WO2009053207A2 - Capteur, en particulier pour l'enregistrement d'une vitesse de rotation, et son procédé de fabrication - Google Patents

Capteur, en particulier pour l'enregistrement d'une vitesse de rotation, et son procédé de fabrication Download PDF

Info

Publication number
WO2009053207A2
WO2009053207A2 PCT/EP2008/062831 EP2008062831W WO2009053207A2 WO 2009053207 A2 WO2009053207 A2 WO 2009053207A2 EP 2008062831 W EP2008062831 W EP 2008062831W WO 2009053207 A2 WO2009053207 A2 WO 2009053207A2
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
magnet
sensor element
grid
stamped grid
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.)
Ceased
Application number
PCT/EP2008/062831
Other languages
German (de)
English (en)
Other versions
WO2009053207A3 (fr
Inventor
Lars Legler
Enrico Schliwa
Werner Otto
Tom Weghenkel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2009053207A2 publication Critical patent/WO2009053207A2/fr
Publication of WO2009053207A3 publication Critical patent/WO2009053207A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
    • 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
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/245—Housings for sensors
    • 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
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • 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
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

Definitions

  • the invention relates to a sensor, in particular for speed detection and a method for producing the same.
  • Sensors for speed detection are known from the prior art, having stamped grid arms, which are first encapsulated with plastic, for example thermoplastics, so as to form a holder.
  • plastic for example thermoplastics
  • This holder then takes on a magnet, a homogenizing and optionally a sensor element.
  • the sensor element may be part of an integrated circuit.
  • the electrical connection elements of the sensor element are connected to the stamped grid arms, for example by welding.
  • the components with a sheath made of plastic, such as thermosets surrounded.
  • Corresponding sensors are installed, for example, in the electronic module for the transmission control.
  • the different material pairing of, for example, thermoplastic and thermoset in operation due to the different expansion coefficients cause material stresses between the holder and the sheath.
  • the sensor according to the invention with the features of the appended claim 1 advantageously has a high density against liquids and a simple and inexpensive to manufacture overall construction. Due to the fact that the magnet and the homogenizing disk are fastened to the stamped grid by means of stamped grid arms of the stamped grid, it is possible to dispense with a separately produced plastic holder. An occurring due to material stresses between different plastics leakage of the housing is advantageously avoided.
  • the sensor element After the attachment of the magnet and the homogenizing disk on the stamped grid, which can be done, for example, by clamping, the sensor element is attached to the stamped grid and then produced a sheathing surrounding at least the sensor element, the magnet and the homogenization.
  • the magnet and the homogenizing disc form a stack, which is held between two punched grid sections.
  • the stack formed by the magnet and the homogenization disk is clamped on the stamped grid between the stamped grid sections. This simplifies the mounting of the sensor.
  • at least one stamped grid section can have a spring element which pretensions the stack formed by the magnet and the homogenizing disc against a second stamped grid section.
  • the magnet and / or the homogenizing are fixed potential-free.
  • the assembly of the sensor element on the stamped grid can advantageously be simplified in that the sensor element is laterally encompassed by at least two projections of the stamped grid at its circumference.
  • the sensor element is then advantageously secured in its position.
  • the sensor element is clamped between the projections.
  • the sheath is advantageously made of a plastic, in particular a thermosetting plastic.
  • Duroplast When using Duroplast as encapsulation only small forces act on the individual parts, whereby the possibility of slipping of the individual parts is reduced.
  • FIG. 1 is a schematic exploded view of a known sensor without encapsulation
  • FIG. 2 is a schematic representation of a first embodiment of a sensor according to the invention without a casing
  • 3a is a schematic representation of a second embodiment of an inventive sensor without wrapping
  • FIG. 3b shows another view of FIG. 3a without a homogenizing disk and magnets
  • FIG. 4 shows a schematic illustration of the sensor according to the invention with a casing. - A -
  • FIG. 1 shows a known sensor 10 without a jacket.
  • the sensor has a stamped grid with stamped grid tracks 11 for the electrical contacting of a sensor element 14.
  • the sensor element 14 is designed as an integrated circuit 14. Electrical connections of the sensor element 14 are welded onto the stamped lattice webs 11, for example.
  • a holder 15 made of plastic is further formed.
  • the plastic is, for example, a thermoplastic.
  • the holder 15 receives a magnet 12, a homogenizing disk 13 and the sensor element 14. To produce the holder 15, a separate manufacturing step is necessary.
  • the holder 15 is made for example by injection molding.
  • FIG. 2 shows a schematic representation of a first exemplary embodiment of the sensor 20 according to the invention without sheathing.
  • the sensor can be, for example, a sensor for detecting rotational speeds of an engine (crankshaft), for detecting rotational speeds in a transmission or for detecting wheel speeds.
  • the sensor may be an active sensor or a passive sensor.
  • a sensor is referred to as active in the context of the invention, if it is activated by applying a supply voltage and only then generates an output signal.
  • a sensor is called passive when it is operating without supply voltage.
  • the sensor can work according to the Hall principle (Hall effect). This has the advantage that the sensor can detect forward and backward movements. It is also possible that the sensor works due to magnetic induction.
  • the sensor can be part of an integrated circuit and be designed, for example, as a Hall IC chip.
  • the sensor 20 has a stamped grid 21 for electrically contacting the sensor element 14.
  • a stamped grid is a two-dimensional or three-dimensional network produced from a metal strip by punching.
  • the stamped grid can be encapsulated with plastic / encased.
  • the material of the stamped grid can contain CuSn ⁇ .
  • the lead frame material can be electrodeposited to provide adhesion enhancement to plastics.
  • Connection elements 141, 142 of the sensor element 14 are provided with stamped lattice webs the lead frame 21, for example, connected by welding.
  • the sensor element 14 can also be attached to the stamped grid in a detachable or non-detachable manner. This can be done for example by clamping, soldering, crimping and / or welding.
  • the punched grid 21 has an additional punched grid arm 22 which holds a magnet 12 and a homogenizing disk 13.
  • the additional punched grid arm 22 abuts the homogenizing disk 13 with a first punched grid section on the side of the magnet 12 facing away from the sensor element 14 and with a second punched grid section not visible in FIG. 2, whereby the magnet and the homogenizing disk are held directly on the stamped grid become.
  • This is preferably potential-free.
  • the magnet and the homogenizing disk can be galvanically separated from each other.
  • the magnet used preferably generates a stationary magnetic field. Under a homogenizing according to the invention a component for aligning or influencing the magnetic field understood.
  • the homogenizing disc may consist of a soft magnetic material or other suitable materials with which an alignment or influence of the magnetic field can be achieved.
  • FIG. 3 a shows a further exemplary embodiment of the sensor according to the invention without the sheathing.
  • the punched grid 21 has a U-shaped stamped grid section 210, to which three stamped grid arms 211, 212 and 213 are bent, which are bent away from the stamped grid section 210.
  • the stamped grid 21 has a further stamped grid section 214 on which a spring element 214a in the form of an elastically flexible tab is formed, as best seen in FIG. 3b.
  • the magnet 12 and the homogenizing disk 13 are inserted between the angled leadframe arms 211, 212 and 213 in such a way that the stamped grid section 214 with the spring element rests against the side of the magnet 12 facing away from the homogenization disk, while one on the rod support arm 212 formed punched grid section 215 abuts the side facing away from the magnet side of the homogenizing disk 13.
  • the stack consisting of the magnet 12 and the homogenizing disk 13 is thereby held directly on the stamped grid 21.
  • the punched grid sections 214 and 215 form a thrust bearing for the stack.
  • the lead frame exerts an elastic biasing force on the stack.
  • the sensor element 14 is mounted on the stamped grid.
  • the punched grid arms 211, 212 and 213 are bent endwise in the direction of the sensor element 14, whereby projections 216, 217 and 218 are formed, which laterally surround the sensor element 14 during its mounting on its circumference.
  • the projections 216 and 217 abut, for example, on sides facing away from each other on the circumference of the sensor element 14.
  • the sensor element 14 can be clamped in the projections, so that they generate a clamping force.
  • the terminals of the sensor element 14 are contacted with the stamped grid.
  • the stamped grid sections 211, 212 and 213 may have, in the middle of their longitudinal extent, bent portions towards the magnet, which abut an example, cylindrical outer wall of the magnet 12, so that it is also mounted in the radial direction.
  • FIG. 4 shows the sensor 20 wherein the sheath 31 encloses the magnet 12, the homogenizing disk 13, and the integrated circuit 14. For contacting purposes punched lanes of the lead frame 21 are led out of the sheath 31.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

