Invocon, Inc.

Eric Krug

Karl F Kiefer

Brian D Philpot

Doug Heermann

Kevin Champaigne

Gulnara Ajupova

Doug Heerman

Christopher DePalm

Gulnara Roberson

Guinara Ajupova

A method and system for detecting hypervelocity impacts on a detection surface utilizes multiple sensors that directly measure electrical pulse radio frequency (RF) emissions generated by hypervelocity impacts on a detection surface and time of arrival (TOA) position measurements for determining the precise impact location on the detection surface. The detection surface material is compressed differentially in such a way that the inherent equalization of the compressed electron density in one area of the impact is directed to the uncompressed area of the material causing an electrical current that flows until the redistribution of the electrical charge has been completed and the rapid redistribution of charge and inherent current that results emits the radio frequency pulse that is induced into the detection surface.

Hypervelocity impact and time of arrival detection method and system

A hypervelocity impact detection method and system for determining the precise impact location in a detection surface, of impacts such as ballistic missile intercepts, micrometeoroids and orbital debris (MMOD) or other shock events, utilizes a gridless detection surface capable of propagating radio frequency (RF) impact detection signals responsive to receiving hypervelocity impacts from objects, and multiple sensors on the detection surface that directly measure radio frequency RF emissions generated by the hypervelocity impacts on the surface, and a time of arrival (TOA) position measurement technique for determining the precise impact location in the detection surface.

Hypervelocity impact detection method and system for determining impact location in a detection surface

A passive SAW strain sensor for remotely sensing strain within a surface has a receiving SAW correlator with a signal input interdigitated transducer and a plurality of adjacent successive spaced interdigitated output transducers on a piezoelectric substrate, and a transmitting SAW correlator having a plurality of adjacent successive spaced interdigitated output transducers and a signal output interdigitated transducer on a piezoelectric substrate. The transmitting SAW correlator is affixed to or embedded in the surface such that its substrate will be stressed when the surface is strained and the receiving SAW correlator is not affixed to or embedded in the surface. The output transducers of the receiving SAW correlator and the transmitting SAW correlator are spatially placed to define a unique frequency of sensitivity, and their outputs are coupled together. A complex RF waveform signal applied to the receiving SAW correlator is transformed into an acoustic wave having a distinct output pulse that supplies power to the output transducers of the transmitting SAW correlator which is transformed into a complex RF output waveform. The application of stress on the transmitting SAW correlator shifts its center frequency proportionally and changes the frequency of the complex RF output waveform, and measurement of the center frequency change yields an indication of the applied stress.

Encoded surface acoustic wave based strain sensor

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Conroe, TX, United States of America

Eric Krug