DE3020785A1 - Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weakness - Google Patents
Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weaknessInfo
- Publication number
- DE3020785A1 DE3020785A1 DE19803020785 DE3020785A DE3020785A1 DE 3020785 A1 DE3020785 A1 DE 3020785A1 DE 19803020785 DE19803020785 DE 19803020785 DE 3020785 A DE3020785 A DE 3020785A DE 3020785 A1 DE3020785 A1 DE 3020785A1
- Authority
- DE
- Germany
- Prior art keywords
- points
- strain gauges
- measurement
- transducer according
- weak points
- 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- Withdrawn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
- 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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Meßwandler Transducers
Der Zweck der Erfindung ist, ein leichtes rohrförmiges Wandlerelement herzustellen, das sich durch einen sehr geringen Durchmesser und in leicht einbaubarer, feinjustierbarer Weise, z. B.The purpose of the invention is to provide a lightweight tubular transducer element to produce, which is due to a very small diameter and easy to install, finely adjustable way, e.g. B.
in Gewindestutzen von Niederdruckmeßfühlern, unterbringen läßt.can be accommodated in the threaded connector of low pressure sensors.
Es sind elektrische Kraftaufnehmer bekannt, deren elektrischer Wandlereffekt darauf beruht, daß an flachen Teilen von elastischen Bauelementen Schubspannungen erzeugt werden, die mit entsprechenden Dehnungsmeßstreifen (DMS) für Schubspannungen, in Zug- und Druckrichtung, bestückt sind (siehe Anmeldungen P 29 01 995.2 und P 27 25 559.0).There are known electrical force transducers, their electrical converter effect is based on the fact that shear stresses on flat parts of elastic components generated with the appropriate strain gauges (DMS) for shear stresses, in pulling and pushing directions (see registrations P 29 01 995.2 and P 27 25 559.0).
Sollen sehr geringe Materialspannungen als Meßwerte z. B. für Flüssigkeitsdruckaufnehmer dienen, müßten die Schubspannungsmeßstellen sehr dünn werden und können bei Stauchbewegungen leicht einknicken, deshalb sind sie vorzugsweise schalenförmig ausgebildet.If very low material stresses are to be used as measured values e.g. B. for fluid pressure transducers serve, the shear stress measuring points would have to be very thin and can with upsetting movements buckle slightly, which is why they are preferably designed in the shape of a shell.
Anhand der Abb. 1 bis Abb. 4 wird die Erfindung im folgenden näher beschrieben.The invention is explained in more detail below with reference to FIGS. 1 to 4 described.
Das Wandlerelement besteht aus einem knickfesten, stabilen rohrförmigen Körper 1, der zum Einbau z. 3. in Aufnehmerteile 2 mit einem Gewinde 3 und Schlüsselflächen 4 versehen ist. Mit einer Kontermutter 5 kann eine justierte Stellung mit Uberlastschutz 6 für den Weg einer Membrane 7 fixiert werden (Abb. 1 vergrößert).The transducer element consists of a kink-resistant, stable tubular Body 1, which is used for installation, for. 3. in transducer parts 2 with a thread 3 and wrench flats 4 is provided. With a lock nut 5, an adjusted position with overload protection 6 can be fixed for the path of a membrane 7 (Fig. 1 enlarged).
An zwei gegenüberliegenden Stellen 8 bzw. 9 ist die Wandung 10 des Rohres 1 auf einem Teil des Umfanges dünner gestaltet und dient zur Aufnahme der Schubspannung-DMS 11 bzw. 12. Zwei wechselseitig angebrachte Schlitze 13-13' bewirken, daß die zur Verfügung stehenden verhältnismäßig geringen axialen Zug-oder Druckkräfte über diese Schwachstellen 8 oder 9 geleitet werden, wodurch die Wandlerempfindlichkeit sehr hoch ist.At two opposite points 8 and 9, the wall 10 of the Tube 1 designed thinner on part of the circumference and is used to accommodate the Shear stress strain gauges 11 or 12. Two alternately attached slots 13-13 'cause that the available relatively low axial tensile or compressive forces be routed through these weak points 8 or 9, reducing the transducer sensitivity is very high.
Durch die Schalenform der schubbeanspruchten Stellen 8 des Wandlers ist eine verhältnismäßig hohe Stabilität gesichert, Abb. 3. Diese können aber auch eben sein, Abb. 4.Due to the shell shape of the shear stressed points 8 of the transducer a relatively high stability is ensured, Fig. 3. But this can also be flat, Fig. 4.
Die Verbindung, beispielsweise einer Membrane 7 mit dem Meßwandler erfolgt durch eine Schubstange 15 und die achsverschiebbare Klemmvorrichtung 14-19.The connection, for example a membrane 7 with the transducer takes place by a push rod 15 and the axially displaceable clamping device 14-19.
