Patent ID: 8628023
Filing Date: 2014-01-14
Classification: G01B,G01L,G06K

Abstract:
1. An object for which at least one of strain and fatigue damage is to be measured and having a target associated therewith on a surface thereof or embedded therein, the target incorporating an augmented binary code symbol for non-linear strain measurement and perimeter-based deformation and strain analysis, the augmented binary code symbol emitting a detectable physical quantity and including: a solid, continuous, rectangular outer perimeter; first and second data regions along adjacent sides of the outer perimeter, each data region comprising at least one row of a plurality of data cells, each data cell representing a single bit of binary data; first and second utility regions along adjacent sides of the outer perimeter opposite the first and second data regions, each utility region comprising at least one row of a plurality of utility cells of alternating appearance, wherein the utility cells encode data in the first and second utility regions; first and second finder cells at opposite corners of the rectangle; and inner and outer quiet regions distinguishing the first and second data regions, the first and second utility regions, and the first and second finder cells from their background; wherein the data cells and the utility cells have edges that are well-defined to enable reduction of the size of the data cells and preservation of the quality of edges of the data cells of reduced size when an image of the augmented binary code symbol is magnified; and wherein the data encoded in the utility cells identifies the augmented binary code symbol.