WO2007068242A1 - Method for volumetric measuring of gas and diaphragm gas meter - Google Patents

Method for volumetric measuring of gas and diaphragm gas meter Download PDF

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Publication number
WO2007068242A1
WO2007068242A1 PCT/DK2005/000797 DK2005000797W WO2007068242A1 WO 2007068242 A1 WO2007068242 A1 WO 2007068242A1 DK 2005000797 W DK2005000797 W DK 2005000797W WO 2007068242 A1 WO2007068242 A1 WO 2007068242A1
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WO
WIPO (PCT)
Prior art keywords
gas
gray
temperature
code disc
electronic
Prior art date
Application number
PCT/DK2005/000797
Other languages
French (fr)
Inventor
Jan Knudsen
Tonny W. Frederiksen
Lars Bo Fagerlind
Original Assignee
Flonidan Dc A/S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Flonidan Dc A/S filed Critical Flonidan Dc A/S
Priority to PCT/DK2005/000797 priority Critical patent/WO2007068242A1/en
Publication of WO2007068242A1 publication Critical patent/WO2007068242A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature
    • G01F15/04—Compensating or correcting for variations in pressure, density or temperature of gases to be measured
    • G01F15/043—Compensating or correcting for variations in pressure, density or temperature of gases to be measured using electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/061—Indicating or recording devices for remote indication
    • G01F15/063—Indicating or recording devices for remote indication using electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
    • G01F3/20—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having flexible movable walls, e.g. diaphragms, bellows

