EP1623237A1 - Procede et dispositif de determination du sens de deplacement d'un composant de palier a roulement - Google Patents

Procede et dispositif de determination du sens de deplacement d'un composant de palier a roulement

Info

Publication number
EP1623237A1
EP1623237A1 EP04704536A EP04704536A EP1623237A1 EP 1623237 A1 EP1623237 A1 EP 1623237A1 EP 04704536 A EP04704536 A EP 04704536A EP 04704536 A EP04704536 A EP 04704536A EP 1623237 A1 EP1623237 A1 EP 1623237A1
Authority
EP
European Patent Office
Prior art keywords
resistor
measuring
bearing
bearing component
movement
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Withdrawn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
EP04704536A
Other languages
German (de)
English (en)
Inventor
Alfred Pecher
Henry Van Der Knokke
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
FAG Kugelfischer AG and Co OHG
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 FAG Kugelfischer AG and Co OHG filed Critical FAG Kugelfischer AG and Co OHG
Publication of EP1623237A1 publication Critical patent/EP1623237A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings

Definitions

  • the invention relates to a measuring arrangement, a roller bearing and a method for determining the direction of movement of a roller bearing component according to the features of the preambles of claims 1, 6 and 9.
  • a so-called measuring roller bearing is known from DE 2746 937 C2, in which a force acting on the roller bearing is detected by means of strain-sensitive sensors which are arranged on or in the stationary bearing shell thereof. These strain-sensitive sensors are designed as strain gauging resistors and interconnected in a Wheatstone measuring bridge.
  • DE 10041 093 A1 shows a roller bearing with strain-sensitive sensors with which, among other things, the rotational speed of a rotatable roller bearing shell can be determined.
  • These sensors are two mutually assigned strain gauges or strain gauges, which are attached to the fixed outer bearing shell.
  • the two strain gauges can be arranged with respect to one another in such a way that they are connected in series and are each offset in the bearing shell by half the angular distance of the rolling elements in the direction of rotation.
  • DE 10041 093 gives no indication of how the direction of rotation of the balls of the rolling bearing and thus the direction of rotation of a rotating bearing shell can be determined with this measuring bearing.
  • a measuring arrangement in a rolling bearing is known, with which, in addition to the force acting on the rolling bearing, the speed and the running direction of the rolling elements in the bearing can also be determined.
  • This measuring arrangement is distinguished with regard to the detection of the direction of rotation in that several pairs of strain-sensitive sensor elements are attached to or on a bearing shell at an angular distance from one another which is approximately 14 of the angular distance of the rolling elements located in the rolling bearing.
  • the pairs of sensors on the bearing shell are arranged offset from one another in such a way that they assume, for example, a 12 o'clock position or a 9 o'clock position.
  • this publication ensures that the measurement signals from the two sensor elements in the 12 o'clock position and those in the 9 o'clock position have a mutual phase offset, with the aid of which the running direction of the rolling elements and thus the direction of rotation of the movable bearing ring can be determined.
  • this document discloses that an evaluation device is necessary to determine the running direction of the rolling elements, the signals generated by the two sensor elements of each pair of sensor elements receives and determines the relative phase position of each of the rolling elements based on the sensor elements from the amplitude of the signal modulation. From this relative phase position, it is then possible to conclude the running direction of the components guided in the roller bearing.
  • This structure of the measuring arrangement for determining the direction of rotation, for example of a component guided in a roller bearing, is comparatively complex.
  • the application of the sensor elements of each pair of sensor elements and the precise positioning of the sensor pairs relative to one another require a very careful and therefore rather cost-intensive procedure.
  • the object of the invention is to propose a movement direction measuring device for rolling bearings such as rotary and linear bearings, which has a particularly inexpensive and less complex structure.
  • a rolling bearing with such a measuring device and an evaluation method for a measuring signal generated by the measuring device are to be presented.
  • the invention is based on a measuring arrangement on or in a rolling bearing for determining the direction of movement of a movable bearing component relative to a preferably fixed bearing component, in which the measuring arrangement comprises electrical resistances (e.g. strain gauging resistors) which, depending on the pressure and / or tractive force, have their electrical resistances Change resistance and are interconnected in a bridge circuit.
