Abstract: A reliable and precise measurement of tire tread wear, by using wide-band (UWB) pulses and analyzing the signature obtained by reflection of these pulses from the tread, in order to deduce its state of wear therefrom. The tire wear monitoring device (100) includes a control unit (110) for signal control and data processing, this control unit (110) being coupled to a generator of ultra wide band or UWB signals (120), which is itself coupled to an antenna for incident UWB pulse transmission (140), and an antenna for receiving the UWB pulses (150) reflected from at least one interface of the tire tread, the reception antenna (150) being coupled to a pulse signal receiver (180) which is itself coupled to the control unit (110).

Abstract: Disclosed is a method for communicating measurement messages between a plurality of electronic measurement modules and an electronic control unit of a motor vehicle. The method includes the steps of measurement (E1), by a primary emitter module, of parameter values associated with the wheel in which the module is mounted, of sending (E2), by the primary emitter module, of measurement messages to a relay module, of reception (E3) by the relay module, of the measurement messages sent, of measurement (E5), by the relay module, of parameter values associated with the wheel in which the relay module is mounted and of sending (E6), by the relay module, of the measurement messages received and of its own measurements to the electronic control unit.

Abstract: A method for determining a vehicle wheel's radial acceleration for a tyre pressure monitoring system, having a central electronic unit. The wheels each including a wheel unit attached to a rim or to a valve or the tyre tread's inner face, and including at least one radial acceleration sensor at a distance from the wheel's rotational axis, to measure the wheel's radial acceleration when it is not saturated, and a microprocessor, including: when the radial acceleration sensor is not saturated, measuring the radial acceleration of the wheel using the radial acceleration sensor; determining the wheel's rotation period; deducing, from the radial acceleration and the period, the distance of the wheel unit; storing the distance in the wheel unit's memory; and when the radial acceleration sensor is saturated, determining the wheel's rotation period, and calculating the radial acceleration from the rotation period and the stored distance.

Abstract: Disclosed is a method of locating a plurality of electronic measuring modules mounted in the wheels of a motor vehicle. The method includes the steps of determination (E1) by each electronic measuring module of a set of proximity scores with respect to the other modules, sending (E2) by each module of the set of proximity scores to the electronic control unit, reception (E3) by an electronic control unit of the sets of proximity scores sent, and location (E4) of each module from the sets of proximity scores received.

Abstract: A method for configuring an electronic housing mounted on a wheel of a motor vehicle for the purposes of transmitting signals intended for a central unit incorporated into the motor vehicle, involving dividing one turn of the wheel into a predetermined number n of referenced sectors, commanding the emission of a sequence of n successive signals, referred to as configuration signals, which are synchronized with the n referenced sectors and of emission duration tem?T/n, where T is the period of rotation of the wheel, identifying and memorizing the referenced sectors corresponding to the configuration signals received by the central unit, and configuring the electronic housing by selecting at least one of the identified referenced sectors for the subsequent emission of the signals intended for the central unit.

Abstract: A method for adapting the strategy for acquiring measurements of the radial acceleration of the wheel sensors of a tire pressure monitoring system of a motor vehicle during phases in which the vehicle is stationary, in which the wheel sensors periodically measure parameters pertaining to the tires of the corresponding wheels, namely at least pressure, temperature and acceleration parameters. The method includes switching the radial acceleration measurement acquisition strategy of a wheel sensor during the “non-running” phases of the vehicle, between at least two state-of-activity modes, switching from a so-called “sleep” acquisition mode to a so-called “awake” acquisition mode when a pressure event is detected by the tire pressure monitoring system of the motor vehicle, the radial acceleration then being measured according to a period of significantly longer duration in “sleep” mode than in “awake” mode.

Abstract: Disclosed is a method for driving a processor of an electronic box mounted on a vehicle wheel, transmitting operating parameters of the wheel for implementation of a specific application by a central unit. This includes defining, for each specific application, the physical quantities liable to affect the relevance of the operating parameters, and ranges of measured values corresponding to conditions for obtaining relevant values of the operating parameters. Also included is a procedure for acquiring and transmitting the operating parameters consisting of a succession of transmission windows, during each of which the physical quantities selected for the application are measured, it is checked whether the conditions for obtaining relevant values of the operating parameters are met. If so, at least one value of each parameter is acquired and transmitted, while assigning to this value a datum attesting to the relevance of the latter, and then the transmission window is closed.

