatively high measurement accuracy and redundancy
Backup, Trade Measures with gas ultrasonic flowmeter be mostly two sound channels and more than.
But most of families and industry and commerce user year consumption combustion gas total amount are relatively fewer, and also therefore correspondence is used in low pressure city
The measuring accuracy of city's gas metering table is of less demanding, and instrument purchasing cost control is also more stringent.City gas is measured at present
The ultrasonic flowmeter (table) for the monophonic time difference method that market occurs, cost is although cheap, if forming wherein the one of monophonic
A sensor breaks down, then the sound channel also just loses function of measuring at the same time, can not accomplish to give warning in advance, the intelligence such as redundancy backup
Energy diagnosis and compensation function, cause gas company metering loss, can also produce metering dispute and bad social influence.If
Two sound channels (two pairs of sonacs) using redundancy backup or more sound channel designing scheme, cost will then be significantly increased, combustion gas
Company can reduce the usage quantity of multichannel ultrasonic flowmeter because of cost control.
Therefore the contradiction between existing cost and redundancy, constrains ultrasonic technology in city gas metering field
Extensive use, especially for existing gas meter carry out region collection with control mode, it is necessary to propose that one kind has
The monitoring system and method for solving redundancy backup metering of effect.
The content of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of ultrasonic flow rate metering monitoring method and system, can be to same gas
Each gauge table in source region accurately measures flow using monophonic, solves the prior art because of one in monophonic
The problem of sensor failure just loses function of measuring, while the multichannel designing scheme using redundancy backup is solved because of cost
The contradiction between the cost and redundancy to be formed is significantly increased, ensures that ultrasonic technology is extensive in city gas metering field
Using.
Ultrasonic flow rate provided by the invention measures monitoring method, including：
Velocity of sound metering is carried out using time difference method to one group of ultrasonic flow rate gauge table for conveying same source of the gas；
When monitoring that a certain gauge table is formed in a pair of sensors of metering sound channel in one group of ultrasonic flow rate gauge table
When there is single sensor fault, the acoustic velocity value of other fault-free gauge tables is transferred, as the velocity of sound c of the failure gauge table,
Control enables following steps and carries out flow measurement to the failure gauge table：
Control forms the fault-free sensor emission sound wave in a pair of sensors of metering sound channel, receives this in sensor
Fault sensor reflection acoustic signals；
Measure the two-way time t of the sound wave transmitting and reflection；
The two-way time t is measured as the Dose times of measured medium flow velocity, the fault-free sensor is extremely
The distance L, the flow velocity v of the fault sensordFor：
The metering of flow is carried out according to the flow velocity.
Above-mentioned method, can transfer the acoustic velocity value of other fault-free gauge tables, take the acoustic velocity value of the fault-free gauge table
Velocity of sound c of the average as the failure gauge table.
Above-mentioned method, can transfer the acoustic velocity value of other fault-free gauge tables, take temperature most to be connect with the failure gauge table
Velocity of sound c of the acoustic velocity value of near gauge table as the failure gauge table.
Above-mentioned method, can transfer the acoustic velocity value of other fault-free gauge tables, take temperature most to be connect with the failure gauge table
Velocity of sound c of the average of the acoustic velocity value of a near Sets of Measurement table as the failure gauge table.
Above-mentioned method, monitors one group of ultrasonic flow rate gauge table of the same source of the gas in real time.
Above-mentioned method, the gas pressure in one group of ultrasonic flow rate gauge table of the same source of the gas are identical.
Above-mentioned method, will be stored in processor memory using the velocity of sound of time difference method metering；When forming in monophonic
A sensor failure when, send alarm signal, call in processor memory and measured in the time recently with the failure
The velocity of sound of the close gauge table of table temperature, the velocity of sound c as the failure gauge table.
The present invention also provides a kind of monitoring system that ultrasonic flow rate metering is carried out using the above method, including one group of hypersonic flow
Gauge scale and flow measurement control unit, it is single that one group of ultrasonic flow rate gauge table is connected in parallel to the flow measurement control
Member, the flow measurement control unit be used for monitor and control the gas flow rate of one group of ultrasonic flow rate gauge table, the velocity of sound with
Flow measurement parameter, it is single when occurring in a pair of sensors for monitoring to form metering sound channel in one group of ultrasonic flow rate gauge table
During a sensor fault, the acoustic velocity value of other fault-free gauge tables is transferred, as the velocity of sound c of failure gauge table, controls the event
Hinder gauge table and carry out flow measurement.
