Apparatus for detecting surface flaws in cylindrical articles by

Details Apparatus for detecting surface flaws in cylindrical articles by Apparatus for detecting surface flaws in cylindrical articles by

1993-10-29

1996-07-02

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

209567, 324232, 324233, G01N 2782, G01N 2790, G01R 3312, B07C 5344

Patent

active

055325912

ABSTRACT:
An apparatus for detecting surface flaws in cylindrical articles by means of asymmetric magnetic detection, utilizing a rotating magnetic field, said articles having central longitudinal axes, apparatus having a guide assembly for guiding the cylindrical articles along a displacement path having a central longitudinal axis extending coaxially of the central longitudinal axes of the articles and a pair of multiple polar sensor assemblies positioned in annular relationship with the displacement path for producing a plurality of phase/amplitude modulated signals representative of the surface geometry of the inspected cylindrical article, also disclosed are two embodiments of cylindrical container flange imperfection detector apparatus utilizing multiple polar sensor assemblies.

REFERENCES:
patent: 4002966 (1977-01-01), Hinds et al.
patent: 4785243 (1988-11-01), Abramczyk et al.
patent: 5119023 (1992-06-01), Lloyd
patent: 5130653 (1992-07-01), Wu et al.
patent: 5311127 (1994-05-01), Bisiaux

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