EP2064076A2 - System for managing onboard sensors, corresponding vehicle part and vehicle - Google Patents

System for managing onboard sensors, corresponding vehicle part and vehicle

Info

Publication number
EP2064076A2
EP2064076A2 EP07823830A EP07823830A EP2064076A2 EP 2064076 A2 EP2064076 A2 EP 2064076A2 EP 07823830 A EP07823830 A EP 07823830A EP 07823830 A EP07823830 A EP 07823830A EP 2064076 A2 EP2064076 A2 EP 2064076A2
Authority
EP
European Patent Office
Prior art keywords
sensor
identifier
frame
speed
vehicle
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.)
Withdrawn
Application number
EP07823830A
Other languages
German (de)
French (fr)
Inventor
Didier Couto
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.)
Renault SAS
Original Assignee
Renault 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 Renault SAS filed Critical Renault SAS
Publication of EP2064076A2 publication Critical patent/EP2064076A2/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices 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 or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling 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
    • B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
    • B60C23/0416—Automatically 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

Definitions

  • Onboard sensor management system corresponding vehicle and vehicle part
  • the present invention relates to sensor management systems embedded on board a vehicle.
  • the invention relates to the identification of sensors mounted on parts of the vehicle, which can be changed, in particular during a maintenance operation, for example a vehicle wheel whose tire can be changed because of wear, the wheel can be reassembled at a different location from its original location.
  • a maintenance operation for example a vehicle wheel whose tire can be changed because of wear
  • the factory identification of sensors provided on the wheels is not sufficient. It is desirable to identify each wheel including after a maintenance operation.
  • the present invention aims to achieve the learning of a part identifier automatically by a device embedded in the vehicle.
  • the present invention aims a self-learning that can be carried out in the various phases of life of the vehicle, especially after assembly factory, after-sales, when changing one or more wheels, with low consumption of energy.
  • the system for managing sensors embedded in a vehicle comprises a management unit and a radio frequency receiver connected to the management unit.
  • the radio frequency receiver is capable of receiving signals from radiofrequency transmitters.
  • the radio frequency transmitters are each connected to a sensor and are capable of transmitting at predetermined intervals a signal comprising a frame containing the identifier of the sensor and data.
  • the first frame is transmitted at a first time interval.
  • the management unit is configured to identify said transmitter upon receipt of the identifier and to determine the position of said transmitter. This provides a powerful management system throughout the life of the vehicle and capable of providing the dashboard information relating to a wheel of the vehicle whose position, front or rear and right or left is determined despite of possible wheel interversions. Transmitters can be powered by long - life batteries because of the spacing of the emission periods.
  • the power of the field received by the receiver is a function of the position of the valve on the wheel.
  • the first interval is between 5 and 64 seconds, for example between 60 and 64 seconds.
  • the duration of the frames is between 0.1 and 1 second.
  • the management unit includes means for comparing a speed provided by a non-rotating speed sensor and a speed provided by a speed rotating sensor, and means for matching an identifier and a wheel position.
  • the identifier may comprise a numerical code, for example 8 or 9 digits.
  • the signal comprises five frames.
  • the invention also relates to a vehicle part comprising at least one sensor and an emitter connected to the sensor and capable of emitting at a predetermined interval a signal containing an identifier of the sensor.
  • the radio frequency transmitter is capable of transmitting at predetermined intervals a signal comprising a first frame containing a first identifier of the sensor and data, the first frame being transmitted at a first time interval.
  • the signal may contain a second frame containing the same identifier or a second identifier, and other data.
  • the piece may include a wheel.
  • the part may comprise a pressure sensor, a rotation sensor and / or a temperature sensor.
  • the invention also relates to a vehicle comprising a chassis and a part integral with the chassis and comprising at least one sensor and an emitter connected to the sensor and capable of emitting at a predetermined interval a signal containing an identifier of the sensor.
  • the radiofrequency transmitter is capable of transmitting at predetermined intervals a signal comprising a first frame containing a first identifier of the sensor, the first frame being transmitted at a first time interval.
  • a second frame may contain a second identifier or the same, and data.
  • a vehicle part for example a wheel or a suspension part
  • a management unit being able to identify the position of the vehicle. piece relative to the chassis of the vehicle.
