Motion detection by pulse signal generation
US6259248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Sep 10, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9515
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pulse signal generator comprises a magnetic element (10) capable of causing a large Barkhausen jump, a detector for detecting a change of magnetic field in the magnetic element, a magnetic field source (30) for magnetizing the magnetic element in a predetermined direction and a permanent magnet (40). The pulse signal generator further comprises an auxiliary member (50) provided such that the magnetic element is flanked between the permanent magnet and the auxiliary member and is in a magnetic field between the permanent magnet and the auxiliary member. The magnetic field varies with movement of an object (60) to be detected with respect to the permanent magnet to produce a magnetic change in the magnetic element which is detected by the detector to produce a pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.