Displacement converter
US4357834A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1980 |
| Grant date | Nov 9, 1982 |
| Priority date | — |
| Expiry date | Sep 3, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0072
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A displacement converter useful for pressure gauges and similar instruments, the converter including a displacement detector provided with a variable capacitor responsive to the displacement to be metered and a fixed capacitor insensitive thereto. Also included is an amplitude-controllable oscillator whose AC output is applied to both capacitors, means being coupled to the capacitors to derive therefrom electrical signals which are a function of their capacitance values. These electrical signals are fed to a control circuit to produce a control signal corresponding to the difference therebetween, the control signal being applied to the oscillator to govern the output amplitude thereof in a manner maintaining the control signal at a constant value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.