Abstract: A method for communication between a wheel unit and a central processing unit of a TPMS system, the wheel unit being intended for integration in a wheel of a motor vehicle. The method includes the following steps, which are aimed at: transmitting a set of transmission frames containing information relating to the wheel that is associated with the wheel unit; and sending an acknowledgement frame once the central processing unit has received a frame of the set of transmission frames transmitted by the wheel unit. The method includes a step which is aimed at interrupting the sending of a frame of said set of transmission frames transmitted by the wheel unit.

Abstract: A method for controlling, by a remote monitoring and/or control device, an activation of a command in a wheel unit that has previously stored a group of authorized UHF communication devices and checked whether a device that has sent a response message belongs to the group. If it does, the wheel unit sends a series of command-related signaling messages with each message associated with a single command. When the authorized device receives a message relating to a specific command that the authorized device requests to have activated by the wheel unit, the authorized device sends back to the wheel unit a standard response message interpreted as an activation order for the wheel unit to activate the specific command.

Abstract: The invention relates to a method for monitoring the wear of a motor vehicle tire. According to the invention, the method comprises the following steps of: acquiring (step E1) acceleration gradient measurements of the tire to be monitored, performing (step E2) processing of said gradient measurements acquired, comparing (step E3) said processed measurements to a predetermined threshold value, transmitting a warning (step E4) when the predetermined threshold value is reached. The invention also relates to a tire pressure monitoring module, comprising hardware and/or software means for implementing said method, said hardware and/or software means being implemented in an integrated circuit.

Abstract: A method for determining a compensated acceleration gradient for a tire of a vehicle including sensors for acquiring signals indicative of variables considered from a group including: the tire pressure of the tire, the footprint quotient and the speed of the vehicle, the compensated acceleration gradient being a function of a raw acceleration gradient, of instantaneous values and of reference values of the variables. The compensated acceleration gradient is a function of compensation factors obtained by a learning phase of acquiring the values for the raw acceleration gradient and of calculating the compensation factors. A tire wear monitoring method and to a motor vehicle for implementing the methods are also disclosed.

Abstract: The invention relates to a method for monitoring the wear of a motor vehicle tire. According to the invention, the method comprises the following steps of: acquiring (step E1), from a tangential acceleration signal of said monitoring module, measurements of a variable in the group comprising a maximum tangential acceleration peak and a minimum tangential acceleration peak, performing (step E2) processing of said measurements of said acquired variable, comparing (step E3) said processed measurements to a predetermined maximum variation threshold value, transmitting a warning (step E4) when said predetermined maximum variation threshold value is reached. The invention also relates to a tire pressure monitoring module for implementing said method.

Abstract: A method for preventing identity theft for a specific electronic control unit of a motor vehicle, when the specific electronic control unit sends a plaintext message, which contains measurement data, to a central electronic control unit of the motor vehicle. The method includes: generating an identifier for selecting a hashing algorithm; acquiring at least one parameter common to the central electronic control unit and the specific electronic control unit; generating a first digital hashing fingerprint of the combination of the plaintext message and of the common parameter, from the identifier for selecting a hashing algorithm; forming a data frame that includes the plaintext message, the identifier for selecting a hashing algorithm and the first digital hashing fingerprint; and sending the data frame to the central electronic control unit.

Abstract: A method for detecting a change in location of at least one wheel of a motor vehicle, the vehicle having at least one central processing unit, one wheel unit which includes an electronic assembly of sensors and which is mounted on the wheel, and one bidirectional communications assembly. The method notably includes a first comparison step, during which a first evaluation pattern is compared with a first reference pattern to determine whether the location of the wheel has changed, the patterns being representative of the effective location of the wheel unit in the motor vehicle.

Abstract: An electronic unit suitable for being positioned on an internal face of a tread of a tire with a view to measuring operating parameters of a vehicle wheel equipped with the tire. The electronic unit includes: a body, configured to be embedded into the thickness of the tire, in a housing provided for this purpose, and includes sensors dedicated to measuring operating parameters of the wheel, a head, arranged at one end of the body, including a circuit board for managing information output from the sensors of the body and a way of communicating with a central unit installed in the vehicle; a way for connecting the elements with which the body is equipped and the elements with which the head is equipped; and a way to supply the electronic unit with power.

Abstract: A method for communication of a plurality of wheel units with one another and with a device for remotely monitoring and/or controlling the wheel units, the wheel units measuring a pressure value of a wheel of a motor vehicle as parameter(s). The units are identified beforehand and each wheel unit may identify the other wheel units, the communication taking place in accordance with a communication standard allowing a bidirectional data exchange. A hub wheel unit storing the pressure values measured by each of the wheel units is selected at least temporarily, the other units being peripheral. The hub unit sends a signaling frame in the direction of the peripheral units, received in a peripheral unit through scanning. The pressure values are communicated between the wheel units and a device solely via the hub unit.

Abstract: A method for locating the position of each wheelset of a motor vehicle. Each wheelset including at least one wheel equipped with an electronic unit including at least one sensor to measure, for the wheel, the extent of the contact patch via which the tire is in contact with the ground, and a transmitter transmitting data regarding the extent of the tire contact patch to a control unit. The motor vehicle includes a load sensor for each of the wheelsets that measures and delivers to the control unit a value for the load supported by the associated wheelset. The method employing, on the one hand, data originating from a sensor able to determine the extent of the contact patch via which a tire is in contact with the ground and, on the other hand, a load sensor able to measure the load supported by a wheelset of the motor vehicle.