Definitions

  • the present invention concerns a method for volumetric measuring of gas and of the kind indicated in the preamble of claim 1.
  • the invention also concerns a diaphragm gas meter of the kind indicated in the preamble of claim 4 which uses the method according the invention.
  • diaphragm gas meters are widely used, e.g. mechanical diaphragm gas meters which are known to have a stable measuring principle, a large dynamic range and a low production cost.
  • mechanical diaphragm gas meters which are known to have a stable measuring principle, a large dynamic range and a low production cost.
  • WO 2004/079301 A2 disclose optical detecting devices for gas meters, comprising a consumption indicator in the form of a rotating disc which is designed with at least one active sector as well as optical elements of the emitter type and receiver type disposed opposite to the disc.
  • the received optical signal is used for indicating the number of revolutions of the disc.
  • This comprises, cf. document '301, at least three active sectors with a central angle of 120°, as each sector has a surface coating with different colours; according to document '302, the disc has an opaque active sector with a central angle of 45-225°, and according to document '648, the disc has an active reflecting sector with a central angle of 45-225°.
  • the invention has the object of indicating an improved method for volumetric measurement of gas and of the kind specified in the introduction, and which by means of simple method steps enables achieving a more precise and just settlement of gas consumption.
  • the invention also has the purpose of indicating an improved diaphragm gas meter of the kind mentioned in the introduction, and which by means of simple technical means under the application of the method according to the invention enables providing a more precise and robust gas meter which furthermore supports a more just settlement of gas consumption, and which may ensure correct data by remote reading.
  • the method according to the invention is characterised in that a Gray-code disc is used as rotation indicator mounted on the external measuring wheel, that opto-electronic means are used for detecting the rotation of the Gray-code disc, that a number of temperature measurements are performed on and spaced apart from the measuring vessel, and that the temperature of the gas at an outlet branch of the measuring vessel or in it is determined by extrapolation based on the temperature measurements.
  • the method according to the invention may suitably be performed in such a way that the detecting of the rotation of the Gray-code disc is performed by the opto-electronic means in the form of light and photo diodes interacting in pairs.
  • the invention also concerns a diaphragm gas meter of the kind specified in the introduction, which diaphragm gas meter is characterised in that the external measuring wheel is provided with a Gray-code disc, that the counter is constituted by an electronic counter including opto-electronic means which are adapted for detecting and registering rotation of the Gray-code disc, and a display showing the gas consumption or an equivalent value, e.g. energy in kWh.
  • the diaphragm gas meter according to the invention may further be advantageously designed so that the electronic counter also includes a number of electronic temperature sensors which are disposed so that the temperature at the outer side of the measuring vessel and the temperature at a known distance from the outer side of the measuring vessel are detected continuously, and a programmable unit which based on temperature measurements is adapted to extrapolate a corrected temperature of the gas internally of the measuring vessel.
  • the diaphragm gas meter according to the invention may advantageously be further designed so that by using the said corrected temperature of the gas, the programmable unit is also adapted for performing a continuous correction of the gas consumption shown in the display.
  • the diaphragm gas meter according to the invention is suitably designed so that the opto-electronic means are constituted by a number of interacting light and photo diodes which are disposed in pairs at each their side of the Gray-code disc with such mutual disposition that the entire surface of the Gray-code disc is preferably covered.
  • Fig. 1 shows a perspective view of an embodiment of a diaphragm gas meter according to the invention with a measuring vessel with separate inlet and outlet branches and an electronic counter;
  • Fig. 2 shows a perspective view of a second embodiment of a diaphragm gas meter according to the invention with a measuring vessel with one concentric inlet and outlet branch and with an electronic counter;
  • Fig. 3 shows a view of a measuring vessel, cf. Fig. 2, shown with the counter dismounted;
  • Fig. 4 shows a view of an open cabinet for an electronic counter where a specially designed Gray-code disc is shown in addition;
  • Fig. 5 shows a second view of an open cabinet with electronic counters
  • Fig. 6 shows a view of an embodiment of an electronic counter with a slot in which the Gray-code disc is rotated and registered by means of mutually interacting pairs of light and photo diodes; and Fig. 7 shows an embodiment of the electronic counter and the position of the Gray- code disc in relation to it.
  • Figs. 1 and 2 are shown two embodiments of diaphragm gas meters 2 and 4 according to the invention, where the diaphragm gas meter 2, cf. Fig. 1, is designed with separate inlet and outlet branches 6, 8, while the diaphragm gas meter 4, cf. Fig. 2, is designed with a common concentric inlet and outlet branch 10.
  • the diaphragm meters 2 and 4 both have a measuring vessel 12 of metal and an electronic counter 14.
  • the diaphragm gas meter 4 is shown in Fig. 3 with dismounted counter, so that an external measuring wheel in the form of a toothed wheel 16 of a mechanical magnetic coupling providing a gastight coupling between a conventional measuring member internally of the measuring vessel 12 and the toothed wheel 16.
  • this is shown with mounted Gray-code disc 18 which is disposed on the toothed wheel 16 in an open cabinet 17, and which just may seen faintly in Fig. 5 behind the contents of the electronic counter 14, which has an external electronic temperature sensor 20.
  • This external temperature sensor 20 detects the temperature at a distance from the measuring vessel 12 of about 25 mm, while a second temperature sensor 22 (Fig. 6) may be inserted through an opening 24 (Fig. 4) at the rear side of the cabinet 17 for the counter 14 with the object of detecting the temperature at the outer side of the measuring vessel 12.
  • a second temperature sensor 22 (Fig. 6) may be inserted through an opening 24 (Fig. 4) at the rear side of the cabinet 17 for the counter 14 with the object of detecting the temperature at the outer side of the measuring vessel 12.
  • the electronic counter 14 which is provided on a printed circuit board 19 which is designed with a slot 21 in which the Gray-code disc 18 is rotated.
  • the electronic counter 14 which is provided on a printed circuit board 19 which is designed with a slot 21 in which the Gray-code disc 18 is rotated.
  • the counter 14 includes an electronic display 26 on which the detected consumption of gas may be read in cubic meters.
  • the counter 14 also includes a programmable unit
  • Gas entering the meter has a temperature of 5°C, while the surroundings are at a temperature of 25°C. This situation is realistic when the meter is located in a scullery (25°C) and the gas comes from outside through the wall (5°C). Before the gas comes out of the meter, it has been heated up to e.g. 20°C because the meter is acting as a heat exchanger in relation to the surroundings. Inside the meter it is thus possible to find temperatures spanning from 5°C at the inlet to 20°C at the outlet. Only one of these temperatures is correct for calculation of the standard volume, and that is of course the outlet temperature of 2O 0 C. Since the outlet temperature depends on both the inlet temperature and the ambient temperature, the outlet temperature can be calculated from these. The ambient temperature is measured at 25 0 C and the surface temperature is measured at about 22°C. The latter is somewhere at a point between the inlet temperature and the ambient temperature.
  • Gray-code is a code which is much used in mechanical-electronic measurements.
  • the Gray-code has the advantage that only one bit at a time can change value.
  • the Gray- code may be used for indicating the position of a shaft by means of a disc coded in Gray-code, i.e.
  • Gray-code disc enables more detections in one revolution, whereby it is possible precisely to determine the flow rate (volume per time unit). When the flow rate can be determined, it is possible to compensate the meter for its inherent error curve, increasing the accuracy of the volumetric measurement.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

