• 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 method for determining the position of a user portable equipment (SD ') around a vehicle (V) by a locating device (10') embedded in said vehicle (V) and communicating with the portable equipment (SD ') by radiofrequency waves, the invention providing each reception by the portable equipment, a signal from the location device, the following steps: • step E3: Measure and store a signal intensity value (RSSI (t)) thus received, • step E4: Measure and memorize an acceleration value (AC (t)) of the portable equipment, • step E5: calculate a ratio (R) between a variation of the intensity value thus measured with respect to an intensity value stored at a previous instant (RSSI (t-1) -RSSI (t)), and a variation of the acceleration value thus measured in relation to an acceleration value stored at said previous instant (AC (t- 1) -AC (t)), step E6: Compare the ratio (R) calculated in this way to at least one predetermined threshold (S1, S2) in order to determine a distance (D) between the portable equipment and the vehicle.
    公开号:FR3049065A1
    申请号:FR1652223
    申请日:2016-03-16
    公开日:2017-09-22
    发明作者:Sylvain Godet；Frederic Merlet
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    The present invention relates to the field of automotive and relates more particularly to a method for determining the position of a user portable equipment in a predetermined area around a vehicle and also relates to a location device and portable equipment associates.
    Nowadays, certain motor vehicles are able to communicate with equipment worn by the users of these vehicles, such as an electronic contact key or a smartphone (or "smart" phone in French).
    The communication between a vehicle V (see FIG. 1) and such user portable SD equipment makes it possible, for example, to detect the presence of the user U in a predetermined detection zone ZD around the vehicle V in order to activate certain functions when the user U approaches or moves away from it. By way of example, these functions can be the locking or unlocking of the passenger compartment of the vehicle V, also called "hands-free access" to the vehicle, or adjustments of equipment such as seats, mirrors, air conditioning, etc. .
    There may be a plurality of predetermined detection zones, a first predetermined zone ZD1, and a second predetermined zone ZD2, greater than the first predetermined zone, defined according to the distance D1, D2 separating the portable equipment SD from the vehicle V.
    The actions performed by the vehicle V differ depending on whether the portable equipment SD is in the first predetermined zone ZD1 or in the second predetermined zone ZD2.
    In order to detect the presence of user portable equipment SD in the detection zone ZD, the vehicle V transmits periodically, via an antenna A, a radio signal comprising a so-called broadcast message. When the user's portable SD equipment receives this signal via its on-board antenna, it measures the power in known manner RSSI ("Received Signal Strength Indication" in English) and communicates this value to the vehicle V in a signal of program. The vehicle then uses this power value in order to estimate the distance D to which the user's portable equipment SD is relative to the vehicle V and thus to determine the presence or absence of the user U in the detection zone ZD. .
    However, it is found that the human body can have a negative impact on the performance of the antenna of the portable equipment SD user according to its position relative to the human body. Indeed, the antenna of the user's portable equipment SD can be randomly and arbitrarily oriented when approaching the vehicle V and the tissues of the human body can absorb some of the radio signals, transmitted or received by the user. portable user equipment SD antenna, and cause a mismatch of the impedance of the antenna, causing a power loss radiated in the direction of the body of the user U can for example reach 25 dB.
    The loss of power caused by the position of the user's portable SD equipment on the body reduces the value of the RSSI, measured by the portable SD user equipment and sent to the vehicle V, so that the distance values D The estimates may be erroneous, thus causing errors in the detection of the presence of the user U in the detection zone ZD, which therefore presents a major drawback.
    There is also a disparity in the measurement performance of the RSSI value according to the types of smartphones used.
    There is a growing diversity of smartphones on the market, which also means a diversity of the electronic circuit for measuring RSSI value.
    More precisely, the value of the gain of the receiving antenna of the smartphone as well as the value of the amplification of said measurement differ from smartphone to smartphone. This has the consequence of generating a significant error on the RSSI measurement made by the smartphone and therefore on the estimated distance D between the smartphone SD and the vehicle V. The distance value D being erroneous, the actions performed by the vehicle V are no longer appropriate for the true distance D between the portable equipment SD and the vehicle V. Thus the vehicle V can control the unlocking while the portable equipment SD is actually too far from the vehicle V for such action.
    This is illustrated in FIG. 2. In FIG. 2, the distance values D estimated according to the RSSI values measured by three different types of smartphones SD1, SD2, SD3 are illustrated.
    It is clear from this graph that for a measured RSSI value "S", for example S = -68 dB, corresponds to three distinct distances estimated DS1, DS2, DS3, separating the smartphone SD vehicle V, according to the type of smartphone SD1 , or SD2, or SD3 having realized the measurement RSSI.
