Phase-sensitive transducer apparatus with improved signal offset means
US4109189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1976 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Nov 2, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A phase-sensitive transducer apparatus comprises first and second relatively movable members, the first relatively movable member having a plurality of windings and the second relatively movable member having a winding. Means are included for applying a first input signal to one of the windings of the first relatively movable member and a second input signal to another of the windings of the first relatively movable member. An output signal is developed on the winding of the second relatively movable member. The first and second input signals are sinusoidal in nature of substantially identical frequency and peak amplitude and are phase-displaced by a predetermined amount, and the output signal is substantially constant in peak amplitude and variable in phase during relative movement of the first and second relatively movable members. Further means is included which responds to the first input signal and to the output signal for generating a position signal indicative of the relative movement of the first and second relatively movable members, the position signal alternating during such relative movement between first and second voltage levels. Also, additional means is included whi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.