WO2011040038A1 - 超音波流量計 - Google Patents
超音波流量計 Download PDFInfo
- Publication number
- WO2011040038A1 WO2011040038A1 PCT/JP2010/005900 JP2010005900W WO2011040038A1 WO 2011040038 A1 WO2011040038 A1 WO 2011040038A1 JP 2010005900 W JP2010005900 W JP 2010005900W WO 2011040038 A1 WO2011040038 A1 WO 2011040038A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ultrasonic
- flow path
- measurement
- wall
- channel
- Prior art date
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Classifications
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- 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
- G01F15/14—Casings, e.g. of special material
-
- 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
Definitions
- the present invention relates to a flow meter for measuring a household gas flow rate by ultrasonic waves.
- the conventional ultrasonic anemometer includes a housing 101, a flow channel 102, a pair of ultrasonic sensors 103 disposed in the flow channel 102, and an ultrasonic wave between the pair of ultrasonic sensors 103.
- Propagation time measuring means 104 for measuring the propagation time and flow rate calculating means 105 for calculating the flow rate from the propagation time by calculation are provided.
- the flow path 102 is contained in the housing 101, and the gas that is the fluid to be measured leaks out of the flow meter by isolating the inside of the housing 101 through which the fluid to be measured flows from the outside of the housing 101. It wasn't supposed to be.
- the conventional ultrasonic flowmeter isolates the inside of the housing 101 from the outside, it is necessary to draw the signal line 107 of the ultrasonic sensor 103 into the housing 101 while keeping the airtightness. For this reason, a complicated configuration such as the hermetic seal 106 is adopted, and as a result, the manufacturing cost tends to be high and the manufacturing itself tends to be complicated.
- the present invention solves the above-described conventional problems, and an object thereof is to provide an ultrasonic flowmeter that can eliminate the need for a complicated structure such as a hermetic seal and can easily realize an ultrasonic flowmeter at low cost. .
- an ultrasonic flowmeter of the present invention includes a flow path having an inlet and an outlet for a fluid to be measured, and a flow path having an opening formed between the inlet and the outlet of the flow path.
- a main body a measurement channel inserted into the channel from the opening and communicating with the inlet and the outlet, a wall disposed on a side surface of the measurement channel to cover the opening, and an ultrasonic signal attached to the wall
- a measurement unit comprising a pair of ultrasonic sensors for transmitting a signal, and flow rate calculation means for calculating a flow rate by measuring a propagation time of an ultrasonic signal between the ultrasonic sensors, and an outer periphery of the wall and the opening It is the structure which seals with a part.
- the measurement unit having the ultrasonic sensor is inserted into the opening of the flow channel body, the opening of the flow channel body and the wall of the measurement unit are joined while taking a seal structure. Therefore, a configuration can be adopted in which the fluid to be measured does not leak.
- FIG. 1 It is a schematic sectional drawing which shows the structural example of the ultrasonic flowmeter in Embodiment 1 of this invention. It is a perspective view which shows the example of an external appearance structure of the ultrasonic flowmeter shown in FIG. (A) is a schematic sectional drawing which shows the principal part structural example from arrow A in the ultrasonic flowmeter shown in FIG. 2, (b) is from arrow B in the ultrasonic flowmeter shown in FIG. It is a principal part structural example, and is a schematic sectional drawing equivalent to CC sectional view taken on the line of the ultrasonic flowmeter shown to (a).
- (A) is a schematic sectional drawing which shows the structural example of the ultrasonic flowmeter in Embodiment 2 of this invention
- (b) is DD sectional view taken on the line of the ultrasonic flowmeter shown to (a). It is. It is a schematic sectional drawing which shows the structural example of the conventional ultrasonic flowmeter.
