WO2023020850A1 - Dispositif de détection d'approche - Google Patents
Dispositif de détection d'approche Download PDFInfo
- Publication number
- WO2023020850A1 WO2023020850A1 PCT/EP2022/071940 EP2022071940W WO2023020850A1 WO 2023020850 A1 WO2023020850 A1 WO 2023020850A1 EP 2022071940 W EP2022071940 W EP 2022071940W WO 2023020850 A1 WO2023020850 A1 WO 2023020850A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- detection device
- approach
- user
- rods
- Prior art date
Links
- 238000013459 approach Methods 0.000 title claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims description 48
- 230000001939 inductive effect Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 230000003071 parasitic effect Effects 0.000 description 8
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10237—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the reader and the record carrier being capable of selectively switching between reader and record carrier appearance, e.g. in near field communication [NFC] devices where the NFC device may function as an RFID reader or as an RFID tag
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- 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
- G01D5/24—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 capacitance
- G01D5/2405—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 capacitance by varying dielectric
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10346—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the far field type, e.g. HF types or dipoles
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10366—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications
- G06K7/10415—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
- H04B5/43—Antennas
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
- E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
- E05B81/76—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
- E05B81/78—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles as part of a hands-free locking or unlocking operation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07777—Antenna details the antenna being of the inductive type
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
- G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
- G07C2209/64—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle using a proximity sensor
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
- G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
- G07C2209/65—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle using means for sensing the user's hand
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
- H01Q1/3241—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems particular used in keyless entry systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
Definitions
- the invention relates to an approach detection device.
- the invention applies more particularly to the detection of the approach of a hand and/or of an intelligent portable telephone (known as: “smartphone” in English) towards a bodywork element of a motor vehicle such as for example a handle of a sash or a sash pillar (door or trunk) in order to unlock the sash or to an inductive mobile phone charger, of the WPC charger type found on board motor vehicles in order to charge the phone portable.
- an intelligent portable telephone known as: “smartphone” in English
- a bodywork element of a motor vehicle such as for example a handle of a sash or a sash pillar (door or trunk)
- an inductive mobile phone charger of the WPC charger type found on board motor vehicles in order to charge the phone portable.
- vehicle door handles are equipped with devices for detecting the approach of a user's hand or a smart mobile phone.
- the detection of approach and/or contact of a member of the user for example the hand of a user on the handle coupled with the recognition of portable user equipment, for example an electronic "hand free” remote access control, worn by this user, allows the locking and unlocking of the vehicle's openings.
- portable user equipment for example an electronic "hand free” remote access control
- the door By approaching or pressing a specific location on the vehicle's door handle, called the "unlocking zone", the door (or alternatively all the openings) is (are) unlocked (unlocked) without any further action by the user .
- the user Conversely, when the user, still wearing the necessary badge and identified by the vehicle, wishes to lock his vehicle, he closes the door of his vehicle and momentarily presses another specific location on the handle, called the "locking zone". This action automatically locks the vehicle's doors.
- These one-hand approach detection devices for unlocking/locking generally comprise two capacitive sensors, in the form of two electrodes electrically connected to a printed circuit, integrated into the door handle, each in a specific zone of locking or unlocking.
- one electrode is dedicated to each zone, i.e. one electrode is dedicated to detecting the approach and/or contact of the user's hand in the locking zone and one electrode is dedicated upon detection of the approach and/or contact of the user's hand in the unlocking zone.
- This hand approach detection device further comprises a radio frequency antenna, generally LF (English abbreviation for "Low Frequency”, Low Frequency) but this antenna can also be a high or ultra high frequency antenna.
- LF Low Frequency
- this antenna can also be a high or ultra high frequency antenna.
- the detection device also comprises a vehicle electronic computer (ECU: English abbreviation for "Electronic Control Unit”) which receives a presence detection signal from the capacitive sensors.
- the vehicle's electronic computer has previously identified the user as being authorized to access this vehicle, or alternatively, following receipt of this presence detection signal, it carries out this identification. To do this, it sends an identification request to the badge (or remote control) carried by the user via the radiofrequency antenna.
- This badge sends in response, by RF waves (radio frequency) or NFC, or UWB, or Wifi, or BLE... its identification code to the vehicle's electronic computer. If the electronic computer recognizes the identification code as the one authorizing access to the vehicle, it triggers the locking/unlocking of the door (or of all the openings). If, on the other hand, the electronic computer has not received an identification code or if the identification code received is incorrect, the locking or unlocking does not take place.
