DE102011009684A1 - Partially exchangeable support system for strain gauge for long-term controlling and/or monitoring machine, has assembly support connected with component surface with adhesive bond to transfer component strain/compression to gauge support - Google Patents
Partially exchangeable support system for strain gauge for long-term controlling and/or monitoring machine, has assembly support connected with component surface with adhesive bond to transfer component strain/compression to gauge support Download PDFInfo
- Publication number
- DE102011009684A1 DE102011009684A1 DE201110009684 DE102011009684A DE102011009684A1 DE 102011009684 A1 DE102011009684 A1 DE 102011009684A1 DE 201110009684 DE201110009684 DE 201110009684 DE 102011009684 A DE102011009684 A DE 102011009684A DE 102011009684 A1 DE102011009684 A1 DE 102011009684A1
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- DE
- Germany
- Prior art keywords
- carrier
- strain
- support
- component
- dms
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Stand der Technik:State of the art:
Dehnungsmessstreifen (DMS), bestehend aus einer Folie und einem el. Widerstand, werden ihrer Bezeichnung entsprechend verwendet, um Dehnungen in Bauteilen zu messen.Strain gages (DMS), consisting of a foil and an el. Resistor, are used according to their designation to measure strains in components.
Dabei wird der physikalische Effekt genutzt, dass ein el. Leiter seinen Widerstand steigert, wenn er gelängt wird und dabei seinen Querschnitt verringert. Sowohl die größere Länge als auch der geringere Querschnitt erhöhen den el. Widerstand. Wird der el. Leiter gestaucht und verdickt sich dabei, nimmt der Widerstand des el. Leiters ab. Der Vorgang ist nahezu linear.The physical effect is used that an el. Conductor increases its resistance when it is elongated while reducing its cross-section. Both the longer length and the smaller cross section increase the el. Resistance. If the el. Conductor is compressed and thickened, the resistance of the el. Conductor decreases. The process is almost linear.
Um den Effekt nutzbar zu machen, werden sehr dünne el. Leiter auf nicht leitende Folien aufgebracht. Die Folie zusammen mit dem el. Widerstand wird als DMS bezeichnet. Die DMS werden in der Regel auf die Bauteiloberfläche (
Die Dehnung der Bauteiloberfläche wird um so besser erfasst, je geringer der Abstand der el. Leiter von der Bauteiloberfläche ist.The elongation of the component surface is better detected, the smaller the distance of the el. Conductor from the component surface.
Durch unterschiedliche Anordnung der DMS auf der Bauteiloberfläche und Verschaltung in der Wheatstoneschen Messbrücke können unterschiedliche Größen gemessen werden, wie Biegemoment, Längskraft, Drehmoment u. a. Mit gleicher Anordnung der DMS auf dem Bauteil kann durch unterschiedliche Verschaltung in der Wheatstoneschen Messbrücke z. B. das reine Biegemoment oder die reine Längskraft gemessen werden.By different arrangement of the strain gages on the component surface and interconnection in the Wheatstone bridge different sizes can be measured, such as bending moment, longitudinal force, torque u. a. With the same arrangement of the strain gages on the component can be achieved by different interconnection in the Wheatstone bridge z. B. the pure bending moment or the pure longitudinal force can be measured.
DMS haben mehrere Jahrzehnte Tradition und sind weit verbreitet.DMS have several decades of tradition and are widely used.
Die DMS zu kleben und zu verkabeln bedarf Sachkenntnis und Sorgfalt. An die Umgebungsbedingungen bei der Installation der DMS sind Anforderungen zu stellen.Bonding and wiring the strain gauges requires expertise and care. Requirements must be set for the environmental conditions during the installation of the strain gages.
Schlagworte sind gut vorbereitete Oberfläche, staubfrei, trocken, fettfrei und warm, eben alles was gutes Kleben erst möglich macht.Keywords are well-prepared surface, dust-free, dry, fat-free and warm, just everything that makes good bonding possible.
DMS werden für spezielle Anwendungen, um sie leichter montierbar zu machen, auf oder in DMS-Träger (
Zu kaufen sind auch Folien, in die die DMS eingeschlossen und zur Vollbrücke verschaltet sind (Schutzklasse IP66). Die Folien werden auf die Bauteiloberfläche geklebt und benötigen keinen weiteren Schutz der DMS gegen Umwelteinflüsse. Beide Anwendungen machen es möglich, die DMS-Sensoren in ”rauerer” Umgebung zu montieren.Films are also available in which the strain gauges are enclosed and interconnected to the full bridge (protection class IP66). The films are glued to the component surface and do not require any further protection of the strain gages against environmental influences. Both applications make it possible to mount strain gage sensors in a "harsher" environment.
