Encapsulation of fiber optic strain gauges with adhesive
new method for mounting fiber optical strain gages to structures will be proposed which is fast, easy and reliable. Mounting of the sensors happens by means of a specially designed mounting tool called a UV sensor pad. The achievable performances with four different types of adhesives (three urethane and one epoxy adhesive), and with different fibre types, are evaluated: acrylate-coated, polyimide-coated, and bare single-mode optical fibres. Experimental measurements based on the Mach–Zehnder interferometric technique were performed to validate the theoretical prediction and reveal the differential strains between the optical fiber strain sensor and test specimen.
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