  • the tire pressure, the wheel rotation speed and the tire temperature can be monitored by appropriate sensors, transmitted to the management unit which can match the monitoring data. and the position of a wheel.
  • FIG. 1 is a schematic view of a vehicle equipped with a an onboard sensor management system
  • Figure 2 shows an example of transmission of the frames.
  • the vehicle 1 comprises a chassis 2, four wheels 3 to 6 connected to the chassis 2, an anti-lock system of wheels 7 comprising a computer 8 and four sensors 9 to 12 respectively dedicated to the measurement of the speed of rotation of the wheels 3 to 6.
  • the sensors 9 to 12 are mounted on the frame 2 or on a non-rotating element connected to the frame 2.
  • the connection between the computer 8 and the sensors 9 to 12 can be provided by son, multiplexed or not.
  • the vehicle 1 further comprises an onboard sensor management system 13 provided for the individual monitoring of the wheels 3 to 6.
  • the management system 13 comprises a computer 14, a radio frequency receiver 15 connected to the computer 14, a radio frequency transmitter 16 may be connected to the computer 14.
  • the receiver 15 and the transmitter 16 may be connected to a common antenna not shown.
  • the computer 14 is connected to the computer 8 of the anti-lock system of wheels 7 to receive the speed measurements made by the speed sensors 9 to 12.
  • Each wheel 3 to 6 comprises an identification module 17 provided with a computer 18, preferably of relatively simple type, for example a microcontroller, a radiofrequency transmitter 19 and a radio frequency receiver or LF 20 connected to the computer.
  • each wheel 3 to 6 comprises a speed sensor 21, a temperature sensor 22 and a pressure sensor 23, all three connected to the computer 18.
  • the speed sensor 21 may be of the centrifuged ball type.
  • the temperature and pressure sensors 22 may be disposed on an outer surface of the rim of the wheel, inside the tire.
  • the computer 18 can order the sensors 21 to 23 of each wheel 3 to 6 to take measurements at specified time intervals or at the request of the management system 13 to reduce the energy consumption of the system 17.
  • the computer 14 of the management system 13 can send by the transmitter 16 a measurement request for the receiver 20 of each wheel 3 to 6.
  • the measurement request is then processed by the computer 18 which controls the measurement by the sensors 21 to 23 and transmits back via the transmitter 19 a signal containing the measurement results intended to be detected by the receiver 15 of the management system 13.
  • the management computer 14 can send a transmission command via the transmitter 16 to each wheel 3 to 6.
  • the computer 18 may, depending on the speed, decide the operation described below.
  • the transmission orders are received by the receiver 20 of each wheel 3 to 6 and transmitted to the computer 18 which then controls a measurement step by the sensors 21 to 23, then, having received the measurement data from the sensors 21 to 23 develops a signal to the management system 13, said signal being emitted by the transmitter 19.
  • Said signal comprises a first frame containing an identifier of the wheel.
  • the first frame may have a duration of the order of 300 ms and be transmitted eight times per second for 15 minutes and then four times per second for 45 minutes, for a total duration of emission of one hour.
  • the signal also comprises one or, preferably, several second frames with a duration of the order of 30 ms also comprising an identifier and data, in particular measurement data of the sensors 21 to 23. For example, five second frames can be sent every two seconds.
  • the computer 14 of the management system 13 receives from each wheel a signal comprising a wheel identifier, a speed, a temperature and a pressure. The computer 14 then makes a comparison between the speed of each wheel received from the anti-lock system 7 and the speed of each wheel associated with each wheel identifier and performs a matching between each identifier and the actual position of the wheel known from the position of the sensors 9 to 12 fixed relative to the chassis 2.
  • the speeds of the four wheels 3 to 6 become different, hence the possibility knowing the speed of the wheel and its position thanks to the signal received by the anti-lock system 7 to associate the identifier and the position of each wheel.
  • the The probability is sufficient that the vehicle has made a significant turn sufficient for the differences in speeds between the wheels to be greater than the resolution of the sensors and the accuracy of the computers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Traffic Control Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

System 13 for managing sensors that are carried on board a vehicle 1, comprising a management unit 14 and a radiofrequency receiver 15 that is linked to the management unit 13, the radiofrequency receiver 15 being capable of receiving signals originating from radiofrequency emitters 20, the radiofrequency emitters 20 each being linked to a sensor 21 and capable of emitting at predetermined intervals a signal comprising a first frame containing a first identifier of the sensor, the first frame being emitted at a first time interval, and a second frame containing a second identifier of the sensor and data, the management unit 13 being configured so as to identify said emitter on reception of the identifier and to determine the position of said emitter.

