Electric balance with synthetic PID control signal
US7227089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Sep 3, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In electronic balance, an analog computation portion determines at least a differential control signal according to an amount of displacement of a beam. A digital computation portion determines at least an integral control signal is determined by after the amount of displacement of the beam is digital-converted. The control signal component determined by the digital computation portion is analog-converted. Thereafter, a synthetic PID control signal is determined by being synthesized from a resultant signal and the control signal component, which is determined by the analog computation portion. Subsequently, a coil current based on the synthetic PID control signal is passed through the coil. A weight value is obtained according to the control signal component determined by the digital computation portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.