EP3728988A1 - Elektronisches gerät mit induktivem sensor - Google Patents
Elektronisches gerät mit induktivem sensorInfo
- Publication number
- EP3728988A1 EP3728988A1 EP18830798.7A EP18830798A EP3728988A1 EP 3728988 A1 EP3728988 A1 EP 3728988A1 EP 18830798 A EP18830798 A EP 18830798A EP 3728988 A1 EP3728988 A1 EP 3728988A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring
- oscillation
- electronic device
- resonant circuit
- clock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
- G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
- G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
- G01D5/2066—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by movement of a single coil with respect to a single other coil
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
-
- 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
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- 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 invention relates to an electronic device with a housing and a relative to the housing movable actuator.
- Hand meters in which the actuating element actuated by a user of the device, in particular movable.
- Actuators of known devices often act directly on an electrical circuit or form part of a circuit, resulting in a complex structure as well as susceptibility to pollution. Therefore, in particular, a good electrical contact of operable by the actuating element electrical contact elements is often not ensured over a longer period.
- the actuating element comprises at least one metallic component
- the device comprises an inductive sensor for detecting a position and / or movement of the actuating element, wherein the inductive sensor comprises: a sensor coil having a first
- Measuring resonant circuit in which a first measuring vibration can be generated and a
- Vibration generator which is designed to generate an excitation oscillation and at least temporarily act on the first resonant circuit with the exciter vibration, wherein the device has an evaluation, which is adapted to a the position and / or movement of the actuating element characterizing motion information in dependence of the first Determine measuring oscillation.
- an inductive sensor advantageously allows reliable operation of the device, and at the same time a particularly low electrical energy consumption for its operation is required by the inventive design of the inductive sensor.
- an interaction of the metallic component of the actuating element with the sensor coil can be determined, and a position and / or movement of the actuating element can be determined by the evaluation device.
- the exciter vibration can advantageous to be generated very energy efficient and needs during a decay no electrical energy.
- the measuring oscillation can be generated under the action of the excitation oscillation, in particular advantageous embodiments in particular by resonance with the excitation oscillation, and therefore does not require a separate one either
- the measuring oscillation has an increasing and then decaying signal course, which can be evaluated very easily by the evaluation device, for example always between the decay and the decay, in particular when a signal maximum of the envelope of the measuring oscillation occurs.
- the aufklingende waveform shows, for example. in that the energy provided in the form of the excitation oscillation is at the first
- the resonant circuit is transmitted, whereby this is excitable to the aufklingenden oscillation, and the decaying waveform results, for example. in that the excitation oscillation itself decays, whereby - in contrast to the aufklingenden oscillation - less energy per time or no energy is transmitted to the first measuring resonant circuit, and thus this also oscillates.
- a vibration of the first measuring resonant circuit can be characterized for example by a time-varying electrical voltage applied to the sensor coil and / or by a time-varying electric current flowing through the sensor coil.
- the vibration of the first measuring resonant circuit can be characterized for example by a time-varying electrical voltage applied to the sensor coil and / or by a time-varying electric current flowing through the sensor coil.
- Evaluation device for example, evaluate the said electrical voltage and / or said electric current to determine movement information that characterize a position and / or movement of the actuating element.
- a signal maximum (eg maximum voltage) of the oscillating and decaying oscillation in comparison to eg a decaying oscillation clearly depends more strongly on an interaction of the sensor coil with the actuating element or its at least one metallic component, resulting in a greater sensitivity of the proposed measuring principle than in conventional inductive methods, resulting in more precise and disturbing influences
- the actuating element itself may, for example, not be electrically conductive, but have at least one metallic or electrically conductive component whose electrically conductive material interacts with the measuring oscillation of the first sensor coil and thus can be evaluated.
- the actuating element itself may, for example, not be electrically conductive, but have at least one metallic or electrically conductive component whose electrically conductive material interacts with the measuring oscillation of the first sensor coil and thus can be evaluated.
- Actuator itself also be at least partially or partially electrically conductive, and may optionally additionally an electrically conductive
- an evaluable by the evaluation interaction of the actuating element (or its metallic or electrically conductive component) with the sensor coil is that a caused by the Messchwingung alternating magnetic field in the region
- Sensor coil induces eddy currents in the actuator or its metallic or electrically conductive component. This can, for example, cause an attenuation of the first measuring oscillation. Depending on the arrangement of the actuating element with respect to the sensor coil, this interaction can be stronger or weaker, which can be evaluated. In particular, both a position of the actuator or its metallic or electrically conductive component.
- Actuator and movements of the actuator can be detected.
- the vibration generator is designed to generate a plurality of temporally successive excitation oscillations and to act on the first measuring resonant circuit with the plurality of excitation oscillations, resulting in particular a plurality of measuring oscillations corresponding to the number of the plurality of temporally successive excitation oscillations.
- a comparable evaluation can be carried out repeatedly, for example, whereby the accuracy can be increased in some cases and / or movements can be better recognized.
- the vibration generator is designed to generate periodically with a first clock frequency, the plurality of excitation oscillations and the first resonant circuit with the periodically generated
- the first clock frequency is between about 0.5 and about 800 flares, preferably between about 2 flats and about 100 flats, more preferably between about 5 flats and about 20 flats.
- the vibration generator is designed to act on the first measuring resonant circuit with the excitation oscillation so that the first measuring oscillation is an increasing and then decaying Vibration is. This results in a particularly sensitive evaluation as already mentioned above.
- the first measuring resonant circuit in particular for generating an evanescent and then decaying
- Measuring vibration can be brought into resonance with the exciter vibration.
- the first resonant circuit is a first LC oscillator having a first resonant frequency
- the sensor coil is an inductive element of the first LC oscillator
- a capacitive element of the first LC oscillator is connected in parallel to the sensor coil.
- Self-resonant frequency of the first LC oscillator is, from the inductance of the sensor coil and the capacitance of the capacitive element.
- the vibration generator is configured to generate the excitation vibration at a second frequency, wherein the second
- Resonant frequency of the first LC oscillator is. More preferably, the second frequency is between about 80 percent and about 120 percent of the first
- Resonant frequency of the first LC oscillator more preferably between about 95 percent and about 105 percent of the first resonant frequency.
