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 weakness

Info

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Withdrawn
Application number
DE19803020785
Other languages
German (de)
Inventor
Erich 7993 Kressbronn 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 DE19803020785 priority Critical patent/DE3020785A1/en
Publication of DE3020785A1 publication Critical patent/DE3020785A1/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Withdrawn legal-status Critical Current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
    • 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

Abstract

The light tubular transducer element of very small dia. can be easily installed in the threaded adapters of low press. measurement sensors so as to be accurately adjustable. A hollow tubular body (1) with a mounting thread has weak points (8) suitably positioned to accommodate shearing stress strain gauges (11). Cut-out sections (13) below the weak points bound the shearing force fields. A threaded end (3) has a safety stop (6) for a membrane (7) and is fixed in position by a lock nut. A clamping assembly (14-19) enables a push-or draw rod (15) to be coupled in to transfer the measurement force to the measurement points (8). Leads (18) are fed to the strain gauges (11) in the tube (10) via holes (16) in a sealing face (17) above the measurement point.

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)

PatentansPruche C MeBwandler dadurch gekennzeichnet, daß ein rohrförmiger mit Halterungsgewinde (3) versehener Hohlkörper (1) für die Aufnahme von Schubspannungsmeßstreifen (11-12) an geeigneter Stelle Schwachstellen (8) bzw. (9) aufweist, die wechselseitig ober- und unterhalb dieser Schwachstellen (8) bzw. (9) Einschnitte (13-13') aufweisen, welche diese Schubkraftfelder eingrenzen. Patent claims C measuring transducer characterized in that a tubular Hollow body (1) provided with a mounting thread (3) for holding shear stress measuring strips (11-12) has weak points (8) or (9) at a suitable point, which mutually have incisions (13-13 ') above and below these weak points (8) or (9), which limit these thrust fields. 2 Meßwandler nach anspruch 1, dadurch gskennzeichnet, daß ein Gewindeende (3) mit einstellbarem Sicherheitsanschlag (6) z. B. für eine Membrane (7) dient und durch eine Kontermutter (5) festgestellt werden kann. 2 transducer according to claim 1, characterized in that a threaded end (3) with adjustable safety stop (6) e.g. B. is used for a membrane (7) and can be determined by a lock nut (5). 3 Meßwandler nach Anspruch 1 und 2, dadurch gekennzeichnet, daß eine Klemmvorrichtung (14-19) die Ankoppelung einer Schub- bzw. Zugstange (15) ermöglicht, die 4te Meßkraft auf die Meßstellen (8) bzw. (9) überträgt. (Abb. 1 und 3). 3 transducer according to claim 1 and 2, characterized in that one Clamping device (14-19) enables a push or pull rod (15) to be coupled, transfers the 4th measuring force to the measuring points (8) or (9). (Fig. 1 and 3). 4 Meßwandler nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Zuleitungen (18) zu den DMS (11) und (12) innerhalb des Rohres (10) durch die Bohrungen (16) geführt werden. 4 transducer according to claim 1 to 3, characterized in that the Feed lines (18) to the strain gauges (11) and (12) inside the tube (10) through the bores (16). 5 Meßwandler nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß an dem rohrförmigen Körper (1) oberhalb und unterhalb der Meßstellen (8-9) Schldsselflächen (4) und (17) angeordnet sind. 5 transducer according to claim 1 to 4, characterized in that an the tubular body (1) above and below the measuring points (8-9) key surfaces (4) and (17) are arranged. 6 Meßwandler nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die mit DMS (11-12) bestückten Schwachstellen als ebene (9) oder runde (8) Flächen ausgebildet sind und mit dem Hohlkörper aus einem Stück bestehen. 6 transducer according to claim 1 to 5, characterized in that the Weak points equipped with strain gauges (11-12) are designed as flat (9) or round (8) surfaces and are made in one piece with the hollow body.
DE19803020785 1980-05-31 1980-05-31 Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weakness Withdrawn DE3020785A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (26)

* Cited by examiner, † Cited by third party
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
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
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
US8075498B2 (en) 2005-03-04 2011-12-13 Endosense Sa 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
US8182433B2 (en) 2005-03-04 2012-05-22 Endosense Sa 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
US8894589B2 (en) 2005-08-01 2014-11-25 Endosense Sa Medical apparatus system having optical fiber load sensing capability
US8567265B2 (en) 2006-06-09 2013-10-29 Endosense, SA Triaxial fiber optic force sensing catheter
US10596346B2 (en) 2006-06-09 2020-03-24 St. Jude Medical International Holding S.À R.L. Triaxial fiber optic force sensing catheter
US8435232B2 (en) 2006-06-09 2013-05-07 Nicolas Aeby Catheter having tri-axial force sensor
US8048063B2 (en) 2006-06-09 2011-11-01 Endosense Sa Catheter having tri-axial force sensor
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
US11883131B2 (en) 2006-06-09 2024-01-30 St. Jude Medical International Holding S.À R.L. Triaxial fiber optic force sensing catheter
US8157789B2 (en) 2007-05-24 2012-04-17 Endosense Sa Touch sensing catheter
US8622935B1 (en) 2007-05-25 2014-01-07 Endosense Sa Elongated surgical manipulator with body position and distal force sensing
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
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
JP2020020582A (en) * 2018-07-30 2020-02-06 ユニパルス株式会社 Torque converter
JP7204091B2 (en) 2018-07-30 2023-01-16 ユニパルス株式会社 torque transducer

Similar Documents

Publication Publication Date Title
EP0504676B1 (en) Sensor for strain measurement
EP0049501B1 (en) Arrangement for measuring the pressure evolution inside cylindrical hollow objects
DE2934414A1 (en) SYSTEM FOR MEASURING A FORCE WITH DIRECTION-ORIENTED VOLTAGE MEASURING ELEMENTS
DE3020785A1 (en) Measurement transducer for insertion in narrow tubular bodies - contains shearing force strain gauges located at points of weakness
DE3631647A1 (en) THICK LAYER STRETCH MEASUREMENT STRIP FOR MEASURING STRESSES AND STRESSES IN MECHANICAL PARTS AND STRUCTURES
EP0255084A2 (en) Pressure measuring cell
DE1531527A1 (en) Filling assembly for use in aircraft weighing systems
DE2401360A1 (en) ELECTROMECHANICAL TRANSMITTER
DE2904844C3 (en) Pressure measuring device for measuring and monitoring concrete stresses
DE19545091B4 (en) Measuring instrument with a pressure transducer
DE3036485A1 (en) Hydraulic ram for mining machinery - has internal detector for length-measurement device between fixed and moving members
DE3327265A1 (en) IMPROVED METER FOR MEASURING PRESSURE OF A LIQUID, ESPECIALLY AN AGGRESSIVE AND HOT LIQUID
DE1950836A1 (en) Strain gauges
DE2263901B2 (en) Transmitter
DE3405127A1 (en) Force transducer
DE2856607C2 (en) Force transducer for measuring forces acting on a test body
DE2909164A1 (en) Measuring longitudinal forces in vehicle steering track rods - using sprung body with strain gauge plates between rings
DE3003928C2 (en) Device for measuring the change in shape or the state of tension of a casing string
DE3705471A1 (en) Force-measuring device
DE2234025A1 (en) FORCE MEASURING DEVICE
EP0561021B1 (en) Force measuring device
DE3150383C2 (en) Screw tension meter
CH417147A (en) Force transducer
CH640048A5 (en) Strainometer
DE2630126A1 (en) PRESSURE MEASURING CONVERTER

Legal Events

Date Code Title Description
8130 Withdrawal