Abstract: Disclosed is a method of locating a plurality of electronic measuring modules mounted in the wheels of a motor vehicle. The method includes the steps of determination (E1) by each electronic measuring module of a set of proximity scores with respect to the other modules, sending (E2) by each module of the set of proximity scores to the electronic control unit, reception (E3) by an electronic control unit of the sets of proximity scores sent, and location (E4) of each module from the sets of proximity scores received.

Abstract: Disclosed is a method of locating the position of wheels of a vehicle equipped with an electronic unit for measuring operating parameters of each wheel, involving, for the purpose of locating the position of a wheel, the ordering of the transmission, by the electronic unit outfitting that wheel, of n RFi signals transmitted at times t1 to tn for angular positions ?1 to ?n of the electronic unit, to a central unit additionally connected to speed sensors that are each positioned in proximity to a wheel and able to furnish data ?1 representative of the orientation of the wheel.

Abstract: Disclosed is a method for driving a processor of an electronic box mounted on a vehicle wheel, transmitting operating parameters of the wheel for implementation of a specific application by a central unit. This includes defining, for each specific application, the physical quantities liable to affect the relevance of the operating parameters, and ranges of measured values corresponding to conditions for obtaining relevant values of the operating parameters. Also included is a procedure for acquiring and transmitting the operating parameters consisting of a succession of transmission windows, during each of which the physical quantities selected for the application are measured, it is checked whether the conditions for obtaining relevant values of the operating parameters are met. If so, at least one value of each parameter is acquired and transmitted, while assigning to this value a datum attesting to the relevance of the latter, and then the transmission window is closed.

Abstract: A method for transmitting n identification signals (P1-P4) formulated according to n different protocols, using an electronic casing (6) provided on a wheel (2) of a vehicle, as part of an angular correlation locating procedure. An electronic casing (6) is used, which is programmed to carry out, per wheel turn, x transmissions commanded for x angular positions offset from each other by predetermined angular values and, during each sending operation, a fixed angular position of the electronic casing (6) is determined, to which position is assigned the reference angular position function for determining the x transmission angular positions of the electronic casing, and a burst of n identification signals sent consecutively for transmission successive angular positions of the electronic casing (6) is transmitted, each of the signals being formulated according to one of the n protocols and including data for identifying the electronic casing and the transmission angular position thereof.

Abstract: Disclosed is a method for detecting an inclination, relative to the ground, of a wheel of a motor vehicle which includes: —measuring two accelerations by using two accelerometers mounted on the wheel and suitable for measuring the acceleration of the wheel along a first axis and along a second axis, respectively, the first axis and the second axis being in the plane of the wheel and orthogonal, and —calculating the components of a gravity vector in a reference frame formed by the first axis and the second axis from the measurements of acceleration, —determining a modulus of the gravity vector from the calculated components, and —determining a position of inclination of the wheel relative to the ground by comparing the value of the modulus of the gravity vector with a predetermined value.

Abstract: In a method for controlling a processor on a wheel, wheel operation parameters are calculated and transmitted to a CPU. A first default operating mode (standby mode) is defined, during which activities related to calculating and checking the characteristic data of the tread mark of the tire are deactivated, a second operating mode for detection of significant changes in the value of a characteristic datum of the tread mark, sought during the appearance, in standby mode, of at least one event likely to be preceded by a significant change in the value, and a third operating mode for calculation and transmission, to a CPU, a sequence of values representing the characteristic datum of the footprint, sought during the confirmation, in detection mode, of a significant change in the value of the characteristic datum of the tread mark, and at the end of which a switch is made into monitoring mode.

