Method and apparatus for measuring the loop self impedance of shielded wiring non-intrusively utilizing the current transformer ratio of a sense current probe and the current transformer ratio of a drive current probe
US5378992A · kind A · utility
15Cited by
11References
2Claims
0Family size
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Key dates
| Filing date | Jun 10, 1993 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Jun 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for non-intrusively measuring the shielding effectiveness of coaxial wiring by employing an inductive current probe which causes current to flow on the shield of the wiring. A second inductive current probe senses the current on the shield circuit and outputs a voltage which is a function of the shield current. The method employs loop self-impedance in contrast to transfer impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.