- ECU English abbreviation for "Electronic Control Unit”
- the detection device When it comes to detecting the approach of a smart phone, the detection device rather comprises an NFC (Near Field communication) reader, known per se, in order to detect by radio frequency exchange at 23.6 MHz, the presence of a smart mobile phone nearby, also equipped with near-field communication means and able to receive the identifier of said phone in order to ensure that it is well recognized as being paired to the vehicle and thus proceed with locking/unlocking.
- NFC Near Field communication
- Such vehicles are therefore equipped with door handles comprising a detection device equipped with a radio frequency antenna, two electrodes connected to a first capacitive detection microcontroller dedicated to detecting the approach of a hand and an NFC reader, itself connected to a second microcontroller dedicated to the detection by NFC of a smart mobile phone, the whole being integrated into a printed circuit.
- the invention therefore proposes a method of detection as well as an associated device making it possible to overcome the drawbacks of the prior art. More particularly, the invention proposes a simple and inexpensive device making it possible both to detect the approach of a hand and the approach of a smart telephone using only NFC technology, that is to say the near field communication.
- the invention relates to a device for detecting the approach of a member of the body of a user or of portable user equipment, intended to be carried in a motor vehicle, the device being remarkable in that it includes: a. a near-field communication antenna configured to emit signals at a high frequency selected between 3 to 30 MHz, said antenna being able to detect the approach of portable user equipment and to communicate in near field with said portable equipment user .said antenna comprising at least one winding which extends continuously in the form of a set of rods in the form of a comb so that said antenna is able to generate a variation in capacitance when approaching a member of a user's body, b. Means for controlling said antenna, c.
- the winding delimits a perimeter inside which said antenna extends continuously in the form of a set of comb-shaped rods.
- the rods are in the form of copper tracks perpendicular to a length or to a width of the perimeter.
- the rods may be identical to one another.
- Said antenna may comprise rods on two opposite sides of the perimeter.
- the means for measuring an impedance variation can be in software form and measure any variation in phase, current or voltage coming from the antenna.
- the invention also relates to any vehicle door handle remarkable in that it comprises a detection device according to any one of the features listed above.
- the invention also relates to any inductive charger for portable user equipment remarkable in that it comprises a detection device according to any one of the characteristics listed above.
- the invention also applies to any remarkable motor vehicle in that it comprises a detection device according to any of the characteristics listed above.
- Figure 1 is a schematic representation of the approach detection device according to the invention
- FIG. 2 is an electronic diagram of the near-field communication antenna modified according to the invention
- FIG. 3 is a schematic representation of a vehicle door handle comprising the detection device according to the invention
- FIG. 4 is a schematic representation of an inductive charger for portable user equipment comprising the detection device according to the invention
- FIG. 5 is a schematic representation of a preferred embodiment of the detection device according to the invention.
- FIG. 6 is a schematic representation of a third embodiment of the detection device according to the invention.
- FIG. 7 is a schematic representation of the antenna control means of the detection device according to the invention
- the device D comprises a near-field communication antenna A1
- NFC Near Field Communication
- portable user equipment for example a smart mobile phone or a badge ( “also called “tag” in English) equipped with NFC communication technology.
- This type of NFC A1 antenna is associated with a microprocessor and software or other electronic means in order to be able to exchange data with the user's portable equipment.
- the approach detection of portable user equipment towards the detection device D is carried out by measuring the impedance variation of the NFC antenna A1. This is known to those skilled in the art and will not be further detailed here.
- the invention proposes that the antenna A1 comprises at least one winding E1, E2, E3 and that it extends continuously in the form of at least one set of comb-shaped rods 01, 02.. Oi, and N1, N2... Ni, connected to control means 10.
- Rods are copper-shaped tracks of predetermined width, for example flattened wires or strips of copper, which are connected to each other and which constitute incursions, protrusions , growths, extensions of the NFC A1 antenna itself made up of a copper track.
- the NFC antenna A1 may comprise a plurality of windings E1, E2, E3 of square, rectangular, oval or round shape.
- the windings E1, E2, E3 of the NFC antenna A1 are three in number and are represented in rectangular shape without this being limiting.
- the NFC A1 antenna comprises three windings E1, E2, E3, connected to control means 10.
- the NFC A1 antenna is extended via two connections J1, J2 connected to the means control 10 by forming two sets of rods 01, 02, ... Oi and N1, N2, ... Ni.
- rods 01 , 02, ... Oi or N1 , N2, ... Ni. of each respective set are identical to each other and all the rods of the two sets are parallel to each other.