    For the first type of smartphone SD1, the estimated distance DSi is equal to 4 m, for the second type of smartphone SD2, the estimated distance DS2 is equal to 6 m, and for the third type of smartphone SD3, the estimated distance DS3 is equal to 25 m. Conversely, for a given distance threshold, Dx, between the smartphone SD and the vehicle, the variation AdB of the corresponding RSSI measurement can be up to 30 dB.
    This variability in the RSSI measurement, for the same distance between the portable equipment and the vehicle also occurs when the portable user equipment is a free hand access badge, however in smaller amplitude. The aim of the invention is to overcome at least part of these disadvantages by proposing a simple, reliable and effective solution for improving the accuracy of the detection of the presence in the detection zone around a motor vehicle of a portable equipment of user, whatever the position of the portable equipment on the body of the user and whatever the type of portable equipment used. The invention proposes a method for determining the position of a portable user equipment around a vehicle by a locating device embedded in said vehicle and communicating with the portable equipment by radiofrequency waves, said portable equipment being equipped with first signal intensity measurement means received; and second acceleration measuring means, said method being remarkable in that at each reception by the portable equipment, a signal from the locating device, it comprises the following steps: step E3: Measuring and memorize a value of intensity of the signal thus received, • step E4: Measure and memorize an acceleration value of the portable equipment, • step E5: calculate a ratio between a variation of the intensity value thus measured with respect to a stored intensity value at a previous instant, and a variation of the acceleration value thus measured with respect to an acceleration value stored at said previous instant, • step E6: Comparing the thus calculated ratio to at least a predetermined threshold to determine a distance between the portable equipment and the vehicle. The invention therefore makes it possible to precisely determine the distance separating the portable equipment from the vehicle, whatever the type of portable equipment, by calculating the derivative of the RSSI measurement on the acceleration of the portable equipment.
    In a second embodiment of the determination method, said method comprises, before step E5, a step of calculating a distance traveled from the variation of the acceleration value thus measured with respect to an acceleration value. stored at a previous instant, and: • step E5 consists in calculating a ratio between the variation of the intensity value thus measured with respect to the stored intensity value at said previous instant, and the distance traveled, • the Step E6 compares the calculated ratio to a predetermined threshold to determine a distance between the portable equipment and the vehicle.
    Conveniently, the determination method comprises a prior step of determining the distance between the portable equipment and the vehicle for a plurality of portable equipment as a function of the ratio between a variation of the intensity value of the received signal between two consecutive instants. , and a variation of the acceleration value of the portable equipment between said two consecutive instants.
    According to the second embodiment, the determination method comprises a preliminary step of determining the distance between the portable equipment and the vehicle for a plurality of portable equipment according to the ratio between a variation of the signal intensity value. received between two consecutive instants, and the distance traveled by the portable equipment between said two consecutive instants.
    The determination method according to the invention may also comprise: during step E3, after the measurement of the intensity value measured by the portable equipment, a step of sending the intensity value to the device for locating, so that said locating device stores said intensity value, • during step E4, after measuring the acceleration value measured by the portable equipment, a step of sending the acceleration value at the location device, so that said location device stores said acceleration value. The invention also relates to a device for locating a portable user equipment around a vehicle, said device being embedded in the vehicle, and communicating with the portable equipment by radiofrequency waves, said device comprising means for receiving an intensity value of a signal sent by the portable equipment, said device being remarkable in that it further comprises: means for receiving an acceleration value sent by the portable equipment, Means for memorizing the intensity values and the acceleration values thus received, a clock, means for calculating a ratio between a variation of the intensity value thus measured with respect to a value of intensity memorized at a previous instant, and a variation of the acceleration value thus measured with respect to an acceleration value stored at said previous instant, • means for comparing the ratio thus calculated and at least a predetermined threshold to determine a distance between the portable equipment and the vehicle.