  • electrical resistances e.g. strain gauging resistors
  • the bridge circuit With regard to such a measuring arrangement, it is provided that four resistors of the bridge circuit are arranged in a row on one of the bearing components parallel to the direction of movement of the rolling elements or of the movable bearing component, that the distance K from the first resistor to the second resistor is as large as the distance L of the third resistor to the fourth resistor, and that the distance J between the two middle resistors is greater than the distance K or L between the first resistor and the second resistor or the third resistor and the fourth resistor.
  • measuring roller bearings can therefore be manufactured very inexpensively and can be used advantageously for mounting rotating or linearly moving movement elements such as pumps, pneumatic devices, piston-cylinder arrangements or sealing systems.
  • the distance H between the first resistor and the third resistor and the distance G between the second resistor and the fourth resistor is the same as the distance between two rolling elements arranged directly one behind the other.
  • more than just one of the measuring bridges according to the invention can be attached to the measuring bearing and connected to an evaluation device.
  • the measuring bridges are preferably arranged on the unmoved bearing component.
  • the invention also relates to a rolling bearing, in or on the bearing component of which the resistors of the measuring device according to the invention are mounted in any area.
  • this measuring range lies in a circumferential groove of a fixed bearing outer ring or in a longitudinal groove of a fixed linear bearing component, in which the resistances of the measuring bridge together with the connecting lines belonging to the measuring bridge are sputtered on.
  • these electrical resistors can also be applied as strain gauges on a flexible substrate carrier and glued together with this in the groove mentioned.
  • shape of the strain gauge measuring strips commercially available rectangular or strain gauge measuring strips in any basic shape can be used.
  • the invention also relates to a method for determining the direction of movement of the movable bearing component with a measurement signal of the measurement arrangement according to the invention.
  • the measurement signal M of the measuring bridge with the resistances mentioned with regard to the left or right rotation of the movable bearing component is analyzed to determine whether the respective positive amplitude maximum A max occurs at a point in time that does not fall in the middle t sym between the occurrence of two consecutive negative amplitude maxima Amj n . , A m lies in2.
  • equation GI.1 and equation GI.2 are compared with one another and the signs, if the signs match, are regarded as a true movement direction indicator in order to subsequently make this available for further information utilization. If the signs determined by the two calculations (GI.1, GI.2) deviate from one another, the measurement and calculation results are at least partially rejected and new measurements and calculations are carried out to determine the direction of movement.
  • the measuring arrangement according to the invention a roller bearing with the measuring arrangement and a method for evaluating the measuring signal generated by the measuring arrangement, as well as their advantageous configurations, can be explained on the basis of concrete exemplary embodiments which are shown in the attached drawing. Show in it
  • FIG. 1 shows a schematic cross section through a rolling bearing according to the invention
  • FIG. 2 shows a plan view of the circumference of the bearing according to FIG. 1 in the area of the measuring bridge
  • FIG. 3 shows the electrical measuring bridge circuit according to FIG. 2 in a simplified manner
  • FIG. 4 shows a comparison of a resistance arrangement of a measuring bridge according to the prior art with a resistance arrangement according to the invention
  • FIG. 5 shows a measurement signal generated by the measuring bridge according to the invention with measuring points for calculating the direction of movement of a bearing component
  • FIG. 6 shows a representation as in FIG. 5 with other measuring points.
  • Figure 1 accordingly shows a schematic cross-sectional view of a rolling bearing, in which a fixed outer ring 1 by means of rolling elements 3 rotatably supports an inner ring 2.
  • This inner ring 2 serves to receive a component, not shown here, which exerts a force F on the inner ring 2.
  • this force F acts on the outer ring 1 via the inner ring 2 and the rolling elements 3.
  • Measuring resistors R1, R2, R3, R4 attached which change their electrical resistance depending on the strain and with which therefore the deformation of the external ring 1 when rolling over each measuring resistor R1, R2, R3, R4 by the rolling elements 3 can be determined.
