University of Illinois

Holger Falter Mechanische Erfindungen

Debra Laefer

Susan Carol Hagness

Jennifer T Bernhard

Gregory Hilding Huff

Seyit Ceribasi

Carol Ann O'SULLIVAN

Yann Pierre Joseph Morvan

Hamish Carr

Linh Hong Truong

Tommy Hinks

One embodiment of the present invention provides several electromagnetic radiation reflectors within a volume that contains solid portions subject to movement relative to one another. At least a portion of the reflectors are positioned beneath one or more of the solid portions and move in response to movement of at least some of the solid portions. The volume is irradiated with electromagnetic radiation having one or more frequencies in a range from one kHz through one THz, and a reflection is detected of at least a portion of the electromagnetic radiation from each of the reflectors in response to this irradiation. Movement among the solid objects is evaluated from the reflection of each of the reflectors, which includes determining a spatial orientation of each one of the reflectors as a function of at least one of polarization selectivity and frequency selectivity.

Material movement sensing techniques

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Dublin, Ireland

Debra Laefer