WO1996026574A1 - Commutateur a circuit integre differentiel a effet de hall pour la detection sans contact de la position, notamment pour vehicules a moteur - Google Patents

Commutateur a circuit integre differentiel a effet de hall pour la detection sans contact de la position, notamment pour vehicules a moteur Download PDF

Info

Publication number
WO1996026574A1
WO1996026574A1 PCT/DE1996/000219 DE9600219W WO9626574A1 WO 1996026574 A1 WO1996026574 A1 WO 1996026574A1 DE 9600219 W DE9600219 W DE 9600219W WO 9626574 A1 WO9626574 A1 WO 9626574A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
hall
difference
switch according
hall sensors
Prior art date
Application number
PCT/DE1996/000219
Other languages
German (de)
English (en)
Inventor
Luc Jansseune
Dmitri Meulemeester
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU46631/96A priority Critical patent/AU4663196A/en
Publication of WO1996026574A1 publication Critical patent/WO1996026574A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/9517—Proximity switches using a magnetic detector using galvanomagnetic devices
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/9505—Constructional details

Definitions

  • the invention relates to a switch with a Hall difference IC, which has at least two Hall sensors arranged next to one another and at least one evaluation circuit, as well as with a permanent magnet which is arranged underneath the two Hall sensors and which has a pole faces the two Hall sensors, and whose field lines pass through the Hall sensors, a magnetic flux difference between the two Hall sensors being determined via the evaluation circuit and a switching signal being derived from a change in this difference when a ferromagnetic triggering part approaches.
  • the main component of such a switch is a Hall sensor, which is known to consist in principle of a semiconductor layer with high electron mobility, which is supplied with a constant current. When a transverse magnetic field is applied, the constant current is influenced and a Hall voltage is supplied which is proportional to the transverse magnetic field strength present.
  • the Hall sensor and evaluation circuit can be integrated together as an integrated circuit (IC) on a chip.
  • IC integrated circuit
  • the microswitches intended for use in the automotive body area are subject to high demands with regard to their switching range: For example, high switching distances of approx. 4 mm are required for vehicle door locks in order to compensate for the tolerances that occur, on the other hand the switch should be only a few millimeters of course no longer switch larger distance, which is defined by the pre-latching division of the rotary latch of a door lock.
  • the relatively large switching distances between the sensor and the triggering part required here can in principle either be achieved by switches which contain a Hall sensor and at least two magnets and are therefore complex, or by an arrangement of only one permanent magnet and a Hall difference ensuring sufficient sensitivity -IC can be realized.
  • a ferromagnetic adjustment plate is fixedly arranged opposite the permanent magnet in the area of a first Hall sensor, that a difference in the magnetic induction that is predetermined thereby is used as a rest is fixed and that a reduction of this difference when the ferromagnetic body approaches the second Hall sensor is evaluated as the switch-on state. It is therefore not adjusted to zero difference, rather a magnetic flux difference is specified with the adjusting plate, which difference is made to disappear or topple over when the trigger body approaches.
  • the object of the present invention is to provide a switch of the type mentioned at the outset, which enables a clear distinction between two switching states, that is to say an on and off state, and which is even smaller or simpler than the known switches .
  • this is achieved in that the sensor axis of the IC is arranged obliquely with respect to the active surface of the switch, to which the triggering element is approximated, and that when the triggering part approaches the Hall sensor which, due to the oblique arrangement, is one closer distance to the active surface than the other Hall sensor has, the resulting magnetic flux difference is evaluated as the switch-on state.
  • FIG. 1 shows schematically the structure of the switch according to the invention
  • FIG. 2 shows a sectional side view of the switch
  • FIG. 3 shows a circuit block diagram for an evaluation circuit that can be used in a switch according to the invention
  • FIGS. 4A and B show two versions of a switch mounted in a housing
  • FIG. 5 shows a sectional side view of a switch integrated in the striker of a motor vehicle door switch
  • FIG. 6 shows a top view of a rotary latch which interacts with the locking wedge according to FIG. 5,
  • FIG. 7A shows a plan view of a locking wedge according to FIG. 5, as well as various sections 7B, 7C and 7D from FIG. 7A.
  • the Hall difference IC 4 consists of a first Hall sensor 1, a Hall sensor 2 arranged next to it, and an evaluation circuit 3 arranged between them. Between the underside of the IC 4 and the one below it Permanent magnet 5 is arranged for the homogenization and divergence of the magnetic field from a nickel-iron material, known per se pole plate 6.
  • the inclination of the IC 4 according to the invention can advantageously be achieved in that the arrangement according to FIG. 1 is encapsulated or injected obliquely in an insulating material housing 7.