Abstract: Disclosed is a method for communicating measurement messages between a plurality of electronic measurement modules and an electronic control unit of a motor vehicle. The method includes the steps of measurement (E1), by a primary emitter module, of parameter values associated with the wheel in which the module is mounted, of sending (E2), by the primary emitter module, of measurement messages to a relay module, of reception (E3) by the relay module, of the measurement messages sent, of measurement (E5), by the relay module, of parameter values associated with the wheel in which the relay module is mounted and of sending (E6), by the relay module, of the measurement messages received and of its own measurements to the electronic control unit.

Abstract: Disclosed is a method of locating a plurality of electronic measuring modules mounted in the wheels of a motor vehicle. The method includes the steps of determination (E1) by each electronic measuring module of a set of proximity scores with respect to the other modules, sending (E2) by each module of the set of proximity scores to the electronic control unit, reception (E3) by an electronic control unit of the sets of proximity scores sent, and location (E4) of each module from the sets of proximity scores received.

Abstract: The invention relates to a method for locating the position of wheels (5-8) of a vehicle (V) comprising, mounted on each wheel, an electronic unit (1-4) incorporating measurement means (9) for measuring a predetermined operating parameter for said wheel, referred to as a location parameter and, assigned to each wheel position and mounted on the vehicle (V), fixed means (13-16) for measuring the location parameter for said wheel. This location method consists, firstly, for each electronic unit (1-4), in comparing the values measured by the mobile measurement means (9) incorporated into said electronic unit with those measured by each of the fixed measurement means (13-16), secondly, for each wheel position, comparing the values measured by the fixed measurement means (13-16) assigned to said wheel position with those measured by each of the mobile measurement means (9), then assigning a wheel position to an electronic unit (1-4) when these correspond with one another.

Abstract: Method for transmitting a radio signal between a moving electronics unit of a wheel and a fixed central electronic control unit of the vehicle, includes: defining an angular reference point of the wheel; defining a division of one wheel revolution into successive basic sectors, and transmitting successive radio signals between the two units so that each signal is transmitted at a calculated predetermined wheel angular position; calculating the angular rotation speed of the wheel; determining a minimum wheel rotation sector required for the transmission time of a signal between the two units, at the calculated angular rotation speed; determining an angular offset of transmission between a first and a second following signal, with respect to the angular reference point, as being equal to the smallest multiple of the basic division sector which covers the time required for transmission of the first radio signal at the calculated angular rotation speed.

Abstract: An angular position is determined for an electronic module fixed to the inner face of the tread of a tire fitted to a wheel of a vehicle. A sensor for measuring the radial acceleration of the wheel is integrated into the electronic module, and a variation of the radial acceleration is detected that corresponds to a position of the electronic module when it contacts the ground. This variation is used to determine a frame of reference defined by an origin and a reference unit corresponding to an angular sector of the tire having a length is shorter than a mean length of the footprint of the grounded tire, in order to determine angular positions of the electronic module in the frame of reference.

Abstract: A reliable and precise measurement of tire tread wear, by using wide-band (UWB) pulses and analyzing the signature obtained by reflection of these pulses from the tread, in order to deduce its state of wear therefrom. The tire wear monitoring device (100) includes a control unit (110) for signal control and data processing, this control unit (110) being coupled to a generator of ultra wide band or UWB signals (120), which is itself coupled to an antenna for incident UWB pulse transmission (140), and an antenna for receiving the UWB pulses (150) reflected from at least one interface of the tire tread, the reception antenna (150) being coupled to a pulse signal receiver (180) which is itself coupled to the control unit (110).

Abstract: A method for detecting a displacement of a motor vehicle including a plurality of wheels each including a tire inflated by inflation gases, includes the steps of: periodically measuring (E1), at a standby frequency, the temperature of the inflation gases of the tire, comparing (E2) the values measured over a predetermined time interval for detecting movement of the vehicle, detecting (E3) a movement of the vehicle when the temperature of the inflation gases of the tire increases by at least a first predetermined temperature value during the predetermined time interval for detecting movement of the vehicle, and periodically measuring (E4), at an activation frequency higher than the standby frequency, the temperature of the inflation gases of the tire when a movement of the vehicle has been detected.