System for generating a signal to superimpose information
US6653968B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/142
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for generating a signal which, in addition to first information representing the rotational speed of a rotating part, contains at least second information. The signal changes over time between a first and a second current level and/or voltage level (high/low). The first information is represented by the time interval between a substantially identical change either between the first to the second level (high/low edge) or a substantially identical change between the second to the first level (low/high edge). On the other hand, the second information is represented by the length of time either of the first or of the second level. No further current levels or voltage levels are used to transmit the additional information, and that the additional information can be evaluated relatively simply. High data integrity can be attained by pulses which are as long as possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.