Apparatus for remotely determining the angular orientation, speed and/or direction of rotary objects
US4779094A · kind A · utility
Inventors
Key dates
| Filing date | Nov 21, 1986 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Nov 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circular array of equally spaced, identical stationary electrodes are arranged about the center of the array and a rotary electrode is substantially arranged on a surface of the rotary member to be monitored in such a manner that M among N stationary electrodes have a maximum capacitance by being in confronting relationship to the rotary electrode according to the angular position of the rotary member, a maximum capacitance is in proportion to .theta. which is the azimuthal angle of the radius as measured from the initial end of the stationary electrode. The angular position of rotary member is identified from the stationary electrodes which are in confronting relationship to rotary electrode and are identified by measuring the output signal owing to a maximum capacitance while scanning the stationary electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.