DE2349281A1 - Weight holding fixture - has tension rod reinforced at ends, with strain gauge strips on sides - Google Patents
Weight holding fixture - has tension rod reinforced at ends, with strain gauge strips on sidesInfo
- Publication number
- DE2349281A1 DE2349281A1 DE19732349281 DE2349281A DE2349281A1 DE 2349281 A1 DE2349281 A1 DE 2349281A1 DE 19732349281 DE19732349281 DE 19732349281 DE 2349281 A DE2349281 A DE 2349281A DE 2349281 A1 DE2349281 A1 DE 2349281A1
- Authority
- DE
- Germany
- Prior art keywords
- wires
- measuring
- sensor according
- weight sensor
- rods
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1402—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
- G01G3/1404—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports combined with means to connect the strain gauges on electrical bridges
Abstract
Description
Es ist "bekannt, mit dehnungsempfindlichen elektrischen Aufnehmern versehene Metallstäbe, oder auch nur einfache Widerstandsdrähte für empfindliche Waagen zu nutzen, indem man sie in Zugrichtung belastet (Abt. 1).It is "known to use strain-sensitive electrical sensors metal rods or even simple resistance wires for sensitive scales by loading them in the direction of pull (Dept. 1).
!Derartige Meßeinrichtungen, insbesondere für niedrige Meßbereiche, sind auch mechanisch empfindlich und sollten als austauschbarer Baustein möglichst in sogenannter Dosenform (Abb. 2) vorliegen und von oben belastbar sein, da sie meistens unterhalb einer Wiegeplattform oder eines Transportbandes einzubauen sind. Auch sollten die eigentlichen Wandlerelemente (Abb. 5 bis 7) leicht ersetzbar sein.! Such measuring devices, especially for low measuring ranges, are also mechanically sensitive and should be available as an exchangeable component in a so-called can form (Fig. 2) and from be resilient at the top, as they are usually below a weighing platform or a conveyor belt. The actual transducer elements (Fig. 5 to 7) should also be easily replaceable.
Vorliegende Erfindung erfüllt diese Forderung in einfacher Konstruktion und mit leicht zu handhabenden Austauschelementen. Als Wandlerelement wird ein, mit beiderseitigen Endverstärkungen 1 versehener Stab 2 verwendet (Abb. 5)> der mit Dehnungsmeßstreifen 3» kurz SMS genannt, ein» oder beiderseitig beklebt ist und in den Verstärkungsteilen 1 geeignete Aufhängevorrichtungen, z. B. Ösen 18 oder Stifte aufweist, welche zum bequemen Einhängen in den Dosenkörper 4 oder 4* dienen und außerdem die Forderung erfüllen, daß der Stab über seinen ganzen Querschnitt gleichmäßig, sich selbst einstellend, auf Zug beansprucht wird» was bei einem festen Einspannen des Stabes in Klemmbacken oder dergleichen nur schwer erreichbar ist.The present invention fulfills this need in a simple construction and with easy-to-use exchange elements. A transducer element with end reinforcements 1 on both sides is used Rod 2 used (Fig. 5)> the one with strain gauge 3 »SMS for short called, one »or both sides is glued and in the reinforcement parts 1 suitable suspension devices, z. B. eyelets 18 or pins has, which for easy hanging in the can body 4 or 4 * serve and also meet the requirement that the staff be above his entire cross-section evenly, self-adjusting, subjected to tensile stress becomes »what when the rod is firmly clamped in the jaws or the like is difficult to achieve.
TJm den Stab 2 oberhalb seiner Einbaulage in einer geschlossenen Dose (Abb. 2) auf Zug belasten zu können, ist eine Kraftumlenkeinrichtung 5 erforderlich, die durch Parallelführungen 6 zentriert ist. Beschädigungen durch Überlastung oder Belastung in falscher Richtung werden durch einstellbare Anschläge 8, z. B. in Form von Schrauben, aufgenommen. TJm the rod 2 above its installation position in a closed box (Fig. 2) to be able to load on train, a force deflection device 5 is required, which is centered by parallel guides 6. Damage due to overload or loading in the wrong direction adjustable stops 8, e.g. B. in the form of screws added.
Eine Anordnung nach Abb. 3 ergibt die Möglichkeit, zwei unter Vorspannung liegende Meßstäbe wechselseitig zu be- bzw. entlasten, so, daß sich mittels 4 DMS 3 oder Meßdrähten 9 (Abb. 6 u. 7) eine vollaktiveAn arrangement according to Fig. 3 gives the possibility of two under bias to alternately load or unload lying measuring rods, so that a fully active
5098U/0 6385098U / 0638
Blatt - 2 -Page 2 -
BrüokenaohaltXing (Abb. θ) gebildet wird, wobei sich außerdem noch eine erwünscht niedrige Bauhöhe der Meßdose 41 ergibt.BrüokenaohaltXing (Fig. Θ) is formed, which also results in a desired low overall height of the load cell 4 1 .
An Stelle eines mit SMS versehenen Metallstabes 2 können auch auf Isolierkörpern 10 und mit Aufnahmeösen 18 versehene Widerstandsdrähte 9 verwendet werden.Instead of a metal rod 2 provided with SMS, resistance wires provided with mounting eyelets 18 can also be placed on insulating bodies 10 9 can be used.
Das, der Einfachheit dargestellte, Materialgelenk 11, kann auch durch ein nicht dargestelltes Schneidenlager oder ein Kreuzfedergelenk 12 ersetzt werden (Abb. 4)·The material hinge 11 shown for simplicity can also be through a knife-edge bearing (not shown) or a cross-spring joint 12 replaced (Fig. 4)
Sie Aufnahme zapfen 15 für die Ösen 18 haben ringförmige Kerben und wirken zusammen wie Schneidenlager, reibungsfrei. Der einseitige Winkelhebel 14 ist mit dem Teil 5 (Abb. 3) über ein Kopplungsteil 16 verbunden, ebenfalls mit Sohneidenlagerung.You receiving pin 15 for the eyelets 18 have annular notches and work together like blade bearings, frictionless. The one-sided angle lever 14 is connected to part 5 (Fig. 3) via a coupling part 16, also with sons storage.
Die Spanneinrichtung 17 ermöglicht die Meßstäbe 2 oder Widerstandsdrähte 9 vorzuspannen. The clamping device 17 enables the measuring rods 2 or resistance wires 9 to be prestressed.
509814/0638509814/0638
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732349281 DE2349281A1 (en) | 1973-10-01 | 1973-10-01 | Weight holding fixture - has tension rod reinforced at ends, with strain gauge strips on sides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732349281 DE2349281A1 (en) | 1973-10-01 | 1973-10-01 | Weight holding fixture - has tension rod reinforced at ends, with strain gauge strips on sides |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2349281A1 true DE2349281A1 (en) | 1975-04-03 |
Family
ID=5894238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19732349281 Pending DE2349281A1 (en) | 1973-10-01 | 1973-10-01 | Weight holding fixture - has tension rod reinforced at ends, with strain gauge strips on sides |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2349281A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000136A1 (en) * | 1977-08-05 | 1979-03-22 | B Loetscher | Scales |
US4451817A (en) * | 1982-03-25 | 1984-05-29 | Mettler Instrumente Ag | Dynamometer transducer utilizing an amorphous metal |
-
1973
- 1973-10-01 DE DE19732349281 patent/DE2349281A1/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000136A1 (en) * | 1977-08-05 | 1979-03-22 | B Loetscher | Scales |
DE2857478A1 (en) * | 1977-08-05 | 1980-07-17 | Bernhard Loetscher | LIBRA |
US4451817A (en) * | 1982-03-25 | 1984-05-29 | Mettler Instrumente Ag | Dynamometer transducer utilizing an amorphous metal |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OHN | Withdrawal |