Robert A Addison

US Patent:

6741237, May 25, 2004

Filed:

Aug 23, 2001

Appl. No.:

09/938095

Inventors:

David J. Benard - Newbury Park CA
Robert C. Addison - Thousand Oaks CA

Assignee:

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

International Classification:

G06K 1106

US Classification:

345173, 178 1801

Abstract:

A plurality of acoustic wave transducers are coupled to a substrate at predetermined spaced apart locations. At least one of the transducers is operative to emit an acoustic wave that propagates along the substrate, with the other transducers operating as receivers of acoustic waves. The receivers are coupled to a control system that is operative to determine a location at which the substrate is perturbed based on time associated with travel of an acoustic wave from a transmitter, to the location of the perturbation, and from the perturbation to each of the respective receivers.

US Patent:

7079118, Jul 18, 2006

Filed:

Feb 23, 2004

Appl. No.:

10/784627

Inventors:

David J. Benard - Newbury Park CA, US
Robert C. Addison - Thousand Oaks CA, US

Assignee:

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

International Classification:

G09G 5/00

US Classification:

345173, 345177

Abstract:

A plurality of acoustic wave transducers are coupled to a substrate at predetermined spaced apart locations. At least one of the transducers is operative to emit an acoustic wave that propagates along the substrate, with the other transducers operating as receivers of acoustic waves. The receivers are coupled to a control system that is operative to determine a location at which the substrate is perturbed based on time associated with travel of an acoustic wave from a transmitter, to the location of the perturbation, and from the perturbation to each of the respective receivers.