- the rods 01, 02, ... Oi and N1, N2, ... Ni can be inclined along an axis parallel to a length or a width of a rectangular winding of the NFC antenna A1 , said rods can be of different width between them, and/or of different geometry between them, and/or with spacings of different width between them.
- the winding(s) E1′, E2′, E3′ delimit(s) a perimeter inside from which said NFC AT antenna extends continuously in the form of at least one set of comb-shaped rods, in this example two sets of rods OT, 02', 03'..Oi', and NT, N2' , N3'..Ni' each of the sets being in the shape of a comb, this is illustrated in figure 5.
- the NFC AT antenna inside a rectangular perimeter defined by the ET windings E2', E3' of the NFC AT antenna; the NFC AT antenna includes two sets of OT rods, 02'...Oi'; or NT, N2', N3'... Ni' each resembling a comb.
- Each rod OT, 02', ...Oi'; of the first set is intercalated with a stem of the second set NT, N2', N3'...Ni'.
- the detection device D further comprises control means 10 of the NFC antenna A1, capable of measuring an impedance variation of said NFC antenna AT
- the control means 10 are illustrated in FIG. 7.
- Said control means 10 comprise: a voltage source Vc, an NFC driver for near-field communication (called an NFC “driver”) M1 connected to a microcontroller p then a adaptation circuit M3 comprising at least one filter and means for adjusting the impedance and frequency of the NFC antenna A1.
- the control means 20 also include a receiver circuit Rx dedicated to receiving data from the NFC antenna A1.
- control means 10 of an NFC antenna are known to those skilled in the art and will not be further detailed here.
- control means 10 also comprise impedance measuring means M2 capable of measuring any variation in the impedance of the NFC antenna A1 thus modified, as detailed below.
- the impedance variation measurement means M2 are for example included in the NFC driver M1 and are in software form, and measure any variation in the phase, current or voltage from the NFC antenna A1 in order to deduce therefrom an impedance variation of the NFC antenna A1.
- Said parasitic capacitance C2 thus generated is then measurable and can be exploited ingeniously in order to detect the approach of a member of the user's body, for example the approach of a hand of the user towards detection device D.
- the NFC antenna A1 is capable of generating a capacitance variation when approaching a member of a measurable user by means of the measurement of an impedance variation.
- FIG. 2 is shown schematically the equivalent electrical circuit of the NFC antenna A1 thus modified.
- the circuit is a "Resistance, inductance and capacitance" RLC circuit consisting of a first branch comprising a resistor R1, connected to an inductance L1, a second branch comprising a capacitance C1, a third branch comprising a parasitic capacitance C2 , all three branches being connected in parallel.
- the parasitic capacitance C2 is generated thanks to the rods of the modified NFC A1 antenna and is of greater value than the capacitance C1 which represents the capacitance created by the windings E1, E2, E3 of the NFC A1 antenna
- the RLC circuit thus formed is sensitive not only to the approach of portable user equipment but also to the approach of a member of the user's body, for example his hand.
- an inductive coupling between the NFC antenna of the portable user equipment and the NFC antenna A1 of the detection device D
- a capacitive coupling between the rods of the modified NFC A1 antenna and the metal parts of the portable equipment
- the value of each of the three parameters i.e. say the value of resistor R1, the value of parasitic capacitance C2 and the value of inductance L1.
- FIG. 6 In Figure 6 is illustrated a third embodiment of the invention, in which the rods of the NFC antenna A1 "are only two in number 01", N1", parallel to each other and connected to the NFC antenna A1 at the level of two connections J 1 ”, J2” connected to the control means 10” and to the input of the measuring means M2.
- FIG 3 is shown a vehicle door handle P V comprising the detection device D according to the invention.
- the NFC antenna A1 is located on a printed circuit 100 included in the handle P which also includes the control means 10.
- the detection device D thus makes it possible to detect the approach of portable user equipment 200 and the approach of a hand M close to the handle P in order to unlock the door.
- FIG 4 is shown an inductive charger C portable user equipment 200 comprising the detection device D according to the invention.
- the charger C comprises a first printed circuit 101 on which is located for example a ferrite F, itself located below a charging coil B1.
- the detection device D makes it possible to detect the approach of a user's hand as well as the approach of a user's portable equipment 200 near or towards the charger C .
- the invention therefore makes it possible, in an ingenious way, by modifying the NFC antenna, to be able to perform not only the approach detection of portable user equipment but also the approach detection of a hand.
- user by the judicious use of the parasitic capacitance of the antenna, the value of which is increased by modifying the layout of the NFC antenna comprising protrusions in the shape of a comb generating said increase in parasitic capacitance.
