System and method for optical measuring of tire adhesion and tire suitable for such measurement

摘要

A system for measuring the grip between a vehicle wheel tire and a road surface comprising a fiber optic (19) provided with FBG sensors (21) affixed to the internal surface of the tire, which record data regarding the state of state of residual grip Grs of the tire to the road. The fiber optic (19) has an end part (20) which, through an optical joint (5, 6) transmits the data to an instrumentation of the vehicle, making it pass through a spectrum analyzer (12), a data processing system (14), which implements the residual grip identification algorithm Grs. The residual grip information is sent to a display that is visible by the driver and/or to active control systems for driving the vehicle.

主权项

1. A system for measuring a grip between a tire mounted on a vehicle and a road surface, wherein the tire is mounted on a rim, wherein the rim is coupled to a perforated axle for rotation therewith, and wherein the tire has a rubber exterior and an interior containing compressed air, wherein the system comprises:
one or more optical fibers provided with FBG sensors secured within the rubber or fixed to an internal surface of the tire, and adapted to record data regarding the state of the tire, and associated with different reflected wavelength λ, said one or more optical fibers having an end part which emerges from the tire and extends through the perforated axle, terminating in a first lens, such that said tire, rim, axle and first lens rotate together when the tire rotates, an optical joint to transmit the data to an instrumentation within the vehicle, the optical joint including the first lens and a second lens which is not rotatable relative to the vehicle and which is positioned to communicate with the first lens, a spectrum analyzer to receive data transmitted through the optical joint from the FGB sensors, which data is sent to a data processing device, adapted to implement a residual grip identification algorithm and to send information regarding the residual grip to a device indicating the state of the tire available for a user of the vehicle and/or to active control systems for controlling the vehicle.