WO2019105850A1 - Procédé et dispositif de détermination de position de générateurs mobiles d'identification - Google Patents

Procédé et dispositif de détermination de position de générateurs mobiles d'identification Download PDF

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Publication number
WO2019105850A1
WO2019105850A1 PCT/EP2018/082309 EP2018082309W WO2019105850A1 WO 2019105850 A1 WO2019105850 A1 WO 2019105850A1 EP 2018082309 W EP2018082309 W EP 2018082309W WO 2019105850 A1 WO2019105850 A1 WO 2019105850A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
antennas
antenna
mobile identification
identification transmitter
Prior art date
Application number
PCT/EP2018/082309
Other languages
German (de)
English (en)
Inventor
Christian Morhart
Josef Schinagl
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Priority to CN201880072837.3A priority Critical patent/CN111344752A/zh
Publication of WO2019105850A1 publication Critical patent/WO2019105850A1/fr

Links

Classifications

    • 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
    • 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
    • G01S5/0252—Radio frequency fingerprinting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • B60R25/245—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user where the antenna reception area plays a role
    • 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
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • 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 and a device for determining the position of mobile identification encoders, in particular in a vehicle.
  • Keyless vehicle entry and start systems such as the Passive Start Entry (PASE) system are automated systems to unlock a vehicle without actively using a car key and start by merely pressing the start button.
  • a Sen deiser In the vehicle while a Sen deaji is arranged, which emits signals. These are, for example, electromagnetic signals in the LF (Low Frequency) or HF (High Frequency) range. These signals are received by a transponder unit when it is in the vicinity of the vehicle, and then evaluated and / or further processed. Following the evaluation and / or further processing in the transponder unit corresponding response signals can be sent back to the transmitting unit in the vehicle. The response signals are sent, for example, in the UHF frequency band and can be evaluated in the vehicle by an evaluation unit. If a response signal is recognized as correct and thus the transponder unit is identified as belonging to the vehicle, the vehicle can be unlocked or started. Other functions in the vehicle can also be controlled in this way.
  • Transponder unit determined.
  • the permitting and / or releasing of a function can then additionally depend on the position of the transponder unit. For example, a startup Operation of the vehicle only be released when the transponder unit is detected as being located inside the vehicle.
  • BLE Bluetooth
  • the known Po sitionsbetician methods can not be readily applied to the communication via Bluetooth, since signals according to a Bluetooth standard, in contrast to LF signals, for example, due to shading effects (for example, by the body of the user) can be greatly attenuated. Due to shading, the position determination with the forth conventional methods when using Bluetooth devices can be very inaccurate.
  • the object of the invention is to provide an improved device and an improved method for determining the position of mobile identification devices (portable electronic devices) be.
  • An apparatus for determining the position of a mobile identification transmitter with respect to a vehicle has a first one arranged in the mobile identification transmitter antenna and at least two antennas arranged in the vehicle.
  • the apparatus is configured to determine the reception field strengths of signals transmitted between the first antenna and the at least two antennas arranged in the vehicle, to form at least a ratio of two different measured reception field strengths, and to each of the at least one formed ratio each with at least one threshold to compare.
  • the position of the mobile identification transmitter is determined on the basis of the comparison of the at least one ratio with the at least one threshold.
  • interference of the signals or specific characteristics of the particular mobile identifier used can be compensated.
  • Specific characteristics may include, for example, the type of antennas used or the orientation of the antennas used. The determination of the position becomes more accurate and less susceptible to interference.
  • At least one antenna may be arranged in the interior of the vehicle and at least one antenna in the exterior of the vehicle.
  • At least one antenna can be arranged in the region of the hood of the vehicle and at least one antenna in the region of the trunk of the vehicle and / or an antenna in the region of the right side of the vehicle and at least one antenna Antenna may be arranged in the region of the left side of the vehicle and / or two antennas may be arranged at two obliquely opposite corners of the vehicle. This results in particularly high-contrast positions, whereby the accuracy of the position determination can be improved.
  • the ratio can be formed from two reception field strengths, which relate to antennas in the vehicle having a distance of more than 10cm, more than 50cm, more than lm or more than 2m to each other. This also results in possible high-contrast positions of the antennas, which in turn can be improved accuracy of positioning.
