Patent ID: 9121785
Filing Date: 2015-09-01
Classification: A42B,G01L,G01M

Abstract:
1. A non-powered impact recorder, comprising: a plurality of resonators, each resonator tuned for a resonant response within a predetermined frequency range, a reduced cross-sectional area portion formed within each of the plurality of resonators, each resonator configured to structurally fail when the resonator experiences the resonant response at a predetermined amplitude, wherein at least two of the plurality of resonators are tuned for a resonant response within the same predetermined frequency range, the reduced cross-sectional area portions of each of the at least two resonators being configured to structurally fail at different amplitudes; and an electric circuit element disposed about the reduced cross-sectional area portion of each resonator, wherein upon structural failure of the resonator, the electric circuit element is broken to cause a discontinuity in the electric circuit element, and wherein interrogation of the discontinuous electric circuit element facilitates approximation of at least one of an impact frequency and an impact energy.