A method for volumetric of gas by means of a diaphragm gas meter (4) with a measuring vessel (12) and with a gastight coupling to an external measuring wheel (16), where Gray-code disc (18) is used as rotation indicator mounted on the external measuring wheel (16), where opto-electronic means (23, 25) are used for detecting the rotation of the Gray-code disc, where a number of temperature measurements are performed on and spaced apart from the measuring vessel (12), and where the temperature of the gas at an outlet branch of the measuring vessel (12) or in it is determined by extrapolation based on the temperature measurements. A diaphragm gas meter (4) using the above mentioned method and including a measuring vessel (12) with an inlet and outlet branch, a gastight coupling to an external measuring wheel (16) which is adapted for interacting with a counter (14) showing the gas consumption, where the external measuring wheel (16) is provided with a Gray-code disc (18), where the counter is constituted by an electronic counter (14) including opto-electronic means (23, 25) which are adapted for detecting and registering rotation of the Gray-code disc (18), and a display (26) showing the gas consumption or an equivalent value, e.g. energy in kWh.

Description

Method for volumetric measuring of gas and diaphragm gas meter
Field of the Invention
The present invention concerns a method for volumetric measuring of gas and of the kind indicated in the preamble of claim 1.
The invention also concerns a diaphragm gas meter of the kind indicated in the preamble of claim 4 which uses the method according the invention.
Background of the Invention
For registering the gas consumption, particularly in the private sector, diaphragm gas meters are widely used, e.g. mechanical diaphragm gas meters which are known to have a stable measuring principle, a large dynamic range and a low production cost. By volumetric measuring with a mechanical diaphragm meter, normally no allowance is made to the condition of the gas (pressure and temperature).
As the pressure is always constant, in practice it is only the temperature which can vary. Payment for the gas occurs at a so-called normal condition, why the gas company for diaphragm gas meters will perform a correction of the gas bill so that the consumer is billed according to a standard volume with a well-defined energy density.
If the gas temperature is constant, there are no problems in the above mentioned procedure, but in many countries, e.g. Denmark, a large part of the gas meters are located in the outdoors, meaning that the gas temperature will vary according the temperature of the weather. A pre-defined correction factor will yield an error when the temperature of the gas rises or drops.
WO 2004/079301 A2, WO2004/079302 A2 and WO 2004/079648 disclose optical detecting devices for gas meters, comprising a consumption indicator in the form of a rotating disc which is designed with at least one active sector as well as optical elements of the emitter type and receiver type disposed opposite to the disc. The received optical signal is used for indicating the number of revolutions of the disc. This comprises, cf. document '301, at least three active sectors with a central angle of 120°, as each sector has a surface coating with different colours; according to document '302, the disc has an opaque active sector with a central angle of 45-225°, and according to document '648, the disc has an active reflecting sector with a central angle of 45-225°.
Object of the Invention
On this background, the invention has the object of indicating an improved method for volumetric measurement of gas and of the kind specified in the introduction, and which by means of simple method steps enables achieving a more precise and just settlement of gas consumption.
The invention also has the purpose of indicating an improved diaphragm gas meter of the kind mentioned in the introduction, and which by means of simple technical means under the application of the method according to the invention enables providing a more precise and robust gas meter which furthermore supports a more just settlement of gas consumption, and which may ensure correct data by remote reading.
Description of the Invention
The method according to the invention is characterised in that a Gray-code disc is used as rotation indicator mounted on the external measuring wheel, that opto-electronic means are used for detecting the rotation of the Gray-code disc, that a number of temperature measurements are performed on and spaced apart from the measuring vessel, and that the temperature of the gas at an outlet branch of the measuring vessel or in it is determined by extrapolation based on the temperature measurements. By means of simple method measures it hereby becomes possible to achieve a more precise and just settlement of gas consumption, which is also the case by remote reading where it is particularly important to ensure correct measuring data.
hi that connection it is regarded as essential that detection of the rotation of the Gray- code disc is effected by means of opto-electronic means, i.e. without any kind of friction which may influence the measuring result. Besides, it is important that the use of the Gray-code disc enables detecting the volume with high resolution, i.e. even small volumes are measured with great accuracy, which is particularly important when testing the meter. At the same time, it is of course also significant that it also becomes possible in a simple way to compensate for possible temperature differences of the gas which may influence the accuracy of the volumetric gas measurement serving directly as a payment parameter.
It may furthermore be advantageous to modify the method according to the invention in such a way that an electronic counter is used, which by interaction with electronic temperature sensors are continuously performing temperature measurements, and by means of a programmable unit is continuously determining a corrected temperature of the gas at the outlet branch of the measuring vessel by the said extrapolation.
The method according to the invention may suitably be performed in such a way that the detecting of the rotation of the Gray-code disc is performed by the opto-electronic means in the form of light and photo diodes interacting in pairs.
The invention also concerns a diaphragm gas meter of the kind specified in the introduction, which diaphragm gas meter is characterised in that the external measuring wheel is provided with a Gray-code disc, that the counter is constituted by an electronic counter including opto-electronic means which are adapted for detecting and registering rotation of the Gray-code disc, and a display showing the gas consumption or an equivalent value, e.g. energy in kWh.
The diaphragm gas meter according to the invention may further be advantageously designed so that the electronic counter also includes a number of electronic temperature sensors which are disposed so that the temperature at the outer side of the measuring vessel and the temperature at a known distance from the outer side of the measuring vessel are detected continuously, and a programmable unit which based on temperature measurements is adapted to extrapolate a corrected temperature of the gas internally of the measuring vessel.
