WO2001000462A1 - Device for detecting the position of a moveable member in a locking system which is used in motor vehicles - Google Patents

Device for detecting the position of a moveable member in a locking system which is used in motor vehicles Download PDF

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Publication number
WO2001000462A1
WO2001000462A1 PCT/EP2000/005733 EP0005733W WO0100462A1 WO 2001000462 A1 WO2001000462 A1 WO 2001000462A1 EP 0005733 W EP0005733 W EP 0005733W WO 0100462 A1 WO0100462 A1 WO 0100462A1
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WO
WIPO (PCT)
Prior art keywords
hall sensor
locking
locking bolt
evaluator
permanent magnet
Prior art date
Application number
PCT/EP2000/005733
Other languages
German (de)
French (fr)
Inventor
Andreas Van Den Boom
Dirk Hansen-Rüther
Jens Kusemann
Original Assignee
Huf Hülsbeck & Fürst Gmbh & Co. Kg
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 Huf Hülsbeck & Fürst Gmbh & Co. Kg filed Critical Huf Hülsbeck & Fürst Gmbh & Co. Kg
Priority to AU62645/00A priority Critical patent/AU6264500A/en
Publication of WO2001000462A1 publication Critical patent/WO2001000462A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/02—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism
    • B60R25/021—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch
    • B60R25/0215—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch using electric means, e.g. electric motors or solenoids
    • B60R25/02153—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch using electric means, e.g. electric motors or solenoids comprising a locking member radially and linearly moved towards the steering column

Definitions

  • the invention is directed to a device of the type specified in the preamble of claim 1.
  • a preferred area of application for this device is electronic steering lock in motor vehicles.
  • the invention is also directed, in general, to devices for detecting the position of a movable member in a lock, and would therefore also be readily applicable to an electronic ignition switch where it is important to control one or more key rotary positions. In the present case, the invention will be explained in more detail using the steering lock.
  • microswitches were used to detect the position of the locking pin of a steering lock in order to monitor the locking position on the one hand and the unlocking position of the locking pin with respect to the steering spindle in a motor vehicle on the other hand.
  • two digitally effective Hall sensors are used, which interact with a permanent magnet, which is moved between the two positions when the locking bolt is adjusted. When the movable permanent magnet approaches a certain small distance, the digitally effective Hall sensor switches over and reports the corresponding end position of the locking bolt to an evaluator
  • the locking pin can jam, for example, in one of its end positions, one or both Hall sensors can become defective, or the permanent magnet can change its position.
  • so-called “redundancy” will be sought, where the one to be monitored End position is monitored in two ways.
  • a second permanent magnet and / or further Hall sensors had to be used, which increased the construction effort and / or the space requirement
  • the invention has for its object to develop an inexpensive, space-saving device of the type specified in the preamble of claim 1, which is characterized by high security in the position detection of the movable member. This is achieved according to the invention by the measures specified in the characterizing part of claim 1, which have the following special meaning.
  • the second Hall sensor for example, for monitoring the locking position, has the additional function Given also to monitor the unlocking position of the locking bolt. This is done by using the invention with the second Hall sensor instead of the digital one, because in this way the response range of this second Hall sensor extends over a large distance.
  • this second analog Hall sensor can inform the evaluator of the time course of the signals, at least in that section of the path of movement of the permanent magnet where the the first end position of the locking bolt, which is already monitored by the first Hall sensor.
  • the second analog Hall sensor is therefore redundant to the first Hall sensor. From the time course of the signals, the evaluator can differentiate between the various possible malfunctions and thereby trigger the specific function in the vehicle. This includes, for example, repeating the locking pin movement, or a corresponding fault message to the master electronics, or an error message, or an alarm trigger, or a shutdown of engine operation in the motor vehicle
  • Fig. 3 is a development of a part-circular curved stroke curve for the locking bolt of this device with indicated response range of the two Hall sensors and
  • FIG. 4 shows the signals from the two Hall sensors of this device to the evaluator when the locking bolt is lifted between its two end positions
  • the device according to the invention is shown in the drawings as an electronic steering lock 10, which in turn can be part of a vehicle authorization system.
  • This device will be referred to as "ELV" for short.
  • the ELV 10 is an integrated solution consisting of mechanics, electrics and actuators, which is basically the one from FIGS 2 apparent structure
  • a locking pin 11 is to be moved between two positions 11, 11 ', which are drawn out or shown in dash-dot lines in FIG. 2.
  • the locking pin In the position 11 drawn in a solid line, the locking pin is in its locking position, which can be seen in FIG
  • the steering column 12 of the vehicle is blocked, so that rotation of the steering column 12 in the direction of arrow 13 is not possible.
  • the locking bolt In the position shown in dash-dotted lines 1 1 ', the locking bolt is in its unlocking position. Then the locking bolt 11' is out of the locking opening 14 of the column 12 can be pulled out and the aforementioned steering column rotation 13 is possible
  • the locking pin 11 is structurally connected to a lifting element 15.
  • the lifting element is consequently in turn adjustable by the same lifting distance 16 as the locking pin, between the lifting positions 15, 15 'which are also drawn out and shown in broken lines in FIG.
  • the lifting member 15 is, as the eruption in Fig. 2, under the action of a spring 17.
  • the spring 17 strives for the locking pin from the lifting member 15 into the locking opening 14 of the steering column 13 to keep pressed.
