FR3090488A1 - Method for assigning an electronic pressure sensor to a position of a wheel of a motor vehicle - Google Patents

Abstract

Method for assigning an electronic pressure sensor to a position of a wheel of a motor vehicle The invention relates to a method for assigning (PR) at least one electronic pressure sensor (20) mounted on a wheel (21) of a motor vehicle at a position (Pos) of said wheel (21) on said motor vehicle comprising a central transmitter / receiver (22), characterized in that it comprises: the transmission (E1) d 'a signal (S) by said electronic pressure sensor (20) and / or by said central transmitter / receiver (22), the reception (E2) of a signal (S') by said central transmitter / receiver (22) and / or by said electronic pressure sensor (20) corresponding to said transmitted signal (S), - the calculation (E3) of at least one parameter (P) relating to said received signal (S '), said parameter being an angle d arrival (AOA) and / or a departure angle (AOD) and / or a flight time (TOF), - as a function of said parameter (P), the allocation (E4) of said electronic pressure sensor (20) to a position (Pos) of said wheel (21) on said motor vehicle. Figure for the abstract: Figure 3

Description

Description

Title of the invention: Method for assigning an electronic pressure sensor to a position of a wheel of a motor vehicle

The present invention relates to a method for assigning at least one electronic pressure sensor mounted on a wheel of a motor vehicle at a position of said wheel on said motor vehicle. It finds a particular, but not limiting, application in motor vehicles.

A method of assigning at least one electronic pressure sensor mounted on a wheel of a motor vehicle to a position of said wheel on said motor vehicle comprises, in a manner known to those skilled in the art:

at. the emission by said electronic pressure sensor of a signal to a central transmitter / receiver of the motor vehicle, the signal comprising angular information of rotation of said wheel,

b. the measurement of the power at reception of the signal received by the central transmitter / receiver, called RSSI measurement ("Received Signal Strenght Indicator"),

vs. as a function of this RSSI measurement and of this angular rotation information, the allocation of said at least one electronic pressure sensor to the position of said wheel on said motor vehicle.

In this context, the present invention aims to present an alternative solution to the state of the prior art mentioned above.

To this end, the invention provides a method for assigning at least one electronic pressure sensor mounted on a wheel of a motor vehicle to a position of said wheel on said motor vehicle, said motor vehicle comprising a central transmitter / receiver, characterized in that said allocation method comprises: a. the emission of a signal by said electronic pressure sensor and / or by said central transmitter / receiver,

b. reception of a signal by said central transmitter / receiver and / or by said electronic pressure sensor, said received signal corresponding to said transmitted signal,

vs. the calculation of at least one parameter relating to said received signal, said at least one parameter being an arrival angle and / or a departure angle and / or a flight time,

d. according to said at least one parameter, the assignment of said electronic pressure sensor to a position of said wheel on said motor vehicle.

[0005] Thus, the RSSI measurement has been replaced by a new parameter which is a calculation of an arrival angle, a departure angle and / or a flight time. With this new parameter, it is possible to determine to which wheel the electronic pressure sensor belongs and thus to know which wheel said electronic pressure sensor gives the pressure.

According to non-limiting embodiments, the attribution method may also include one or more additional characteristics taken alone or in all the technically possible combinations, among the following.

According to a nonlimiting embodiment, the signal transmitted is a radio frequency signal.

According to a nonlimiting embodiment, said central transmitter / receiver comprises at least one pair of planar antennas.

According to a nonlimiting embodiment, said planar antennas are arranged back to back.

According to a nonlimiting embodiment, said calculation of said at least one parameter is carried out:

at. by a central electronic unit of said motor vehicle if said at least one parameter is an angle of arrival or a flight time, or

b. by said at least one electronic pressure sensor if said at least one parameter is a departure angle or a flight time.

According to a non-limiting embodiment, said allocation method further comprises:

at. the emission of a response signal by said electronic pressure sensor or by said central transmitter / receiver,

b. receiving said response signal by said central transmitter / receiver or by said electronic pressure sensor.

According to a nonlimiting embodiment, said at least one parameter is also relative to said response signal when said at least one parameter is a flight time.

According to a nonlimiting embodiment, said allocation method further comprises the sending of angular information of rotation of said wheel by said electronic pressure sensor and the allocation step is also a function of said angular rotation information.

