Glass breakage detectors employing piezoresistive devices

摘要

A glass breakage detector includes a cantilever assembly incorporating a base member having a first beam coupled thereto. The base assembly is secured to a pane of glass with the beam extending along an axis determined by the plane contaning the glass. A piezoresistive device is positioned on the beam and adapted to change its resistance upon deflection of the beam due to the breakage of said glass and based upon the application of a vector component of force as deflecting the beam. Other embodiments employ at least another cantilever assembly also having a beam and sensor with the beam directed relatively transverse to the first beam and adapted to respond to force components normal to said vector component.