Piezoelectric triggering mechanism

Abstract

A piezoelectric triggering mechanism () includes a piezoelectric element (), such as the transducer of a SAW device, that is configured to crack or break upon being subjected to excessive levels of mechanical force or other triggering mechanisms, thus generating a burst of electromagnetic energy. The large impulse of energy can then be conditioned () through resonant circuits or antennas and modulated () with an identification pattern through appropriate structures (such as SAW electrodes) to send a breakage indication signal to a remote receiver (). Piezoelectric elements () may be integrated with a pneumatic tire structure to provide indication upon pressure loss or tire failure. Piezoelectric elements () may also be integrated with safety support features of some tire structures to provide indication of tire operation in a run-flat mode of operation. Related aspects of the present piezoelectric triggering technology employ a piezoelectric element () in a trigger detection method, which may involve detection of such occurrences as breach of security via opening of a sealed access structure or breakage of a glass panel, deployment of an airbag, loss of pressure or excess deflection in a tire, presence of smoke in a given location, and other rupture and sensor applications.