Method for detection of a marked element in proximity to a sensor
US5410246A · kind A · utility
3Cited by
19References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting a marked element on an eddy wheel in proximity to a sensor is described. The method includes the steps of accumulating sensor output signals over a selected time period. The number of sensor output signal over a first and second time period are determined. From that number an average value is calculated. A threshold value is established for the average for determining whether the marked is present. The threshold value is compared to the average value. If the average value is greater than the threshold value, an output signal is generated to indicate the presence of the mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.