  • the signals can be sent to the mobile identification transmitter by the antennas arranged in the vehicle, and the mobile identification transmitter can be designed to determine the reception field strengths of the received signals.
  • the device can furthermore have a control unit, which is connected to the antennas arranged in the vehicle and which is designed to determine the reception field strengths of the received signals. The position determination can thus follow both in the vehicle and in the mobile identification transmitter.
  • the same threshold can be used for each of the ratios formed. Alternatively, however, it is also possible to use different thresholds for at least two of the ratios formed.
  • Various zones can be defined in and / or around the vehicle in which a mobile identification transmitter can be detected.
  • the thresholds may depend on the size and shape of desired zones.
  • the reception field strength with respect to an antenna arranged in the vehicle depends on the distance of the mobile identification transmitter to the corresponding antenna.
  • Each ratio can be compared to a first threshold and a second threshold. As a result, the size and shape of the zones can be changed.
  • the device can furthermore be designed to determine an attenuation of the signal between the two antennas based on a signal transmitted between two antennas arranged in the vehicle.
  • the at least one threshold may then depend, for example, on the particular attenuation.
  • a mobile identification transmitter has a first antenna and a vehicle has at least two antennas.
  • a method for determining the position of the mobile identification transmitter with respect to the vehicle comprises determining the reception field strengths of signals transmitted between the first antenna and the at least two antennas disposed in the vehicle, forming at least a ratio of two different measured reception field strengths and the Ver equalize each of the conditions formed with at least one threshold.
  • the position of the mobile identification transmitter is determined on the basis of the comparison of the conditions with the at least one threshold.
  • FIG. 1 shows a sketch of the principle of a keyless vehicle access and starting system
  • FIG. 2 shows a sketch-like depiction of different zones in a vehicle and the principle of a system for determining the position of a mobile identification transmitter
  • FIG. 3 shows in a block diagram a system for determining the position of a mobile identification transmitter according to an embodiment of the invention
  • Figure 4 in a sketchy representation of a system for
  • FIG. 5 shows a flowchart of a method for determining the position of a mobile identification transmitter according to an embodiment of the invention.
  • FIG. 1 shows a schematic representation of the principle of a keyless vehicle access and start system.
  • a transmitting unit 20 is arranged, which is adapted to emit signals. These signals are received by a transponder unit or a mobile identification encoder 30 when it is in the vicinity of the vehicle 10, and then evaluated and / or further processed.
  • Conventional transponder units are arranged in example in a vehicle key. With newer systems, however, more and more portable electronic devices (mobile identification transmitter) are taking over the functions of conventional vehicle keys.
  • Portable electronic devices may be, for example, smartphones, tablets, laptops, smartwatches or the like. Following the evaluation and / or Wei ter town in the mobile identification transmitter 30 corresponding response signals can be sent back to the transmitting unit 20.
  • the response signals can in the vehicle 10th be evaluated by a, not shown in Figure 1, evaluation.
  • the mobile identification transmitter 30 To receive the signals sent by the transmitting unit 20, the mobile identification transmitter 30 must be within a certain radius around the vehicle 10, since the transmitted signals have only a limited range. This radius can be for example 10 meters. This is just an example. The range can also be larger or smaller.
  • the transmitting unit 20 may continuously transmit signals or only to a specific event. Such an event may be, for example, touching or actuating a door handle or a vehicle start button. Any other suitable type of event is also possible. If the mobile identity transmitter 30 sends a correct response signal to a signal received by the transmitting unit 20, the vehicle 10 is unlocked.
  • the mobile identification transmitter 30 For some functions in the vehicle 10 often also the current position of the mobile identification transmitter 30 plays a role. For example, it may be necessary for the mobile identification transmitter 30 to be located inside the vehicle 10 so that the vehicle 10 can be started.
  • different zones A, B, C, D can be defined in or around the vehicle 10. This is shown by way of example in FIG. A first zone A is located, for example, in the interior of the vehicle 10. Further zones B, C, D can be defined, for example, in the area in front of the driver's door, the front passenger's door or the boot.
  • the zones A, B, C, D shown in FIG. 2 are merely examples.
