Patent ID: 7000462

Claim:
A system for monitoring a vehicle with pneumatic tires, comprising: a pressure sensor disposed to sense a tire inflation pressure of at least one wheel of the vehicle and to output a sensor output signal; a deformation sensor for sensing deformations of a tire, joined to a sidewall of the tire at a location that is subject to strong deformation when a pneumatic pressure in the tire is too low in relation to a weight of the vehicle, said deformation sensor generating an output signal in dependence on the deformation of the sidewall; an analysis unit; a data transmission device for transmitting the sensor output signal of said pressure sensor and the output signal of said deformation sensor to said analysis unit; said analysis unit including a filtering device configured to subject the output signal from said deformation sensor to low-frequency filtering in dependence on a speed of rotation of the wheel, to generate a signal substantially corresponding to a quasi-static tire deformation, and to high-frequency filtering in dependence on the speed of rotation of the wheel, to generate a signal characterizing a nature of a road surface.