Method of transmitting radio signals between an electronic unit of a wheel and a central electronic control unit attached to a vehicle

Abstract

The invention relates to a method for transmitting radio signals between a mobile electronic unit (5) of a vehicle wheel (1) and a central electronic control unit fixed to the vehicle, comprising the steps of: defining an angular reference point (Rref) of the wheel , which is fixed relative to the wheel; the angular reference point (Rref) is used to define the division of one revolution of said wheel into successive basic segments (S1‑S8), and between the wheel electronics unit and the fixed central electronic control unit transmitting a plurality of consecutive radio signals such that each signal is transmitted at a predetermined angular position of the wheel, the position being calculated based on the angular reference point and based on the segmenting of the wheel; calculating the angular rotational speed of the wheel; determining the minimum segment of wheel rotation necessary for signal transmission between the wheel electronics unit and the central electronic control unit at the calculated angular rotational speed; determining the first signal and the second following the first signal based on the angular reference point Transmission angular offset between the signals, which is equal to the minimum multiple of the basic division segment (S1‑S8) covering the time necessary to transmit 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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