WO2000045066A1 - Capteur pour la mesure en continu de pieces usees par frottement - Google Patents

Capteur pour la mesure en continu de pieces usees par frottement Download PDF

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Publication number
WO2000045066A1
WO2000045066A1 PCT/CZ2000/000003 CZ0000003W WO0045066A1 WO 2000045066 A1 WO2000045066 A1 WO 2000045066A1 CZ 0000003 W CZ0000003 W CZ 0000003W WO 0045066 A1 WO0045066 A1 WO 0045066A1
Authority
WO
WIPO (PCT)
Prior art keywords
wear
sensor
contacts
external contacts
internal signal
Prior art date
Application number
PCT/CZ2000/000003
Other languages
German (de)
English (en)
Other versions
WO2000045066A8 (fr
Inventor
Zdeněk ŘEZNĺČEK
Original Assignee
Reznicek Zdenek
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 Reznicek Zdenek filed Critical Reznicek Zdenek
Priority to DE10080247T priority Critical patent/DE10080247D2/de
Publication of WO2000045066A1 publication Critical patent/WO2000045066A1/fr
Publication of WO2000045066A8 publication Critical patent/WO2000045066A8/fr

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Classifications

    • 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
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/026—Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
    • F16D66/027—Sensors therefor

Definitions

  • the invention extends to the construction of a unique integrating ratio sensor for the continuous scanning of the instantaneous thickness or the total wear of the parts worn by the abrasion, the main use of which relates in particular to the continuous monitoring of the condition of the friction segments, particularly the brake lining.
  • the known unique sensors have a number of disadvantages, which include in particular:
  • Its essence is that it consists of a conductive contact system that contains two external contacts and at least one internal signal contact, which on the Surface of a temperature-resistant electrical insulation material can be stored.
  • the outer contacts and the inner signal contact are covered with a segment which is formed from a continuous flat resistance layer.
  • the contacts are arranged along the axis perpendicular to the plane of the beginning of wear of the wearing part so that the increases in the pair of distances of the internal signal contact are different from the external contacts, at least in two planes from the set of "k" planes, which are parallel and at the same time lie between the plane of the beginning of the wear and the load-bearing plane of the wear part, by which the thickness of the wear part is defined.
  • the described disposition of the contacts and their overlap with a flat resistance layer form an associated scanning transistor with two external contacts, which is divided at least by an internal scanning contact into two dependent, variable resistors.
  • the outer contacts together with the inner signal contact are covered with a flat width-resistant layer which is divided into at least two and / or more segments by transversely.
  • the total conductivity of the non-rubbed remainder of each variable resistor is ranked by the integral sum of the increases in the sensors, which start in parallel along the sensor axis, beginning with the level of wear, to the end of the segment of the resistance layer that is most distant. This is usually identical to the plane between the wear part holder and that part or a distant plane.
  • the common possibly the relative ratio of the two resistors to the basic electrical properties of the functional resistance layer independent, and is only dependent on the mutual geometric arrangement of the internal contact and the external contacts along the axis that are perpendicular to the plane of abrasion, only variable.
  • the output signal which is given by the common ratio of the two, rubbed together resistances between the given internal contact and the external contacts, possibly by the ratio of one of these to the total resistance of the two, is always of the basic electrical properties of the material Functional parts of the resistor
  • the output signal is only dependent on the geometry of the arrangement of the functional parts of the resistors of the sensor along the axis, which is perpendicular to the plane of the abrasion, i.e. on the geometry of the internal contact with respect to the external contacts - furthermore only geometry.
  • the output signal is, provided that the same temperature has long been at the sensor, independent of the temperature, even in the case when the surface resistance of the functional resistance layer, which covers the contacts, is not temperature-independent.
  • the shape of the output characteristic curve can be changed simply by changing the geometry of the corresponding internal contact of the sensor, for each of the possible internal contacts of one and the same sensor independently and independently, the high, achievable accuracy, which can only be achieved by the achievable accuracy of the geometry of the sensor can be influenced. particularly low and real definable non-linearity.
  • L ' maximum length of the functional part of the sensor (usually longer or identical to the initial thickness of the abraded wear part.
  • L initial thickness of the abraded wear part.
  • w active width of the functional resistors, which is given by the mutual distance of the parallel edge contacts a + b, is increased by the width of the inner signal contact w2, in the case of a multiple inner contact or multiple signal sensors
  • Figure 1 shows a unique single-signal wear sensor with a standardized characteristic curve, which is defined solely by the geometrical arrangement of the three contacts, which are covered with a flat resistance layer.
  • Figure 2 shows the unique sensor according to Figure 1, which is given in the wearing part.
  • Figure 4 shows the unique single-signal wear sensor with the standardized characteristic curve, the characteristic curve being defined solely by the geometric arrangement of the three contacts, which are covered with two segments of the flat resistance layer.
  • Figure 5 shows the unique sensor according to Figure 4, which is given in the wearing part.
  • Figure 6 shows the standardized output characteristic of the wear of the unique sensor according to Figure 4.
  • Figure 7 shows the unique single-signal sensor of wear with the standardized characteristic curve, the characteristic curve being defined solely by the geometric arrangement of the three contacts, which are covered with three segments of the flat resistance layer.
