Abstract: 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.

Abstract: A system for measuring the grip between a vehicle wheel tyre and a road surface comprising a fibre optic (19) provided with FBG sensors (21) affixed to the internal surface of the tyre, which record data regarding the state of state of residual grip Grs of the tyre to the road. The fibre 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 analyser (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.

Abstract: The invention concerns a method for producing a microporous film with strong isotropic tendency permeable to gases and impermeable to aqueous liquids, consisting of at least one layer, comprising the following successive steps: preparing a mixture consisting of a polyolefin matrix containing at least a polymer and at least a mineral and/or organic filler; extruding at least a ply by hot-casting the mixture; pre-stretching the ply with a drag roll; cooling and solidifying the pre-stretched ply, using the drag roll; drawing the solidified ply at sufficient temperature for forming the microporous film.