• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a multi-channel ultra-high frequency wave localization method on distinct frequencies of a portable device (P) for accessing and / or starting "hands-free" to a vehicle (V). The localization method measures the intensity (RSSIi, RSSIi + 1, RSSIi + 2) of the signal received on each different frequency channel (CHi, CHi + 1, CHi + 2) and compares the standard deviation (ΔdBT) of this value at a predetermined threshold (S). As long as the standard deviation of the received signal strength is not less than the threshold, the comparison is repeated for each frequency or frequency pair. The localization is performed when the measurement of the standard deviation of the received intensity is lower than the threshold (S) whatever the value of the frequency.
    公开号:FR3047085A1
    申请号:FR1650614
    申请日:2016-01-26
    公开日:2017-07-28
    发明作者:Sylvain Godet；Jerome Lee；Rachid Benbouhout
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    The invention relates to a method for locating ultra-high frequency waves of a portable device for access and / or starting "hands-free" to a motor vehicle and an associated locating device, embedded in the vehicle. The invention is more particularly applicable to access and / or hands-free starting systems for motor vehicles. A so-called "hands free" access system to a motor vehicle allows an authorized user to lock and / or unlock the opening of his vehicle or start the vehicle without using a key. For this, the vehicle proceeds to the identification of a portable device such as a badge or a remote control worn by the user and if the badge or the remote control is located in a predetermined area around the vehicle and is identified as belonging to the vehicle, then the vehicle automatically locks / unlocks its doors or starts according to the intention of the user, without the user having to use a key.
    This system of access "hands free" is known to those skilled in the art. It usually consists of an electronic control unit embedded in the vehicle, one or more Radio Frequency (RF) antenna (s) located on the vehicle and a badge or identification remote control comprising an RF antenna carried by the user.
    An exchange of identifier between the portable device and the vehicle via the RF antennas and the electronic control unit, allows the identification of the portable device by the vehicle and the triggering of the locking or unlocking of the doors or starting by this last. The identifier may be contained in a portable device other than a badge or a remote control, for example it may be contained in a mobile phone, or a watch worn by the user. The exchange of identifier is generally carried out by Radio Frequency (RF) and Low Frequency (LF) waves (or LF "Low Frequency"). The vehicle transmits, via the antennas LF first of all an interrogation signal in LF and the portable device, if it is located in the zone of reception of said signal (ie: a predetermined zone around the vehicle) , refers to the vehicle an RF presence message containing its identifier.
    The precise location of the portable device around the vehicle is achieved by measuring the intensity of the LF signal received by the portable device (via the antennas and the electronic control unit) from the vehicle, more commonly called RSSI measurements (" Received Signal Strength Indication "in English, or measurement of the power in reception of a signal received by an antenna). The measurement of the power of the signal received by the portable device from each antenna LF, is received and analyzed by a localization device on board the vehicle, which thus determines the position of the portable device with respect to said antennas LF, it is ie with respect to the vehicle.
    The locating device D generally comprises the electronic control unit 10 and three to four antennas A1, A2, A3, A4 and is illustrated in FIG. 1. In FIG. 1, three zones are shown for locating the portable device P around of the vehicle V, a first zone Z1 covering the interior of the passenger compartment of the vehicle, a second zone Z2 covering the first zone Z1 and an external zone but close to the vehicle, and a third zone Z3, covering the first and second zone Z1 , Z2 and an enlarged outer zone around the vehicle V.
    Depending on the location of the portable device identified by the vehicle, in said location zones Z1, Z2, Z3, certain actions are automatically performed, starting the vehicle, unlocking / locking or prior lighting of the cabin lighting (also called " welcome lighting ").
    The RSSI measurement makes it possible to precisely locate the portable device P in the location zones, that is to say around and inside the vehicle V to allow not only the locking / unlocking of the doors but also the starting of the vehicle. V, when the portable device P is detected inside the vehicle V.
    In the case where the portable device is a mobile phone, communication with the vehicle in RF (for example in the ISM bands) and LF (for example at 125 kHz) is not possible, since most mobile phones do not have no means of RF and LF communications.
    On the other hand, mobile phones now have the Bluetooth® or Bluetooth Low Energy "BLE" communication standard, that is, communication with Ultra-High Frequency (UHF) from 2400 MHz to 2480 MHz. This communication standard has the advantage of being universal and therefore does not require country-specific certification (only an international Bluetooth Low Energy certification), as is the case with the current RF and LF communication standards of which operating frequency differs by country.
