Time domain reflectometry for electrical safety chain condition based maintenance
US10636272B2 · kind B2 · utility
0Cited by
5References
18Claims
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Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Sep 26, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/11
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method of examining an electrical safety chain of an elevator system including: emitting an electric pulse from a time-domain reflectometer into an electrical safety chain of an elevator system; detecting a reflected electric pulse reflected within the electrical safety chain using the time-domain reflectometer; comparing the reflected electric pulse to a baseline reflected electric pulse; and determining a degradation level in response to the reflected electric pulse and the baseline reflected electric pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.