Tire blow-out detector
View Patent ↗A device for detecting substantially sudden and significant loss of pressure in a tire, comprising: a pressure variation detector capable on the one hand of responding in a safety time interval to a substantially significant and rapid variation in the pressure inside the tire cavity, and on the other hand of acting on another element cooperating with said detector; a management module, cooperating with said detector and capable, on the basis of the information supplied by said detector, of sending a signal when a given pressure variation threshold is reached.
1. 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.
2. A device for detecting sudden and significant loss of tire pressure according to claim 1 , in which the reference pressure corresponds to a vacuum.
3. A blow-out detection device according to claim 1 , in which the environment of the medium in which it is desired to effect monitoring corresponds to the pressure inside the cavity of a tire.
4. A device for detecting sudden and significant loss of tire pressure according to claim 1 , in which the piezoelectric membrane comprises two metallized faces.
5. A device for detecting sudden and significant loss of tire pressure according to claim 1 , in which the management module emits a signal which actuates a warning means for a driver of a vehicle, to which the said tire is attached.
6. A device for detecting sudden and significant loss of tire pressure according to claim 1 , in which the management module emits a signal which serves as a parameter for a vehicle driver assistance device.
7. A device for detecting sudden and significant loss of tire pressure according to claim 6 , in which said assistance device utilizes ESP technology.
8. A device for detecting sudden and significant loss of tire pressure according to claim 6 , in which said assistance device utilizes antilock brake system (ABS) technology.
9. A device for detecting sudden and significant loss of tire pressure according to claim 6 , in which said assistance device utilizes antiskid technology.
10. A tire comprising a blow-out detection device according to any one of claims 1 to 9 .
11. A tire according to claim 10 , in which the blow-out detection device is moulded in a wall in the tire.
12. A rim comprising a blow-out detection device according to any one of claims 1 to 9 .
13. A device for monitoring the pressure of at least one tire, comprising a pressure sensor, and a device for detecting a sudden and significant loss of tire pressure according to any one of claims 1 to 9 .