- the vibration generator comprises a second LC oscillator and a clock adapted to apply to the second LC oscillator a first clock signal or a signal derived from the first clock signal (eg, a boosted first clock signal) has the first clock frequency and a predetermined clock length.
- the predeterminable cycle length is between about 100
- the first measuring resonant circuit in particular at least temporarily, is inductively coupled to the vibration generator. In other embodiments, the first resonant circuit is capacitive with the
- Vibration generator coupled, preferably via a coupling member, which consists of an electrical series circuit of a coupling resistor and a
- Coupling capacitor exists. As a result, the coupling impedance can be set precisely.
- the evaluation device is designed to have at least two maximum or minimum amplitude values different
- the evaluation device is configured to generate a maximum or minimum amplitude value of a first measurement oscillation of the plurality of measurement oscillations with a corresponding maximum or minimum
- Amplitude value of a second measurement oscillation of the plurality of measurement vibrations to compare, preferably the second measurement oscillation on the first
- Measuring oscillation follows, in particular directly (without that another measuring oscillation takes place between the first and second measuring oscillation) on the first
- the evaluation device is configured to compare a first amplitude value of the measurement oscillation of a first clock cycle with an amplitude value of the measurement oscillation of a second clock cycle, the comparison in particular comprising a difference formation.
- Clock cycle can be understood the course of a clock pulse and the subsequent clock break or a clock period.
- Measuring vibration can be generated, wherein the vibration generator is adapted to act on the second measuring resonant circuit at least temporarily with the exciter vibration, wherein the evaluation device is adapted to the characterizing the position and / or movement of the actuating element
- the evaluation device has a comparator which is designed to provide an amplitude value of the measuring oscillation with a
- a default value generation device is
- Default value generation device is designed in particular to the
- Default value at least temporarily a) as a static value and / or at least temporarily b) to generate in response to an amplitude value of the measurement oscillation.
- a flip-flop element is provided, whose
- a low-pass filter is provided, and an output of the
- the apparatus is designed to carry out the following steps: periodically generating a plurality of exciter oscillations, in particular decaying exciter oscillations, by means of the oscillation generator, and
- Excitation oscillations wherein in particular the first measuring resonant circuit can be acted upon by the plurality of excitation oscillations such that a) the first
- Measuring resonant circuit preferably at least approximately, is set in resonance with a respective exciter vibration and / or b) the measuring vibration is obtained as an up-sounding and then decaying vibration.
- the device has at least one
- Control function component depending on the motion information.
- the at least one functional component is a measuring device, which is designed to measure layer thicknesses, wherein the
- Measuring device is particularly adapted to measure layer thicknesses of layers of paint and / or paint and / or rubber and / or plastic on steel and / or iron and / or cast iron, and / or layers of paint and / or paint and / or Rubber and / or plastic on non-magnetic base materials such as Aluminum, and / or copper and / or brass.
- the device is designed to execute at least one layer thickness measurement by or by means of the measuring device as a function of the movement information.
- the device is designed to deactivate the oscillation generator at least temporarily, wherein in particular the device is designed to deactivate the oscillation generator at least temporarily as a function of the movement information.
- the housing has a substantially circular cylindrical basic shape, wherein the actuating element has a substantially hollow cylindrical basic shape and a first axial end of the
- Housing coaxially surrounds.
- the sensor coil is disposed within the housing and at least partially in the first axial end region.
- hollow cylindrical actuator provided a compression spring.
- the housing is hermetically sealed at least in the first axial end region.
- Figure 1 shows schematically a block diagram of an electronic device according to
- FIG. 2 schematically shows a block diagram of an electronic device according to FIG.
- FIG. 3 schematically shows a block diagram of an electronic device according to a further embodiment
- FIG. 4 schematically shows a block diagram of an inductive sensor according to FIG.
- FIG. 5A schematically shows a simplified flowchart of a method
- FIG. 5B schematically shows a simplified flowchart of a method
- FIG. 6 schematically shows a circuit diagram of an inductive sensor according to an embodiment
- FIG. 7A is a diagrammatic representation of FIG. 7A
- FIG. 7B schematically shows signal curves of an exciter oscillation and of a
- Figure 6 inductive sensor shown in a first operating state
- FIGS. 8A to 8F schematically show the waveforms shown in FIGS. 8A to 8F, each in a second operating state
- FIG. 10 schematically shows a circuit diagram of an inductive sensor according to a further embodiment
- FIG. 11 shows schematically a maximum value memory according to a
- FIG. 12A is a diagrammatic representation of FIG. 12A
- FIG. 13 is a simplified block diagram of an electronic device according to FIG. 13
- FIG. 1 schematically shows a block diagram of an electronic device 1000 according to a first embodiment.
- the device 1000 has a housing 1002 and an actuating element 1004 which can be moved relative to the housing 1002.
- the actuating element 1004 is, for example, approximately along a longitudinal axis of the
- Housing 1002 relative to the housing 1002 back and forth, compare the double arrow a1.
- a first (right in Fig. 1) axial end position of the actuating element 1004 is denoted by the reference numeral 1004, and a second (left in Fig. 1) axial end position is designated by the reference numeral 1004 ".
- Actuator 1004 has at least one metallic component, in particular under the action of an alternating magnetic field
- Eddy currents are inducible.
- Actuator 1004 may be formed entirely of metal. For others
- the actuator 1004 also have a non-metallic base body and, for example, a metallic layer, in particular a metallization of a surface of the body.
- a metallic body may be arranged on the main body of the actuating element 1004.
- the actuator 1004 is movably mounted to the housing 1002 in the manner described above, e.g. detachably connectable or (non-destructive) insoluble connectable with this.
- the actuator 1004 not or at least not permanently attached to the housing 1002, but as to hold a separate component and, if necessary, to approach the housing 1002 in order to enable the evaluation described below.
- the device 1000 further has an inductive sensor 1100 with a sensor coil 1112 for detecting a position and / or movement of the actuating element 1004, which - like the sensor coil 1112 - is preferably arranged in an inner space of the housing 1002.
- the actuator 1004 i.d.R. disposed outside of the housing 1002, regardless of whether it is attached to the housing or not.