- the present invention includes a channel having an inlet and an outlet for a fluid to be measured, a channel body having an opening formed between the inlet and the outlet of the channel, and the inlet inserted into the channel from the opening. And a measurement flow path that communicates with the outlet, a wall that is disposed on a side surface of the measurement flow path to cover the opening, and a pair of ultrasonic sensors that are attached to the wall and transmit ultrasonic signals, An ultrasonic flowmeter configured to measure a propagation time of an ultrasonic signal between the ultrasonic sensors and calculate a flow rate, and to seal between the wall and the outer peripheral portion of the opening.
- the measurement unit having an ultrasonic sensor is inserted into the opening of the flow channel body, the opening of the flow channel body and the wall of the measurement unit are joined while taking a seal structure. Can do. Therefore, since the fluid to be measured can be prevented from leaking, it can be avoided that the fluid to be measured flows in the flow path but goes out of the flow path main body.
- the ultrasonic sensor since the ultrasonic sensor is attached as a measurement unit, it can be detached from the flow path body, making maintenance easier and realizing an easy-to-use ultrasonic flow meter.
- the measurement channel has a rectangular channel cross section
- the flow velocity is stabilized and the measurement accuracy can be improved.
- the wall forming a part of the measurement flow channel can be a flat plate and can be sealed by a simple method.
- the pair of ultrasonic sensors are arranged on the same surface of the wall, and at least once on the inner wall of the flow path opposed to the ultrasonic signal transmitted from one ultrasonic sensor. Any structure may be used as long as it is reflected and received by the other ultrasonic sensor. Thereby, by arranging the ultrasonic sensor on one side, the opening of the flow channel and the wall of the measurement flow channel can be easily sealed.
- the flow path is formed in a U shape, and a buffer portion having a cross-sectional area larger than the cross-sectional area of the measurement flow path is formed between the inlet and the measurement flow path. Any configuration may be used. As a result, the flow rate of the fluid to be measured flowing from the inlet is reduced by the buffer portion and then introduced into the measurement flow path, so that the gas flow can be smoothly converted in a right angle direction.
- the measurement flow path is divided into a plurality of flow directions by a flat plate-like divided member arranged in parallel to the radiation direction of the ultrasonic signal transmitted from the ultrasonic sensor. Any configuration can be used. Thereby, measurement accuracy can be improved by measuring in the state where the flow was stabilized by the rectification effect of a division member.
- the dividing member may be arranged in parallel to the inflow direction of the fluid to be measured from the inlet of the flow path.
- the cross section of the measurement flow path may be configured to be smaller than the cross section of the flow path, and the partition portion may be configured in the gap between the measurement flow path and the flow path.
- the ultrasonic flow meter 10 (flow rate measuring device) of the present embodiment includes a measurement unit 11 attached to an opening 1 c provided in the flow path body 1.
- the flow channel body 1 is a part of a pipe through which the fluid to be measured flows, and the inside of the flow channel body 1 is a flow channel 8.
- the flow path body 1 is provided with an opening 1c on the side wall thereof, and the ultrasonic flowmeter 10 can be attached to the opening 1c.
- the ultrasonic flowmeter 10 is partitioned into a circuit chamber 9 in which the flow path body 1 and a control circuit are accommodated by a partition wall 1d.
- the flow channel main body 1 has an inlet 1a and an outlet 1b for a fluid to be measured, and further includes a partition 1e for partitioning the inlet 1a side and the outlet 1b side when a measurement unit 11 described later is inserted. I have.
- the partition wall 1d is provided with an opening 1c for inserting the measurement unit 11. As shown in FIG. 2, if the measurement flow path 2 of the measurement unit 11 is inserted into the opening 1c, As shown in FIG. 1, the inlet 1 a and the outlet 1 b of the flow channel main body 1 are separated by the partition portion 1 e except for the measurement flow channel 2, and therefore communicate with each other only by the measurement flow channel 2.
- the measuring unit 11 is provided with a flange 11a for screwing.
- the measurement unit 11 is fixed to the flow path body 1 with screws 14 in a state in which the sealing material 7 is disposed between the wall 6 and the partition wall 1d. .
