Abstract
Fast and accurate deformation measuring techniques have promising potential for monitoring of high-temperature piping in the energy sector, such as thermal, stream, or nuclear power plant. In this study, a dynamic thermal deformation measurement technique utilizing the sampling moire method is developed for large-scale high temperature piping in the thermal power plant. To endure the high temperature nearly 300℃ of the piping, several ferrite magnets with 100×100 mm is used to attach to the interwsted locations of the piping. In each ferrite magnet, a regularly two-dimensional binary grating patterrn with 15 mm pitch was sprayed onto the surface, and the magnetic grating was used as the reference grating to analyze the displacement distribution the sampling moire method. Experimental results showed that our measurement technique is possible for structural evaluation of high temperature large-scale infrastructures.
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