Balancing method and apparatus
US4015480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1975 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Nov 26, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M1/225
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present balancing method measures instantaneous analog unbalance representing signals and converts these signals into digital signals. The conversion involves multiplying the measured signals with reference values at least three times within each period of a reference signal. Said reference values are sine or cosine values of an oscillation having the same frequency as the unbalance vibration. The sine and cosine reference values are taken at points of time corresponding to the respective multiplication point of time. The products of all individual multiplications are separately summed for sine and cosine values and at least for one period of the reference signal. Thereafter mean values are formed from the two sums. The just mentioned signal processing steps are performed by digital circuits including digital multipliers, digital summing networks, digital mean value formation circuits, as well as a clock signal generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.