  • the tip of the locking bolt 11 should not be aligned with the locking opening due to a steering column twist 13
  • the locking bolt first abuts on the circumferential surface of the steering column 12 in order to fall into the then aligned locking opening 14 during a subsequent rotation 13.
  • the components 1 1, 15, 17 consequently form a jointly movable structural unit.
  • the stroke movement of the structural unit from 11, 15 and 17, illustrated by the arrow 18 in FIG. 2, is based on the energization of an electric motor 20 triggered by control electronics.
  • This motor 20 acts on a lifting wheel 23 via a gear, eg consisting of a worm 21 and a worm wheel 22.
  • This lifting wheel 23 has two circular, axially facing lifting curves 24 on the inside of the wheel, on which the lifting member 15 is supported with two diametrical guide arms 25
  • the lifting member 15 is under the action of a restoring force 26, which starts from a return spring 27.
  • An arm 28 projects radially from the lifting member, to which a permanent magnet 30 is attached.
  • the stroke movement 18 consequently has an effect in a corresponding entrainment movement of the permanent magnet 30
  • Various electronic components are fastened on a printed circuit board 29 in the housing 19 of the ELV 10, including two Hall sensors 3 1. 32, which have different effects with respect to one another. They are initially at a distance 33 from one another which can be seen in FIG 1, 15, 17 corresponds. If both Hall sensors 31, 32 were digitally effective, then the one Hall sensor 31 would only respond to the active field of the permanent magnet if the lifting unit with its locking bolt is in the previously described dash-dotted unlocking position 1 1 ' the other Hall sensor 32 would then be activated by the permanent magnet 30 when the extended locking position of the locking pin 11 is present
  • the two Hall sensors 31, 32 thus detect the two lifting positions 15, 15 'of the lifting member.
  • the signals occurring at the outputs of the two Hall sensors are finally fed via a line 34 to an electronic evaluator 45, which monitors and detects the position of the lifting member 15 in this way.
  • the one Hall sensor 31 is digitally active and positioned such that it is only in the unlocked position 1 1 'or 15' is activated, which is why it can be referred to as an “unlocking Hall sensor”.
  • the lifting curve 24 from the lifting wheel 23 is shown in a flat angle. The ordinate of the curve in FIG.
  • FIG. 3 shows the lifting distance 16 between the two Stroke positions 15 and 15 'are entered on the ordinate, the course of the support of the guide arm 25 on the curve 24 is entered, the support location marked with 35 determining the locking position and the support location marked with 36 determining the unlocking position of the locking bolt.
  • the effective range of the unlocking Hall sensor 31 is 3 in the edge region of FIG This is also shown in Fig. 4, where the flux density in mT is given on the ordinate, while the measurement path is illustrated on the abscissa.
  • the upper signal curve, marked 41 applies to the unlocking Hall sensor 3 1. This results in the following course of action
  • the other Hall sensor 32 has an analog effect and therefore has a response range, identified by 40 in FIG. 3, which extends over a substantially greater distance than the above-described effective range 37 of the de-regulating Hall sensor.
  • This sensor 32 is therefore referred to below as “analog Hall sensor”.
  • This analog Hall sensor 32 not only detects the locking position but also informs the electronic evaluator 45 mentioned above of the time course of the signals occurring there during the stroke movement.
  • the resulting signal curve 42 is also shown in FIG Over the entire travel of the lifting member 15 between the two end positions 35, 36
  • This travel of the lifting member 15 is converted into a scaled analog voltage value and read by a microcontroller in the evaluator 45 via an A / D converter.
  • the effective range of this analog Hall sensor 32 therefore closes a uch the unlocking position 36, which is why the unlocking position is recognized redundantly.
  • the unlocking Hall sensor 31 could also have an analog mode of operation.
  • the device according to the invention can also be used in other application cases.
  • Another suitable application area was, for example, electronic ignition starter switches LIST OF REFERENCE NUMBERS

Abstract

An important function of the device for detecting the position of a moveable member in a locking system used in motor vehicles is to monitor the locking bolt (11) in an electronic steering lock (10) in one such motor vehicle. A permanent magnet (30) is arranged on the locking bolt (11) and at least two Hall effect sensors (31,32) are disposed in the effect field thereof. One sensor (32) monitors the locking position of the locking bolt (11) and the other sensor (31) monitors the unlocking position of the locking bolt (11). The Hall effect sensors (31,32) are connected to an evaluator (45). At least the second Hall effect sensor (32) is analogically effective in order to ensure redundant position detection. This results in a proportionally larger operating range. Both Hall effect sensors (31,32) are used in order to monitor one position, especially the unlocking position (11'), of the locking bolt (11). The evaluator (45) observes the time lapse of the signals occurring on the second analog Hall effect sensor (32) as well as capturing the signals of the first Hall effect sensor (31). The common evaluation of said signals provides a redundant monitoring result.