    In a second embodiment, the locating device further comprises means for calculating a distance traveled between two consecutive instants by the portable equipment from the acceleration value measurements received and: the calculation means consist of means for calculating a ratio between a variation of the intensity value thus measured between said two consecutive instants, and the distance traveled and the means of comparison consist of means of comparison between the ratio thus calculated and at least one predetermined threshold to determine a distance between the portable equipment and the vehicle. The invention also relates to a user portable equipment, communicating by radiofrequency waves with a locating device on board a motor vehicle, intended to be located around the vehicle by said locating device, said portable equipment comprising first measuring means for measuring an intensity value of a received radio frequency signal and second means of an acceleration value of said portable equipment, first means for transmitting said intensity value to the location device, and a clock said portable user equipment being remarkable in that it further comprises: second means for transmitting the thus measured value of acceleration to the location device. The invention applies to any vehicle comprising a locating device according to one of the characteristics listed above and to any system comprising a vehicle equipped with a locating device and a portable equipment according to the characteristics listed above. Other objects, features and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example and on examining the appended drawings in which: FIG. 1, already explained above, represents schematically a system, comprising a vehicle V and a user portable equipment SD according to the prior art, - Figure 2, already explained above, graphically represents the measurement variations RSSI and determination of the distance D between the portable equipment User SD and the vehicle V according to different types of user equipment SD1, SD2, SD3, according to the prior art, - Figure 3 graphically represents the derivative of the RSSI measurement according to the distance D between the equipment. portable and the vehicle, for different types of portable equipment according to the invention, - Figure 4 is a logic diagram showing the method of localization of the portable equipment around the vehicle, according to the invention, - Figure 5 shows schematically the locating device according to the invention, - Figure 6 schematically shows the user portable equipment according to the invention. In Figure 1 is described a system 1 comprising a vehicle V and portable user equipment SD, worn by a user U.
    The vehicle V comprises a locating device 10, in the form of an electronic control unit of the microcontroller type. The locating device 10 is electronically connected to at least one antenna A located on the vehicle V. Generally, the vehicle V comprises three or four antennas A located for example at the doors and connected to the locating device 10.
    The locating device 10 controls, via the antennas A, radiofrequency wave remission to the portable user equipment SD.
    The antennas A emit at regular intervals so-called LF waves, "Low Frequency" in English, or low frequency 125 kFlz. The portable equipment SD, if it is in the reception zone of said waves, sends back to the vehicle V an RF signal comprising the measurement of the intensity of the signal LF that it has received, called measurement RSSI ("Received Signal Strength Indication "in English).
    The locating device 10 then determines from this intensity value RSSI, the distance D separating the portable equipment SD from the vehicle V.
    If the portable equipment SD is in a predetermined zone ZD around the vehicle V, certain functions are then activated by the vehicle V (automatic unlocking of the door, ignition interior lighting ...). In FIG. 1, for purely explanatory purposes, only two predetermined zones ZD1, ZD2 are shown, but there may be more than two predetermined zones around the vehicle V, and each predetermined zone corresponds to an action performed by the vehicle V.
    It is therefore necessary to know precisely the position of the portable equipment SD in said predetermined zones ZD1, ZD2, in order to avoid, for example, the automatic unlocking of the door if the portable equipment SD is in the predetermined zone ZD2. wider around the vehicle V and to allow it only if said equipment is in the predetermined zone ZD1 closest to the vehicle V.
    This locating method is known from the prior art and will not be further detailed here.
    As previously explained, the accuracy of the RSSI measurement, according to the prior art, varies significantly according to the types of portable SD equipment of the user, which impacts the accuracy on the determination of the distance D separating the portable equipment SD. The invention proposes a method for determining the position of the portable equipment SD 'around the vehicle, a portable equipment SD', as well as a locating device 10 'making it possible to determine with precision the distance D separating the portable equipment SD 'from the vehicle V and this, for all types of portable equipment SD'. The portable equipment SD ', according to the invention, is for example of the smartphone type, and is equipped to communicate with the location device 10' by radiofrequency waves, it comprises a radiofrequency antenna (not shown) and an electronic circuit transmission / reception (not shown) connected to the antenna. Said portable equipment SD 'also comprises (see FIG. 6): first measuring means M10 of an intensity value of an RSSI signal, which the portable equipment SD' receives from the vehicle V, first transmission means M30 of said intensity value (RSSI value) measured towards the vehicle V (more precisely to the location device 10 'via the antennas A located on the vehicle V). The portable equipment SD 'also comprises second means M20 for measuring an acceleration value AC of the portable equipment SD', for example an accelerometer, or acceleration measurement sensor, and an internal clock H2. The clock H2 can be a counter or an electronic clock.
    According to the invention, the portable equipment SD 'furthermore comprises (see FIG. 6) second transmission means M40 of the acceleration value C destined for the location device 10'. The transmission means M40 are in the form of software and allow the transmission of said value via the antenna and the transmission / reception circuit of the portable equipment SD '.
    The locating device 10 'embedded in the vehicle V is a control unit of the microcontroller type. Said device 10 'is able to communicate with the portable equipment SD' by radiofrequency waves via the antennas A to which it is connected. Said device SD 'comprises (see FIG. 5) receiving means M1 of RSSI values, or intensity values of the signal received by the portable equipment SD', that the portable equipment SD 'sends to it.
