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WO2021233569A1 - Agencement pour un véhicule pour la détection inductive d'une action d'activation - Google Patents

Agencement pour un véhicule pour la détection inductive d'une action d'activation Download PDF

Info

Publication number
WO2021233569A1
WO2021233569A1 PCT/EP2020/087905 EP2020087905W WO2021233569A1 WO 2021233569 A1 WO2021233569 A1 WO 2021233569A1 EP 2020087905 W EP2020087905 W EP 2020087905W WO 2021233569 A1 WO2021233569 A1 WO 2021233569A1
Authority
WO
WIPO (PCT)
Prior art keywords
arrangement
detection
sensor elements
sensor
activation action
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2020/087905
Other languages
German (de)
English (en)
Inventor
Berthold Sieg
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.)
Huf Huelsbeck and Fuerst GmbH and Co KG
Original Assignee
Huf Huelsbeck and Fuerst GmbH and 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 Huelsbeck and Fuerst GmbH and Co KG filed Critical Huf Huelsbeck and Fuerst GmbH and Co KG
Priority to EP20838106.1A priority Critical patent/EP4154403A1/fr
Priority to CN202080099307.5A priority patent/CN115398805A/zh
Publication of WO2021233569A1 publication Critical patent/WO2021233569A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H03K17/952—Proximity switches using a magnetic detector using inductive coils
    • H03K17/9537—Proximity switches using a magnetic detector using inductive coils in a resonant circuit
    • H03K17/9542—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator
    • H03K17/9545—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator with variable frequency
    • 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
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • 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
    • H03K17/952—Proximity switches using a magnetic detector using inductive coils
    • H03K2017/9527—Details of coils in the emitter or receiver; Magnetic detector comprising emitting and receiving coils
    • 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
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K2017/9706—Inductive element

Definitions

  • the present invention relates to an arrangement for a vehicle for inductive detection of an activation action.
  • the invention also relates to a method for inductive detection of an activation action.
  • the object is achieved in particular by an arrangement, preferably a circuit arrangement.
  • the arrangement according to the invention can be designed for use in a vehicle for inductive detection of an activation action.
  • the arrangement according to the invention can be attached to a vehicle component, for example.
  • the arrangement according to the invention can, for. B. be designed as a circuit arrangement with a circuit board and optionally at least one housing.
  • the activation action is, for example, an actuation of the vehicle component, preferably through a touch and / or exertion of force by a user.
  • the activation action and in particular the actuation of the vehicle component can include, for example, a touch and / or a movement and / or an exertion of force on the vehicle component, which triggers a movement of an activation means of the arrangement according to the invention.
  • a touch and / or a movement and / or an exertion of force on the vehicle component which triggers a movement of an activation means of the arrangement according to the invention.
  • touching a housing of the vehicle component can cause the activation means to move.
  • the activation means is advantageously on a housing of the vehicle component or the arrangement according to the invention attached and / or mounted movably.
  • the activating agent can be designed as an electrically conductive surface or coating on the housing.
  • the vehicle is designed as a motor vehicle, in particular as a hybrid vehicle or as an electric vehicle, preferably with a high-voltage electrical system and / or an electric motor. It can also be possible for the vehicle to be designed as a fuel cell vehicle and / or passenger vehicle and / or semi-autonomous or autonomous vehicle.
  • the vehicle has a security system which, for. B. through communication with an identification transmitter (ID transmitter) enables authentication. Depending on the communication and / or the authentication, at least one function of the vehicle can be activated. If the authentication of the ID transmitter is necessary for this, the function can be a security-relevant function, such as unlocking the vehicle or moving a flap (e.g.
  • the function and / or the authentication can be initiated when the activation action has been successfully detected by the arrangement according to the invention.
  • the arrangement according to the invention outputs a trigger signal which triggers the function and / or the authentication.
  • the trigger signal is output as a function of the detection of the activation action, for example by the processing arrangement.
  • the output takes place, for example, to a control unit of the vehicle.
