Kai Tai Wan

TL;DR: In this paper, different kinds of sensing techniques, including change of light intensity, interferometry, fiber Bragg grating, adsorption measurement and distributed sensing, are briefly reviewed to introduce the basic sensing principles.

TL;DR: In this paper, a 3D-FEM is established to model the strain transfer of a surface-mounted strain sensor and it is verified by experiments, which is used to investigate the influence of four geometric parameters of the adhesive: (1) side width, (2) top thickness, (3) bond length, (4) bottom thickness, by sensitivity analysis, it is revealed that the bond length and the bottom thickness are dominant factors.

TL;DR: In this paper, a low-cost sensor for steel corrosion was developed based on a simple physical principle, where the flat end of a cut optical fiber is coated with an iron thin film using the ion sputtering technique.

TL;DR: In this article, a distributed optical crack sensor based on OTDR measurement of bend loss has been developed to detect and monitor cracking in concrete structures, where the crack locations are often not known in a-priori.

TL;DR: In this paper, a distributed fiber optic sensor has been developed for the detection and monitoring of purely opening cracks (or Mode I cracks) based on the bending loss of an optical fiber intersecting the opening crack at an angle other than 90°.