EP2776867A2 - Détection d'objet - Google Patents

Détection d'objet

Info

Publication number
EP2776867A2
EP2776867A2 EP12769974.2A EP12769974A EP2776867A2 EP 2776867 A2 EP2776867 A2 EP 2776867A2 EP 12769974 A EP12769974 A EP 12769974A EP 2776867 A2 EP2776867 A2 EP 2776867A2
Authority
EP
European Patent Office
Prior art keywords
coil
electrode
coils
electric field
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12769974.2A
Other languages
German (de)
English (en)
Inventor
Tobias Zibold
Andrej Albrecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2776867A2 publication Critical patent/EP2776867A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils

Definitions

  • the invention relates to a device for detecting an object.
  • the invention relates to a device for detecting the object based on its magnetic or electrical properties.
  • a magnetic field can be generated and checked to see if the object affects the magnetic field.
  • a non-metallic object such as a wooden beam, can be capacitively detected by its dielectric properties.
  • an electric field can be generated and checked whether the object affects the electric field. In both cases, the object is detected when the influence of the field exceeds a predetermined level.
  • the object can also be detected on the basis of its electromagnetic field.
  • a conventional AC voltage line can be detected on the basis of the surrounding electromagnetic alternating field of 50 or 60 Hz.
  • WO 2010/133328 A1 shows a metal detector according to the inductive measuring method, which comprises two transmitting coils and one receiving coil.
  • the transmitter coils are driven in such a way that their influences on the receiver coil are the same. If one of the magnetic fields of the transmitting coils is influenced by an object, the driving of the transmitting coils changes, so that the object can be detected on the basis of a control signal for the transmitting coils.
  • the sensors required for this purpose are preferably arranged in such a way that their detection ranges are superimposed. It is important to ensure that the sensors do not influence each other, so as not to reduce detection accuracy.
  • the invention solves this problem by means of a device having the features of the independent claim. Subclaims give preferred embodiments again.
  • a device for detecting an object comprises a first coil for generating a magnetic field in the region of the coil, a first electrode for generating an electric field in the region of the first electrode and an evaluation device for detecting the object on the basis of influencing the magnetic field or electric field.
  • a separating device for preventing current flow through the coil is provided in order to use the first coil as the first electrode. Detection ranges of the coil and the electrode can thereby be improved
  • the sensor centers of the coil and of the electrode can be superimposed in an improved manner. This allows the object to be detected or localized with improved resolution. Also, a classifiability of the object can be improved on the basis of its dielectric or magnetic properties. An area required for the sensors may be reduced. As a result, reduced production costs are possible.
  • the device can also be used with several coils in different embodiments.
  • the device comprises Furthermore, a further first coil for generating a further magnetic field in the region of the further first coil, a further first electrode for generating a further electric field in the region of the further first electrode and a further separating device for preventing a Stromflus- ses by the further first coil, wherein as a further first electrode, the further first coil is used.
  • the magnetic and the dielectric properties of the object can be determined by means of a push-pull circuit, which is connected to the two coils, to perform a magnetic or capacitive measurement.
  • the device further comprises a second coil for determining the magnetic field.
  • the device may further comprise a further first electrode for generating a further electric field in the region of the further first electrode, wherein the second coil is used as a further first electrode.
  • the device further comprises a second electrode for determining an electric field.
  • the device comprises, in addition to the second coil and the second electrode, a further separating device for preventing current flow through the second coil, the second coil being used as the second electrode.
  • a receiving coil when using a push-pull circuit so a receiving coil can be used simultaneously or alternately as an electrode for the capacitive detection of the object. Since the current through the receiving coil for determining the magnetic field is much lower than the current through the coil for generating the electric field, the current through the receiving coil can already be considered inhibited when a very high-impedance measurement, for example by means of a transistor, is performed .
  • the first and second coils used as electrodes for generating the electric fields lie in one plane, and another first coil for generating a magnetic field is arranged in a parallel plane.
  • the parallel plane is preferably opposite the object with respect to the first plane.
  • a shielding electrode is arranged between the planes.
  • the electric field can thus be prevented from being short-circuited by the further coil in the parallel plane to the second electrode.
  • the shield electrode comprises a number of parallel conductor pieces which may be electrically connected together.
  • the shielding electrode can be constructed easily and with little use of material.
  • the structure by means of conductor pieces influencing the magnetic field through the shield.
