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:
-
- Kennewick, WA
- Richland, WA
- Benton City, WA
- Issue Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- OSTI Identifier:
- 867048
- Patent Number(s):
- 4849693
- Assignee:
- Battelle Memorial Institute (Richland, WA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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}
}