Above-mentioned system, the flow measurement control unit include memory, processor and storage on a memory and can
The computer program run on a processor, the processor perform stream of the described program to one group of ultrasonic flow rate gauge table
The metering of speed, the velocity of sound or flow.
Above-mentioned system, the system also includes alarm, when monitoring that gauge table breaks down, the flow measurement
Computer program is run on the processor of control unit makes the alarm send alarm signal；The flow measurement control unit
The processor perform described program when realize following steps：
Velocity of sound metering is carried out using time difference method to one group of ultrasonic flow rate gauge table for conveying same source of the gas；
The temperature of one group of ultrasonic flow rate gauge table to conveying same source of the gas is measured with pressure；
There is single biography when monitoring to form in one group of ultrasonic flow rate gauge table in a pair of sensors for measuring sound channel
During sensor failure, transfer the acoustic velocity value of other fault-free gauge tables, as the velocity of sound c of the failure gauge table, control enable with
Lower step carries out flow measurement to the failure gauge table：
Control forms the fault-free sensor emission sound wave in a pair of sensors of metering sound channel, receives this in sensor
Fault sensor reflection acoustic signals；
Measure the two-way time t of the sound wave transmitting and reflection；
The two-way time t is measured as the Dose times of measured medium flow velocity, the fault-free sensor is extremely
The distance L, the flow velocity v of the fault sensordFor：
The metering of flow is carried out according to the flow velocity.
The ultrasonic flow rate metering monitoring method and system of the present invention, can use each gauge table in same source of the gas region
Monophonic carries out the accurate metering and monitoring of flow, and solves background technology because a sensor in monophonic breaks down
The problem of just losing function of measuring, ensures measuring accuracy, at the same solve multichannel designing scheme using redundancy backup because into
Originally the contradiction between the cost and redundancy to be formed is significantly increased, ensure that ultrasonic technology in city gas metering field
Extensive use.
Brief description of the drawings
Fig. 1 is the flow diagram of background technology correlation flow velocity metering；
Fig. 2 is the flow diagram of monophonic bounce technique flow velocity of the present invention metering；
Fig. 3 measures monitoring system structure diagram for ultrasonic flow rate of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only, rather than limitation of the present invention.
The present invention gas ultrasonic flowmeter (table), can be widely used in the metered conditions such as Gas Components, pipeline pressure compared with
For stabilization, there is the city gas metering field of fixed stop the supple of gas or steam cycle and the requirement of relatively low measuring accuracy etc..
The ultrasonic flow rate metering monitoring method and system of the present invention, can carry out each gauge table in same source of the gas region
Monitoring, and the metering of flow can be carried out only with monophonic sonac.Method mainly includes the following steps that：
Velocity of sound metering is carried out using time difference method to one group of ultrasonic flow rate gauge table for conveying same source of the gas；
There is single biography when monitoring to form in one group of ultrasonic flow rate gauge table in a pair of sensors for measuring sound channel
During sensor failure, transfer the acoustic velocity value of other fault-free gauge tables, as the velocity of sound c of the failure gauge table, control enable with
Lower step carries out flow measurement to the failure gauge table：
Control forms the fault-free sensor emission sound wave in a pair of sensors of metering sound channel, receives this in sensor
Fault sensor reflection acoustic signals；
Measure the two-way time t of the sound wave transmitting and reflection；
The two-way time t is measured as the Dose times of measured medium flow velocity, the fault-free sensor is extremely
The distance L, the flow velocity v of the fault sensordFor：
The metering of flow is carried out according to the flow velocity.
The method of above-mentioned flow measurement can be described as time drift method.
Above-mentioned time drift method is referred to herein as bounce technique.The time difference method of the corresponding prior art, also known as
For to the method for penetrating.The schematic diagram of time drift method is shown in attached drawing 2.
