CA2535163A1 - A method and apparatus for correcting output information of flow measurement apparatus - Google Patents
A method and apparatus for correcting output information of flow measurement apparatus Download PDFInfo
- Publication number
- CA2535163A1 CA2535163A1 CA002535163A CA2535163A CA2535163A1 CA 2535163 A1 CA2535163 A1 CA 2535163A1 CA 002535163 A CA002535163 A CA 002535163A CA 2535163 A CA2535163 A CA 2535163A CA 2535163 A1 CA2535163 A1 CA 2535163A1
- Authority
- CA
- Canada
- Prior art keywords
- flow
- measurement apparatus
- flow measurement
- data points
- expression
- Prior art date
- 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.)
- Granted
Links
- 238000005259 measurement Methods 0.000 title claims abstract 34
- 238000000034 method Methods 0.000 title claims abstract 5
- 230000014509 gene expression Effects 0.000 claims 23
- 238000005070 sampling Methods 0.000 claims 9
- 230000000903 blocking effect Effects 0.000 abstract 1
Classifications
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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
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
- G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
- G01F1/8472—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
- G01F1/8477—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane with multiple measuring conduits
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
- G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
- G01F1/8436—Coriolis or gyroscopic mass flowmeters constructional details signal processing
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
Abstract
A method and apparatus of correcting flow information generated by flow measurement apparatus, such as a Coriolis flowmeter. The disclosed method and apparatus corrects flow information generated during low flow and zero flow rates by blocking the application of spurious flow signals from the output of the flowmeter.
Claims (14)
1. Meter electronics (120) for a flow measurement apparatus having a processing system for correcting flow information generated by said flow measurement apparatus; said meter electronics (120) comprising:
instructions for directing said processing system to:
sample a signal representing flow information generated by said flow measurement apparatus during a zero flow state of said flow measurement apparatus to define a plurality of data points representing said signal;
establish deviation limits for at least one of said data points;
determine whether each sampled data point is within said deviation limits;
sample a data point within said deviation limits to define spurious flow information for said zero flow state;
sample a data point outside of said deviation limits to define information representing a true material flow of said flow measurement apparatus;
continue said sampling of said data points as long as said sampled data points are within said deviation limits;
prevent said spurious flow information from being applied as to an output of said flow measurement apparatus during the sampling of data points within deviation limits;
determine that the most recently sampled data point is outside of said deviation limits and thereby represents information for a true material flow of said flow measurement apparatus; and generate an output signal representing said true material flow information represented by said most recently sampled data point.
instructions for directing said processing system to:
sample a signal representing flow information generated by said flow measurement apparatus during a zero flow state of said flow measurement apparatus to define a plurality of data points representing said signal;
establish deviation limits for at least one of said data points;
determine whether each sampled data point is within said deviation limits;
sample a data point within said deviation limits to define spurious flow information for said zero flow state;
sample a data point outside of said deviation limits to define information representing a true material flow of said flow measurement apparatus;
continue said sampling of said data points as long as said sampled data points are within said deviation limits;
prevent said spurious flow information from being applied as to an output of said flow measurement apparatus during the sampling of data points within deviation limits;
determine that the most recently sampled data point is outside of said deviation limits and thereby represents information for a true material flow of said flow measurement apparatus; and generate an output signal representing said true material flow information represented by said most recently sampled data point.
2. The meter electronics (120) of claim 1 characterized in that said flow measurement apparatus defines a Coriolis flowmeter.
3. The meter electronics (120) of claims 1 or 2 characterized in that said processing system is configured to execute the further instructions of:
specify a low flow cutoff limit representing a material flow below which said flow measurement apparatus will not generate an output signal representing a true material flow;
monitor the material flow information represented by said output signal;
determine that said monitored material flow information becomes less than the material flow represented by said low flow cutoff limit;
terminate the generation of said output signal; and resume the sampling of the said data points for said zero flow state of said flow measurement apparatus.
specify a low flow cutoff limit representing a material flow below which said flow measurement apparatus will not generate an output signal representing a true material flow;
monitor the material flow information represented by said output signal;
determine that said monitored material flow information becomes less than the material flow represented by said low flow cutoff limit;
terminate the generation of said output signal; and resume the sampling of the said data points for said zero flow state of said flow measurement apparatus.