    It is therefore necessary to adapt the "hands-free" access and / or start system to a vehicle so that it can also operate with the Bluetooth® communication standard and no longer only via radio waves and low frequencies (RF, LF). The advantage of the Bluetooth® communication standard is that it allows a wide communication range of around 250m around the vehicle. However, it does not accurately detect the presence of the portable device at shorter distances. For example, when the portable device P is about ten centimeters from the vehicle V and the user wishes to unlock his vehicle, the precise location of the portable device that was possible with the communication device of the prior art, operating on an exchange by RF and LF waves, is no longer possible via Bluetooth®. Indeed, the RSSI measurement of a Bluetooth signal is very imprecise and varies enormously depending on the environment (noise, disturbances) and it is not possible to know if the portable device, whose position is fixed, is to 5m, or 10m or 40m or more from the vehicle.
    It is therefore also not possible to start the vehicle using the Bluetooth® communication, since the start should only be allowed when the portable device is inside the vehicle, and a few centimeters from the UHF antennas of the vehicle . However, given the wide variation of RSSI Bluetooth® detection of said portable device a few centimeters UHF antennas is not possible.
    However, Bluetooth® communication is already an interference-optimized communication protocol, since it is performed sequentially on several channels of different frequencies, also called "multi-channel" communication, generally on three channels, so that to be the least sensitive possible to external disturbances, for example disturbances from a Wifi communication.
    Bluetooth communication consists in the successive transmission of data on three separate frequency channels, for example: 2,402 GHz, then 2,426 GHz, and finally 2,480 GHz. By multiplying the transmission channels, the probability of interference on the three frequencies at the same time being reduced, communication is provided at least on one frequency. The invention proposes a device for ultra-high frequency localization of the portable device to overcome these disadvantages.
    In the present case, the invention proposes a method for locating ultra-high frequency waves from a portable access and / or hands-free starting device to a motor vehicle making it possible to precisely locate the portable device inside. and outside the vehicle, in order to trigger appropriate actions such as, for example, the automatic unlocking / locking of the doors and the starting of the vehicle. The invention proposes a method for locating ultra-high frequency waves of a portable access and / or hands-free starting device for a motor vehicle, the vehicle comprising a locating device comprising at least one communication antenna. ultra-high frequency and an electronic control unit, said locating device communicating with the portable device by ultra-high frequency communication using a plurality of separate frequency channels, the locating method comprising the following steps: Step 100: transmission by the device for locating an interrogation signal for the portable device, • Step 101: reception by the portable device of the interrogation signal, the locating method being characterized in that it further comprises the following steps: Step 102a: Measuring an Intensity of the Signal Received on a Number Pr determined from samples of the interrogation signal and for each frequency • Step 102c; calculating a standard deviation of the intensity of said interrogation signal received at all frequencies, • Step 103: if the standard deviation is less than a predetermined threshold then, • Step 200: determining the location of the portable device, otherwise Step 105: filtering samples of a frequency in the interrogation signal and calculating a new standard deviation of the intensity, Steps 106: if the new standard deviation is below the predetermined threshold then: Step 200: determining the location of the portable device, otherwise • Step 107: repeating steps 105 and 106 for each frequency, • Step 108: once the filtering has been done for all the frequencies then • Step 114: incrementing the number of samples, • Step 115: as long as the number of samples is less than a predetermined value then: - Repetition of the previous steps, otherwise • Step 300: stop the proc hard localization.
    According to a second embodiment of the invention, the method further comprises after step 108: step 110: filtering samples of a pair of frequencies in the interrogation signal and calculating a new standard deviation of the signal, • Step 111: if the new standard deviation is less than the predetermined threshold then, - Step 200: determining the location of the portable device, otherwise - Step 112: repeating steps 109 and 110 for each frequency pair, • Step 113: once the filtering is done for all the pairs of frequencies, then • Step 114: incrementing the number of samples, • Step 115; as long as the number of samples is less than a predetermined value then: - Repetition of the previous steps, otherwise • Step 300: stop the localization procedure.
    In a preferred embodiment of the locating method, said method further comprises between step 102a and step 102c, sending by the portable device to the vehicle the measurement of the intensity of the signal received, at each frequency.