    According to the invention (see FIG. 5), the locating device 10 'furthermore comprises: • reception means M2 of an acceleration value AC sent by the portable equipment SD', • storage means M3 RSSI intensity values and AC acceleration values thus received, • a clock H1, • M4 calculation means of a ratio R between a variation of the intensity value RSSI (t) thus measured with respect to a memorized intensity value RSSI (t-1) at a previous instant, and a variation of the acceleration value AC (t) thus measured with respect to a stored acceleration value AC (t-1) at this instant previous, comparison means M5 between the ratio R thus calculated and at least a predetermined threshold S1, S2 to determine a distance D between the portable equipment SD 'and the vehicle V.
    The reception means M2 are connected to the antennas A and are in the form of an electronic reception circuit and software capable of receiving said acceleration value A by radio frequency waves.
    The storage means M3, the calculation means M4 and the comparison means M5 are in the form of software located in the localization device 10 ', for example a microcontroller. The clock H1 is for example of the clock type, or electronic counter.
    In a second embodiment of the invention, the locating device 10 'calculates, from two acceleration values AC (t), AC (t-1) received at two consecutive instants, (t-1), and (t,) a distance traveled by the portable equipment SD 'between said two instants (t-1), (t) (this is explained below). For this purpose, the locating device 10 'comprises estimation means M6 of the distance traveled d.
    In this second embodiment, the calculation means M4 then calculate a ratio R 'between a variation of the intensity value RSSI (t) thus measured with respect to a stored intensity value RSSI (t-1) at a previous instant, and the distance traveled d between the two consecutive instants (t-1), (t).
    And the comparison means M5 compare ratio R 'thus calculated to at least a predetermined threshold S1', S2 'to determine a distance D between the portable equipment SD' and the vehicle V.
    The method of locating the portable equipment SD 'around the vehicle V is illustrated in FIG. 4 and will now be described.
    In a prior step, (E0) of calibration, the distance D between the portable equipment SD 'and the vehicle V for a plurality of portable equipment is determined according to the ratio R (or R') between a variation of the value of intensity of the RSSI received signal by the portable equipment between two consecutive instants (t-1) and (t), and a variation of the acceleration value AC (t-1) - AC (t) of said portable equipment between said two consecutive instants (or respectively between a variation of the intensity value of the RSSI received signal by the portable equipment between two consecutive instants (t-1) and (t), and the distance traveled between said two instants).
    In other words, the derivative of the value of the intensity of the received signal, the so-called "RSSI" value, is calculated with respect to the acceleration value AC measured at the same times.
    Is :
    With: RSSI (t-1): measurement of the intensity of the signal received at time t-1 (dB), RSSI (t): measurement of the intensity of the signal received at time t (dB), AC (t-1): measurement of acceleration at time t-1 (m2 / s), AC (t): measurement of acceleration at time t (m2 / s).
    In the second embodiment of the invention, the distance traveled between two consecutive acceleration measurements (AC (t-1), AC (t)) is calculated and the derivative of the RSSI measurement is calculated with respect to the distance d traveled between the two instants (t-1) and (t):
    At: elapsed time (s) between time (t-1) and instant (t), d: distance traveled (m) between time (t-1) and time t RSSI (t-1) ): measurement of the intensity of the signal received at time t-1 (dB), RSSI (t): measurement of the intensity of the signal received at time t (dB), AC (t-1): measurement of the acceleration at time t-1 (m2 / s), AC (t): measurement of the acceleration at time t (m2 / s).
    The elapsed time At may correspond to a measurement sampling time of a few milliseconds and may be a fixed value.
    So we have :
    Since At is a fixed duration, that is to say a constant value, we obtain:
    R '= Kx R
    With, K a constant equal to:
    The Applicant has found that the curve representing the derivative of the RSSI value with respect to the distance traveled by the portable equipment (or with respect to the AC acceleration variation) between the same instants, as a function of the distance D separating the portable equipment SD 'from the vehicle V was unique whatever the type of portable equipment SD'.
    This is shown in Figure 3.
    FIG. 3 shows the curves of the derivative of the RSSI value over the distance traveled, that is, the ratio R ', R' = and the derivative of the value RSSI on the variation of acceleration (AC (t-1 ) - AC (t)) as a function of the distance D separating the portable equipment SD 'from the vehicle V for several types of portable user equipment.
    It is clear from FIG. 3 that, at a value of said ratio R '(or at a value of the ratio R), there corresponds a single value of distance D between the various portable equipment SD' and the vehicle V. The previous step EO calibration allows to set thresholds S1 ', S2' (or S1, S2) of the derivative R '(or R) of the intensity value on the distance traveled d (or respectively on the acceleration variation) corresponding at distances D1, D2 around the vehicle V.
