WO1997030332A1 - Ressort de mesure pour la mesure dynamometrique par induction - Google Patents

Ressort de mesure pour la mesure dynamometrique par induction Download PDF

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Publication number
WO1997030332A1
WO1997030332A1 PCT/CH1997/000037 CH9700037W WO9730332A1 WO 1997030332 A1 WO1997030332 A1 WO 1997030332A1 CH 9700037 W CH9700037 W CH 9700037W WO 9730332 A1 WO9730332 A1 WO 9730332A1
Authority
WO
WIPO (PCT)
Prior art keywords
mass part
fixable
spring
measuring spring
steel plate
Prior art date
Application number
PCT/CH1997/000037
Other languages
German (de)
English (en)
Other versions
WO1997030332A9 (fr
Inventor
Markus Thalmann
Andre Zumstein
Original Assignee
Rhodia Filtec Ag
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 Rhodia Filtec Ag filed Critical Rhodia Filtec Ag
Priority to JP9528851A priority Critical patent/JP2000504833A/ja
Priority to EP97900929A priority patent/EP0880685A1/fr
Publication of WO1997030332A1 publication Critical patent/WO1997030332A1/fr
Publication of WO1997030332A9 publication Critical patent/WO1997030332A9/fr

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
    • G01L5/106—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 cantilever beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • 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
    • G01L1/04—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
    • G01L1/044—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs of leaf springs
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to an improved measuring spring for inductive force measurement, consisting of a tension-free spring steel plate with a movable mass part and a fixable mass part, in particular for monitoring the thread tension on a running thread.
  • a device for monitoring the thread tension on a running thread which consists of a spring steel plate with an axially symmetrical movable mass part and an axially symmetric fixable mass part.
  • the fixable mass part has a number of inner cutouts.
  • the movable mass part can be deflected in one plane over its entire length. The bending point is within the clamping of the fixable mass part.
  • the disadvantage here is that tensile forces arise in the fixed mass part clamped in the holder, which can lead to hysteresis of the zero point.
  • the size of the hysteresis depends on the previous deflection and the current clamping conditions.
  • each additional recess requires considerable technical effort in the manufacture of such a spring.
  • the object of the invention is to provide a thread tension transducer that works largely free of hysteresis, that is simple and is more economical to manufacture and is suitable for installation in a measuring device.
  • the measuring spring is designed as a three-pronged fork in one plane in such a way that the two outer prongs represent the fixable mass part and the middle prong represents a mass part which can be moved about the bending point.
  • the moving mass part can be deflected in one plane over its entire length.
  • the transition region between the fixed part and movable part by mass of mass is provided as a bending point is formed un d outside the clamping zone.
  • the spring steel plate preferably has a thickness of 0 4 mm to 1.5 mm. At a thickness of less than 0, 4 mm the spring is too soft, ie, the frequency of self-resonance could falsify the measurement; with a thickness of more than 1.5 mm, the measuring range is over 10 N. With thread forces considerably above 10 N, the non-linearity of the transducer increases rapidly.
  • the recesses provided in the fixable mass part are created in pairs and serve to fasten the measuring spring, which is clamped between the upper and lower part of the holder, which also carries the magnetic coils.
  • the two recesses furthest from the tine tips form the bending point of the measuring spring.
  • Fig. 1 a measuring spring according to the invention.
  • Fig. 2 a measuring spring according to the prior art.
  • FIG. 3 shows a cross section through a measuring transducer for receiving the measuring spring according to the invention.
  • FIG. 4 shows a schematic view of a measuring transducer in operation.
  • the spring steel plate 1 shows a top view of a spring steel plate 1 according to the invention.
  • the spring steel plate 1 consists of a fixable mass part 2, a symmetrical mass part 2 ⁇ and a movable middle mass part 3, which is provided at its free end with a round mass part 4.
  • the mass part 4 serves on the one hand to balance the masses, so that the gravitational pull has no influence on the measurement.
  • the flat, round design ensures that the deflection of the measuring spring can be reliably detected by the coils above and below it.
  • a device for power transmission not shown, is provided on the opposite side 5 of the mass part 4, a device for power transmission, not shown, is provided.
  • Recesses 6, 6 'and 8, 8' are provided for fastening the spring steel plate 1 and thus the fixable mass part 2, 2 '.
  • Fig. 2 shows a measuring spring made of a spring steel plate 11 according to the prior art.
  • the spring steel plate 11 also consists of a fixable mass part 12, a symmetrical mass part 12 ', but of movable middle mass parts 13, 13' and 14.
  • the mass part 14 is designed as a disk.
  • the movable mass part 13 is provided at one end 15 for receiving a force transmission, not shown.
  • a pair of recesses 16 each 16 'and 18, 18' are for fixing and the recesses 17, 17 'and 17a, 17a' are designed such that the bending points 19, 19 'result between them.
  • FIG. 3 shows a holder 20 which is suitable for receiving the measuring spring according to the invention in the form of the spring steel plate 1.
  • the round mass part 4 comes to lie between the ferrite cores of a coil 21.
  • the holder 20, 20 ' is provided at one end with a head part 22 and a cover 23.
  • the sensor is surrounded by a tubular housing 24.
  • an apparatus socket 25 is connected to the coil 21 with electrical feed lines 26 to a connection board 27 each.
  • a ceramic tube is provided as a thread guide for the introduction of force 28.
  • reference numeral 29 shows a running thread, the tension of which is to be measured and which is guided over two grooved ceramic pins 30 and 30 'over the ceramic tube 28 attached to one end of the spring steel plate 1.
  • thread guide rollers can also be provided.

