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Opto-electronic tensile testing system

  • US 4,112,746 A
  • Filed: 03/29/1977
  • Issued: 09/12/1978
  • Est. Priority Date: 04/02/1976
  • Status: Expired due to Term
First Claim
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1. A tensile testing system for opto-electronically indicating the stress-strain properties of materials under tension comprising, in combination, scanning means for scanning a test specimen made of a material being tensile tested and a test region of the test specimen subjected to elongation by pulling stresses during tensile testing and for detecting and converting to an electrical output signal an optical characteristic of the test region different from other optical characteristics of other surfaces of the test specimen and developing said output signal as elongation of the test region progresses, circuit means receptive of said output signal for deriving therefrom portions thereof representative of the increasing length of the test region during elongation thereof and said scanning means comprising an area scanner developing a two-dimensional scene including the test specimen.

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