DE2725559A1 - Strain gauge mounting arrangement - consists of holes drilled in body transverse to direction of applied force - Google Patents

Strain gauge mounting arrangement - consists of holes drilled in body transverse to direction of applied force

Info

Publication number
DE2725559A1
DE2725559A1 DE19772725559 DE2725559A DE2725559A1 DE 2725559 A1 DE2725559 A1 DE 2725559A1 DE 19772725559 DE19772725559 DE 19772725559 DE 2725559 A DE2725559 A DE 2725559A DE 2725559 A1 DE2725559 A1 DE 2725559A1
Authority
DE
Germany
Prior art keywords
force
holes
applied force
strain gauges
strain gauge
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Withdrawn
Application number
DE19772725559
Other languages
German (de)
Inventor
Erich Brosa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19772725559 priority Critical patent/DE2725559A1/en
Publication of DE2725559A1 publication Critical patent/DE2725559A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
    • G01L5/108—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a single support, e.g. a glider
    • 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
    • G01L1/2218—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction
    • 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
    • G01L1/2218—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction
    • G01L1/2225—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction the direction being perpendicular to the central axis
    • 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
    • G01L1/2231—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being disc- or ring-shaped, adapted for measuring a force along a single direction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measurement Of Force In General (AREA)

Abstract

A rectangular body (1) which is subjected to a force applied to one face has one or more holes (2) bored into it, transverse to the direction of the force, to a region of the body at which it is desired to measure strain. At this point strain gauges (3), whose extension serves to indicate the strain under the applied force, are mounted. The holes may extend right to the centre of the body, or, alternatively may penetrate only a short distance. This may, for example, be distributed along a support rod mounted in bearings to carry a cable pulley. The holes may be filled with plugs (4) which are intended to prevent the gauges being affected by moisture.

Description

KraftmeßsystemForce measuring system

Der Erfindung liegt die Aufgabe zugrunde Dehnungsmeßstreifen, kurz DMS genannt, soveit als möglich an die zentrale Zone der belasteten Querschnittes von Kraftaufnehmungen zu plazleren, so daß ungleichmäßige Belastungen der Endflächen genauers Messer mit venig Einsatz von DMS ermöglicht und die hierzu erforderlichen Ausnehmungen durch einfache Bohrungen hergestellt werden Abb. 1 zeigt einen zylindrischen Kraftaufnehmer 1 mit den Sacklöchern 2, den DMS 3 und den Stopfen 4 bei einseitiger Querschnitts-Belastung. 8 ist die Stauch-oder Schubmesswand.The invention is based on the problem of strain gauges, in short Called strain gauges, as far as possible in the central zone of the loaded cross-section of force absorption to place, so that uneven loads on the end faces more precisely knife with venig use of strain gauges enables and the necessary for this Recesses can be made by simple bores. Fig. 1 shows a cylindrical one Force transducer 1 with the blind holes 2, the strain gauges 3 and the plugs 4 for one-sided Cross-sectional load. 8 is the compression or shear measuring wall.

Abb. 2 zeigt beispielsweise einen Teil eines Kraftmeßringes 5 mit 4 Sacklöchern 2 (zwei dargestellt) zur Aufnahme der DMS 3 in der zentralen Zone 6, die bei überwiegender Innen- (Fi) oder Außenwandbelastung (Fa) der Ringfläche den Lastmittelwert aufnimmt. Eine zweiseitige Decklebung der Ringwandung 7 mit DMS erübrigt sich dadurch. Außerdem ergibt sich der große Vorteil einer zuverlässigen Abdichtung gegen äußere Feuchtigkeitseinflüsse auf die DMS 3 durch die passenden Vorschlußstopfen 4.Fig. 2 shows, for example, part of a force measuring ring 5 with 4 blind holes 2 (two shown) to accommodate the DMS 3 in the central zone 6, the case of predominant inner (Fi) or outer wall loading (Fa) of the ring surface records the mean load value. A double-sided covering of the ring wall 7 with strain gauges this is unnecessary. There is also the great advantage of a reliable one Sealing against external moisture influences on the DMS 3 through the appropriate Pre-sealing plug 4.

In Abb. 3 ist einc doppelseitige Bohrung 2 und 2' mit D5IS 3 in einem Teil eines Kraftmessringes dargestellt.In Fig. 3 there is a double-sided bore 2 and 2 'with D5IS 3 in one Part of a force washer shown.

In Abb. 4 ist eine durch die Platte 22 verschlossene Flachbohrung 9 in einer auf Verdrehung beanspruchten Welle 10 dargestellt, bei der diese Meßstelle direkt unter einem Lager 11 angeordnet ist. Das Messelement 12 ist ein DbIS ftir Schubspannungsmessungen.In Fig. 4 there is a flat bore closed by the plate 22 9 shown in a torsion stressed shaft 10, in which this measuring point is arranged directly under a bearing 11. The measuring element 12 is a DbIS for Shear stress measurements.