According to a non-limiting embodiment, said motor vehicle comprises a plurality of electronic pressure sensors.

According to a nonlimiting embodiment, said position of said wheel is the right front, the left front, the right rear or the left rear.

The invention and its different applications will be better understood on reading the description which follows and on examining the figures which accompany it.

[Fig.la] shows a diagram of a motor vehicle with a central transmitter / receiver arranged according to a first non-limiting embodiment, and wheels each comprising an electronic pressure sensor, motor vehicle on which is placed implementing a method for assigning at least one electronic pressure sensor to a position of a wheel, according to a nonlimiting embodiment of the invention,

[Fig.lb] shows a diagram of the central transmitter / receiver of Figure la comprising a planar antenna with two dipoles configured to receive a signal corresponding to a signal emitted by at least one electronic pressure sensor,

[Fig.2a] shows a diagram of a motor vehicle with a central transmitter / receiver arranged according to a second non-limiting embodiment, and wheels each comprising an electronic pressure sensor, motor vehicle on which is placed implementing a method for assigning at least one electronic pressure sensor to a position of a wheel, according to a nonlimiting embodiment of the invention,

[Fig.2b] shows a diagram of the central transmitter / receiver of Figure 2a comprising a planar antenna with two dipoles configured to transmit a signal and at least one electronic sensor configured to receive a signal corresponding to said transmitted signal ,

[Fig.3] shows a diagram of a method for assigning at least one electronic pressure sensor to a position of a wheel, according to a first non-limiting embodiment of the invention,

[Fig.4] shows a diagram of a method for assigning at least one electronic pressure sensor to a position of a wheel, according to a first embodiment of a second embodiment not limiting of the invention,

[Fig.5] shows a diagram of a method for assigning at least one electronic pressure sensor to a position of a wheel, according to a second embodiment of a second embodiment not limiting of the invention,

[Fig.6] shows a diagram of a method of assigning at least one electronic pressure sensor to a position of a wheel, according to the second embodiment of Figure 5, said second variant of embodiment comprising an additional step of sending angular rotation information, according to a nonlimiting embodiment.

Identical elements, by structure or by function, appearing in different figures retain, unless otherwise specified, the same references.

A method of assigning PR of at least one electronic pressure sensor 20 (known by the acronym TPMS “Tire Pressure Monitoring System”) mounted on a wheel 21 of a motor vehicle 2 at a position Pos of said wheel 21 on said motor vehicle 2 according to the invention, is described with reference to Figures la to 6, according to non-limiting embodiments. By motor vehicle is meant any type of motor vehicle. In nonlimiting embodiments, the motor vehicle 2 is an electric, hybrid or thermal engine vehicle. The motor vehicle 2 is otherwise called a vehicle.

As illustrated in Figures la and 2a, the motor vehicle 2 comprises: a. four wheels 21 arranged at the front right, the front left, the rear right and the rear left of the motor vehicle 2. A wheel 21 is thus in a position Pos front right, front left, rear right or rear left on the motor vehicle 2,

b. a central transmitter and / or receiver 22, called central transmitter / receiver 22 in the following description, configured to communicate with at least one electronic pressure sensor 20,

vs. said at least one electronic pressure sensor 20 mounted on a wheel 21 of the motor vehicle 2.

In a nonlimiting embodiment, an electronic pressure sensor 20 is mounted on each of the four wheels 21. The motor vehicle 2 thus comprises a plurality of electronic pressure sensors 20. Furthermore, as illustrated in the Figures, in a non-limiting embodiment, central transmitter / receiver 22 is mounted on the dashboard 24 or the central console of the motor vehicle 2. In a non-limiting embodiment illustrated in Figures la and 2a, transmitter / receiver central 22 is mounted near the two front wheels 21. In a first nonlimiting variant illustrated in FIG. 1a, it is mounted closer to a wheel 21 before than the other. In a second non-limiting alternative embodiment illustrated in FIG. 2a, it is mounted at equal distance from the two front wheels 21.

