EP4384844A1 - Procédé de localisation d'un émetteur d'identification d'un véhicule motorisé - Google Patents

Procédé de localisation d'un émetteur d'identification d'un véhicule motorisé

Info

Publication number
EP4384844A1
EP4384844A1 EP22750774.6A EP22750774A EP4384844A1 EP 4384844 A1 EP4384844 A1 EP 4384844A1 EP 22750774 A EP22750774 A EP 22750774A EP 4384844 A1 EP4384844 A1 EP 4384844A1
Authority
EP
European Patent Office
Prior art keywords
functional device
identification transmitter
motor vehicle
locating signal
locating
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.)
Pending
Application number
EP22750774.6A
Other languages
German (de)
English (en)
Inventor
Matthias Reinhardt
Konrad Betz
Marco Leicht
Jochen Sendler
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.)
Mercedes Benz Group AG
Original Assignee
Mercedes Benz Group AG
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 Mercedes Benz Group AG filed Critical Mercedes Benz Group AG
Publication of EP4384844A1 publication Critical patent/EP4384844A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0273—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves using multipath or indirect path propagation signals in position determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0284—Relative positioning
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/01—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations specially adapted for specific applications
    • 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
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • 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

Definitions

  • the invention relates to a method for locating an identification transmitter of a motor vehicle according to the preamble of claim 1.
  • the invention also relates to a functional device of the motor vehicle for carrying out the method.
  • the invention also relates to the motor vehicle with the functional device.
  • LF location signal (LF: Low Frequency)
  • the LF locating signal is a low-frequency signal with a frequency below 150 kHz.
  • the functional device uses the LF location signal to evaluate the distance of the key from the respective LF receiving unit and determines the position of the key in a 2D coordinate system.
  • the keyless go functionality in motor vehicles should also be implemented with an active identification transmitter, for example in the form of a smartphone.
  • the identification transmitter contains the authorization data required for the vehicle's access system and for the vehicle's drive authorization system in a memory area.
  • the identification transmitter should be able to be localized by the functional device in a manner comparable to the key.
  • a keyless go functionality can then be implemented in the motor vehicle—as with the key.
  • the smartphone or the active identification transmitter does not have an LF radio unit and it is not possible to locate the smartphone via the LF receiver units of the motor vehicle.
  • a UWB radio unit of the Smartphones or the ID transmitter (UWB: Ultra Wide Band) are used to send a UWB location signal and UWB receiving units of the motor vehicle.
  • the UWB method is a transmission method that occupies a bandwidth of at least 500 MHz.
  • the motor vehicle has fewer UWB receiving units than LF receiving units.
  • two UWB reception units are usually arranged at the front and two UWB reception units at the rear of the motor vehicle. If the smartphone is, for example, in the rear trunk or in the frunk or in the front trunk of the motor vehicle, its UWB location signal is only received by rear UWB receiver units or only by front UWB receiver units and the localization of the smartphone is therefore not always clear.
  • the object of the invention is therefore to specify an improved or at least alternative method, a corresponding functional device for carrying out the method and a motor vehicle with the functional device, in which the disadvantages described are overcome.
  • a method for locating an active identification transmitter of a motor vehicle using a functional device of the motor vehicle is provided.
  • the identification transmitter emits a locating signal and the functional device receives an original locating signal from the identification transmitter and at least one reflected locating signal from the identification transmitter.
  • the functional device determines a distance from the identification transmitter from the received original locating signal and from the at least one received reflected locating signal.
  • the functional device uses the determined distances to check whether the at least one reflected locating signal corresponds to a short-distance reflection of the original locating signal. Depending on whether the at least one reflected locating signal corresponds to a short-distance reflection of the original locating signal or not, the functional device locates the identification transmitter.
  • Locating involves determining the position of the identification transmitter in relation to the motor vehicle.
  • the original locating signal is a locating signal from the identification transmitter, which arrives from the identification transmitter on a direct path to the functional device.
  • the reflected locating signal is a locating signal of the identification transmitter, which is reflected at least once on an object on the way from the identification transmitter to the functional device.
  • the locating signal of the identification transmitter propagates over a shorter propagation path and usually over at least one further, longer propagation path.
  • the shorter propagation path results from a direct connection between the identification transmitter and the functional device.
  • the longer propagation path results from a reflection of the locating signal on a nearby object. If the identifier is outside, the nearby object can be a wall or a floor, for example.
  • the reflected locating signal covers a significantly greater distance than the original locating signal. Accordingly, the distance from the identification transmitter, which is determined using the reflected locating signal, is significantly longer than the distance from the identification transmitter, which is determined from the original locating signal itself.
  • the obvious object can be a trunk wall, for example.
  • the reflected locating signal then deposits a range that is similar to or not significantly different from the range of the original locating signal.