Time drift method derives from daily phenomenon.Example：Row the boat in hydrostatic, A points are to B point air line distance L, such as with constant speed c
Row the boat, from A points to B points, required time is t1, from B points to A points, required time is t2, round-trip required total time is t, then:
And
Obviously, t1Equal to t2, and
The constant flow rate current flowed to if there is A to B, when flow velocity v is not zero, then：
And
Obviously, t1Not equal to t2, the drift of time generation, and
The time drift method formula derived is：
Apply in gas ultrasonic flowmeter, in the formula (3) of time drift method：
The reflection sound wave round-trip transmission time of t=sensors As measurement
L=measurement distances
vdThe gas flow rate of=time drift method measurement
The c=velocities of sound
The requirement of time drift method：The a pair of sensors for forming metering sound channel has one can work normally；Sensor is sent out
Sound wave is penetrated, receives the acoustic signals of opposite sensor reflection.
Time drift method formula (3) represents：Gas flow rate has outside the Pass with transmission time and measurement distance, and also and real velocity of sound
C has much relations.In the present invention time drift method use the velocity of sound be according in same source of the gas region work normally gauge table by
The velocity of sound c derived according to time difference method, such as formula (2).
How according in same source of the gas region work normally gauge table derive velocity of sound c according to time difference method, will determine therefore
Hinder the accuracy of measuring of gauge table.Because this monitoring system can carry out in real time one group of ultrasonic flow rate gauge table of the same source of the gas
Monitoring, thus eliminated as far as possible caused by time difference such as daytime and the night temperature difference are larger existing for gauge table using real-time
Measurement error.
During monitoring, it will be stored in using the velocity of sound of each gauge table of time difference method metering in processor memory.Work as region
When interior gauge table forms a sensor failure in monophonic, when only a sonac works normally, it can send out
Go out alarm signal, gas flow rate is converted into the sensor of the normal work air flow velocity that temporally drift method is measured.Can
The velocity of sound in the time recently with the close gauge table of the failure gauge table temperature in monitoring system processor memory is called, as
The velocity of sound c of the failure gauge table.The nearest time can be set according to actual conditions, as 2 it is small when within.
When taking the velocity of sound of the gauge table close with the failure gauge table temperature, if in the same area gauge table the temperature difference
It is not very big, according to setting error amount requirement, can use the average of acoustic velocity value of all fault-free gauge tables as the failure
The velocity of sound c of gauge table.
Certainly required according to error precision, also can use temperature and the sound of the immediate gauge table of the failure gauge table
Velocity of sound c of the speed value as the failure gauge table.
Similarly, temperature is also can use with the average of the acoustic velocity value of the immediate Sets of Measurement table of the failure gauge table as institute
State the velocity of sound c of failure gauge table.
Because the measuring accuracy of flow is related to temperature, air pressure, component, what it is in the Sets of Measurement table conveying to monitoring is same
On the premise of source of the gas, the pressure of one group of ultrasonic flow rate metering of the same source of the gas is essentially identical.So only have temperature parameter to be
Influence the influence factor of flow measurement, thus it is above-mentioned transfer acoustic velocity value when eliminate the influence of temperature as far as possible.In pressure and group
For split-phase with the case of, monitoring method of the invention may be such that the temperature range between gauge table is controlled below 0.1 degree Celsius, and
0.1 degree Celsius of change causes the measurement error of flow velocity to be less than 0.02%, this has not only ensured that single sensing occurs in flow meter
Device failure remains to normally measure, and drastically increases the accuracy of gauge table.
In order to realize above-mentioned monitoring method, the present invention also provides a kind of prison that ultrasonic flow rate metering is carried out using the above method
Control system, as shown in figure 3, including one group of ultrasonic flow rate gauge table 1 and flow measurement control unit 2, multiple ultrasonic flow rate meterings
Table 1 forms one group and is connected in parallel to flow measurement control unit 2, and the flow measurement control unit 2 is used to monitor and control
Flow velocity, the velocity of sound and the flow measurement of one group of ultrasonic flow rate gauge table 1.The system monitors described one group it is crucial that working as
When there is single sensor fault in a pair of sensors of composition metering sound channel in ultrasonic flow rate gauge table, its in memory is transferred
The acoustic velocity value of his fault-free gauge table, as the velocity of sound c of failure gauge table, controls the failure gauge table to carry out flow measurement.