Description

Vorrichtung zur Positionserkennung eines beweglichen Glieds in einem bei Fahrzeugen anwendbaren VerschlussDevice for detecting the position of a movable member in a closure that can be used in vehicles
Die Erfindung richtet sich auf eine Vorrichtung der im Oberbegriff des Anspruches 1 angegebenen Art. Ein bevorzugtes Anwendungsgebiet dieser Vorrichtung ist die elektronische Lenkungsverriegelung bei Kraftfahrzeugen. Die Erfindung richtet sich aber auch, ganz allgemein auf Vorrichtungen zur Positionserkennung eines beweglichen Glieds in einem Verschluss, und wäre daher ohne weiteres auch bei einem elektronischen Zündschalter anwendbar, wo es darauf ankommt eine oder mehrere Schlüsseldrehstellungen zu kontrollieren. Im vorliegenden Fall soll die Erfindung anhand der Lenkungsverriegelung näher erläutert werden.The invention is directed to a device of the type specified in the preamble of claim 1. A preferred area of application for this device is electronic steering lock in motor vehicles. However, the invention is also directed, in general, to devices for detecting the position of a movable member in a lock, and would therefore also be readily applicable to an electronic ignition switch where it is important to control one or more key rotary positions. In the present case, the invention will be explained in more detail using the steering lock.
Früher hat man zur Positionserkennung des Sperrbolzens einer Lenkungsverriegelung Mikroschalter eingesetzt, um einerseits die Verriegelungsposition und andererseits die Entriegelungsposition des Sperrbolzens bezüglich der Lenkspindel in einem Kraftfahrzeug zu überwachen. Bei modernen Lenkungsverriegelungen verwendet man dafür zwei digital wirksame Hallsensoren, die mit einem Permanentmagneten zusammenwirken, welcher bei der Verstellung des Sperrbolzens zwischen den beiden Positionen mitbewegt wird. Bei Annäherung des mitbeweglichen Permanentmagneten auf eine bestimmte, kleine Distanz schaltet der digital wirksame Hallsensor um und meldet einem Auswerter die entsprechende Endposition des SperrbolzensIn the past, microswitches were used to detect the position of the locking pin of a steering lock in order to monitor the locking position on the one hand and the unlocking position of the locking pin with respect to the steering spindle in a motor vehicle on the other hand. In modern steering locks, two digitally effective Hall sensors are used, which interact with a permanent magnet, which is moved between the two positions when the locking bolt is adjusted. When the movable permanent magnet approaches a certain small distance, the digitally effective Hall sensor switches over and reports the corresponding end position of the locking bolt to an evaluator
Beim Betrieb einer derartigen Vorrichtung kann es zu verschiedenen Störungen kommen. Der Sperrbolzen kann sich z.B. in einer seiner Endpositionen verklemmen, einer oder beide Hallsensoren können defekt werden, oder der Permanentmagnet kann seine Lage verändern. Um die Sicherheit einer solchen Vorrichtung zu erhöhen, wird man eine sogenannte „Redundanz" anstreben, wo die zu überwachende Endposition auf zwei Wegen überwacht wird Dazu musste man bei der bekannten Vorrichtung einen zweiten Permanentmagneten und/oder weitere Hallsensoren verwenden, was den Bauaufwand und/oder den Platzbedarf erhöhtVarious malfunctions can occur when operating such a device. The locking pin can jam, for example, in one of its end positions, one or both Hall sensors can become defective, or the permanent magnet can change its position. In order to increase the security of such a device, so-called "redundancy" will be sought, where the one to be monitored End position is monitored in two ways. In the known device, a second permanent magnet and / or further Hall sensors had to be used, which increased the construction effort and / or the space requirement
Der Erfindung liegt die Aufgabe zugrunde, eine preiswerte, raumsparende Vorrichtung der im Oberbegriff des Anspruches 1 angegebenen Art zu entwickeln, die sich durch eine hohe Sicherheit in der Positionserkennung des beweglichen Glieds auszeichnet Dies wird erfindungsgemäß durch die im Kennzeichen des Anspruches 1 angegebenen Maßnahmen erreicht, denen folgende besondere Bedeutung zukommt.The invention has for its object to develop an inexpensive, space-saving device of the type specified in the preamble of claim 1, which is characterized by high security in the position detection of the movable member. This is achieved according to the invention by the measures specified in the characterizing part of claim 1, which have the following special meaning.
