Patent ID: 6130627
Filing Date: 2000-10-10
Classification: G08G

Abstract:
An impact sensing element comprising first unpolarized, untreated insulated elongated dielectric (6) of non-electret based material, a first elongated conductive member (2), a second unpolarized, untreated insulated elongated dielectric of non-electret based material adjacent said first dielectric and a second conductive member (4) adjacent said second dielectric, said impact sensing element being characterized in that at least one of said dielectrics (6, 8) has a naturally occurring first residual charge adapted to gravitate toward an interface, said interface being disposed between a surface of one of the conductive members (2, 4) and said first dielectric (6, 8) having the naturally occurring first residual charge to thereby cause an interfacial polarization and a uniform static electric field to be generated between the conductive members, at least one of said conductive members (2, 4) being disposed for movement in said uniform static electric field to thereby cause a disturbance of said uniform static electric field and a signal pulse to be generated in response to movement of said at least one of said conductive members (2, 4) and disturbance of said uniform static electric field.