Description

Système de gestion de capteurs embarqués, pièce de véhicule et véhicule correspondants Onboard sensor management system, corresponding vehicle and vehicle part
La présente invention concerne les systèmes de gestion de capteurs embarqués à bord d'un véhicule.The present invention relates to sensor management systems embedded on board a vehicle.
Plus particulièrement, l' invention concerne l' identification de capteurs montés sur des pièces du véhicule, qui peuvent être changées, notamment au cours d'un opération d' entretien, par exemple une roue de véhicule dont le pneumatique peut être changé pour cause d'usure, la roue pouvant être remontée à un emplacement différent de son emplacement d' origine. L'identification en usine de capteurs prévus sur les roues n' est donc pas suffisante. Il est souhaitable d' identifier chaque roue y compris après une opération d'entretien.More particularly, the invention relates to the identification of sensors mounted on parts of the vehicle, which can be changed, in particular during a maintenance operation, for example a vehicle wheel whose tire can be changed because of wear, the wheel can be reassembled at a different location from its original location. The factory identification of sensors provided on the wheels is not sufficient. It is desirable to identify each wheel including after a maintenance operation.
Différents documents de Johnson Controls Technology sont connus : WO 2004/34352, EP 931 679, EP 1 055 531 , FR 2 831 669, FR 2 833 523 , FR 2 844 748 et FR 2 869 839.Various documents from Johnson Controls Technology are known: WO 2004/34352, EP 931 679, EP 1 055 531, FR 2 831 669, FR 2 833 523, FR 2 844 748 and FR 2 869 839.
La présente invention vise à réaliser l' apprentissage d'un identifiant de pièces de manière automatique par un dispositif embarqué dans le véhicule.The present invention aims to achieve the learning of a part identifier automatically by a device embedded in the vehicle.
La présente invention vise un auto-apprentissage qui peut s' effectuer dans les différentes phases de vie du véhicule, notamment après le montage en usine, en après-vente, lors du changement d'une ou plusieurs roues, avec une faible consommation d' énergie.The present invention aims a self-learning that can be carried out in the various phases of life of the vehicle, especially after assembly factory, after-sales, when changing one or more wheels, with low consumption of energy.
Le système de gestion de capteurs embarqués à bord d'un véhicule comprend une unité de gestion et un récepteur radiofréquence relié à l'unité de gestion. Le récepteur radiofréquence est capable de recevoir des signaux en provenance d' émetteurs radiofréquence. Les émetteurs radiofréquence sont chacun reliés à un capteur et sont capables d' émettre à intervalles prédéterminés un signal comprenant une trame contenant l' identifiant du capteur et des données . La première trame est émise à un premier intervalle temporel. L'unité de gestion est configurée pour identifier ledit émetteur à réception de l' identifiant et pour déterminer la position dudit émetteur. On obtient ainsi un système de gestion performant tout au long de la durée de vie du véhicule et capable de fournir au tableau de bord une information relative à une roue du véhicule dont la position, avant ou arrière et droite ou gauche est déterminée malgré d' éventuelles interversions des roues. Les émetteurs peuvent être alimentés par des piles à longue durée de vue en raison de l' espacement des périodes d' émission.The system for managing sensors embedded in a vehicle comprises a management unit and a radio frequency receiver connected to the management unit. The radio frequency receiver is capable of receiving signals from radiofrequency transmitters. The radio frequency transmitters are each connected to a sensor and are capable of transmitting at predetermined intervals a signal comprising a frame containing the identifier of the sensor and data. The first frame is transmitted at a first time interval. The management unit is configured to identify said transmitter upon receipt of the identifier and to determine the position of said transmitter. This provides a powerful management system throughout the life of the vehicle and capable of providing the dashboard information relating to a wheel of the vehicle whose position, front or rear and right or left is determined despite of possible wheel interversions. Transmitters can be powered by long - life batteries because of the spacing of the emission periods.
Dans un mode de réalisation, la puissance du champ reçu par le récepteur est fonction de la position de la valve sur la roue.In one embodiment, the power of the field received by the receiver is a function of the position of the valve on the wheel.
Dans un mode de réalisation, le premier intervalle est compris entre 5 et 64 secondes, par exemple entre 60 et 64 secondes .In one embodiment, the first interval is between 5 and 64 seconds, for example between 60 and 64 seconds.
Dans un mode de réalisation, la durée des trames est comprise entre 0, 1 et 1 seconde.In one embodiment, the duration of the frames is between 0.1 and 1 second.
Dans un mode de réalisation, l'unité de gestion comprend un moyen pour comparer une vitesse fournie par un capteur non tournant de vitesse et une vitesse fournie par un capteur tournant de vitesse, et un moyen pour apparier un identifiant et une position de roue. L'identifiant peut comprendre un code numérique, par exemple de 8 ou 9 chiffres.In one embodiment, the management unit includes means for comparing a speed provided by a non-rotating speed sensor and a speed provided by a speed rotating sensor, and means for matching an identifier and a wheel position. The identifier may comprise a numerical code, for example 8 or 9 digits.
Dans un mode de réalisation, le signal comprend cinq trames .In one embodiment, the signal comprises five frames.
L'invention concerne également une pièce de véhicule comprenant au moins un capteur et un émetteur relié au capteur et capable d' émettre à intervalles prédéterminés un signal contenant un identifiant du capteur. L' émetteur radiofréquence est capable d' émettre à intervalles prédéterminés un signal comprenant une première trame contenant un premier identifiant du capteur et des données, la première trame étant émise à un premier intervalle temporel. Le signal peut contenir une deuxième trame contenant le même identifiant ou un deuxième identifiant, et d' autres données. La pièce peut comprendre une roue. La pièce peut comprendre un capteur de pression, un capteur de rotation et/ou un capteur de température.The invention also relates to a vehicle part comprising at least one sensor and an emitter connected to the sensor and capable of emitting at a predetermined interval a signal containing an identifier of the sensor. The radio frequency transmitter is capable of transmitting at predetermined intervals a signal comprising a first frame containing a first identifier of the sensor and data, the first frame being transmitted at a first time interval. The signal may contain a second frame containing the same identifier or a second identifier, and other data. The piece may include a wheel. The part may comprise a pressure sensor, a rotation sensor and / or a temperature sensor.
On bénéficie ainsi d'une pièce qui constitue un sous-ensemble d'un véhicule et dont la position par rapport au véhicule peut être déterminée. L'invention concerne également un véhicule comprenant un châssis et une pièce solidaire du châssis et comprenant au moins un capteur et un émetteur relié au capteur et capable d' émettre à intervalles prédéterminés un signal contenant un identifiant du capteur. L' émetteur radiofréquence est capable d' émettre à intervalles prédéterminés un signal comprenant une première trame contenant un premier identifiant du capteur, la première trame étant émise à un premier intervalle temporel. Une deuxième trame peut contenir un deuxième identifiant ou le même, et des données.This provides a part that is a subset of a vehicle and whose position relative to the vehicle can be determined. The invention also relates to a vehicle comprising a chassis and a part integral with the chassis and comprising at least one sensor and an emitter connected to the sensor and capable of emitting at a predetermined interval a signal containing an identifier of the sensor. The radiofrequency transmitter is capable of transmitting at predetermined intervals a signal comprising a first frame containing a first identifier of the sensor, the first frame being transmitted at a first time interval. A second frame may contain a second identifier or the same, and data.
On peut de la sorte surveiller des paramètres d'une pièce du véhicule, par exemple une roue ou une partie de suspension, transmettre les données de surveillance à une unité de gestion, l'unité de gestion étant capable d' identifier la position de la pièce par rapport au châssis du véhicule. Dans le cas d'une roue, la pression du pneumatique, la vitesse de rotation de la roue et la température du pneumatique peuvent être surveillées par des capteurs appropriés, transmis à l'unité de gestion qui peut établir une correspondance entre les données de surveillance et la position d'une roue.In this way, it is possible to monitor parameters of a vehicle part, for example a wheel or a suspension part, to transmit the monitoring data to a management unit, the management unit being able to identify the position of the vehicle. piece relative to the chassis of the vehicle. In the case of a wheel, the tire pressure, the wheel rotation speed and the tire temperature can be monitored by appropriate sensors, transmitted to the management unit which can match the monitoring data. and the position of a wheel.
La présente invention sera mieux comprise à la lecture de la description détaillée d'un mode de réalisation pris à titre d' exemple nullement limitatif et illustré par les dessins annexés, sur lesquels : la figure 1 est une vue schématique d'un véhicule équipé d'un système de gestion de capteurs embarqués ; la figure 2 montre un exemple d' émission des trames.The present invention will be better understood on reading the detailed description of an embodiment taken by way of non-limiting example and illustrated by the appended drawings, in which: FIG. 1 is a schematic view of a vehicle equipped with a an onboard sensor management system; Figure 2 shows an example of transmission of the frames.