  • the IC 4 forms an angle of approximately 30 ⁇ 5 ° to the active surface 11 of the switch, which runs parallel to the switch-side end face of the trigger body 8.
  • the sensor axis of the IC which is formed by an imaginary connecting line of the two Hall sensors running parallel to the pole face of the permanent magnet, is not shown.
  • the dotted line represents the magnetic flux profile without triggering part 8, but the dashed line shows the magnetic flux profile with triggering part 8.
  • the IC is switched off. If a ferromagnetic release part comes close to the Hall sensor 2, the magnetic field is raised at the proximity point.
  • the trigger part 8 as shown in FIGS. 2 and 6, is usually flat on its side facing the active surface and is at least similar in size to the IC 4, the desired asymmetrical magnetic flux profile remains even when the trigger part is arranged in the center 8 received over the IC 4.
  • a point-specific trigger part that does not occur in practice would indeed cause a symmetrical field distortion at one point when moving over the IC 4, but this would not have the effect of a vanishing magnetic flux difference, since the dome-shaped trigger area of the Hall sensor 1 lies below the triggering part due to the inclination, so that it does not get into it.
  • the Hall difference circuit shown in FIG. 3 with two inputs and one output, only positive magnetic flux differences are evaluated.
  • an inexpensive proximity switch based on Hall generators can be realized. Due to the sensitive Hall difference arrangement, switching distances of more than 4 mm can be achieved with a very low susceptibility to interference from external influences.
  • FIGS. 4A and 4B each show an arrangement according to FIG. 1 which is fastened obliquely in an insulating material housing 7.
  • the dome-shaped triggering area 9 is also indicated in each case.
  • the switch is adjusted so that a switching signal is generated from on to off or vice versa when a triggering part is brought into this triggering area 9 or leaves it.
  • the connections of the microswitch are realized by means of a stamping board 10 (lead frame), which is only shown in FIG. 4B.
  • the IC 4 is either welded to the die-cut board in its protective form, as shown in FIG. 4A, or bonded in a bare, unhoused form, as shown in FIG. 4B.
  • the other end of the stamping board 10 can take various connection forms, such as plug-in connection, solder pins, soldering lugs, insulation displacement connection, etc.
  • the pole plate 6 can be replaced by an iron plating on the back of the stamping plate 10.
  • the magnet 5, like the chip 4, can be glued to the die-cut board.
  • a particularly advantageous application of the microswitch according to the invention results if it is attached to the striker of the door lock of a motor vehicle door and if the trigger body is formed by the associated rotary latch of the door lock, the final latching position of which can be queried by the microswitch.
  • 5 shows a bow-shaped striker 12 with a plastic cover 13 and an integrated microswitch. The striker
  • the microswitch is activated by the rotary latch 14 made of steel actuated the door lock, as shown in more detail in FIG.
  • the rotary latch 14 is provided with a trigger tooth 15 especially for the micro switch. This tooth 15 ensures an even greater magnetic flux difference in the Hall sensors. This results in a considerably increased difference in magnetic flux compared to a straight actuating element.
  • FIGS. 7A to D The structure of this microswitch integrated in the striker is shown in FIGS. 7A to D.
  • the Hall difference IC 4 is connected to the leadframe 10, a CuSn6 punched circuit board, by means of resistance welding.
  • the other side of the punching board 10 has two tinned ELO plug pins 16.
  • the IC 4 with the punching board 10 is extrusion-coated with plastic.
  • the magnet 5 with the pole plate 6 is fitted in the insulating material housing 7 after the first encapsulation. Thereafter, a second overmolding in the two-component injection molding process is required for fixing the magnet 5 and for sealing the punching board 10 (receiving holes of the first overmolding).
  • the non-contact Hall switch has the following advantages over a conventional striker with a mechanical switch: the use of fewer individual parts initially results in greater reliability. Due to the lower tolerances on the switch-on point, transmission of motion over oblique flanks can be avoided. There is no wear on the individual parts and the actuating element; contact contamination, contact wear and contact bounce are prevented. In addition, there is no risk of mechanical parts freezing.
  • the interaction of the magnetic tolerances with the IC tolerances results in a sensitivity curve of the magnetic flux difference with respect to the switching distance, from which it can be seen that, for large switching distances, the tolerances must advantageously be adjusted, for example, by an adjusting plate.
  • the switching distance can be adjusted within desired tolerances in a simple manner by shifting the IC in the direction of the triggering part and by additionally shifting an adjusting plate attached in the area of one of the Hall sensors. In the Hall sensor in question, however, the induction is not shifted into the maximum range, but rather only its bias voltage is increased.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

