Apparatus and method for retaining phase information for use with a multiple-coil inductive displacement sensor
US4651130A · kind A · utility
24Cited by
6References
12Claims
0Family size
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Key dates
| Filing date | Aug 28, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Aug 28, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Phase information in a multiple-coil indictive displacement sensor is retained by summing the excitation signal with each of the secondary signals to provide augmented secondary signals which may then be converted to a digital format. A signal processor may then be employed to extract both the magnitude and phase information from the augmented secondary signals by subtracting the magnitude of the primary excitation signal from each of the augmented secondary signals. The resulting signals retain both phase and magnitude information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.