Ziel der Erfindung:Object of the invention:
DMS haftet nicht ganz unberechtigt der Ruf an, dass sie eine begrenzte Lebensdauer haben. Auch ist es denkbar, dass selbst gekapselte DMS durch äußere Einwirkungen zerstört werden.DMS has no unwarranted reputation for having a limited life. It is also conceivable that self-enclosed strain gauges are destroyed by external influences.
Werden DMS zur dauerhaften Steuerung und/oder Überwachung von Maschinen genutzt, ist es wünschenswert, defekte DMS leicht und schnell tauschen zu können und dies auch unter Bedingungen, unter denen DMS nicht mehr neu geklebt werden können. Auch sollen nicht nur DMS-Spezialisten in der Lage sein, die DMS zu tauschen.If DMS are used for permanent control and / or monitoring of machines, it is desirable to exchange defective DMS easily and quickly, even under conditions under which strain gages can no longer be re-glued. Also, not only DMS specialists should be able to swap the DMS.
Die erwähnten schraubbaren DMS-Träger (
Die Erstmontage der schraubbaren DMS-Träger (
Beschreibung der Erfindung:Description of the invention:
Aufbauend auf bekannten DMS-Trägern (
Daraus, dass der mit der Bauteiloberfläche (
In der Regel ist es einfacher, eine Umgebung zu schaffen, in der der Montage-Träger (
Mögliche Anwendungen sind DMS-Sensoren im Blattwurzelbereich von Rotorblättern von Windenergieanlagen, DMS im Turmfuß von Windenergieanlagen, DMS auf Maschinenständern großer Walzwerke, DMS auf Oberflächen, die nicht angebohrt werden dürfen und viele andere.Possible applications include blade root strain gauges for wind turbine rotor blades, wind turbine strain gauges for wind turbines, strain gages on machine stands of large rolling mills, strain gauges on non-drilled surfaces, and many others.
Eine konsequente Weiterentwicklung ist es, die bekannten DMS-Trägerplatten (
Ausführungen, in der die DMS-Träger (
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- DMS-TrägerDMS-carrier
- 22
- Montage-TrägerMounting substrate
- 33
- Bauteil bzw. BauteiloberflächeComponent or component surface
- 44
- nicht lösbare Verbindungnon-detachable connection
- 55
- WärmeleitmittelThermal interface
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110009684 DE102011009684B4 (en) | 2011-01-28 | 2011-01-28 | Partially exchangeable carrier system for strain gauges |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110009684 DE102011009684B4 (en) | 2011-01-28 | 2011-01-28 | Partially exchangeable carrier system for strain gauges |
Publications (2)
Publication Number | Publication Date |
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DE102011009684A1 true DE102011009684A1 (en) | 2012-08-02 |
DE102011009684B4 DE102011009684B4 (en) | 2013-05-29 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE201110009684 Active DE102011009684B4 (en) | 2011-01-28 | 2011-01-28 | Partially exchangeable carrier system for strain gauges |
Country Status (1)
Country | Link |
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DE (1) | DE102011009684B4 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2351810A1 (en) * | 1973-10-16 | 1975-04-24 | Philips Patentverwaltung | EXTENSION TRANSDUCER |
US20050145044A1 (en) * | 2004-01-06 | 2005-07-07 | Dublin Wilbur L.Jr. | Six degrees of freedom mirrored cantilever extensometer |
-
2011
- 2011-01-28 DE DE201110009684 patent/DE102011009684B4/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2351810A1 (en) * | 1973-10-16 | 1975-04-24 | Philips Patentverwaltung | EXTENSION TRANSDUCER |
US20050145044A1 (en) * | 2004-01-06 | 2005-07-07 | Dublin Wilbur L.Jr. | Six degrees of freedom mirrored cantilever extensometer |
Also Published As
Publication number | Publication date |
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DE102011009684B4 (en) | 2013-05-29 |
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R163 | Identified publications notified | ||
R012 | Request for examination validly filed | ||
R016 | Response to examination communication | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |
Effective date: 20130830 |