Research on NOFRF Entropy-Based Detection Method for Early Damage of Pillar Porcelain Insulator

<div>The response signal and its frequency spectrum in hammer detection. (a) The response signal. (b) The frequency spectrum of the response signal.</div>

Shock and Vibration

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Figure 12

Figure 12: Research on NOFRF Entropy-Based Detection Method for Early Damage of Pillar Porcelain Insulator 