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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. 14 figs.

Inventors:
; ;
Issue Date:
OSTI Identifier:
7266869
Patent Number(s):
4849693
Application Number:
PPN: US 7-162020
Assignee:
Battelle Memorial Inst., Richland, WA (United States)
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Resource Relation:
Patent File Date: 29 Feb 1988
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CONTAINERS; EDDY CURRENT TESTING; HARDNESS; PROBES; POSITIONING; AMMUNITION; COMPUTERIZED CONTROL SYSTEMS; CONTROL SYSTEMS; ELECTROMAGNETIC TESTING; MATERIALS TESTING; MECHANICAL PROPERTIES; NONDESTRUCTIVE TESTING; ON-LINE CONTROL SYSTEMS; ON-LINE SYSTEMS; TESTING; 420500* - Engineering- Materials Testing

Citation Formats

Prince, J M, Dodson, M G, and Lechelt, W M. Automated measurement system employing eddy currents to adjust probe position and determine metal hardness. United States: N. p., 1989. Web.
Prince, J M, Dodson, M G, & Lechelt, W M. Automated measurement system employing eddy currents to adjust probe position and determine metal hardness. United States.
Prince, J M, Dodson, M G, and Lechelt, W M. Tue . "Automated measurement system employing eddy currents to adjust probe position and determine metal hardness". United States.
@article{osti_7266869,
title = {Automated measurement system employing eddy currents to adjust probe position and determine metal hardness},
author = {Prince, J M and Dodson, M G and Lechelt, W 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. 14 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {7}
}