EP2475999A1 - Procédé de fabrication d'un capteur - Google Patents

Procédé de fabrication d'un capteur

Info

Publication number
EP2475999A1
EP2475999A1 EP10734743A EP10734743A EP2475999A1 EP 2475999 A1 EP2475999 A1 EP 2475999A1 EP 10734743 A EP10734743 A EP 10734743A EP 10734743 A EP10734743 A EP 10734743A EP 2475999 A1 EP2475999 A1 EP 2475999A1
Authority
EP
European Patent Office
Prior art keywords
sensor
holder
homogenizing
stamped grid
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.)
Withdrawn
Application number
EP10734743A
Other languages
German (de)
English (en)
Inventor
Frank Mai
Steffen Waldenmeier
Uwe Katzenwadel
Martin Gerhaeusser
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 EP2475999A1 publication Critical patent/EP2475999A1/fr
Withdrawn legal-status Critical Current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
    • 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

  • sensors for detecting various physical and / or chemical parameters are known in the prior art.
  • An important example of such sensors are magnetic sensors, which can be used for example in automotive technology and in particular for speed detection.
  • Such speed sensors are described for example in Robert Bosch GmbH: sensors in the motor vehicle, edition 2007, pages 1 14 to 123.
  • a magnetic field generated and / or influenced by a transmitter wheel and / or its changes are detected by means of a sensor.
  • sensor elements are used in the sensors, which detect the magnetic field and / or its changes, for example Hall sensors or other types of sensor elements.
  • homogenization disks are used in many sensors, in particular for speed detection, ie elements, for example feromagnetic or soft magnetic elements, which have a local profile of the magnetic field and, for example, can amplify a component of the magnetic field perpendicular to a sensor surface of a sensor element.
  • magnets are partially used in such sensors, for example permanent magnets.
  • Magnets are required, for example, when a purely metallic encoder wheel, without its own magnetic poles, is used as a donor wheel, for other applications, such as applications with Magnetpol wheels, however, not.
  • One and the same sensor must therefore be provided in many cases in different embodiments, which greatly increases the production and storage costs.
  • a sensor is known, which can be used in particular for speed detection. This has a sensor element and a punched grid for electrical contacting thereof and a magnet for generating a magnetic field and a homogenizing disk for influencing the magnetic field.
  • At least one jacket surrounding the sensor element, the magnet and the homogenizing disk is provided, wherein the magnet and the homogenizing disk are fastened to the stamped grid by means of stamped grid sections.
  • the sensor can be used in particular for speed detection, in particular in the automotive sector.
  • the sensor can be used for example for detecting rotational speeds of an engine, in particular a crankshaft, for detecting rotational speeds in a transmission or for detecting wheel speeds.
  • the sensor may be an active or a passive sensor, wherein 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 operate according to the Hall principle, that is to say comprise at least one sensor element which operates according to the Hall principle. Basically, however, alternatively or additionally, other types of sensor elements can be used.
  • a stamped grid in the sense of the invention can basically be any body which is designed to conduct an electric current or electrical signals.
  • this punched grid can be a two-dimensionally manufactured from at least one, preferably two or more metal strips with a polygonal, in particular rectangular or round cross-section. or three-dimensional network, preferably a dimensionally stable network act, which may be generated for example by punching.
  • the stamped grid may also comprise one or more flexible or plastic conductors.
  • the stamped grid can also comprise one or more flexible printed circuit boards or flexible lines, for example at least one printed circuit foil.
  • the stamped grid may already be partially encapsulated and / or encased with plastic, or, alternatively or additionally, this may optionally be done later.