    Conveniently, step 200 includes: • sending by the portable device to the locating device on the at least one frequency, for which the standard deviation of the intensity of the signal received is less than the predetermined threshold, of the value of the intensity of the signal received at the said at least one frequency; • the determination by the localization device of the location of the portable device from the value of the intensity of the signal received.
    Advantageously, step 200 consists in determining a distance between the portable device and the vehicle from the measurement of the intensity of the signal received, on a number of frequency samples, such as the standard deviation of the intensity the signal received at these frequencies is below the predetermined threshold. The invention also relates to a device for locating a portable device for access and / or "hands-free" starting to a motor vehicle, said device comprising at least one ultra-high frequency antenna and an electronic control unit, located in the vehicle, said locating device communicating with the portable device by an ultra-high frequency communication using a plurality of separate frequency channels, said locating device being remarkable in that the electronic control unit comprises: • Means of measurement an intensity of the signal received over a predetermined number of samples of the interrogation signal and for each frequency, • means for calculating a standard deviation of the intensity of said interrogation signal received for at least one frequency, • means of comparison between the standard deviation and a predetermined threshold, • means of filtra at least one frequency of samples in the interrogation signal • means for incrementing the number of samples.
    Preferably, the means for measuring a signal intensity, the means for calculating a standard deviation, the comparison means, the sample filtering means and the incrementation means are in the form of software. The invention also applies to any motor vehicle comprising a locating device according to one of the characteristics listed above. Other characteristics and advantages of the invention will appear on reading the following description and on examining the appended drawings in which: FIG. 1 schematically represents the locating device D fitted to a motor vehicle V, FIG. 2 is a logic diagram illustrating the locating method according to the invention; FIG. 3 schematically represents the locating device D 'according to the invention.
    The locating device D of the prior art is illustrated in FIG. 1. Said locating device D comprises an electronic control unit 10 and at least one ultra-high frequency communication antenna, more specifically by Bluetooth® communication and is embedded in a motor vehicle V. In the example shown in Figure 1, the location device D comprises four communication antennas A1, A2, A3, A4.
    The locating method of the prior art consists, in a first step, in sending by the vehicle V, in Bluetooth®, or in Ultra High Frequency and successively on a plurality of separate frequency channels, generally at three distinct frequencies: at 2.402 GHz, then at 2.426 GHz, and finally at 2.480 GHz, an interrogation signal to a portable device P.
    If the portable device P is within the range of the transmitted signal, the measurement of the intensity of the interrogation signal it receives (measurement RSSI), and that it returns to the vehicle V, then allows the vehicle V to determine its position around said vehicle.
    However, as previously explained, this measurement of the intensity of the received signal (RSSI) in Ultra High Frequency, by the portable device P is not precise enough, and does not allow to locate precisely the portable device P in the localization areas. predetermined, that is to say either in the first zone Z1, in the second zone Z2, or in the third zone Z3. The invention proposes a method of locating a portable device P access and / or startup "hands-free" to a motor vehicle V for the precise determination of the position of said portable device P around the vehicle V while using a ultra high frequency communication on a plurality of frequency channels distinct from each other (of the Bluetooth® or Bluetooth Low Energy type) between the localization device D 'according to the invention and the portable device P.
    For this purpose, the locating method according to the invention consists initially (see step 100 in FIG. 2) in the transmission by the localization device D 'of an interrogation signal intended for a portable device P on a plurality of ultra-high frequency communication channels each having a different frequency, a first frequency CH ,, a second frequency CHi + 1, and + a third frequency CHi + 2, for example: CHi = 2,402 GHz, CHi + 1 = 2,426 GHz, CHi + 2 = 2,480 GHz.
    If the portable device P is within the scope of the interrogation signal (ie in the range of the Bluetooth® communication), said portable device P then receives (step 101), the interrogation signal successively on the three frequency channels. different CH ,, CHi + 1, CHi + 2.
    This is known from the prior art. The invention then proposes in a third step (step 102a) to measure for each frequency CH ,, CHi + 1, CHi + 2 and on a predetermined number of samples X, the intensity of the signal received is the intensity of the signal. received for a predetermined number of samples X at the first frequency RSSIi, .the intensity of the signal received for a predetermined number of samples X at the second frequency RSSIi + 1, and the intensity of the received signal on the predetermined number of X samples at the third frequency RSSIi + 2.
