Abstract:This paper outlines the motivation for structural health monitoring with fiber Bragg grating (FBG) strain sensors in nuclear power plants where a high measurement resolution is normally required. Hence, a mechanical strain amplification is needed to increase the strain sensitivities. To ensure long-term stability, an epoxy-free mechanical strain amplification sensor is constructed using a Kovar encapsulated FBG. The strain response of the sensor is characterized using an extensometer. It was found that the ach… Show more
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