Resonant piezoelectric alerting device

摘要

A resonant piezoelectric alerting device (400) includes a motional mass (130) and a piezoelectric actuator (100) which is constrained to an actuator mount (132) at a first end and coupled to the motional mass (130) at a second end, the piezoelectric actuator and the motional mass in combination producing a resonant system having a predetermined frequency of operation. The piezoelectric actuator 9100) is responsive to a control signal (108, 110) generated at the predetermined frequency generates an alternating out-of-plane movement(812, 814) of said motional mass (130) which is transformed into tacile energy to provide a tactile alert about the resonant frequency (608). The out-of-plane movement (812, 814) of the motional mass (130) is also transformed into acoustic energy to provide an audible alert in response to a control signal generated above the predetermined frequency (608).