So eliminate because the redundancy that failure to be prevented produces and multichannel sensor is carried out on a gauge table is set.
Specifically, the flow measurement control unit 2 includes memory, processor and storage on a memory and can locate
The computer program that runs on reason device, the processor perform described program to the flow velocity of one group of ultrasonic flow rate gauge table,
The metering of the velocity of sound or flow.In order to which the temperature to this group of ultrasonic flow rate gauge table and pressure and other parameters carry out lateral comparison, processing
Device performs described program and the temperature for conveying one group of ultrasonic flow rate gauge table of same source of the gas is also measured with pressure.
The specific step that performs is as shown in the above method.
Because of demand of alarming, the system may also include alarm, when monitoring that gauge table 1 breaks down, the flow
Computer program is run on the processor of measurement control unit 2 makes the alarm send alarm signal.
The monitoring system and method for the present invention, there is provided it is a kind of for ease of maintenaince safeguard, convenient management and redundancy guarantee it is low
Cost gas ultrasonic flow rate measuring solution, meets the professional standard and client's low cost of city gas measuring instrument
Demand.
The ultrasonic flow rate metering monitoring method and system of the present invention, can use each gauge table in same source of the gas region
Monophonic carries out the accurate metering and monitoring of flow, and solves background technology because a sensor in monophonic breaks down
The problem of just losing function of measuring, ensures measuring accuracy, at the same solve multichannel designing scheme using redundancy backup because into
Originally the contradiction between the cost and redundancy to be formed is significantly increased, ensure that ultrasonic technology in city gas metering field
Extensive use.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of ultrasonic flow rate measures monitoring method, it is characterised in that including：
Velocity of sound metering is carried out using time difference method to one group of ultrasonic flow rate gauge table for conveying same source of the gas；
When monitoring in one group of ultrasonic flow rate gauge table that a certain gauge table forms in a pair of sensors of metering sound channel and occur
During single sensor fault, the acoustic velocity value of other fault-free gauge tables is transferred, as the velocity of sound c of the failure gauge table, control
Enable following steps and flow measurement is carried out to the failure gauge table：
Control forms the fault-free sensor emission sound wave in a pair of sensors of metering sound channel, receives this to the event in sensor
Hinder the acoustic signals of sensor reflection；
Measure the two-way time t of the sound wave transmitting and reflection；
The two-way time t is measured as the Dose times of measured medium flow velocity, the fault-free sensor is to described
The distance L, the flow velocity v of fault sensordFor：
The metering of flow is carried out according to the flow velocity.
2. according to the method described in claim 1, it is characterized in that, transfer the acoustic velocity value of other fault-free gauge tables, take described
Velocity of sound c of the average of the acoustic velocity value of fault-free gauge table as the failure gauge table.
3. according to the method described in claim 1, it is characterized in that, transfer the acoustic velocity value of other fault-free gauge tables, temperature is taken
With the velocity of sound c of the acoustic velocity value of the immediate gauge table of failure gauge table as the failure gauge table.
4. according to the method described in claim 1, it is characterized in that, transfer the acoustic velocity value of other fault-free gauge tables, temperature is taken
With the velocity of sound c of the average of the acoustic velocity value of the immediate Sets of Measurement table of the failure gauge table as the failure gauge table.
5. according to the method described in claim 1, it is characterized in that, to one group of ultrasonic flow rate gauge table of the same source of the gas into
Row real time monitoring.
6. according to the method described in claim 1, it is characterized in that, in one group of ultrasonic flow rate gauge table of the same source of the gas
Gas pressure is identical.
7. according to the method described in claim 1, it is characterized in that, processor will be stored in using the velocity of sound of time difference method metering
In memory；When forming a sensor failure in monophonic, alarm signal is sent, is called in processor memory recently
With the velocity of sound of the close gauge table of the failure gauge table temperature in time, the velocity of sound c as the failure gauge table.