  • the coil lies in a plane, wherein the coil can be designed as a so-called print coil on a printed circuit board. Manufacturing costs for the coil can be kept low and an evaluation circuit can be constructed integrated with the coil.
  • the coil for generating the magnetic field lies in a plane, wherein the second electrode is arranged in the same plane outside the coil and the technical current direction on the coil extends from the inside to the outside.
  • the coil due to a voltage drop across the ohmic resistance of the coil, the coil only has a small capacitive base coupling to the second electrode at its outer windings. Due to the reduced base coupling, a sensitivity of the capacitive detection of the object can be improved.
  • the coil when the coil is designed as a print coil, it is advantageous if the distance between adjacent turns is not greater than the width of a turn.
  • the coil when the coil is used as an electrode, it is more electrically similar to a surface. The determination of the object by capacitive means of the electrodes can thereby be improved.
  • the coil used for the electrode for generating the electric field lies in a plane and is circulated by a guard electrode.
  • the guard electrode can also circulate both coils.
  • each of the two coils used as electrodes can also be circulated by a separate guard electrode or at least partially circulated.
  • the evaluation device is connected in a high-impedance manner to the second electrode in order to determine the alternating-voltage-carrying object on the basis of its electric field.
  • the second electrode can be used for a third measuring principle, which goes beyond the described magnetic and capacitive determination.
  • the object can thereby be detected or located in an improved manner.
  • An inventive method for detecting an object comprises steps of providing a current flow through a first coil to generate a magnetic field in the region of the first coil, the scanning of the magnetic field, the detection of the object based on an influence of the magnetic field , inhibiting the flow of current through the first coil to generate an electric field in the region of the first coil, scanning the electric field, and detecting the object based on an influence of the electric field.
  • the object can be detected or localized on the basis of its magnetic and / or dielectric properties.
  • the method is versatile and can be carried out in particular by means of the device described. In this case, parts of the method can be executed as a computer program product, for example on a programmable microcomputer.
  • the magnetic field is sampled while the current flow through the first coil is provided, and the electric field is sampled while the current flow through the first coil is sensed
  • the first coil can be used sequentially for generating or sampling a magnetic and for generating or scanning an electric field.
  • Fig. 1 is a schematic representation of a device for detecting an object
  • FIG. 2 shows an arrangement of coils of the device of FIG. 1 at different levels
  • FIG. 3 shows two coils of the arrangement of FIG. 2 in a plane with an additional shielding
  • FIGS 4 to 6 show different arrangements of electrodes and coils which can be used as electrodes.
  • the device 100 comprises a drive circuit 110 and a sensor arrangement 1 15.
  • the drive circuit 110 comprises a push-pull Circuit 120, which is connected by means of a first output 125, a second output 130 and an input 135 to the sensor arrangement 1 15.
  • Push-pull circuit 120 comprises a clock generator 140, which provides two-phase alternating-phase alternating signals of an arbitrary waveform, in particular the sinusoidal form.
  • the one output is connected by means of a first controllable amplifier 142 to the first output 125, and the other by means of a second controllable amplifier 144 to the second output 130.
  • the two amplifiers 142, 144 are set up to provide at the outputs 125 and 130, respectively, a signal whose current or
  • Voltage corresponds to the signal at the corresponding output of the clock generator 140.
  • the input 135 is connected to an input amplifier 146 for reducing the input impedance.
  • the input amplifier 146 picks up the input
  • the input amplifier 146 can be regarded as a separating device which prevents a current through a receiving device, in particular a receiving coil for determining a magnetic field.
  • an alternating electromagnetic field generated by the AC carrying object 105 may be detected by the receiving electrode 182 and the input amplifier 146.
  • the first coils 174, 176 are not energized thereby and the output of the input amplifier 146 is connected to a frequency filter in the range of approximately 50-60 Hz in order to detect as an object a power cable of a standard network installation.
  • a signal provided by the input amplifier 146 is demodulated.
  • the demodulation is effected isochronously to the clock generated by means of the clock generator 140.
  • the signal of the input amplifier 146 is applied to one of the outputs of the synchronous demodulator
  • the signals at the two outputs of the synchronous demodulator 148 are positively or negatively integrated by means of an integrator 150.
  • the integrator 150 in the illustrated exemplary embodiment is based on a comparator 152 having two capacitors 160, 162 and two resistors 164 and 168.
  • the output of the integrator 150 is provided at an interface 170 for further processing.
  • the output of the integrator 150 serves to control the two controllable amplifiers 142 and 144, with an inverter
  • the 172 ensures that the amplification factors of the amplifiers 142, 144 react in opposite directions to the signal at the output of the integrator 150. In another embodiment, only one of the amplifiers 142, 144 may be controllable.