L'invention concerne un capteur, en particulier pour des vitesses de rotation, comprenant : une grille estampée (21) comme support ; un aimant (12) pour produire un champ magnétique ; un disque d'homogénéisation (13) pour agir sur le champ magnétique ; un circuit intégré (14); et un enrobage (31). L'aimant (12) et le disque d'homogénéisation (13) sont fixés sur la grille estampée au moyen de parties (22, 214, 215) de celle-ci.
PCT/EP2008/062831 2007-10-25 2008-09-25 Capteur, en particulier pour l'enregistrement d'une vitesse de rotation, et son procédé de fabrication Ceased WO2009053207A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710050988 DE102007050988A1 (de) 2007-10-25 2007-10-25 Sensor, insbesondere zur Drehzahlerfassung, und Verfahren zur Herstellung desselben
DE102007050988.1 2007-10-25

Publications (2)

Publication Number Publication Date
WO2009053207A2 true WO2009053207A2 (fr) 2009-04-30
WO2009053207A3 WO2009053207A3 (fr) 2009-06-18

Family

ID=40490150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/062831 Ceased WO2009053207A2 (fr) 2007-10-25 2008-09-25 Capteur, en particulier pour l'enregistrement d'une vitesse de rotation, et son procédé de fabrication

Country Status (2)

Country Link
DE (1) DE102007050988A1 (fr)
WO (1) WO2009053207A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9612365B2 (en) 2011-12-23 2017-04-04 Johnson & Johnson Vision Care, Inc. Silicone hydrogels having desirable water content and oxygen permeability

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029265A1 (de) 2009-09-08 2011-03-10 Robert Bosch Gmbh Verfahren zur Herstellung eines Sensors
DE102010063614B4 (de) * 2010-12-21 2024-05-08 Zf Friedrichshafen Ag Verfahren zur Herstellung einer Sensorbaugruppe
DE102013226045A1 (de) * 2013-12-16 2015-06-18 Continental Teves Ag & Co. Ohg Mechanisch überbestimmt verbauter Drehzahlsensor mit elastischer Umspritzung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5963028A (en) * 1997-08-19 1999-10-05 Allegro Microsystems, Inc. Package for a magnetic field sensing device
DE102004061260A1 (de) * 2004-12-20 2006-06-29 Robert Bosch Gmbh Magnetfeldsensor
DE102005027767A1 (de) * 2005-06-15 2006-12-28 Infineon Technologies Ag Integriertes magnetisches Sensorbauteil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9612365B2 (en) 2011-12-23 2017-04-04 Johnson & Johnson Vision Care, Inc. Silicone hydrogels having desirable water content and oxygen permeability

Also Published As

Publication number Publication date
WO2009053207A3 (fr) 2009-06-18
DE102007050988A1 (de) 2009-04-30

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