    By comparing the value of the ratio R 'with predetermined thresholds, S1', S2 ', it is thus possible to determine the distance D separating the portable equipment SD' from the vehicle V.
    Indeed, the variability observed between several types of portable equipment on the determination of the distance D, as a function of the measured RSSI value comes mainly (only) from antenna amplification gains which are different according to the portable equipment. The ingenious use, according to the invention, of the derivative of the measure RSSI with respect to the distance traveled by the portable equipment SD between the two so-called RSSI measures, makes it possible to cancel the effect of these gains on the determination. distance D.
    After this preliminary step EO for determining the function R = f (D), or R '= f (D), the determination method according to the invention consists, at each reception by the portable equipment SD', of a signal radiofrequency from the location device 10, to: • step E3: Measure and memorize an intensity value RSSI (t) of the signal thus received, • step E4: Measure and memorize an acceleration value AC (t) of the portable equipment, step E5: Calculate the ratio R between a variation of the intensity value RSSI (t) thus measured with respect to a memorized intensity value RSSI (t-1) at a previous instant (step E1) , and a variation of the acceleration value AC (t) thus measured with respect to a memorized acceleration value AC (t-1) at said previous instant (step E2), that is: _ RSSI (t) -RSSI (t -1) _ AC (t) -AC (t-i) • step E6: Compare the R ratio thus calculated to at least one predicted threshold completed S1, S2 to determine a distance D (E7a, E7b) between the portable device SD 'and the vehicle V.
    The predetermined thresholds S1, S2 correspond to distances D1, D2 around the vehicle (see FIG. 3) defining the first predetermined zone ZD1 and the second predetermined zone ZD2, established during the prior calibration phase EO.
    At the first threshold S1 is associated a first distance D1, which defines a first predetermined zone ZD1 around the vehicle.
    At the second threshold S2 is associated a second distance D2, larger than the first distance D1, which defines a second predetermined zone ZD2 around the vehicle V greater than the first predetermined zone ZD1.
    If the calculated ratio R is smaller than the second threshold S2, this means that the portable equipment SD 'is in the second predetermined zone ZD2.
    If the calculated ratio R is smaller than the first threshold S1, this means that the portable equipment SD 'is in the first predetermined zone ZD1. FIG. 3 also shows the derivative R 'of the measurement RSSI with respect to the distance traveled d, as well as a first threshold S1', a second threshold S2 '.
    In the example illustrated in FIG. 3, the calculated ratio R 'is greater than the first threshold S1' and smaller than the second threshold S2 '. The portable equipment SD 'is therefore located in the second zone ZD2.
    For example, considering R ', derived from the measure RSSI with respect to the distance traveled d, we have: S1' = -60 dB / m corresponds to D1 = 2m. S2 '= -20 dB / m corresponds to D2 = 5m. In FIG. 4, the determination method is illustrated by considering only one predetermined zone around the vehicle V, for example the second predetermined zone ZD2.
    In the example of the method illustrated in FIG. 4, if the ratio R is smaller than the second threshold S2, this means that the portable equipment SD 'lies in the second predetermined zone ZD2, (step E7a), if the R ratio is greater than the second threshold S2, then the portable equipment SD 'is not in the second predetermined zone ZD2 (step E7b).
    Of course, several predetermined zones can be defined around the vehicle V, each associated with a distance and therefore a threshold.
    In a second embodiment of the invention, the method comprises, before step E5, a step of calculating a distance traveled between the two acceleration measurements AC (t) and AC (t-1) and the step E5 consists in calculating the ratio R 'between a variation of the intensity value thus measured with respect to an intensity value stored at a previous instant (E1), and the distance traveled d between said two moments (t -1), (t). And step E6 consists in comparing the ratio R 'thus calculated with at least one predetermined threshold S2'.
    In a preferred embodiment, at each reception by the portable equipment SD ', of a radiofrequency signal coming from the localization device 10': • during the step E3, the intensity value RSSI (t) measured by the portable equipment SD ', thanks to the first measuring means M10, is sent to the locating device 10', by the first transmission means M30, so that said locating device 10 'stores said intensity value RSSI (t ) through the storage means M3, • during the step E4, the acceleration value AC (t) measured by the portable equipment SD 'thanks to the second measuring means M20 is sent via the intermediary of the second transmission means M40 to the locating device 10 'so that said locating device 10' stores said acceleration value AC (t) via the storage means M3, • then, the Steps E5 and E6 are then performed respectively by the calculation means M4 and the comparison means M5 located in the localization device 10 '.
    The determination method is repeated at a fixed frequency, in order to regularly determine the position of the portable equipment SD 'around the vehicle V.