  • the arrangement according to the invention can have a cable and / or a plug connection or the like in order to be releasably electrically connected to the control unit of the vehicle.
  • the security system is also designed as a passive access system, which initiates the authentication and / or the activation of a function upon detection of the approach of the ID transmitter to the vehicle without active manual actuation of the ID transmitter.
  • a wake-up signal is repeatedly sent out by the security system, which can be received by the ID transmitter when it approaches, and then triggers the authentication.
  • the arrangement according to the invention can have the following components, preferably to form an inductive sensor: a sensor arrangement, in particular with at least or exactly two or four sensor elements, for inductive detection of the activation action, to preferably (at least or exactly) a first and second (electrical) detection signal to provide, wherein the detection signals can be specific for the same detection information about the activation action, an electronic processing arrangement, such as a microcontroller, for comparing the detection signals with one another in order to determine (through the comparison) the detection information, and preferably to determine the activation action on the basis of the detection information determined to detect, in particular on the basis of a change in the detection information.
  • a sensor arrangement in particular with at least or exactly two or four sensor elements, for inductive detection of the activation action, to preferably (at least or exactly) a first and second (electrical) detection signal to provide, wherein the detection signals can be specific for the same detection information about the activation action
  • an electronic processing arrangement such as a microcontroller, for comparing the detection signals with one another in
  • the detection signals can be compared with one another in order to thereby determine the detection information.
  • the detection information can be a property of the detection signals, for example a frequency, which can be dependent on an inductance of the sensor arrangement.
  • the activation action can thus be designed to change the detection information and specifically the inductance of the sensor arrangement.
  • the processing arrangement can therefore be designed to determine the change in the inductance in order to infer the presence of the activation action therefrom. For this purpose, a degree of change z. B. be compared with a threshold value.
  • the arrangement according to the invention thus provides the function of an inductive sensor. In contrast to conventional inductive sensors, however, two detection signals are evaluated in order to improve stability and reliability.
  • the arrangement according to the invention can in particular be designed as an electronic circuit arrangement and / or an inductive sensor.
  • the detection signals can be evaluated as two (identical) periodic signals by a comparator.
  • the detection signals can be compared in that the processing arrangement, and in particular a comparator, preferably a differential comparator, measures the differential voltage of the sensor elements.
  • the detection signals can thus be used as the electrical voltages of the sensor elements Be executed sensor arrangement. This has advantages over conventional solutions that rely on an asymmetrical evaluation of the change in inductance, such as LDC sensors.
  • the detection signals can be specific for the same detection information about the activation action. This means in particular that the acquisition information can be determined from both acquisition signals (each individually), possibly also without taking the other acquisition signal into account and without performing the comparison.
  • the detection information is a frequency of the respective detection signals. The comparison of the detection signals enables the detection information to be determined with greater reliability.
  • the sensor arrangement has at least or exactly two, in particular electrically conductive, sensor elements.
  • the sensor elements can be connected symmetrically to one another (with one another) in order to generate the detection signals as symmetrical and / or differential signals, so that the detection signals preferably have the same detection information.
  • the detection signals can be transmitted to the processing arrangement and in particular to a comparator component as differential and / or symmetrical signals, in particular in the sense of symmetrical transmission, but also possibly with a (constant) phase difference to one another.
  • a phase shift of 180 ° between the detection signals enables a phase reversal of one of the detection signals to be achieved and / or that the zero crossings of the detection signals occur simultaneously, but the signs of the amplitudes are different.
  • the use of symmetrical signals can be particularly robust against interference, as these cancel each other out.
  • the circuit of the sensor arrangement and / or the entire arrangement according to the invention can be designed as symmetrically as possible in order to also design the two detection signals with a high degree of symmetry and in particular sinusoidal. Another advantage of symmetry is that temperature problems and the resulting changes have little or no negative effect.
  • the detection signals can be periodic and / or (in particular essentially) sinusoidal and / or signals that are phase-shifted with respect to one another.