The diaphragm gas meter according to the invention may advantageously be further designed so that by using the said corrected temperature of the gas, the programmable unit is also adapted for performing a continuous correction of the gas consumption shown in the display.
The diaphragm gas meter according to the invention is suitably designed so that the opto-electronic means are constituted by a number of interacting light and photo diodes which are disposed in pairs at each their side of the Gray-code disc with such mutual disposition that the entire surface of the Gray-code disc is preferably covered.
Description of the Drawing
The invention is explained more closely in the following with reference to the drawing, on which:
Fig. 1 shows a perspective view of an embodiment of a diaphragm gas meter according to the invention with a measuring vessel with separate inlet and outlet branches and an electronic counter;
Fig. 2 shows a perspective view of a second embodiment of a diaphragm gas meter according to the invention with a measuring vessel with one concentric inlet and outlet branch and with an electronic counter;
Fig. 3 shows a view of a measuring vessel, cf. Fig. 2, shown with the counter dismounted;
Fig. 4 shows a view of an open cabinet for an electronic counter where a specially designed Gray-code disc is shown in addition;
Fig. 5 shows a second view of an open cabinet with electronic counters;
Fig. 6 shows a view of an embodiment of an electronic counter with a slot in which the Gray-code disc is rotated and registered by means of mutually interacting pairs of light and photo diodes; and Fig. 7 shows an embodiment of the electronic counter and the position of the Gray- code disc in relation to it.
Detailed Description of the Invention hi Figs. 1 and 2 are shown two embodiments of diaphragm gas meters 2 and 4 according to the invention, where the diaphragm gas meter 2, cf. Fig. 1, is designed with separate inlet and outlet branches 6, 8, while the diaphragm gas meter 4, cf. Fig. 2, is designed with a common concentric inlet and outlet branch 10. The diaphragm meters 2 and 4 both have a measuring vessel 12 of metal and an electronic counter 14.
The diaphragm gas meter 4 is shown in Fig. 3 with dismounted counter, so that an external measuring wheel in the form of a toothed wheel 16 of a mechanical magnetic coupling providing a gastight coupling between a conventional measuring member internally of the measuring vessel 12 and the toothed wheel 16. hi Fig. 4, this is shown with mounted Gray-code disc 18 which is disposed on the toothed wheel 16 in an open cabinet 17, and which just may seen faintly in Fig. 5 behind the contents of the electronic counter 14, which has an external electronic temperature sensor 20.
This external temperature sensor 20 detects the temperature at a distance from the measuring vessel 12 of about 25 mm, while a second temperature sensor 22 (Fig. 6) may be inserted through an opening 24 (Fig. 4) at the rear side of the cabinet 17 for the counter 14 with the object of detecting the temperature at the outer side of the measuring vessel 12. On Fig. 6 appears the electronic counter 14 which is provided on a printed circuit board 19 which is designed with a slot 21 in which the Gray-code disc 18 is rotated. At each their side of the slot 21, cf. Fig. 6, there are mounted 3 pairs of interacting light and photo diodes 23, 25 continuously sensing the rotation of Gray- code disc 18 which is disposed as shown on Fig. 7, i.e. so that the Gray-code disc 18 is rotated between the interacting pairs of light and photo diodes 23, 25.
The counter 14 includes an electronic display 26 on which the detected consumption of gas may be read in cubic meters. The counter 14 also includes a programmable unit
27 adapted to, on the basis of the temperature t surroundings and tsurface, respectively, measured by respective temperature sensors 20, 22, to perform automatically the required correction of the discharge temperature of the gas leaving the measuring vessel 12, and which on the basis of determining the so-called normal volume of the gas forming basis of the payment to the gas company. Such temperature compensation is particularly important in case of temperature differences between the surroundings and the gas, which is elucidated by the following:
Example:
Gas entering the meter has a temperature of 5°C, while the surroundings are at a temperature of 25°C. This situation is realistic when the meter is located in a scullery (25°C) and the gas comes from outside through the wall (5°C). Before the gas comes out of the meter, it has been heated up to e.g. 20°C because the meter is acting as a heat exchanger in relation to the surroundings. Inside the meter it is thus possible to find temperatures spanning from 5°C at the inlet to 20°C at the outlet. Only one of these temperatures is correct for calculation of the standard volume, and that is of course the outlet temperature of 2O0C. Since the outlet temperature depends on both the inlet temperature and the ambient temperature, the outlet temperature can be calculated from these. The ambient temperature is measured at 250C and the surface temperature is measured at about 22°C. The latter is somewhere at a point between the inlet temperature and the ambient temperature.
By a number of test measurements, this relative connection has been determined to the following empirical formula: t outlet = t surface + (t surface _ t surroundings) χ ^ where R [& determined as Qjh
The above example yields the following: t outlet = 22 + (22 - 25) x 0,71 = 19,87 (i.e. very close to 200C).
Rotation of the Gray-code disc 18 is detected according to the invention by a number of mutually interacting pairs of light and photo diodes, preferably 3 pairs, which as part of the electronic counter 14 is continuously providing for counting and registering the rotation of the Gray-code disc 18. Gray-code is a code which is much used in mechanical-electronic measurements. The Gray-code has the advantage that only one bit at a time can change value. The Gray- code may be used for indicating the position of a shaft by means of a disc coded in Gray-code, i.e. with light/transparent and dark/opaque concentric annular areas with varying angular extension, or which, as by the invention, by means of a disc having a shape forming Gray-code by itself, and the angular position or rotation of which is detected by means of a number of light and photo diodes which are disposed in pairs at each their side of the Gray-code disc with such mutual position that the entire surface of the Gray-code disc preferably is covered.
Use of a Gray-code disc enables more detections in one revolution, whereby it is possible precisely to determine the flow rate (volume per time unit). When the flow rate can be determined, it is possible to compensate the meter for its inherent error curve, increasing the accuracy of the volumetric measurement.