Comme on peut le voir sur la figure 1 , le véhicule 1 comprend un châssis 2, quatre roues 3 à 6 reliées au châssis 2, un système antiblocage de roues 7 comprenant un calculateur 8 et quatre capteurs 9 à 12 respectivement dédiés à la mesure de la vitesse de la rotation des roues 3 à 6. Les capteurs 9 à 12 sont montés sur le châssis 2 ou sur un élément non tournant relié au châssis 2. La liaison entre le calculateur 8 et les capteurs 9 à 12 peut être assurée par des fils, multiplexes ou non. Le véhicule 1 comprend en outre un système de gestion 13 de capteurs embarqués prévu pour la surveillance individuelle des roues 3 à 6. Le système de gestion 13 comprend un calculateur 14, un récepteur radiofréquence 15 relié au calculateur 14, un émetteur radiofréquence 16 peut être relié au calculateur 14. Le récepteur 15 et l' émetteur 16 peuvent être reliés à une antenne commune non représentée. Le calculateur 14 est relié au calculateur 8 du système antiblocage de roues 7 pour recevoir les mesures de vitesse effectuées par les capteurs de vitesse 9 à 12.As can be seen in FIG. 1, the vehicle 1 comprises a chassis 2, four wheels 3 to 6 connected to the chassis 2, an anti-lock system of wheels 7 comprising a computer 8 and four sensors 9 to 12 respectively dedicated to the measurement of the speed of rotation of the wheels 3 to 6. The sensors 9 to 12 are mounted on the frame 2 or on a non-rotating element connected to the frame 2. The connection between the computer 8 and the sensors 9 to 12 can be provided by son, multiplexed or not. The vehicle 1 further comprises an onboard sensor management system 13 provided for the individual monitoring of the wheels 3 to 6. The management system 13 comprises a computer 14, a radio frequency receiver 15 connected to the computer 14, a radio frequency transmitter 16 may be connected to the computer 14. The receiver 15 and the transmitter 16 may be connected to a common antenna not shown. The computer 14 is connected to the computer 8 of the anti-lock system of wheels 7 to receive the speed measurements made by the speed sensors 9 to 12.
Chaque roue 3 à 6 comprend un module d' identification 17 pourvu d'un calculateur 18 , de préférence de type relativement simple, par exemple un microcontrôleur, d'un émetteur radiofréquence 19 et d'un récepteur radiofréquence ou LF 20 relié au calculateur. En outre, chaque roue 3 à 6 comprend un capteur de vitesse 21 , un capteur de température 22 et un capteur de pression 23, tous trois reliés au calculateur 18. Le capteur de vitesse 21 peut être du type à bille centrifugée. Les capteurs de température 22 et de pression 23 peuvent être disposés sur une surface extérieure de la jante de la roue, à l' intérieur du pneumatique.Each wheel 3 to 6 comprises an identification module 17 provided with a computer 18, preferably of relatively simple type, for example a microcontroller, a radiofrequency transmitter 19 and a radio frequency receiver or LF 20 connected to the computer. In addition, each wheel 3 to 6 comprises a speed sensor 21, a temperature sensor 22 and a pressure sensor 23, all three connected to the computer 18. The speed sensor 21 may be of the centrifuged ball type. The temperature and pressure sensors 22 may be disposed on an outer surface of the rim of the wheel, inside the tire.
En fonctionnement, le calculateur 18 peut ordonner aux capteurs 21 à 23 de chaque roue 3 à 6 la prise de mesures à des intervalles de temps déterminés ou sur demande du système de gestion 13 afin de réduire la consommation énergétique du système 17. Le calculateur 14 du système de gestion 13 peut émettre par l' émetteur 16 une requête de mesure destinée au récepteur 20 de chaque roue 3 à 6. La requête de mesure est alors traitée par le calculateur 18 qui commande la prise de mesure par les capteurs 21 à 23 et émet en retour par l'intermédiaire de l' émetteur 19 un signal contenant les résultats de mesure prévus pour être détectés par le récepteur 15 du système de gestion 13.In operation, the computer 18 can order the sensors 21 to 23 of each wheel 3 to 6 to take measurements at specified time intervals or at the request of the management system 13 to reduce the energy consumption of the system 17. The computer 14 of the management system 13 can send by the transmitter 16 a measurement request for the receiver 20 of each wheel 3 to 6. The measurement request is then processed by the computer 18 which controls the measurement by the sensors 21 to 23 and transmits back via the transmitter 19 a signal containing the measurement results intended to be detected by the receiver 15 of the management system 13.
Toutefois, il s ' avère qu' à chaque arrêt du véhicule, une ou plusieurs roues sont susceptibles d' être changées ou encore interverties, ce qui ne permet pas au système de gestion 14 d' associer les mesures reçues à la position déterminée d'une roue, avant ou arrière et gauche ou droite. A chaque mise en fonctionnement du véhicule, le calculateur de gestion 14 peut envoyer un ordre d' émission par l'intermédiaire de l' émetteur 16 à destination de chaque roue 3 à 6. Le calculateur 18 peut en fonction de la vitesse décider le fonctionnement décrit ci-après .However, it turns out that at each stop of the vehicle, one or more wheels are likely to be changed or interchanged, which does not allow the management system 14 to associate the received measurements with the determined position of a wheel, before or back and left or right. Each time the vehicle is put into operation, the management computer 14 can send a transmission command via the transmitter 16 to each wheel 3 to 6. The computer 18 may, depending on the speed, decide the operation described below.