4. The meter electronics (120) of claim 3 characterized in that said processing system is configured to execute the further instructions of:
determine that a newly sampled data point represents a material flow that is outside of said deviation limits; and generate an output signal for the true material flow represented by said newly sampled data point.
determine that a newly sampled data point represents a material flow that is outside of said deviation limits; and generate an output signal for the true material flow represented by said newly sampled data point.
5. The meter electronics (120) of claim 1 characterized in that said processing system is configured to execute the further instructions of:
establish said deviation limits by the step of establishing an upper limit and a lower limit of deviation associated with each sampled data point;
sample said data points as long as the spurious material flow information represented by said data point is between said upper deviation limit and said lower deviation limit;
determine that a newly sampled data point falls outside of said limits;
determine the true material flow information represented by said sampled data point; and generate an output signal representing said determined flow information.
establish said deviation limits by the step of establishing an upper limit and a lower limit of deviation associated with each sampled data point;
sample said data points as long as the spurious material flow information represented by said data point is between said upper deviation limit and said lower deviation limit;
determine that a newly sampled data point falls outside of said limits;
determine the true material flow information represented by said sampled data point; and generate an output signal representing said determined flow information.
6. The meter electronics (120) of claims 1-5 characterized in that said processing system is configured to execute the further instructions of:
determine the average µ of the flow rates of the N previously sampled data points;
establish said standard deviation limits of the previous N data points by multiplying the product of the standard deviation r by a user specified number standard deviations A away from said average of the deviations; and add and subtract the product of rA with respect to µ.
determine the average µ of the flow rates of the N previously sampled data points;
establish said standard deviation limits of the previous N data points by multiplying the product of the standard deviation r by a user specified number standard deviations A away from said average of the deviations; and add and subtract the product of rA with respect to µ.
7. The meter electronics (120) of claim 1 or 2 characterized in that said processing system is configured to execute the further instructions of:
derive an expression to define data points characterizing the parameters of time delay .DELTA.t and input power of said flow measurement apparatus during a low flow state of said flow measurement apparatus;
derive an expression to define data points characterizing the parameters of .DELTA.t and input power of said flow measurement apparatus during a zero flow state of said flow measurement apparatus; and subtract said defined expression for said zero flow state from said expression for said low flow state to obtain an output signal for said flow measurement apparatus that is devoid of the spurious errors induced in said apparatus during said zero flow state.
derive an expression to define data points characterizing the parameters of time delay .DELTA.t and input power of said flow measurement apparatus during a low flow state of said flow measurement apparatus;
derive an expression to define data points characterizing the parameters of .DELTA.t and input power of said flow measurement apparatus during a zero flow state of said flow measurement apparatus; and subtract said defined expression for said zero flow state from said expression for said low flow state to obtain an output signal for said flow measurement apparatus that is devoid of the spurious errors induced in said apparatus during said zero flow state.
8. The meter electronics (120) of claim 3 characterized in that said processing system is configured to execute the further instructions of:
use a relationship between time delay .DELTA.t and input power of said flow measurement apparatus to derive an expression representing a plurality of said data points characterizing the generation of flow information by said flow measurement apparatus during said zero flow state.
use a relationship between time delay .DELTA.t and input power of said flow measurement apparatus to derive an expression representing a plurality of said data points characterizing the generation of flow information by said flow measurement apparatus during said zero flow state.
9. The meter electronics (120) of claim 8 characterized in that said processing system is configured to execute the further instructions of:
determine the deviation between subsequently sampled data points and said expression; and use said deviation determination to detect the end of said zero flow state.
determine the deviation between subsequently sampled data points and said expression; and use said deviation determination to detect the end of said zero flow state.
10. The meter electronics (120) of claim 8 characterized in that said processing system is configured to execute the further instructions of:
derive said expression by sampling said data points; and use "n" of said data points in a curve fitting operation to derive said expression.
derive said expression by sampling said data points; and use "n" of said data points in a curve fitting operation to derive said expression.