Auch bei der Erfindung werden nur zwei Hallsensoren verwendet, von denen der eine bei Anwendung auf eine Lenkungsverriegelung zur Überwachung der Verriegelungsposition und der andere zur Überwachung der Entriegelungsposition des Sperrbolzens verwendet wird, doch wird dem zweiten, z.B zur Überwachung der Verriegelungsposition dienenden Hallsensor die zusatzliche Funktion gegeben, auch die Entriegelungsposition des Sperrbolzens zu überwachen Dies geschieht, indem die Erfindung beim zweiten Hallsensor statt der digitalen eine analoge Wirksamkeit benutzt, weil auf dieser Weise der Ansprechbereich dieses zweiten Hallsensors sich über eine große Distanz erstreckt. Gegenüber dem Wirkbereich eines digitalen Hallsensors ist diese Distanz erheblich großer Durch diesen über ein weites Feld sich erstreckenden Ansprechbereich kann dieser zweite Analog-Hallsensor dem Auswerter den zeitlichen Verlauf der anfallenden Signale mitteilen, und zwar mindestens in jenem Wegabschnitt im Bewegungspfad des Permanentmagneten, wo sich die vom ersten Hallsensor bereits überwachte erste Endposition des Sperrbolzens befindet. Der zweite Analog-Hallsensor ist also redundant zu dem ersten Hallsensor wirksam. Aus dem zeitlichen Verlauf der Signale kann der Auswerter die verschiedenen möglichen Stόrfälle unterscheiden und dadurch die jeweils spezifische Funktion im Fahrzeug auslosen Dazu gehört z B eine Wiederholung der Sperrbolzenbewegung, oder eine entsprechende Storungsmeldung an die Master-Elektronik, oder eine Fehlermeldung, oder eine Alarmauslosung, oder eine Abschaltung des Motorbetriebs im KraftfahrzeugAlso in the invention, only two Hall sensors are used, one of which is used when applied to a steering lock for monitoring the locking position and the other for monitoring the unlocking position of the locking bolt, but the second Hall sensor, for example, for monitoring the locking position, has the additional function Given also to monitor the unlocking position of the locking bolt. This is done by using the invention with the second Hall sensor instead of the digital one, because in this way the response range of this second Hall sensor extends over a large distance. Compared to the effective range of a digital Hall sensor, this distance is considerably larger.Thanks to this response range, which extends over a wide field, this second analog Hall sensor can inform the evaluator of the time course of the signals, at least in that section of the path of movement of the permanent magnet where the the first end position of the locking bolt, which is already monitored by the first Hall sensor. The second analog Hall sensor is therefore redundant to the first Hall sensor. From the time course of the signals, the evaluator can differentiate between the various possible malfunctions and thereby trigger the specific function in the vehicle. This includes, for example, repeating the locking pin movement, or a corresponding fault message to the master electronics, or an error message, or an alarm trigger, or a shutdown of engine operation in the motor vehicle
Weitere Maßnahmen und Vorteile der Erfindung ergeben sich aus den Unteranspruchen, der nachfolgenden Beschreibung und den Zeichnungen In den Zeichnungen ist die Erfindung in einem Ausfuhrungsbeispiel dargestellt Es zeigenFurther measures and advantages of the invention result from the Subordinate claims, the following description and the drawings In the drawings, the invention is shown in an exemplary embodiment
Fig 1, in perspektivischer Darstellung, einige Bauteile der alsFig. 1, in perspective, some components of the
Anwendung für die Erfindung gewählten elektronischen Lenkungsverriegelung,Application selected for the invention electronic steering lock,
Fig 2, schematisch, den mechanischen Aufbau und das elektrischeFig. 2, schematically, the mechanical structure and the electrical
Blockschaltbild einer solchen Lenkungsverπegelung,Block diagram of such a steering control,
Fig 3 eine Abwicklung einer teilkreisformig gekrümmten Hubkurve für den Sperrbolzens dieser Vorrichtung mit angedeutetem Ansprechbereich der beiden Hallsensoren undFig. 3 is a development of a part-circular curved stroke curve for the locking bolt of this device with indicated response range of the two Hall sensors and
Fig 4 die dem Auswerter zugehenden Signale der beiden Hallsensoren dieser Vorrichtung beim Hub des Sperrbolzens zwischen dessen beiden EndpositionenFIG. 4 shows the signals from the two Hall sensors of this device to the evaluator when the locking bolt is lifted between its two end positions
Die erfindungsgemaße Vorrichtung ist in den Zeichnungen als elektronische Lenkungsverriegelung 10 dargestellt, die ihrerseits Teil eines Fahrzeugberechtigungssystems sein kann Diese Vorrichtung soll kurz „ELV" bezeichnet werden Die ELV 10 ist eine integrierte Losung aus Mechanik, Elektrik und Aktuatorik, die grundsatzlich den aus Fig 1 und 2 ersichtlichen Aufbau hatThe device according to the invention is shown in the drawings as an electronic steering lock 10, which in turn can be part of a vehicle authorization system. This device will be referred to as "ELV" for short. The ELV 10 is an integrated solution consisting of mechanics, electrics and actuators, which is basically the one from FIGS 2 apparent structure
