Non-Invasive Model Attitude and Deformation Measurement

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9101-08-C-0012
Agency Tracking Number: F061-298-3855
Amount: $749,895.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2006
Solicitation Topic Code: AF06-298
Solicitation Number: 2006.1
Small Business Information
ACUITY TECHNOLOGIES, INC.
3475 Edison Way, Bldg P, Menlo Park, CA, 94025
DUNS: 809641533
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert Clark
 President
 (650) 369-6783
 bob@acuitytx.com
Business Contact
 Robert Clark
Title: President
Phone: (650) 369-6783
Email: bob@acuitytx.com
Research Institution
N/A
Abstract
A system for high-resolution, real-time (40Hz), non-invasive wind tunnel attitude and deformation measurement is proposed. The system combines projection of structured laser light with photography of the illuminated surface. Photogrammetric techniques are used to obtain the three dimensional shape of the surface. Whereas most structured light systems employ a repeating pattern of lines, the proposed system uses a robust true 2D pattern that is maximally distinct in any small region. This approach captures all the data necessary to determine the relative 3D positions of separated objects or portions of an object with a single pattern and eliminates the need for alignment of multiple patterns projected in sequence, allowing rapid high resolution profile capture. It also facilitates capture of relative positions of separated objects by avoiding the position ambiguities introduced with repeating patterns. Shapes of rapidly moving or deforming objects are captured in a single laser flash, allowing direct measurement of transient structure strain, vibration, or motion. 3D snapshots of wind tunnel models can be acquired in either single-camera or multi-camera mode, with short exposure times, fast frame rates, and high accuracy.

* information listed above is at the time of submission.

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