Device for defect testing of non-ferromagnetic test samples and for ferromagnetic inclusions
摘要
Detection of both surface defects of a non-ferromagnetic test body as well as the presence of ferromagnetic particles in the test body by inducing eddy currents and D.C. fields in the body. The resulting signal voltages are filtered and separately examined.
申请公布号
US4954777(A)
申请公布日期
1990.09.04
申请号
US19880282450
申请日期
1988.12.09
申请人
INSTITUT DR. FRIEDRICH FORSTER PRUFGERATEBAU GMBH & CO. KG
发明人
KLOPFER, WALTER;HAUG, FRITZ;GABAUER, DALE;WORKLEY, JAMES