Abstract: A method for determining a measurement signal based on a sensor output electrical signal. The electrical signal based on the measured quantity conversion of the electrical signal into a measurement signal. Determining the measurement signal for least two pairs of values by converting the electrical signal into a measurement signal for at least two predetermined electrical signal values, each pair of values including the electrical signal and measurement signal. A mathematical function allowing a measurement signal to be obtained based on the electrical signal is determined based on the pairs of values. The measurement signal being substantially equal to the measurement signal obtained by applying the sensor conversion to the same sensor electrical signal. At least two measurement signals are determined without sensor conversion. Acquisition of the two measurement signals separated by a time shorter than the time to convert an electrical signal into a measurement signal by sensor conversion.

Abstract: A method for calibrating a radial acceleration sensor of a wheel of a vehicle including the following steps: acquisition, by the sensor, of signals Si, each signal Si being acquired during a predetermined time window Wi when the vehicle is in motion, the windows Wi being different from one another; detection, for each time window Wi, of local extrema of the signal Si associated respectively with phase values and detection instants; determination, for each time window Wi, of a frequency Fi of the rotation of the wheel of the vehicle as a function of the phase values and of the detection instants for the local extrema detected; low-pass filtering of the signals Si, so as to obtain, for each time window Wi, a filtered value Zi; calibration of a constant error Ec of the radial acceleration sensor as a function of the filtered values Zi and of the frequencies Fi.

Abstract: A method for determining the position of a radial acceleration sensor of a wheel of a motor vehicle, including: acquiring, by the sensor, signals Si which are acquired during a predetermined time window Wi when the vehicle is in motion, the windows Wi being different from one another; detecting, for each time window Wi, local extrema of the signal Si; determining, for each time window Wi, a frequency Fi of the rotation of the wheel of the vehicle as a function of the phase values and of the detection instants for the local extrema detected; filtering of the signals Si, so as to obtain, for each time window Wi, a filtered value Zi; and determining the radial distance Rc between the radial acceleration sensor and the axis of rotation of the wheel.

Abstract: A method for detecting wheel units mounted at wheels of a vehicle and for detecting wheel mounting positions belonging to each of the wheel units is disclosed. The method comprises the steps of: positioning a mobile communication device at a predetermined start position with respect to the vehicle, moving the mobile communication device from the start position along a path around the vehicle, receiving RF signals from the wheel units and measuring the RF signal strengths thereof by the mobile communication device when moving along the path around the vehicle, performing an analysis of variations of the measured RF signal strengths of the received RF signals depending on the position of the mobile communication device along the path, identifying the wheel units and identifying the wheel mounting positions based on a result of the analysis.

Abstract: A method for controlling an electronic valve for a tire of a motor vehicle including an electronic assembly of sensors and a bidirectional radiofrequency communication assembly, connected to the electronic assembly of sensors. This method is noteworthy in that: in a parked situation and in the effective absence of a user, the electronic assembly of sensors is kept dormant and the communication assembly is kept on standby, and on the arrival of a user, the electronic assembly of sensors is activated by the communication assembly.

Abstract: A method for adjusting a periodicity of communication between a wheel unit and a remote monitoring and/or control device, a communication being carried out using ultra-high-frequency radio waves, the wheel unit sending with a predetermined first periodicity basic signaling messages indicating its presence to any communication device located in an environment of the wheel unit. The wheel unit, having previously stored a group of communication devices authorized to serve as monitoring devices therefor, checks whether the communication device having sent a response message belongs to the group, and, if this is the case, the wheel unit replaces the first periodicity with at least one shorter second periodicity resulting in a more intense two-way exchange for any signaling message subsequently sent from the wheel unit to the authorized device.

Abstract: A method for reconfiguring a device for monitoring a tire, incorporating a pressure sensor and a communication module. The device may receive and store configuration data intrinsic to the tire. Based on pressure measurements and the configuration data, the device generates and stores advanced data relating to use of the tire over time. Following reception of new configuration data, the method includes: detecting a tire change based on the previously stored configuration data and the newly received configuration data, if a tire change is detected: erasing the advanced data from the memory means of the device, if not, retaining the advanced data in the memory of the device.

Abstract: A method for controlling, by a remote monitoring and/or control device, an activation of a command in a wheel unit that has previously stored a group of authorized UHF communication devices and checked whether a device that has sent a response message belongs to the group. If it does, the wheel unit sends a series of command-related signaling messages with each message associated with a single command. When the authorized device receives a message relating to a specific command that the authorized device requests to have activated by the wheel unit, the authorized device sends back to the wheel unit a standard response message interpreted as an activation order for the wheel unit to activate the specific command.

Abstract: A method for pairing a measurement module with a wheel of a vehicle including, for each angular orientation signal associated with a specific wheel received by a computer, the steps of transmitting, by the computer, a measurement signal or a request to transmit a measurement signal to each module, measuring, by the computer or each module, a value of at least one parameter differentiating the signal, performing repetitions of the transmissions of measurement signals for each angular orientation signal received by the computer and storing values of the parameter, pairing a specific wheel with a measurement module when the values are substantially constant with a variation of less than 10% for the values, each wheel being associated with a module at the end of the method.

Abstract: A method for pairing a measurement module with a wheel of a motor vehicle. The wheel revolution frequency value and the total number of acquisitions are sent with the emission angle value to the computer that stored a current angular position for at least one wheel and a series of angular positions. The computer selects angular positions sampled from a series of angular positions up to a total number of acquisitions, then filters the wheel revolution frequency, which filtering is similar to the filtering performed in the measurement module in order to obtain a sampled and filtered angular position and is then compared with the angular position with, for a difference of less than an experimentally predetermined percentage, a validation of the phase shift between the emission angles of the signals of the measurement module and the angular positions.