  • the material of the stamped grid can comprise, for example, CuSn6.
  • the stamped grid material can be galvanically coated, for example, in order to bring about an improvement in the adhesion with plastics, whereby in particular a seal against aggressive surrounding media, for example transmission fluid (ATF), can be ensured. This point will be explained in more detail below.
  • ATF transmission fluid
  • the punched grid is used for electrical contacting of the sensor, in particular a sensor element of the sensor, for example a Hall IC.
  • the contacting of the sensor element for example, by a cohesive connection with the
  • Punching grid done, for example, a welding and / or soldering. Alternatively or additionally, however, non-positive or positive connections can be used, for example, crimping.
  • the optional application and / or introduction of the sensor element and / or its electrical connection to the stamped grid can be carried out before, during or after the described method steps.
  • At least one homogenizing disk is provided for influencing a magnetic field.
  • this magnetic field can be generated externally, for example by a magnetic pole wheel, or, alternatively or additionally, also be generated by a magnet of the sensor itself, for example a permanent magnet, and be influenced only by a sender wheel, for example.
  • the homogenizing disk may in particular have a disk shape, for example a circular disk shape or a shape of a polygonal disk, although fundamentally any configurations of the homogenizing disk are possible, such that the magnetic field is influenced locally, in particular such that a magnetic field component perpendicular to a surface of the Sensor element is increased.
  • the stamped grid and the homogenizing disk are connected via at least one holder, wherein the holder fixes the stamped grid and the homogenizing disk in a form-fitting and / or material-locking manner.
  • the holder may have at least one plastic component, wherein the stamped grid and the homogenizing disc are at least partially embedded in the plastic component, preferably encapsulated.
  • the stamped grid and the homogenizing disk can be at least partially surrounded, in particular encapsulated, by a plastic of the holder, in particular in a plastic molding process, in particular in a single method step, whereby the holder is at least partially formed.
  • Elements of the holder may optionally be formed prior to said forming step.
  • a two-platen injection mold can be used, that is to say an injection molding tool which can be used, for example, for an injection molding process or another plastic molding process and in which at least two parts to be injection-molded can be completely or partially inserted.
  • the homogenizing disk and the stamped grid can then be introduced at least partially into at least one mold cavity of the two-platen molding tool, preferably into the same mold cavity, and at the same time be at least partially encapsulated by the plastic.
  • a thermoplastic material can be used.
  • other types of plastics can also be used, for example duromers, which can be processed, for example, in a transfer molding process.
  • the punched grid and / or the homogenizing disk can each be provided in one use, that is to say in an element which comprises a plurality of homogenizing disks or a plurality of stamped grids.
  • a frame may be provided which is made, for example, from the homogenizing disk material and / or from the stamped grid material and which is connected to the homogenizing disks or the stamped grid, for example via bridges.
  • a separation from the use can then take place, for example in a stamping process.
  • the stamped grid and / or the homogenizing disk can be coated in particular with an adhesion-promoting layer for improving adhesion of a material of the holder, in particular of a plastic material. On In this way, as described above, a media tightness of the encapsulation can be increased, in particular against transmission fluids, fuels, oils or the like.
  • the holder may in particular be shaped such that it has a receptacle for a magnet of the sensor, in particular one or more cavities for receiving such a magnet, preferably a permanent magnet.
  • This recording can be generated for example in the said plastic molding process with and / or in a separate process step.
