Magnet–Solenoid type active vibrometer for non-destructive testing of electric power transmission line insulators

Cho, Byung-Hak; Lee, Jaekyung; Park, Joon‐Young

doi:10.1016/j.ndteint.2009.06.004

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Therefore, they must be inspected online frequently to ensure safety and reliability, and prevent catastrophic failure. Various nondestructive testing (NDT) methods have been developed to detect cracks in porcelain insulator [2] . A few years ago, a novel technique for visualizing ultrasonic waves in general solid media by pulsed laser scan, called the laser-generation based imaging (LGBI) method based on the Reciprocity theorem has been proposed by Takatsubo et al [3][4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Laser-Ultrasound Testing of Cracks in Porcelain Insulator

Hou

Wang

et al. 2013

AMR

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Detected the cracks in porcelain insulator is a strategy to prevent failure. This study proposes a remote detect technique to inspect the cracks in on-line porcelain insulator based on laser-generation based imaging (LGBI) method. Two porcelain insulators samples A and B were designed. Samples A is a 10kv porcelain insulator work outdoors, it has five artificial notch-type defects in the cylindrical surface of porcelain insulator. Sample B is a 10kv porcelain insulator work indoor with aging cracks. All defects in two specimens were detected by laser ultrasonic visualizing inspector (LUVI). Images are quite convenient to confirm cracks morphology. The experiment proves that the cracks in porcelain insulator can be detected by LUVI system.

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