  • FIG. 1 shows that a second measuring bridge with resistors R11, R21, R31, R41 can also be arranged on the rotatable outer bearing ring 1, which is provided and suitable for generating a comparable measuring signal in the measuring region 5 as the first measuring bridge ,
  • this second measuring bridge will only have to be provided if, for example, to increase the number of measured values or to verify the measured values of the first measuring bridge, further measured values are desired.
  • the measuring resistors R1, R2, R3, R4 are preferably placed in a circumferential groove 4 of the outer ring 1 and arranged in a gluing or sputtering area 7 such that two resistors R1, R2 and R3, R4 each have one A pair of axially parallel to the direction of movement of the inner ring 1 and the rolling elements 3 are positioned.
  • the resistors R1, R2, R3, R4 are interconnected to form a measuring bridge 8, which is shown in a simple circuit diagram in FIG. 3.
  • This measuring bridge 8 is subjected to a voltage U in a manner known per se and supplies a measuring signal M via the contact parts V- and V +.
  • FIG. 4 in the upper half of the illustration, in known measuring bridges the electrical resistances are arranged in such a way that they have the same distances B, C, D from one another and no pairing is provided.
  • the arrangement according to the invention of the electrical resistors R1, R2, R3, R4 of the measuring bridge 8 is shown, with which the direction of rotation of the inner ring 2 can be determined in this example.
  • the resistors R1, R2, R3, R4 are arranged parallel to the direction of movement of the rolling elements 3 or of the movable bearing inner ring 2 in a row in such a way that the resistors R1 and R3 and the resistors R2 and R4 each forming a pair are shifted against each other in comparison to the arrangement according to the prior art.
  • the distance K from the first resistor R1 to the second resistor R2 is the same as the distance L from the third resistor R3 to the fourth resistor R4.
  • the distance J between the two middle resistors R2 and R3 is greater than the distances K and L between the first resistor R1 and the second resistor R2 or the third resistor R3 and the fourth resistor R4.
  • the distance H between the first resistor R1 and the third resistor R3 and the distance G between the second resistor R2 and the fourth resistor R4 is the same as the distance between two immediately adjacent rolling elements third
  • FIG. 5 and FIG. 6 show a measuring signal M, which is shown by way of example in FIG. 5 and FIG. 6.
  • the measured voltage curves do not have a symmetrical, but an asymmetrical curve.
  • This asymmetry is due to the fact that the distance K or L between two resistors R1, R2 or R3, R4 in the measuring bridge 8 is smaller than the distance J between two immediately adjacent resistors R2, R3.
  • the superimposition of the two changes in resistance of the resistors R1, R2 then leads to an asymmetrical deformation of the measuring signal M of the measuring bridge 8.
  • the degree of asymmetry is exaggerated in FIG. 5 and FIG.
  • the symmetry can be derived from the measured values t m ini and t min 2 of the times for the occurrence of two successive negative amplitude maxima A m i n i and A m - n2 and with t max ⁇ for the time of the positive amplitude maximum A ma ⁇ i calculate the measurement curve M.
  • the result of this calculation depends on the sign of the determination of the direction of movement, to which a defined direction of movement is assigned. So it depends on the installation position of a measuring bearing according to the invention whether a left-turning measuring bearing generates a positive or negative calculation value. However, once a sign is assigned to a certain direction of movement and the bearing is installed by definition, the movement direction calculation gives a reliable value with regard to the actual direction of rotation of the bearing.
  • t max 2 ⁇ t maxi sym - sign • (t min 1 - t max l) (Eq 2) where the measured values i and t ma ⁇ 2 for the times for the occurrence of two successive positive amplitude maxima and tmini for the time of the negative amplitude maximum mean A m i n ⁇ .
  • FIG. 6 shows the measurement curve M in a time period in which the measurements for the calculation are carried out using the second equation GI.2.
  • This point of symmetry t sym is namely in the middle of the period t A , which lies between the occurrence of the two positive amplitude maxima A ma ⁇ i and A ma ⁇ 2 at times t max ⁇ and t ma ⁇ 2.
  • This second calculation gives a second result value for the symmetry of the measurement signal, so that with a subsequent sign comparison of the calculation results of the equations GI.1 and GI.2, the security of the direction of movement determination can be increased.
  • the ascertained sign or direction of movement value is only passed on for further information processing (eg display device, control computer) if both calculation results have led to the same sign value. If the calculations show different signs, the determined values are averaged (preferably averaged over an odd number of individual results) and a new measurement and calculation process is carried out to determine the direction of movement. LIST OF REFERENCE NUMBERS