  • the receptacle is preferably designed such that the magnet can be subsequently introduced, so that, for example, optionally sensors can be made with or without a magnet. Accordingly, the use of spacers which have the form of magnets and which in many cases are used in conventional sensors when no magnet is to be used (so-called "dummy magnets”) can be dispensed with , so it can be easily and quickly inserted into the recording.If no magnet is needed, the recording can remain empty.
  • the receptacle may in principle have one or more holding elements for holding the magnet, for example latching and / or other non-positive and / or positive holding elements.
  • the receptacle can also be designed such that the magnet is held by a magnetic force directly or indirectly on the homogenizing disk in the receptacle.
  • the sheathing of the homogenizing disk with the plastic material may take place such that the homogenizing disk is at least partially exposed towards the interior of the receptacle, so that the magnet can adhere directly to the homogenizing disk.
  • a thin intermediate layer is also possible in principle.
  • the method may comprise further method steps not mentioned so far.
  • at least one sensor element can furthermore be connected to the stamped grid, in particular at least one magnetic sensor, preferably at least one Hall sensor. This can in particular be electrically connected to corresponding contacts of the stamped grid in order to contact the sensor element electrically.
  • a sensor is further proposed, which in particular can be produced according to the proposed method in one or more of the illustrated embodiments, which, however, can be prepared in principle in other ways.
  • the sensor comprises at least one stamped grid for electrically contacting the sensor, in particular a sensor element of the sensor.
  • the sensor comprises at least one homogenizing disk for influencing a magnetic field, wherein the homogenizing disk is formed separately from the stamped grid and is connected to the stamped grid via at least one holder. The holder fixes the stamped grid and the homogenizing disk positively and / or cohesively.
  • the proposed method and the proposed sensor have numerous advantages over known methods and sensors.
  • the method can be carried out without using a placeholder magnet (that is to say a dummy magnet), so that a corresponding tool for producing a dummy magnet can be dispensed with.
  • a method step of assembly and alignment of the homogenization sheet can be omitted.
  • the process can thereby be considerably simplified, it is possible to save process steps compared to known processes, and the process can be designed overall more cost-effectively. Since no dummy magnets must be held and / or different sensors with and without magnet must be held, also a warehousing and logistics can be simplified as a whole.
  • FIGS. 1 A to 1 D method steps of a conventional production method for producing a sensor
  • FIGS. 2 A to 2 C method steps of a production method according to the invention.
  • FIGS. 1 A to 1 D show a method for producing a sensor 110 for detecting rotational speed known to the inventors of the present application. This hypothetical state of the art is assumed below. In FIGS. 1 A to 1 D, some relevant method steps of the production method are shown by way of example.
  • firstly homogenizing disks 12 are provided in a utility 14.
  • this benefit may include a punched strip 16.
  • These homogenizing disks 1 12 are connected to a magnet or, optionally, as shown in FIGS. 1 B to 1 D, with a placeholder, which corresponds to a magnet from its outer dimensions and is referred to below as "dummy magnet" 1 18
  • dummy magnet As shown in Figure 1 B, these dummy magnets 1 18 are produced by molding the homogenizing disks 1 12 with a plastic material by injecting the homogenizing disks 1 12 into this plastic material, followed by separating the dummy magnets 1 18 thus produced from the punching strip 16 (not shown).
  • punched grids 120 are provided, which are used for contacting the sensor 10. NEN. These are partially encapsulated in a separate, not shown process step with plastic, so that inter alia, a holder 122 for receiving the magnet or the dummy magnet 1 18 is formed. As can be seen in FIG. 1C, this holder 122 has at its lower end a receptacle 124 in the form of a cavity into which, as indicated in FIG. 1C by the arrow 126, the dummy magnet 1 18 or, optionally , a magnet can be mounted.