Le circuit intégré (4) est incliné d'environ 30° par rapport à la surface active (1) du commutateur duquel se rapproche la partie de déclenchement (8). Lorsque la partie de déclenchement (8) se rapproche du capteur de Hall (2) qui est le plus proche de la surface active, un flux magnétique différentiel est généré. Ce flux magnétique différentiel est considéré comme un signal clair indicateur de la mise sous tension du commutateur même lorsque la partie de déclenchement (8) prend par la suite une position centrale au-dessus du commutateur.
PCT/DE1996/000219 1995-02-20 1996-02-12 Commutateur a circuit integre differentiel a effet de hall pour la detection sans contact de la position, notamment pour vehicules a moteur WO1996026574A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46631/96A AU4663196A (en) 1995-02-20 1996-02-12 Switch with hall difference ic for contactless position sensing, in particular in motor vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19505759.7 1995-02-20
DE1995105759 DE19505759C2 (de) 1995-02-20 1995-02-20 Schalter mit einem Hall-Differenz-IC für berührungslose Positionsabfrage, insbesondere im Kfz-Bereich

Publications (1)

Publication Number Publication Date
WO1996026574A1 true WO1996026574A1 (fr) 1996-08-29

Family

ID=7754495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/000219 WO1996026574A1 (fr) 1995-02-20 1996-02-12 Commutateur a circuit integre differentiel a effet de hall pour la detection sans contact de la position, notamment pour vehicules a moteur

Country Status (3)

Country Link
AU (1) AU4663196A (fr)
DE (1) DE19505759C2 (fr)
WO (1) WO1996026574A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318610A (en) * 1996-10-26 1998-04-29 Kiekert Ag A device for the interrogation of switching positions on a motor vehicle door lock
GB2319291A (en) * 1996-11-13 1998-05-20 Kiekert Ag Motor vehicle door lock system
CN109455092A (zh) * 2018-11-21 2019-03-12 东莞广泽汽车饰件有限公司 一种用于汽车的非按压式感应开关

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3614249B2 (ja) * 1996-06-25 2005-01-26 三菱電機株式会社 磁性移動体センサ
DE19702206C2 (de) * 1996-08-24 2000-08-03 Kiekert Ag Kraftfahrzeugtürverschluß mit Schloßsystem und Schließsystem, welcher eine Einrichtung zur Abfrage der Funktionsstellungen des Schließzylinders aufweist, die mit Hallsensoren arbeitet
DE19643947C9 (de) * 1996-10-31 2004-10-14 Kiekert Ag Verschlußeinrichtung für eine Kraftfahrzeugtür mit Türschloß und Schloßhalter
FR2775772B1 (fr) * 1998-03-06 2000-05-26 Crouzet Automatismes Detecteur de proximite utilisant des magnetoresistances
DE20018538U1 (de) 2000-10-27 2002-03-07 Mannesmann Vdo Ag Sensormodul
DE10065100B4 (de) * 2000-12-28 2005-05-25 Brose Schließsysteme GmbH & Co.KG Kraftfahrzeugschloß mit sensorischer Abfrage der Hauptschließstellung
GB2424036B (en) * 2004-03-30 2007-02-21 Mitsui Mining & Smelting Co Door lock system
WO2020215040A1 (fr) * 2019-04-19 2020-10-22 Inteva Products, Llc Traces métalliques pour l'activation d'un capteur à effet hall dans un verrou de véhicule
DE102022118012A1 (de) 2022-07-19 2024-01-25 Kiekert Aktiengesellschaft Kraftfahrzeug-Türverschluss

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179384A2 (fr) * 1984-10-18 1986-04-30 Gebhard Balluff Fabrik feinmechanischer Erzeugnisse GmbH & Co. Commutateur de proximité insensible aux champs parasites
EP0283291A2 (fr) * 1987-03-18 1988-09-21 Sprague Electric Company Détecteur de proximité magnétique différentiel
DE4008141A1 (de) * 1989-03-14 1990-09-20 Mitsubishi Electric Corp Sensor mit hall-effekt
EP0490266A2 (fr) * 1990-12-05 1992-06-17 Reinhold Kluge Commutateur de proximité