- the inductive sensor 1100 comprises: a first measuring resonant circuit 1110 having the sensor coil 1112 (FIG. 1) in which a first measuring oscillation MS can be generated, and a vibration generator 1130 designed for this purpose is a
- the device has an evaluation device 1200, which is designed to control the position and / or movement of the actuating element 1004 (FIG. 1).
- Measuring oscillation MS to determine.
- the functionality of the evaluation device 1200 may be integrated in the inductive sensor 1100 in preferred embodiments. In other embodiments, it is also conceivable that the functionality of
- Evaluation device 1200 to realize at least partially outside of the inductive sensor 1100.
- device 1000 FOG
- Embodiments include an optional controller 1010 that controls the operation of device 1000 and one or more optional functional units 1300, 1302.
- the control unit 1010 may be configured to implement at least part of the functionality of the evaluation device 1200.
- the determined movement information Bl can advantageously be used in preferred embodiments for controlling an operation of the device 1000 and / or at least one component, for example the functional unit 1300 (FIG. 4).
- FIG. 5A shows a simplified flowchart of a method according to FIG.
- the vibration generator 1130 (FIG. 4) generates an excitation vibration ES.
- the excitation oscillation ES may, for example, be a decaying oscillation, as indicated schematically in FIG. 7A, cf. reference numeral 11.
- step 110 the vibration generator 1130 (FIG. 4) acts on the first measuring resonant circuit 1110 with the exciter oscillation ES in such a way that a first measuring oscillation 7, which recedes and decays again, cf. Fig. 7B, in the first
- step 120 the evaluation device 1200 (FIG. 4) determines a movement information B1 characterizing the position and / or movement of the activation element 1004 (FIG. 1) as a function of the first
- step 130 advantageously, e.g. an operation of the device 1000 or
- Movement information Bl are controlled.
- the functional component 1300 is activated when the actuating element 1004 of the sensor coil 1112 is approached, which according to the principle of the invention can be determined using the inductive sensor 1100. This can be done under the control of the control unit 1010, for example.
- the control unit 1010 for example.
- the movement information Bl provided by the inductive sensor 1100 can be used for example
- Control unit 1010 from a power-saving state to an operating state in which the activation of the component 1300 can be performed.
- the excitation oscillation ES and / or a measuring oscillation MS of the first measuring resonant circuit 1110 can be realized, for example, by a time-varying electrical voltage and / or by a time-varying electrical current be characterized.
- the evaluation device 1200 may, for example, evaluate an electrical voltage at the sensor coil 1112 and / or an electrical current through the sensor coil 1112 in order to detect the voltage
- an interaction of the actuating element 1004 (FIG. 1) (or its metallic or electrically conductive component) with the sensor coil 1112 that can be evaluated by the evaluation device 1200 is that a magnetic field caused by the measuring oscillation MS (FIG. 4)
- Component induced This can, for example, a damping of the first
- the resonance frequency of the first resonant circuit 1110 influenced so that instead of the aforementioned attenuation and a gain of the first measuring oscillation MS when approaching the actuator 1004 to the first sensor coil 1112 may result.
- FIG. 2 schematically shows a block diagram of an electronic device 1000a according to a second embodiment.
- the actuating element 1004a is arranged rotatably about a pivot point DP with respect to the housing 1002, so that it, for example, rotates between at least two different angular positions 1004a, 1004a ' - and can be moved, compare the double arrow a2.
- the movement information Bl what has been said above with reference to FIGS. 1, 4, 5A applies correspondingly.
- FIG. 3 schematically shows a block diagram of an electronic device 1000b according to a third embodiment.
- the actuator 1004b is i.w.
- Sensor coil 1112 is indicated by the reference numeral 1004b '.
- Sensor coil 1112 is indicated by the reference numeral 1004b '.
- the vibration generator 1130 (FIG. 4) is configured to generate a plurality of temporally successive excitation oscillations ES and to supply the first measuring circuit with the plurality of excitation oscillations apply, which in particular one of the number of a plurality of temporally successive exciter vibrations corresponding plurality of
- Measuring vibrations results. This allows a non-vanishing "measurement rate", ie the repeated determination of the movement information Bl.
- the vibration generator 1130 (FIG. 4) is configured to periodically connect the plurality of first clock frequencies
- the first clock frequency is between about 0.5 hertz and about 800 hertz, preferably between about 2 hertz and about 100 hertz, more preferably between about 5 hertz and about 20 hertz.
- the first clock frequency may, for example, define the above-mentioned measuring rate, if e.g. per movement a movement information Bl is determined.
- the first clock frequency is from the
- the excitation vibration 11 shown in Fig. 7A includes a plurality of complete (e.g., sinusoidal) ones.
- Vibration periods with the natural frequency of the vibration generator The entirety of this plurality of oscillation periods shown in FIG. 7A with the
- Natural frequency of the vibration generator is presently as "a
- Exciting vibration "ES, 11 denotes (comparable applies to the measuring vibration 7 of FIG. 7B).
- the first clock frequency indicates how often per unit of time such an excitation oscillation ES, 11 is generated.
- the first clock frequency is selected to be 10 Hertz, for example, a total of 10 excitation oscillations 11 of the type shown in Fig. 7A are generated within one second.
- a measuring rate of about 10 hertz may be expedient, because then e.g. a corresponding one ten times per second
- Movement information Bl can be determined, which ensures a sufficiently fast response for many applications, eg for the detection of a change in position of the actuating element 1004, 1004a, 1004b.
- the inductive sensor 1100 may, for example, also for detecting the position and / or
- Movement of a metallic and / or electrically conductive component of this system can be used, e.g. for forming an inductive proximity sensor.
- the vibration generator 1130 (FIG. 4) is designed to act on the first measuring resonant circuit 1110 with the exciter oscillation ES in such a way that the first measuring oscillation MS has an up-and-down oscillation
- the first measuring resonant circuit 1110 in particular for generating an evanescent and then decaying
- Measuring oscillation MS can be brought into resonance with the excitation oscillation ES.
- FIG. 5B shows a simplified flowchart of a method according to a further embodiment.
