Apparatus and method for signal synchronization
US9784601B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2014 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Mar 25, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system is described for time synchronizing digitized measurement signals, such as vibration signals. The digitized signals, which are acquired asynchronously by multiple distributed measurement units, indicate the operational condition of a machine or a process. To measure the phase of the digitized signals relative to a pulse tachometer input, the time between the leading edge of the tachometer pulse and the digitized samples is measured. To achieve phase-coherent synchronization across the distributed measurement units, a local synchronization signal is embedded into the data produced by the measurement units. The systems uses the synchronization signal to align the data in post processing, which phase aligns the data and aligns the data in absolute time. The synchronization signal may be encoded with a timestamp to provide additional timing information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.