Capacitance monitoring systems
US6836124B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/087
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitance monitoring system includes a capacitance gauge head for monitoring the capacitance between a measuring electrode and an electric cable travelling along a path parallel to the measuring electrode. The output from the capacitor gauge head is fed to a Fast Fourier Transform device (40) to produce, to indicate discrete cyclical faults in the cable and the frequencies to which they would be relevant. A cable speed detector (44) feeds a reference table device which stores different correction factors to correct the amplitude of the cyclical faults detected due to the attenuation imposed on the measured signal because of the specific length of the electrode. A multiplier (46) multiplies the cyclical fault signals detected by the relevant factors from the reference table device (42).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.