• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for transmitting n identification signals (P1-P4) formulated according to n different protocols, by an electronic control unit (6) equipping a wheel (2) of a vehicle, within the framework of a angular correlation localization procedure. According to the invention, an electronic box (6) programmed to perform, by wheel revolution, x controlled transmissions for x angular positions offset from one another by predetermined angular values and, during each transmission, an angular position is determined of the electronic control unit (6) to which the reference angular position function is assigned for determining the x angular emission positions of said electronic control unit, and a burst of n identification signals transmitted consecutively for angular positions is transmitted; successive emission of the electronic box (6), each of said signals being formulated according to one of the n protocols and comprising identification data of the electronic unit and its emission angular position.
    公开号:FR3015370A1
    申请号:FR1363166
    申请日:2013-12-20
    公开日:2015-06-26
    发明作者:Nicolas Guinart；Jean-Charles Huard；Sebastien Kessler
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to a method of transmitting identification signals formulated according to n different protocols, by an electronic unit equipping a wheel of a vehicle, in the context of a procedure for locating said wheel. Numerous methods are presently proposed for locating the position of the wheels of a vehicle equipped with a tire operation parameter monitoring system mounted on these wheels, including angular correlation locating methods, such as that in particular described in patents EP 0 806 306 and EP 0 895 879, and FR 2 974 033, the concept of which relies on the correlation existing between the signals delivered by an angular sensor 10 fitted to a wheel and the signals delivered by a speed sensor mounted on the vehicle near this wheel. Since most of the current vehicles are equipped with active safety systems such as ABS anti-lock braking system, ESP system for dynamic stability control, such locating methods have a major interest in terms of cost of ownership. installation, because the location of the wheels is effected by correlation of the signals delivered by the speed sensors of said active safety system and the signals delivered by the angular sensors normally integrated in the electronic boxes of the monitoring system. As a result, the implementation of these location methods simply requires the implementation of a software for processing the delivered signals but does not require any additional hardware. Usually, the monitoring systems are directly installed on the new vehicles so that the central unit and the electronic boxes are designed to interact by means of a specific protocol. On the other hand, an evolution has consisted in producing so-called "universal" electronic boxes such as in particular described in US Pat. No. 7,518,495, intended to be retrofitted on vehicles and designed, for this purpose, to emit signals formulated according to several protocols in order to be able to communicate with the central units of vehicles of different brands and / or models. The present invention is part of this evolution and its first objective is to provide a method of transmitting, by an electronic box, identification signals formulated according to n protocols, leading, during the implementation of FIG. an angular correlation localization procedure, to an optimal reduction of the energy consumption of the electronic boxes.
    [0002] Another object of the invention is to provide a transmission method leading to increase the performance of angular correlation localization methods in terms of responsiveness and reliability. For this purpose, the invention aims at a method for transmitting identification signals P1-Pn formulated according to n different protocols, by an electronic unit equipping a wheel of a vehicle, as part of a location procedure, said transmission method consisting, according to the invention, on the one hand, to use electronic boxes programmed to perform, by wheel revolution, x controlled transmissions for x angular positions offset from each other by predetermined angular values and on the other hand, during each transmission: - to determine a fixed angular position of the electronic unit to which the reference angular position function is attributed for the determination of the x angular emission positions of said electronic box, 15 - and to emit a burst of n consecutively transmitted identification signals for successive transmission angular positions of the electronic unit, each of said s signals being formulated according to one of the n protocols and comprising the identification code of the electronic unit and identification data of its angular emission position. It should be noted that, according to the invention, the term "protocol" is intended to mean the definition of the rules making it possible to establish a dialogue between an electronic unit mounted on a wheel of a vehicle and a central unit located in said vehicle, said protocol resulting in a format in which the messages are developed, defining in particular the sequence and the length of each parameter, (number of bits assigned to each parameter ...). According to the invention, each transmission of the n identification signals requires a procedure for determining the reference angular position at the end of which the n different identification signals, each formulated according to a given protocol, are delivered in the form of a burst of n consecutive signals each transmitted for one of the predetermined angular positions of the electronic box. This methodology leads to a low energy consumption of the electronic boxes because it only requires a single procedure for determining the angular position of reference. Indeed, such procedures, in particular described in patents FR 2 974 033 (for electronic boxes mounted on the rim of the wheels) and FR 2 985 014 (for the electronic boxes positioned on the tread of the tires), require an