System for detecting defective point on power transmission line by utilizing satellite
US5070537A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 24, 1989 |
| Grant date | Dec 3, 1991 |
| Priority date | — |
| Expiry date | Nov 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/088
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a system for detecting any defective point on a power transmission line by making use of highly-accurate time signal transmitted from a satellite and by utilizing a digital data processing system. The system comprises a master station and a subordinate station, each of the stations having a surge detection circuit capable of detecting a surge voltage generated as a result of cutting of a power transmission line, a GPS receiver for delivering a predetermined periodical pulse and a reset signal in accordance with the electric wave from a satellite, and a time counter/time base which is reset at a period of 1 second in accordance with the signal from the GPS receiver and which is capable of converting a pulse of a predetermined period derived from the GPS receiver into a binary-coded digital signal, the system further comprising modulation/demodulation means for enabling the digital signal generated by the time counter/time base to be transmitted from the subordinate station to the master station, and a processor controller provided in the master station and capable of conducting a comparison between the digital signals so as to determine the distance to the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.