11. The meter electronics (120) of claim 10 characterized in that said processing system is configured to execute the further instructions of:
sample the remainder "m" of said sampled data points;
determine the deviation between each of said "m" sampled data points and said expression; and use said deviation determination to determine the operational state of said flow measurement apparatus.
sample the remainder "m" of said sampled data points;
determine the deviation between each of said "m" sampled data points and said expression; and use said deviation determination to determine the operational state of said flow measurement apparatus.
12. The meter electronics (120) of claim 9 characterized in that said processing system is configured to execute the further instructions of:
derive a plurality of said expressions for said zero flow state;
store said plurality of derived expressions in a memory;
define consistency information;
compare a newly derived expression with said stored expressions;
determine whether said newly derived expression is consistent with said stored expressions;
use said newly defined expression if it is determined to be consistent with said stored expressions; and preclude the use of said newly defined expression if it is determined to be inconsistent with said stored expressions.
derive a plurality of said expressions for said zero flow state;
store said plurality of derived expressions in a memory;
define consistency information;
compare a newly derived expression with said stored expressions;
determine whether said newly derived expression is consistent with said stored expressions;
use said newly defined expression if it is determined to be consistent with said stored expressions; and preclude the use of said newly defined expression if it is determined to be inconsistent with said stored expressions.
13. Meter electronics (120) for a flow measurement apparatus having a processing system for correcting flow information generated by said flow measurement apparatus; said meter electronics (120) comprising:
instructions for directing said processing system to:
derive an expression to define data points for a signal characterizing the parameters of time delay .DELTA.t and input power of said flow measurement apparatus during a zero flow state of said flow measurement apparatus;
derive an expression to define data points characterizing the parameters of time delay .DELTA.t and input power of said flow measurement apparatus during a low flow state of said flow measurement apparatus;
subtract said expression for a zero flow state of said flow measurement apparatus from said expression for said low flow state to obtain an output signal devoid of the errors induced during said zero flow state.
instructions for directing said processing system to:
derive an expression to define data points for a signal characterizing the parameters of time delay .DELTA.t and input power of said flow measurement apparatus during a zero flow state of said flow measurement apparatus;
derive an expression to define data points characterizing the parameters of time delay .DELTA.t and input power of said flow measurement apparatus during a low flow state of said flow measurement apparatus;
subtract said expression for a zero flow state of said flow measurement apparatus from said expression for said low flow state to obtain an output signal devoid of the errors induced during said zero flow state.
14. A method of operating a flow measurement apparatus for correcting flow information generated by said flow measurement apparatus, said method comprising the steps of:
sampling a signal representing flow information generated by said flow measurement apparatus during a zero flow state of said flow measurement apparatus to define a plurality of data points representing said signal;
establishing deviation limits for at least some of said data points;
determining whether each sampled data point is within said deviation limits;
sampling a data point within said deviation limits to define spurious flow information for said zero flow state;
sampling a data point outside of said deviation limits to define information representing a true material flow of said flow measurement apparatus;
continuing said sampling of said data points as long as said sampled data points are within said deviation limits;
preventing said spurious flow information from being applied as to an output of said flow measurement apparatus during the sampling of data points within deviation limits;
determining that the most recently sampled data point is outside of said deviation limits and thereby represents information for a true material flow of said flow measurement apparatus; and generating an output signal representing said true material flow information represented by said most recently sampled data point.
