FR2884322A1 - Motor vehicle wheel position locating method, involves controlling transmission of identification request signal consisting of signal modulated by binary data that form coded message dedicated to message identifiable by boxes in wheels - Google Patents

Motor vehicle wheel position locating method, involves controlling transmission of identification request signal consisting of signal modulated by binary data that form coded message dedicated to message identifiable by boxes in wheels Download PDF

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Publication number
FR2884322A1
FR2884322A1 FR0508312A FR0508312A FR2884322A1 FR 2884322 A1 FR2884322 A1 FR 2884322A1 FR 0508312 A FR0508312 A FR 0508312A FR 0508312 A FR0508312 A FR 0508312A FR 2884322 A1 FR2884322 A1 FR 2884322A1
Authority
FR
France
Prior art keywords
vehicle
wheels
wheel
boxes
central unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR0508312A
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French (fr)
Inventor
Olivier Costes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive France SAS
Original Assignee
Continental Automotive France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive France SAS filed Critical Continental Automotive France SAS
Priority to FR0508312A priority Critical patent/FR2884322A1/en
Publication of FR2884322A1 publication Critical patent/FR2884322A1/en
Application status is Pending legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps, of tanks; Tyre cooling arrangements
    • B60C23/02Signalling devices actuated by tyre pressure
    • B60C23/04Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0415Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
    • B60C23/0416Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right

Abstract

The method involves controlling a central processing unit (15) mounted on a motor vehicle (1) and electronic boxes (6-9) equipped in the wheels (2-5) of the vehicle. The unit controls the transmission, through transmitting antennae disposed near the respective wheels, of an electromagnetic identification request signal with the reception of which the boxes transmit a signal comprising an identification code of the wheel. The request signal consists of an electromagnetic signal modulated by binary data forming a specific coded message dedicated to the boxes and identifiable only by the boxes. The central processing unit is integrated with a radiofrequency receiver receiving signals transmitted by the electronic boxes. An independent claim is also included for a motor vehicle wheels` position locating device comprising transmitting antennae and a central processing unit.

Description

2884322 1

  The invention relates to a method and a device for locating the position of wheels of a vehicle equipped with an electronic box adapted to transmit, to a central unit mounted on the vehicle, signals representative of operating parameters of the vehicle. each wheel including, in addition, an identification code of the latter.

  More and more motor vehicles have, for security purposes, surveillance systems mounted on each of the wheels of the vehicle comprising electronic boxes equipped with sensors dedicated to the measurement of parameters, such as pressure or temperature of the tires fitted to these vehicles. wheels, and intended to inform the driver of any abnormal variation in the measured parameter.

  These surveillance systems are conventionally equipped with an electronic box mounted on each of the wheels of the vehicle and comprising a sensor, a microprocessor, a radiofrequency transmitter (or RF transmitter), and a central unit for receiving the signals emitted by the transmitters. , comprising a computer integrating a radio frequency receiver (or RF receiver) connected to an antenna.

  One of the problems that such monitoring systems need to solve lies in the obligation of having to associate with each signal received by the receiver of the central unit, information concerning the location of the housing having sent the signal and therefore of the wheel to the origin of this signal, this obligation lasting for the life of the vehicle, ie to be respected even after wheel changes or simply inversions of the position of these wheels.

  At present, a first location method consists in using three low frequency antennas positioned each close to one of the wheels of the vehicle, and in performing a localization procedure of successively exciting each of these three antennas by the emission a low frequency magnetic field.

  According to this procedure, the casing mounted on the wheel located near the excited antenna commands, in response to and destined for the central unit, the transmission of a continuous carrier low-frequency signal comprising an identification code. , so that the successive excitation of the three antennas leads to the location of the three electronic boxes mounted on the wheels adjacent to these antennas, and by deduction, to the location of the fourth electronic box.

  The main advantage of such a method lies in the fact that the location procedure is very fast and leads to an almost instantaneous location after the vehicle is started.

  By cons, this solution requires to equip the vehicle with three antennas with all subjections related: connection cables, control amplifiers ..., so it is expensive.

  This disadvantage relative to the installation cost of the implementation means of the locating method can be solved when the vehicle is equipped with a hands-free access device intended to allow access to said vehicle and start the latter.

  Indeed, the solution then consists, as described in particular in patent application WO 02/051654, in using the transmitting antennas of this hands-free access device already mounted on the vehicle, in order to implement the procedure for locating the wheels.

