Method for transmitting a radio signal between an electronic unit of a vehicle wheel and an electronic centralized control unit attached to the vehicle

Abstract

The present invention relates to a method for transmitting a radio signal between an electronic unit (5) of a mobile vehicle wheel (1) and an electronic centralized control unit attached to the vehicle, comprising the following steps: defining an angular reference point (Rref) of the wheel, said reference point being stationary relative to the wheel; defining a division of a turn of the wheel into basic consecutive sectors (S1-S8) starting from the angular reference point (Rref), and transmitting a plurality of consecutive radio signals between the electronic wheel unit and the stationary electronic centralized control unit, such that each of the signals is transmitted at a predetermined angular position of the wheel, said position being calculated from the angular reference point and the division of the wheel into sectors; calculating the angular rotational speed of the wheel; determining a minimum rotational sector of the wheel that is required when a signal is being transmitted between the electronic wheel unit and the electronic centralized control unit, at the calculated angular rotational speed of the wheel; determining, from the angular reference point, an angular transmission offset between a first signal and a second signal which follows the first signal, as being the same as the smallest multiple of the basic divisional sector (S1-S8) that covers the time required for transmitting the first radio signal at the calculated angular rotational speed.

Description

technical field [0001] The invention relates to a method of transmitting radio signals between a mobile wheel electronic unit of a vehicle and a stationary central electronic control unit ("ECU" in English) of said vehicle. Background technique [0002] At present, the wheel electronic unit has the function of informing the central electronic control unit of various parameters related to the wheel, such as tire pressure, gas temperature inside the tire, or wheel temperature, as well as the ground footprint of the tire, such as this footprint on the wheel length in the plane. These wheel electronics units are usually fitted to each wheel of the vehicle and are fixed inside the tire against its tread and are equipped to detect the moment the tread touches the ground and the moment the tread leaves the ground based on the radial displacement of the tread caused Components of the moment of the ground. These components are, for example, accelerometers or crash sensors or the li...

AI Technical Summary

Problems solved by technology

[0010] However, a vehicle without a shaded area and in which the acceptance rate reaches 100% is not representative of the actual situation

This explains the redundancy in the protocol, such as the use of three consecutive signals in each series of signals sent in order to ensure the statistical transmission of information messages between the wheel electronics unit and the central electronic control unit, thus resulting in an even lower energy efficiency

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