- Step 150 represents a periodic generation of several respectively decaying excitation oscillations, for example with a waveform 11 according to FIG. 7A.
- Step 160 represents the application of the first
- steps 150, 160 are present here for the sake of
- the evaluation device 1200 determines the movement information B1 as a function of one or more of the measurement oscillations previously generated by the steps 150, 160.
- At least one of its components 1010, 1300, 1302 take place as a function of the previously determined movement information B1.
- the first resonant circuit 1110 is a first LC oscillator having a first resonant frequency
- the sensor coil 1112 (FIG. 1) being an inductive element of the first LC oscillator
- a capacitive element of the first LC Oscillator is connected in parallel with the sensor coil 1112.
- the first resonance frequency which is the natural resonant frequency of the first LC oscillator, results from the inductance of the sensor coil 1112 and the capacitance of the capacitive element.
- the vibration generator 1130 is configured to generate the excitation vibration ES at a second frequency, the second frequency being between about 60 percent and about 140 percent of the first
- Resonant frequency of the first LC oscillator is, more preferably between about 80 percent and about 120 percent, more preferably between about 95 percent and about 105 percent of the first resonant frequency.
- the vibration generator 1130 (FIG. 4) comprises a second LC oscillator and a clock adapted to connect the second LC oscillator with a first clock signal or a signal derived from the first clock signal (eg, a first amplified one Clock signal) to act on, which has the first clock frequency and a predetermined clock length.
- the predetermined cycle length is between about 100 nanoseconds and about 1000 milliseconds, in particular between about 500 Nanoseconds and about 10 microseconds, more preferably about one microsecond.
- the first resonant circuit 1110 is inductively coupled to the oscillator 1130.
- this can be achieved, for example, by arranging an inductive element of the second LC oscillator with respect to the sensor coil 1112 such that the magnetic flux generated by it at least partially passes through the sensor coil 1112 in accordance with the desired degree of coupling.
- both the sensor coil 1112 and the inductive element of the second LC oscillator can be designed as a cylindrical coil for this purpose.
- Measuring resonant circuit 1110 is undesirable.
- Element of the second LC oscillator be designed so that the smallest possible interaction of its magnetic field with the sensor coil 1112 results.
- the inductive element of the second LC oscillator in this case may be formed as a micro-inductance, e.g. in the form of an SMD component.
- the first resonant circuit 1110 is capacitively coupled to the oscillator 1130, e.g. via a coupling member, which preferably consists of a series electrical connection of a coupling resistor and a coupling capacitor.
- a coupling member which preferably consists of a series electrical connection of a coupling resistor and a coupling capacitor.
- a first measuring resonant circuit 15 for example comparable to the first measuring resonant circuit 1110 described above with reference to FIG. 4, and in a third area B3
- Circuit components provided, for example, realize the functionality of the above described with reference to FIG. 4 evaluation device 1200.
- the first measuring resonant circuit 15 has a parallel circuit comprising a sensor coil 3, which corresponds for example to the sensor coil 1112 described above with reference to FIG. 1, and a capacitor 53, whereby a first LC oscillator is formed.
- the capacitor 53 together with the sensor coil 3 defines a natural resonance frequency of the first LC oscillator or
- Measuring resonant circuit and can therefore also be referred to as a resonant capacitor.
- a metallic (and / or electrically conductive) component 2 is shown schematically, the position and / or movement of which can be determined using the principle of the embodiments.
- the metallic component 2 is for example part of the actuating element 1004, 1004a,
- the first measuring resonant circuit 15 is capacitively (or capacitively and resistively) coupled via a coupling impedance, in the present case formed by a series connection of a resistor 55 and a capacitor 57, to the oscillation generator 13.
- the oscillation generator 13 is designed to act on the first measuring resonant circuit 15, preferably periodically, with excitation oscillations 11, whereby respective measuring oscillations 7 are excited in the first resonant circuit 15.
- the first measuring resonant circuit 15 can be energized via the coupling impedance 55, 57 periodically by the vibration generator 13, wherein a coupling factor by the selection of the resistance of the resistor 55 and / or the capacitance of the capacitor 57 is precisely adjustable.
- the vibration generator 13 has to generate the excitation oscillation (s) 11 an exciter resonant circuit with an inductive element, in particular a coil, 59 and a capacitor 61, which form a second LC oscillator.
- Vibration generator 13 also has a clock generator 63.
- Clock 63 is a first clock signal TS1, in Fig. 6 also indicated by the rectangular pulse 65 ("clock"), generated.
- the clock 65 has, for example, a
- Pulse duration (duty cycle) of one microsecond (ps) at a first clock frequency of 10 hertz. This corresponds to a period of 100 milliseconds (ms), the clock length indicating that for a total of 1 microsecond the first
- Clock signal TS1 has a value of e.g. logically one (or another
- non-zero amplitude value e.g. also from a value of
- the inductive sensor 1 shown in FIG. 6 is thus energized during the cycle time by means of the first clock signal TS1 and is essentially de-energized in the cycle pauses.
- the clock generator an ultra-low power clock generating module is used, which has a power consumption of less than about 30 nanoamps (nA) at an operating voltage of 3 volts. This can provide a very energy efficient inductive sensor.
- the values for the first clock frequency and / or the clock length can be chosen arbitrarily per se. If, for example, for one
- Excitement shrinkage 11 are started.
- the first clock signal TS1 controls an electrical switching element 67, for example a field-effect transistor, which in the present case is connected in series with the second LC oscillator 59, 61.
- the clock 63 or the entire sensor 1 can in preferred
- Power source can be supplied with the operating voltage V1, which is provided for example by means of a battery and / or solar cell and / or a device for energy harvesting (recording energy from the environment and possibly converting it into electrical energy).
- the sensor 1 can also supply an electrical power to its target system, e.g. of the device 1000 (FIG. 1), for example a battery (not shown), which is also the battery
- the electrical switching element 67 is turned on, e.g. a drain-source path of the example mentioned
- the excitation oscillation 11, cf. Fig. 7A In the cycle pauses of the clock 65, the first measuring resonant circuit 15 is thus supplied with the decaying excitation oscillation 11 via the coupling impedance 55, 57. As a result, this is excited to a first measuring vibration 7, cf.