  • the holder 122 has at its upper end a sensor receptacle 128, in which a not shown in the figures sensor element of the sensor 1 10 can be inserted.
  • the finished assembled intermediate product with the dummy magnet 1 18 and the holder 122 is shown in Figure 1 D. This can be followed by further process steps, such as a mounting of the sensor element.
  • FIGS. 1 A to 1 D thus provides a universally usable ASIC holder with an overmolded stamped grid 120.
  • a magnet or a dummy magnet 1 18 including Homogenticiansscale 1 12 are inserted.
  • the sensor element for example in the form of an ASIC, be mounted, and it can be a further encapsulation, for example, an ATF-tight encapsulation.
  • the above-mentioned ATF-tight encapsulation offers equally good adhesion properties to the stamped grid material and a thermal expansion coefficient close to that of the stamped grid material.
  • FIGS. 1A to 1D show method steps of a method according to the invention
  • a benefit of homogenizing disks 12 is provided.
  • at least one stamped grid 120 is provided, it also being possible to provide a plurality of stamped grid 120 simultaneously, for example in a utility not shown in FIG. 2B.
  • the benefit 1 14 and the lead frame 1 12 can be inserted into a two-platen molding tool, not shown in the figures. Subsequently, these elements, as can be seen in Figure 2 B, overmolded with a plastic 130, so that a holder 122 is formed.
  • the punched grid 120 and the homogenizing disk 1 12 are fixed at the same time by one and the same element, namely the holder 122, by extrusion coating.
  • the homogenizing disk 1 12 for sensors 1 10 with and without magnet can be unified so that the holder 122 can be used for both possible applications.
  • an emanating or separating from the stamped strip 16 can take place, so that the intermediate product of FIG. 2C
  • the homogenizing disk 1 12 is now injected directly into the holder 122.
  • the holder 122 can still, analogously to the exemplary embodiment in FIG. 1D, comprise a receptacle 124, for example analogously to the example in FIG. 1D, in which optionally a magnet, for example a permanent magnet, can be inserted.
  • a magnet for example a permanent magnet
  • the receptacle 124 remains empty.
  • the dummy magnet 1 18 can be omitted, and it can be summarized several assembly steps, for example, the assembly of the homogenizing discs 1 12 and the assembly of the punched grid 120. Furthermore, can also realize savings from the tool side, for example, the injection mold for the dummy magnet 1 18 can be omitted. Also, the manufacturing risk can be reduced by reducing the manufacturing steps and the handling operations, in particular by avoiding a supply of the dummy magnet 1 18 and / or a positioning or a press-fitting thereof. A storage can be simplified because, for example, dummy magnets 1 18 need not be kept.
  • the magnet must be removed from its dimensions are no longer exactly adapted to the dimensions of the receptacle 124, and the magnet does not necessarily have to be pressed into the holder 122.
  • the magnet can be held by its own magnetic force on the homogenizing disk 12.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un capteur (110), notamment pour détecter la vitesse de rotation. À cet effet, une grille estampée (120) servant à la mise en contact électrique du capteur (110), notamment d'un élément du capteur (110) est préparée, ainsi qu'au moins un disque d'homogénéisation (112) destiné à influencer un champ magnétique, la grille estampée (120) et le disque d'homogénéisation (112) étant reliés par au moins un dispositif de retenue (122). Le dispositif de retenue (122) fixe la grille estampée (120) et le disque d'homogénéisation (112) par complémentarité de forme et/ou par liaison de matière.
EP10734743A 2009-09-08 2010-07-21 Procédé de fabrication d'un capteur Withdrawn EP2475999A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910029265 DE102009029265A1 (de) 2009-09-08 2009-09-08 Verfahren zur Herstellung eines Sensors
PCT/EP2010/060555 WO2011029653A1 (fr) 2009-09-08 2010-07-21 Procédé de fabrication d'un capteur