  • the distance of the identification transmitter, which is determined using the reflected locating signal is similar to or not significantly greater than the distance of the identification transmitter, which is determined from the original locating signal itself.
  • a short-distance reflection of the locating signal may exist if the distance associated with the reflected locating signal and the distance associated with the original locating signal differ by a factor that does not exceed a predetermined threshold factor and/or by an amount that does not exceed a predetermined threshold amount exceeds, distinguish.
  • a long-distance reflection of the original locating signal can be present if the distance associated with the reflected locating signal and the distance associated with the original locating signal differ by one factor exceeding a predetermined threshold factor and/or by an amount exceeding a predetermined threshold amount.
  • the functional device can advantageously have at least one receiving unit for receiving locating signals from the identification transmitter and an evaluation unit for evaluating the received locating signals from the identification transmitter.
  • the functional device can check whether the reflected locating signal has been reflected for a short time or for a long time and can determine from this whether the identification transmitter is located outside or in the motor vehicle.
  • the identification transmitter can be localized unambiguously as soon as the original locating signal and the at least one reflected locating signal are received by a single receiving unit of the functional device.
  • no further receiving units are required in the motor vehicle and the costs, installation space and weight of the functional device or motor vehicle can be reduced.
  • the method is simplified compared to conventional solutions and the identification transmitter can be localized more quickly or without impairing the response times.
  • the method according to the invention also reduces the energy requirement both for operating the identification transmitter and for operating the functional device.
  • the functional device can locate the identification transmitter as being in the motor vehicle if the at least one reflected locating signal corresponds to a short-distance reflection of the locating signal. If the at least one reflected locating signal does not correspond to a short-distance reflection of the original locating signal, the functional device can locate the identification transmitter as being outside the motor vehicle. As a result, the identification transmitter can be located clearly in the method and a keyless go functionality can be implemented in the motor vehicle in a simplified manner.
  • the functional device can compare the determined distances with one another and, based on this, determine whether the at least one reflected locating signal corresponds to a short-distance reflection of the locating signal or not. When comparing one distance and the other distance, the functional device can determine the at least one reflected locating signal as a short-distance reflection of the locating signal if the two distances differ by a factor that does not exceed a predetermined threshold factor, or by an amount that does not exceed a predetermined threshold amount. The functional device can also determine the number of short-distance reflections of the locating signal. If the number of short-distance reflections of the locating signal exceeds a predetermined threshold number, the functional device can locate the identification transmitter as being in the motor vehicle. If the number of short-distance reflections of the locating signal does not exceed the predetermined threshold number, then the functional device can locate the identification transmitter as being outside the motor vehicle.
  • the predetermined threshold number can be equal to one or greater than one, for example.
  • the identification transmitter transmits the UWB location signal.
  • the functional device can then receive the original UWB location signal from the identification transmitter and the at least one reflected UWB location signal from the identification transmitter and evaluate them.
  • the identification transmitter can, for example, be a so-called digital key or a smartphone with a UWB radio unit.
  • a keyless go functionality in the motor vehicle can also be implemented with a smartphone.
  • the invention also relates to a functional device of a motor vehicle for locating an identification transmitter of the motor vehicle.
  • the functional device has at least one receiving unit for receiving locating signals from the identification transmitter and an evaluation unit for evaluating the received locating signals from the identification transmitter.
  • the functional device is designed to carry out the method described above.
  • the at least one receiving unit of the functional device can be designed to receive the UWB location signals from the ID transmitter and the evaluation unit of the functional device can be designed to evaluate the received UWB location signals from the ID transmitter.
  • the identification transmitter can be a smartphone with a UWB radio unit, so that a keyless go functionality can be implemented with the smartphone in the motor vehicle.
  • the invention also relates to a motor vehicle with an identification transmitter for sending a locating signal.
  • the motor vehicle has the functional device described above for locating the identification transmitter.
  • the functional device has at least one receiving unit for receiving Locating signals from the identification transmitter and an evaluation unit for evaluating the received locating signals from the identification transmitter.
  • the at least one receiving unit of the functional device is attached to the motor vehicle on the outside.
  • the identifier can be a smartphone with a UWB radio unit for transmitting a UWB location signal.
  • the receiving unit can be designed to receive the UWB locating signals from the identification transmitter and the evaluation unit to evaluate the received UWB locating signals from the identification transmitter.
  • the functional device has at least four, preferably exactly four, UWB receiving units.
  • the at least four, preferably exactly four, UWB receiving units are then attached outside of the motor vehicle at the front adjacent to a front headlight and at the rear adjacent to a rear light on the motor vehicle. It is particularly advantageous that with the method described above, the identification transmitter can already be clearly localized with one of the at least four or exactly four UWB receiver units in the rear trunk or in the frunk or in the front trunk.
