Analysis and compensation circuit for an inductive displacement sensor
US8008909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2006 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Mar 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit arrangement for analysis and compensation of the signals for an inductive displacement sensor is provided. The circuit includes a first operating amplifier, a second operating amplifier and a coil for a displacement measurement, in parallel with the second operating amplifier output and the second operating amplifier first input and connected to a capacitance in series with the coil inductance and coil resistance to form an RLC series tuned circuit. In order to improve the accuracy of a measured resonance frequency, the circuit arrangement can be extended with a second coil for a temperature compensation, by connecting a first of the ends of the coil winding to a second end of the coil winding of the first coil and a second of the ends of the coil winding to the second input of the first operating amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.