DE2901995A1 - Machine component expansion monitor - using welded measuring plate incorporating measuring elements and perpendicular slits - Google Patents
Machine component expansion monitor - using welded measuring plate incorporating measuring elements and perpendicular slitsInfo
- Publication number
- DE2901995A1 DE2901995A1 DE19792901995 DE2901995A DE2901995A1 DE 2901995 A1 DE2901995 A1 DE 2901995A1 DE 19792901995 DE19792901995 DE 19792901995 DE 2901995 A DE2901995 A DE 2901995A DE 2901995 A1 DE2901995 A1 DE 2901995A1
- Authority
- DE
- Germany
- Prior art keywords
- plate
- extensometer
- welding according
- welded
- measuring
- 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.)
- Withdrawn
Links
Classifications
-
- 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
Abstract
Description
Dehnungsmesser zum Anschweißen Extensometer for welding
Vorliegende Erfindung hat den Zweck einen mechanisch unempfindlichen Dehnungsmesser zu bilden, der durch einfaches Anschweißen am Maschinenbauteil sicher gehalten wird und witterungsunempfindlich ist.The present invention has the purpose of being mechanically insensitive Form strain gauges that are safe by simply welding them to the machine component is held and is insensitive to the weather.
Es ist bekannt an Maschinenbauteilen Dehnungsmeßelemente anzuschweißen, hauptsächlich dann, wenn die Bauteile hohen Temperaturen ausgesetzt sind und die Klebestellen dadurch zerstört werden. Labormäßig ist das kein Problem, auch, wenn wegen der mechanischen Empfindlichkeit der Dehnmeßstreifen ein großer Aufwand erforderlich ist.It is known to weld strain gauges to machine components, mainly when the components are exposed to high temperatures and the This destroys glue points. In laboratory terms, that's not a problem, even if because of the mechanical sensitivity of the strain gauges, a great deal of effort is required is.
Ein Dehnungsmesser, der zur Betriebskontrolle von Maschinen oder als Sicherheitselement und überlastschutz eingesetzt ist, muß aber robust und einfach zu handhaben sein, Abb. 1.A strain gauge that is used to control the operation of machines or as a Safety element and overload protection is used, but must be robust and simple to be handled, Fig. 1.
Dieser Dehnungsmesser besteht aus einer ebenen Platte 1, die an einer Seite oder auf beiden Seiten eingefräste Nuten 2-3 hat, so daß eine verhältnismäßig dünne Wandung 4 entsteht, die mit Schubspannungsmeßelementen 5 und 6 ein-oder beiderseitig beklebt ist.This strain gauge consists of a flat plate 1, which is attached to a Side or on both sides has milled grooves 2-3, so that one relatively thin wall 4 arises, with shear stress measuring elements 5 and 6 on one or both sides is pasted.
Zwei diagonal gegenüberliegende Einschnitte vom Typ 7 oder Typ 8 machen die Vorrichtung in der Längsrichtung elastisch. Bei Verschiebung der Seite A gegen B entstehen in der Wand 4 Schubspannungen, die mit dem Bauteil 9, an dem der Dehnungsmesser befestigt ist, proportional verlaufen und um so größer sind, je größer der Abstand C der Schweißraupen 1o-1o' und 11-11' voneinander ist, Abb. 2.Make two diagonally opposite incisions of type 7 or type 8 the device is elastic in the longitudinal direction. When shifting side A against B arise in the wall 4 shear stresses, which with the component 9, on which the strain gauge is attached, run proportionally and the greater, the greater the distance C of the weld beads is 1o-1o 'and 11-11' from each other, Fig. 2.
Durch Versetzen der Schweißraupen zueinander, kann also die Meßempfindlichkeit den meist gering beanspruchten Bauteilen angepaßt werden.By offsetting the welding beads to one another, the measurement sensitivity can be adapted to the components that are usually less stressed.
Um ein Ausbiegen der Platte 1 in der Ebene zu verhindern, können statt der zwei einfachen Schlitze 7 zwei diagonal angeordnete biegsame Materialgelenke 12 wie bei Abb. 2 dargestellt, angewendet werden.In order to prevent the plate 1 from bending in the plane, can take place of the two simple slots 7 are two diagonally arranged flexible material joints 12 as shown in Fig. 2 can be used.
Da der Dehnungsmesser auf beiden Seiten mit Schubspannungselementen 5 und 6 beklebt werden kann, kann der Dehnungsmesser zwei komplette, voneinander unabhängige Meßbrücken mit je einem unabhängigen Verstärker 13-14 enthalten, was z.B. bei Sicherheitseinrichtungen von Vorteil ist, Abb. 1.Because the extensometer has shear stress elements on both sides 5 and 6 can be pasted, the extensometer can be two complete, from each other independent measuring bridges each with an independent amplifier 13-14 contain what e.g. for safety devices, Fig. 1.