    Of course, it is also possible for all of the steps E3 to E6 to be performed by the portable equipment SD ', in this case, said portable equipment SD' comprises means for storing the intensity value RSSI (t). , means for storing the acceleration value AC (t), means for calculating the ratio R (or R ') and comparison means M5 between said calculated ratio R and the predetermined threshold value S1, S2 ( or S1 S2 ').
    And to implement the second embodiment, the portable equipment SD 'includes means for calculating the distance traveled d. The invention therefore makes it possible judiciously to determine the distance D separating the portable equipment SD 'from the vehicle V, whatever the type of portable equipment.
    In addition, the determination device according to the invention is inexpensive because it consists only of software means.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Method for determining the position of a user portable equipment (SD ') around a vehicle (V) by a locating device (10') embedded in said vehicle (V) and communicating with the equipment portable radio frequency (SD '), said portable equipment (SD') being equipped with first measurement means (M10) of received signal intensity, and second acceleration measuring means (M20), said method being characterized in that at each reception by the portable equipment (SD '), a signal from the locating device (10'), it comprises the following steps: • step E3: Measure and memorize an intensity value of the signal (RSSI (t)) thus received, • step E4: Measure and memorize an acceleration value (AC (t)) of the portable equipment (SD '), • step E5: calculate a ratio (R) between a variation of the intensity value thus measured with respect to a e intensity value stored at a previous instant (RSSI (tl) -RSSI (t)), and a variation of the acceleration value thus measured with respect to an acceleration value stored at said previous instant (AC (tl) -AC (t)), • step E6: Compare the ratio (R) thus calculated to at least one predetermined threshold (S1, S2) in order to determine a distance (D) between the portable equipment and the vehicle.
    [2" id="c-fr-0002]
    2. A method of determining, according to the preceding claim, characterized in that it further comprises, before step E5, a step of calculating a distance traveled (d) from the variation of the acceleration value and measured with respect to an acceleration value stored at a previous instant (AC (tl) -AC (t)), and in that: • step E5 consists in calculating a ratio (R ') between the variation of the intensity value thus measured with respect to the memorized intensity value at said previous instant, and the distance traveled (d), • step E6 consists of comparing the ratio (R ') thus calculated with a predetermined threshold (S1' , S2 ') to determine a distance (D) between the portable equipment and the vehicle.
    [3" id="c-fr-0003]
    3. Determination method according to claim 1, characterized in that it comprises a preliminary step (E0) for determining the distance (D) between the portable equipment (SD ') and the vehicle (V) for a plurality of portable equipment according to the ratio (R) between a variation of the intensity value of the signal received between two consecutive instants (RSSI (tl) -RSSI (t)), and a variation of the acceleration value of the portable equipment between said two consecutive instants (AC (t-1) -AC (t)).
    [4" id="c-fr-0004]
    4. Determination method according to claim 2, characterized in that it comprises a preliminary step (EO) for determining the distance (D) between the portable equipment (SD ') and the vehicle (V) for a plurality of portable equipment according to the ratio (R ') between a variation of the intensity value of the signal received between two consecutive instants (RSSI (tl) -RSSI (t)), and the distance traveled (d) by the portable equipment (SD ') between said two consecutive instants.
    [5" id="c-fr-0005]
    5. Determination method according to any one of the preceding claims, characterized in that it further comprises: during step E3, after the measurement of the intensity value (RSSI (t)) measured by the portable equipment (SD '), a step of sending the intensity value (RSSI (t)), to the localization device (10'), so that said localization device (10 ') stores said intensity value (RSSI (t)), • during step E4, after measuring the acceleration value (AC (t)) measured by the portable equipment (SD '), a step of sending the value of acceleration (AC (t)) to the locating device (10 ') so that said locating device (10') stores said acceleration value (AC (t)).
    [6" id="c-fr-0006]
    6. Device for locating (10 ') a user portable equipment (SD') around a vehicle (V), said device (10 ') being embedded in the vehicle (V), and communicating with the vehicle radio frequency portable equipment (SD '), said device (10') comprising means for receiving (M1) an intensity value of a signal sent by the portable equipment (SD '), said device ( 10 ') being characterized in that it further comprises: • receiving means (M2) with an acceleration value (AC (t)) sent by the portable equipment (SD'), • means of storing (M3) intensity values (RSSI (t)) and acceleration values (AC (t)) thus received, • a clock (H1), • calculation means (M4) of a ratio ( R) between a variation of the intensity value thus measured with respect to an intensity value stored at a previous instant (RSSI (tl) -RSSI (t)), and a vari ation of the acceleration value thus measured with respect to an acceleration value stored at said previous instant (AC (tl) -AC (t)); • comparison means (M5) between the ratio (R) thus calculated and at least one predetermined threshold (S 1, S 2) for determining a distance (D) between the portable equipment (SD ') and the vehicle (V).