In a nonlimiting embodiment, said at least one electronic pressure sensor 20 comprises an antenna 201. Furthermore, in a nonlimiting embodiment, said central transmitter / receiver 22 comprises one or more planar antennas 220. As illustrated in FIGS. 1b and 2b, a planar antenna 220 comprises at least two dipoles 2200. This makes it possible in particular to distinguish whether a signal S comes from the front or from the rear on the same side of the motor vehicle 2 In a nonlimiting embodiment, said central transmitter / receiver 22 comprises at least one pair of planar antennas 220. In a nonlimiting embodiment, the planar antennas 220 of a pair are arranged back to back, the one facing the right side of the motor vehicle 2, and the other facing the left side of the motor vehicle 2. This makes it possible in particular to better differentiate a signal S emitted by said electronic pressure sensor 20 mounted on the wheel 21 lo rsque the latter is to the right or left of the motor vehicle 2. Of course, it can comprise more than two pairs of planar antennas 220. In the nonlimiting example illustrated in FIGS. 1b and 2b, a single planar antenna 220 is illustrated. Said central transmitter / receiver 22 is configured to communicate with said at least one electronic pressure sensor 20 according to the wireless communication protocol. In a nonlimiting embodiment, the wireless communication protocol is a radio frequency communication protocol. The central transmitter / receiver 22 and said at least one electronic pressure sensor 20 thus exchange radio frequency signals. In nonlimiting embodiments, said central transmitter / receiver 22 is configured to communicate with said at least one electronic pressure sensor 20 according to the WIFI, Bluetooth ™, or 5G communication protocol. In a nonlimiting variant, the communication protocol is Bluetooth Low Energy ™ also known by the term "Bluetooth Smart", otherwise called BLE.

According to a first non-limiting embodiment illustrated in Figures la and 1b, the electronic pressure sensor 20 is configured to transmit a signal S, and said transmitter / receiver 22 is configured to receive a signal S 'corresponding to the signal S emitted by said electronic pressure sensor 20. According to a second nonlimiting embodiment illustrated in FIGS. 2a and 2b, the transmitter / receiver 22 is configured to emit a signal S, and said electronic pressure sensor 20 is configured to receive a signal S 'corresponding to the signal S transmitted by said transmitter / receiver 22.

The PR allocation method is described below according to these two nonlimiting embodiments illustrated respectively in Figures 3 and 4.

According to the first embodiment, the electronic pressure sensor 20 is configured to transmit a signal S and said central transmitter / receiver 22 is configured to receive a signal S ’corresponding to said signal S transmitted. Thus, as illustrated in FIG. 3, the PR allocation method comprises the following steps:

In step E1) illustrated TX (20, S), a signal S is emitted by said electronic pressure sensor 20. In a nonlimiting embodiment, said signal S is a broadcast message according to the protocol of BLE communication.

In step E2), illustrated RX (22, S ’), a signal S’ is received by said central transceiver 22, said received signal S ’corresponding to said signal S transmitted. It will be noted that in a nonlimiting embodiment, the central transmitter / receiver 22 scans its environment to detect the broadcast messages sent by the electronic pressure sensor 20.

In step E3), illustrated CALC (P (AOA), S '), at least one parameter P relating to said received signal S' is calculated, said parameter P being an angle of arrival AOA known by the term Anglo-Saxon from "Angle of Arrivai". In a nonlimiting embodiment, said parameter P calculation is carried out by an electronic central unit 23 of said motor vehicle 2. In a nonlimiting embodiment, the electronic central unit 23 is integrated in the central transmitter / receiver 22 Note that the angle of arrival AOA is more precise than an RSSI measurement.

To calculate an AOA angle of arrival, the planar antenna or antennas 220 of the transmitter / receiver 22 are used. As illustrated in FIG. 1b, in a non-limiting embodiment, the dipoles 2200 d ' a planar antenna 220 are arranged in line at a constant distance d from each other along an axis Ax passing through the base of said dipoles 2200, and each at a perspective distance from the electronic pressure sensor 20. They will each receive a signal S ′ corresponding to the signal S emitted by the electronic pressure sensor 2. The received signals S ′ corresponding to the signal S emitted will have a phase difference Φ proportional to the difference between their respective distances of the transmitter, here the electronic pressure sensor 20. It will be noted that the phase difference Φ is constant if the dipoles 2200 are arranged in line at a distance d constant from one another. Typically, the signal received S 'from a dipole 2200 will be a delayed version of the signal from another dipole 2200. The angle of arrival AOA (referenced 0i in FIG. 1b) is calculated on a dipole 2200 according to the following formula : AOA = arcsin (λΦ) / (2πό) with λ the wavelength of the frequency used in the wireless communication protocol. Since the calculation of the angle of arrival AOA is known to a person skilled in the art, it is not described in more detail here. It will be noted that the same principle also applies if a planar antenna 220 comprises more than two dipoles 2200 and if the transmitter / receiver 22 comprises two planar antennas 220 or more.

