Abstract: A piezoelectric device comprises at least one piezoelectric layer P interposed between two conductive layers E, each layer E forming an electrode, characterized in that the layer P comprises at least one piezoelectric composition based on at least one elastomer matrix comprising predominantly at least one diene elastomer, a piezoelectric inorganic filler, a carbon black and a crosslinking system, and in that the content of piezoelectric inorganic filler is greater than or equal to 5% by volume, relative to the total volume of the piezoelectric composition, and the content of carbon black is greater than or equal to 6% by volume, relative to the total volume of the piezoelectric composition. A tire comprising at least one piezoelectric device defined above is also set forth.

Abstract: A piezoelectric composite material is based on a polymeric matrix and on piezoelectric inorganic fillers, characterized in that the material additionally comprises at least one ionic liquid of general formula Q+ A?, in which Q+ represents a cation chosen from quaternary ammonium cations and quaternary phosphonium cations and A? represents any anion capable of forming a liquid salt at a temperature of less than 100° C. A device comprising at least one layer based at least one piezoelectric composite material defined above and at least two electrodes positioned on either side of the layer and a tire comprising at least one piezoelectric device defined above are also set forth.

Abstract: A piezoelectric device comprises at least one piezoelectric composite layer P inserted between two conductive composite layers E, each layer E forming an electrode, characterized in that: the layer P is a rubber composition containing more than 50 parts by weight per hundred parts by weight rubber, phr, of diene elastomer, a cross-linking system and at least 5 vol. %, in relation to the total volume of the rubber composition, of piezoelectric inorganic charges; and each layer E is a rubber composition containing at least 50 phr of diene elastomer, a cross-linking system, and conductive charges. A method for producing the device and a tire comprising the device are also disclosed.

Abstract: A tire (1) for a vehicle comprises two sidewalls (3) and a crown (2) that is connected to the two sidewalls (3). The tire (1) comprises at least one insert (11, 12) which includes force detection means and which extends in a limited manner along one of the sidewalls (3) or the crown (2).