Les ordres d'émission sont reçus par le récepteur 20 de chaque roue 3 à 6 et transmis au calculateur 18 qui commande alors une étape de mesure par les capteurs 21 à 23 , puis, ayant reçu les données de mesure en provenance des capteurs 21 à 23 élabore un signal à destination du système de gestion 13, ledit signal étant émis par l' émetteur 19. Ledit signal comprend une première trame contenant un identifiant de la roue.The transmission orders are received by the receiver 20 of each wheel 3 to 6 and transmitted to the computer 18 which then controls a measurement step by the sensors 21 to 23, then, having received the measurement data from the sensors 21 to 23 develops a signal to the management system 13, said signal being emitted by the transmitter 19. Said signal comprises a first frame containing an identifier of the wheel.
La première trame peut avoir une durée de l' ordre de 300 ms et être émise huit fois par seconde pendant 15 minutes puis quatre fois par seconde pendant 45 minutes, soit un total de durée d' émission d'une heure. Le signal comprend également une ou, de préférence, plusieurs deuxièmes trames d'une durée de l' ordre de 30 ms comprenant également un identifiant et des données, notamment des données de mesure des capteurs 21 à 23. A titre d' exemple, cinq deuxièmes trames peuvent être émises toutes les deux secondes .The first frame may have a duration of the order of 300 ms and be transmitted eight times per second for 15 minutes and then four times per second for 45 minutes, for a total duration of emission of one hour. The signal also comprises one or, preferably, several second frames with a duration of the order of 30 ms also comprising an identifier and data, in particular measurement data of the sensors 21 to 23. For example, five second frames can be sent every two seconds.
Le calculateur 14 du système de gestion 13 reçoit de chaque roue un signal comprenant un identifiant de roue, une vitesse, une température et une pression. Le calculateur 14 effectue alors une comparaison entre la vitesse de chaque roue reçue du système antiblocage de roues 7 et la vitesse de chaque roue associée à chaque identifiant de roue et effectue un appariement entre chaque identifiant et la position réelle de la roue connue d' après la position des capteurs 9 à 12 fixes par rapport au châssis 2.The computer 14 of the management system 13 receives from each wheel a signal comprising a wheel identifier, a speed, a temperature and a pressure. The computer 14 then makes a comparison between the speed of each wheel received from the anti-lock system 7 and the speed of each wheel associated with each wheel identifier and performs a matching between each identifier and the actual position of the wheel known from the position of the sensors 9 to 12 fixed relative to the chassis 2.
Dès que le véhicule prend un virage, les vitesses des quatre roues 3 à 6 deviennent différentes, d' où la possibilité en connaissant la vitesse de la roue et sa position grâce au signal reçu par le système antiblocage 7 d' associer l' identifiant et la position de chaque roue. Après qu'une certaine distance, par exemple 1 km, a été parcourue par le véhicule, ou une durée de routage suffisante a été effectuée, la probabilité est suffisante que le véhicule ait pris un virage significatif suffisant pour que les différences de vitesses entre les roues soient supérieures à la résolution des capteurs et à la précision des calculateurs .As soon as the vehicle turns, the speeds of the four wheels 3 to 6 become different, hence the possibility knowing the speed of the wheel and its position thanks to the signal received by the anti-lock system 7 to associate the identifier and the position of each wheel. After a certain distance, for example 1 km, has been traveled by the vehicle, or a sufficient routing time has been carried out, the The probability is sufficient that the vehicle has made a significant turn sufficient for the differences in speeds between the wheels to be greater than the resolution of the sensors and the accuracy of the computers.
On dispose ainsi d'un système très fiable permettant de déterminer la position d'une roue et d' y associer des paramètres faisant l' objet de mesures, notamment de mesures de sécurité telles que la température et la pression. On accroît ainsi considérablement la sûreté de fonctionnement du véhicule et le tableau de bord peut indiquer au conducteur la position d'une roue subissant une pression et/ou une température inadéquates . There is thus a very reliable system for determining the position of a wheel and for associating measured parameters, including safety measures such as temperature and pressure. This considerably increases the operational safety of the vehicle and the dashboard can indicate to the driver the position of a wheel under pressure and / or inadequate temperature.

