Array for non-destructive material testing of cylindrical workpieces by means of electrodynamic ultrasonic measurement
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United States of America Patent
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Jan 18, 1994
Grant Date -
N/A
app pub date -
Aug 6, 1991
filing date -
Aug 7, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An array for non-destructive material testing of cylindrical workpieces such as pipes or ends thereof by means of leakage-flux measurement and if necessary electrodynamic ultrasonic excitation is proposed. A leakage-flux measuring head (56) used for leakage-flux measurement comprises at least two Hall probes (80) disposed along a line parallel and/or vertical to the magnetic field generated by a magnet (10) and forming at least one Hall probe line. In addition, the leakage-flux measuring head has at least two sliding blocks (94, 96, 98, 100) spaced apart and supportable on the workpiece, between which the Hall probes are disposed. The leakage-flux measuring head is also provided with a protective plate covering the faces of the Hall probes on the workpiece side.
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