Landscapes

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

Abstract

L'invention concerne un dispositif de mesure dynamométrique par induction dans lequel une plaquette (1) en acier à ressort exempte de contrainte sert de ressort de mesure. Dans un plan, ledit ressort a la forme d'une fourche à trois pointes, les deux pointes extérieures constituant un élément de masse (2, 2') pouvant être fixé et la pointe centrale constituant un élément de masse (3) mobile. Le point de flexion (9, 9') se trouve dans la zone des évidements (7, 7') situés à l'extérieur de la zone de serrage. Le ressort de mesure peut être utilisé pour effectuer des mesures de la force d'un fil, ces mesures se faisant sur un fil en déplacement.
PCT/CH1997/000037 1996-02-14 1997-02-05 Ressort de mesure pour la mesure dynamometrique par induction WO1997030332A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9528851A JP2000504833A (ja) 1996-02-14 1997-02-05 電気誘導による力測定のための測定用ばね
EP97900929A EP0880685A1 (fr) 1996-02-14 1997-02-05 Ressort de mesure pour la mesure dynamometrique par induction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH376/96 1996-02-14
CH37696 1996-02-14

Publications (2)

Publication Number Publication Date
WO1997030332A1 true WO1997030332A1 (fr) 1997-08-21
WO1997030332A9 WO1997030332A9 (fr) 1998-03-05

Family

ID=4185611

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000037 WO1997030332A1 (fr) 1996-02-14 1997-02-05 Ressort de mesure pour la mesure dynamometrique par induction

Country Status (4)

Country Link
EP (1) EP0880685A1 (fr)
JP (1) JP2000504833A (fr)
KR (1) KR19990087043A (fr)
WO (1) WO1997030332A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6809820B2 (en) * 2002-04-18 2004-10-26 National Research Council Of Canada Small particle analysis by laser induced incandescence
US11518106B2 (en) * 2020-01-03 2022-12-06 Shenzhen Creality 3D Technology Co., Ltd. Strain sensor, 3D printing head assembly and 3D printer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718047A (en) * 1969-12-26 1973-02-27 Yokogawa Electric Works Ltd Force-to-signal converter
US3969934A (en) * 1972-08-15 1976-07-20 Raskin Seymour H Load cell amplifier
CH671829A5 (en) * 1986-01-10 1989-09-29 Schweizerische Viscose Continuous wire tension measuring device - has spring steel plate with movable section deflected by applied wire tension

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718047A (en) * 1969-12-26 1973-02-27 Yokogawa Electric Works Ltd Force-to-signal converter
US3969934A (en) * 1972-08-15 1976-07-20 Raskin Seymour H Load cell amplifier
CH671829A5 (en) * 1986-01-10 1989-09-29 Schweizerische Viscose Continuous wire tension measuring device - has spring steel plate with movable section deflected by applied wire tension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6809820B2 (en) * 2002-04-18 2004-10-26 National Research Council Of Canada Small particle analysis by laser induced incandescence
US11518106B2 (en) * 2020-01-03 2022-12-06 Shenzhen Creality 3D Technology Co., Ltd. Strain sensor, 3D printing head assembly and 3D printer

Also Published As

Publication number Publication date
KR19990087043A (ko) 1999-12-15
JP2000504833A (ja) 2000-04-18
EP0880685A1 (fr) 1998-12-02

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