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045920A (en) * 1990-06-28 1991-09-03 Allegro Microsystems, Inc. Dual-Hall ferrous-article-proximity sensor
DE4211486C1 (fr) * 1992-04-06 1993-04-08 Siemens Ag, 8000 Muenchen, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179384A2 (fr) * 1984-10-18 1986-04-30 Gebhard Balluff Fabrik feinmechanischer Erzeugnisse GmbH & Co. Commutateur de proximité insensible aux champs parasites
EP0283291A2 (fr) * 1987-03-18 1988-09-21 Sprague Electric Company Détecteur de proximité magnétique différentiel
DE4008141A1 (de) * 1989-03-14 1990-09-20 Mitsubishi Electric Corp Sensor mit hall-effekt
EP0490266A2 (fr) * 1990-12-05 1992-06-17 Reinhold Kluge Commutateur de proximité

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318610A (en) * 1996-10-26 1998-04-29 Kiekert Ag A device for the interrogation of switching positions on a motor vehicle door lock
GB2318610B (en) * 1996-10-26 2000-09-20 Kiekert Ag A device for the interrogation of switching positions on a motor vehicle door lock
GB2319291A (en) * 1996-11-13 1998-05-20 Kiekert Ag Motor vehicle door lock system
GB2319291B (en) * 1996-11-13 2001-02-07 Kiekert Ag A motor vehicle door lock
CN109455092A (zh) * 2018-11-21 2019-03-12 东莞广泽汽车饰件有限公司 一种用于汽车的非按压式感应开关
CN109455092B (zh) * 2018-11-21 2023-09-29 东莞广泽汽车饰件有限公司 一种用于汽车的非按压式感应开关

Also Published As

Publication number Publication date
AU4663196A (en) 1996-09-11
DE19505759A1 (de) 1996-09-05
DE19505759C2 (de) 1997-02-13

Similar Documents

Publication Publication Date Title
EP0778954B1 (fr) Declencheur de proximite pourvu d'un detecteur sensible au champ magnetique
DE19505759C2 (de) Schalter mit einem Hall-Differenz-IC für berührungslose Positionsabfrage, insbesondere im Kfz-Bereich
EP1197402A2 (fr) Volant de véhicule
WO2004008080A1 (fr) Detecteur de position conçu comme detecteur a effet hall
CH664454A5 (de) Tastenschalter.
EP0703669A1 (fr) Commutateur de proximité ayant trois positions de commutation
DE2647818C2 (de) Einrichtung zur Abgabe eines elektrischen Signales
DE4331909A1 (de) Drehwinkelgeber
EP1173728A1 (fr) Circuit de commande electronique
DE4333395C2 (de) Hall-Näherungsschalter mit drei Schaltstellungen
DE4308038C2 (de) In einem Gehäuse angeordneter Schalter
DE2536931C2 (de) Magnetoresistiver Abtastkopf
DE4221625C1 (en) Electrical switch suitable for motor vehicle e.g. throttle flap or steering column - has Hall component and ferromagnetic shield assigned to housing base and cover
DE102006024680B4 (de) Positionsmeßvorrichtung
DE4211486C1 (fr)
DE10149776B4 (de) Sensorvorrichtung zur Messung von Magnetfeldern und Herstellungsverfahren derselben
EP0955702A1 (fr) Dispositif de connexion pour plaque de circuit imprimé
WO2008095320A1 (fr) Commutateur magnétique
DE19643947C2 (de) Verschlußeinrichtung für eine Kraftfahrzeugtür mit Türschloß und Schloßhalter
DE4126345C1 (en) Electric switch suitable for motor vehicle e.g. throttle flap, steering column or drive - assigns permanent magnets of same polarity to both ends of Hall element, one magnet being connected to adjustable actuator and other adjustable for balancing control
EP1274089B1 (fr) Module GMR
DE19508014C1 (de) Mechanischer Beschleunigungsschalter
EP1456882B1 (fr) Circuit comportant des composants electroniques loges sur un substrat support isolant
DE19902723C1 (de) Elektrischer Schalter zur berührungslosen Positionsabfrage eines mechanisch beweglichen ferromagnetischen Teils
EP3413344B1 (fr) Élément de connexion sous forme d'une pince multifonctionnelle ainsi qu'agencement de circuit comprenant cet élément de connexion

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AU BB BG BR CA CN CZ EE FI GE HU IS JP KG KP KR LK LR LT LV MD MG MK MN MX NO NZ PL RO SG SI SK TR TT UA US UZ VN AZ BY KG KZ RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase