DE2856607B1 - Force transducer for measuring forces acting on a test body - Google Patents
Force transducer for measuring forces acting on a test bodyInfo
- Publication number
- DE2856607B1 DE2856607B1 DE19782856607 DE2856607A DE2856607B1 DE 2856607 B1 DE2856607 B1 DE 2856607B1 DE 19782856607 DE19782856607 DE 19782856607 DE 2856607 A DE2856607 A DE 2856607A DE 2856607 B1 DE2856607 B1 DE 2856607B1
- Authority
- DE
- Germany
- Prior art keywords
- spring body
- force transducer
- recess
- strain gauges
- force
- 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.)
- Granted
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
- G01L5/101—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 using sensors inserted into the flexible member
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measurement Of Force In General (AREA)
Description
Eine fertigungsmäßige einfache Ausgestaltung der Erfindung besteht darin, daß die Aussparung als Längsschlitz und die Querschnittserweiterungen als sich an den Längsschlitz anschließende Rundbohrungen mit größeren Durchmessern ausgebildet sind. There is a simple embodiment of the invention in terms of manufacture in that the recess as a longitudinal slot and the cross-sectional enlargements as themselves formed on the longitudinal slot adjoining round bores with larger diameters are.
Von Vorteil ist es, wenn der Federkörper mit einem Schutzrohr versehen ist, in dem die Steckdose für die Dehnungsmeßstreifen angeordnet ist. It is advantageous if the spring body is provided with a protective tube is, in which the socket for the strain gauges is arranged.
Durch diese Maßnahme ist der Kraftaufnehmer hinreichend gegen Beschädigungen und gegen Verschmutzung geschützt, wobei die gleichzeitige Aufnahme der Steckdose eine fertigungstechnisch einfache Lösung darstellt. With this measure, the force transducer is adequately protected against damage and protected against pollution, with the simultaneous inclusion of the socket represents a simple solution in terms of manufacturing technology.
Eine einfache Verbindung mit dem zu prüfenden Körper ist gegeben, wenn die Anschlußstutzen mit Innengewindebohrungen versehen sind. There is a simple connection with the body to be tested, if the connecting pieces are provided with internally threaded holes.
Nachfolgend ist ein Ausführungsbeispiel der Erfindung an Hand der Zeichnung beschrieben. Es zeigt Fig. 1 Längsschnitt durch einen solchen Kraftaufnehmer nach der Linie I-I der Fig. 2, Fig. 2 Schnitt nach der Linie II-II der Fig. 1, Fig. 3 Biegemomentenverlauf über dem Kraftaufnehmer, Fig. 4 Längsschnitt (ausschnittsweise) durch einen Federkörper anderer Ausbildung. The following is an embodiment of the invention on the basis of Drawing described. 1 shows a longitudinal section through such a force transducer along the line I-I of FIG. 2, FIG. 2, section along the line II-II of FIG. 1, FIG. 3 Bending moment curve over the force transducer, Fig. 4 Longitudinal section (partial) by a spring body of a different design.
Der Kraftaufnehr.ler weist einen Federkörper 1 auf, der in einem Schutzrohr 2 angeordnet ist. Zwei Anschlußstutzen 3 und 4, die mit Innengewindebohrungen 5 und 6 versehen sind, an dem Federkörper 1 dienen zur Verbindung mit dem - gestrichelt dargestellten - Prüfkörper 7. The Kraftaufnehr.ler has a spring body 1 in a Protective tube 2 is arranged. Two connecting pieces 3 and 4, the ones with internally threaded holes 5 and 6 are provided on the spring body 1 are used to connect to the - dashed lines shown - test specimen 7.
Der Federkörper 1 weist im Bereich der Längsachse eine durchgehende symmetrische Aussparung als Längsschlitz 8 auf, an dessen Enden sich Bohrungen 9 und 10 anschließen. Die verbleibenden Längsstege 12 und 13 des Federkörpers 1 dienen dabei zur Messung. The spring body 1 has a continuous one in the area of the longitudinal axis symmetrical recess as a longitudinal slot 8, at the ends of which holes 9 and 10 connect. The remaining longitudinal webs 12 and 13 of the spring body 1 are used along with the measurement.