  • the detection signals can alternatively or additionally as electrical voltages and / or Currents, however, be designed in the same way (as current or voltage).
  • the detection signals can, for. B. applied to respective resonant circuits as voltages, the resonant circuits being formed, among other things, by the sensor arrangement or the sensor elements.
  • the resonant circuits can form a parallel resonant circuit, the frequency of which changes as a function of the position and / or the distance between the activation means and the sensor arrangement.
  • the detection signals are designed as symmetrical, in particular mass-symmetrical, and / or antiphase electrical signals. This enables a differential evaluation of the signals, for example by a comparator component, in order to reliably determine the detection information.
  • the activation means can be actuated, in particular moved, by the activation action, and in this way change the inductance which can be measured in the sensor arrangement.
  • the comparison that is to say the differential evaluation, of the detection signals can provide the detection information in particular as information about the frequency of the detection signals. This information is correspondingly dependent and in particular proportional to the change in inductance.
  • the activation action can thus be detected, for example, by comparing the frequency with a threshold value.
  • the activation action is detected by evaluating the frequency of the detection signals and / or without evaluating the amplitude of the detection signals, that is to say that the amplitude is not evaluated. This can improve the reliability of the detection.
  • the sensor arrangement can further be possible for the sensor arrangement to have at least two sensor elements as parts of at least one resonant circuit, in particular a parallel resonant circuit, preferably in order to generate the detection signals as informational and / or periodic signals.
  • electrical energy is periodically exchanged between the components of the oscillating circuit, such as the sensor elements and at least one capacitor, so that the periodic detection signals can result therefrom.
  • the detection signals can correspond to different electrical voltages of the parallel resonant circuit, so the first detection signal z.
  • the resonant circuit and / or the sensor arrangement can furthermore have at least one capacitor in order to provide a resonance in cooperation with the sensor elements (in particular in the form of coils).
  • the resonance frequency and / or the frequency of the detection signals can then be used as detection information.
  • the detection signals result e.g. B. from the electrical oscillations (in particular periodic or repeated charge shifts) in the sensor elements, which are initiated and / or excited by the oscillator arrangement and can be influenced by the activation means.
  • the resonant circuit can be understood as a parallel resonant circuit, in particular as two symmetrically interconnected resonant circuits.
  • the detection signals are therefore specific for the frequencies of the electrical oscillations of the connected oscillating circuits.
  • a first detection signal for the oscillation in the first and a second detection signal for the oscillation in the second of the resonant circuits can be specific.
  • the resonant circuits can be constructed symmetrically so that the frequencies of the two detection signals are the same.
  • the sensor arrangement has at least two sensor elements, wherein an oscillator arrangement can be connected to the sensor elements in order to generate the detection signals as antiphase and / or differential signals.
  • the processing arrangement can have a comparator component, such as an electronic comparator, in order to compare the anti-phase detection signals with one another, i. H. in particular to switch each time the first detection signal becomes greater than the second detection signal, and vice versa.
  • the oscillator arrangement can have at least two electronic switches which switch repeatedly and one after the other, in particular in order to provide a clock for the resonant circuits of the sensor arrangement.
  • the oscillator arrangement can be controlled by the processing arrangement or it can be part of the processing arrangement.
  • the oscillator arrangement can also be designed to control the sensor elements and in particular the various oscillating circuits of the sensor arrangement in antiphase and / or to control them in such a way that the detection signals are generated in antiphase.
  • anti-phase is understood to mean a phase shift of the detection signals to one another of 180 ° C.
  • the sensor arrangement is designed as a symmetrical circuit with at least two sensor elements.
  • the sensor arrangement can, for. B. provide two resonant circuits and / or a parallel resonant circuit in which the sensor elements can provide the inductance.
  • the processing arrangement can have a comparator component, in particular an electronic comparator, for carrying out the comparison of the detection signals.
