Induction-type linear position detector device
US6034624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1997 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Mar 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2216
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A winding section includes a primary winding to be excited by a single-phase A.C. signal, and a plurality of secondary windings provided at different locations with respect to a predetermined direction of linear movement. A variable magnetic coupling section includes a plurality of magnetic response members provided in repetition at a predetermined pitch along the direction of linear movement, and allows inductive A.C. output signals, amplitude-modulated in accordance with a varying linear position of an object of detection, to be produced in the individual secondary windings with amplitude function characteristics differing depending on positional differences between the secondary windings. Each of the inductive A.C. output signals produced in the secondary windings varies in its amplitude function in periodic cycles each corresponding to the pitch length of the magnetic response members. The variable magnetic coupling section may include a core section made of a wire, and the magnetic response members in the form of metal pieces provided at the predetermined pitch and secured by caulking to the core section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.