Abstract: A method for acquiring the value of a voltage drop of a power supply battery of a sensor of a tire pressure monitoring system. The sensor includes an ultra-high-frequency two-way communicator. The method includes the steps of: acquiring the load voltage of the battery when the sensor transmits data; computing the voltage drop based on the load voltage; and transmitting the voltage drop. Also disclosed is a sensor for a tire pressure monitoring system.

Abstract: A method for protecting the battery of a wheel unit fitted to a wheel of a motor vehicle. The motor vehicle includes a central processing unit and the wheel unit includes at least a first sensor capable of measuring and of supplying an operating parameter of the wheel unit and a battery which supplies the wheel unit with power. The method including that the wheel unit transitions from an operational state to a non-operational state when the operating parameter reaches a predetermined upper threshold, and the wheel unit transitions from the non-operational state to the operational state when the operating parameter reaches a predetermined lower threshold.

Abstract: A method for deactivating a remote automatic parking mode of a vehicle in a parking garage. The vehicle being equipped with a tire monitoring system, including wheel units mounted in each wheel of the vehicle and each being provided with an accelerometer measuring a radial component of an acceleration of the wheel and being dependent on a terrestrial gravitational field. The vehicle being provided with an automatic parking mode remotely controlled by portable equipment carried by a user. The method includes, if the conditions for activating the measurements of the wheel units are verified: each wheel unit measuring acceleration values over time; comparing said values with a threshold value, for each wheel unit; if the acceleration values of at least two wheel units exceed said threshold value, then: detecting any movement of said vehicle in a parking garage; and deactivating the remote automatic parking mode.

Abstract: A method for the secure transmission of messages in real time between a transmitter and a receiver that are housed on board a motor vehicle. The method includes at least a first step that is executed during a current driving cycle of the motor vehicle and consists in the receiver comparing a received first transmitter authentication code with a first receiver authentication code. The first message being rejected if the first transmitter authentication code differs from the first receiver authentication code, and the first message being accepted if the first transmitter authentication code is identical to the first receiver authentication code.

Abstract: A method for monitoring the balancing of the wheels of a motor vehicle, comprising at least a phase of modeling a first sinusoidal theoretical acceleration signal of a first wheel and a second sinusoidal theoretical acceleration signal of a second wheel, a noise-measuring phase including, for the first wheel, calculating the difference between the value of each sample of the first raw acceleration signal and a corresponding theoretical value of the first theoretical acceleration signal, then measuring a first standard deviation for the calculated differences, and, for the second wheel, calculating the difference between the value of each sample of the second raw acceleration signal and a corresponding theoretical value of the second theoretical acceleration signal, then measuring a second standard deviation for the calculated differences, a first step of calculating reference averages including calculating a first reference average of the first standard deviations and a second reference average of the second

Abstract: A method for protecting the battery of a wheel unit fitted to a wheel of a motor vehicle. The motor vehicle includes a central processing unit and the wheel unit includes at least a first sensor capable of measuring and of supplying an operating parameter of the wheel unit and a battery which supplies the wheel unit with power. The method including that the wheel unit transitions from an operational state to a non-operational state when the operating parameter reaches a predetermined upper threshold, and the wheel unit transitions from the non-operational state to the operational state when the operating parameter reaches a predetermined lower threshold.

Abstract: A method for preventing the unintentional resetting of a wheel unit suitable for being mounted on a wheel of a motor vehicle, which wheel unit operates according to a plurality of distinct operating modes and includes a non-volatile memory, at least one update step that aims to update and store in the memory at least one variable for identifying the operating mode to be applied in the event of a reset, and a restoration step that is performed in the event of a reset of the wheel unit and forces the wheel unit to transition to the operating mode associated with the at least one identification variable stored during the preceding update step.

Abstract: A method for preventing the unintentional resetting of a wheel unit suitable for being mounted on a wheel of a motor vehicle, which wheel unit operates according to a plurality of distinct operating modes and includes a non-volatile memory, at least one update step that aims to update and store in the memory at least one variable for identifying the operating mode to be applied in the event of a reset, and a restoration step that is performed in the event of a reset of the wheel unit and forces the wheel unit to transition to the operating mode associated with the at least one identification variable stored during the preceding update step.

Abstract: A method for signaling the theft of a wheel of a motor vehicle. The vehicle includes a plurality of wheels and a computer. At least one of the wheels includes a sensor. The method includes, for the at least one wheel, the steps of measuring at least one value for the internal pressure of the tire of the wheel, detecting that the vehicle has been raised if the absolute value of the difference between the at least one measured internal pressure value and a predetermined reference internal pressure value is greater than a predetermined pressure difference threshold when it is detected the vehicle has been raised, detecting the detachment of the wheel when it is detected that the wheel has become detached, and signaling the theft of the wheel.

Abstract: A method for signaling the theft of a wheel of a motor vehicle. The vehicle includes a plurality of wheels and a computer. At least one of the wheels includes a sensor. The method includes, for the at least one wheel, the steps of measuring at least one value for the internal pressure of the tire of the wheel, detecting that the vehicle has been raised if the absolute value of the difference between the at least one measured internal pressure value and a predetermined reference internal pressure value is greater than a predetermined pressure difference threshold when it is detected the vehicle has been raised, detecting the detachment of the wheel when it is detected that the wheel has become detached, and signaling the theft of the wheel.

Abstract: A method for the secure transmission of messages in real time between a transmitter and a receiver that are housed on board a motor vehicle. The method includes at least a first step that is executed during a current driving cycle of the motor vehicle and consists in the receiver comparing a received first transmitter authentication code with a first receiver authentication code. The first message being rejected if the first transmitter authentication code differs from the first receiver authentication code, and the first message being accepted if the first transmitter authentication code is identical to the first receiver authentication code.