  As described in the above-mentioned patent application, the implementation of this solution consists, for example, in controlling the transmission by the transmitting antennas of an uncoded signal when the said antennas are used for the purpose of locating the wheels. , and controlling the transmission of a coded signal when using the antennas to their original purpose of controlling access to the vehicle.

  Such a very attractive solution in theory proves on the other hand very difficult to implement in practice. Indeed, the antennas of the hands-free access devices are not positioned ideally to allow the location of the wheels of a vehicle.

  Therefore, and firstly, the selective nature of this location can be obtained only with very precise settings of the transmit power of the antennas, and generally requires increasing the sensitivity of the receivers mounted on the wheels, with as a consequence, a sensitivity of these receivers to external disturbances.

  In practice, these extreme tuning conditions frequently lead to problems of noise immunity and sensitivity tolerance of the receivers, which results in a very relative reliability of the location method.

  The present invention aims to overcome this drawback related to the unreliability of the locating method described above, and its main purpose is to provide a very efficient locating method in terms of responsiveness and reliability.

  Another object of the invention is to provide a localization method, further requiring, for its implementation, a simple software adaptation of conventional hands-free access devices fitted to current vehicles.

  For this purpose, the invention aims, in the first place, a method of locating the position of wheels of a vehicle equipped with an electronic box adapted to transmit, to a central unit mounted on the vehicle, signals representative of operating parameters of each wheel further comprising an identification code thereof, said locating method consisting of: É to equip the vehicle with transmitting antennas each arranged so as to be positioned close to a wheel or a pair of wheels, É and to control (program) the central unit and the electronic boxes so as to implement a location procedure according to which, successively for each of the transmitting antennas, the central unit controls the transmission, by said transmitting antenna, of an electromagnetic identification request signal to which the electronic unit of each wheel is positioned e near this transmitting antenna is adapted to emit in response a signal comprising the identification code of this wheel.

  According to the invention, this localization method is characterized in that the identification request signal sent by each antenna consists of an electromagnetic signal modulated by binary data forming a specific coded message dedicated to the electronic boxes and identifiable only by the latter. .

  It should be noted that according to the invention, the term "electromagnetic signal" is intended to encompass generally low frequency signals LF and RF radio frequency signals.

  According to the invention, the selective nature of the location procedure results from the fact that the identification request signals transmitted by the antennas consist of coded signals specifically addressed to the electronic boxes, so that: no other source of electromagnetic emission The electro-magnetic reception module, such as for example an electronic badge of a hands-free access device, can not be affected by the transmission of these signals. Indeed these other receiving modules (badge) has their own code distinct from that used by the tire pressure monitoring system.

  Therefore, such a locating method makes it possible to work at high sensitivity levels of the receivers mounted on the wheels while guaranteeing insensitivity with respect to the external electromagnetic disturbances, these data being translated advantageously, in practice, by obtaining a very efficient localization method in terms of responsiveness and reliability.

  In addition, one of the consequences arising from the specific features of the method according to the invention lies in the possibility of advantageously using the antennas of a hands-free access device adapted to allow access to a vehicle and to start it, by means of a simple software adaptation of this hands-free access device consisting in particular in programming the central unit so as to control the transmission by the transmitting antennas: on the one hand a first form of electromagnetic signals modulated by data binary forming a first specific coded message dedicated to electronic boxes, - and secondly, a second form of electromagnetic signals modulated by binary data forming a second specific coded message dedicated to the hands-free access device.

  Furthermore, advantageously according to the invention, the central unit controls the transmission of identification request signals consisting of Manchester encoded signals.

  The invention extends to a device for locating the position of wheels of a vehicle equipped with an electronic box adapted to transmit, to a central unit mounted on the vehicle, signals representative of operating parameters of the vehicle. each wheel including, in addition, an identification code of the latter. According to the invention, this locating device comprises: E transmitting antennas each arranged to be positioned near a wheel or a pair of wheels, É and a central unit implementing a location procedure according to which , successively for each of the transmitting antennas, said central unit controls the transmission of an identification request signal consisting of an electromagnetic signal modulated by binary data forming a specific coded message dedicated to the electronic boxes, in receipt of which the box The electronic circuit of each wheel positioned near this transmitting antenna is programmed to transmit in response a signal comprising the identification code of this wheel.