- This invention is all the more remarkable in that the impedance measurement is sufficient to detect the approach of the hand and the approach of a user's portable equipment, which was not possible in the prior art.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Lock And Its Accessories (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/683,675 US20240353240A1 (en) | 2021-08-19 | 2022-08-04 | Device for detecting an approach |
CN202280056632.2A CN117858997A (zh) | 2021-08-19 | 2022-08-04 | 用于检测接近的装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FRFR2108763 | 2021-08-19 | ||
FR2108763A FR3126276B1 (fr) | 2021-08-19 | 2021-08-19 | Dispositif de détection d’approche |
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WO2023020850A1 true WO2023020850A1 (fr) | 2023-02-23 |
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PCT/EP2022/071940 WO2023020850A1 (fr) | 2021-08-19 | 2022-08-04 | Dispositif de détection d'approche |
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US (1) | US20240353240A1 (fr) |
CN (1) | CN117858997A (fr) |
FR (2) | FR3126276B1 (fr) |
WO (1) | WO2023020850A1 (fr) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2006952A1 (fr) * | 2007-06-22 | 2008-12-24 | Semiconductor Energy Laboratory Co., Ltd. | Dispositif semi-conducteur |
US20130244577A1 (en) * | 2012-03-14 | 2013-09-19 | Continental Automotive Gmbh | Detection and near-field communication device |
KR20140119534A (ko) * | 2013-04-01 | 2014-10-10 | 엘에스산전 주식회사 | 컨덕티브 루프를 적용한 rfid 태그 |
CN206878171U (zh) * | 2017-05-12 | 2018-01-12 | 惠州Tcl移动通信有限公司 | 一种单面走线的近场通信天线及移动终端 |
CN211046573U (zh) * | 2019-12-30 | 2020-07-17 | 安波福中央电气(上海)有限公司 | 一种10瓦低辐射的车载无线充电装置 |
US20210066802A1 (en) * | 2019-08-30 | 2021-03-04 | Lite-On Electronics (Guangzhou) Limited | Nfc antenna structure and nfc circuit board and wireless charger using the same |
US20210122334A1 (en) * | 2018-07-12 | 2021-04-29 | Vitesco Technologies GmbH | Activation module simultaneously detecting the approach and pressure of a user with a movable high-frequency antenna |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013137892A1 (fr) * | 2012-03-15 | 2013-09-19 | Intel Corporation | Communication par champ proche (nfc) et capteur de proximité pour dispositifs portables |
-
2021
- 2021-08-19 FR FR2108763A patent/FR3126276B1/fr active Active
- 2021-11-22 FR FR2112322A patent/FR3126272B1/fr active Active
-
2022
- 2022-08-04 CN CN202280056632.2A patent/CN117858997A/zh active Pending
- 2022-08-04 WO PCT/EP2022/071940 patent/WO2023020850A1/fr active Application Filing
- 2022-08-04 US US18/683,675 patent/US20240353240A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2006952A1 (fr) * | 2007-06-22 | 2008-12-24 | Semiconductor Energy Laboratory Co., Ltd. | Dispositif semi-conducteur |
US20130244577A1 (en) * | 2012-03-14 | 2013-09-19 | Continental Automotive Gmbh | Detection and near-field communication device |
KR20140119534A (ko) * | 2013-04-01 | 2014-10-10 | 엘에스산전 주식회사 | 컨덕티브 루프를 적용한 rfid 태그 |
CN206878171U (zh) * | 2017-05-12 | 2018-01-12 | 惠州Tcl移动通信有限公司 | 一种单面走线的近场通信天线及移动终端 |
US20210122334A1 (en) * | 2018-07-12 | 2021-04-29 | Vitesco Technologies GmbH | Activation module simultaneously detecting the approach and pressure of a user with a movable high-frequency antenna |
US20210066802A1 (en) * | 2019-08-30 | 2021-03-04 | Lite-On Electronics (Guangzhou) Limited | Nfc antenna structure and nfc circuit board and wireless charger using the same |
CN211046573U (zh) * | 2019-12-30 | 2020-07-17 | 安波福中央电气(上海)有限公司 | 一种10瓦低辐射的车载无线充电装置 |
Also Published As
Publication number | Publication date |
---|---|
FR3126272B1 (fr) | 2023-07-07 |
CN117858997A (zh) | 2024-04-09 |
FR3126276A1 (fr) | 2023-02-24 |
US20240353240A1 (en) | 2024-10-24 |
FR3126272A1 (fr) | 2023-02-24 |
FR3126276B1 (fr) | 2025-01-31 |
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