    [7" id="c-fr-0007]
    7. locating device (10 ') according to the preceding claim, characterized in that it further comprises means for calculating (M6) a distance traveled (d) between two consecutive instants by the portable equipment (SD ') from the acceleration value measurements received (AC (t-1), AC (t)) and in that: • the calculation means (M4) consist of means for calculating a ratio (R ') between a variation of the intensity value thus measured between said two consecutive instants, and the distance traveled (d) and • the comparison means (M5) consist of comparison means between the ratio (R') thus calculated and at least one predetermined threshold (S1 ', S2') for determining a distance (D) between the portable equipment (SD ') and the vehicle (V).
    [8" id="c-fr-0008]
    User portable equipment (SD ') communicating by radiofrequency waves with a locating device (10') embedded in an automobile vehicle (V) intended to be located around the vehicle (V) by said locating device ( 10 '), said portable equipment (SD') comprising first measurement means (M1) of an intensity value of a received radio frequency signal (RSSI (t)) and second means (M2) of a value acceleration (AC (t)) of said portable equipment (SD '), first transmission means (M30) of said intensity value to the location device (10'), and a clock (H2) , said user portable equipment (SD4) being characterized in that it further comprises: second means (M40) for transmitting the acceleration value (AC (t)) thus measured to the device of location (10 ').
    [9" id="c-fr-0009]
    9. Vehicle comprising a locating device (10 ') according to one of claims 6 or 7.
    [10" id="c-fr-0010]
    10. System (1) characterized in that it comprises a vehicle (V) according to claim 9, and a portable equipment (SD ') according to claim 8.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3049065A1|2017-09-22|METHOD FOR DETERMINING THE POSITION OF A PORTABLE USER EQUIPMENT AROUND A VEHICLE AND ASSOCIATED LOCATION DEVICE
    FR3051047A1|2017-11-10|ULTRA HIGH FREQUENCY WAVE LOCATION METHOD OF A PORTABLE "HAND FREE" ACCESS DEVICE TO A VEHICLE, LOCATION DEVICE AND PORTABLE DEVICE THEREOF
    WO2012107188A1|2012-08-16|System for determining the presence of an identifier inside a passenger compartment
    FR3040551A1|2017-03-03|METHOD FOR ULTRA HIGH FREQUENCY LOCALIZATION OF A PORTABLE "HAND FREE" ACCESS DEVICE TO A MOTOR VEHICLE AND ASSOCIATED LOCATION DEVICE
    EP3345015B1|2021-12-15|Method for determining a distance between a vehicle and a vehicle access and starter identifier
    FR2826731A1|2003-01-03|METHOD FOR LOCATING SENSORS MOUNTED EACH ON A VEHICLE WHEEL
    FR3020027A1|2015-10-23|METHOD FOR DETECTING A FIXED POSITION OF A VEHICLE PREDETERMINED REMOTE MEDIATING MEANS
    FR3047085A1|2017-07-28|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
    WO2019155167A1|2019-08-15|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
    WO2018178533A1|2018-10-04|Method for activating a function of a vehicle
    WO2013087197A1|2013-06-20|Method for characterizing a portable device by way of an antenna on board a motor vehicle
    EP3362996B1|2020-02-26|Determining relative position of a car key fob
    WO2017055257A1|2017-04-06|Method for determining characteristics of an electromagnetic wave
    FR2967539A1|2012-05-18|METHOD FOR LOCATING THE WHEELS OF A VEHICLE EQUIPPED WITH A SYSTEM FOR MONITORING THE PRESSURE OF TIRES
    WO2022048817A1|2022-03-10|Method for activating a function of a vehicle via an ultrawide band with an item of portable user equipment, associated system and device for activating a function
    FR3072463A1|2019-04-19|IDENTIFIER FOR MOTOR VEHICLE CENTRAL ELECTRONIC UNIT ASSOCIATED WITH
    WO2020260033A1|2020-12-30|Method for activating a function of a vehicle by ultra high frequency with an item of portable user equipment and device for activating an associated function
    FR3107347A1|2021-08-20|Angle sensor for motor vehicles.