  • the object 105 can be determined on the basis of its magnetic or dielectric properties by checking whether the signal present at the interface 170 differs sufficiently from a predetermined value.
  • the illustrated sensor arrangement 15 is adapted to support both the inductive and the capacitive measurement.
  • a first coil 174 for generating a magnetic field
  • the first transmitting coil 174 is preferably designed as a flat coil (print coil), the turns of which lie in one plane.
  • the second output 130 is connected to the inner end of another first coil
  • the first coils 174, 176 serve as transmitting coils for generating overlapping magnetic fields.
  • the switches 178, 180 serve as disconnecting means for preventing a current through the coils 176 and 176, respectively, and may be realized as transistors, for example. Also a filter element (eg an RC element) that controls the current flow for certain
  • Frequencies allowed and prohibited for others can be used as a separator.
  • the first coils 174, 176 have the illustrated D-shaped cross-sections, wherein the straight portions of both first coils 174, 176 are parallel to each other.
  • the remaining portions of the first coils 174, 176 are equidistant from a common center so that the first coils 174, 176 complement each other to a circular area, from the D-shaped center portions of the first coils 174, 176 and a strip running through the center not from the first one
  • Coils 174, 176 is covered.
  • a receiving coil or another device for determining a magnetic field in the region of the overlapping magnetic fields of the first coils 174 and 176 is not shown in FIG. 1.
  • this is preferably connected with both ends to the input 135 and to the input amplifier 146, wherein the input amplifier 146 performs a differential measurement.
  • the switches 178, 180 are closed to allow current to flow through the first coils 174, 176 required to generate the magnetic fields.
  • the technical current direction from the amplifiers 125, 130 through the first coils 174, 176 preferably extends in the winding sense from inside to outside, so that portions of the turns of the first coils 174 and 176, which are close to the receiving electrode 182, due to Ohmic resistance across the turns of the individual first coils 174, 176 only have a relatively low voltage with respect to ground. This results in a relatively low capacitive basic coupling between the first coil 174 or 176 used as capacitive electrode and the receiving electrode 182. Due to the low capacitive grounding coupling, an inductive and a capacitive measurement can be used. sung on the sensor assembly 1 15 carried out really simultaneously or in rapid succession.
  • the first coils 174, 176 are used as electrodes which generate superimposing electric fields.
  • the switches 178, 180 are opened, so that a current flow through the first coils 174, 176 is prevented, although the first coils 174, 176 are supplied by the amplifier 142, 144 with voltages.
  • the individual turns of the first coils 174 and 176 are preferably close to each other, so that the surfaces of the first coils 174, 176 can be regarded as flat electrodes, each of which builds up an electric field by means of a lying between the first coil 174, 176 Reception electrode 182 can be scanned.
  • Receiving electrode 182 for superimposing the electric field is connected to input 135 and preferably extends along the direction of the mutually parallel portions of the turns of first coils 174 and 176.
  • receives electrode 182 and each of First coils 174, 176 each arranged a shielding electrode 184.
  • the shield electrodes 184 are connected to ground and serve to keep a basic capacitance between the first coil 174 and 176 and the receiving electrode 182 low.
  • the shield electrodes 184 are preferably formed to lie in a plane with the first coils 174, 176 and the receiving electrode 182 so that the receiving electrode 182 and the first coils 174 and 176 oppose each other with respect to the respective shield electrode 184.
  • a guard electrode 186 is provided, which circulates the first coil 174 and, if present, the further first coil 176, the receiving electrode 182 and the shielding electrodes 184 in the plane in which they are located.
  • the guard electrode 186 serves to minimize stray capacitances in its interior.
  • the guard electrode 186 is tracked to the potential of the first coil 174. It is also possible to provide separate guard electrodes 186 for the first coils 174, 176, each guard electrode being connected to the potential of the first associated therewith Coil 174, 176 is guided to.
  • the first coils 174, 176 may also be only partially circumscribed by guard electrodes.
  • the guard electrode 186 is meander-shaped in that it comprises a number of electrically interconnected conductor pieces, which point radially to a center of the guard electrode 186, which preferably lies in the region of the receiving electrode 182.
  • the sensor assembly 1 15 may be used in a magnetic or capacitive manner as described above without the use of the push-pull circuit 120 for detecting the object 105.
  • a magnetic field is always constructed or determined while the switches 178, 180 are closed, so that a current flow through the first coil 176, 178 is made possible, and an electric field constructed or determined while the switches 178, 180 open are, so that the current flow is prevented.
  • An influence on the magnetic or electric fields by the object 105 can be detected by measuring the respective field in the region of the first coils 176, 178 or by monitoring the electrical parameters, such as the current, through the coils 176, 178.
  • only the first coil 176 can be used for this while the other first coil 178 is omitted.
