Automated eddy current metal hardness measurement system

Details Automated eddy current metal hardness measurement system Automated eddy current metal hardness measurement system

G - Physics

01

N

324/48

G01N 27/80 (2006.01) G01N 27/72 (2006.01) G01N 27/90 (2006.01) G01R 33/12 (2006.01) G01R 33/14 (2006.01)

Patent

CA 1309463

Abstract of the Disclosure A system for measuring the hardness of car- tridge 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.

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