Possibility of Electrical Discharge Pulse Sound for Hammering Test

摘要

In this study, it was investigated that the possibility of electrical discharge pulse sound for new inspection technologies instead of hammering test. Electrical discharge pulse sound was applied for hammering sound and sensor by using sound detection was applied for optical fiber vibration sensor. The numerical analysis result using the FEM and the experiment result along with the single pulse discharge was compared. As the result, it was estimated that the generation factor of the elastic wave was same as the current duration. These results become possible to estimate the propagation characteristic of elastic wave. Evaluation of electrical discharge sound for hammering test by using optical fiber sensor was investigated. Defect shape and scale was estimated from comparison with detected waveform by using optical fiber vibration sensor and simulated waveform. As the results, it was considered that electrical discharge sound was available for hammering test.