  • a first zone in the interior of the vehicle 10 and a second zone in a certain radius around the vehicle 10 are defined. Both the interior and the exterior of the However, vehicles 10 may also be divided into more than one zone. For example, a zone in the area of the driver's seat and other zones can be defined in the area of the front passenger seat, the rear seat and the parcel shelf. The various zones can differ in shape and size from each other.
  • a mobile Identifika tion transmitter 30 can be detected using one or more antennas 21, 22, 23 in the vehicle 10.
  • three antennas 21, 22, 23 are shown. In the vehicle 10, however, more or less antennas may in principle be arranged at any suitable positions.
  • the control unit 40 may be configured to emit signals via one or more of the antennas 21, 22, 23. Signals received by the antennas 21, 22, 23 can in turn be sent to the control unit 40 for further evaluation. For example, signals which are received by the mobile identification transmitter 30 can be emitted by the antennas 21, 22, 23 arranged in the vehicle 10.
  • the mobile identification transmitter 30 may measure the reception field strength of each of the received signals.
  • the reception field strength of a signal decreases with increasing distance from the transmitting antenna. Since the position of the antennas in the vehicle 10 is known, the distance to the respective antennas 21, 22, 23 and thus the position of the transponder unit 30 with respect to the vehicle 10 can be determined from the received signal strengths of one or more signals received at one time ,
  • the mobile identification transmitter 30 emits signals and each of the antennas 21, 22, 23 determines the reception field strength of these signals.
  • the mobile identification transmitter 30 thus serves in this case as Transmitter and the antennas 21, 22, 23 in the vehicle 10 as a receiver. The farther the respective antenna 21, 22, 23 away from the mobile identification transmitter 30, the lower the measured reception field strength of the signals. From the measured reception field strengths, it is then possible in turn to deduce the distance of the mobile identification transmitter 30 to each of the antennas 21, 22, 23. When the distance to each one of the antennas 21, 22, 23 is known, the position of the mobile identification transmitter 30 with respect to the vehicle 10 can be deduced.
  • the exact position of the mobile identification transmitter 30 is known. It is basically sufficient to detect in which of the zones A, B, C, D the mobile identification transmitter 30 is located. For example, it can be detected that the mobile identification transmitter 30 is located in the zone A in the interior of the vehicle 10 when the received field strength measured with respect to an antenna located in the vehicle 10 exceeds a certain threshold.
  • the mobile identification transmitter 30 By other devices in the vehicle emitted by the antennas 21, 22, 23 or the mobile identification transmitter 30 signals can be disturbed. It may be both equally shaped interferers, such as mobile devices or radios, which permanently superimpose the signals of the antennas 21, 22, 23, or so-called peak interferers act, eg ignition pulses which the signals of the antennas 21, 22, 23 briefly overlap.
  • the measured reception field strength depends on a wide variety of other factors. This can be, for example, shading effects, which can be caused for example by the vehicle body or the body of the user.
  • classic car keys as already described above, are becoming more and more popular with smartphones or other portable ones electronic devices or mobile identification transmitter replaced, which can take over the key function.
  • the communi cation between mobile identification transmitter and vehicle often takes place via Bluetooth or WiFi.
  • FIG. 3 schematically shows a system for determining the position of a mobile identification transmitter according to an embodiment of the invention.
  • an electromagnetic signal S21, S22, S23 is respectively out sends.
  • the signals transmitted between the antennas 21, 22, 23 and the mobile identification transmitter 30 may be, for example, signals according to a Bluetooth standard, for example the Bluetooth Low Energy (BLE) standard.
  • BLE Bluetooth Low Energy
  • Bluetooth is an internationally standardized data interface. For example, data or files can be exchanged between two devices or music and Bluetooth via Bluetooth Be transmitted. Bluetooth devices transmit at a frequency of 2.4 GHz and allow data transmission with a short range of usually less than 50m.
  • various Bluetooth standards are known, for example, Bluetooth 1.0 and 1. OB 1999, Bluetooth 2.0 + EDR 2004 or Bluetooth 4.0 2009. It is not important in the present invention, according to which standard the vehicle 10 and the mobile identification transmitter 30 communicate with each other cate. However, in order to enable communication, it is usually necessary for two Bluetooth-enabled devices between which a connection is to be established to communicate according to the same standard. However, some of the standards are also compatible with each other.
  • Bluetooth devices usually consume a relatively large amount of power. However, especially in vehicles or the associated mobile identification transmitters (for example, smartphones), the power consumption is usually critical. As a result, so-called Bluetooth Low Energy (BLE) devices are increasingly found in vehicles and external devices. Bluetooth Low Energy is often referred to as Bluetooth Smart. BLE is based on the classic Bluetooth technology, but has a significantly lower power consumption and is usually cheaper. When using BLE devices in a mobile identification transmitter 30, the battery of the mobile identification transmitter 30 (or of the electronic device) is thus subjected to less load than with conventional Bluetooth devices.