  • FIG. 2 shows an arrangement 200 of coils of the device 100 of FIG. 1 at different levels.
  • the representation 200 comprises the coils b levels.
  • a first coil 205 and a further first coil 210 are arranged in a lower, the object 105 facing the plane. Both coils 205 and 210 are D-shaped, with mutually parallel portions of the coils 205 and 210 parallel to a first axis 215. Windings 217 of the coils 205, 210 lie in the plane and distances 219, which are enclosed in each case between adjacent turns 217, are as narrow as possible,
  • the coil 205 can be operated in particular as a first coil 174 on the device 100 of FIG.
  • a third coil 220 and a fourth coil 225 are arranged, which are formed according to the coils 205, 210 and aligned with respect to a second axis 230.
  • the coils 205, 210, 220 and 225 are formed on different levels (layers) of a printed circuit.
  • the coil 220 can in particular be operated as a further first coil 176 on the device 100 of FIG. 1.
  • the coils 210 and 225 may be used to detect the magnetic fields generated by the coils 205 and 220.
  • the coils 210 and 225 may be electrically connected to each other.
  • the coils 210, 225 which are provided for determining the magnetic field determined by the other two coils 205 and 220, may also be designed differently.
  • the coils 220, 225 may be shifted and / or rotated in the parallel plane with respect to the coils 205 and 210.
  • another device may be used, for example a Hall sensor or an AMR sensor.
  • FIG. 3 shows the coils 205 and 210, together with the structures of the receiving electrode 182 and the shielding electrodes 184 located therebetween, in conjunction with a shield 305.
  • the shield 305 preferably extends in a plane that is between the planes of the coils 205, 210 or 220, 225 is located.
  • the shield 305 is meander-shaped and comprises a plurality of straight conductor pieces 310, which preferably run parallel to the first axis 215. In this case, a region between the coils 205 and 210 is not covered by conductor pieces 310.
  • the conductor pieces 310, each associated with one of the coils 205 or 210, are electrically connected together.
  • the shield 305 is connected to ground to electrical fields in the vertical direction, that is perpendicular to the planes in which the coils 205 and 210 lie, shield.
  • the shield 305 is mounted in a separate plane of a multilayer printed circuit board (multilayer board) and correspondingly plated through in the vertical direction.
  • the coils 220 and 225 of FIG. 2 are separated by means of a separate one
  • Shield 305 with conductor pieces 310 which are parallel to the second axis 230, again shielded. Both shields 305 preferably extend between the planes in which the coil pair 205, 210 and 220, 225 is arranged. The shields 305 may be electrically connected to each other, such as by means of a via.
  • FIGS. 4 to 6 show arrangements of electrodes and coils usable as electrodes of the sensor arrangement 1 15 of FIG. 1 with reference to the coils of FIGS. 2 and 3.
  • the first coil 174, the shielding electrode 184 and the receiving electrode 182 are arranged in a plane.
  • the first coil 174 is usable as an electrode for establishing an electric field to the receiving electrode 184.
  • the field lines 405 emanating from the first coil 174 some extend flat to the shielding electrode 184, while others extend in a relatively high arc to the receiving electrode 182.
  • the field between the first coil 174 and the receiving electrode 182 can only be influenced by the object 105 when it intersects the field line 405 extending between these two elements.
  • Field lines 405, which are relatively close to the plane in which the elements 174, 184 and 182 are arranged, can not pass through the object 105 because the object 105 is too far away in the vertical direction.
  • These field lines 405 terminate at the shielding electrode 184, so that the basic capacitance between the first coil 174 and the receiving electrode 182 is reduced.
  • a dynamic measuring range for the tuning of the object 105 can thereby be increased.
  • Fig. 5 shows a similar arrangement as Fig. 4, but which is constructed symmetrically according to the illustration of FIG.
  • On both sides of the receiving electrode 182 are shielding electrodes 184, beyond which the first coils 174 and 176 are arranged, which can be used as electrodes.
  • Fig. 6 shows yet another arrangement according to that of Fig. 4, wherein the receiving electrode 182 is also formed by a coil, for example by one or both of the coils 220, 225 of Fig. 2.
  • a coil in particular a flat coil, as
  • Electrode be used for a capacitive determination of the object 105. This use can be particularly advantageous in connection with the push-pull circuit 120 of FIG. 1 succeed.
  • the sensor arrangement 15 of FIGS. 1 to 6 or their combinations can also be combined with another circuit in order to detect the object 105 either capacitively or inductively.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un dispositif pour détecter un objet, comprenant une bobine destinée à la production d'un champ magnétique au voisinage de la bobine, une première électrode destinée à la production d'un champ électrique au voisinage de l'électrode et un dispositif d'évaluation destiné à la détection de l'objet sur la base d'une influence exercée par le champ magnétique ou le champ électrique. A cet effet, un dispositif de séparation pour empêcher toute circulation d'un flux de courant dans la bobine permet d'utiliser la bobine comme électrode.
EP12769974.2A 2011-11-07 2012-09-10 Détection d'objet Withdrawn EP2776867A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011085876A DE102011085876A1 (de) 2011-11-07 2011-11-07 Objektfinder
PCT/EP2012/067600 WO2013068151A2 (fr) 2011-11-07 2012-09-10 Détection d'objet