increased sampling and filtering of the measurements provided by the angular sensors integrated in the electronic boxes, which prove to lead to a significant energy consumption. Thus, the fact of requiring only one of these procedures for each transmission leads to an optimization of the energy consumption of the electronic boxes, and to obtaining, for the correlation localization procedure, an overall consumption of 5 order of that generated by a correlation localization procedure performed with a conventional electronic box emitting signals formulated according to a single protocol. According to another advantageous embodiment of the invention aimed at increasing the quality of reception of the identification signals: for each protocol, the transmission time of an identification signal formulated according to FIG. said protocol, - and, before each transmission, the speed of rotation of the wheel is determined, and in order to achieve the effective transmissions of the n identification signals, a series of angular transmission positions separated from each other is selected. angular distances adapted so that all of each of the 15 identification signals is transmitted between two transmission commands. This embodiment therefore leads, especially for high rotation speeds and / or for protocols leading to significant transmission times, to obscure angular emission positions, that is to say not to command for transmitting a signal for said angular positions, so as to guarantee the completeness of the transmission of the transmitted identification signals for the angular positions preceding these occulted angular positions. In addition, in order to judge the opportunity of possible occultations, it is advantageous to determine, according to the invention, a threshold value for the rotational speed of the wheel: below which no one of the angular emission positions is occult and therefore an identification signal is emitted successively for each of the angular emission positions, beyond which at least one of the angular emission positions is obscured, and a series of positions is selected for this purpose. angular transmission 30 adapted so that all of each of the identification signals is transmitted between two transmission commands. According to another advantageous embodiment of the invention, the angular emission position of each of the identification signals formulated according to the protocols P1-Pn is modified between two bursts, so that each identification signal Pi is emitted successively for a plurality of angular emission positions. This mode of implementation leads to increase the performance of the location method in terms of responsiveness and reliability. Indeed, each identification signal is transmitted for a plurality of angular transmission positions offset relative to each other of given angular values. As a result, the transmission method satisfies the current requirements which require a sufficient variety of predetermined transmission angles to guarantee the proper functioning of the location function, in particular despite the so-called "black spot" reception defects phenomena. (shadow or non-reception area in English), whatever the nature of the vehicles equipped with the surveillance system. Other features, objects and advantages of the invention will emerge 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: - Figure 1 is a schematic top view of a vehicle with a monitoring system and an active safety system for implementing the method according to the invention for transmitting signals d identification in the context of a procedure for locating the position of the wheels of said vehicle; FIG. 2 is a representative diagram of a wheel illustrating the principle of the method according to the invention in an example of setting implemented for the transmission of identification signals formulated according to 4 different protocols, 20 - and Figures 3a and 3b are representative diagrams of a wheel illustrating the principle of transmission of two successive bursts consisting of the example in two bursts of 8 identification signals. The transmission method according to the invention is adapted to be implemented in the context of a procedure for locating the position of wheels of a vehicle V as shown in FIG. 1, provided with four wheels 1- 4 and equipped with a monitoring system for parameters, such as pressure and / or temperature, tires, and an active safety system such as "ABS" anti-lock braking system or "ESP" dynamic control system stability. In the usual way, the monitoring system conventionally comprises, firstly, associated with each wheel 1-4, an electronic box 5-8, for example secured to the rim of said wheel so as to be positioned inside. tire envelope. Each of these electronic boxes 5-8 includes sensors dedicated to measuring the parameters of the tires, connected to a microprocessor computing unit connected to a transmitter 10. Each of these electronic boxes 5-8 also integrates, in a conventional manner, measuring means 9 of the angular position of said electronic box. Such measuring means can advantageously consist, when the electronic boxes are mounted on the rims of the wheels 1-4, an accelerometer capable of providing modulated signals representative of the values of the gravity and therefore the angular position of the electronic housing, including the frequency, equal to the frequency of rotation of the wheels, also makes it possible to calculate the speed of rotation of said wheels. In the case of electronic boxes 5-8 positioned on the inner face of the tread of the tires, the measuring means 9 advantageously consist of sensors for measuring the radial acceleration of the wheel, of the electromechanical microsystem type, piezoelectric sensor , shock sensor, also suitable, such as in particular described in FR 2 985 014, to provide data for calculating the speed of rotation of the wheels. In addition, according to the invention, each of these electronic boxes 5-8 comprises storage means of n different protocols intended to allow the emission of signals formulated according to each of these protocols.