8. a kind of monitoring system that ultrasonic flow rate metering is carried out using any one of claim 1 to 7 the method, including one group surpasses
Sonic flowmeter scale and flow measurement control unit, one group of ultrasonic flow rate gauge table are connected in parallel to the flow measurement control
Unit processed, it is characterised in that the flow measurement control unit is used to monitor and control one group of ultrasonic flow rate gauge table
Gas flow rate, the velocity of sound and flow measurement parameter, the one of sound channel is measured when monitoring to form in one group of ultrasonic flow rate gauge table
During to single sensor fault occur in sensor, the acoustic velocity value of other fault-free gauge tables is transferred, as failure gauge table
Velocity of sound c, controls the failure gauge table to carry out flow measurement.
9. system according to claim 8, it is characterised in that the flow measurement control unit includes memory, processing
On a memory and the computer program that can run on a processor, the processor execution described program is to described for device and storage
The metering of the flow velocity of one group of ultrasonic flow rate gauge table, the velocity of sound or flow.
10. system according to claim 9, it is characterised in that the system also includes alarm, when monitoring gauge table
Running computer program during failure, on the processor of the flow measurement control unit makes the alarm send alarm signal
Number；The processor of the flow measurement control unit realizes following steps when performing described program：
Velocity of sound metering is carried out using time difference method to one group of ultrasonic flow rate gauge table for conveying same source of the gas；
The temperature of one group of ultrasonic flow rate gauge table to conveying same source of the gas is measured with pressure；
There is single sensor when monitoring to form in one group of ultrasonic flow rate gauge table in a pair of sensors for measuring sound channel
During failure, the acoustic velocity value of other fault-free gauge tables is transferred, as the velocity of sound c of the failure gauge table, control enables following step
Suddenly flow measurement is carried out to the failure gauge table：
Control forms the fault-free sensor emission sound wave in a pair of sensors of metering sound channel, receives this to the event in sensor
Hinder the acoustic signals of sensor reflection；
Measure the two-way time t of the sound wave transmitting and reflection；
The two-way time t is measured as the Dose times of measured medium flow velocity, the fault-free sensor is to described
The distance L, the flow velocity v of fault sensordFor：
The metering of flow is carried out according to the flow velocity.
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| CN201711107622.4A CN107907172A (en) | 2017-11-10 | 2017-11-10 | A kind of ultrasonic flow rate metering monitoring method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632029A (en) * | 2018-12-20 | 2019-04-16 | 广州燃气集团有限公司 | The method for choosing the accurate measurement magnitude of pipeline flow compensation pressure point |
| CN111323100A (en) * | 2020-03-24 | 2020-06-23 | 成都千嘉科技有限公司 | Ultrasonic gas meter fault diagnosis system and method |
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| CN102207398A (en) * | 2011-04-07 | 2011-10-05 | 托肯恒山科技（广州）有限公司 | Ultrasonic flow measurement device and method for fuel terminal settlement |
| CN103808379A (en) * | 2012-11-14 | 2014-05-21 | 丹尼尔测量和控制公司 | System and method for ultrasonic metering using an orifice meter fitting |
| CN106643987A (en) * | 2016-11-10 | 2017-05-10 | 浙江大学 | Fault diagnosis and compensation method for multi-channel ultrasonic gas flow meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000314742A (en) * | 1999-04-30 | 2000-11-14 | Toho Keisoku Kenkyusho:Kk | Flow velocity measuring method |
| CN102207398A (en) * | 2011-04-07 | 2011-10-05 | 托肯恒山科技（广州）有限公司 | Ultrasonic flow measurement device and method for fuel terminal settlement |
| CN103808379A (en) * | 2012-11-14 | 2014-05-21 | 丹尼尔测量和控制公司 | System and method for ultrasonic metering using an orifice meter fitting |
| CN106643987A (en) * | 2016-11-10 | 2017-05-10 | 浙江大学 | Fault diagnosis and compensation method for multi-channel ultrasonic gas flow meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632029A (en) * | 2018-12-20 | 2019-04-16 | 广州燃气集团有限公司 | The method for choosing the accurate measurement magnitude of pipeline flow compensation pressure point |
| CN111323100A (en) * | 2020-03-24 | 2020-06-23 | 成都千嘉科技有限公司 | Ultrasonic gas meter fault diagnosis system and method |
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Application publication date: 20180413 |