    By "samples" is meant for example X = 10. The Bluetooth® broadcast consists of the broadcasting of events called "advertising" in English on "advertising" channels (for example channel 37, channel 38, and channel 39). In each of the frames sent on these channels are information or data. Once decoded by the receiver (here the portable device), this information or data is processed and the RSSI value determined successively for each channel and each event. The determination of the RSSI value of a Bluetooth® signal is known to those skilled in the art and will not be detailed here.
    In a fourth step (step 102c), according to the invention, a standard deviation AdBT of the value of the received signal intensity thus measured is calculated for all the frequencies combined.
    AdBT = a (RSSIi, RSSIi + 1, RSSIi + 2)
    Then in the next step (step 103), the value of the thus calculated standard deviation AdBT is compared with a predetermined threshold S.
    If the value of the standard deviation AdBT is below the predetermined threshold S, then the location of the portable device P is determined (step 200), by measuring the intensity of the signal RSSI averaged over the whole predetermined number of samples ( either here 3 x X) all frequencies combined.
    If the value of the standard deviation AdBT is greater than the predetermined threshold S, then the value of the standard deviation is recalculated in the following manner (step 105): • the samples corresponding to the filter are filtered in the interrogation signal received; a first frequency, for example, the predetermined number of samples X sent to the first frequency CH ,, is filtered; • the standard deviation AdBT of the received signal intensity is then recalculated only with the samples corresponding to the unfiltered frequencies, c that is to say at the two remaining frequencies, in this example the samples sent to the second and third frequencies CHi + 1, CHi + 2, ie:
    AdBT = a (RSSIi + 1, RSSIi + 2) or else:
    AdBT = σ (RSSIT0T - RSSIt)
    With: RSSItot measurement of the signal intensity of the samples on all frequencies RSSIi: measurement of the signal intensity of the samples sent to the first CH frequency, RSSIi + 1: measurement of the signal intensity of the samples sent to the second frequency CHi + 1 RSSIi + 2: measurement of the signal intensity of the samples sent to the third for the frequency CHi + 2 σ: standard deviation function
    Then, the thus calculated standard deviation AdBT is compared with the predetermined threshold S (step 106).
    As long as the standard deviation AdBT remains greater than the predetermined threshold, then the value of the standard deviation is recalculated by filtering successively in the received signal the samples of each frequency, frequency by frequency.
    First, the samples of the received signal sent to the second frequency CHi + 1 are filtered, and the standard deviation of the signal signal intensity at the two other frequencies is calculated, that is, at the first and third frequencies RSSIi , RSSIi + 2.
    AdBT = a (RSSIT0T - RSSIi + 1) and
    AdBT = o (RSSIirRSSIi + 2)
    Then if the standard deviation AdBT remains greater than the predetermined threshold S, then the samples of the received signal sent to the third frequency CHi + 2 are filtered, and the standard deviation of the signal signal intensity at the other two frequencies is calculated. it is at the first and second frequency RSSIirRSSIi + 1.
    AdBT = a (RSSlT0T - RSSIi + 2) and
    AdBT = o (RSSIirRSSIi + 1)
    Of course, as soon as the value of the standard deviation AdBT is less than the predetermined threshold S, then the location of the portable device P is determined (step 200), by measuring the intensity of the signal RSSI averaged at the frequencies for which the value of the calculated standard deviation AdBT is less than the predetermined threshold S.
    Once the standard deviation has been calculated with each pair of frequencies, i.e. once i> 3, and the value of the standard deviation AdBT remains above the predetermined threshold S then the method of localization proposes in a first embodiment to increase the number of samples, ie (see step 114 in FIG. 2):
    X = k x X
    Then, restarting the locating process of step 102c in step 108 by recalculating the AdBT standard deviation from the new number of samples for each frequency, the method is repeated as long as the number of samples remains below a predetermined value V.
    If the number of samples X is greater than this predetermined value V (step 115), then the process stops (step 300), and the portable device P could not be located around the vehicle V.
    In a second embodiment of the invention, once the standard deviation has been calculated with each pair of frequencies, i.e. once i> 3, (see step 108) and the The value of the standard deviation AdBT remains above the predetermined threshold S, while the locating method proposes to calculate the standard deviation AdBT on the predetermined number of samples X for a single frequency CH, (step 110).