- FIG. 7B in preferred embodiments, in particular resonates with the excitation oscillation 11, wherein the first
- Measuring vibration 7 preferably as rising and decaying
- Measuring oscillation 7 results.
- the measuring oscillation 7 is dependent on the sensor coil 3 on the position and / or movement of the metallic component 2, for example on the presence or absence of the component 2 in the region of the sensor coil 3 and / or one
- Measuring oscillation 7 the first measuring resonant circuit 15 (Fig. 7) is assigned a circuit group, the i.w. in the third area B3 shown in FIG. 6 is shown.
- the maximum value memory 27 stores a maximum value of an amplitude value 17 of the first measuring oscillation 7 and makes it available at its output as a memory value 25 ,
- the maximum value memory 27 is followed by a time delay element 73.
- the time delay element 73 preferably delays the memory value 25 applied to the output of the maximum value memory 27 by a period PD (FIG. 8) of the first clock signal TS1, as a result of which a delayed memory value 25 'is obtained.
- the delay takes place by means of an integrating filter.
- the time delay element 73 has a low pass.
- a default output 75 of the default value generation device VG and an output of the time delay element 73 are connected upstream of a comparator 77.
- the comparator 77 is thus the delayed memory value 25 '(ie, the delayed by one clock first maximum amplitude value 17) of a first clock pass and a second amplitude value 21 of a later clock by a second clock cycle at.
- the delayed memory value 25 ' is compared by means of the comparator 77 with the second amplitude value 21.
- the second amplitude value 21 is reduced by a corresponding threshold 29 (FIG. 7B) by means of the voltage divider VG before it acts on the comparator 77.
- the maximum value memory 27, the time delay element 73 and the comparator 77 may in some embodiments form a differentiating element that differentiates the first measuring oscillation 7 over a period of the clock 65.
- Comparator 77 generates as an output signal a set signal 79 if the default output 75 is greater than the delayed memory value 25 '.
- the comparator 77 then generates the positive set signal 79 when the differential of the first measuring vibration 7 exceeds the threshold 29. This may in some embodiments e.g. be given when the metallic component 2 is removed from the sensor coil 3 and thus no or only a smaller one
- the comparator 77 is a
- a reset input 81 b of the flip-flop element 81 is connected downstream of the clock generator 63.
- a reset input 81 b of the flip-flop element 81 is connected downstream of the flip-flop element 81, in particular a set input 81 a for setting the flip-flop element 81.
- Excitor resonant circuit 13 of the electric power source not shown (at the falling edge of the first clock signal TS1 and the clock 65), ie when the excitation oscillation 11 starts, the flip-flop element 81 is reset. If by means of the comparator 77, as described above, the removal and / or
- the flip-flop element 81 may be followed by an optional low-pass filter 83 in order to bridge times after the flip-flop element 81 has been reset by the clock 65 and reset by the set signal 79.
- On non-disappearing output signal 83 'of the low-pass filter 83 is therefore applied, for example, when the removal of the component 2 has been detected.
- This output signal 83 'can be used in further preferred embodiments for switching and / or controlling at least one component of the target system for the inductive sensor 1, for example of a device 1000 according to FIG. 1.
- the output signal 83 'can be supplied to the control unit 1010 of the device 1000, which evaluates it, for example to determine the movement information B 1 (FIG. 4) and in FIG. 4
- the output signal 83 ' may be used directly as motion information Bl.
- the output signal 83 ' may be used to place the control unit 1010 ( Figure 1) of the apparatus 1000 from a power-saving condition to an operating condition, e.g. the activation of component 1300 can be performed. This can for example be done by the
- Output signal 83 'so connected to an input of the control unit 1010, which may be, for example, a microcontroller or the like, that the output signal 83' triggers an interrupt request, which the microcontroller from the power-saving state in a active operating state offset.
- Threshold values and / or resonant frequencies of the first resonant circuit 15 or its first LC oscillator and / or the vibration generator 13 and its second LC oscillator for example. the approach or removal of the metallic ones
- Component 2 are detected.
- the maximum value memory 27 (FIG. 6) is likewise connected downstream of the clock generator 63, so that an operating state of the Maximum value memory 27 in response to the first clock signal TS1 is controllable.
- the maximum value memory 27 is preferably completely or at least partially reduced by one value in each individual clock 65.
- Delay time delay element 73 and instead provide a fixed threshold, so only to check the fixed or predefinable threshold and switch depending on it.
- a single excitation oscillation 11 (FIG. 7A) is generated which
- a single first measuring oscillation 7 or MS1 (FIG. 7B) in the first measuring resonant circuit 15 is effected.
- a calibration of the inductive sensor 1 for example by means of previous reference measurements, which an arrangement of the metallic component 2 in different positions relative to the sensor coil 3 and a corresponding evaluation of, for example, at least one
- Amplitude value of the first measurement oscillation per position have the object, can advantageously already under evaluation of a single measurement oscillation a
- Movement information Bl can be determined, which is a position of the metallic
- Component 2 describes relative to the sensor coil 3. In these embodiments, therefore, a comparison of several, for example, directly successive,
- Stimulated excitation oscillations and determines the movement information (s) as a function of the multiple measuring vibrations.
- FIG. 7 shows different waveforms of the excitation oscillation 11 and of the first measuring oscillation 7.
- a representation A (FIG. 7A) of FIG. 7 the decay of the excitation oscillation 11 can be clearly seen, which after the separation of the oscillation oscillation
- Measuring resonant circuit 15 (Fig. 6) applied by means of the excitation vibration 11 shown in Fig. 7A.
- a solid line MS1 a first measurement oscillation of a first clock cycle is shown (excited by an application with a first exciter oscillation 11 according to FIG. 7A), which has the first amplitude value 17, which is symbolized in FIG. 7 by means of a horizontal line.
- a dotted line another of the measuring oscillations 7 (excited by an application with a second exciter oscillation 11 according to FIG. 7A) is shown, which has the second amplitude value 21 for a second clock cycle, which is also symbolized in FIG. 7B by means of a horizontal line.
- the amplitude values 17 and 21 are in each case maximum values of the measuring oscillations MS1, MS2 which respectively sound and decay again per clock cycle.