  In addition, according to an advantageous embodiment of the invention, the transmitting antennas consist of antennas of a hands-free access device equipping the vehicle, adapted to allow access to said vehicle and / or to start the latter. .

  Other features and advantages of the invention will become apparent from the detailed description which follows with reference to the accompanying drawings which represent by way of non-limiting example a preferred embodiment. In these drawings: FIG. 1 is a schematic top view of a vehicle equipped with a surveillance system associated with a device according to the invention for locating the four wheels of said vehicle, and FIGS. 2 and 3 are two schematic top views similar to that of Figure 1, illustrating two locating steps implemented by the locating device according to the invention.

  The locating device according to the invention shown by way of example in FIG. 1 is intended for locating the position of wheels of a vehicle.

  This locating device is more specifically intended to be installed on vehicles equipped with a surveillance system such as that shown in Figure 1, equipping a vehicle 1 provided with four wheels conventionally paved with a tire: two front wheels 2 , 3 and two rear wheels 4, 5.

  Such monitoring systems conventionally comprise, firstly, associated with each wheel 2-5, an electronic box 6-9, for example secured to the rim of said wheel so as to be positioned inside the envelope of the tire.

  Each of these electronic boxes 6-9 for example includes sensors dedicated to the measurement of parameters, such as pressure and / or temperature of the tire, connected to a microprocessor having an identification code of said housing, and connected to an RF transmitter connected to an antenna such as low frequency.

  The monitoring system also comprises a centralized computer or central unit 15 comprising a microprocessor and integrating an RF receiver adapted to receive the signals emitted by each of the four electronic boxes 6-9.

  In the usual way, such a monitoring system and in particular its central unit 15 are designed to inform the driver of any abnormal variation of the parameters measured by the sensors associated with the wheels 2-5.

  The locating device according to the invention also comprises transmitting antennas 11-14 connected to the central unit 15 and each disposed near a pair of left wheels 2, 4, right 3, 5, before 2, 3 or rear 4, 5.

  According to the locating device shown in FIG. 1 and advantageously according to the invention, these transmitting antennas 11-14 consist of antennas of a device usually known as a hands-free access device, adapted to enable to access the vehicle 1 and possibly start the latter through the identification of an electronic badge 16.

  In accordance with the provisions of such a hands-free access device, the antennas 11-14 are respectively positioned: for the left antenna 11 assigned to the pair of left wheels 2, 4: on the handle of the front left door of the vehicle, - for the right aerial 12 assigned to the right wheel pair 3, 5: on the handle of the right front door of the vehicle, - for the front antenna 13 assigned to the front wheel pair 2, 3: to level of the dashboard of the vehicle, - and for the rear antenna 14 assigned to the pair of rear wheels 4, 5: on the handle of the trunk door of the vehicle.

  The electronic badge 16 of this hands-free access system, for its part, conventionally includes a computer integrating a low frequency receiver LF and an RF radio frequency transmitter connected to antennas such as 17.

  In the usual way, such a locating device is adapted to split the locating procedure into three successive stages, one of which makes it possible to identify the pair of rear wheels 4, 5 of the vehicle 1, and the other two to identify, respectively, the one left wheel pair 2, 4, and the other the right wheel pair 3, 5 of said vehicle.

  As represented in FIG. 2, the first step of locating the rear wheels 4, 5 consists in controlling the transmission, by the rear transmitting antenna 14, of a coded identification request signal to which the electronic boxes are received. 8, 9 of said rear wheels transmit in response a signal comprising the respective identification codes of these wheels. Only these electronic boxes 8, 9 respond to the request signal sent because the request signal sent is encoded to be understood only by these devices of the tire pressure monitoring system. In addition the other devices of the tire pressure monitoring system 6.7 are placed too far to receive the sent request signal.

  Each of the two other steps of locating a pair of lateral wheels (for example left wheels 2, 4, as shown in FIG. 3) consists of controlling the transmission by a lateral antenna (left antenna 11 according to FIG. 3). of a coded identification request signal to which the electronic boxes of the two corresponding lateral wheels (electronic boxes 6, 8 of the left wheels 2, 4 according to FIG. 3) transmit in response a signal comprising the identification codes. respective wheels.

  Once these two locating steps have been performed, the central unit 15 thus has all the information for locating all the wheels 2-5 of the vehicle and assigning an identification code to each of said wheels.