sampling a signal representing flow information generated by said flow measurement apparatus during a zero flow state of said flow measurement apparatus to define a plurality of data points representing said signal;
establishing deviation limits for at least some of said data points;
determining whether each sampled data point is within said deviation limits;
sampling a data point within said deviation limits to define spurious flow information for said zero flow state;
sampling a data point outside of said deviation limits to define information representing a true material flow of said flow measurement apparatus;
continuing said sampling of said data points as long as said sampled data points are within said deviation limits;
preventing said spurious flow information from being applied as to an output of said flow measurement apparatus during the sampling of data points within deviation limits;
determining that the most recently sampled data point is outside of said deviation limits and thereby represents information for a true material flow of said flow measurement apparatus; and generating an output signal representing said true material flow information represented by said most recently sampled data point.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2003/027126 WO2005031285A1 (en) | 2003-08-29 | 2003-08-29 | A method and apparatus for correcting output information of flow measurement apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2535163A1 true CA2535163A1 (en) | 2005-04-07 |
| CA2535163C CA2535163C (en) | 2012-11-27 |
Family
ID=34392791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2535163A Expired - Lifetime CA2535163C (en) | 2003-08-29 | 2003-08-29 | A method and apparatus for correcting output information of flow measurement apparatus |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US7194368B2 (en) |
| EP (1) | EP1658478B1 (en) |
| JP (1) | JP4994665B2 (en) |
| KR (2) | KR101153465B1 (en) |
| CN (1) | CN100419394C (en) |
| AR (1) | AR045269A1 (en) |
| AU (1) | AU2003268276A1 (en) |
| BR (1) | BRPI0318478B1 (en) |
| CA (1) | CA2535163C (en) |
| HK (1) | HK1092866A1 (en) |
| MX (1) | MXPA06002093A (en) |
| WO (1) | WO2005031285A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595420A (en) * | 2012-05-11 | 2020-08-28 | 布里斯托尔D/B/A远程自动化解决方案公司 | System and method for starting verification test in flowmeter through flow computer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7302356B2 (en) | 2004-09-15 | 2007-11-27 | Endress + Hauser Flowtec Ag | Coriolis flowmeter |
| DE102006044592A1 (en) | 2006-09-19 | 2008-03-27 | Endress + Hauser Flowtec Ag | Method for determining the mass flow rate of a Coriolis mass flowmeter arranged on a rotary filler |
| JP5163852B2 (en) * | 2007-03-13 | 2013-03-13 | 横河電機株式会社 | Electromagnetic flowmeter and its zero point measuring method |
| WO2009048457A1 (en) * | 2007-10-08 | 2009-04-16 | Micro Motion, Inc. | A flow device and method for operating a flow device |
| DE102008016235A1 (en) * | 2008-03-27 | 2009-10-01 | Endress + Hauser Flowtec Ag | A method of operating a meter disposed on a rotary carousel filling machine |
| DE102008050116A1 (en) | 2008-10-06 | 2010-04-08 | Endress + Hauser Flowtec Ag | In-line measuring device |
| DE102008050115A1 (en) | 2008-10-06 | 2010-04-08 | Endress + Hauser Flowtec Ag | In-line measuring device |
| DE102008050113A1 (en) | 2008-10-06 | 2010-04-08 | Endress + Hauser Flowtec Ag | In-line measuring device |
| JP4436884B1 (en) * | 2009-02-06 | 2010-03-24 | 株式会社オーバル | Signal processing method, signal processing apparatus, and Coriolis flow meter |
| JP5740080B2 (en) * | 2009-06-18 | 2015-06-24 | 横河電機株式会社 | Coriolis flow meter |
| JP5101581B2 (en) * | 2009-08-25 | 2012-12-19 | 株式会社堀場エステック | Flow control device |
| KR101744477B1 (en) * | 2011-06-27 | 2017-06-08 | 마이크로 모우션, 인코포레이티드 | Vibratory flow meter and zero check method |
| DE102013205003A1 (en) * | 2012-03-22 | 2013-09-26 | First Sensor AG | Calibration of flowmeters |
