Device for detecting the speed and direction of a movable component using a single signal line
US5500585A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1993 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Oct 20, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for detecting the movement of a movable component in that the position signals furnished by two position sensors are added to a signal that is conducted through a signal line to an evaluation arrangement. The position ranges associated with the position sensors have an overlapping region. From the position signals, a signal processing arrangement determines a direction signal and a speed signal. Two current sources are actuated by the direction signal and the speed signal to impress predetermined currents in the signal line. The currents are added in the signal line. In a first embodiment, a signal transmitted over the signal line has four different levels. In another embodiment, the signal transmitted over the signal line has three different levels. The device according to the present invention is particularly suitable for use in an adjustment drive provided in a motor vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.