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

L'invention concerne un dispositif de mesure logé dans un palier à roulement, destiné à déterminer le sens de déplacement d'un élément de palier mobile (2) par rapport à un élément de palier fixe (1). L'invention vise à mettre en oeuvre une construction particulièrement économique dudit dispositif de mesure. A cet effet, quatre résistances (R1, R2, R3, R4), dépendant de la pression, d'un circuit en pont (8), sont disposées dans une zone de mesure, sur un composant de palier (1, 2), parallèlement au sens de déplacement des corps de roulement (3) ou du composant de palier mobile (2), en série les unes derrière les autres ; l'écart (R1-R2) est identique à l'écart (R3-R4) ; et, l'écart (R2-R3) est supérieur aux autres écarts. La position des résistances et du circuit en pont est choisie de telle manière qu'un seul signal de sortie de forme asymétrique est créé. Le sens de rotation est par exemple déterminé par l'évaluation de l'écart d'un maximum par rapport à la moyenne de deux minima adjacents.
EP04704536A 2003-01-31 2004-01-23 Procede et dispositif de determination du sens de deplacement d'un composant de palier a roulement Withdrawn EP1623237A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10303876A DE10303876A1 (de) 2003-01-31 2003-01-31 Messanordnung, Wälzlager und Verfahren zur Ermittlung der Bewegungsrichtung eines Wälzlagerbauteils
PCT/DE2004/000096 WO2004068146A1 (fr) 2003-01-31 2004-01-23 Procede et dispositif de determination du sens de deplacement d'un composant de palier a roulement

Publications (1)

Publication Number Publication Date
EP1623237A1 true EP1623237A1 (fr) 2006-02-08

Family

ID=32695103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04704536A Withdrawn EP1623237A1 (fr) 2003-01-31 2004-01-23 Procede et dispositif de determination du sens de deplacement d'un composant de palier a roulement

Country Status (6)

Country Link
US (1) US7263901B2 (fr)
EP (1) EP1623237A1 (fr)
JP (1) JP4626770B2 (fr)
CN (1) CN1751240B (fr)
DE (1) DE10303876A1 (fr)
WO (1) WO2004068146A1 (fr)

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DE102004027800B4 (de) * 2004-06-08 2006-04-06 Fag Kugelfischer Ag & Co. Ohg Verfahren und Computerprogramm zur Ermittlung von Betriebsparametern in einem Wälzlager sowie hiermit auswertbares Wälzlager
US7665372B2 (en) * 2005-04-27 2010-02-23 Jtekt Corporation Rolling bearing device with sensor and strain sensor
FR2893106B1 (fr) * 2005-11-09 2008-01-04 Snr Roulements Sa Roulement capteur de deformations comprenant au moins trois jauges de contrainte
JP5040266B2 (ja) * 2006-11-02 2012-10-03 トヨタ自動車株式会社 車輪の回転方向推定装置及び車輪の回転方向推定方法
JP5620509B2 (ja) * 2009-12-04 2014-11-05 アクティエボラゲット・エスコーエッフ ファイバー・ブラッグ・グレーティングを用いたベアリングの監視
US9546690B2 (en) * 2012-12-14 2017-01-17 Aktiebolaget Skf Fiber sensor assembly
US10697854B2 (en) 2016-05-25 2020-06-30 Hitachi, Ltd. Rolling bearing fatigue state prediction device and rolling bearing fatigue state predicting method
US10557504B1 (en) * 2019-01-22 2020-02-11 Hiwin Technologies Corp. Linear guideway capable of detecting abnormal circulation state
WO2023276365A1 (fr) * 2021-07-02 2023-01-05 ミネベアミツミ株式会社 Palier à roulement

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Also Published As

Publication number Publication date
DE10303876A1 (de) 2004-08-12
US7263901B2 (en) 2007-09-04
WO2004068146A1 (fr) 2004-08-12
US20060144164A1 (en) 2006-07-06
CN1751240A (zh) 2006-03-22
JP4626770B2 (ja) 2011-02-09
JP2006520464A (ja) 2006-09-07
CN1751240B (zh) 2010-10-06

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