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FR3101161B1 - Distance measurement based on phase and travel time - Google Patents

Distance measurement based on phase and travel time Download PDF

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Publication number
FR3101161B1
FR3101161B1 FR1910546A FR1910546A FR3101161B1 FR 3101161 B1 FR3101161 B1 FR 3101161B1 FR 1910546 A FR1910546 A FR 1910546A FR 1910546 A FR1910546 A FR 1910546A FR 3101161 B1 FR3101161 B1 FR 3101161B1
Authority
FR
France
Prior art keywords
travel time
identifier
vehicle
distance
radio frequency
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.)
Active
Application number
FR1910546A
Other languages
French (fr)
Other versions
FR3101161A1 (en
Inventor
Eric Leconte
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.)
Valeo Comfort and Driving Assistance SAS
Original Assignee
Valeo Comfort and Driving Assistance SAS
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 Valeo Comfort and Driving Assistance SAS filed Critical Valeo Comfort and Driving Assistance SAS
Priority to FR1910546A priority Critical patent/FR3101161B1/en
Publication of FR3101161A1 publication Critical patent/FR3101161A1/en
Application granted granted Critical
Publication of FR3101161B1 publication Critical patent/FR3101161B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G01S13/84—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted for distance determination by phase measurement
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/765—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with exchange of information between interrogator and responder
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Mesure de distance basée sur phase et temps de parcours On propose un procédé pour mesurer une distance entre un véhicule et un identifiant. Le véhicule comprend une première unité radio fréquence et l’identifiant comprend une deuxième unité radio fréquence. Le procédé comprend une mesure d’un temps de parcours entre les deux unités radio fréquence. Le procédé comprend une détermination d’une valeur estimée de la distance entre le véhicule et l’identifiant à partir du temps de parcours. Le procédé comprend, en fonction de la valeur estimée, une communication bidirectionnelle entre la première unité radio fréquence et la deuxième unité radio fréquence. Le procédé comprend une détermination, pour chaque canal de fréquence d’au moins deux canaux de fréquence, d’un déphasage respectif. Le procédé comprend en outre une détermination de la distance entre le véhicule et l’identifiant à partir des déphasages. Le procédé permet d’améliorer la mesure de la distance entre l’identifiant et le véhicule.Figure pour l’abrégé : Fig. 1Distance measurement based on phase and travel time A method is provided for measuring a distance between a vehicle and an identifier. The vehicle includes a first radio frequency unit and the identifier includes a second radio frequency unit. The method includes measuring a travel time between the two radio frequency units. The method includes determining an estimated value of the distance between the vehicle and the identifier from the travel time. The method comprises, based on the estimated value, bidirectional communication between the first radio frequency unit and the second radio frequency unit. The method includes determining, for each frequency channel of at least two frequency channels, a respective phase shift. The method further comprises determining the distance between the vehicle and the identifier from the phase shifts. The process improves the measurement of the distance between the identifier and the vehicle. 1

FR1910546A 2019-09-24 2019-09-24 Distance measurement based on phase and travel time Active FR3101161B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1910546A FR3101161B1 (en) 2019-09-24 2019-09-24 Distance measurement based on phase and travel time

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1910546A FR3101161B1 (en) 2019-09-24 2019-09-24 Distance measurement based on phase and travel time
FR1910546 2019-09-24

Publications (2)

Publication Number Publication Date
FR3101161A1 FR3101161A1 (en) 2021-03-26
FR3101161B1 true FR3101161B1 (en) 2021-08-27

Family

ID=69375445

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1910546A Active FR3101161B1 (en) 2019-09-24 2019-09-24 Distance measurement based on phase and travel time

Country Status (1)

Country Link
FR (1) FR3101161B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013913B4 (en) * 2000-03-21 2004-03-04 Delphi Technologies, Inc., Troy Method and system for determining the distance of a hand module from a device module
DE102004038836A1 (en) * 2004-08-10 2006-02-23 Siemens Ag Method for distance measurement in a wireless carrier frequency communication system and carrier frequency communication system for carrying out the method
DE102015017146A1 (en) * 2015-08-26 2017-03-02 Continental Automotive Gmbh Methods and devices for distance determination, in particular by runtime-based distance measurement with multiple devices
FR3040497B1 (en) 2015-08-31 2017-10-13 Valeo Comfort & Driving Assistance METHOD FOR DETERMINING A DISTANCE BETWEEN A VEHICLE AND A VEHICLE ACCESS AND STARTING IDENTIFIER
FR3044100B1 (en) * 2015-10-19 2018-01-05 Valeo Comfort And Driving Assistance METHOD FOR ESTIMATING DISTANCE AND ELECTRONIC UNIT FOR VEHICLE
FR3060766B1 (en) 2016-12-21 2020-05-01 Valeo Comfort And Driving Assistance METHOD AND SYSTEM FOR EVALUATING A DISTANCE BETWEEN AN IDENTIFIER AND A VEHICLE, EMBEDDED SYSTEM AND IDENTIFIER THEREFOR

Also Published As

Publication number Publication date
FR3101161A1 (en) 2021-03-26

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