| CN103383278B (en) * | 2012-05-04 | 2016-03-02 | 艾默生过程控制流量技术有限公司 | Flowmeter and control method thereof |
| CN103674144A (en) * | 2013-12-12 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Coriolis mass flowmeter sensor and measuring tube device thereof |
| CN104047328B (en) * | 2014-06-24 | 2017-01-18 | 上海华兴数字科技有限公司 | Excavator positive flow control method |
| CN107076603B (en) * | 2014-10-21 | 2019-09-10 | 高准公司 | For applying the device and correlation technique of variable zero algorithm in vibrating flow meter |
| DE102015107366B3 (en) * | 2015-05-11 | 2016-01-21 | Krohne Messtechnik Gmbh | Method of operating a flowmeter and related flowmeter |
| KR102248131B1 (en) * | 2016-10-04 | 2021-05-04 | 마이크로 모우션, 인코포레이티드 | Flowmeter calibration method and related devices |
| CN106769655A (en) * | 2016-12-29 | 2017-05-31 | 青岛澳威流体计量有限公司 | For the online averag density metering device of fuel transfer system |
| EP3563123A1 (en) | 2016-12-29 | 2019-11-06 | Endress+Hauser Flowtec AG | Vibronic measuring system for measuring a mass flow rate |
| CN110114641B (en) | 2016-12-29 | 2021-08-03 | 恩德斯+豪斯流量技术股份有限公司 | Electronic vibration measurement system for measuring mass flow rate |
| DE102017106211A1 (en) | 2016-12-29 | 2018-07-05 | Endress+Hauser Flowtec Ag | Vibronic measuring system for measuring a mass flow rate |
| CN106895896A (en) * | 2017-03-03 | 2017-06-27 | 太原太航科技有限公司 | The e measurement technology of mass flowmenter self-correcting zero |
| CN110431387B (en) * | 2017-03-20 | 2021-11-09 | 高准公司 | Determining zero point offset of a vibrating meter under process conditions |
| US20200182675A1 (en) * | 2017-08-08 | 2020-06-11 | Micro Motion, Inc. | Flowmeter false totalizing elimination devices and methods |
| CN107766972B (en) * | 2017-09-30 | 2021-04-27 | 新智能源系统控制有限责任公司 | Method and device for acquiring energy flow delay time |
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-
2003
- 2003-08-29 KR KR1020067004033A patent/KR101153465B1/en active IP Right Grant
- 2003-08-29 CA CA2535163A patent/CA2535163C/en not_active Expired - Lifetime
- 2003-08-29 US US10/566,613 patent/US7194368B2/en not_active Expired - Lifetime
- 2003-08-29 KR KR1020117004661A patent/KR20110025240A/en not_active Application Discontinuation
- 2003-08-29 CN CNB038269961A patent/CN100419394C/en not_active Expired - Lifetime
- 2003-08-29 JP JP2005509239A patent/JP4994665B2/en not_active Expired - Fee Related
- 2003-08-29 AU AU2003268276A patent/AU2003268276A1/en not_active Abandoned
- 2003-08-29 EP EP03749230.3A patent/EP1658478B1/en not_active Expired - Lifetime
- 2003-08-29 MX MXPA06002093A patent/MXPA06002093A/en active IP Right Grant
- 2003-08-29 BR BRPI0318478A patent/BRPI0318478B1/en active IP Right Grant
- 2003-08-29 WO PCT/US2003/027126 patent/WO2005031285A1/en active Application Filing
-
2004
- 2004-08-17 AR ARP040102944A patent/AR045269A1/en unknown
-
2006
- 2006-12-06 HK HK06113421.6A patent/HK1092866A1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595420A (en) * | 2012-05-11 | 2020-08-28 | 布里斯托尔D/B/A远程自动化解决方案公司 | System and method for starting verification test in flowmeter through flow computer |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060070554A (en) | 2006-06-23 |
| BRPI0318478B1 (en) | 2016-10-11 |
| MXPA06002093A (en) | 2006-05-25 |
| KR20110025240A (en) | 2011-03-09 |
| CN1820187A (en) | 2006-08-16 |
| CN100419394C (en) | 2008-09-17 |
| BR0318478A (en) | 2006-09-12 |
| JP2007521465A (en) | 2007-08-02 |
| AR045269A1 (en) | 2005-10-19 |
| EP1658478B1 (en) | 2019-08-14 |
| JP4994665B2 (en) | 2012-08-08 |
| US7194368B2 (en) | 2007-03-20 |
| HK1092866A1 (en) | 2007-02-16 |
| CA2535163C (en) | 2012-11-27 |
| WO2005031285A1 (en) | 2005-04-07 |
| US20060195282A1 (en) | 2006-08-31 |
| AU2003268276A1 (en) | 2005-04-14 |
| EP1658478A1 (en) | 2006-05-24 |
| KR101153465B1 (en) | 2012-06-05 |
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