Load cell scale with reference channel for live load correction
US4751973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1987 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Sep 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G23/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Cancellation of noise in the weighing channel output of an electronic scale due to external vibrations is achieved by use of a reference, non-weighing channel in the scale. The reference channel is exposed to the vibrations affecting the weighing channel. The average output, Aavg, of the reference channel is divided by the instantaneous output, A.sub.t, thereof, and the result is multiplied by the instantaneous output, W.sub.t, of the weighing channel to obtain a corrected output, Wavg, indicative of the weight of an article plus tare. Method and Apparatus are disclosed. Analog and Digital embodiments of the apparatus are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.