Durch die ELV 10 soll ein Sperrbolzen 1 1 zwischen zwei in Fig 2 ausgezogen bzw strichpunktiert verdeutlichten Positionen 11, 1 1 ' bewegt werden In der ausgezogen gezeichneten Position 11 befindet sich der Sperrbolzen in seiner aus Fig 2 erkennbaren Verπegelungsposition, wo er mit seinem Sperrende eine Lenksäule 12 des Fahrzeugs blockiert, so dass eine Drehung der Lenksäule 12 im Sinne des Pfeiles 13 nicht möglich ist In der strichpunktiert verdeutlichten Stellung 1 1 ' befindet sich der Sperrbolzen dagegen in seiner Entπegelungsposition Dann ist der Sperrbolzen 11 ' aus der Sperroffnung 14 der Säule 12 herausgezogen werden und die vorerwähnte Lenksaulendrehung 13 ist möglich Der Sperrbolzen 1 1 ist mit einem Hubglied 15 baueinheitlich verbunden Das Hubglied ist folglich seinerseits um die gleiche Hubstrecke 16, wie der Sperrbolzen, zwischen den ebenfalls ausgezogen und gestrichelt in Fig 2 verdeutlichen Hubpositionen 15, 15' verstellbar. Das Hubglied 15 steht, wie der Ausbruch in Fig 2 zeigt, unter der Wirkung einer Feder 17 Wenn das Hubglied sich in der ausgezogenen Position 15 von Fig 2 befindet, ist die Feder 17 bestrebt den Sperrbolzen aus dem Hubglied 15 in die Sperröffnung 14 der Lenksäule 13 eingedrückt zu halten. Wenn jedoch aufgrund einer Lenksaulenverdrehung 13 die Spitze des Sperrbolzens 1 1 nicht mit der Sperroffnung ausgerichtet sein sollte, stutzt sich der Sperrbolzen zunächst an der Umfangsfläche der Lenksäule 12 ab, um bei einer nachfolgenden Drehung 13 in die dann ausgerichtete Sperroffnung 14 einzufallen. Die Bauteile 1 1, 15, 17 bilden folglich eine gemeinsam bewegliche Baueinheit.By means of the ELV 10, a locking pin 11 is to be moved between two positions 11, 11 ', which are drawn out or shown in dash-dot lines in FIG. 2. In the position 11 drawn in a solid line, the locking pin is in its locking position, which can be seen in FIG The steering column 12 of the vehicle is blocked, so that rotation of the steering column 12 in the direction of arrow 13 is not possible. In the position shown in dash-dotted lines 1 1 ', the locking bolt is in its unlocking position. Then the locking bolt 11' is out of the locking opening 14 of the column 12 can be pulled out and the aforementioned steering column rotation 13 is possible The locking pin 11 is structurally connected to a lifting element 15. The lifting element is consequently in turn adjustable by the same lifting distance 16 as the locking pin, between the lifting positions 15, 15 'which are also drawn out and shown in broken lines in FIG. The lifting member 15 is, as the eruption in Fig. 2, under the action of a spring 17. When the lifting member is in the extended position 15 of Fig. 2, the spring 17 strives for the locking pin from the lifting member 15 into the locking opening 14 of the steering column 13 to keep pressed. However, if the tip of the locking bolt 11 should not be aligned with the locking opening due to a steering column twist 13, the locking bolt first abuts on the circumferential surface of the steering column 12 in order to fall into the then aligned locking opening 14 during a subsequent rotation 13. The components 1 1, 15, 17 consequently form a jointly movable structural unit.
Die durch den Pfeil 18 in Fig. 2 verdeutlichte Hubbewegung der Baueinheit aus 1 1, 15 und 17 geht von einer Steuerelektronik ausgelosten Bestromung eines Elektromotors 20 aus. Dieser Motor 20 wirkt über ein, z B aus einer Schnecke 21 und einem Schneckenrad 22 bestehendes Getriebe auf ein Hubrad 23 ein Dieses Hubrad 23 besitzt im Radinneren zwei kreisförmige, axial weisende Hubkurven 24, auf denen sich das Hubglied 15 mit zwei diametralen Fuhrungsarmen 25 abstutzt Das Hubglied 15 steht unter der Wirkung einer Ruckstellkraft 26, die von einer Rückstellfeder 27 ausgeht. Am Hubglied ragt ein Arm 28 radial ab, an welchem ein Permanentmagnet 30 befestigt ist. Die Hubbewegung 18 wirkt sich folglich in einer entsprechenden Mitnahmebewegung des Permanentmagneten 30 ausThe stroke movement of the structural unit from 11, 15 and 17, illustrated by the arrow 18 in FIG. 2, is based on the energization of an electric motor 20 triggered by control electronics. This motor 20 acts on a lifting wheel 23 via a gear, eg consisting of a worm 21 and a worm wheel 22. This lifting wheel 23 has two circular, axially facing lifting curves 24 on the inside of the wheel, on which the lifting member 15 is supported with two diametrical guide arms 25 The lifting member 15 is under the action of a restoring force 26, which starts from a return spring 27. An arm 28 projects radially from the lifting member, to which a permanent magnet 30 is attached. The stroke movement 18 consequently has an effect in a corresponding entrainment movement of the permanent magnet 30
Im Gehäuse 19 der ELV 10 sind verschiedene elektronische Bauteile auf einer Leiterplatte 29 befestigt, darunter zwei Hallsensoren 3 1. 32, die zueinander unterschiedlich wirksam sind Sie stehen zunächst in einem aus Fig 1 erkennbaren Abstand 33 zueinander, welcher der Hubstrecke 16 der genannte Hubbaueinheit 1 1, 15, 17 entspricht. Wenn beide Hallsensoren 31 , 32 digital wirksam waren, dann würde der eine Hallsensor 31 nur dann auf das Wirkfeld des Permanentmagneten ansprechen, wenn die Hubbaueinheit mit ihrem Sperrbolzen in der bereits beschriebenen strichpunktierten Entriegelungsposition 1 1 ' sich befindet Dagegen würde der andere Hallsensor 32 dann vom Permanentmagneten 30 wirksam gesetzt werden, wenn die ausgezogene Verriegelungsposition vom Sperrbolzen 1 1 vorliegtVarious electronic components are fastened on a printed circuit board 29 in the housing 19 of the ELV 10, including two Hall sensors 3 1. 32, which have different effects with respect to one another. They are initially at a distance 33 from one another which can be seen in FIG 1, 15, 17 corresponds. If both Hall sensors 31, 32 were digitally effective, then the one Hall sensor 31 would only respond to the active field of the permanent magnet if the lifting unit with its locking bolt is in the previously described dash-dotted unlocking position 1 1 ' the other Hall sensor 32 would then be activated by the permanent magnet 30 when the extended locking position of the locking pin 11 is present
Die beiden Hallsensoren 31, 32 detektieren also die beiden Hubpositionen 15, 15' des Hubglieds.The two Hall sensors 31, 32 thus detect the two lifting positions 15, 15 'of the lifting member.