Claims

REVENDICATIONS
1 -Système de gestion ( 13) de capteurs embarqués à bord d'un véhicule ( 1 ), caractérisé par le fait qu'il comprend une unité de gestion ( 14) et un récepteur radiofréquence ( 15) relié à l'unité de gestion, le récepteur radiofréquence étant capable de recevoir des signaux en provenance d' émetteurs radiofréquence (20), les émetteurs radiofréquence (20) étant chacun relié à au moins un capteur et capables d' émettre à intervalles prédéterminés un signal comprenant une trame contenant un identifiant du capteur et des données, la première trame étant émise à un premier intervalle temporel, l'unité de gestion étant configurée pour identifier ledit émetteur à réception de l' identifiant et pour déterminer la position dudit émetteur, caractérisée en ce que l'unité de gestion ( 14) est configurée pour comparer une vitesse mesurée contenue dans une deuxième trame et une vitesse mesurée par un autre capteur.1 -System (13) for management of sensors embedded in a vehicle (1), characterized in that it comprises a management unit (14) and a radiofrequency receiver (15) connected to the management unit , the radio frequency receiver being capable of receiving signals from radiofrequency transmitters (20), the radiofrequency transmitters (20) being each connected to at least one sensor and capable of transmitting, at predetermined intervals, a signal comprising a frame containing an identifier sensor and data, the first frame being transmitted at a first time interval, the management unit being configured to identify said transmitter upon receipt of the identifier and to determine the position of said transmitter, characterized in that the management (14) is configured to compare a measured speed contained in a second frame and a speed measured by another sensor.
2-Système selon la revendication 1 , dans lequel la puissance d' émission est fonction de la vitesse de la roue.2-System according to claim 1, wherein the transmission power is a function of the speed of the wheel.
3-Système selon la revendication 1 ou 2, dans lequel le premier intervalle est compris entre 5 et 64 secondes, et la durée des trames est comprise entre 0, 1 et 1 seconde.3-system according to claim 1 or 2, wherein the first interval is between 5 and 64 seconds, and the duration of the frames is between 0, 1 and 1 second.
4-Système selon l'une quelconque des revendications précédentes, dans lequel l'unité de gestion comprend un moyen pour comparer une vitesse fournie par un capteur non tournant de vitesse et une vitesse fournie par un capteur tournant de vitesse, et un moyen pour apparier un identifiant et une position de roue.A system according to any one of the preceding claims, wherein the management unit comprises means for comparing a speed provided by a non-rotating speed sensor and a speed provided by a speed rotating sensor, and means for matching an identifier and a wheel position.
5-Système selon l'une quelconque des revendications précédentes, dans lequel le signal comprend cinq trames .A system as claimed in any one of the preceding claims, wherein the signal comprises five frames.
6-Système selon l'une quelconque des revendications précédentes, dans lequel le signal comprend une deuxième trame contenant le même identifiant ou un deuxième identifiant, et des données .A system according to any one of the preceding claims, wherein the signal comprises a second frame containing the same identifier or a second identifier, and data.
