Patent ID: 6917285

Claim:
A device for detecting sudden and significant loss of tire pressure, comprising: piezoelectric pressure variation detector which responds in a safety time interval to a significant and rapid variation in the pressure inside the cavity of a tire, and which acts on a management module, cooperating with said detector, said pressure variation detector comprising a casing provided with two chambers, insulated from one another and separated by a piezoelectric deformable membrane, a first chamber being subject to a reference pressure and a second chamber being in fluid communication with an environment of a medium in which it is desired to effect monitoring, said deformable membrane adopting a given stable profile in an absence of variation in pressure differential between the two chambers, said membrane being adapted to deform so as to pass from a first profile to a second profile under an action of variation in the pressure of said environment, and deformations thus produced allowing for generation of an electrical signal, the strength of which is related to the degree of deformation; a management module, cooperating with said detector and capable, on a basis of information supplied by said detector, of sending a signal when a given pressure variation threshold is reached.