Chiara Daraio

8191401, Jun 5, 2012

Feb 3, 2009

12/364947

Chiara Daraio - Pasadena CA, US

California Institute of Technology - Pasadena CA

G01M 7/08
G01M 3/34
G01N 33/38
G01N 3/303

73 1211, 73 1213

A method and system supporting the formation and propagation of tunable highly nonlinear pulses using granular chains composed of non-spherical granular systems. Such a method and system may be used to support the creation of tunable acoustic band gaps in granular crystals formed of particles with different geometries (spherical or not) in which the tunability is achieved by varying the static precompression, type of excitation and/or pulse amplitude in the system.

8327709, Dec 11, 2012

Oct 14, 2008

12/251164

Chiara Daraio - Pasadena CA, US
Piervincenzo Rizzo - Pittsburgh PA, US

University of Pittsburgh - Pittsburgh PA
California Institute of Technology - Pasadena CA

G01N 29/06
G01N 29/24

73632, 73642

A method and apparatus for nondestructive evaluation (NDE) of structures and materials using a highly nonlinear medium for the generation and detection of one or multiple highly nonlinear pulses (or highly nonlinear waves) impinging on a material or structure. The apparatus includes pulse exciters that induce the propagation of highly nonlinear, weakly nonlinear or linear stress waves in the material, system, or structure to be inspected and/or detectors for the observation and the detection of the output waves from the material/structure being tested. The NDE method includes the use of the tunable highly nonlinear apparatus as impulse exciter alone, or in combination with an accelerometer or a nonlinear sensor to detect the outgoing pulse.

8397549, Mar 19, 2013

Mar 29, 2012

13/434821

Chiara Daraio - Pasadena CA, US

California Institute of Technology - Pasadena CA

G01M 7/08
G01M 3/34
G01N 33/38
G01N 3/303

73 1211, 73 1213

A system supporting the formation and propagation of tunable highly nonlinear pulses using granular chains composed of non-spherical granular systems. Such a system may be used to support the creation of tunable acoustic band gaps in granular crystals formed of particles with different geometries (spherical or not) in which the tunability is achieved by varying the static precompression, type of excitation and/or pulse amplitude in the system.

20090199643, Aug 13, 2009

Feb 3, 2009

12/364974

Damien EGGENSPIELER - Paris, FR
Devvrath KHATRI - Pasadena CA, US
Chiara DARAIO - Pasadena CA, US

G01N 29/11

73600

A method and system for creating highly nonlinear solitary waves for use in performing nondestructive evaluation of structures and materials. The method and system use an apparatus having a spring loaded adjustable striker, a chain of granular particles, and a reloading device that allows for repeated activation of the adjustable striker.

20110209940, Sep 1, 2011

Feb 25, 2011

13/035681

Chiara DARAIO - Pasadena CA, US

G08B 3/02

181139

Systems and methods for creating sound bullets are described. Such sound bullets are created by controlling and/or redirecting highly nonlinear acoustic waves or pulses propagating through an array of actuators. The controlling and/or redirecting of the acoustic waves or pulses is achieved though methods such as applying pre-compressive forces to the array of actuators or by selection of size, shape and/or material of the actuators.

20130033339, Feb 7, 2013

Jul 18, 2012

13/552042

Nicholas BOECHLER - CULPEPER VA, US
Georgios THEOCHARIS - LE MANS, FR
Chiara DARAIO - PASADENA CA, US

H03H 9/54

333187

A tunable frequency acoustic rectifier that is a granular crystal composed of a statically compressed one-dimensional array of particles in contact, containing a light mass defect near a boundary. The tunable frequency acoustic rectifier is nonlinear and contains tunable pass and stop bands in their dispersion relation. Vibrations at selected frequencies applied to the granular crystal from the side near the defect will cause the system to bifurcate at a critical input amplitude and subsequently jump to quasiperiodic and chaotic states with broadband frequency content. Some of this frequency content lies within the pass bands and will propagate through the crystal. Vibrations at the same frequencies applied to the other side of the granular crystal will not bifurcate, and little energy is transmitted.

20130187094, Jul 25, 2013

Feb 13, 2013

13/766724

CALIFORNIA INSTITUTE OF TECHNOLOGY - Pasadena CA, US
Chiara DARAIO - Pasadena CA, US

CALIFORNIA INSTITUTE OF TECHNOLOGY - Pasadena CA

C09K 3/00

2524081

Granular crystals with one or more chains of particles are described. A geometry of at least one particle is chosen to provide highly nonlinear pulses having selected characteristics. Contact interactions between the particles are non-Hertzian.

20130301113, Nov 14, 2013

Apr 17, 2013

13/865179

Keith D. Patterson - Los Angeles CA, US
Chiara Daraio - Pasadena CA, US
Eleftherios Gdoutos - Pasadena CA, US
Namiko Yamamoto - Pasadena CA, US
Risaku Toda - Pasadena CA, US
Victor E. White - Altadena CA, US
Harish Manohara - Arcadia CA, US
John B. Steeves - Pasadena CA, US

G02B 26/08

359298, 427100

A deformable mirror is configured to be deformed by surface-parallel actuation. In one embodiment, the deformable mirror includes a first piezoelectric active layer on a first surface of a substrate. The first piezoelectric active layer has a substantially uniform thickness across the first surface of the substrate. The mirror also includes a first electrode layer on the first piezoelectric active layer. The first electrode layer has a plurality of electrodes arranged in a first pattern and has a substantially uniform thickness across the first piezoelectric active layer. The mirror may further include a second piezoelectric layer on the first electrode layer, and a second electrode layer on the second piezoelectric layer. The electrodes of the first and second electrode layers are configured to supply a voltage to the piezoelectric active layers upon actuation to thereby locally deform the shape of the mirror to correct for optical aberrations.