In step E4), illustrated MAPP (20, P, Pos (21)), as a function of said at least one parameter P, said electronic pressure sensor 20 is assigned to a position Pos of said wheel 21 on said motor vehicle 2. Thus, when said calculated parameter P is an angle of arrival AOA, it can be determined whether the position Pos of the wheel 21 to which the electronic pressure sensor 20 belongs is the rear or the front and to the right or left. In fact, according to the non-limiting arrangement of the central transmitter / receiver 22, when the electronic pressure sensor 20 is at the right front for example, the signal S which it transmits has an angle of arrival AOA different from the angle of arrival AOA when the electronic pressure sensor 20 is at the front left, or at the rear right or at the rear left. The angle of arrival AOA being thus different according to the place (front right, front left, rear right, rear left) where the electronic pressure sensor 20 is located, one can thus determine to which wheel 21 it belongs.

In a non-limiting embodiment, the electronic pressure sensor 20 can transmit a plurality of signals S at different intervals. Thus, one obtains a plurality of angles of arrival AO A. This makes it possible to confirm the assignment of the electronic pressure sensor 20 to a position Pos of said wheel 21. Thus, one knows to which wheel 21 the electronic sensor of pressure 20 and we know which wheel 21 it gives the pressure.

According to the second embodiment, said central transmitter / receiver 22 is configured to transmit a signal S and the electronic pressure sensor 20 is configured to receive said signal S. The second nonlimiting embodiment is described according to two variants non-limiting embodiments illustrated in FIGS. 4 and 5 and 6.

Thus, as illustrated in FIG. 4, according to a first non-limiting variant of embodiment, the PR allocation method comprises the following steps:

In step E1), illustrated TX (22, S), a signal S is emitted by said central transmitter / receiver 22 of said motor vehicle 2. In a nonlimiting embodiment, said signal S is a message of broadcast according to the BLE communication protocol.

In step E2), illustrated RX (20, S ’), a signal S’ is received by said electronic pressure sensor 20, said received signal S ’corresponding to said signal S transmitted. It will be noted that in a non-limiting embodiment, the electronic pressure sensor 20 scans its environment to detect broadcast messages sent by the central transmitter / receiver 22.

In step E3), illustrated CALC (P (AOD, S ')), at least one parameter P relating to said received signal S' is calculated, said parameter P being a departure angle AOD known by the term English -axon of "Angle of Departure". In a nonlimiting embodiment, said parameter P calculation is performed by said at least one electronic pressure sensor 20. Each electronic pressure sensor 20 thus calculates a departure angle AOD.

To calculate an AOD departure angle, the planar antenna or antennas 220 of the transmitter / receiver 22 are used. The dipoles 2200 of a planar antenna 220 are configured to transmit composite signals otherwise called pure constant carriers which form the signal S. As illustrated in FIG. 2b, in a nonlimiting embodiment, the dipoles 2200 are arranged in line at a constant distance d from each other along an axis Ax passing through the base of said dipoles 2200. The starting angle AOD referenced 0 ₂ in FIG. 2b relative to the signal S is determined relative to the normal of said axis Ax. Considering that the distance between the transmitter / receiver 22 and the electronic pressure sensor 20 is greater than d, there is a difference of d * sin0 ₂ between the length of the path from a dipole 2200 to the antenna 201 of the electronic pressure sensor 20, and that of another dipole 2200 adjacent to the antenna 201 of the electronic pressure sensor 20. There is therefore a phase difference Φ between the two composite signals received by the antenna 201 of the sensor pressure electronics

20, corresponding respectively to the two composite signals emitted by the dipoles 2200. A measurement of this phase difference Φ is carried out by the electronic pressure sensor 20. Based on this measurement and the distance d, the starting angle AOD between the two composite signals of the two 2200 dipoles is calculated. Since the AOD departure angle calculation is known to a person skilled in the art, it is not described in detail here. It will be noted that the same principle also applies if a planar antenna 220 comprises more than two dipoles 2200 and if the transmitter / receiver 22 comprises two planar antennas 220 or more.