  • the comparator component is e.g. B. Part of a microcontroller. Furthermore, the comparator component can be electrically connected to the sensor elements in order to evaluate the detection signals (in particular differentially) to detect the activation action. Specifically, a first detection signal can be applied to a first input and a second detection signal can be applied to a second input of the comparator component.
  • the sensor arrangement and in particular the entire arrangement according to the invention can be designed to be at least predominantly symmetrical in terms of circuitry and geometry. In addition, geometrically the same distances between the sensor elements and a ground element with ground potential and / or the activation means (and / or the sensor elements with respect to one another) can be provided.
  • the smallest distance between the sensor elements and the mass element and / or the activation means is the same.
  • the distance from the first and / or third sensor element to the activation means can be the same as the distance from the second and / or fourth sensor element to the ground element.
  • the symmetrical design causes a high level of interference suppression.
  • the sensor elements are advantageously electrically connected to one another and preferably connected to a ground potential. It can be provided that the activation means is also electrically connected or directly connected to the ground potential.
  • connection means can be arranged spatially between the activation means and at least one of the sensor elements.
  • the connecting means is z. B. formed elastic.
  • the connecting means can have an elastic and electrically conductive material and / or a (conductive) foam and / or a spring, in particular a spiral spring.
  • the connecting means can preferably be designed as a foam pad or the like. This can result in improved interference suppression.
  • the sensor elements can be shielded.
  • the shield can z. B. extend in a ring around the sensor elements. For this purpose, at least one electrically conductive surface can be arranged on the same layers of the printed circuit board on which the sensor elements are also provided.
  • the sensor elements in particular in the form of electrical coils, can form at least one resonant circuit in order to generate the detection signals as symmetrical signals of the at least one resonant circuit and to evaluate them differentially by the comparator component, in particular an electronic comparator.
  • the evaluation can be carried out independently of a DC position of the oscillator arrangement. Negative influences from a change in temperature can also be reduced.
  • the sensor arrangement has at least or exactly two sensor elements, which are each designed as a spiral coil, and are preferably arranged spatially parallel and / or bifilar and / or electrically connected in series with one another for common inductive detection. It may be possible for the sensor elements to be connected in such a way that the electrical current flow through the sensor elements, in particular through the first and second sensor elements, and preferably through the third and fourth sensor elements, is in the same direction. With a bifilar design of the sensor elements and with opposing current flow, the magnetic fields created by the sensor elements would almost cancel each other out. With the intended connection, however, a current flow in the same direction can occur, so that the magnetic fields are strengthened.
  • the first and second sensor elements and / or the third and fourth sensor elements can thus serve at least in pairs together (cooperatively) to generate a magnetic field and thus for detection.
  • the sensor arrangement may have at least or exactly two sensor elements which are designed to detect the activation action in a first common and / or the same detection area, and advantageously to have at least or exactly two further sensor elements, which are designed to detect the activation action in a second common and / or the same detection area.
  • the first and second sensor elements can detect in the first detection area and optionally the third and fourth sensor elements can detect in the second detection area carry out.
  • a single, common activation means can be provided for both detection areas, which, as a result of the activation action, moves relative to both detection areas.
  • the sensor arrangement has at least two sensor elements, each of which is designed as a coil element, in particular to generate a magnetic field in each case and / or to change the field by approaching at least or precisely one activation means to the sensor elements Capture activation act.
  • the sensor elements can be arranged and / or connected in a bifilar manner in order to jointly (amplify) the field.
  • the magnetic field generated by the first sensor element amplifies the magnetic field generated by the second sensor element.
  • the first and second sensor elements can thus form a detection unit.
  • a third and fourth sensor element can be connected to one another in order to also form a further detection unit.
  • the first and second detection units can be arranged next to one another, whereas the sensor elements of a common detection unit can be arranged one below the other. It can be possible for all sensor elements of the arrangement according to the invention to detect the same activation action, that is to say the same movement of the activation means.
  • the sensor arrangement has at least or exactly two sensor elements which are fastened on different layers of a circuit board in order, in particular, to detect the activation action in a common and / or the same detection area.