Jeweils paarweise an einer Wand des Längsschlitzes 8 und an der dazugehörigen Seite an der Außenwand des Federkörpers 1 bzw. an den Stegen 12 und 13 sind Dehnungsmeßstreifen 11 angeordnet. Aufgrund des konstanten Biegemomentenverlaufes in dem Federkörper, wie aus Fig. 3 ersichtlich, können die Dehnungsmeßstreifen, wie angegeben, an beliebiger Stelle der Längsstege 12 und 13 (mit Ausnahme des Übergangsbereiches von dem Längsschlitz 8 zu der Bohrung 9 oder 10) angeordnet sein. Notwendig sind jedoch nur jeweils zwei sich spiegelbildlich gegenüberliegende Paare von Dehnungsmeßstreifen, z. B. die vier auf der Querachse liegenden Dehnungsmeßstreifen. Die Dehnungsmeßstreifen sind in bekannter Weise mit einigen Korrektur- und Abgleichelementen zu einer Wheatstone-Brücke zusammengeschaltet. Durch die gewählte paarweise Anordnung der Dehnungsmeßstreifen und der Verschaltung zu einer Wheatstone-Brücke wurden äußere Einwirkungen, insbesondere Temperaturänderungen sowie ungleich Belastung der beiden Schenkel, hervorgerufen durch ein der Zug-/Druckkraft überlagertes, äußeres unerwünschtes Biegemoment, kompensiert und haben somit keinen Einfluß auf die Meßspannung. In each case in pairs on one wall of the longitudinal slot 8 and on the associated one The side on the outer wall of the spring body 1 or on the webs 12 and 13 are strain gauges 11 arranged. Due to the constant bending moment curve in the spring body, As can be seen from Fig. 3, the strain gauges, as indicated, can be attached to any Location of the longitudinal webs 12 and 13 (with the exception of the transition area from the longitudinal slot 8 to the bore 9 or 10). However, only two are required at a time opposite pairs of strain gauges, e.g. B. the four strain gauges lying on the transverse axis. The strain gauges are in a known way with some correction and adjustment elements to a Wheatstone bridge interconnected. Due to the chosen arrangement of the strain gauges in pairs and the interconnection to a Wheatstone bridge were external influences, in particular Temperature changes as well as unequal loading of the two legs compensated by an external, undesired bending moment superimposed on the tensile / compressive force and therefore have no influence on the measuring voltage.
Dehnungsmeßstreifen sind passive Geber. So bedürfen die Kraftaufnehmer einer geeigneten Stromversorgung. In der Wahl der Stromart hesteht jedoch keine Einschränkung. Die Stromversorgung sowie das Abgreifen der Meßspannung wird über eine in dem Schutzrohr 2 angeordnete Steckdose 14 erreicht. Strain gauges are passive sensors. So need the force transducers a suitable power supply. However, there is no choice of current type Restriction. The power supply as well as the tapping of the measuring voltage is via a socket 14 arranged in the protective tube 2 is reached.
Wie aus der strichlierten Linie in der Fig. 3 ersichtlich, erfolgt die Verformung des Federkörpers im wesentlichen quer zur Kraftrichtung. Dadurch tritt nur eine sehr geringe Längenänderung auf. As can be seen from the dashed line in FIG. 3, takes place the deformation of the spring body essentially transversely to the direction of force. Through this only a very small change in length occurs.
