One-Sided 3D Imaging of Non-Uniformities in Non-Metallic Space Flight Materials

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$600,000.00
Award Year:
2011
Program:
STTR
Phase:
Phase II
Contract:
NNX11CC67C
Award Id:
n/a
Agency Tracking Number:
090069
Solicitation Year:
2009
Solicitation Topic Code:
T7.01
Solicitation Number:
n/a
Small Business Information
MI, Ann Arbor, MI, 48104-6765
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
788133387
Principal Investigator:
David Zimdars
Principal Investigator
(734) 864-5639
dzimdars@picometrix.com
Business Contact:
Marsha Gilbert
Business Official
(734) 734-5611
mgilbert@picometrix.com
Research Institute:
The Regents of the University of Michigan
Elaine Brock
3003 South State Street, Room 1072
Ann Arbor, MI, 48109-1274
() -
Nonprofit college or university
Abstract
In this Phase II project, we propose to develop, construct, and deliver to NASA a prototype single-sided computed tomography time-domain terahertz (single-sided CT TD-THz) scanner accessory. This accessory will be suitable to be mounted onto a non-destructive evaluation (NDE) imaging gantry for the single-sided inspection of spacecraft and launch vehicle composite structures. The single-sided CT TD-THz scanner will be an accessory which works with existing T-Ray 4000<SUP>REG</SUP> TD-THz NDE imaging instruments owned by NASA (and other aerospace firms). We will also develop, and deliver a software package which employs the model-based image reconstruction (MBIR) methods. The MBIR method allows the reconstruction of 2D slices in depth from the data acquired by the single-sided CT TD-THz scanner. These 2D slices can then be stacked laterally to generate 3D images of sub-surface structures, features and defects. Time-domain terahertz imaging in the 0.1 to 3 THz spectral range is currently being used to characterize defects in Space Shuttle insulation and related materials. The proposed project will largely be configured from standard Picometrix THz sub-components, but incorporate measurements of the scattered THz fields, enabling full 3D reflection-mode reconstruction of non-metallic materials where only one side is accessible.

* information listed above is at the time of submission.

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