    For example, the standard deviation of the signal strength is first calculated from samples sent at the first frequency
    AdBT = AdBi = o (RSSi)
    Then the standard deviation thus calculated is compared with the predetermined threshold S (step 111).
    As long as the standard deviation AdBT remains greater than the predetermined threshold S, then the value of the standard deviation of the signal intensity is recalculated for each frequency (step 112, 113 and then repeat steps 110 to 113).
    Either the standard deviation of the signal intensity is calculated from the samples sent to the second frequency ΑάΒγ - ΔίΙΒι + ι
    Then if the standard deviation AdBT remains greater than the predetermined threshold S (step 111), then the standard deviation of the signal intensity is calculated from the samples sent to the third frequency: ΑάΒψ - AdBi + 2
    If the value of the thus calculated standard deviation is lower than the predetermined threshold S (step 111) for a given frequency, then the location of the portable device P is determined (step 200) by measuring the intensity of the RSSI signal for said frequency.
    Once the standard deviation has been calculated for each frequency, i.e. once i> 3, and if the value of the standard deviation AdBT remains above the predetermined threshold S, then the locating method proposes to increase the number of samples (see step 114),
    X = k x X
    Then, to redo the localization process of step 102c in step 113 by recalculating the standard deviation with the new number of samples, the method is repeated as long as the number of samples remains below a predetermined value V.
    If the number of samples becomes greater than said predetermined value V, then the process stops (step 300), and the portable device could not be located precisely around the vehicle V.
    In a preferred embodiment of the invention, the locating method comprises between step 102a and 102c, sending by the portable device P to the vehicle V the measurement of the intensity of the signal received at each frequency, either RSSIi, RSSIi + 1, RSSIï + 2 ·
    The following steps from step 102c to step 300 are then performed by the electronic control unit 10 'embedded in the vehicle V and not by the portable device P.
    According to the localization method of the invention, step 200 consists in locating the portable device P from the measurements of the signal intensity (RSSI measurements).
    For this purpose the distance between the portable device P and the vehicle V is determined from the values of the intensity of the received signal RSSIi, RSSIi + 1, RSSIi + 2., Of the frequencies CH ,, CHi + 1, CHi + 2 for which the value of the standard deviation AdBT (of signal intensity) is below the predetermined threshold S.
    It should be noted that the standard deviation function can be replaced at each step by a function calculating the difference between the minimum value and the maximum value of the intensity of the signal received. The locating method then compares this difference value with a predetermined threshold value.
    The value of the predetermined threshold S is set according to the desired location accuracy of the portable device P and is determined during preliminary tests.
    In order to implement the localization method, the invention proposes a device D locating a portable device P for access and / or starting "hands-free" to a vehicle V, the device D comprising at least one antenna A1, A2, A3, ultra-high frequency A4 and an electronic control unit 10 'embedded in the vehicle V. The localization device D communicates with the portable device P by ultra high frequency on a plurality of frequency communication channels CH ,, CHi + 1, CHi + 2 distinct from each other.
    According to the invention, the electronic control unit 10 'comprises: measuring means M1 for each frequency CHj, CHi + 1, CHi + 2, of an intensity of the received signal RSSIir RSSIi + 1, RSSIi + 2 on a predetermined number of samples X of the interrogation signal, • means of calculation M2 of a standard deviation AdBT of the intensity of said interrogation signal received for at least one frequency CH ,, CHi + 1, CHi + 2 , M3 comparison means between the thus calculated standard deviation AdBT and a predetermined threshold S, means for filtering samples M4 of samples of at least one frequency CHi, CHi + 1, CHi + 2 in the interrogation signal, means for incrementing the number of samples M5.
    Advantageously, the measurement means M1, the calculation means M2, the comparison means M3, the sample filtering means M4, the incrementation means M5 are in the form of software. The said means M1, M2, M3, M4, M5 can either be integrated either in the electronic control unit 10 'or in the portable device P in order to carry out the steps 102c to 300. The invention therefore makes it possible to locate precisely a portable device for accessing and / or "hands-free" starting a vehicle with respect to said vehicle via ultra-high frequency waves that was not feasible in the prior art. The invention judiciously proposes to use the plurality of distinct frequency communication channels, not, as in the prior art, to provide the communication, but in order to use here the channel or channels that allow the reception of a signal interrogation whose standard deviation of intensity meets a predefined criterion.