In step E4), illustrated MAPP (20, P, Pos (21)), as a function of said at least one parameter P, said electronic pressure sensor 20 is assigned a position Pos of said wheel 21 on said vehicle automobile 2. Thus, when said calculated parameter P is a starting angle AOD, it can be determined whether the position Pos of the wheel 21 to which the electronic pressure sensor 20 belongs is the rear or the front and to the right or to left. In fact, according to the nonlimiting arrangement of the central transmitter / receiver 22, when the electronic pressure sensor 20 is at the right front for example, the signal S emitted by the transmitter / receiver 22 has a departure angle AOD different from the starting angle AOD when the electronic pressure sensor 20 is at the front left, or at the rear right or at the rear left. The departure angle AOD being thus different according to the place (front right, front left, rear right, rear left) where the electronic pressure sensor 20 is located, it is thus possible to determine to which wheel 21 it belongs. In a nonlimiting embodiment, the allocation step E4 is carried out by the electronic central unit 23. At this time, the electronic pressure sensor 20 transmits the parameter P which it has calculated to said electronic central unit 23 In a nonlimiting embodiment, the electronic central unit 23 is integrated into the central transmitter / receiver 22.

Thus, as illustrated in FIGS. 5 and 6, according to a second non-limiting variant of embodiment, the PR allocation method comprises the following steps:

In step E1), illustrated TX (22, S), a signal S is transmitted by said central transmitter / receiver 22 of said motor vehicle 2 to said electronic pressure sensor 20. In a non-limiting embodiment, said signal S is a broadcast message according to the BLE communication protocol.

In step E2), illustrated RX (20, S ’), a signal S’ is received by said electronic pressure sensor 20, said received signal S ’corresponding to said signal S transmitted. Note that the electronic pressure sensor 20 scans its environment to detect broadcast messages sent by the central transmitter / receiver 22.

In step E3), illustrated CALC (P (TOF), S ', Sr), at least one parameter P relating to said received signal S' is calculated, said parameter P being a TOF flight time known as Anglo-Saxon term of "Time Of Flight". In a nonlimiting embodiment, said parameter P calculation is carried out by an electronic central unit 23 of said motor vehicle 2. In a nonlimiting embodiment, the electronic central unit 23 is integrated in the central transmitter / receiver 22 .

For the TOF flight time, this parameter P also relates to a response signal Sr corresponding to said signal S sent following reception by the electronic pressure sensor 20 of said signal S sent by the transmitter / receiver 22 The calculation of the TOL flight time is a measure of the time between:

at. the transmission of the signal S by transmitter / receiver 22 and the reception by the electronic pressure sensor 20 of the received signal S ’corresponding to the signal S transmitted, and

b. the emission of the response signal Sr by the electronic pressure sensor 20 and the reception of said response signal Sr by transmitter / receiver 22.

Said at least one parameter P calculated is thus relative to said received signal S 'and to said response signal Sr. Consequently, in a nonlimiting embodiment, the allocation method PR further comprises before step E3 ):

at. in step E21, illustrated TX (20, Sr)), the emission of a response signal Sr by said electronic pressure sensor 20,

b. in step E22, illustrated RX (22, Sr)), the reception of said response signal Sr by said central transmitter / receiver 22.

The TOL flight time calculation being known to those skilled in the art, it is not described in more detail. Thus, when said calculated parameter P is a flight time TOP, it can be determined whether the position Pos of the wheel to which the electronic pressure sensor 20 belongs is the rear or the front. In fact, according to the non-limiting arrangement of the central transmitter / receiver 22, when the electronic pressure sensor 20 is at the front, the response signal Sr that it transmits takes more or less time to arrive at the 'transmitter / receiver 22 only if the electronic pressure sensor 20 was at the rear. Thus, in a nonlimiting example, if the central transmitter / receiver 22 is mounted closer to the two front wheels 21, and if the electronic pressure sensor 20 is at the front, the response signal Sr that it transmits will put less time to reach the transmitter / receiver 22 than if the electronic pressure sensor 20 was at the rear. In another nonlimiting example, if the central transmitter / receiver 22 is mounted closer to the two rear wheels 21, and if the electronic pressure sensor 20 is at the front, the response signal Sr that it transmits will put more to arrive at the transmitter / receiver 22 only if the electronic pressure sensor 20 was at the rear.

