Automated measurement system employing eddy currents to adjust p

Details Automated measurement system employing eddy currents to adjust p Automated measurement system employing eddy currents to adjust p

1988-02-29

1989-07-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

With compensation for test variable

324227, 324233, 324243, G01N 2772, G01R 3314, G01R 3312

Patent

active

048496936

ABSTRACT:
A system for measuring the hardness of cartridge cases employs an eddy current probe for inducing and sensing eddy currents in each cartridge case. A first component of the sensed signal is utilized in a closed loop system for accurately positioning the probe relative to the cartridge case both in the lift off direction and in the tangential direction, and a second component of the sensed signal is employed as a measure of the hardness. The positioning and measurement are carried out under closed loop microprocessor control facilitating hardness testing on a production line basis.

REFERENCES:
patent: 2846065 (1956-08-01), Alexander
patent: 4727322 (1988-02-01), Lanchampt et al.

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