Claims

1. A method for volumetric measuring of gas by means of a diaphragm gas meter (4) with a measuring vessel (12) and with a gastight coupling to an external measuring wheel (16), characterised in that a Gray-code disc (18) is used as rotation indicator which is mounted on the external measuring wheel (16), that opto-electronic means (23, 25) are used for detecting the rotation of the Gray-code disc, that a number of temperature measurements are performed on and spaced apart from the measuring vessel (12), and that the temperature of the gas at an outlet branch of the measuring vessel (12) or in it is determined by extrapolation based on the temperature measurements.
2. Method according to claim 1, characterised in that an electronic counter (14) is used, which by interaction with electronic temperature sensors (20, 22) are continuously performing temperature measurements, and by means of a programmable unit is continuously determining a corrected temperature of the gas at the outlet branch of the measuring vessel (12) by the said extrapolation.
3. Method according to claim 1, characterised in that the detecting of the rotation of the Gray-code disc is performed by the opto-electronic means in the form of light and photo diodes (23, 25) interacting in pairs.
4. A diaphragm gas meter using the method according to claim 1 and including a measuring vessel (12) with an inlet and outlet branch, a gastight coupling to an external measuring wheel (16) which is adapted for interacting with a counter (14) showing the gas consumption, characterised in that the external measuring wheel (16) is provided with a Gray-code disc (18), that the counter is constituted by an electronic counter (14) including opto-electronic means (23, 25) which are adapted for detecting and registering rotation of the Gray-code disc (18), and a display (26) showing the gas consumption or an equivalent value, e.g. energy in kWh.
5. Diaphragm gas meter according to claim 4, characterised in that the electronic counter (14) also includes a number of electronic temperature sensors (20, 22) which are disposed so that the temperature at the outer side of the measuring vessel (12) and the temperature at a known distance from the outer side of the measuring vessel (12) may be detected continuously, and a programmable unit (17) which based on temperature measurements is adapted to extrapolate a corrected temperature of the gas at the outlet branch of the measuring vessel (12).
6. Diaphragm gas meter according to claim 4 and 5, characterised in that by using the said corrected temperature of the gas, the programmable unit (27) is also adapted for performing a continuous correction of the gas consumption shown in the display (26).
7. Diaphragm gas meter according to claim 4, characterised in that the optoelectronic means are constituted by a number of interacting light and photo diodes (23, 25) which are disposed in pairs at each their side of the Gray-code disc (18) with such mutual disposition that the entire surface of the Gray-code disc (18) is preferably covered.
PCT/DK2005/000797 2005-12-16 2005-12-16 Method for volumetric measuring of gas and diaphragm gas meter WO2007068242A1 (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN102012238A (en) * 2010-03-04 2011-04-13 罗文华 Wireless remote transmission fiber reading meter
CN105102933A (en) * 2013-01-07 2015-11-25 萨基姆通讯能源及电信联合股份公司 Kit for retrofit of a meter with a remote-reading device
FR3052254A1 (en) * 2016-06-07 2017-12-08 Stmicroelectronics Rousset DEVICE FOR DETERMINING THE MOTION OF A ROTARY MEMBER, ESPECIALLY FOR WATER AND / OR GAS COUNTER TESTS
EP2249133B1 (en) 2009-05-07 2019-10-16 Itron GmbH Gas meter
CN113639832A (en) * 2021-08-12 2021-11-12 宁波水表(集团)股份有限公司 Method and system for detecting influence factors of water meter metering precision