- the opening 1c is sealed, so that leakage of the fluid to be measured from the flow path body 1 to the circuit chamber 9 is prevented.
- the opening 1c is not given a reference sign.
- the measurement unit 11 includes a measurement channel 2 through which a fluid to be measured passes, a wall 6 provided on a side surface of the measurement channel 2, and a pair of ultrasonic sensors 3 arranged on the wall 6 at a predetermined angle. .
- the measurement channel 2 is located inside the channel body 1 (that is, in the channel 8) when the measurement unit 11 is attached to the opening 1c.
- a wall 6 is provided on the side surface of the measurement flow path 2, and when the measurement flow path 2 is located in the opening 1c, it is outside the opening 1c and covers the opening 1c. It is configured as a simple shape.
- the measurement unit 11 includes a pair of ultrasonic sensors 3, one of these ultrasonic sensors 3 is located downstream of the flow direction of the fluid under measurement in the measurement flow path 2 (block arrow in the figure), and the other is upstream. Located on the side. These ultrasonic sensors 3 are arranged on the same surface of the measurement flow path 2 in such a positional relationship that ultrasonic waves transmitted from one side are reflected once on the inner wall of the measurement flow path 2 and can be received by the other. Yes.
- the measurement channel 2 the ultrasonic sensor 3, the wall 6 and the like constituting the measurement unit 11 are not particularly limited, and a known channel tube, an ultrasonic transducer, and a plate-like member are preferably used. it can.
- the pair of ultrasonic sensors 3 is connected to the propagation time measuring means 4, and the propagation time measuring means 4 is connected to the flow rate calculating means 5.
- the propagation time measuring means 4 measures the time (propagation time) until the ultrasonic signal transmitted from one ultrasonic sensor 3 is received by the other ultrasonic sensor 3 through reflection of the inner wall, and the flow rate is measured.
- the calculating means 5 calculates the flow rate of the fluid to be measured from this propagation time.
- the propagation time measuring means 4 and the flow rate calculating means 5 are provided in the circuit chamber 9.
- the specific configurations of the propagation time measuring means 4 and the flow rate calculating means 5 are not particularly limited.
- the propagation time measuring means 4 may be a known circuit that can measure the propagation time of ultrasonic waves between the ultrasonic sensors 3, and the flow rate calculating means 5 calculates the flow rate from the propagation time measured by the propagation time measuring means 4. Any known circuit that can be calculated may be used.
- the propagation time measuring unit 4 and the flow rate calculating unit 5 are combined as a single control circuit 12 in the present embodiment. For example, a configuration in which each circuit as the propagation time measuring unit 4 and the flow rate calculating unit 5 is a circuit board mounted on one board can be given.
- the propagation time measuring means 4 and the flow rate calculating means 5 may be a functional configuration of a controller. That is, for example, a CPU as a controller is mounted on the control circuit 12, and the CPU may be realized by operating according to a program stored in a storage unit such as a memory (not shown). .
- a storage unit such as a memory (not shown).
- the propagation time measuring means 4 and the flow rate calculating means 5 constitute a circuit unit or a functional unit in the ultrasonic flowmeter 10, these constituent elements are the propagation time measuring means in this embodiment. 4 can be read as propagation means measuring instrument or propagation means measuring section, and the flow rate calculating means 5 can be read as flow rate calculator or flow rate calculating section.
- the ultrasonic sensor 3 and the control circuit 12 are connected by a lead wire as shown in FIG. Is not limited to this, and may be configured to be directly connected to a substrate or the like on which the control circuit 12 is mounted by a configuration such as a lead pin, or may be another known configuration.
- the wall 6 of the measurement unit 11 is configured to cover the opening 1c, and the wall 6 and the opening are provided. Sealing is performed between the outer periphery of 1c. Specifically, a sealing material 7 is provided between the partition wall 1d and the wall 6, and a known simple configuration can be suitably used as the sealing material 7. Therefore, a configuration in which the fluid to be measured does not leak can be easily realized without using a member such as a hermetic seal.
- the wall 6 can be a flat plate. Therefore, the wall 6 and the partition wall 1d which is the outer peripheral portion of the opening 1c can be overlapped so as to be in close contact with each other. Therefore, the opening 1c can be sealed by a simple method. Furthermore, in this embodiment, since the “V path” that reflects the ultrasonic wave once by the inner wall of the measurement flow path 2 is adopted, the ultrasonic sensor 3 can be installed on the same surface. Therefore, the opening 1c can be sealed with a simpler configuration as compared with the configuration in which the ultrasonic sensor 3 is disposed so as to sandwich the flow path.
- the flow channel from the inlet 1a to the outlet 1b is formed in a U-shape, but between the inlet 1a and the measurement flow channel 2, FIG. As shown in b), a buffer unit 15 is provided.
- the fluid to be measured that has flowed into the ultrasonic flowmeter 10 from the inlet 1 a is introduced into the measurement channel 2 after the flow velocity is reduced in the buffer unit 15.
- the flow of the fluid to be measured can be smoothly converted in the right-angle direction.
- the dividing member 2a is disposed along a direction parallel to the radiation direction (transmission direction) of the ultrasonic signal transmitted from the ultrasonic sensor 3. Since the flow of the fluid to be measured is rectified by providing the dividing member 2a in this manner, measurement can be performed in a state where the flow of the fluid to be measured is stable, and the measurement accuracy can be improved.
- gas is exemplified as the fluid to be measured, but the present invention is not limited to this, and the ultrasonic flowmeter 10 of the present embodiment is suitably used even for other known fluids. be able to.
- the ultrasonic flowmeter 10 of this Embodiment is equipped with the flow-path main body 1 which divides
- FIGS. 4 (a) and 4 (b) show an ultrasonic flow meter 16 (flow rate measuring device) in the present embodiment, and the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals. Therefore, the overlapping description is omitted. Also, in FIGS. 4A and 4B, for convenience of explanation, the reference numerals for some elements are omitted.
- the basic configuration of the ultrasonic flowmeter 16 is the same as that of the ultrasonic flowmeter 10 of the first embodiment, but the measurement flow path 2 is divided.
- the dividing member 2a is arranged so as to be parallel to the inflow direction of the fluid to be measured from the inlet 1a.
- the ultrasonic velocimeter according to the present invention can easily realize a configuration in which the fluid to be measured does not leak from the measurement unit to the outside of the housing with a simple configuration, and can improve the maintainability. It can be widely used in an ultrasonic measuring apparatus such as an ultrasonic current meter that performs the above measurement.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
1a 入口
1b 出口
1c 開口部
2 計測流路
2a 分割部材
3 超音波センサ
5 流量算出手段
6 壁
8 流路
10、16 超音波流量計
11 計測ユニット
15 バッファ部
本発明の実施の形態1について図1~3に基づき説明する。図1に示すように、本実施の形態の超音波流量計10(流量計測装置)は、流路本体1に設けられた開口部1cに取り付けられている計測ユニット11等を備えている。
図1に示すように、流路本体1の入口1aと出口1bとは、計測流路2を除いて仕切り部1eで仕切られるので、この計測流路2のみで連通することになる。
本発明の実施の形態2について図4(a),(b)に基づき説明する。図4(a),(b)は、本実施の形態における超音波流量計16(流量計測装置)を示すもので、実施の形態1と同一又は相当する要素には同一の参照符号を付して、その重複する説明を省略する。また、図4(a),(b)においては、説明の便宜上、一部の要素に符号を付すことを省略している。
Claims (7)
- 被測定流体の入口及び出口を有する流路と、
前記流路の入口及び出口間に形成された開口部を有する流路本体と、
前記開口部から前記流路に挿入され前記入口及び出口を連通する計測流路と、
前記計測流路の側面に配置され前記開口部を覆う壁と、
前記壁に取り付けられ超音波信号を発信する一対の超音波センサとからなる計測ユニットと、
前記超音波センサ間の超音波信号の伝搬時間を計測し流量を算出する流量算出手段と、を備え、
前記壁と前記開口部の外周部とでシールを行うことを特徴とする、超音波流量計。 - 前記計測流路は、流路断面が矩形形状であることを特徴とする、請求項1記載の超音波流量計。
- 前記一対の超音波センサは、前記壁の同一面に配置され、一方の超音波センサから発信された超音波信号が対向する流路の内壁に少なくとも1回反射されて他方の超音波センサで受信される構成としたことを特徴とする、請求項2記載の超音波流量計。
- 前記流路は、U字状に形成され、前記入口と前記計測流路との間に、当該計測流路の断面積よりも大きな断面積を有するバッファ部を設けたことを特徴とする、請求項3記載の超音波流量計。
- 前記計測流路は、前記超音波センサから発信される超音波信号の放射方向に対して平行に配置された平板状の分割部材により流れ方向に複数に区分されたことを特徴とする、請求項4記載の超音波流量計。
- 前記分割部材は、前記流路の入口からの被測定流体の流入方向に平行に配置されたことを特徴とする、請求項5記載の超音波流量計。
- 前記計測流路の断面は、前記流路の断面より小さく構成し、前記計測流路と前記流路との隙間に仕切り部を構成したことを特徴とする、請求項1~5のいずれか1項に記載の超音波流量計。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011534087A JP5728639B2 (ja) | 2009-10-01 | 2010-09-30 | 超音波流量計 |
EP10820159A EP2485017A1 (en) | 2009-10-01 | 2010-09-30 | Ultrasonic flowmeter |
US13/499,254 US20120191382A1 (en) | 2009-10-01 | 2010-09-30 | Ultrasonic flow meter device |
CN201080043836XA CN102549395A (zh) | 2009-10-01 | 2010-09-30 | 超声波流量计 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009229443 | 2009-10-01 | ||
JP2009-229443 | 2009-10-01 |
Publications (1)
Publication Number | Publication Date |
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WO2011040038A1 true WO2011040038A1 (ja) | 2011-04-07 |
Family
ID=43825882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/005900 WO2011040038A1 (ja) | 2009-10-01 | 2010-09-30 | 超音波流量計 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120191382A1 (ja) |
EP (1) | EP2485017A1 (ja) |
JP (1) | JP5728639B2 (ja) |
CN (1) | CN102549395A (ja) |
WO (1) | WO2011040038A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017090268A (ja) * | 2015-11-11 | 2017-05-25 | 愛知時計電機株式会社 | 超音波流量計 |
US10704941B2 (en) | 2016-07-13 | 2020-07-07 | Gwf Messsysteme Ag | Flow meter with measuring channel |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5728657B2 (ja) * | 2009-10-01 | 2015-06-03 | パナソニックIpマネジメント株式会社 | 超音波流量計測ユニット |
JP2012132801A (ja) * | 2010-12-22 | 2012-07-12 | Panasonic Corp | 超音波流量計 |
JP6060378B2 (ja) * | 2012-11-13 | 2017-01-18 | パナソニックIpマネジメント株式会社 | 流量計測装置 |
FR3081999B1 (fr) * | 2018-05-30 | 2023-11-24 | Buerkert Werke Gmbh & Co Kg | Moyen de mesure de fluide et module de mesure de fluide pour un moyen de mesure de fluide |
CN109013092A (zh) * | 2018-10-26 | 2018-12-18 | 伟创力电子技术(苏州)有限公司 | 助焊剂液位和流量监控装置 |
