Method and apparatus for correcting eddy current signal voltage for temperature effects

Patent · Tue Jan 09 04:00:00 EST 1990

OSTI ID:7031825

Kustra, T A; Huntingdon, N; Caffarel, A J

This patent describes an apparatus for measuring physical characteristics of an electrically conductive material in a heated environment. It comprises: eddy current probe means including a primary coil and a reference coil for producing an eddy current signal in response to the probe means coming in contact with the material; resistance measuring means including a digital ohm meter for measuring the resistances of the primary coil and the reference coil; output means for outputting the eddy current signal; and switch means connected between the probe means, the resistance measuring means, and the output means, for connecting the probe means to the resistance measuring means to measure the resistances of the coils, and for connecting the probe means to the output means to obtain the eddy current signal.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4893079; A
• Application Number: PPN: US 7-237203A
• OSTI ID: 7031825
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
DESIGN
EDDY CURRENT TESTING
ELECTRIC CONDUCTIVITY
ELECTRIC MEASURING INSTRUMENTS
ELECTRIC PROBES
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC TESTING
EQUIPMENT
MATERIALS
MATERIALS TESTING
MEASURING INSTRUMENTS
NONDESTRUCTIVE TESTING
PHYSICAL PROPERTIES
PROBES
TEMPERATURE EFFECTS
TESTING
VOLTAGE REGULATORS