InderFig. 4 ist ausschnittsweise ein Federkörper 1 dargestellt, der statt der runden Bohrungen 9 bzw. 10, die einfacher herzustellen sind, mit rechteckigen Ausnehmungen 9' bzw. 10' (nicht dargestellt) versehen sind. Durch diese Ausbildung wird ein vollständig gleichmäßiger Biegemomentenverlauf erreicht. IndianFig. 4 shows a section of a spring body 1, the instead of the round holes 9 and 10, which are easier to manufacture, with rectangular ones Recesses 9 'and 10' (not shown) are provided. Through this training a completely uniform bending moment curve is achieved.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782856607 DE2856607C2 (en) | 1978-12-29 | 1978-12-29 | Force transducer for measuring forces acting on a test body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782856607 DE2856607C2 (en) | 1978-12-29 | 1978-12-29 | Force transducer for measuring forces acting on a test body |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2856607B1 true DE2856607B1 (en) | 1980-07-03 |
DE2856607C2 DE2856607C2 (en) | 1981-04-16 |
Family
ID=6058630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782856607 Expired DE2856607C2 (en) | 1978-12-29 | 1978-12-29 | Force transducer for measuring forces acting on a test body |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2856607C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0153121A2 (en) * | 1984-02-13 | 1985-08-28 | Mettler-Toledo, Inc. | Compensated load cell |
DE102008010281A1 (en) * | 2008-02-21 | 2009-09-03 | Sartorius Ag | sensor device |
CN101769808A (en) * | 2010-03-08 | 2010-07-07 | 中国航空工业集团公司西安飞机设计研究所 | Aircraft driving lever force measuring component and measuring method thereof |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2466034A (en) * | 1946-10-01 | 1949-04-05 | Byron Jackson Co | Tension measuring device |
-
1978
- 1978-12-29 DE DE19782856607 patent/DE2856607C2/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0153121A2 (en) * | 1984-02-13 | 1985-08-28 | Mettler-Toledo, Inc. | Compensated load cell |
EP0153121A3 (en) * | 1984-02-13 | 1987-08-19 | Reliance Electric Company | Load cell |
DE102008010281A1 (en) * | 2008-02-21 | 2009-09-03 | Sartorius Ag | sensor device |
DE102008010281B4 (en) * | 2008-02-21 | 2011-07-14 | Otto Bock Healthcare Products Gmbh | sensor device |
US8474329B2 (en) | 2008-02-21 | 2013-07-02 | Otto Bock Healthcare Products Gmbh | Pipe-shaped sensor device |
CN101769808A (en) * | 2010-03-08 | 2010-07-07 | 中国航空工业集团公司西安飞机设计研究所 | Aircraft driving lever force measuring component and measuring method thereof |
Also Published As
Publication number | Publication date |
---|---|
DE2856607C2 (en) | 1981-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0350532B1 (en) | Gauge-piece for coordinate measuring machines | |
EP0049501B1 (en) | Arrangement for measuring the pressure evolution inside cylindrical hollow objects | |
DE2038771B2 (en) | Pressure transducer | |
DE2900614C3 (en) | Force transducer | |
EP2524827A1 (en) | Roll stabilizer for a motor vehicle | |
EP0916077B1 (en) | Monolithic force sensor | |
DE102008037926B3 (en) | Device for tactile measurement of three-dimensional forces, has touch element, tracer pin and parallel spring-elements with strain sensors, where parallel spring-element is arranged transverse to tracer pin | |
AT390515B (en) | MEASURING VALUE | |
DE19922102B4 (en) | Fiber Bragg grating sensor arrangement for determining physical quantities | |
EP1983323B1 (en) | Multi-component force measuring device | |
DE1773727C3 (en) | Electromechanical transducer | |
DE102011007350B4 (en) | Sensor for the tactile measurement of forces and moments | |
DE2856607C2 (en) | Force transducer for measuring forces acting on a test body | |
DE102010012701B4 (en) | Micro-force sensor | |
DE2917966C2 (en) | Device for measuring force components in joints | |
CH652207A5 (en) | BEND COUPLING FOR SCALES. | |
DE1120754B (en) | Thrust dynamometer for power transmission means | |
CH645987A5 (en) | DEVICE FOR INITIATING A FORCE TO BE MEASURED IN A BENDING ROD. | |
DE2909164A1 (en) | Measuring longitudinal forces in vehicle steering track rods - using sprung body with strain gauge plates between rings | |
DE2837945C2 (en) | Strain transducer | |
DE2647780B2 (en) | Device for applying a prestress to strain gauges | |
DE3837776C2 (en) | ||
DE1932224B2 (en) | Electromechanical force transducer | |
WO2013174364A2 (en) | Device for temperature compensation for fbg extensometers | |
DE3808346C2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: ZF FRIEDRICHSHAFEN AG, 7990 FRIEDRICHSHAFEN, DE |
|
8339 | Ceased/non-payment of the annual fee |