In step E4), illustrated MAPP (20, P, Pos (21)), as a function of said at least one parameter P, the assignment of said electronic pressure sensor 20 to a position Pos of said wheel 21 on said motor vehicle 2. In a nonlimiting embodiment, the allocation step E4 is carried out by the electronic central unit 23.

With the TOF flight time information, it was determined whether the position Pos of the wheel 21 to which the electronic pressure sensor 20 belongs is at the front right or at the front left, and at the rear right or rear left. This nonlimiting embodiment applies when the transmitter / receiver 22 is mounted at a different distance from two wheels 21 mounted on the same front or rear axle. When the transmitter / receiver 22 is mounted at an equal distance from two wheels 21 mounted on the same axle (front or rear), it is not possible to differentiate the right from the left. One cannot in fact distinguish the right or left side with only the parameter P of flight time TOF, the latter then being of the same value when it is calculated for an electronic pressure sensor 20 located at a position to the right or located at one position to the left.

Also, in a nonlimiting embodiment illustrated in Figure 6, the PR allocation method further comprises sending E23, illustrated TX (20, β) of angular information of rotation β of said wheel 21 by said electronic pressure sensor 20. To this end, in a nonlimiting embodiment, the electronic pressure sensor 20 comprises a position sensor 200 (illustrated in FIG. 2a) for determining the angular rotation information β of said wheel 21. It will be noted that the angular rotation information β is determined when the motor vehicle 2 is in motion, namely when the wheels 21 are turning.

Note that depending on whether a wheel 21 is arranged on the right or on the left on the motor vehicle 2, the angular rotation information β is different. Indeed, for the same frame of reference, the angular information of rotation of a wheel 21 positioned to the right will be the inverse of the angular information of rotation of a wheel 21 positioned to the left on the same axle. One wheel will be viewed as turning clockwise, and the other as turning counterclockwise. In nonlimiting examples, the reference system is the central transmitter / receiver 22 or even the center of the axle on which the two wheels 21 are located.

In this case, the allocation step E4 is also a function of said angular rotation information β. With the TOF flight time information, it is determined whether the position Pos of the wheel 21 to which the electronic pressure sensor 20 belongs is at the front and at the rear. With the angular rotation information β, it is determined whether the position Pos of said wheel 21 is on the right or on the left on the motor vehicle 2. In fact, two wheels 21 are mounted on the same axle and are seen from the same repository as turning the other way around. We can thus differentiate them with their respective angular β rotation information.

Thus, by combining the parameter P of calculated flight time TOF and the angular information of rotation β, it can be deduced if the position Pos of the wheel 21 on which the electronic pressure sensor 20 is mounted is the front right, front left, rear right or rear left on the motor vehicle 2, and this position is thus assigned Pos to said electronic pressure sensor 20.

It will be noted that in order to know whether the angular information of rotation comes from a right wheel or from a left wheel, the allocation step E4 comprises a substep E40 illustrated ΟΟΜΡ (β, β ') on FIG. 6 of comparison between said angular information of rotation β received and an angular information of rotation calibrated β '. In a nonlimiting example, said calibrated angular rotation information β ’is saved in memory of the electronic central unit 23 for each wheel 21. It was determined before placing the motor vehicle 2 on the market.

In a nonlimiting embodiment, the electronic pressure sensor 20 can transmit a plurality of signals S at different intervals, each comprising different angular information of rotation β relating to the movement of the wheel 21. Thus, the sub- comparison step E40 is carried out between a set of angular information of rotation β and a set of angular information of rotation calibrated β '.

In a nonlimiting embodiment, the two nonlimiting variant embodiments of the second embodiment can be combined with one another. It is thus possible to have the calculation of two parameters P for assigning a position Pos of a wheel 21 to said electronic pressure sensor 20, namely the calculation of a departure angle AOD and a flight time TOF.

Of course, the description of the invention is not limited to the application and to the embodiments described above. Thus, in a nonlimiting embodiment, the first nonlimiting embodiment can be combined with the second nonlimiting embodiment, either with one or the other of the two nonlimiting variant embodiments or even with the two nonlimiting variant embodiments. It is thus possible to calculate several parameters P to assign said electronic pressure sensor 20 to a position Pos of the wheel 21, namely: a. an AOA arrival angle and an AOD departure angle, or

b. AOA arrival angle and TOF flight time, or

vs. an AOA arrival angle, an AOD departure angle and a TOF flight time.