7-Pièce de véhicule, caractérisée par le fait qu'elle comprend au moins un capteur (21 ) et un émetteur (20) relié au capteur et capable d' émettre à intervalles prédéterminés un signal comprenant une trame contenant un identifiant du capteur et des données, la première trame étant émise à un premier intervalle temporel, l'unité de gestion étant capable d'identifier ledit émetteur à réception de l' identifiant et de déterminer la position dudit émetteur, caractérisée en ce que l'unité de gestion ( 14) est configurée pour comparer une vitesse mesurée contenue dans une deuxième trame et une vitesse mesurée par un autre capteur.7-vehicle part, characterized in that it comprises at least one sensor (21) and a transmitter (20) connected to the sensor and capable of transmitting at predetermined intervals a signal comprising a frame containing an identifier of the sensor and data, the first frame being transmitted at a first time interval, the management unit being able to identify said transmitter upon receipt of the identifier and to determine the position of said transmitter, characterized in that the management unit (14) ) is configured to compare a measured speed contained in a second frame and a speed measured by another sensor.
8-Pièce selon la revendication 7, comprenant une roue (3) .8-piece according to claim 7, comprising a wheel (3).
9-Pièce selon la revendication 7 ou 8, comprenant un capteur de pression (22), un capteur de rotation (21 ), et un capteur de température (23) .9-piece according to claim 7 or 8, comprising a pressure sensor (22), a rotation sensor (21), and a temperature sensor (23).
10-Véhicule ( 1 ) comprenant un châssis et une pièce selon l'une des revendications 7 à 9, solidaire du châssis . 10-vehicle (1) comprising a frame and a part according to one of claims 7 to 9, integral with the frame.
EP07823830A 2006-09-19 2007-09-14 System for managing onboard sensors, corresponding vehicle part and vehicle Withdrawn EP2064076A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0608179A FR2906063B1 (en) 2006-09-19 2006-09-19 ONBOARD SENSOR MANAGEMENT SYSTEM, CORRESPONDING VEHICLE PART AND VEHICLE
PCT/FR2007/051935 WO2008034993A2 (en) 2006-09-19 2007-09-14 System for managing onboard sensors, corresponding vehicle part and vehicle

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EP2064076A2 true EP2064076A2 (en) 2009-06-03

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EP07823830A Withdrawn EP2064076A2 (en) 2006-09-19 2007-09-14 System for managing onboard sensors, corresponding vehicle part and vehicle

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EP (1) EP2064076A2 (en)
FR (1) FR2906063B1 (en)
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US5483827A (en) * 1994-06-03 1996-01-16 Computer Methods Corporation Active integrated circuit transponder and sensor apparatus for sensing and transmitting vehicle tire parameter data
US5825286A (en) * 1995-05-08 1998-10-20 Semisystems, Inc. Vehicular data collection and transmission system and method
US6292096B1 (en) * 1999-12-15 2001-09-18 Trw Inc. Apparatus and method for transmitting data in a tire condition sensing system
DE10144360B4 (en) * 2001-09-10 2018-12-27 Continental Automotive Gmbh Method for assigning tire pressure measuring devices of a motor vehicle to wheel positions and device for measuring the tire pressure
JP2005119370A (en) * 2003-10-14 2005-05-12 Pacific Ind Co Ltd Transmitter of tire condition monitoring device

Non-Patent Citations (1)

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Title
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FR2906063A1 (en) 2008-03-21
FR2906063B1 (en) 2011-08-05
WO2008034993A2 (en) 2008-03-27
WO2008034993A3 (en) 2008-05-08

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