Measuring circuit
US6498501B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1999 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring circuit includes a symmetric transmission line connecting a transducer to a measurement amplifier and to a fault indicating signal amplifier, the transducer delivering symmetric input signals to amplifiers, the first amplifier delivering a measuring signal representing the difference of its input signals and the fault indicating signal amplifier delivering a fault indicating signal representing the sum of the input signals. An auxiliary signal injected to the terminals of the transducer the invention enables the measuring circuit to evaluate the quality of the measuring circuit during operation of the tested machine and also when the machine is at rest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.