Rotating-probe defect detecting device

Details Rotating-probe defect detecting device Rotating-probe defect detecting device

1985-03-15

1987-11-10

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324237, 324262, G01N 2772

Patent

active

047060220

ABSTRACT:
A rotating-probe type defect detecting device, used for continuous inspection of an elongated test object moving in the longitudinal direction, such as round metal bar drawn out from a set of dies, comprising a plurality of test probes supported by a rotating frame structure around the object in a plane orthogonal to the central axis of the object for revolving about the object at high rotational stability, is provided. The device includes an inventive circuit for processing the output signals of the probes to enhance defect indicative portions of the signals and suppress the noise level, thereby exhibiting an improved detection characteristic of high signal-to-noise (S/N) ratio.

REFERENCES:
patent: 3736501 (1973-05-01), Donkin
patent: 4218651 (1980-08-01), Ivy
patent: 4243939 (1981-01-01), Grossman et al.
patent: 4355281 (1982-10-01), Toth et al.
patent: 4596953 (1986-06-01), Nagasaka et al.

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