Calibration method and apparatus for an electronic weight indicator
US4535854A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1982 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Nov 16, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G23/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic weight indicator adapted to convert an analog output of a load cell into a digital display which, after initial calibration, automatically corrects for dead load, drift and other calibration errors introduced by the circuitry. The meter can also be programmed to count for creep. The weight indicator employs a microprocessor to control an analog-to-digital converter which converts the analog signal from the load cell to a digital display. The microprocessor employs a unique algorithm permanently retained in an associated memory to correct for drift and compensate for deadload changes and creep. Once calibrated, no further adjustments by the user are required. All adjustments are made automatically, without operator intervention. The weight indicator can be used with any load cell producing an analog signal in response to a force, e.g. a weight on a weighing platform connected to the load cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.