WO1997030332A1 - Measuring spring for inductive force measurement - Google Patents

Measuring spring for inductive force measurement 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
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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)
French (fr)
Other versions
WO1997030332A9 (en
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/en
Priority to EP97900929A priority patent/EP0880685A1/en
Publication of WO1997030332A1 publication Critical patent/WO1997030332A1/en
Publication of WO1997030332A9 publication Critical patent/WO1997030332A9/en

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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.

Abstract

The invention relates to a device for inductive force measurement, in which a measuring spring is used which consist of a tension-free spring steel plate (1). In one plane said spring is shaped as a three-pronged fork in such a manner that the two outer prongs are the fixable ground element (2, 2') and the central prong is a movable ground element (3). The bending point (9, 9') is in the region of the recesses (7, 7') outside the clamping zone. The measuring spring is suitable for thread force measurement on a moving thread.

Description

Messfeder zur induktiven Kraftmessung Measuring spring for inductive force measurement
Die Erfindung betrifft eine verbesserte Messfeder zur induktiven Kraftmessung, bestehend aus einer spannungsfreien Federstahlplatte mit einem bewegbaren Masseteil und einem fixierbaren Masseteil, insbesondere zur Überwachung der Fadenzugkraft an einem laufenden Faden.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.
Aus der CH-A-671 829 ist eine Vorrichtung zur Überwachung der Fadenzugkraft an einem laufenden Faden bekannt, welche aus einer Federstahlplatte mit einem axialsymmetrischen bewegbaren Masseteil und einem axialsymmetrischen fixierbaren Masseteil besteht. Das fixierbare Masseteil weist eine Anzahl von inneren Aussparungen auf. Das bewegbare Masseteil ist über seine ganze Länge in einer Ebene auslenkbar. Die Biegestelle befindet sich innerhalb der Einspannung des fixierbaren Masseteils. Hier besteht der Nachteil darin, dass Zugkräfte im festen, im Halter eingespannten Masseteil entstehen, die zu Hysterese des Nullpunkts führen können. Die Grosse der Hysterese ist dabei abhängig von der vorherigen Auslenkung und von den aktuellen Einspannbedingungen. Ausserdem erfordert jede weitere Aussparung einen erheblichen technischen Aufwand bei der Herstellung einer solchen Feder.From CH-A-671 829 a device for monitoring the thread tension on a running thread is known, 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. In addition, each additional recess requires considerable technical effort in the manufacture of such a spring.
Aufgabe der Erfindung ist es, einen Fadenzugkraftaufnehmer zur Verfügung zu stellen, der weitgehend hysteresefrei arbeitet, der einfach und wirtschaftlicher herzustellen und zum Einbau in ein Messgerät geeignet ist.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.
Die erfindungsgemasse Aufgabe wird dadurch gelöst, dass die Messfeder als dreizinkige Gabel in einer Ebene so ausgebildet ist, dass die beiden äusseren Zinken den fixierbaren Masseteil und die mittlere Zinke einen um die Biegestelle bewegbaren Masseteil darstellen. Das bewegte Masseteil ist über seine ganze Länge in einer Ebene auslenkbar.The object according to the invention is achieved in that 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.
Der Übergangsbereich zwischen festem Masseteil und bewegbarem Masseteil ist als Biegestelle ausgebildet und liegt ausserhalb der Einspannzone. Das hat den Vorteil, dass keine Zugkräfte innerhalb der Einspannung im festen Masseteil auftreten und somit auch praktisch keine Hysterese des Nullpunktes auftritt.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. This has the advantage that there are no tensile forces within the clamping in the fixed mass part and thus practically no hysteresis of the zero point occurs.
Die Federstahlplatte weist bevorzugt eine Dicke von 0,4 mm bis 1,5 mm auf. Bei einer Dicke von weniger als 0,4 mm ist die Feder zu weich, d. h. , die Frequenz der Eigenresonanz könnte die Messung verfälschen; bei einer Dicke über 1,5 mm liegt der Messbereich über 10 N. Bei Fadenkräften beträchtlich über 10 N nimmt die Unlinearität des Aufnehmers schnell zu.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.
