Weight scale fault detection
US7533799B2 · kind B2 · utility
10Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2006 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | May 15, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07G1/0072
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-service checkout terminal includes a scanner and a weight scale. The customer passes each item past the scanner to identify the item and obtain weight data for that item from a centralized database, including a mean weight and a standard deviation. An error value is calculated from the measured weight of each item and the weight data. The error value of all items scanned during the common transaction are summed to produce an accumulated error for the particular weight scale during that transaction. This accumulated error is compared to a threshold value to determine whether a fault condition exists at the weight scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.