LeerseiteBlank page
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803020785 DE3020785A1 (en) | 1980-05-31 | 1980-05-31 | Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weakness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803020785 DE3020785A1 (en) | 1980-05-31 | 1980-05-31 | Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weakness |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3020785A1 true DE3020785A1 (en) | 1981-12-10 |
Family
ID=6103709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803020785 Withdrawn DE3020785A1 (en) | 1980-05-31 | 1980-05-31 | Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weakness |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3020785A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4203551A1 (en) * | 1992-02-07 | 1993-08-12 | Gif Gmbh | Measuring shaft for determining working characteristics at driven shaft - connects with driven shaft of drive unit and comprises tubular shaft body carrying measuring sleeve with strain gauge |
WO2010079418A1 (en) * | 2009-01-09 | 2010-07-15 | Endosense Sa | A fiber optic force sensing catheter |
US8048063B2 (en) | 2006-06-09 | 2011-11-01 | Endosense Sa | Catheter having tri-axial force sensor |
US8075498B2 (en) | 2005-03-04 | 2011-12-13 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
US8157789B2 (en) | 2007-05-24 | 2012-04-17 | Endosense Sa | Touch sensing catheter |
US8182433B2 (en) | 2005-03-04 | 2012-05-22 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
US8298227B2 (en) | 2008-05-14 | 2012-10-30 | Endosense Sa | Temperature compensated strain sensing catheter |
US8622935B1 (en) | 2007-05-25 | 2014-01-07 | Endosense Sa | Elongated surgical manipulator with body position and distal force sensing |
US8894589B2 (en) | 2005-08-01 | 2014-11-25 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
JP2020020582A (en) * | 2018-07-30 | 2020-02-06 | ユニパルス株式会社 | Torque converter |
US10561368B2 (en) | 2011-04-14 | 2020-02-18 | St. Jude Medical International Holding S.À R.L. | Compact force sensor for catheters |
US11445937B2 (en) | 2016-01-07 | 2022-09-20 | St. Jude Medical International Holding S.À R.L. | Medical device with multi-core fiber for optical sensing |
-
1980
- 1980-05-31 DE DE19803020785 patent/DE3020785A1/en not_active Withdrawn
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4203551A1 (en) * | 1992-02-07 | 1993-08-12 | Gif Gmbh | Measuring shaft for determining working characteristics at driven shaft - connects with driven shaft of drive unit and comprises tubular shaft body carrying measuring sleeve with strain gauge |
US11998404B2 (en) | 2005-03-04 | 2024-06-04 | St. Jude Medical International Holding S.À R.L. | Medical apparatus system having optical fiber load sensing capability |
US10973606B2 (en) | 2005-03-04 | 2021-04-13 | St. Jude Medical International Holding S.À R.L. | Medical apparatus system having optical fiber load sensing capability |
US8075498B2 (en) | 2005-03-04 | 2011-12-13 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
US9907618B2 (en) | 2005-03-04 | 2018-03-06 | St Jude Medical International Holding S.À R.L. | Medical apparatus system having optical fiber sensing capability |
US8182433B2 (en) | 2005-03-04 | 2012-05-22 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
US8961436B2 (en) | 2005-03-04 | 2015-02-24 | St. Jude Medical Luxembourg Holding S.á.r.l. | Medical apparatus system having optical fiber load sensing capability |
US8932288B2 (en) | 2005-03-04 | 2015-01-13 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
US8894589B2 (en) | 2005-08-01 | 2014-11-25 | Endosense Sa | Medical apparatus system having optical fiber load sensing capability |
US8435232B2 (en) | 2006-06-09 | 2013-05-07 | Nicolas Aeby | Catheter having tri-axial force sensor |
US11883131B2 (en) | 2006-06-09 | 2024-01-30 | St. Jude Medical International Holding S.À R.L. | Triaxial fiber optic force sensing catheter |
US8567265B2 (en) | 2006-06-09 | 2013-10-29 | Endosense, SA | Triaxial fiber optic force sensing catheter |
US9597036B2 (en) | 2006-06-09 | 2017-03-21 | St. Jude Medical International Holding S.À R.L. | Triaxial fiber optic force sensing catheter and method of use |
US10596346B2 (en) | 2006-06-09 | 2020-03-24 | St. Jude Medical International Holding S.À R.L. | Triaxial fiber optic force sensing catheter |
US8048063B2 (en) | 2006-06-09 | 2011-11-01 | Endosense Sa | Catheter having tri-axial force sensor |
US8157789B2 (en) | 2007-05-24 | 2012-04-17 | Endosense Sa | Touch sensing catheter |
US9993617B1 (en) | 2007-05-25 | 2018-06-12 | St. Jude Medical International Holdings S.À R.L. | Elongated surgical manipulator with body position and distal force sensing |
US8622935B1 (en) | 2007-05-25 | 2014-01-07 | Endosense Sa | Elongated surgical manipulator with body position and distal force sensing |
US10905855B2 (en) | 2007-05-25 | 2021-02-02 | St. Jude Medical International Holding S.ár.l. | Elongated surgical manipulator with body position and distal force sensing |
US8298227B2 (en) | 2008-05-14 | 2012-10-30 | Endosense Sa | Temperature compensated strain sensing catheter |
CN102341053B (en) * | 2009-01-09 | 2015-01-07 | 恩杜森斯公司 | Triaxial fiber optic force sensing catheter |
WO2010079418A1 (en) * | 2009-01-09 | 2010-07-15 | Endosense Sa | A fiber optic force sensing catheter |
US10561368B2 (en) | 2011-04-14 | 2020-02-18 | St. Jude Medical International Holding S.À R.L. | Compact force sensor for catheters |
US11564628B2 (en) | 2011-04-14 | 2023-01-31 | St. Jude Medical International Holding S.À R.L. | Compact force sensor for catheters |
US11445937B2 (en) | 2016-01-07 | 2022-09-20 | St. Jude Medical International Holding S.À R.L. | Medical device with multi-core fiber for optical sensing |
US11998310B2 (en) | 2016-01-07 | 2024-06-04 | St. Jude Medical International Holding S.À R.L. | Medical device with multi-core fiber for optical sensing |
JP7204091B2 (en) | 2018-07-30 | 2023-01-16 | ユニパルス株式会社 | torque transducer |
JP2020020582A (en) * | 2018-07-30 | 2020-02-06 | ユニパルス株式会社 | Torque converter |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8130 | Withdrawal |