Magnetic or magneto-inductive materials tester with improved pro

Details Magnetic or magneto-inductive materials tester with improved pro Magnetic or magneto-inductive materials tester with improved pro

1979-06-07

1982-05-25

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With compensation for test variable

324233, 328150, 328162, G01N 2772, G01R 3312, H03K 1700, H03B 100

Patent

active

043319203

ABSTRACT:
A magneto-inductive materials tester has probes which, when brought into contact with the material, produce an electrical signal corresponding to properties of the material desired to be tested. Apparatus for evaluating this test signal has at least one device for producing a compensation voltage to eliminate residual or drift error voltages that may be superimposed on the test signal. The compensating device includes a counting pulse generator, at least one pulse counter connected to the generator at least temporarily, and a digital/analog converter connected to the pulse counter output to provide the desired compensation voltage.

REFERENCES:
patent: 3550018 (1970-12-01), James et al.
patent: 3824481 (1974-07-01), Sponholz et al.
patent: 3842371 (1974-10-01), Kelley

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