In Abb. 5 ist eine beiderseits gelagerte Welle 13 dargestellt, die zwischen den festen Lagerstellen 14 und 15 beispielsweise durch eine Seilrolle 16 belastet wird. Durch beiderseitige Bohrungen 17 (siehe auch Abb. 7) im Übergangsbereich 18, zwischen den Lagerstellen 14-15 und dem Belastungsbereich der Rolle 16 ergibt sich die Möglichkeit mittels Schubspannungs-DMS 19 die auftretende Schubspannung quer zur Achse zu messen.In Fig. 5, a shaft 13 mounted on both sides is shown, the between the fixed bearing points 14 and 15, for example by means of a pulley 16 is charged. Through holes 17 on both sides (see also Fig. 7) in the transition area 18 between the bearings 14-15 and the load area of the Roll 16 results in the possibility of the occurring by means of shear stress strain gauges 19 Measure shear stress across the axis.

Abb. 6 stellt diesen Zustand der stehenden Welle im Belastungsfalle dar.Fig. 6 shows this state of the standing wave in the load case represent.

In Abb. 7 ist der Schnitt AB dargestellt, mit den Bohrungen 7, der Schubmesswand 20 mit den DMS 19.In Fig. 7, the section AB is shown, with the holes 7, the Shear wall 20 with the strain gauges 19.

Die in den Behrungen 17 mit Spiel, entsprechend dem erforderlichen Messweg angeordneten Füllkörper 21 bilden eine Sicherung, die bei mehrfacher Überlastung der Welle in Funktion tritt.Those in the bores 17 with play, according to the required Filling bodies 21 arranged in the measuring path form a fuse in the event of multiple overloads the shaft comes into operation.

Auf die Leitungsführung ist der einfachen Darstellung wegen in allen Darstellungen verzichtet werden.For the sake of simplicity, the wiring is in all of them Representations are dispensed with.

L e e r s e i t eL e r s e i t e

Claims (1)

Patentanpsrüche Kraftmeßsystem dadurch gekennzeichnet, daß quer zur Belastungsrichtung eines für Kraftmessungen geeigneten Körpers ein-oder beiderseitige Bohrungen bis annähernd zur Mitte des belasteten Querschnittes mit je einer ebenen Grundfläche angebracht sind, auf der sich DMS für achsiale Kraft-oder quer zur Achse verlaufende Schubkraftmessungen ausführen lassen.Patent claims force measuring system characterized in that transversely to Direction of loading of a body suitable for force measurements on one or both sides Boreholes almost to the middle of the loaded cross-section, each with one level Base area are attached on which strain gauges for axial force or transversely to the axis have running thrust measurements carried out. Kraftmeßsystem nach Anspruch 1 dadurch gekennzeichnet, daß die zur Aufnahme der DMS angebrachten Bohrungen mit passenden Füllstücken versehen sind, die den entsprechenden Teil der Belastung mittrangen.Force measuring system according to claim 1, characterized in that the for The holes made for the strain gauges are provided with suitable filler pieces, who carried the corresponding part of the load. Kraftmeßsystem nach Anspruch 1-2, dadurch gekennzeichnet, daß die Füllstücke nur Abdeck-bzw. Schutzfunktionen zu erfüllen haben.Force measuring system according to claims 1-2, characterized in that the Filler pieces only cover or. Have to fulfill protective functions.
DE19772725559 1977-06-07 1977-06-07 Strain gauge mounting arrangement - consists of holes drilled in body transverse to direction of applied force Withdrawn DE2725559A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772725559 DE2725559A1 (en) 1977-06-07 1977-06-07 Strain gauge mounting arrangement - consists of holes drilled in body transverse to direction of applied force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772725559 DE2725559A1 (en) 1977-06-07 1977-06-07 Strain gauge mounting arrangement - consists of holes drilled in body transverse to direction of applied force

Publications (1)

Publication Number Publication Date
DE2725559A1 true DE2725559A1 (en) 1978-12-21

Family

ID=6010890

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772725559 Withdrawn DE2725559A1 (en) 1977-06-07 1977-06-07 Strain gauge mounting arrangement - consists of holes drilled in body transverse to direction of applied force

Country Status (1)

Country Link
DE (1) DE2725559A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105564A1 (en) * 1982-10-02 1984-04-18 Philips Patentverwaltung GmbH Force transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105564A1 (en) * 1982-10-02 1984-04-18 Philips Patentverwaltung GmbH Force transducer

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