  • BLE Bluetooth Low Energy
  • the signals sent between the antennas 21, 22, 23 and the mobile identification transmitter 30 can also be, for example, signals in accordance with the WiFi standard. Any other kind of signals is also possible.
  • FIG. 3 by way of example, three antennas 21, 22, 23 arranged in the vehicle are shown. This is just an example. In principle, a number of n antennas can be used, with n> 2. The larger the number of antennas 2n, the larger, however, is usually the accuracy in determining the position, as will be described below.
  • the mobile identification transmitter 30 has a further antenna 31. About this further antenna 31, the electromagnetic signals S2n can be received. The reception field strengths P3i> 2i, P3i> 22 / P3i> 23 of the individual signals S2n can then be determined in the mobile identification transmitter 30.
  • the mobile identification transmitter 30 detects a larger reception field strength P3i_ > 2 n of a signal S2n the closer it is to the corresponding antenna 2n.
  • the value of the reception field strength determined is P3i_> 2 n thus depends on the distance between the respective antenna 2n and tumblesgeber the mobile Iden 30 inaccuracies in the measurement, which are caused for example by the type of the electronic apparatus used as the mobile ID Case ⁇ onsgeber 30, contact while measuring each of the reception field strengthen P32_> 2 n on.
  • the measured values of at least two of the reception field strengths P3i_> 2 n ⁇ he inventively in a ratio to each other.
  • Unsi ⁇ uncertainties which occur in all the measurements equally, characterized occur both in the numerator and the denominator and be compensated.
  • two antennas 21, 22 are arranged in the vehicle.
  • an antenna 21 can be arranged in the interior of the vehicle and a second antenna 22 can be arranged outside the vehicle, for example on the vehicle roof .
  • a mobile identification transmitter 30 or a portable electronic device
  • the mobile identification transmitter can receive signals from both antennas 21, 22 on the vehicle and the corresponding reception field strengths P3i > 2i, P3i> 22 to measure these signals.
  • reception field strengths P3i > 2i, P3i> 22 are then set in relation to one another and this ratio is compared with a threshold, for example:
  • the reception field strength P3i_ > 2i measured in relation to the first antenna 21 in the vehicle is substantially greater than that in relation to the second one Antenna 22 Reception field strength P3i- > 22 measured outside the vehicle, assuming that the signals are transmitted with the same strength.
  • the signals emitted by the second antenna 22 are attenuated in example by the vehicle roof, while the signals of the first antenna 21 almost unattenuated in the mobile Identification transmitter 30 arrive. That is, for the ratio of the two values shown above results in this case, a relatively large value (eg> 1).
  • the reception field strength P3i_> 22 measured in relation to the second antenna 22 outside the vehicle would be significantly greater than the reception field strength measured in the vehicle relative to the first antenna 21 P3i-> 2i ⁇ the signals from the first antenna 21 would be weakened in this case from the car body, while the signals of the second antenna 22 is substantially unimpaired would be in the mobile identification transmitter 30th
  • the ratio of the two values shown above would result in a relatively small value (eg ⁇ 1).
  • the first antenna 21 may be attached to the driver's door (eg, left side) while the second antenna 22 is mounted on the passenger's door (eg, right-hand side) on the opposite side of the vehicle.
  • a ratio of the reception field strengths P3i_ would result> 2i / P3i-> 22 close to 1 if it is assumed that the signals are emitted at each of the same thickness.
  • the calculated ratio would thus yield ever greater values. For example, it could be determined that the mobile identification transmitter 30 is detected in a zone B (see FIG. 2) in front of the driver's door, if it is valid
  • Another possibility is, for example, to attach an antenna to the hood and a further antenna in the region of the trunk and to bring the measured reception field strengths in turn to a relationship and to compare with a suitable threshold.
  • the measured with respect to an antenna receive field strength can be set only with a further reception field strength in a ratio, or with several different reception field strengths.
  • a first antenna 21 may be arranged in the interior of the vehicle, a second antenna 22 on the driver's door and a third antenna 23 on the passenger's door.
  • the mobile identification transmitter 30 could, for example, be recognized in one of the zones if: R 3 i- > 2 ⁇ / R3 ⁇ - > 22 > threshold_l, AND
  • various antennas can be arranged in particularly high-contrast positions in the vehicle.
  • different antennas are not arranged in close proximity to each other.
  • the distance between two antennas may be more than 10cm, more than 50cm, more than 1m, or more than 2m.
  • two antennas can also be arranged in close proximity to one another if one antenna is located in the interior of the vehicle, while the other antenna is arranged on the outside of the vehicle.