  • the arrangement among one another on different layers makes it possible to use the sensor elements together to generate a magnetic field.
  • the circuit board is z. B. designed as a multilayer printed circuit board.
  • the sensor arrangement has at least or exactly four sensor elements, which can be attached in pairs to one another on different layers of a circuit board, wherein the pairs can be arranged next to one another, in particular in order to detect the activation action in different detection areas.
  • pairs with one another means that at least the first and second sensor element are arranged as a first pair one below the other on the different layers and at least the third and fourth sensor element as a second pair are arranged one below the other on the different layers, but the first and third Sensor element next to one another and the second and fourth sensor elements can be arranged next to one another. This enables the activation action to be recorded over a large area.
  • the sensor arrangement may also be possible for the sensor arrangement to have at least two sensor elements on different layers of a printed circuit board, the sensor elements being electrically connected to one another directly or indirectly in pairs via a through-hole contact, and in particular being directly or indirectly electrically connected to a ground potential.
  • the ground potential also referred to for short as mass or earth, can, for. B. be formed by the vehicle body (vehicle ground) or in addition to it as a circuit ground.
  • the sensor elements can be connected in series and thus generate a magnetic field particularly efficiently.
  • the center points of the coils can make electrical contact with one another via the plated-through hole.
  • an activation means is provided in order to be moved relative to the sensor arrangement by the activation action, the sensor arrangement preferably having at least two sensor elements which are arranged in an effective area with the activation means in order to change the inductance due to the movement of the activation means provide.
  • the activating agent can, for example, be designed to be electrically conductive, e.g. B. as a metal which causes the change in inductance.
  • the sensor elements can be connected as part of at least one oscillating circuit, and an oscillator arrangement for controlling the at least one oscillating circuit can be electrically connected to the sensor elements in order to detect the change in inductance, preferably so that the detection information is specific to a frequency of the at least one oscillating circuit.
  • the processing arrangement can be designed to detect the change in inductance on the basis of a change in the frequency and to detect the activation action as a function thereof. In this way it is possible to determine the movement of the activating means through the sensor elements. Functionally, this is comparable to the conventional use of buttons which are actuated by means of the activation action. However, the use of buttons is technically more complex.
  • the sensor elements also recognize the actuation of the activation means. Functional can therefore be a unit consisting of at least two or exactly two or four sensor elements and the activation means are perceived as a button.
  • the activating means is designed, for example, as a metal element, such as a metal surface or a metal strip or the like.
  • the formation of the activating means from metal has the advantage that the position of the activating means relative to the sensor arrangement influences the inductance of the sensor elements.
  • At least one resonant circuit which is at least partially formed by the sensor arrangement, can then be used to measure the change in inductance.
  • the at least one resonant circuit can be operated electrically with an oscillator arrangement, such as a free-running oscillator.
  • the activation means can be movably attached to a circuit board of the arrangement and / or to a housing of the arrangement and / or to the vehicle component.
  • the oscillator arrangement can have an oscillator such as a clock generator and / or a square-wave signal generator and / or a free-running oscillator.
  • a comparator component such as an electronic comparator can be provided which is used for comparing the detection signals by the processing arrangement.
  • the sensor arrangement forms at least one resonant circuit, in particular a parallel resonant circuit, which is influenced by the activation means.
  • the comparator can compare the two detection signals with one another and switch over after both detection signals have crossed zero, so that the processing arrangement in this way, by measuring or counting these switching processes over time, the (resonance) frequency of the oscillating circuit (s) and / or detection signals can capture.
  • the comparator can be designed as a differential comparator which compares which of the detection signals is greater.
  • both detection signals After both detection signals have (precisely) crossed zero, both detection signals have therefore changed their sign and the comparator switches over its output signal.
  • the detection signals are preferably signals in antiphase, that is to say with a phase shift of, for example, 180 °, and uniform, that is, for example, both sinusoidal.
