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Title: Automated measurement system employing eddy currents to adjust probe position and determine metal hardness

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.

Inventors:
 [1];  [2];  [3]
  1. (Kennewick, WA)
  2. (Richland, WA)
  3. (Benton City, WA)
Issue Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
867048
Patent Number(s):
4849693
Assignee:
Battelle Memorial Institute (Richland, WA) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
automated; measurement; employing; eddy; currents; adjust; probe; position; determine; metal; hardness; measuring; cartridge; employs; current; inducing; sensing; component; sensed; signal; utilized; closed; loop; accurately; positioning; relative; lift; direction; tangential; employed; measure; carried; microprocessor; control; facilitating; testing; production; line; basis; closed loop; eddy current; eddy currents; current probe; accurately positioning; production line; microprocessor control; employing eddy; accurately position; /324/

Citation Formats

Prince, James M., Dodson, Michael G., and Lechelt, Wayne M. Automated measurement system employing eddy currents to adjust probe position and determine metal hardness. United States: N. p., 1989. Web.
Prince, James M., Dodson, Michael G., & Lechelt, Wayne M. Automated measurement system employing eddy currents to adjust probe position and determine metal hardness. United States.
Prince, James M., Dodson, Michael G., and Lechelt, Wayne M. Sun . "Automated measurement system employing eddy currents to adjust probe position and determine metal hardness". United States. https://www.osti.gov/servlets/purl/867048.
@article{osti_867048,
title = {Automated measurement system employing eddy currents to adjust probe position and determine metal hardness},
author = {Prince, James M. and Dodson, Michael G. and Lechelt, Wayne M.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

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