  • Figure 8 shows the unique two-signal wear sensor with two internal signal contacts.
  • Figure 9 shows the standardized output characteristic of wear of the two-signal sensor according to Figure 8.
  • the unique sensor 1, as shown in Figure 1, is formed so that a conductive contact system 3 with three contacts, which are defined as the first external contact 3 _, the internal scanning contact 3 2, and the second external contact 3 3, on a flat against temperature resistant electrical insulation substrate 2 with the technology, for example a thick layer, is formed.
  • the contacts 3., 32 and 3 3 are covered over a large area with a resistance layer, which forms the segment 4, and are arranged along the longitudinal axis 5, which is perpendicular to the plane 6 of the beginning of wear, so that the inner signal-sensing contact 3 , 2 moves monotonously away from the beginning of the wear level 6 from the first external contact 3J_ and at the same time approaches monotonously towards the second external contact 3 5, whereby between the external contacts 3 [and 3 5 on the surface of the overlap by the resistance layer, which is from the segment 4 is formed, a resistor is formed, which is divided by the inner signal contact 3J2 at two dependent conjugated resistors -
  • Figure 2 shows the unique sensor 1, according to Figure 1, installed in the wear part Ifj.
  • the body of the unique sensor 1, provided with cables with switching conductors 7, which are connected e.g. High-temperature solder metal to be soldered to the soldering surfaces of the contacts 3 ⁇ _ to 3.3 is placed in a brass housing 8, and is fixed there with a suitable electrical insulation filler with suitable wear properties.
  • the brass housing is set in the holder V ⁇ _ of the wearing part 10 so that the starting points and the end points of the functional part of the sensor 1 are coordinated with the levels determining the width of the wearing part, i.e. with the level 6 of the start of wear and with the load-bearing level 9 of the contact of the wear part 10 with its holder H, to which it is connected with e.g. Thread is fixed.
  • the standardized output characteristic of the one-time sensor 1, according to Figure 1 for the ratio a / b ⁇ 1, is shown in Figure 3.
  • the characteristic curve shows the dependency of the ratio Y (z) of the output voltage U ou t to the connection voltage Uj n and also the relative ratio of the resistors R-
  • the characteristic curve shows the dependence of the ratio Y (z) of the output voltage U ou t on the supply voltage Uj n and also the relative ratio of the resistors R12 and B.23 on the relative shortening of the one-time sensor and the abraded one Part 10 in the reverse polarity of the supply voltage.
  • Fig. 4 one of the favorable embodiments of the invention is shown, in which it is assumed that the contacts 3 1_, 3 ⁇ 2, and 3.3, which together with a flat resistance layer divided into two segments 4 ⁇ _ and 4 ⁇ 2, cover are, the segment 42 is outside the rubbed part of the sensor 1.
  • the arrangement of the sensor 1 of this embodiment in the body of the wearing part 10 is shown in Figure 5.
  • the standardized output characteristic of the wear of the unique sensor according to Figure 4 for all ratios a / b is shown in Figure 6.
  • the characteristic curve represents just that as in the previous cases, the dependency of the output voltage U ou t on the connection voltage Uj n on the wear of the wear part 10.
  • the addition of the segment 42, the contacts 3 _, 3 ⁇ 2, and 3.3 outside of the worn part of the unique sensor covered, causes a jump change in the output signal in the vicinity of the end of wear, which can advantageously be used to clearly signal the critical rest of the wear part 10.
  • Figure 7 shows another of the possible embodiments of the invention, in which it is assumed that the contacts contacts 3 _, 32, and 3 3, which are divided into three segments 4_ 4.2, 4.2.1, and 4.2.2 flat resistance layer are covered, with the segments 4.2.1 and 4.2.2 lying outside the worn part of the sensor l.
  • the output characteristic of the unique sensor 1 of wear will be analogous to the characteristic shown in Figure 6, so that the constant level of the output signal in the end band of the characteristic is given solely by the geometric arrangement of segments 4.2.1 and 4.2.2 .
  • Figure 8 shows one of the favorable designs of the invention, in which a division of the resistor by two internal contacts 3.2.1 and 3.2.2 on three mutually dependent resistors R-
  • the unique integrating ratio sensor according to the invention can be used wherever it is suitable to continuously monitor the condition of the worn components of a transmission over its entire technical lifespan, especially where it is necessary due to the to anticipate the actual wear and tear of the rest of the service life, to ensure that the critical remnant is signaled or to initiate a certain regulatory measure.
  • it can be used for continuous operational control of the condition of the brake shoes and other pads.
  • analog friction mechanisms are used to transfer the torque from the driving to the driven units.
  • the evaluation also lends itself to material testing centers, where the need to interrupt the wear tests, which is eliminated by physical measurements to determine the actual thickness of the abraded material, and what's more, a continuous dependency will be gained directly, without the need for aproximation of the originally discrete measurement results.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un capteur pour l'exploration en continu de pièces d'usure usées par frottement. Ce capteur est constitué d'un système de contacts (3) conducteur qui contient deux contacts extérieurs (3.1) et (3.3) et au moins un contact de signalisation (3.2) intérieur qui sont montés sur la surface d'un substrat électro-isolant (2) résistant aux températures élevées. Les contacts extérieurs (3.1) et (3.3) et le contact de signalisation (3.2) intérieur sont recouverts d'un segment (4) qui forme une couche de résistance plate continue. Les contacts (3.1), (3.2) et (3.3) sont disposés de telle sorte que les deux écartements (V1,2) et (V2,3) du contact de signalisation (3.2) par rapport aux contacts extérieurs (31) varient de façon non linéaire au moins dans une zone, lorsque l'usure augmente.
PCT/CZ2000/000003 1999-01-27 2000-01-27 Capteur pour la mesure en continu de pieces usees par frottement WO2000045066A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10080247T DE10080247D2 (de) 1999-01-27 2000-01-27 Sensor zur kontinuierlichen Messung von Reibungsverschleiss