  • the sensor arrangement forms at least one oscillating circuit and the processing arrangement is connected to the sensor arrangement in such a way that the processing arrangement forms a frequency meter for the frequency of the at least one oscillating circuit.
  • the two detection signals can each have the same information about the frequency, for example, as periodic signals, they can have the same period duration.
  • the processing arrangement can then evaluate the period duration.
  • the frequency meter makes it possible to determine the inductive component of the at least one resonant circuit, and in this way to draw conclusions about the activation action.
  • the sensor arrangement forms at least one oscillating circuit and / or the processing arrangement has a counter component in order to carry out a count based on zero crossings of the detection signals, and preferably based on a result of the counting a (in particular resonance) frequency of the to determine at least one resonant circuit which is specific for the activation action.
  • the processing arrangement can be designed as a frequency meter.
  • the differential measurement of the frequency offers the advantage of a particular stability against interference.
  • the arrangement according to the invention has at least one fastening means in order to be fastened in a door handle or in an emblem of the vehicle, preferably in order to detect the activation action in the manner of touching the door handle or emblem.
  • the fastening means can, for example, be embodied in a housing of the arrangement according to the invention.
  • the fastening means is designed as a recess for a screw or the like and / or as a positioning means such as a profile for unambiguous fastening on the vehicle.
  • the invention also relates to a method for a vehicle for inductive detection of an activation action, in particular an activation of a vehicle component. It is provided that the following steps are carried out, preferably one after the other or in any order, with some or all of the steps also being able to be carried out repeatedly: Carrying out an inductive detection of the activation action, in particular by a sensor arrangement (preferably by controlling the sensor arrangement by an oscillator arrangement) in order to provide a first and second detection signal, the detection signals being specific for the same detection information about the activation action,
  • Carrying out a comparison of the detection signals with one another in particular digitally and / or by an electronic processing arrangement, in order to determine the detection information and to detect the activation action on the basis of the detection information, in particular on the basis of a change in the detection information.
  • the method according to the invention thus has the same advantages as have been described in detail with reference to an arrangement according to the invention.
  • the method can be suitable for operating an arrangement according to the invention.
  • a vehicle component such as a door handle and / or an emblem, which has the arrangement according to the invention, is also protected.
  • FIG. 1 shows a schematic side view of a vehicle with an arrangement according to the invention, which is also shown in a detailed view with further details,
  • FIG. 11 shows a schematic visualization of the detection signals.
  • a vehicle 1 is shown with an arrangement 5 according to the invention.
  • the arrangement 5 according to the invention is integrated into a vehicle component 2, specifically a door handle 2.
  • An enlarged illustration shows that the arrangement 5 according to the invention can have a plurality of layers L1, L2, L3 which are fastened one above the other.
  • Sensor elements 11, 12 can be provided on at least or exactly two of the layers L1, L2, as will be described in more detail below.
  • a first detection area B1 and a second detection area B2 can be monitored.
  • the detection areas B1, B2 each form an inductive effective area B1, B2 at least one of the sensor elements 11, 12 and at least one activation means 20.
  • a separate activation means 20 can be provided for each detection area B1, B2, or - as shown in FIG. 1 - a common activation means 20 can be used.
  • the activating agent 20 is e.g. B. a metal element 20, which is moved relative to a circuit board 90 of the arrangement 5 according to the invention during an activation action.
  • a housing 96 can be provided on which the activating means 20 is movably mounted. At least one fastening means 95 can also be provided on the housing 96 for fastening on the vehicle 1.
  • FIG. 2 shows an arrangement 5 according to the invention for a vehicle 1 for inductive detection of an activation action, in particular an actuation of a vehicle component 2, with further details.
  • the sensor elements 11, 12 already described can be part of a sensor arrangement 10 for inductive detection of the activation action in order to provide a first and second detection signal S1, S2.
  • S1, S2 a first and second detection signal
  • FIGS. 9 and 10 the configuration of the sensor arrangement 10 shown in FIG be expanded.