    [0003] Finally, according to the invention, each of these electronic boxes 5-8 is programmed to perform, per wheel revolution, x controlled transmissions for x angular positions offset from one another by predetermined angular values. As one of the most common examples, such electronic boxes 5-8 can thus be programmed to control, by wheel revolution: two transmissions for angular positions offset by 90 ° or 180 °, four transmissions for positions angular offset by 90 °, - eight emissions for angular positions offset by 45 °. The monitoring system also comprises a central unit 11 located in the vehicle V, comprising a microprocessor and integrating a receiver 12 able to receive the signals emitted by the emitters 10 of each of the four electronic boxes 5-8. The vehicle V is also equipped with an active safety system such as "ABS" system of anti-lock wheels, "ESP" system of dynamic stability control, comprising four wheel speed sensors 13-16 positioned on the vehicle 30 V, each close to a wheel 1-4, and adapted to provide, in the form of values convertible into angular values, data representative of the orientation of said wheel. In addition, this active safety system comprises an "ABS" or "ESP" computer 17 connected to the various wheel speed sensors 13-16, so as to receive the wheel speed information measured by said sensors, and programmed to anticipate the regulations intended to prevent the locking of the wheels 1-4.
    [0004] Usually, the wheel speed sensors 13-16 consist of inductive, magneto-resistive or Hall effect sensors adapted to measure the speed of each wheel 1-4 on a toothed or magnetic wheel. If n is the number of memorized protocols, in the context of a procedure for locating a wheel 1-4, the electronic unit 5-8 fitted to this wheel 1-4 is designed to periodically transmit n identification signals P1 -Pn each formulated according to a different protocol. The transmission recurrence of these n signals is of the order of several seconds, generally 15 to 20 seconds, in view of a part of the respect of the radio frequency standards, and secondly, to allow sufficient desynchronization of the wheels 1 -4. According to the invention, and in the first place, a preliminary step consists in: calculating, for each protocol, the transmission time of an identification signal formulated according to said protocol, deriving from this calculation a value rotation speed threshold below which the completeness of each of the identification signals can be transmitted between two successive transmission angular positions without the risk of overlap between the end of transmission of an identification signal and the beginning transmission of the next identification signal. By transmission of "the entirety of a signal" is meant to define the effective time of transmission of an identification signal plus a time interval allowing the central unit 11 to detect the interruption of program. Subsequently, for each of the transmissions, the method according to the invention consists in: - calculating the rotational speed of the wheel 1-4 deduced from the period of the curve representative of the gravity provided by the accelerometer 9 to be determined (for example by increased sampling and filtering of the measurements provided by the accelerometer 9) a fixed angular position of the electronic box 5-8 to which the reference angular position function is assigned for the determination of the x angular positions for transmitting said electronic box, and to emit a burst of n identification signals transmitted consecutively for successive transmission angular positions of the electronic box 5-8, each of said signals being formulated according to one of the n protocols and comprising In particular, the identification code of the electronic box 5-8 and the identification data of the transmission angular position.
    [0005] In addition, the angular emission positions selected for the emission of this burst, are a function of the result of the comparison between the effective rotational speed and the threshold speed. Thus, if the rotational speed is less than or equal to the threshold speed, an identification signal is emitted successively for each of the transmission angular positions. On the other hand, if the speed of rotation is greater than the threshold speed, certain angular emission positions are obscured and, for this purpose, a series of angular emission positions separated from each other by angular distances adapted to that the entirety of each of the identification signals is transmitted between two transmission commands. In view of this selection, a first solution may consist in establishing and memorizing a plurality of scenarios designed to respond to a given situation. A second usual solution may also consist in making this selection by means of a suitable algorithm. Furthermore, the angular emission position of each of the identification signals P1-Pn is modified between two successive transmissions so that each identification signal Pi is transmitted successively for a plurality of angular transmission positions.
    [0006] Thus, the transmission method satisfies the current requirements which require a sufficient variety of predetermined transmission angles to ensure the proper functioning of the location function, despite the existence of black-out zones. . FIG. 2 shows a wheel 2 equipped with an electronic box 6 programmed to perform, by wheel revolution, 4 controlled transmissions for 4 angular positions (referenced 1 to 4) offset from each other by 90 °, allowing, according to FIG. the example shown, to emit a burst of 4 identification signals P1-P4 transmitted consecutively each for one of the angular transmission positions of the electronic unit 6.