  • Examples of high-contrast positions are e.g. Interior / exterior, right / left, front ne / rear, diagonally opposite corners, etc.
  • a mobile Identifika tion is recognized as located in a zone when the ratios formed are each greater than a predetermined threshold. This is just an example. It is also possible, for example, to specify lower threshold values which must be exceeded correspondingly by one or more of the ratios:
  • two different threshold values can also be defined for one or more of the ratios formed. These may be a lower threshold Xnmin and an upper threshold Xnmax. It can then be determined whether the respectively determined ratio of the reception field strengths is greater or less than the respective thresholds.
  • different zones can be defined, for example by means of intersection formation. For example, a mobile identification transmitter 30 may be detected as being in a first zone A, if:
  • a mobile identification transmitter 30 may be detected as being in a second zone B if:
  • Different zones may be determined by any such combination of thresholds.
  • the values of the threshold values can be selected according to the desired size and shape of the zones.
  • the response signal S31 is also an electromagnetic signal.
  • the signal S31 thereby contains information on the measured reception field strengths P3i_> 2 n ⁇ It can be emitted a single signal which has information about all ge ⁇ measured reception field strengths P3i_> 2 n.
  • it may S2n are sent out to each of the received signals which are respectively received by the antennas ent ⁇ speaking 2n also each have their own response signal S31.
  • Each of these Ant word signals S31 may then comprise information about the reception field strength P3i_ ⁇ > 2 n of the signal of the respective antenna 2n.
  • the antennas 2n are connected to a control unit 40.
  • Response signals S31 received via the antennas 2n can be sent to the control unit 40 for further processing.
  • the controller 40 thus receives the information on the measured reception field strengths P3i-> 2 n, the entspre ⁇ sponding ratios can form and may determine therefrom the position of the mobile identification transmitter 30, and determine in which zone the mobile identification transmitter is thirtieth However, it is also possible that a position determination already takes place in the mobile identification transmitter 30 and the mobile identification transmitter 30 in the response signal S31 sends an information about the particular position or the specific zone.
  • the antennas are 2n in the vehicle 10 as the transmitting antennas and the antenna 31 in the mobile identifica tion ⁇ encoder 30 serves as a receiving antenna.
  • the determination of the reception field strengths P3i_> 2 n is done in the mobile identifica ⁇ tion encoder 30. However, it is alternatively also possible that the determination of the reception field strengths P3i_> 2 n is not in the mobile identification transmitter 30 is performed. Instead of transmitting signals S2n from each of the antennas 2n in the vehicle, the mobile identification transmitter 30 may transmit one or more signals S31 received from the antennas 2n. In such a case, the antenna 31 is thus used in the mobile Iden ⁇ t Schemesgeber 30 as a transmitting antenna and the antennas 2n in the vehicle 10 serve as receiving antennas.
  • the reception field strength can then P3i_> 2 n each of the received signals are determined S31 and the reception field strengths P3i_> 2 n corresponding to each other and compared with appropriate thresholds in ⁇ speaking conditions. As a result, in turn, the position of the mobile identification transmitter 30 with respect to the vehicle 10 can be determined.
  • the position and shape of the zones A, B, C, D is known. Based on the determined reception field strengths P3i-> 2 n, or the relationships formed, can thus be determined, in which zone A, B, C, D the mobile identification transmitter is thirtieth Depending on the zone in which the mobile identification transmitter 30 is located, a corresponding function in the vehicle can then be allowed or prevented.
  • the system can be libriert example, during operation nachka ⁇ .
  • the specific attenuation can be used, for example, for diagnostic purposes, in particular for self-calibration of the system, for example in order to estimate and adapt the value of the (relative) threshold (s) with which the determined ratios are compared. If, for example, the (relative) threshold (s) at delivery of a vehicle have preset values, these can, if necessary, be recalibrated at a later time in order to adapt the system to possible changes.
  • FIG. 5 shows in a flowchart a method for determining the position of a transponder unit with respect to a vehicle.
  • the transponder unit has a first antenna and the vehicle has at least two antennas.
  • One method includes determining the receive field strengths of signals transmitted between the first antenna and the at least two antennas disposed in the vehicle, respectively (step 501). At least two of the determined receive field strengths are set in relation to each other (step 502). Each of the at least one formed ratio is compared to at least one threshold (step 503). The position of the transponder unit is determined based on the comparison of the ratios with the at least one threshold (step 504).
  • LIST OF REFERENCE NUMBERS LIST OF REFERENCE NUMBERS