    The locating method according to the invention therefore allows a user to start or access his "hands-free" vehicle using his mobile phone equipped with Bluetooth® communication means.
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    1. Method for locating ultra-high frequency waves of a portable device (P) for accessing and / or starting "hands free" to a motor vehicle (V), the vehicle (V) comprising a location device (D) ') comprising at least one ultra-high frequency communication antenna (A1, A2, A3, A4) and an electronic control unit (10'), said locating device (D ') communicating with the portable device (P) by an ultra-high frequency communication using a plurality of distinct frequency channels (CH ,, CHi + 1, CHi + 2), the localization method comprising the following steps: • Step 100: transmission by the localization device (D ') d an interrogation signal to the portable device (P), • Step 101: reception by the portable device (P) of the interrogation signal, the location method being characterized in that it further comprises the following steps : • Etap e 102a: measuring a received signal intensity (RSSIi, RSSIi + 1, RSSIi + 2) on a predetermined number of samples (X) of the interrogation signal and for each frequency (CHi, CHi + 1, CHi + 2), • Step 102c; calculating a standard deviation (AdBT) of the intensity of said interrogation signal received at all frequencies (ΟΗ ,, CHi + 1, CHi + 2), • Step 103: if the standard deviation (AdBT) is less than a predetermined threshold (S) then, • Step 200: determining the location of the portable device (P), otherwise - Step 105: filtering samples of a frequency (CHi, CHi + 1, CHi + 2) in the signal interrogation and calculation of a new standard deviation (AdBT) of the intensity, - Step 106: if the new standard deviation (AdBT) is lower than the predetermined threshold (S) then Step 200: determination of the location of the portable device (P), otherwise - Step 107: repetition of steps 105 and 106 for each frequency (CHi, CHi + 1, CHi + 2), - Step 108: once the filtering performed for all frequencies (CH ,, CHi + 1 , CHi + 2) then • Step 114: incrementing the number of samples (X), • Step 115: as long as the number of samples (X) is less a predetermined value (V) then: - Repetition of the previous steps, otherwise - Step 300: stop of the locating procedure.
    [2" id="c-fr-0002]
    2. A method of locating, according to the preceding claim, characterized in that it further comprises after step 108: Step 110: filtering samples of a pair of frequencies (CHi, CHi + 1, CHi + 2 ) in the interrogation signal and calculation of a new standard deviation (AdBT) of the signal, - Step 111: if the new standard deviation (AdBT) is lower than the predetermined threshold (S) then, • Step 200: determination of the location of the portable device (P), otherwise - Step 112: repetition of steps 110 and 111 for each frequency pair (CHi, CHi + 1, CHi + 2), - Step 113: once the filtering performed for all pairs of frequencies (CHi, CHi + 1, CHi + 2), then - Step 114: incrementing the number of samples (X), - Step 115; as long as the number of samples (X) is less than a predetermined value (V) then: Repetition of the previous steps, otherwise Step 300: stop the localization procedure.
    [3" id="c-fr-0003]
    3. Location method, according to one of the preceding claims, characterized in that it further comprises between step 102a and 102c step, the sending by the portable device (P) to the vehicle (V) measuring the intensity of the received signal (RSSIi, RSSIi + 1, RSSIi + 2) at each frequency (step 102b).
    [4" id="c-fr-0004]
    4. Location method, according to any one of claims 1 to 3, characterized in that step 200 comprises: • sending by the portable device (P) to the localization device (D ') on the at least one frequency (CH ,, CHi + 1, CHi + 2), for which the standard deviation (AdBT) of the intensity of the signal received is less than the predetermined threshold (S), of the value of the intensity ( RSSIir RSSIi + 1, RSSIi + 2) of the signal received at the at least said frequency (CHi, CHi + 1, CHi + 2), • the determination by the localization device (D ') of the location of the portable device ( P) from the intensity value (RSSIi, RSSIi + 1, RSSIi + 2) of the received signal.
    [5" id="c-fr-0005]
    5. Location method according to any one of the preceding claims, characterized in that step 200 consists in determining a distance between the portable device (P) and the vehicle (V) from the intensity measurement. (RSSIi, RSSIi + 1, RSSIi + 2) of the received signal, on a number of samples (X) of frequencies (CH ,, CHi + 1, CHi + 2), such as the standard deviation (AdBT) of the the intensity of the signal received at these said frequencies is below the predetermined threshold (S).
