Automated measurement system employing eddy currents to adjust probe position and determine metal hardness
Patent
·
OSTI ID:867048
- Kennewick, WA
- Richland, WA
- Benton City, WA
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.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA
- DOE Contract Number:
- AC06-76RL01830
- Assignee:
- Battelle Memorial Institute (Richland, WA)
- Patent Number(s):
- US 4849693
- OSTI ID:
- 867048
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/324/
accurately
accurately position
accurately positioning
adjust
automated
basis
carried
cartridge
closed
closed loop
component
control
current
current probe
currents
determine
direction
eddy
eddy current
eddy currents
employed
employing
employing eddy
employs
facilitating
hardness
inducing
lift
line
loop
measure
measurement
measuring
metal
microprocessor
microprocessor control
position
positioning
probe
production
production line
relative
sensed
sensing
signal
tangential
testing
utilized
accurately
accurately position
accurately positioning
adjust
automated
basis
carried
cartridge
closed
closed loop
component
control
current
current probe
currents
determine
direction
eddy
eddy current
eddy currents
employed
employing
employing eddy
employs
facilitating
hardness
inducing
lift
line
loop
measure
measurement
measuring
metal
microprocessor
microprocessor control
position
positioning
probe
production
production line
relative
sensed
sensing
signal
tangential
testing
utilized