Für die Kabeldurchführung 15 und zum Schutz gegen Feuchtigkeit ist ein biegeweiches Gehäuse 16 angeschweißt, das auch zur Aufnahme der zwei Verstärker 13-14, sowie einem Trockenmittel 17 vorgesehen ist.For the cable entry 15 and for protection against moisture a pliable housing 16 welded on, which also holds the two amplifiers 13-14, as well as a desiccant 17 is provided.
Die Bohrungen 18 in der Platte 1 dienen zur Befestigung mittels Schrauben, die nach dem Anschweißen herausgenommen werden können. Diese Bohrungen 18 können auch Gewinde enthalten zur Befestigung einer Schutzkappe 19. In der Platte können auch Haftmagnete 20 eingelassen sein, die ein Anbohren des zu überwachenden Maschinenbauteiles vor dem Schweißen erübrigen.The holes 18 in the plate 1 are used for fastening by means of screws, which can be removed after welding. These holes 18 can also contain threads for attaching a protective cap 19. In the plate can Magnets 20 can also be embedded, which allow drilling of the machine component to be monitored not necessary before welding.
Die Schubempfindlichkeit der Wand 4 kann durch die Bohrungen 21-22 wesentlich vergrößert werden.The sensitivity to thrust of the wall 4 can through the bores 21-22 can be increased significantly.
Für das Nachtrimmen der Brückenverstimmung, z.B. infolge einer Vorlast des Bauteiles, ist das Gehäuse 16 durch den abnehmbaren dichten Verschluß 24 zu öffnen und die entsprechenden Verstärkerorgane sind zugänglich.For re-trimming the bridge misalignment, e.g. as a result of a preload of the component, the housing 16 is closed by the removable sealed closure 24 open and the corresponding amplifier organs are accessible.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792901995 DE2901995A1 (en) | 1979-01-19 | 1979-01-19 | Machine component expansion monitor - using welded measuring plate incorporating measuring elements and perpendicular slits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792901995 DE2901995A1 (en) | 1979-01-19 | 1979-01-19 | Machine component expansion monitor - using welded measuring plate incorporating measuring elements and perpendicular slits |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2901995A1 true DE2901995A1 (en) | 1980-07-31 |
Family
ID=6060930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19792901995 Withdrawn DE2901995A1 (en) | 1979-01-19 | 1979-01-19 | Machine component expansion monitor - using welded measuring plate incorporating measuring elements and perpendicular slits |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2901995A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3111865A1 (en) * | 1981-03-26 | 1982-10-14 | Mess- und Wiegetechnik GmbH & Co KG, 3015 Wennigsen | Device for load determination in the form of a crane weigher or a dynamometer |
DE4206577A1 (en) * | 1992-03-02 | 1993-09-09 | Hottinger Messtechnik Baldwin | Deformation measuring device for monitoring bridge supports, machine stands etc. - has coupling elements positively interlocked with surface of monitored part, e.g. via corrugations |
WO1996006323A1 (en) * | 1994-08-22 | 1996-02-29 | Scan-Sense A/S | Device for measuring mechanical tension, extension and bending |
WO1997010486A1 (en) * | 1995-09-15 | 1997-03-20 | Koivisto, Marja-Liisa | Sensing element for measuring loads |
-
1979
- 1979-01-19 DE DE19792901995 patent/DE2901995A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3111865A1 (en) * | 1981-03-26 | 1982-10-14 | Mess- und Wiegetechnik GmbH & Co KG, 3015 Wennigsen | Device for load determination in the form of a crane weigher or a dynamometer |
DE4206577A1 (en) * | 1992-03-02 | 1993-09-09 | Hottinger Messtechnik Baldwin | Deformation measuring device for monitoring bridge supports, machine stands etc. - has coupling elements positively interlocked with surface of monitored part, e.g. via corrugations |
WO1996006323A1 (en) * | 1994-08-22 | 1996-02-29 | Scan-Sense A/S | Device for measuring mechanical tension, extension and bending |
WO1997010486A1 (en) * | 1995-09-15 | 1997-03-20 | Koivisto, Marja-Liisa | Sensing element for measuring loads |
US6082203A (en) * | 1995-09-15 | 2000-07-04 | Marja-Liisa Koivisto | Sensing element for measuring loads |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8141 | Disposal/no request for examination |