- the second amplitude value 21 is higher than the first amplitude value 17 of the first clock pass. If the second amplitude value 21, the at least partially by means of the resistors 69 and 71 shown in Figure 6 and / or
- the comparator 77 Reduction of the memory value 25 exceeds predetermined threshold 29 (FIG. 7B), the comparator 77 generates the set signal 79 for setting the flip-flop element 81.
- FIG. 8 shows different signal characteristics A to F of various signals of the inductive sensor 1 exemplified in FIG. 6 in the presence of the metallic component 2 in the region of the sensor coil 3.
- FIG. 9 shows the signal characteristics shown in FIG. 8, but in the removal of the metallic component 2 of FIG the
- FIGS. 8 and 9 a total of four periods of the first clock signal TS1 (FIG. 6) and of the clock 65 are shown in each case.
- a period is denoted in FIG. 8A by the reference PD and a clock by the reference TL.
- the ratio between the clock length TL and intervening pauses P (corresponding to the period PD minus the clock length TL) or the period PD is preferred for a power-saving system
- Embodiments preferably chosen very small, s.o., For example, with values of about 1: 10000 and smaller, preferably about 1: 100000, and it is not shown to scale in Fig. 8, 9 for the sake of clarity.
- a representation B of FIGS. 8 and 9 the rising and falling of the measuring oscillation 7 is shown, in each case schematized.
- a representation C of FIGS. 8 and 9 the setting signal 79 provided at the output of the comparator 77 and respectively applied to the set input 81 a of the flip-flop element 81 is shown.
- a signal present at the reset input 81 b of the flip-flop element 81 is shown, which corresponds to the first clock signal TS 1 or the clock 65.
- a representation E of Figures 8 and 9 is in each case the
- the flip-flop element 81 is reset per clock cycle 65 and has the reset memory state continuously as shown in FIG. 8E.
- FIG. 8B after each end (falling edge) of the respective clock 65 one of the measuring oscillations 7 begins which, due to the presence of the metallic component 2, each have identical maximum amplitude values, which is symbolized in FIG. 8B by means of a dashed horizontal line 2T , These maximum amplitude values 2T
- Vibration periods of the respective measurement vibration in particular directly at the transition from the Aufklingen in the decay.
- the maximum of the amplitudes occurring in each case can be determined or stored with little effort and is already influenced by the position or movement of the metallic component 2 during the oscillations that are audible.
- sensitivity and quality of the measurement can be further improved over conventional approaches (e.g., sole consideration of evanescent vibration).
- the temporal profile of the output signal of the time delay element 73, the time-delayed memory value 25 ', is constant in steady state. This is the case, for example, when the metallic
- non-disappearing output signal namely the set signal 79
- the flip-flop element 81 is set.
- the flip-flop element 81 remains set until the next clock 65, which causes a reset.
- a measuring oscillation 7 'or the first amplitude value 17 becomes a first
- Amplitude value (preferably in each case the maximum or minimum amplitude value) of the preceding clock cycle is compared.
- the presence of the metallic component 2 in the region of the sensor coil 3 causes in some embodiments an attenuation of the measuring oscillation 7 in the sensor coil 3, in particular due to the alternating magnetic field induced in the component 2 by the measuring oscillation 7 or its associated magnetic field
- Measuring resonant circuit 15 is influenced so that it is closer to a frequency of the excitation oscillation 11 and therefore a possible resonance of the first LC Oscillator of the first measuring resonant circuit 15 with the second LC oscillator of the vibration generator 13 by the metallic component 2 more amplified than vaporized.
- the presence of the metallic component 2 can bring about an increase in the amplitude values 17, 21 and thus the setting of the flip-flop element 81.
- Figure 10 shows schematically a circuit diagram of an inductive sensor 1 a according to another embodiment, which also includes the detection of a position and / or
- the sensor 1 a has a first sensor coil 3 and a further sensor coil 5, wherein the metallic
- Component 2 for the o.g. Recognition e.g. at least one of the two sensor coils 3 or 5 is guided.
- the inductive sensor 1 a of FIG. 10 has the first measuring resonant circuit 15 and a further (second) measuring resonant circuit 16. Both Meßschwing Vietnamesee 15, 16 are present in each case by an LC oscillator having the elements 3, 53 and 5, 53 'formed.
- the measuring resonant circuits 15 and 16 are connected via a respective coupling impedance 55, 57 and 55 ', 57 with the exciter resonant circuit 59, 61 of the vibration generator 13, so that both Meßschwing Vietnamesee 15 and 16 together by the
- a first measuring oscillation 7 is formed in the first measuring resonant circuit 15, and a secondary measuring oscillation 9 is formed in the second measuring resonant circuit 16.
- the first measuring resonant circuit 15 generates a first output signal 33 which is dependent on the position and / or movement of the metallic component 2.
- the second measuring resonant circuit 16 generates a second output signal 35
- Output signals 33, 35 are fed to a differential amplifier 43, which inputs from it Difference signal 31 generated. Due to the difference formation, the difference signal 31 is fundamentally robust against interfering influences on the sensor coil 3 and the further sensor coil 5 of the second measuring resonant circuit 16.
- Both sensor coils 3 and 5 may preferably be the same orientation and in particular be arranged in front of each other or next to each other.
- a distance between the two sensor coils 3, 5 may in some embodiments preferably be selected such that the metallic component 2 may act only on one of the two measuring resonant circuits 15, 16 without significantly affecting the other.
- the maximum value memory 27 and a downstream evaluation circuit 39 are constructed such that the
- the maximum value memory 27 and the evaluation circuit 39 are time-controlled for this purpose, for example by means of the clock generator 63. As a result, electrical energy can be saved.
- the maximum value memory 27 has a first partial memory 85, which is connected during the first time window 49 by means of an electrical switching element to the output of the differential amplifier 43, that is, the difference signal 31. Similarly, a second part of memory 87 during the second time window 51 is also connected by means of an electrical switching element to the output of the differential amplifier 43, that is, the difference signal 31.
- the comparator 77 compares the memory outputs of the first partial memory 85 and the second partial memory 87, ie the respective one
- the partial memory 85 and 87 can preferably be supplied by the clock 63 with electrical energy, so are in pauses of Takts 65 or in this predetermined measuring breaks substantially de-energized. This can further reduce power consumption.
