Metal Resistivity Measuring Device
An eddy current device is designed for detecting discontinuities in metal samples. Alternate short and long duration pulses are inductively applied to a metal sample via the outer coil of a probe. The lorg pulses give a resultant signal from the metal sample responsive to probe-tosample spacing and discontinuities with the sample, and the short pulses give a resultant signal responsive only to probe-to-sample spacing. The inner coil of the probe detects the two resultant signals and transmits them to a separation network where the two signals are separated. The two separated signals are then transmitted to a compensation network where the detected signals due to the short pulses are used to compensate for variations due to probeto-sample spacing contained in the detected signals from the long pulses. Thus a resultant signal is obtained responsive to discontinuities within the sample and independent of probe-to- sample spacing.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-009162
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- 2,965,840
- OSTI ID:
- 4099505
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
Similar Records
NONDESTRUCTIVE EDDY CURRENT TESTING
Eddy current inspection tool which is selectively operable in a discontinuity detection mode and a discontinuity magnitude mode