Die an den Ausgängen der beiden Hallsensoren anfallenden Signale werden schließlich über eine Leitung 34 einem elektronischen Auswerter 45 zugeleitet, der auf diesem Wege die Position des Hubglieds 15 überwacht und detektiert Der eine Hallsensor 31 ist digital wirksam und so positioniert, dass er nur in der Entriegelungsposition 1 1 ' bzw 15' aktiviert ist, weshalb er als „Entriegelungs- Hallsensor" bezeichnet werden kann. In Fig 3 ist die Hubkurve 24 vom Hubrad 23 in ebener Abwinklung dargestellt Auf der Ordinate der Kurve in Fig 3 ist die Hubstrecke 16 zwischen den beiden Hubpositionen 15 und 15 ' eingetragen Auf der Ordinate ist der Verlauf der Abstützung des Fuhrungsarms 25 auf der Kurve 24 eingetragen, wobei die mit 35 gekennzeichnete Abstutzstelle die Verriegelungsposition und die mit 36 markierte Abstutzstelle die Entriegelungsposition des Sperrbolzens bestimmen Der Wirkbereich des Entriegelungs-Hallsensors 31 ist im Randbereich der Fig 3 durch die Klammer 37 verdeutlicht. Dies geht auch aus Fig. 4 hervor Dort ist auf der Ordinate die Flußdichte in mT angegeben, während auf der Abszisse der Messweg verdeutlicht ist Für den Entriegelungs-Hallsensor 3 1 gilt die obere, mit 41 gekennzeichnete Signalkurve. Daraus ergibt sich der folgende WirkverlaufThe signals occurring at the outputs of the two Hall sensors are finally fed via a line 34 to an electronic evaluator 45, which monitors and detects the position of the lifting member 15 in this way. The one Hall sensor 31 is digitally active and positioned such that it is only in the unlocked position 1 1 'or 15' is activated, which is why it can be referred to as an “unlocking Hall sensor”. In FIG. 3, the lifting curve 24 from the lifting wheel 23 is shown in a flat angle. The ordinate of the curve in FIG. 3 shows the lifting distance 16 between the two Stroke positions 15 and 15 'are entered on the ordinate, the course of the support of the guide arm 25 on the curve 24 is entered, the support location marked with 35 determining the locking position and the support location marked with 36 determining the unlocking position of the locking bolt. The effective range of the unlocking Hall sensor 31 is 3 in the edge region of FIG This is also shown in Fig. 4, where the flux density in mT is given on the ordinate, while the measurement path is illustrated on the abscissa. The upper signal curve, marked 41, applies to the unlocking Hall sensor 3 1. This results in the following course of action
Man geht bei Fig. 3 und 4 von der Verriegelungsposition des Hubglieds 35 aus, die, wie gesagt, bei 35 vorliegt. Bei Aktivierung des Motors bewegt sich das Hubglied auf der Hubkurve 24 bis zu einem ersten mit 38 gekennzeichneten Plateau, wo der Entriegelungs-Hallsensor 31 noch nicht aktiviert ist Seine Aktivierung erfolgt vielmehr erst im sich danach anschließenden letzten, mit 39 gekennzeichneten Anstieg, wenn das obere Plateau die mit 36 gekennzeichneten Entriegelungsposition erreicht hat. Dies wirkt sich, ausweislich der zugehörigen Messkurve 41 in Fig 4, dadurch aus, dass am Ausgang des Hallsensors ein Signal erscheint, die Kurve 41 macht einen Sprung 43. Die Lage 43 bezuglich des Weges bestimmt den Wirkbereich 37. Je nach Betätigungsrichtung des Sperrbolzens zwischen 1 1 und 1 1 ' ergibt sich, wie Fig. 3 zeigt, ein „Hysteresis-Effekt" an der Messkurve 41 Der andere Hallsensor 32 dagegen ist analog wirksam und hat daher einen in Fig 3 mit 40 gekennzeichneten Ansprechbereich, der über eine wesentlich größere Distanz sich erstreckt, als der vorbeschriebene Wirkbereich 37 des Entπegelungs- Hallsensors Dieser Sensor 32 soll daher nachfolgend kurz „Analog-Hallsensor" bezeichnet werden Dieser Analog-Hallsensor 32 detektiert aber nicht nur die Verriegelungsposition sondern teilt den bereits erwähnten elektronischen Auswerter 45 auch den zeitlichen Verlauf der dort anfallenden Signale wahrend der Hubbewegung mit. Die sich daraus ergebende Signalkurve 42 ist ebenfalls in Fig 4 eingezeichnet Sie erstreckt sich praktisch über den gesamten Verfahrweg des Hubglieds 15 zwischen den beiden Endpositionen 35, 36 Dieser Verfahrweg des Hubglieds 15 wird in einem skalierten analogen Spannungswert umgewandelt und von einem Mikrocontroller im Auswerter 45 über einen A/D-Wandler eingelesen Der Wirkbereich dieses Analog-Hallsensors 32 schließt also auch die Entriegelungsposition 36 ein, weshalb die Entriegelungsposition redundant erkannt wird.3 and 4, one starts from the locking position of the lifting member 35, which, as said, is present at 35. When the motor is activated, the lifting member moves on the lifting curve 24 up to a first plateau identified by 38, where the unlocking Hall sensor 31 has not yet been activated. Rather, it is activated only in the subsequent subsequent climb, identified by 39, when the upper one Plateau has reached the unlocking position marked with 36. According to the associated measurement curve 41 in FIG. 4, this has the effect that a signal appears at the output of the Hall sensor, curve 41 makes a jump 43. The position 43 with respect to the path determines the effective range 37. Depending on the actuation direction of the locking bolt, between 1 1 and 1 1 'results, as FIG. 3 shows, a “hysteresis effect” on the measurement curve 41 The other Hall sensor 32, on the other hand, has an analog effect and therefore has a response range, identified by 40 in FIG. 3, which extends over a substantially greater distance than the above-described effective range 37 of the de-regulating Hall sensor. This sensor 32 is therefore referred to below as “analog Hall sensor”. This analog Hall sensor 32 not only detects the locking position but also informs the electronic evaluator 45 mentioned above of the time course of the signals occurring there during the stroke movement. The resulting signal curve 42 is also shown in FIG Over the entire travel of the lifting member 15 between the two end positions 35, 36 This travel of the lifting member 15 is converted into a scaled analog voltage value and read by a microcontroller in the evaluator 45 via an A / D converter. The effective range of this analog Hall sensor 32 therefore closes a uch the unlocking position 36, which is why the unlocking position is recognized redundantly.
