Selection and Test Analysis of Ultrasonic Testing Technology of Strut Porcelain Insulator

Based on experimental results for conventional ultrasonic creeping wave, straight beam probe, small angle longitudinal wave, micro-paralleling creeping wave, an approach is proposed to select small angle longitudinal wave and micro-paralleling creeping wave to detect strut porcelain insulator. The choice of ultrasonic apparatus, probe and test block, the adjustment manner of working sensitivity and sweep speed, the principle of decision defect are presented.