Self-powered switching device

Details Self-powered switching device Self-powered switching device

H - Electricity

01

H

H01H 47/00 (2006.01) H01L 41/107 (2006.01) H05B 41/282 (2006.01)

Patent

CA 2416074

A self-powered switching device using a prestressed flextensional electrocative member (12) generates a signal for activation of a latching relay (90). The electroactive member (12) has a piezoelectric element with a concave face that may be compressed to generate an electrical pulse. The flextensional electroactive member (12) and associated signal generation circuitry (10) can be hardwired directly to the latching relay (90) or may be coupled to a transmitter (60) for sending an RF signal to a receiver (70) which actuates the latching relay (90).

La présente invention concerne un dispositif de commutation d'auto-alimentation utilisant un élément électroactif précontraint s'infléchissant sous l'effet d'une tension (12), et qui produit un signal pour activer un relais à verrouillage (90). L'élément électroactif (12) comporte un élément piézo-électrique à face concave pouvant être compressé pour produire une impulsion électrique. Par ailleurs, on peut directement câbler l'élément électroactif (12) et les éléments du circuits d'émission de signaux associé (10) au relais à verrouillage (90) ou les coupler à un émetteur (60) pour envoyer un signal RF à un récepteur (70) qui actionne le relais à verrouillage (90).

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