Wird die Entriegelungsposition nicht zweifelsfrei über beide Hallsensoren 31, 32 ermittelt, so wird dies vom Auswerter 45 festgestellt und die entsprechende Funktion im Fahrzeug ausgelost. Es gibt verschiedene Fehler, die unterschiedliche Reaktionen zur Folge haben. Dies ist in Fig. 2 durch einige Funktionsblocke 47, 48, 49 veranschaulicht, die über Leitungen 46 an den Auswerter 45 angeschlossen sind In einem Fall, wenn z.B keiner der beiden Hallsensoren 31, 32 ein Signal abgibt, kann ein schwerwiegender Defekt vorliegen, weshalb dann, wie im Display 44 des Funktionsblock 48 angegeben ist, Alarm ausgelost werden Der Alarm kann auf optische und/oder akustische Weise erfolgen Im schwerwiegenden Fall kann auch der Motorantrieb des Kraftfahrzeugs ganz abgeschaltet werdenIf the unlocking position is not unequivocally determined via both Hall sensors 31, 32, this is determined by the evaluator 45 and the corresponding function in the vehicle is triggered. There are different errors that result in different reactions. This is illustrated in FIG. 2 by some function blocks 47, 48, 49, which are connected to the evaluator 45 via lines 46. In a case where, for example, neither of the two Hall sensors 31, 32 emits a signal, there may be a serious defect, which is why then, as indicated in the display 44 of the function block 48, the alarm is triggered. The alarm can take place optically and / or acoustically. In a serious case, the motor drive of the motor vehicle can also be switched off completely
Fallweise konnte auch der Entriegelungs-Hallsensor 31 eine analoge Arbeitsweise aufweisen Die erfindungsgemaße Vorrichtung kann auch in anderen Anwendungsfallen benutzt werden Ein weiteres geeignetes Anwendungsfeld waren z.B. elektronische Zundstartschalter BezugszeichenlisteIn some cases, the unlocking Hall sensor 31 could also have an analog mode of operation. The device according to the invention can also be used in other application cases. Another suitable application area was, for example, electronic ignition starter switches LIST OF REFERENCE NUMBERS
elektrische Lenkverriegelung, ELV Sperrbolzen (Verriegelungsposition) ' Entriegelungsposition von 11 Lenksäule Drehpfeil für 12 Sperröffnung von 12 Hubglied (erste Hubposition) ' zweite Hubposition von 15 Hub strecke von 15 Feder für 11 Hubbewegungspfeil von 15 Gehäuse Motor Getriebe, Schnecke Getriebe, Schneckenrad Hubrad Hubkurve in 23 Führungsarm an 15 für 24 Rückstellkraft für 15 Rückstellfeder für 26 Arm an 15 Leiterplatte für 31, 32 Permanentmagnet an 28 erster Hallsensor, Entriegelungs-Hallsensor zweiter Hallsensor, Analog-Hallsensor Abstand zwischen 31, 32 Leitung erste Abstützstelle von 25 (Verriegelungsposition) zweite Abstutzstelle von 25 (Entriegelungsposition) Wirkbereich von 31 (Fig.3) erstes Plateau in 24 (Fig.3) Anstieg von 24 (Fig. 3)electric steering lock, ELV locking bolt (locking position) '' unlocking position of 11 steering column rotating arrow for 12 locking opening of 12 lifting element (first lifting position) '' second lifting position of 15 stroke distance of 15 spring for 11 stroke movement arrow of 15 housing motor gear, worm gear, worm gear lifting wheel stroke curve in 23 guide arm on 15 for 24 return force for 15 return spring for 26 arm on 15 circuit board for 31, 32 permanent magnet on 28 first Hall sensor, unlocking Hall sensor second Hall sensor, analog Hall sensor distance between 31, 32 line first support point of 25 (locking position) second support point of 25 (unlocking position) effective range of 31 (Fig. 3) first plateau in 24 (Fig. 3) Increase from 24 (Fig. 3)
Ansprechbereich von 32 (Fig. 3)Response range of 32 (Fig. 3)
Signalkurve für 31Signal curve for 31
Signalkurve für 32Signal curve for 32
Sprung in 41 (Fig. 4)Jump into 41 (Fig. 4)
Display in 48Display in 48
Auswerterevaluator
Leitung erster Funktionsblock an 45 zweiter Funktionsblock dritter Funktionsblock Lead first function block to 45 second function block third function block

Claims

Patentansprüche claims
) Vorrichtung zur Positionserkennung eines beweglichen Gliedes in einem bei Fahrzeugen anwendbaren Verschluss, insbesondere eines Sperrbolzens (11) einer elektronischen Lenkungsverriegelung (10) bei einem Kraftfahrzeug,) Device for detecting the position of a movable member in a lock that can be used in vehicles, in particular a locking pin (11) of an electronic steering lock (10) in a motor vehicle,
wobei der Sperrbolzen (11) unmittelbar oder mittelbar einen mitbeweglichen Permanentmagneten (30) tragtthe locking pin (11) directly or indirectly carrying a permanent magnet (30) which can move with it