  • FIG. 1 shows a partial view of a generic motor vehicle with a generic functional device for locating an identification transmitter of the motor vehicle;
  • FIG. 2 shows a partial view of a motor vehicle according to the invention with a functional device according to the invention for locating an identification transmitter of the motor vehicle.
  • FIG. 1 shows a partial view of a generic motor vehicle 1a with a generic functional device 2a for locating an identification transmitter 3a of motor vehicle 1a.
  • the identifier 3a is shown here by a smartphone 4a for sending a UWB location signal and the functional device 2a has two front UWB receiving units 5a and two rear UWB receiving units--but not visible here.
  • the functional device 2a can locate the smartphone 4a by the distances between the smartphone 4a and the UWB receiving units 5a and the position of the smartphone 4a being determined geometrically from this.
  • the smartphone 4a is shown in FIG. 1 in two—example—positions: in the outer area 6a of the motor vehicle 1a and in a frunk 7a of the motor vehicle 1a.
  • the UWB location signal of the smartphone 4a can only be received by the front UWB receiving units 5a.
  • the functional device 2a cannot distinguish between the shown positions of the smartphone 4a in the generic method 8a since the distances between the smartphone 4a and the UWB receiving units 5a are identical in both positions.
  • another UWB receiving unit 5a is necessary here.
  • Fig. 2 shows a partial view of a motor vehicle 1 according to the invention with a functional device 2 according to the invention for locating an identification transmitter 3 of the motor vehicle 1.
  • the identification transmitter 3 is represented by a smartphone 4 for sending a UWB locating signal and the functional device 2 has two front UWB -Receiving units 5 and two rear - but not visible here - UWB receiving units.
  • the smartphone 4 is shown in two positions in FIG. 2: in the outside area 6 of the motor vehicle 1 and in a frunk 7 of the motor vehicle 1. These positions correspond to the exemplary positions shown in FIG.
  • the smartphone 4 can now be unambiguously localized without further UWB receiving units 5 .
  • the UWB receiving unit 5 receives an original UWB location signal 10 and a reflected UWB location signal 11 of the smartphone 4.
  • the original UWB location signal 10 arrives from the smartphone 4 on the direct route the UWB receiving unit 5.
  • the reflected UWB locating signal 11 is reflected once on the ground 12 on the way from the smartphone 4 to the UWB receiving unit 5—here as an example.
  • the reflected UWB location signal 11 is shown here with broken lines for better differentiation.
  • An evaluation unit of the functional device can then determine a distance from the smartphone 4 from the received UWB location signals 10 and 11 and compare them.
  • the evaluation unit evaluates the received reflected UWB locating signal 11 as no short-distance reflection of the original UWB locating signal 10 and locates the smartphone as not being in the motor vehicle 1 .
  • the UWB receiving unit 5 receives the original UWB locating signal 10 and two reflected UWB locating signals 12 and 13.
  • the reflected UWB locating signals 12 and 13 are shown here with broken lines for better differentiation.
  • the original UWB location signal 10 arrives from the smartphone 4 on the direct route to the UWB receiving unit 5.
  • the reflected UWB location signals 12 and 13 are on the way from the smartphone 4 to the UWB receiving unit 5 on the walls of the frunk 7 reflected.
  • the evaluation unit of the functional device 2 can now determine a distance from the smartphone 4 from the received UWB location signals 10, 12 and 13 and compare them with one another. However, the traversed distance for all UWB beacons 10, 12 and 13 is nearly identical or at least not significantly different. Accordingly, the distances do not differ significantly from one another.
  • the evaluation unit now evaluates the reflected UWB location signals 12 and 13 as a short-distance reflection of the original UWB location signal 10 and locates the smartphone as being in the motor vehicle 1 .
  • the reflected path / path 11 is also at a small distance from the original path, i.e. corresponds to a short-distance reflection (e.g. a reflection over the ground could not mean such a large additional path).
  • a short-distance reflection e.g. a reflection over the ground could not mean such a large additional path.
  • 13 would be a short distance from 12. Outside, one can assume that the further reflection paths take place via neighboring objects, eg a wall, and are therefore not at a short distance.
  • the smartphone 4 can be unambiguously located using a single UWB receiving unit 5 of the functional device 2 . This eliminates the need for an additional UWB receiver unit.
  • a keyless go functionality can be implemented in the motor vehicle 1 with the smartphone 4 without additional costs, additional installation space and additional weight.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention concerne un procédé (8) de localisation d'un émetteur d'identification (3) d'un véhicule motorisé (1) au moyen d'un dispositif fonctionnel (2) du véhicule motorisé (1). Dans le procédé (8), l'émetteur d'identification (3) émet un signal de localisation, et le dispositif fonctionnel (2) reçoit le signal de localisation d'origine (10) et un signal de localisation réfléchi (11, 12, 13). À partir des signaux de localisation (10, 11, 12, 13), le dispositif fonctionnel (2) détermine des distances respectives jusqu'à l'émetteur d'identification (3). Le dispositif fonctionnel (2) vérifie si le signal de localisation réfléchi (11, 12, 13) correspond ou non à une réflexion sur courte distance du signal de localisation d'origine (10). Conformément à cette vérification, le dispositif fonctionnel (2) localise l'émetteur d'identification (3). L'invention concerne également le dispositif fonctionnel (2) et le véhicule motorisé (1) comportant le dispositif fonctionnel (2).
EP22750774.6A 2021-08-10 2022-07-11 Procédé de localisation d'un émetteur d'identification d'un véhicule motorisé Pending EP4384844A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021004100.3A DE102021004100A1 (de) 2021-08-10 2021-08-10 Verfahren zum Orten eines Identifikationsgebers eines Kraftfahrzeugs
PCT/EP2022/069233 WO2023016727A1 (fr) 2021-08-10 2022-07-11 Procédé de localisation d'un émetteur d'identification d'un véhicule motorisé

