Accession Number:

ADA200397

Title:

Non Contacting Evaluation of Strains and Cracking Using Optical and Infrared Imaging Techniques

Descriptive Note:

Final rept. 1 Sep 1986-1 Jun 1988

Corporate Author:

MICHIGAN UNIV ANN ARBOR DEPT OF CIVIL ENGINEERING

Personal Author(s):

Report Date:

1988-08-22

Pagination or Media Count:

17.0

Abstract:

This grant was issued under the DOD University Research Instrumentation Program. Two new test systems were purchased and set-up a thermovision system and a non contacting three dimensional motion measuring system. The first system consists of an infrared scanner supported by a video recorder, a thermal image computer, corresponding software and other peripherals. It is being used as a non-contact non-destructive technique to analyse the mechanical response of and crack initiation in concrete under specified loading. The second system is a high accuracy three dimensional motion tracking, digitizing and analysis system. It essentially consists of two high resolution infrared dual axis sensors cameras, a camera controller unit, a microcomputer, a data acquisition unit, and related software. This system can track the coordinates of up to 64 individual marker points placed on a test specimen with a frequency of 5000 hertz at accuracies of a fraction of a millimeter.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Test Facilities, Equipment and Methods
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE