Sensing mirror position in a powered mirror positioning system
US6478436B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | May 22, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R1/072
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An axial lead screw having one end pivotally connected to a rearview mirror is threadedly engaged by a motor driven worm gear, which upon rotation effects axial movement of the lead screw. A pair of flux collectors are disposed on opposite sides of the lead screw adjacent the distal end. A Hall effect sensor is disposed in one of the flux collectors. The distal end of the lead screw is magnetized and the Hall effect sensor provides a signal indicative of the lead screw movement. In one embodiment, the lead screw is magnetized; and, in another embodiment a permanent magnet is inserted in a bore in the distal end of the lead screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.