und im Wirkfeld des bewegten Permanentmagneten (30) wenigstens zwei Hallsensoren (31, 32) angeordnet sind, von denen der eine auf die erste Position des beweglichen Gliedes (11), wie die Verπegelungsposition des Sperrbolzens (11) und der andere auf die zweite Position, wie die Entriegelungsposition des Sperrbolzens (11) ansprechen,and in the effective field of the moving permanent magnet (30) at least two Hall sensors (31, 32) are arranged, one of which is in the first position of the movable member (11), such as the locking position of the locking bolt (11) and the other is in the second position how the release position of the locking pin (11) respond,
und die Ausgange der beiden Hallsensoren (31, 32) mit einem elektronischen Auswerter (45) verbunden sind, der - entsprechend den eingehenden Signalen - bestimmte Funktionen (47, 48, 49) im Fahrzeug auslost,and the outputs of the two Hall sensors (31, 32) are connected to an electronic evaluator (45) which triggers certain functions (47, 48, 49) in the vehicle in accordance with the incoming signals,
dadurch gekennzeichnet ,characterized ,
dass wenigstens der zweite Hallsensor (32) analog wirksam ist und daher einen über eine verhältnismäßig große Distanz sich erstreckenden Ansprechbereich (37) aufweist,that at least the second Hall sensor (32) has an analog effect and therefore has a response range (37) which extends over a relatively large distance,
dass der Auswerter (45) zusatzlich zu der Überwachung der ersten Position des beweglichen Glieds (11) durch den ersten Hallsensor (31), nämlich insbesondere der Entriegelungsposition (11') des Sperrbolzens, auch den zeitlichen Verlauf der an dem zweiten Analog-Hallsensor (32) anfallenden Signale (42) mindestens in jenem Wegabschnitt des Bewegungswegs vom Permanentmagneten (30) überwacht, wo sich die bereits vom ersten Hallsensor (3 1) überwachte erste Positionthat in addition to the monitoring of the first position of the movable member (11) by the first Hall sensor (31), namely in particular the unlocking position (11 ') of the locking bolt, the evaluator (45) also shows the time course of the on the second analog Hall sensor ( 32) resulting signals (42) are monitored by the permanent magnet (30) at least in that section of the movement path, where the first position already monitored by the first Hall sensor (3 1)
(11) befindet,(11) is located
und dass die vom Auswerter (45) bei dieser ersten Position des beweglichen Glieds auszulosende Funktion (47, 48, 49) im Fahrzeug sowohl vom Signal (41) des ersten Hallsensors (3 1) als auch von dem am zweiten Analog- Hallsensor (32) anfallenden zeitlichen Signalverlauf (42) bestimmt istand that the function (47, 48, 49) to be triggered by the evaluator (45) at this first position of the movable member in the vehicle both from the signal (41) of the first Hall sensor (3 1) and from that on the second analog Hall sensor (32 ) resulting signal curve (42) is determined
2.) Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der erste Hallsensor (31) digital wirksam ist und daher einen über eine verhältnismäßig kleine Distanz sich erstreckenden Ansprechbereich aufweist2.) Device according to claim 1, characterized in that the first Hall sensor (31) is digitally effective and therefore has a response range extending over a relatively small distance
3.) Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass auch der erste Hallsensor (31) analog wirksam ist.3.) Device according to claim 1, characterized in that the first Hall sensor (31) is also effective.
4.) Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Auswerter (45) mit dem Analog-Hallsensor (32) praktisch die gesamte Wegstrecke des Permanentmagneten (30) zwischen den beiden Positionen (1 1, 1 1 ') des beweglichen Gliedes, wie eines Sperrbolzens, überwacht,4.) Device according to one or more of claims 1 to 3, characterized in that the evaluator (45) with the analog Hall sensor (32) practically the entire distance of the permanent magnet (30) between the two positions (1 1, 1 1 ') monitors the movable member, such as a locking pin,
nämlich zwischen der Verriegelungsposition (1 1 ) und der Entriegelungsposition (1 1 ') des Sperrbolzens. namely between the locking position (1 1) and the unlocking position (1 1 ') of the locking bolt.
PCT/EP2000/005733 1999-06-26 2000-06-21 Device for detecting the position of a moveable member in a locking system which is used in motor vehicles WO2001000462A1 (en)

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