DE29806374U1 - Flow meter with strain gauge sensor - Google Patents
Flow meter with strain gauge sensorInfo
- Publication number
- DE29806374U1 DE29806374U1 DE29806374U DE29806374U DE29806374U1 DE 29806374 U1 DE29806374 U1 DE 29806374U1 DE 29806374 U DE29806374 U DE 29806374U DE 29806374 U DE29806374 U DE 29806374U DE 29806374 U1 DE29806374 U1 DE 29806374U1
- Authority
- DE
- Germany
- Prior art keywords
- flow
- sensor
- strain gauge
- flow meter
- gauge sensor
- 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.)
- Expired - Lifetime
Links
- 238000005259 measurement Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims 1
- 238000011109 contamination Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—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 using mechanical effects
- G01F1/20—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 using mechanical effects by detection of dynamic effects of the flow
- G01F1/28—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 using mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
- G01P5/04—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using deflection of baffle-plates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Measuring Volume Flow (AREA)
Description
Durchflußmeßgerät mit DehnungsmeßstreifenfühlerFlow meter with strain gauge sensor
Die Erfindung betrifft eine Vorrichtung zum Messen von Strömungsgeschwindigkeiten flüssiger und gasförmiger Medien.The invention relates to a device for measuring flow velocities of liquid and gaseous media.
Bekannt ist, daß Durchflußmeßgeräte in der Meßtechnik Anwendung rinden. Es ist ein breites Spektrum geläufig.It is known that flow meters are used in measurement technology. A broad spectrum is common.
Zum Messen, der Strömungsgeschwindigkeit von Gasen, benutzt man Staudruckmeßgeräte bzw. Flügelradmeßgeräte.To measure the flow velocity of gases, dynamic pressure gauges or vane gauges are used.
Bei Flüssigkeiten nutzt man ebenfalls die kinetische Energie bzw. den Differenzdruck des strömenden Mediums.With liquids, the kinetic energy or the differential pressure of the flowing medium is also used.
Die gebräuchlichsten Meßfühler für Durchflußmessungen sind:The most common sensors for flow measurements are:
Blenden für Differenzdruck mit Ringwaage,
Stauscheibe, Staukegel,
Flügelrad,
und Überfall.Differential pressure orifices with ring balance,
baffle plate, baffle cone,
impeller,
and robbery.
Diese Meßgeräte reagieren sehr empfindlich auf Verschmutzung und Turbulenzen.These measuring devices are very sensitive to contamination and turbulence.
Der mechanische Verschleiß ist, durch sich bewegende Teile, relativ hoch.The mechanical wear is relatively high due to moving parts.
Eine Ausnahme bilden Meßfühler mit denen man die induktiven bzw. kapazitiven Eigenschaften strömender Medien nutzt um den Durchfluß zu ermitteln.An exception are sensors that use the inductive or capacitive properties of flowing media to determine the flow.
Sie reagieren empfindlich auf Temperatur und gelöste Inhaltstoffe.They react sensitively to temperature and dissolved ingredients.
Die Anschaffungskosten sind sehr hoch.The acquisition costs are very high.
Dehnungsmeßsteifen sind aus der Wägetechnik bekannt.Strain gauges are known from weighing technology.
Mit diesen werden mechanische Spannungen von Bauteilen gemessen.These are used to measure mechanical stresses in components.
Eine elektronische Meßdatenverarbeitung ( Schnittstelle) ist möglich.Electronic measurement data processing (interface) is possible.
Diese positiven Eigenschaften werden erfindungsgemäß im Durchflußdehnungsmeßstreifenfühler (DDMF) angewendet Der DDMF ist ein einfaches, robustes und zuverlässiges Meßgerät mit hohem Gebrauchswert.These positive properties are used according to the invention in the flow strain gauge sensor (DDMF) The DDMF is a simple, robust and reliable measuring device with high utility value.
Die Fertigung ist als Zungen- und als Ringmeßfuhler möglich.Production is possible as a tongue or ring sensor.
Ausfuhrungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are shown in the drawings and are described in more detail below.
Es zeigen:Show it:
Figur 1: schematische Darstellung des Zungenmeßfuhlers Figur 2: schematische Darstellung des RingmeßfühlersFigure 1: schematic representation of the tongue sensor Figure 2: schematic representation of the ring sensor
Der Zungenmeßfühler 3 befindet sich im strömenden Medium 2.The tongue sensor 3 is located in the flowing medium 2.
Durch das Ausströmen neigt sich der elastische Fühler 3 in Strömungsrichtung.Due to the outflow, the elastic sensor 3 inclines in the direction of flow.
Der Dehnungsmeßstreifen befindet sich im bzw. auf der Oberfläche des Zungenmeßfühlers Er wird in dem Fall gestreckt oder gestaucht.The strain gauge is located in or on the surface of the tongue sensor. In this case it is stretched or compressed.
Der sich verändernde Zustand wird über ein elektronisches Anzeigegerät 4 in optische, akustische oder elektronische Signale umgewandelt. Mit dem Zungenmeßfühler kann auch die Strömungsrichtung bestimmt werden.The changing state is converted into optical, acoustic or electronic signals via an electronic display device 4. The tongue sensor can also be used to determine the flow direction.
Der Ringmeßfuhler 6 befindet sich außerhalb des strömenden Mediums 2 auf bzw. in der Wandung des Strömungskanals (Rohrleitung).The ring sensor 6 is located outside the flowing medium 2 on or in the wall of the flow channel (pipeline).
Durch die Strömungsgeschwindigkeit &ngr; entsteht im Strömungskanal (Rohrleitung) ein bestimmter Staudruck q.The flow velocity v creates a certain dynamic pressure q in the flow channel (pipe).
Dieser bewirkt, daß der Strömungskanal 5 geringfügig seinen Querschnitt und damit seinen Umfang verändert.This causes the flow channel 5 to slightly change its cross-section and thus its circumference.
Damit wird die Wandung 5 des Strömungskanals unterschiedlich gedehnt.This causes the wall 5 of the flow channel to be stretched differently.
Die mechanische Spannung und damit der Staudruck kann mittels Dehnungsmeßstreifen 6 und Anzeigegerät 7 gemessen werden.The mechanical stress and thus the dynamic pressure can be measured using strain gauges 6 and display device 7.
Um die Strömungsgeschwindigkeit bestimmen zu können, benötigt man eine Blende.In order to determine the flow velocity, an aperture is required.
Durch sie verändert sich der Staudruck.This causes the dynamic pressure to change.
Wie mit der Ringwaage kann jetzt der Differenzdruck vor und nach der Blende ermittelt werden. Bei entsprechender Eichung wird die Durchflußmenge angezeigt. Dazu benötigt man mindestens 2 Ringmeßfuhler und ein Anzeigegerät.As with the ring balance, the differential pressure before and after the orifice can now be determined. With appropriate calibration, the flow rate is displayed. This requires at least 2 ring sensors and a display device.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29806374U DE29806374U1 (en) | 1998-04-07 | 1998-04-07 | Flow meter with strain gauge sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29806374U DE29806374U1 (en) | 1998-04-07 | 1998-04-07 | Flow meter with strain gauge sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29806374U1 true DE29806374U1 (en) | 1998-07-16 |
Family
ID=8055449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29806374U Expired - Lifetime DE29806374U1 (en) | 1998-04-07 | 1998-04-07 | Flow meter with strain gauge sensor |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE29806374U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100324838A1 (en) * | 2006-10-04 | 2010-12-23 | Northwestern University | Sensing device with whisker elements |
| DE102022104513B3 (en) | 2022-02-25 | 2023-06-29 | Oventrop Gmbh & Co. Kg | Fitting for recording and influencing the volume flow |
-
1998
- 1998-04-07 DE DE29806374U patent/DE29806374U1/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100324838A1 (en) * | 2006-10-04 | 2010-12-23 | Northwestern University | Sensing device with whisker elements |
| US8448514B2 (en) * | 2006-10-04 | 2013-05-28 | Northwestern University | Sensing device with whisker elements |
| DE102022104513B3 (en) | 2022-02-25 | 2023-06-29 | Oventrop Gmbh & Co. Kg | Fitting for recording and influencing the volume flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19980827 |
|
| R156 | Lapse of ip right after 3 years |
Effective date: 20020201 |