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

An active vibrometer used for the non-destructive test of electric power transmission line insulators has been developed. With a permanent magnet and a couple of coils, the vibrometer exerts impact force to a test object and in turn picks up the vibration of the object. The resonance frequencies wit...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2010-03, Vol.43 (2), p.70-77
Main Authors: Cho, Byung-Hak, Lee, Jae-Kyung, Park, Joon-Young
Format: Article
Language:English
Subjects:
Active vibrometer
Applied sciences
Coils
Crack inspection
Cross-disciplinary physics: materials science
rheology
Defects
Electric power transmission
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Industrial metrology. Testing
Insulators
Materials science
Materials testing
Mechanical engineering. Machine design
Non-destructive test
Nondestructive testing
Physics
Resonance frequency
Solid mechanics
Structural and continuum mechanics
Vibration
Vibration meters
Vibrometers
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Description
Summary:An active vibrometer used for the non-destructive test of electric power transmission line insulators has been developed. With a permanent magnet and a couple of coils, the vibrometer exerts impact force to a test object and in turn picks up the vibration of the object. The resonance frequencies with the amplitudes obtained from the vibrometer are used as a basis for detecting defects in the object. The vibrometer is controlled by an electronic device designed to facilitate the fully automated testing process with consistent repeatability and reliability which are essential to the non-destructive test. The vibrometer is expected to be applied to the wide area of defect detection including the classification of mechanical parts in production and inspection processes.
ISSN:0963-8695
1879-1174
DOI:10.1016/j.ndteint.2009.06.004