    [6" id="c-fr-0006]
    6. Device for locating (D ') a portable device (P) for access and / or starting "hands free" to a vehicle (V) automobile, said device (D') comprising at least one antenna ( A1, A2, A3, A4) and an electronic control unit (10 ') located in the vehicle (V), said locating device (D') communicating with the portable device (P) by means of ultra-high communication. high-frequency device using a plurality of distinct frequency channels (CHj, CHi + 1, CHi + 2), said locating device (D ') being characterized in that the electronic control unit (10') comprises: • Means measuring (M1) an intensity (RSSIi, RSSIi + 1, RSSIi + 2) of the received signal on a predetermined number of samples (X) of the interrogation signal and for each frequency (CHi, CHi + 1, CHi +2), • means for calculating (M2) a standard deviation (AdBT) of the intensity of said interrogation signal received for r at least one frequency (CHi, CHi + 1, CHi + 2), • Comparison means (M3) between the standard deviation (AdBT) and a predetermined threshold (S), • Sample filtering means ( M4) of samples at least one frequency (CH ,, CHi + 1, CHi + 2) in the interrogation signal • Incrementing means (M5) of the number of samples (X).
    [7" id="c-fr-0007]
    7. Location device according to the preceding claim, characterized in that the measuring means (M1) of a signal intensity, the calculation means (M2) of a standard deviation, the comparison means (M3), the sample filtering means (M4) and the incrementing means (M5) are in the form of software.
    [8" id="c-fr-0008]
    8. Vehicle (V) automobile, characterized in that it comprises a locating device (D ') according to one of claims 6 to 7.
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    同族专利:
    公开号 | 公开日
    FR3047085B1|2018-04-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20090231958A1|2005-03-29|2009-09-17|Panasonic Corporation|Rssi and ultrasonic based hybrid ranging technology|
    US20140188348A1|2012-12-27|2014-07-03|GM Global Technology Operations LLC|Method and system for detecting proximity of an end device to a vehicle based on signal strength information received over a bluetooth low energy advertising channel|
    DE102014109837A1|2014-07-14|2016-01-14|Hella Kgaa Hueck & Co.|Method and hand-free access system for locating a user identification means and for data communication between the user identification means and a user device|WO2019155167A1|2018-02-09|2019-08-15|Continental Automotive France|Method for detecting a portable user equipment in a predetermined zone, inside or outside a vehicle, by ultra high frequency, associated detection device and user equipment|
    FR3082088A1|2018-06-05|2019-12-06|Valeo Comfort And Driving Assistance|METHOD FOR DETECTING AN IDENTIFIER INSIDE OR OUTSIDE A MOTOR VEHICLE|
    FR3101040A1|2019-09-24|2021-03-26|Valeo Comfort And Driving Assistance|Method of detecting an identifier for the passive start of a vehicle|
    WO2021176006A1|2020-03-05|2021-09-10|Continental Automotive Gmbh|Method for ultra high frequency continuous communication and location of a portable device for "hands-free" access to a motor vehicle|
    法律状态:
    2017-01-20| PLFP| Fee payment|Year of fee payment: 2 |
    2017-07-28| PLSC| Publication of the preliminary search report|Effective date: 20170728 |
    2018-01-19| PLFP| Fee payment|Year of fee payment: 3 |
    2020-01-21| PLFP| Fee payment|Year of fee payment: 5 |
    2021-01-21| PLFP| Fee payment|Year of fee payment: 6 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1650614|2016-01-26|
    FR1650614A|FR3047085B1|2016-01-26|2016-01-26|METHOD FOR ULTRA HIGH FREQUENCY RADIO WAVE LOCATION OF A PORTABLE HANDS-FREE ACCESS AND / OR START DEVICE TO A MOTOR VEHICLE AND ASSOCIATED LOCATION DEVICE|FR1650614A| FR3047085B1|2016-01-26|2016-01-26|METHOD FOR ULTRA HIGH FREQUENCY RADIO WAVE LOCATION OF A PORTABLE HANDS-FREE ACCESS AND / OR START DEVICE TO A MOTOR VEHICLE AND ASSOCIATED LOCATION DEVICE|
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