  For each of these three steps, moreover, and specifically according to the invention, the coded identification request signals transmitted by the antennas 11, 12, 14 consist of 125 KHz low frequency signals modulated by binary data forming a Manchester type specific coded message dedicated to electronic boxes 6-9 and identifiable only by them. The low frequency signals thus emitted comprise "low frequency" coding data.

  Note that the badge 16 (hands-free access) can not include such a coded message and can not confuse this coded message with a vehicle access message sent by the same antennas. Indeed the badge 16 can only interpret a second form of electromagnetic signals modulated by binary data (forming a second code) specific to the hands-free access device and therefore having a separate code.

Claims (5)

  1 / A method for locating the position of wheels (2-5) of a vehicle (1) equipped with an electronic box (6-9) adapted to transmit, to a central unit (15) mounted on the vehicle (1), signals representative of operating parameters of each wheel further comprising an identification code of the latter, said locating method consisting of: É to equip the vehicle (1) with transmitting antennas (11 -14) each arranged to be positioned in proximity to a wheel (2-5) or a pair of wheels ((2, 4), (3, 5), (2, 3), (4, 5)), É and to control the central unit (15) and the electronic boxes (6-9) so as to implement a location procedure according to which, successively for each of the transmitting antennas (11-14), the central unit (15) controls the transmission, by said transmitting antenna, of an electromagnetic identification request signal to which the housing the electronics (6-9) of each wheel (2-5) positioned near this transmitting antenna is adapted to transmit in response a signal comprising the identification code of this wheel, and the said method of location being characterized in that the identification request signal transmitted by each antenna (11-14) consists of an electromagnetic signal modulated by binary data forming a specific coded message dedicated to the electronic boxes (6-9) and identifiable only by the latter.
  2 / A locating method according to claim 1 characterized in that: E is used during the locating procedure, the antennas (11- 14) of a hands-free access device equipping the vehicle (1), adapted for to allow said vehicle to be accessed and / or to start the latter, and the central unit (15) is programmed so as to control the transmission by the transmitting antennas (11-14), on the one hand, a first form of electromagnetic signals modulated by binary data forming a first specific coded message dedicated to the electronic boxes (6-9) and secondly of a second form of electromagnetic signals modulated by binary data forming a second coded message dedicated to the hands-free access device.
  3 / locating method according to one of claims 1 or 2 characterized in that the central unit (15) controls the transmission of identification request signals consisting of Manchester encoded signals.
  4 / Device for locating the position of wheels (2-5) of a vehicle (1) equipped with an electronic box (6-9) adapted to transmit, to a central unit (15) mounted on the vehicle (1), signals representative of operating parameters of each wheel including, in addition, an identification code of the latter, said location device being characterized in that it comprises in combination: E transmitting antennas ( 11-14) each arranged to be positioned near a wheel (2-5) or a pair of wheels ((2, 4), (3, 5), (2, 3), (4 , 5)), É and a central unit (15) implementing a localization procedure according to which, successively for each of the transmitting antennas (11-14), said central unit controls the transmission of a request signal d identification consisting of an electromagnetic signal modulated by binary data forming a specific coded message dedicated to electronic boxes (6-9), on receipt of which the electronic box (6-9) of each wheel (2-5) positioned near this transmitting antenna is programmed to transmit in response a signal comprising the identification code of this wheel.
  5 / locating device according to claim 4 characterized in that the transmitting antennas (11-14) consist of antennas of a hands-free access device equipping the vehicle (1), adapted to allow access to said vehicle and / or start it.
FR0508312A 2005-08-04 2005-08-04 Motor vehicle wheel position locating method, involves controlling transmission of identification request signal consisting of signal modulated by binary data that form coded message dedicated to message identifiable by boxes in wheels Pending FR2884322A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0508312A FR2884322A1 (en) 2005-08-04 2005-08-04 Motor vehicle wheel position locating method, involves controlling transmission of identification request signal consisting of signal modulated by binary data that form coded message dedicated to message identifiable by boxes in wheels

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FR0508312A FR2884322A1 (en) 2005-08-04 2005-08-04 Motor vehicle wheel position locating method, involves controlling transmission of identification request signal consisting of signal modulated by binary data that form coded message dedicated to message identifiable by boxes in wheels