Publications (1)

Publication Number Publication Date
EP2776867A2 true EP2776867A2 (fr) 2014-09-17

Family

ID=47010509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12769974.2A Withdrawn EP2776867A2 (fr) 2011-11-07 2012-09-10 Détection d'objet

Country Status (4)

Country Link
US (1) US20150042343A1 (fr)
EP (1) EP2776867A2 (fr)
DE (1) DE102011085876A1 (fr)
WO (1) WO2013068151A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223875A1 (de) 2012-12-20 2014-06-26 Robert Bosch Gmbh Sensor zur Ortung metallischer oder magnetischer Objekte
DE102012223872B4 (de) * 2012-12-20 2016-11-10 Robert Bosch Gmbh Sensor zur Ortung metallischer oder magnetischer Objekte
WO2016138546A2 (fr) 2015-02-27 2016-09-01 Azoteq (Pty) Ltd Détection d'inductance
JP6627472B2 (ja) * 2015-12-10 2020-01-08 オムロン株式会社 近接センサ
DE102018211100A1 (de) * 2018-07-05 2020-01-09 Continental Automotive Gmbh Verfahren und Vorrichtung zum Erkennen von Objekten

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CH548698A (de) * 1971-03-16 1974-04-30 Mueller Harro Schaltungsanordnung zur abgabe eines annaeherungssignals bei annaeherung eines menschlichen koerperteiles.
DE3476035D1 (en) * 1983-07-05 1989-02-16 Elektroniktechnologie Get Inductive sensor device and measuring device for using the same
JPH071313B2 (ja) * 1986-12-23 1995-01-11 松下電工株式会社 壁の背後部材検知装置
US5365163A (en) * 1992-09-29 1994-11-15 Minnesota Mining And Manufacturing Company Sensor array for circuit tracer
US7109726B2 (en) * 2001-07-25 2006-09-19 Koninklijke Philips Electronics N.V. Object sensing
AU2002952486A0 (en) * 2002-11-06 2002-11-21 Thorlock International Limited Probe coil for detecting nqr-responsive materials in large volumes
US7548075B2 (en) * 2004-08-31 2009-06-16 Koninklijke Philips Electronics N.V. Proximity sensor for X-ray apparatus
JP4099484B2 (ja) * 2005-02-09 2008-06-11 株式会社カイザーテクノロジー 通信システム。
DE102008035627A1 (de) * 2008-07-31 2010-02-11 Gerd Reime Vorrichtung zur kapazitiven Messung von Änderungen
US9443698B2 (en) * 2008-10-06 2016-09-13 Axcelis Technologies, Inc. Hybrid scanning for ion implantation
WO2010133501A1 (fr) 2009-05-18 2010-11-25 Sick Ag Capteur destiné à détecter des objets métalliques
DE102010028719A1 (de) * 2010-05-07 2011-11-10 Robert Bosch Gmbh Suchgerät

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See also references of WO2013068151A2 *

Also Published As

Publication number Publication date
WO2013068151A2 (fr) 2013-05-16
US20150042343A1 (en) 2015-02-12
WO2013068151A3 (fr) 2013-11-07
DE102011085876A1 (de) 2013-05-08

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