JP7203302B2 (ja) * | 2019-03-29 | 2023-01-13 | パナソニックIpマネジメント株式会社 | 超音波流量計 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001141536A (ja) * | 1999-11-18 | 2001-05-25 | Yazaki Corp | 流量計測装置 |
JP2004257738A (ja) * | 2003-02-24 | 2004-09-16 | Ricoh Elemex Corp | 超音波流量計 |
JP2005172658A (ja) | 2003-12-12 | 2005-06-30 | Matsushita Electric Ind Co Ltd | 超音波流量計 |
JP2005189090A (ja) * | 2003-12-25 | 2005-07-14 | Aichi Tokei Denki Co Ltd | 超音波式水道メータ |
JP2005283565A (ja) * | 2004-03-02 | 2005-10-13 | Yazaki Corp | 流量計測装置 |
JP2008107288A (ja) * | 2006-10-27 | 2008-05-08 | Ricoh Elemex Corp | 超音波流量計 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7237441B2 (en) * | 2003-02-24 | 2007-07-03 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic type fluid measurement device |
DE102004060063B4 (de) * | 2004-12-14 | 2016-10-20 | Robert Bosch Gmbh | Einrichtung zur Strömungsmessung mittels Ultraschall |
DE102004061404A1 (de) * | 2004-12-21 | 2006-07-06 | Robert Bosch Gmbh | Ultraschall-Durchflussmesser und Verfahren zur Durchflussmessung mittels Ultraschall |
EP2180298A4 (en) * | 2007-07-09 | 2011-10-12 | Panasonic Corp | MULTILAYER CHANNEL ELEMENT FOR ULTRASONIC LIQUID MEASURING DEVICE AND ULTRASONIC LIQUID MEASURING DEVICE |
US7882751B2 (en) * | 2007-07-19 | 2011-02-08 | Endress + Hauser Flowtec Ag | Measuring system with a flow conditioner for flow profile stabilization |
WO2010070891A1 (ja) * | 2008-12-18 | 2010-06-24 | パナソニック株式会社 | 超音波式流量計 |
-
2010
- 2010-09-30 EP EP10820159A patent/EP2485017A1/en not_active Withdrawn
- 2010-09-30 JP JP2011534087A patent/JP5728639B2/ja not_active Expired - Fee Related
- 2010-09-30 CN CN201080043836XA patent/CN102549395A/zh active Pending
- 2010-09-30 US US13/499,254 patent/US20120191382A1/en not_active Abandoned
- 2010-09-30 WO PCT/JP2010/005900 patent/WO2011040038A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001141536A (ja) * | 1999-11-18 | 2001-05-25 | Yazaki Corp | 流量計測装置 |
JP2004257738A (ja) * | 2003-02-24 | 2004-09-16 | Ricoh Elemex Corp | 超音波流量計 |
JP2005172658A (ja) | 2003-12-12 | 2005-06-30 | Matsushita Electric Ind Co Ltd | 超音波流量計 |
JP2005189090A (ja) * | 2003-12-25 | 2005-07-14 | Aichi Tokei Denki Co Ltd | 超音波式水道メータ |
JP2005283565A (ja) * | 2004-03-02 | 2005-10-13 | Yazaki Corp | 流量計測装置 |
JP2008107288A (ja) * | 2006-10-27 | 2008-05-08 | Ricoh Elemex Corp | 超音波流量計 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017090268A (ja) * | 2015-11-11 | 2017-05-25 | 愛知時計電機株式会社 | 超音波流量計 |
US10704941B2 (en) | 2016-07-13 | 2020-07-07 | Gwf Messsysteme Ag | Flow meter with measuring channel |
US10746580B2 (en) | 2016-07-13 | 2020-08-18 | Gwf Messsysteme Ag | Flow meter with measuring channel |
Also Published As
Publication number | Publication date |
---|---|
JP5728639B2 (ja) | 2015-06-03 |
US20120191382A1 (en) | 2012-07-26 |
EP2485017A1 (en) | 2012-08-08 |
JPWO2011040038A1 (ja) | 2013-02-21 |
CN102549395A (zh) | 2012-07-04 |
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