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011159366A1 (en) 2010-06-15 2011-12-22 Honda Motor Co., Ltd. Tpms and smart entry system
EP2481613A1 (en) * 2011-02-01 2012-08-01 Alps Electric Co., Ltd. Position detecting apparatus
WO2013091823A1 (en) * 2011-12-23 2013-06-27 Continental Automotive France Method for the hands-free access to a motor vehicle and for monitoring the pressure of the tires mounted on said motor vehicle

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US5602524A (en) * 1992-02-26 1997-02-11 Mock; Markus Device for monitoring the air-pressure in pneumatic tires fitted on vehicle wheels
EP1336512A1 (en) * 2002-02-18 2003-08-20 Pacific Industrial Co., Ltd. Tire condition monitoring apparatus
US20030179086A1 (en) * 2002-03-25 2003-09-25 Lear Corporation System for remote tire pressure monitoring with low frequency initiation antenna
WO2003082613A1 (en) * 2002-03-22 2003-10-09 Siemens Vdo Automotive Corporation System and method for identifying source of rf transmission
US20040066288A1 (en) * 2002-09-24 2004-04-08 Ryozo Okumura Tire air pressure monitoring system
DE10226995A1 (en) * 2002-06-18 2004-05-06 Hella Kg Hueck & Co. Radio control system in road vehicle for central door locking and drive-away theft prevention systems has security radio handling driver authentification and additional radio controlling tire pressure
US20050151634A1 (en) * 2004-01-09 2005-07-14 Denso Corporation Tire condition monitoring system

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Publication number Priority date Publication date Assignee Title
US5602524A (en) * 1992-02-26 1997-02-11 Mock; Markus Device for monitoring the air-pressure in pneumatic tires fitted on vehicle wheels
EP1336512A1 (en) * 2002-02-18 2003-08-20 Pacific Industrial Co., Ltd. Tire condition monitoring apparatus
WO2003082613A1 (en) * 2002-03-22 2003-10-09 Siemens Vdo Automotive Corporation System and method for identifying source of rf transmission
US20030179086A1 (en) * 2002-03-25 2003-09-25 Lear Corporation System for remote tire pressure monitoring with low frequency initiation antenna
DE10226995A1 (en) * 2002-06-18 2004-05-06 Hella Kg Hueck & Co. Radio control system in road vehicle for central door locking and drive-away theft prevention systems has security radio handling driver authentification and additional radio controlling tire pressure
US20040066288A1 (en) * 2002-09-24 2004-04-08 Ryozo Okumura Tire air pressure monitoring system
US20050151634A1 (en) * 2004-01-09 2005-07-14 Denso Corporation Tire condition monitoring system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011159366A1 (en) 2010-06-15 2011-12-22 Honda Motor Co., Ltd. Tpms and smart entry system
CN103068599B (en) * 2010-06-15 2016-08-10 本田技研工业株式会社 TPMS and SMART enters system
EP2582532A1 (en) * 2010-06-15 2013-04-24 Honda Motor Co., Ltd. Tpms and smart entry system
CN103068599A (en) * 2010-06-15 2013-04-24 本田技研工业株式会社 Tpms and smart entry system
US9399376B2 (en) 2010-06-15 2016-07-26 Honda Motor Co., Ltd. Recognizing tire sensor location in factory mode for TPMS and smart entry system
RU2558349C9 (en) * 2010-06-15 2015-12-10 Хонда Мотор Ко., Лтд. Tire pressure monitoring system and smart entry system
EP2582532A4 (en) * 2010-06-15 2013-09-11 Honda Motor Co Ltd Tpms and smart entry system
US8686847B2 (en) 2010-06-15 2014-04-01 Honda Motor Co., Ltd. Two axis antenna for TPMS sensor
RU2558349C2 (en) * 2010-06-15 2015-07-27 Хонда Мотор Ко., Лтд. Tire pressure monitoring system and vehicle smart access system
EP2481613A1 (en) * 2011-02-01 2012-08-01 Alps Electric Co., Ltd. Position detecting apparatus
FR2984804A1 (en) * 2011-12-23 2013-06-28 Continental Automotive France Method of hands-free access to a motor vehicle and monitoring the pressure of tires mounted on this vehicle
WO2013091823A1 (en) * 2011-12-23 2013-06-27 Continental Automotive France Method for the hands-free access to a motor vehicle and for monitoring the pressure of the tires mounted on said motor vehicle
US9895942B2 (en) 2011-12-23 2018-02-20 Continental Automotive France Method for the hands-free access to a motor vehicle and for monitoring the pressure of the tires mounted on said motor vehicle

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