| 摘要 |
A method for locating the wheels of a vehicle equipped with an electronic module, according to which the transmission, by transmitting antennas mounted on the vehicle, of a predetermined number of identification request signals is commanded, and the values representative of the rates of reception of these signals by the electronic modules are analyzed. According to the method, centroid calculations are performed to determine, for each wheel position, the “ideal position” {right arrow over (LAj)} for reception of the transmitting antennas covering the wheel position (a reception rate of 100%), and, for each electronic module, the “actual position” of the latter {right arrow over (WUi)} relative to the position {right arrow over (TAi)} of the transmitting antennas fitted to the vehicle, using as the criterion for determining this “actual position” {right arrow over (WUi)} the rate of reception, by the electronic module, of the signals transmitted by each transmitting antenna. |
| 主权项 |
1. A method of locating the positions of wheels (2-5) of a vehicle (1) equipped with an electronic module (6-9) adapted to transmit to a central unit (11), mounted on the vehicle (1), signals comprising data representative of operating parameters of each wheel (2-5) and an identification code of said electronic module, said location method comprising:
equipping the vehicle (1) with NTA transmitting antennas (13-15) positioned in such a way that the coverage area (A1-A3) of each transmitting antenna (13-15) covers at least one wheel position, and that the total coverage area of all the transmitting antennas (13-15) covers all the wheel positions (2-5), successively commanding the transmission of a predetermined number of identification request signals by each transmitting antenna (13-15), calculating values which are representative, for each electronic module (6-9), of the rate of reception Ti by the module of the signals transmitted by each of the transmitting antennas (13-15), and executing a location procedure which is adapted, by analysis of the values representative of the reception rates Ti, to enable a wheel position to be assigned to each electronic module (6-9),said location method being characterized in that:
in a preliminary step, a predetermined geometric reference frame (CT) is defined, and the following are defined within this reference frame: the coordinates {right arrow over (TAi)} of each transmitting antenna (13-15), for each wheel position, the coordinates of the centroid {right arrow over (LAj)}, called the reference centroid, of the transmitting antennas (13-15) whose coverage area (A1-A3) covers said wheel position, to each of which is assigned a weighting coefficient wi in the form of a value representative of a 100% rate of reception Ti of the signals transmitted by said transmitting antenna, the following location procedures are executed: defining, for each electronic module (6-9), the coordinates of the centroid {right arrow over (WUi)} of the NTA transmitting antennas, to each of which is assigned a weighting coefficient wi in the form of a value representative of the rate of reception Ti, by said electronic module, of the signals transmitted by said transmitting antenna, and determining, on the basis of the relative position between the reference centroids {right arrow over (LAj)} and each of the centroids {right arrow over (WUi)}, representative of an electronic module (6-9), the wheel position to be assigned to each of said electronic modules. |