    [0007] It should be noted that, according to the example shown, the transmission time of each of the 4 identification signals makes it possible to transmit these 4 identification signals without the risk of overlap between the end of transmission of a signal of identification and transmission start of the next identification signal. Otherwise, for example, resulting, for example, from a higher rotational speed of the wheel 2 affecting the transmission of the entire identification signal P3 (signal whose transmission time is the highest according to this example ), the burst of the 4 identification signals can be performed on two successive wheel turns 2. Thus the two identification signals P1 and P2 can be transmitted during a first wheel revolution for angular positions shifted by 90 ° or 180 °, then the two identification signals P3 and P4 transmitted during a second wheel turn for angular positions offset by 180 °. Another selection may also consist in transmitting the three identification signals P1 to P3 during a first wheel revolution for angular positions offset by 90 °, then in transmitting the identification signal P4 during a second rotation of Wheel 2. FIGS. 3a and 3b show a wheel 2 equipped with an electronic box 6 programmed to perform, by wheel revolution, 8 controlled emissions for 8 angular positions (referenced 1 to 8) offset from each other by 45 ° , allowing, according to the example shown, to emit a selve of 8 P1-P8 identification signals each consecutively transmitted for one of the angular transmission positions of the electronic unit 6. In addition, these two figures represent the wheel 2 during the transmission of two successive bursts, between which the angular emission position of each of the identification signals P1-P8 has been shifted one rank, that is to say 45 °, so that, 2 0 according to this shift principle, in a series of eight transmissions, each identification signal Pi is emitted successively for all the angular transmission positions. As for the previous example, each burst of eight identification signals may, in addition, be performed on a single wheel revolution, as shown, or two or three successive turns.
    权利要求:
    Claims (3)
    [0001]
    CLAIMS1 / Method for transmitting identification signals (P1-Pn) formulated according to n different protocols, by an electronic box (5-8) equipping a wheel (1-4) of a vehicle (V), in the frame a correlation localization procedure between measurements provided by an angular sensor (9) integrated in said electronic box and measurements provided by a speed sensor (13-16) mounted on the vehicle (V) in the vicinity of the said wheel, said transmission method being characterized in that: - an electronic box (5-8) programmed to perform, by wheel revolution, x controlled transmissions for x angular positions offset from one another by angular values is used predetermined, and in that, during each transmission: a fixed angular position of the electronic box (5-8) is determined, to which the reference angular position function is assigned for the determination of the x angular positions the transmission of said electronic box, - and a burst of n identification signals transmitted consecutively transmitted for successive angular transmission positions of the electronic box (5-8), each of said signals being formulated according to one of the n protocols and comprising the identification code of the electronic box (5-8) and identification data of its emission angular position.
    [0002]
    2 / A transmission method according to claim 1 characterized in that: - is determined for each protocol, the transmission time of an identification signal formulated according to said protocol, - and before each transmission is determined the rotational speed of the wheel (1-4), and in order to achieve the effective emissions of the n identification signals, a series of angular emission positions separated from each other by angular distances adapted so that the the entirety of each of the identification signals is transmitted between two transmission commands.
    [0003]
    3 / A method of transmission according to claim 2 characterized in that a threshold value of rotational speed of the wheel (1-4) is determined below which is transmitted an identification signal successively for each of the angular positions. transmission, and beyond which is selected a series of angular transmission positions adapted so that the entirety of each of the identification signals is transmitted between two transmission commands. any one of claims 1 to 3 characterized in that it consists in modifying, between two bursts, the angular emission position of each of the identification signals (P1-Pn) so that each identification signal (Pi ) is emitted successively for a plurality of angular emission positions.
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    引用文献:
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    法律状态:
    2015-12-21| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-22| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-12-19| PLFP| Fee payment|Year of fee payment: 7 |
    2020-12-23| PLFP| Fee payment|Year of fee payment: 8 |
    2021-12-24| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1363166A|FR3015370B1|2013-12-20|2013-12-20|METHOD FOR TRANSMITTING IDENTIFICATION SIGNALS FORMULATED IN ACCORDANCE WITH N DIFFERENT PROTOCOLS, BY AN ELECTRONIC HOUSING EQUIPPING A WHEEL OF A VEHICLE|FR1363166A| FR3015370B1|2013-12-20|2013-12-20|METHOD FOR TRANSMITTING IDENTIFICATION SIGNALS FORMULATED IN ACCORDANCE WITH N DIFFERENT PROTOCOLS, BY AN ELECTRONIC HOUSING EQUIPPING A WHEEL OF A VEHICLE|
    US15/104,756| US9884524B2|2013-12-20|2014-12-15|Method for transmitting identification signals formulated according to N different protocols, using an electronic casing provided on a wheel of a vehicle|
    CN201480069277.8A| CN105813866B|2013-12-20|2014-12-15|The method for the identification signal formulated with the electronic box transmission being located on wheel according to n kinds different agreement|
    PCT/EP2014/003358| WO2015090554A1|2013-12-20|2014-12-15|Method for transmitting identification signals formulated according to n different protocols, using an electronic casing provided on a wheel of a vehicle|
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