Thus, we can have:

at. the emission of a first signal S by transmitter / receiver 22 and the emission of a second signal S by the electronic pressure sensor 20, b. reception of a first signal S 'by the electronic sensor 20 corresponding to said first signal S emitted by T transmitter / receiver 22, and reception by Tender / receiver 22 of a second signal S' corresponding to the second signal S emitted by the electronic sensor 20.

Thus, in another nonlimiting embodiment, for the TOF flight time, this

[0065]

P parameter is also related to a response signal Sr corresponding to a signal S transmitted following the reception by central emitter / central receiver 22 of said signal S transmitted by said electronic pressure sensor 20. The calculation of the flight time TOL is a measure of the time between:

at. the emission of the signal S by the electronic pressure sensor 20 and the reception by the transmitter / receiver 22 of the received signal S ’corresponding to the signal S transmitted, and

b. the emission of the response signal Sr by the transmitter / receiver 22 and the reception of said response signal Sr by the electronic pressure sensor 20.

Said at least one parameter P calculated is thus relative to said received signal S ’and to said response signal Sr. In this case, in a nonlimiting embodiment, the parameter P is calculated by said electronic pressure sensor 20.

Thus, the invention described has in particular the following advantage. It makes it possible to determine to which wheel 21, the electronic pressure sensor 20 belongs, so as to determine which wheel it sends the pressure to, even if the wheel 21 is changed in location on the motor vehicle 2.

Claims (1)

[Claim 1] Method for assigning (PR) at least one electronic pressure sensor (20) mounted on a wheel (21) of a motor vehicle (2) at a position (Pos) of said wheel (21) on said motor vehicle (2), said motor vehicle (2) comprising a central transmitter / receiver (22), characterized in that said allocation method (PR) comprises: at. the emission (El) of a signal (S) by said electronic pressure sensor (20) and / or by said central transmitter / receiver (22), b. reception (E2) of a signal (S ') by said central transmitter / receiver (22) and / or by said electronic pressure sensor (20), said received signal (S') corresponding to said transmitted signal (S), vs. the calculation (E3) of at least one parameter (P) relating to said received signal (S '), said at least one parameter (P) being an angle of arrival (AOA) and / or a angle of departure (AOD) and / or a flight time (TOF), d. as a function of said at least one parameter (P), the allocation (E4) of said electronic pressure sensor (20) to a position (Pos) of said wheel (21) on said motor vehicle (2). [Claim 2] [Claim 3] [Claim 4] [Claim 5] The allocation method (PR) according to claim 1, wherein said central transceiver (22) comprises at least one pair of planar antennas (220). Allocation method (PR) according to the preceding claim, wherein said planar antennas (220) are arranged back to back. The allocation method (PR) according to claim 2 or claim 3, wherein a planar antenna (220) comprises two dipoles (2200). Allocation method (PR) according to any one of the preceding claims, according to which said calculation of said at least one parameter (P) is carried out: at. by an electronic central unit (23) of said motor vehicle (2) if said at least one parameter (P) is an angle of arrival (AOA) or a time of flight (TOF), or b. by said at least one electronic pressure sensor (20) if said at least one parameter (P) is a departure angle (AOD) or a time of flight (TOF). [Claim 6] The allocation method (PR) according to any one of the preceding claims, wherein said allocation method (PR) further comprises: at. the emission (E21) of a response signal (Sr) by said sensor pressure electronics (20) or by said central transmitter / receiver (22), b. - reception (E22) of said response signal (Sr) by said central transmitter / receiver (22) or by said electronic pressure sensor (20). [Claim 7] Allocation method (PR) according to the preceding claim, wherein said at least one parameter (P) is also relative to said response signal (Sr) when said at least one parameter (P) is a flight time (TOF) . [Claim 8] Allocation method (PR) according to any one of the preceding claims, wherein said allocation method (PR) further comprises sending (E23) angular rotation information (β) of said wheel (21 ) by said electronic pressure sensor (20) and the allocation step (E4) also depends on said angular rotation information (β). [Claim 9] The allocation method (PR) according to any one of the preceding claims, wherein said motor vehicle (2) comprises a plurality of electronic pressure sensors (20). [Claim 10] Allocation method (PR) according to any one of the preceding claims, in which said position (Pos) of said wheel (21) is the right front, the left front, the right rear or the left rear. . 1/6