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

L'invention concerne un dispositif destiné à déterminer la position d'un générateur mobile d'identification (30) se rapportant à un véhicule (10) qui comporte une première antenne (31) agencée dans le générateur mobile d'identification (30) et au moins deux antennes (2n) agencées dans le véhicule (10). Le dispositif sert à déterminer les forces de champ de réception (P31->2n) de signaux (S2n, S31) émis entre la première antenne (31) et les au moins deux antennes (2n) agencées respectivement dans le véhicule (10), à établir au moins un rapport à partir de deux forces de champ de réception (P31->2n) mesurées différentes et à comparer le rapport ou chacun des rapports à au moins un seuil. La position du générateur mobile d'identification (30) est déterminée à l'aide de la comparaison du ou des rapports au ou aux seuils.
PCT/EP2018/082309 2017-11-28 2018-11-23 Procédé et dispositif de détermination de position de générateurs mobiles d'identification WO2019105850A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880072837.3A CN111344752A (zh) 2017-11-28 2018-11-23 用于确定移动标识发射器的位置的方法和装置

Applications Claiming Priority (2)

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DE102017221285.3A DE102017221285A1 (de) 2017-11-28 2017-11-28 Verfahren und Vorrichtung zur Positionsbestimmung von mobilen Identifikationsgebern
DE102017221285.3 2017-11-28

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FR3103903B1 (fr) * 2019-11-29 2022-07-29 Orange Procédé de localisation d’un utilisateur d’un terminal, procédé de détermination d’une table de localisation, dispositifs, point d’accès, terminal d’un utilisateur, système et programmes d’ordinateur associés.
CN112959972A (zh) * 2021-03-23 2021-06-15 一汽奔腾轿车有限公司 一种智能钥匙在手机干扰情况下的定位判断系统及方法

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