Publications (1)

Publication Number Publication Date
EP2475999A1 true EP2475999A1 (fr) 2012-07-18

Family

ID=43032943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10734743A Withdrawn EP2475999A1 (fr) 2009-09-08 2010-07-21 Procédé de fabrication d'un capteur

Country Status (6)

Country Link
US (1) US8863576B2 (fr)
EP (1) EP2475999A1 (fr)
KR (1) KR20120083312A (fr)
CN (1) CN102483425B (fr)
DE (1) DE102009029265A1 (fr)
WO (1) WO2011029653A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2674764A1 (fr) * 2012-06-13 2013-12-18 Aktiebolaget SKF Procédé de production d'une unité de détection, unité de capteur et roulement instrumenté comprenant une telle unité de détection
US9244090B2 (en) 2012-12-18 2016-01-26 Trail Tech, Inc. Speed sensor assembly
DE102014210480A1 (de) * 2014-06-03 2015-12-03 Robert Bosch Gmbh Kunststoff umspritztes Stanzgitter mit Haftmaterial

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053046A (en) 1995-02-09 2000-04-25 Denso Corporation Rotational speed detector for vehicle wheel with sensor device and integrally formed axle cover
DE102004060297A1 (de) 2004-12-15 2006-06-22 Robert Bosch Gmbh Magnetsensoranordnung
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
DE102007050988A1 (de) 2007-10-25 2009-04-30 Robert Bosch Gmbh Sensor, insbesondere zur Drehzahlerfassung, und Verfahren zur Herstellung desselben
DE102009000428A1 (de) 2009-01-27 2010-07-29 Robert Bosch Gmbh Verfahren zur Herstellung eines Sensors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011029653A1 *

Also Published As

Publication number Publication date
CN102483425A (zh) 2012-05-30
KR20120083312A (ko) 2012-07-25
WO2011029653A1 (fr) 2011-03-17
US8863576B2 (en) 2014-10-21
DE102009029265A1 (de) 2011-03-10
CN102483425B (zh) 2014-03-12
US20120125106A1 (en) 2012-05-24

Similar Documents

Publication Publication Date Title
EP2211396B1 (fr) Procédé de fabrication d'un capteur
WO2005085875A1 (fr) Capteur de mouvement et procede de realisation
WO1997036729A1 (fr) Capteur en plastique et son procede de fabrication
EP2223125B1 (fr) Élément de détection de champ magnétique
WO2007023058A1 (fr) Capteur de vitesse de rotation pouvant etre monte a hauteur variable sur une plaque de support
DE102012203222A1 (de) Gehäuseteil für eine Antriebseinheit, sowie Verfahren und Werkzeug zur Herstellung eines solchen
DE102006046984A1 (de) Verfahren zur Herstellung eines Trägerelements mit einem Winkelsensor
DE102008043639A1 (de) Sensoreinrichtung zum Erfassen der Drehlage einer rotierenden Welle
DE102013214915A1 (de) Verdrahtungseinrichtung zum Verdrahten einer elektronischen Vorrichtung
DE102012203946A1 (de) Elektrische Maschine zum motorischen Verstellen beweglicher Teile im Kraftfahrzeug, sowie Verfahren zum Herstellen der elektrischen Maschine
WO2011029653A1 (fr) Procédé de fabrication d'un capteur
DE102008061926A1 (de) Langgestrecktes Metallelement zur Einspritzung in ein Bauteil
EP3009811B1 (fr) Système de capteur et procédé de fabrication d'un système de capteur
DE10236700B4 (de) Vorrichtung zur Halterung und Fixierung einer Sensorvorrichtung in einem Gleichstrommotor
WO2009053207A2 (fr) Capteur, en particulier pour l'enregistrement d'une vitesse de rotation, et son procédé de fabrication
DE102010063614B4 (de) Verfahren zur Herstellung einer Sensorbaugruppe
DE102016203560A1 (de) Sensormodul für einen Aktor mit verschiebbarem Anker sowie Aktoranordnung
DE102011003239A1 (de) Sensormodul, Montageelement und Verfahren zum Herstellen eines Sensormoduls
EP3507438A1 (fr) Ensemble poignée de porte de véhicule à moteur doté d'une antenne
EP3510611B1 (fr) Dispositif de réglage électromagnétique destiné notamment au déphasage d'arbre à cames
DE102019218246A1 (de) Abtriebselement einer elektromotorischen Antriebseinheit, sowie Verfahren zum Herstellen eines solchen
DE102012106080A1 (de) Verbesserte Struktur eines Gleichstrom-Getriebeelektromotors, insbesondere für Fensterheber, Sitze, Scheibenwischer und andere Anwendungen in Fahrzeugen
DE102017219891A1 (de) Umspritzverfahren für eine Sensoreinheit
WO2018046051A1 (fr) Support de composants pour composants électriques/électroniques, destiné à se monter dans une serrure de porte de véhicule automobile
DE102008012781A1 (de) Elektromagnetisches Ventil

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120410

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20161223

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170503