Differential clear container sensor with improved noise immunity
US6018159A · kind A · utility
4Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photoelectric sensing unit, especially useful for determining the passage of clear bottles or other low contrast targets on a conveyor, contains two sensors and a signal processing unit to determine the signal differential. The signal differential is compared to a selected value and sensor output is enabled or disabled. High noise immunity, resistance to target reflection, and output reliability result. The unit may correct the selected value to account for environmental change and/or unit component performance. The unit can also figure the speed of passage of the bottles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.