Die im fixierbaren Masseteil vorgesehenen Aussparungen sind paarweise angelegt und dienen zur Befestigung der Messfeder, die zwischen dem oberen und unteren Teil des Halters, der gleichzeitig die Magnetspulen trägt, eingeklemmt wird. Die beiden von den Zinkenspitzen entferntesten Aussparungen bilden die Biegestelle der Messfeder. Die Erfindung soll anhand einer Zeichnung näher beschrieben werden, es zeigen: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. The invention will be described in more detail with reference to a drawing, in which:
Fig. 1 eine erfindungsgemasse Messfeder Fig. 2 eine Messfeder nach dem Stand der Technik.Fig. 1 a measuring spring according to the invention. Fig. 2 a measuring spring according to the prior art.
Fig. 3 ein Querschnitt durch einen Messgeber zur Aufnahme der erfindungsgemässen Messfeder Fig. 4 eine schematische Ansicht eines im Betrieb befindlichen Messgebers.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.
In Fig. 1 ist eine Aufsicht auf eine erfindungsgemasse Federstahlplatte 1 gezeigt. Die Federstahlplatte 1 besteht aus einem fixierbaren Masseteil 2, einem symmetrischen Masseteil 2 ■ und einem bewegbaren mittleren Masseteil 3, der an seinem freien Ende mit einem runden Masseteil 4 versehen ist. Der Masseteil 4 dient einerseits zum Massenausgleich, damit die Erdanziehung keinen Einfluss auf die Messung ausübt. Andererseits stellt die flächenhafte runde Ausführung sicher, dass die Auslenkung der Messfeder von den sich darüber und darunter befindlichen Spulen sicher erfasst werden kann. Auf der Gegenseite 5 des Masseteils 4 ist eine nicht gezeigte Einrichtung zur Kraftleitung vorgesehen. Es sind Aussparungen 6,6' und 8,8' zur Befestigung der Federstahlplatte 1 und damit des fixierbaren Masseteil 2,2' vorgesehen. Aussparungen 7 und 7' bilden gleichzeitig den Bereich wo sich Biegestellen 9,9' befinden.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. On the other hand, the flat, round design ensures that the deflection of the measuring spring can be reliably detected by the coils above and below it. 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 '. Recesses 7 and 7 'simultaneously form the area where bending points 9,9' are located.
Fig. 2 zeigt eine Messfeder aus einer Federstahlplatte 11 nach dem Stand der Technik. Die Federstahlplatte 11 besteht gleichfalls aus einem fixierbaren Masseteil 12, einem symmetrischen Masseteil 12', jedoch aus bewegbaren mittleren Masseteilen 13, 13' und 14. Der Masseteil 14 ist als Scheibe ausgebildet. Der bewegbare Masseteil 13 ist an einen Ende 15 zur Aufnahme einer nicht gezeigten Krafteinleitung vorgesehen. Je ein Paar Aussparungen 16, 16' und 18, 18' sind zur Fixierung und die Aussparungen 17, 17' und 17a, 17a' sind so ausgebildet, dass sich zwischen ihnen die Biegestellen 19,19' ergeben.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.
In Fig. 3 ist ein Halter 20 gezeigt, der zur Aufnahme der erfindungsgemässen Messfeder in Form der Federstahlplatte 1 geeignet ist. Dabei kommt der runde Masseteil 4 zwischen die Ferritkerne einer Spule 21 zu liegen. Der Halter 20, 20' ist an einem Ende mit einem Kopfteil 22 und einem Deckel 23 versehen. Der Messgeber ist mit einem rohrförmigen Gehäuse 24 umgeben. Im Messgeber ist eine Apparatedose 25 mit elektrischen Zuleitungen 26 zu je einem Anschlussprint 27 mit der Spule 21 verbunden. Am Ende der Federstahlplatte 1 ist ein Keramikröhrchen als Fadenführer zur Krafteinleitung 28 vorgesehen.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. In the measuring transducer, an apparatus socket 25 is connected to the coil 21 with electrical feed lines 26 to a connection board 27 each. At the end of the spring steel plate 1, a ceramic tube is provided as a thread guide for the introduction of force 28.
In Fig. 4 wird mit dem Bezugszeichen 29 ein laufender Faden gezeigt, dessen Spannung zu messen ist und welcher über zwei mit Nuten versehene Keramikstifte 30 und 30' über das auf einem Ende der Federstahlplatte 1 angebrachte Keramikröhrchen 28 geführt wird. Anstelle von Keramikröhrchen 28 können auch Fadenleitrollen vorgesehen werden. In Fig. 4, 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. Instead of ceramic tubes 28, thread guide rollers can also be provided.