Publications (1)

Publication Number Publication Date
EP4384844A1 true EP4384844A1 (fr) 2024-06-19

Family

ID=82786911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22750774.6A Pending EP4384844A1 (fr) 2021-08-10 2022-07-11 Procédé de localisation d'un émetteur d'identification d'un véhicule motorisé

Country Status (7)

Country Link
US (1) US20250147142A1 (fr)
EP (1) EP4384844A1 (fr)
JP (1) JP2024528299A (fr)
KR (1) KR20240027825A (fr)
CN (1) CN117795366A (fr)
DE (1) DE102021004100A1 (fr)
WO (1) WO2023016727A1 (fr)

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DE19957549C2 (de) * 1999-11-30 2002-04-25 Siemens Ag Diebstahlschutzsystem für ein Kraftfahrzeug und Verfahren zum Betreiben eines Diebstahlschutzsystems
US6906612B2 (en) * 2002-04-11 2005-06-14 Lear Corporation System and method for vehicle passive entry having inside/outside detection
JP4673251B2 (ja) * 2006-05-11 2011-04-20 アルプス電気株式会社 キーレスエントリー装置
JP5918101B2 (ja) * 2012-10-22 2016-05-18 株式会社東海理化電機製作所 キー位置判定装置
WO2017144346A1 (fr) 2016-02-26 2017-08-31 Huf Hülsbeck & Fürst Gmbh & Co. Kg Procédé pour activer au moins une fonction de sécurité d'un système de sécurité d'un véhicule
DE102017201960A1 (de) 2017-02-08 2018-08-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Sichern eines Fahrzeugzugangssystems für ein Kraftfahrzeug
WO2018148687A1 (fr) * 2017-02-10 2018-08-16 Apple Inc. Entrée passive améliorée de véhicule automobile
EP3385745B1 (fr) * 2017-04-06 2021-03-03 Volvo Car Corporation Procédé et système pour déterminer la position d'un dispositif d'utilisateur par rapport à un véhicule
JP6780570B2 (ja) * 2017-04-07 2020-11-04 株式会社Ｓｏｋｅｎ 車両システム用機器及び車両システム
DE102018102405A1 (de) * 2018-02-02 2019-08-08 Huf Hülsbeck & Fürst Gmbh & Co. Kg Kommunikationssystem eines Fahrzeugs
DE102018108788A1 (de) * 2018-04-13 2019-10-17 Huf Hülsbeck & Fürst GmbH & Co KG Anordnung für ein Fahrzeug
DE102018005763A1 (de) 2018-07-20 2020-01-23 Daimler Ag Verfahren zum Betreiben einer Funktionseinheit eines Kraftfahrzeugs mittels eines Identifikationssystems, bei welchem zwei Berechtigungen notwendig sind sowie Identifikationssystem
US11467275B2 (en) * 2018-12-28 2022-10-11 Logistics And Supply Chain Multi Tech R&D Centre Limited Ultra-wideband-based object identification
DE102019203029A1 (de) * 2019-03-06 2020-09-10 Volkswagen Aktiengesellschaft Verfahren zum Betreiben eines Schließsystems eines Fahrzeugs mit separater Innenraumerfassung und Außenraumerfassung einer Schlüsseleinrichtung sowie Schließsystem
CN113162875B (zh) * 2021-03-15 2023-01-06 联合汽车电子有限公司 一种人员遗留检测系统

Also Published As

Publication number Publication date
WO2023016727A1 (fr) 2023-02-16
CN117795366A (zh) 2024-03-29
DE102021004100A1 (de) 2023-02-16
KR20240027825A (ko) 2024-03-04
US20250147142A1 (en) 2025-05-08
JP2024528299A (ja) 2024-07-26

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