- Figure 12 shows in the representations A to D different courses of the
- FIG. 12A the clock 65 is shown. It can be seen in FIG. 12B that during the cycle 65 no excitation oscillation 11 is present at the measuring resonant circuits 15 and 16. As soon as the clock 65 ends and the exciter resonant circuit is no longer energized, the decaying excitation oscillation 11 occurs. According to the representation of FIG. 12C, as a result of the excitation by means of the excitation oscillation 11, the difference signal 31 from the measuring oscillation 7 and a further measuring oscillation 9 are further
- Measuring resonant circuit 16 e.g. shown at approach of the metallic component 2.
- the approach of the metallic component 2 leads to a
- the difference signal 31 has essentially a constant fundamental oscillation without an approximation of the metallic component 2. This may be due, for example, to an electromagnetic disturbance acting on the inductive sensor 1a. Basically, the disturbance can be reduced by forming the difference signal 31, but due to a
- the difference signal 31 is in further embodiments in the first time window 49, which is symbolized in Figure 12 by means of two vertical lines compared to a course during the second time window 51, which is also symbolized in Figure 12 by means of two vertical lines considered.
- the comparator 77 generates the set signal 79 only if a maximum value of an amplitude of the difference signal 31 of the second time window 51 exceeds a maximum value of the amplitude of the difference signal 31 of the first time window 49 by the difference threshold 37.
- the first time window 49 corresponds in preferred embodiments, in particular the length of the clock 65, that is, a clock length TL, s. also Fig. 8.
- Time window 51 comprises at least a part of the by coupling, in particular
- the second time window 51 preferably connects directly to the first time window 49 and starts, for example. as soon as the clock 65 ends or the exciter oscillation 11 begins.
- the first time window 49 for the first determination of the amplitude of the difference signal 31 may be in preferred embodiments in a period of energization of the inductive element 59 or agree with this.
- the second time window 51 for the second determination of the amplitude of the difference signal 31 is in further preferred embodiments in a range of maximum amplitude, in particular highest resonance, the difference signal 31 and / or the measuring vibrations 15, 16, wherein the measurement takes place. If the first amplitude changes, for example, by a disturbance variable acting on the sensor coil 3 and / or 5, this is detected and, in preferred embodiments, matches the threshold value for the second amplitude, ie for the actual measurement for detecting the metallic component 2 on.
- a whole or at least energy transfer from the vibration generator 13 to the or the resonant circuits 15 and / or 16 instead of the capacitor 57 and / or the resistor 55 partly via an inductive energy transmission path (not shown) make.
- the coils 3 and / or 5 may optionally receive the energy directly.
- the evaluation device 1200 (FIG. 4) is designed to have at least two maximum or minimum amplitude values
- the evaluation device 1200 is configured to generate a maximum or minimum amplitude value of a first measurement oscillation 7 '(FIG. 9B) of a plurality of measurement oscillations 7', 7 ",... With a corresponding maximum or minimum amplitude value of at least one second measurement oscillation 7" to compare several measuring vibrations, preferably the second
- Measuring oscillation to the first measuring oscillation follows, in particular directly (ie, without a further measuring oscillation between the first and second measuring oscillation takes place) following the first measuring oscillation.
- FIG. 13 shows a simplified block diagram of an electronic device 1000c according to another embodiment.
- the device 1000c has a
- Function component 1300 which in the present case is a measuring device 1300, which is designed to measure layer thicknesses, wherein the
- Measuring device 1300 is in particular designed to measure layer thicknesses of layers of paint and / or paint and / or rubber and / or plastic on steel and / or iron and / or cast iron, and / or layers of paint and / or paint and / or or rubber and / or plastic on non-magnetic base materials such as Aluminum, and / or copper and / or brass.
- the device 1000c is designed as a mobile device, in particular a handheld device, and has a housing 1002 in which a control unit 1010 is provided for controlling an operation of the device 1000c and in particular of the measuring device 1300. Also arranged in the housing 1002 is an inductive sensor 1100 according to at least one of the above with reference to FIGS. 1 to 12
- the inductive sensor 1100 may have the structure according to FIG. 4, wherein a realization in terms of circuitry of at least some of the components 1130, 1110, 1200 of the inductive sensor 1100 is, for example, similar or comparable to those with reference to FIGS. 6 to 9 and / or comparable to FIG the embodiments described with reference to FIGS. 10 to 12 can be realized.
- the device 1000c is configured to be in
- the housing 10002 has a substantially circular cylindrical basic shape, wherein the actuating element 1004c presently has a substantially hollow cylindrical basic shape and a first axial
- End region 1002 a of the housing 1002 coaxially surrounds.
- a compression spring is provided, which is indicated in the present case in Figure 13 only schematically by the double arrow 1005.
- a corresponding stop for limiting the axial movement of the actuating element 1004c in a direction opposite thereto, ie to the right in FIG. 13, may optionally also be provided, but is not shown in FIG. 13 for reasons of clarity.
- the device 1000c can be gripped by a user, and the actuating element 1004c can be moved out of its rest position shown in FIG. 13 against the spring force of the compression spring 1005 in the direction of the first axial end portion 1002a of the housing 1002, so in Figure 13 to the left, to be moved.
- the actuating element 1004c approaches the first sensor coil 1112 of the inductive sensor 1100 arranged inside the housing 1002, in particular in the first axial end region 1102a, as a result of which the interaction between the actuating element 1004c or its metallic component (not shown in FIG FIG. 13) and the first sensor coil 1112 can be detected in a manner detectable by means of the inductive sensor 1100.
- a movement information B1 characterizing the position and / or movement of the actuating element 1004c is formed and output, for example, directly to the control unit 1010. which then the measuring device 1300 to perform one or more
- Layer thickness measurements activated, for example, from an energy-saving state into another operating state offset, the layer thickness measurements allows.
