US 10,502,552 B2 · Field splitter for three-dimensional strain measurement

Abstract

The present disclosure provides an apparatus and method which uses a field splitter or a beam splitter for the purpose combining two different views of a materials testing sample under materials testing into a single image. This allows for three-dimensional strain measurement in the context of material/compound testing. In particular, the time and stress dependent change in gauge length can be tracked and calculated in order to calculate the time and stress dependent strain. The method and apparatus allows imaging on a single image sensor for the three-dimensional strain calculation.

Claims12

Dependent claims

A device for strain measurement and calculation, including:

a field splitter, including first and second objectives, for receiving first and second images of a materials testing sample through the respective first and second objectives, from first and second angles and combining the first and second images into a single composite image;
a first device for receiving the single composite image and generating a single digital image;
and
a second device for receiving the single digital image and performing strain calculations with respect to the material testing sample by measuring a selected gauge length and subsequently performing a three-dimensional calculation to calculate at least one change in the selected gauge length in order to calculate strain.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/745,811Filed 25 Jul 2016 · us provisional application

Priority

27 Aug 2015

Published

US 2018/0216929 A12 Aug 2018

Granted

10 Dec 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G01B 11/16
Measuring arrangements characterised by the use of optical techniques: for measuring the deformation in a solid, e.g. optical strain gauge
G02B 27/10
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00: beam splitting or combining systems
G06T 7/0004
Inspection of images, e.g. flaw detection: industrial image inspection
G06T 7/97
Image analysis: determining parameters from multiple pictures

Field splitter for three-dimensional strain measurement

Life of this patent

Field splitter for three-dimensional strain measurement

Life of this patent

Abstract

Claims12