  • the at least two sensor elements 11, 12, 13, 14 can be connected symmetrically. It is shown in FIG. 2 that the sensor elements 11, 12 are electrically connected to one another and are still electrically connected to a ground potential 80 at this connection point (possibly indirectly connected, as shown by a dashed line).
  • the at least two sensor elements 11, 12, 13, 14 can be part of a parallel resonant circuit, the voltages of which can be tapped as the detection signals S1, S2.
  • Further components of the sensor arrangement 10 or of the parallel resonant circuit can be at least one capacitor C and / or at least one resistor R, as is shown schematically and by way of example.
  • an oscillator arrangement 73 can be provided which is operated with a voltage source V in order to operate the parallel resonant circuit electrically. In this way, an inductance of the sensor arrangement 10 can be detected, which inductance can be changed by an approach of the activation means 20 (due to the activation action).
  • the activation action is, for example, a manual exertion of force on the activation means 20, which leads to the movement of the activation means 20.
  • An air gap 21 and / or an elastic connecting means 30 can be provided between the activation means 20 and the sensor elements 11, 12, 13, 14, which the movement in the manner of a relative movement of the activation means 20 to the sensor elements 11, 12, 13, 14 enables.
  • the activation means 20 can thus enable an inductive influencing 22 of the sensor arrangement 10.
  • the detection signals S1, S2 can thus be specific for the same detection information VS about the activation action, the detection information VS being specific for the change in inductance due to the activation action.
  • the oscillator arrangement 73 successively controls the symmetrical strands of the sensor arrangement 10 in order to generate the detection signals S1, S2 in antiphase.
  • a particularly interference-free evaluation of the detection signals S1, S2 can be made possible by a comparator component 71 in order to determine the detection information VS by comparing the detection signals S1, S2.
  • An electronic processing arrangement 70 can then detect the activation action on the basis of the detection information VS.
  • the detection information VS for a frequency of the parallel resonant circuit can Sensor arrangement 10 may be specific, the processing arrangement 70 being designed to detect the change in inductance on the basis of a change in the frequency and to detect the activation action as a function thereof.
  • the processing arrangement 70 can have a counter component 72 in order to carry out a count based on the zero crossings of the detection signals S1, S2, and to determine a frequency of the resonant circuit which is specific for the activation action based on a result of the counting.
  • the comparator component 71 compares the first detection signal S1 with the second detection signal S2, and switches the output signal (at the reference symbol VS) to a first value whenever the first detection signal S1 is greater than the second detection signal S2 and to a second value, when the second detection signal S2 is larger than the first detection signal S1.
  • the counter component 72 can then determine the frequency of the detection signals as the detection information VS.
  • the comparator component 71 and / or the counter component 72 and / or the voltage source V can be (at least partially) part of the processing arrangement 70, in particular an integrated circuit.
  • FIG. 2 illustrates the method steps of a method according to the invention.
  • an inductive detection of the activation action is carried out, in particular by the sensor arrangement 10, in order to provide a first and second detection signal S1, S2, the detection signals S1, S2 being specific for the same detection information VS about the activation action.
  • the detection signals S1, S2 are then compared, in particular by the electronic processing arrangement, in order to determine the detection information VS and to detect the activation action on the basis of the detection information VS.
  • a first and second sensor element 11, 12 are shown with further details.
  • a third and fourth sensor element 13, 14 are also shown in FIG.
  • the sensor elements 11, 12, 13, 14 can be attached to different layers L1, L2 of a circuit board 90 in order to carry out the activation action in a common, identical detection area (B1 for the sensor elements 11, 12 and B2 for the sensor elements 13, 14, see Fig. Figure 1).
  • the four sensor elements 11, 12, 13, 14 can be paired with one another on the different layers L1, L2 of the circuit board 90 be attached in order to detect the activation action in each of the different detection areas B1, B2.
  • the sensor elements 11, 12, 13, 14 on the different layers L1, L2 of the circuit board 90 can be electrically connected to one another directly or indirectly in pairs via a via 91, and in particular (via the via 91) be directly or indirectly electrically connected to a ground potential 80 on a third layer L3 of the circuit board 90.
  • a shield 40 of the sensor elements 11, 12 is formed on the circuit board 90.
  • the shield 40 can be, for. B. in the form of at least one annular electrically conductive element around the sensor elements 11, 12 (and in particular 13, 14).
  • the shielding 40 is designed for this purpose as at least one conductor track of the printed circuit board 90, which optionally has a ground potential or, alternatively, is actively controlled electrically.
  • at least one electrically conductive surface can be arranged on the same layers L1, L2, L3, L4 of the circuit board 90 on which the sensor elements 11, 12, 13, 14 are also provided.
  • the circuit board is designed, for example, as a four-layer circuit board, as shown in FIG.
  • the annular design of the shield 40 is shown in FIGS. 6 and 7 by way of example.
  • FIGS. 6, 7 as well as 9 and 10 show a top view of the layers L1, L2, which are shown in FIGS. 3 to 5 and 8 in a side sectional view through the printed circuit board 90.
  • connection means 30 may be arranged spatially between the activation means 20 and at least one of the sensor elements 11, 12 (also 13, 14).
  • the connecting means 30 is, for. B. formed elastic.
  • the connecting means 30 can have an elastically and electrically conductive material and / or a (conductive) foam and / or a spring, in particular a spiral spring.
  • the connecting means 30 can preferably be designed as a foam pad or the like. This can result in improved interference suppression.
  • the sensor elements 11, 12, 13, 14 can each be designed as a spiral coil and are spatially parallel and / or bifilar and / or electrically connected in series for common inductive detection . It may be possible for the sensor elements 11, 12, 13, 14 to be connected in such a way that the electrical current flow through the sensor elements 11, 12, 13, 14, in particular through the first 11 and second sensor element 12, and preferably through the third 13 and fourth sensor element 14, is in the same direction. In this way, the amplify generated magnetic fields.
  • FIGS. 9 and 10 the current flow is indicated by an arrow.
  • the inputs E1, E2 and outputs A1, A2 of the coils are shown.
  • the input E1 can be electrically (directly) connected to the output A2 via a plated-through hole 91.
  • the current flows from A1 via E1, then A2 and then via E2.
  • the detection signals S1, S2 generated in this way are shown schematically in FIG.
  • the phase shift of the detection signals S1, S2 by 180 ° leads to a phase reversal or to simultaneous zero crossings, although the signs of the detection signals S1, S2 differ. Counting the zero crossings now makes it possible to determine the detection information VS.

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Abstract

L'invention concerne un agencement (5) pour un véhicule (1) pour la détection inductive d'une action d'activation, en particulier un actionnement d'un composant de véhicule (2), ledit agencement comprenant : - un agencement de capteur (10) pour la détection inductive de l'action d'activation afin de fournir un premier et un second signal de détection (S1, S2), les signaux de détection (S1, S2) étant spécifiques aux mêmes informations de détection (VS) concernant l'action d'activation ; - un agencement de traitement électronique (70) pour comparer les signaux de détection (S1, S2) les uns aux autres pour déterminer les informations de détection (VS) et pour détecter l'action d'activation sur la base des informations de détection (VS).
PCT/EP2020/087905 2020-05-19 2020-12-28 Agencement pour un véhicule pour la détection inductive d'une action d'activation Ceased WO2021233569A1 (fr)

Priority Applications (2)

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EP20838106.1A EP4154403A1 (fr) 2020-05-19 2020-12-28 Agencement pour un véhicule pour la détection inductive d'une action d'activation
CN202080099307.5A CN115398805A (zh) 2020-05-19 2020-12-28 用于感应探测激活行为的车辆用装置

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DE102020113487.8A DE102020113487A1 (de) 2020-05-19 2020-05-19 Anordnung für ein Fahrzeug zur induktiven Detektion einer Aktivierungshandlung
DE102020113487.8 2020-05-19

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