Claims

Patentansprüche claims
1. Messfeder zur induktiven Kraftmessung, bestehend aus einer spannungsfreien Federstahlplatte (l) mit einem bewegbaren Masseteil und einem fixierbaren Masseteil, dadurch gekennzeichnet, dass die Messfeder als dreizinkige Gabel in einer Ebene so ausgebildet ist, dass die beiden äusseren Zinken den fixierbaren Masseteil (2,2') und die mittlere Zinke einen um die Biegestelle (9,9') bewegbaren Masseteil (3) darstellen.1.Measuring spring for inductive force measurement, consisting of a tension-free spring steel plate (l) with a movable mass part and a fixable mass part, characterized in that the measuring spring is designed as a three-pronged fork in one plane so that the two outer tines hold the fixable mass part (2 , 2 ') and the middle prong represent a mass part (3) which can be moved about the bending point (9,9').
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Biegestelle (9,9') zwischen dem fixierbaren Masseteil (2,2') und dem bewegbaren Masseteil (3) ausserhalb der Einspannzone liegt .Device according to claim 1, characterized in that the bending point (9,9 ') between the fixable mass part (2,2') and the movable mass part (3) lies outside the clamping zone.
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ir. fixierbarer. Masseteil (2,2'} Aussparungen (6,6') und Aussparungen (7,7') und (8,8') vorgesehen sind.Device according to claim 1, characterized in that ir. Fixable. Mass part (2.2 '} recesses (6.6') and recesses (7.7 ') and (8.8') are provided.
Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die Federstahlplatte (l) eine Dicke von 0,4 mm bis 1,5 mm aufweist. Device according to claims 1 to 3, characterized in that the spring steel plate (l) has a thickness of 0.4 mm to 1.5 mm.
GEÄNDERTE ANSPRÜCHECHANGED REQUIREMENTS
[beim Internationalen Büro am 14. Juli 1997 (14.07.97) eingegangen, ursprüngliche Ansprüche 1-4 durch geänderte Ansprüche 1-3 ersetzt (1 Seite)][Received at the International Bureau on July 14, 1997 (July 14, 1997), original claims 1-4 replaced by amended claims 1-3 (1 page)]
1. Messfeder zur induktiven Kraftmessung, bestehend aus 5 einer spannungsfreien Federstahlplatte (1) mit einem bewegbaren Masseteil und einem fixierbaren Masseteil, dadurch gekennzeichnet, dass die Messfeder als dreizinkige Gabel in einer Ebene so ausgebildet ist, dass die beiden äusseren Zinken den fixierbaren 0 Masseteil (2,2') und die mittlere Zinke einen um die Biegestelle (9,9') bewegbaren Masseteil (3) darstellen, wobei die Biegestelle (9,9') zwischen dem fixierbaren Masseteil (2,2') und dem bewegbaren Masseteil (3) ausserhalb der Einspannzone liegt .1.Measuring spring for inductive force measurement, consisting of 5 a tension-free spring steel plate (1) with a movable mass part and a fixable mass part, characterized in that the measuring spring is designed as a three-pronged fork in one plane so that the two outer prongs form the fixable 0 mass part (2,2 ') and the middle prong represent a mass part (3) which can be moved around the bending point (9,9'), the bending point (9,9 ') between the fixable mass part (2,2') and the movable mass part (3) is outside the clamping zone.
2. Messfeder nach Anspruch 1 , dadurch gekennzeichnet, dass im fixierbaren Masseteil (2,2') Aussparungen2. Measuring spring according to claim 1, characterized in that in the fixable mass part (2,2 ') recesses
(6,6') und Aussparungen (7,7') und (8,8') vorgesehen sind.(6,6 ') and recesses (7,7') and (8,8 ') are provided.
3. Messfeder nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die Federstahlplatte (1) eine Dicke von 0,4 mm bis 1,5 mm aufweist.3. Measuring spring according to claims 1 to 3, characterized in that the spring steel plate (1) has a thickness of 0.4 mm to 1.5 mm.
GEÄNDERTES BUπ (ARTIKEL 19) MODIFIED BUπ (ARTICLE 19)
PCT/CH1997/000037 1996-02-14 1997-02-05 Measuring spring for inductive force measurement WO1997030332A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9528851A JP2000504833A (en) 1996-02-14 1997-02-05 Measuring spring for force measurement by electric induction
EP97900929A EP0880685A1 (en) 1996-02-14 1997-02-05 Measuring spring for inductive force measurement

Applications Claiming Priority (2)

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

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

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JP (1) JP2000504833A (en)
KR (1) KR19990087043A (en)
WO (1) WO1997030332A1 (en)

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

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

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