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US5565861A (en) * 1993-12-23 1996-10-15 Gwf Gas-Und Wassermesserfabrik Ag Multidigit counting wheel mechanism for a volume-measuring instrument
US20040130459A1 (en) * 2002-09-13 2004-07-08 Ramirez Anibal Diego Electricity meter having gas consumption correction processing
WO2004079301A2 (en) * 2003-02-05 2004-09-16 Actaris S.A.S. Optical detection device for a counter
WO2004090832A1 (en) * 2003-04-07 2004-10-21 Bluemax Communication Co., Ltd. Automatic meter reading terminals and system using a rotary encoder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390956A (en) * 1981-03-06 1983-06-28 The Singer Company Apparatus for correcting measured gas flow
US5565861A (en) * 1993-12-23 1996-10-15 Gwf Gas-Und Wassermesserfabrik Ag Multidigit counting wheel mechanism for a volume-measuring instrument
US20040130459A1 (en) * 2002-09-13 2004-07-08 Ramirez Anibal Diego Electricity meter having gas consumption correction processing
WO2004079301A2 (en) * 2003-02-05 2004-09-16 Actaris S.A.S. Optical detection device for a counter
WO2004090832A1 (en) * 2003-04-07 2004-10-21 Bluemax Communication Co., Ltd. Automatic meter reading terminals and system using a rotary encoder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2249133B1 (en) 2009-05-07 2019-10-16 Itron GmbH Gas meter
CN102012238A (en) * 2010-03-04 2011-04-13 罗文华 Wireless remote transmission fiber reading meter
CN102012238B (en) * 2010-03-04 2012-09-12 罗文华 Wireless remote transmission fiber reading meter
CN105102933A (en) * 2013-01-07 2015-11-25 萨基姆通讯能源及电信联合股份公司 Kit for retrofit of a meter with a remote-reading device
FR3052254A1 (en) * 2016-06-07 2017-12-08 Stmicroelectronics Rousset DEVICE FOR DETERMINING THE MOTION OF A ROTARY MEMBER, ESPECIALLY FOR WATER AND / OR GAS COUNTER TESTS
US10215594B2 (en) 2016-06-07 2019-02-26 Stmicroelectronics (Rousset) Sas Device for determining the movement of a rotary element, particularly for readings of water and/or gas meters
US10648836B2 (en) 2016-06-07 2020-05-12 Stmicroelectronics (Rousset) Sas Device for determining the movement of a rotary element, particularly for readings of water and/or gas meters
US11079256B2 (en) 2016-06-07 2021-08-03 Stmicroelectronics (Rousset) Sas Device for determining the movement of a rotary element, particularly for readings of water and/or gas meters
CN113639832A (en) * 2021-08-12 2021-11-12 宁波水表(集团)股份有限公司 Method and system for detecting influence factors of water meter metering precision
CN113639832B (en) * 2021-08-12 2024-02-13 宁波水表(集团)股份有限公司 Detection method and monitoring system for water meter measurement accuracy influence factors

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