    WO2018154211A1|2018-08-30|Detection of the presence of a human hand on an openable panel of a vehicle
    EP2115885B1|2012-11-07|Signal transmission/reception device
    EP3345165B1|2021-12-15|Method for determining a distance between a vehicle and a vehicle access and starter identifier
    WO2020120491A1|2020-06-18|Method for estimating the distance separating a vehicle and an authentication device
    FR3088793A1|2020-05-22|METHOD AND DEVICE FOR DETECTING A PORTABLE DEVICE FOR "HANDS-FREE" ACCESS TO A MOTOR VEHICLE
    WO2020038891A1|2020-02-27|Method for detecting the approach of an object on a lateral side of a moving vehicle and on-board associated detection device
    FR3056303A1|2018-03-23|METHOD FOR EVALUATING A DISTANCE AND ELECTRONIC MODULE
    同族专利:
    公开号 | 公开日
    DE102017105476A1|2017-09-21|
    US20170272907A1|2017-09-21|
    KR20170107923A|2017-09-26|
    CN107202981A|2017-09-26|
    CN107202981B|2021-01-05|
    US10136256B2|2018-11-20|
    FR3049065B1|2018-03-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2015035501A1|2013-09-11|2015-03-19|Invensense, Inc.|System and method for enhanced integrated navigation with wireless angle of arrival|
    FR3023314A1|2014-07-01|2016-01-08|Johnson Contr Automotive Elect|ACCESS CONTROL SYSTEM FOR A MOTOR VEHICLE|
    US20160055742A1|2014-08-19|2016-02-25|Ruizu Wang|Switch Control System and Method Thereof|WO2020038891A1|2018-08-23|2020-02-27|Continental Automotive France|Method for detecting the approach of an object on a lateral side of a moving vehicle and on-board associated detection device|FI118787B|2005-12-07|2008-03-14|Ekahau Oy|Techniques for determining position|
    US8946938B2|2008-09-27|2015-02-03|Witricity Corporation|Safety systems for wireless energy transfer in vehicle applications|
    US8547253B2|2009-09-04|2013-10-01|GM Global Technology Operations LLC|Method of determining vehicle location from key fob|
    US8315617B2|2009-10-31|2012-11-20|Btpatent Llc|Controlling mobile device functions|
    US8145199B2|2009-10-31|2012-03-27|BT Patent LLC|Controlling mobile device functions|
    IT1398451B1|2010-01-27|2013-02-22|Beghelli Servizi S R L|SYSTEM AND METHOD FOR THE LOCALIZATION OF PERSONS AND / OR OBJECTS WITHIN BUILDINGS.|
    US8515496B2|2011-12-15|2013-08-20|Amazon Technologies, Inc.|Antenna deployment switching for data communication of a user device|
    US9767655B2|2013-10-31|2017-09-19|GM Global Technology Operations LLC|Methods, systems and apparatus for providing notification that a wireless communication device has been left inside a vehicle|
    US9643571B2|2014-05-06|2017-05-09|Nxp B.V.|Field measurement compensation|
    KR102254886B1|2014-06-30|2021-05-24|엘지전자 주식회사|Mobile terminal and method for controlling external device using the same|
    CN109154642A|2016-04-15|2019-01-04|株式会社电装|For establishing the system and method positioned in real time|JP6428655B2|2016-01-14|2018-11-28|株式会社デンソー|Electronic key system, in-vehicle device, and electronic key|
    JP6879113B2|2017-08-04|2021-06-02|トヨタ自動車株式会社|Terminal device, authentication system and authentication control method|
    DE102017221285A1|2017-11-28|2019-05-29|Continental Automotive Gmbh|Method and device for determining the position of mobile identification transmitters|
    法律状态:
    2017-03-22| PLFP| Fee payment|Year of fee payment: 2 |
    2017-09-22| PLSC| Publication of the preliminary search report|Effective date: 20170922 |
    2018-03-23| PLFP| Fee payment|Year of fee payment: 3 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 5 |
    2021-03-23| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1652223|2016-03-16|
    FR1652223A|FR3049065B1|2016-03-16|2016-03-16|METHOD FOR DETERMINING THE POSITION OF A PORTABLE USER EQUIPMENT AROUND A VEHICLE AND ASSOCIATED LOCATION DEVICE|FR1652223A| FR3049065B1|2016-03-16|2016-03-16|METHOD FOR DETERMINING THE POSITION OF A PORTABLE USER EQUIPMENT AROUND A VEHICLE AND ASSOCIATED LOCATION DEVICE|
    CN201710152816.XA| CN107202981B|2016-03-16|2017-03-15|Method for determining the position of a portable user device in the surroundings of a vehicle and associated positioning device|
    US15/459,904| US10136256B2|2016-03-16|2017-03-15|Method for determining the position of a portable user device around a vehicle and associated location device|
    KR1020170032689A| KR20170107923A|2016-03-16|2017-03-15|Method for determining the position of a portable user device around a vehicle and associated location device|
    DE102017105476.6A| DE102017105476A1|2016-03-16|2017-03-15|A method of determining the position of a portable user device in the vicinity of a vehicle and associated location device|
    [返回顶部]