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV277-99 1999-01-27
CZ1999277A CZ291191B6 (cs) 1999-01-27 1999-01-27 Jednorázový integračně poměrový senzor pro průběľné snímání stavu otěrem opotřebovávaných součástí

Publications (2)

Publication Number Publication Date
WO2000045066A1 true WO2000045066A1 (fr) 2000-08-03
WO2000045066A8 WO2000045066A8 (fr) 2001-05-31

Family

ID=5461485

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2000/000003 WO2000045066A1 (fr) 1999-01-27 2000-01-27 Capteur pour la mesure en continu de pieces usees par frottement

Country Status (3)

Country Link
CZ (1) CZ291191B6 (fr)
DE (1) DE10080247D2 (fr)
WO (1) WO2000045066A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2823278A1 (fr) * 2001-04-04 2002-10-11 Akebono Brake Ind Dispositif indicateur de duree de vie d'un element de frein de vehicule, et procede pour sa reparation
US7677079B2 (en) 2004-02-27 2010-03-16 Mcgill University Method and device for sensing wear

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57144402A (en) * 1981-03-02 1982-09-07 Akebono Brake Ind Co Ltd Sensor for detecting abrasion loss of brake lining
FR2574508A1 (fr) * 1984-12-11 1986-06-13 Renault Detecteur d'usure de garniture de friction
DE3915996C1 (en) * 1989-02-21 1990-06-28 Leopold Kostal Gmbh & Co Kg, 5880 Luedenscheid, De Vehicle brake limiting wear sensor - has thick-film resistor on ceramic substrate fixed in opening of brake lining
DE4231107A1 (de) * 1992-09-17 1994-03-24 Bosch Gmbh Robert Sensor zur Bestimmung der Belagdicke und gleichzeitig der Temperatur von Bremsbelägen von Bremsen, insbeondere von Kraftfahrzeugen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57144402A (en) * 1981-03-02 1982-09-07 Akebono Brake Ind Co Ltd Sensor for detecting abrasion loss of brake lining
FR2574508A1 (fr) * 1984-12-11 1986-06-13 Renault Detecteur d'usure de garniture de friction
DE3915996C1 (en) * 1989-02-21 1990-06-28 Leopold Kostal Gmbh & Co Kg, 5880 Luedenscheid, De Vehicle brake limiting wear sensor - has thick-film resistor on ceramic substrate fixed in opening of brake lining
DE4231107A1 (de) * 1992-09-17 1994-03-24 Bosch Gmbh Robert Sensor zur Bestimmung der Belagdicke und gleichzeitig der Temperatur von Bremsbelägen von Bremsen, insbeondere von Kraftfahrzeugen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 248 (P - 160) 7 December 1982 (1982-12-07) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2823278A1 (fr) * 2001-04-04 2002-10-11 Akebono Brake Ind Dispositif indicateur de duree de vie d'un element de frein de vehicule, et procede pour sa reparation
US7677079B2 (en) 2004-02-27 2010-03-16 Mcgill University Method and device for sensing wear

Also Published As

Publication number Publication date
CZ27799A3 (cs) 2000-08-16
CZ291191B6 (cs) 2003-01-15
DE10080247D2 (de) 2002-01-24
WO2000045066A8 (fr) 2001-05-31

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