- the inductive sensor 1100 is used to determine when the actuating element 1004c moves back into its rest position or when it is no longer positioned in the region of the first sensor coil 1112. In this case, in further embodiments, the
- Control unit 1010 for example, the measuring device 1300 back into a
- the device 1000c is configured to deactivate, at least temporarily, the vibration generator 1130 (FIG. 4), wherein, in particular, the device 1000c is designed to deactivate the vibration generator 1130 at least temporarily as a function of the motion information.
- a signal 11, 7, in particular comprising a signal generated by the inductive sensor according to the embodiments
- the housing 1002 is hermetically sealed at least in the first axial end region 1002a.
- Embodiments are advantageously useful for providing a man-machine interface, for example, using the above-described actuator 1004, 1004a, 1004b, 1004c, wherein a metallic article or a metallic component or at least partially metallic
- the principle according to the embodiments also in devices with partially or completely hermetically sealed (airtight) encapsulated
- Housing 1002 be used because the with the measuring vibration. 7
- the proposed principle is reliably usable.
- no electrical, in particular galvanic connection between the actuating element and the inductive sensor is required.
- the actuating element or a metallic component arranged thereon need not be magnetic, so that the proposed principle can be used. Rather, it is sufficient if the magnetic field of the sensor coil eddy currents in the actuator or at least in its metallic component are inducible, thus an electrical conductivity in the
- Actuating element or at least its associated metallic component is given.
- a non-metallic medium can also be detected with respect to its position and / or movement relative to the sensor coil by the proposed principle, as long as it is electrically conductive.
- Hall sensors is not possible because of possibly existing magnetic particles. Also, applications that require haptic feedback, encapsulation, and / or extremely low power consumption, such as self-powered, battery-powered, and / or mobile devices.
- Provision of devices 1000 with a very energy-efficient detection of a position and / or movement of at least one actuating element are conceivable, the position and / or movement of which can be determined by one or possibly also a plurality of inductive sensors of the type described.
- detecting a movement is to be interpreted broadly, in particular can be understood as whether a distance between the actuator and the at least one sensor coil is static and / or increases and / or decreases, whether the actuator moves towards the coil and / or there is present and / or moved away from it and / or is not present there.
- other evaluations are possible, for example by means of fixed or dynamically readjusted thresholds for a
- the amplitude values are preferably determined as respective maximum amplitude values, that is to say between fading and decay of the respective measuring oscillation, for example when a signal maximum of the respective measuring oscillation occurs.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
- Electronic Switches (AREA)
Abstract
Description
Claims
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DE102017130822 | 2017-12-20 | ||
DE102018211025.5A DE102018211025A1 (de) | 2017-12-20 | 2018-07-04 | Elektronisches Gerät mit induktivem Sensor |
PCT/EP2018/085929 WO2019121974A1 (de) | 2017-12-20 | 2018-12-19 | Elektronisches gerät mit induktivem sensor |
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EP3728988A1 true EP3728988A1 (de) | 2020-10-28 |
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EP18830798.7A Withdrawn EP3728988A1 (de) | 2017-12-20 | 2018-12-19 | Elektronisches gerät mit induktivem sensor |
EP18830466.1A Withdrawn EP3728987A1 (de) | 2017-12-20 | 2018-12-19 | Elektronisches gerät mit sensor |
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US (1) | US20210164766A1 (de) |
EP (2) | EP3728988A1 (de) |
DE (3) | DE102018211025A1 (de) |
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KR102315414B1 (ko) * | 2019-07-18 | 2021-10-21 | 주식회사 다모아텍 | 인덕티브 센싱과 정전용량형 센싱을 이용하는 터치 포스 센서 및 그 동작 방법 |
CN113595544B (zh) * | 2021-08-06 | 2024-05-24 | 杭州嘉隆物联网科技有限公司 | 一种电感式全密封防爆键盘系统及使用方法 |
FR3131957B1 (fr) * | 2022-01-17 | 2024-01-05 | St Microelectronics Grenoble 2 | Excitation et lecture d'un réseau d'oscillateurs LC |
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DE857278C (de) * | 1941-06-07 | 1952-11-27 | Philips Nv | Vorrichtung zur magnetischen Bestimmung der Staerke einer aus unmagnetischem oder schwach magnetischem Material bestehenden Schicht |
DE2345848C3 (de) * | 1973-09-12 | 1986-06-19 | ELEKTRO-PHYSIK Hans Nix & Dr.-Ing. E. Steingroever GmbH & Co KG, 5000 Köln | Elektromagnetischer Schichtdickenmesser |
DE3318900A1 (de) * | 1983-05-25 | 1984-11-29 | Werner Turck Gmbh & Co Kg, 5884 Halver | Annaeherungsschalter mit minimalem strombedarf |
DE4137485A1 (de) * | 1991-11-14 | 1993-05-19 | Schering Ag | Schaltvorrichtung |
DE29620044U1 (de) * | 1996-11-19 | 1997-01-09 | List Magnetik Dipl Ing Heinric | Schichtdicken-Meßgerät |
ES2297359T3 (es) | 2004-03-26 | 2008-05-01 | Senstronic, S.A. | Sensor de proximidad inductivo. |
-
2018
- 2018-07-04 DE DE102018211025.5A patent/DE102018211025A1/de not_active Ceased
- 2018-07-04 DE DE102018211029.8A patent/DE102018211029A1/de not_active Withdrawn
- 2018-07-04 DE DE202018006650.8U patent/DE202018006650U1/de active Active
- 2018-12-19 EP EP18830798.7A patent/EP3728988A1/de not_active Withdrawn
- 2018-12-19 WO PCT/EP2018/085954 patent/WO2019121988A1/de unknown
- 2018-12-19 WO PCT/EP2018/085929 patent/WO2019121974A1/de active Search and Examination
- 2018-12-19 US US16/772,876 patent/US20210164766A1/en not_active Abandoned
- 2018-12-19 EP EP18830466.1A patent/EP3728987A1/de not_active Withdrawn
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DE202018006650U1 (de) | 2021-10-21 |
WO2019121974A1 (de) | 2019-06-27 |
EP3728987A1 (de) | 2020-10-28 |
WO2019121988A1 (de) | 2019-06-27 |
US20210164766A1 (en) | 2021-06-03 |
DE102018211025A1 (de) | 2019-06-27 |
DE102018211029A1 (de) | 2019-06-27 |
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