Measurement device and method for diagnosis of noise in fluidic systems
US8220333B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2009 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Jan 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/243
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement device and method for diagnosing noise in fluidic systems. A microphone, which is arranged at least partially in the area of the flow medium, compensates for pressure surges in the flow medium. The microphone receives the noise via a membrane and converts it to an electrical signal for evaluation of the noise source by an electronic diagnosis unit. To compensate for pressure surges in the flow medium, the membrane of the microphone is arranged in a housing, which is open on both sides of the membrane and whose two openings have pressure applied to them by the flow medium as a sound source, with at least one of the two openings being provided, in order to detect noise, with filter means for attenuation and/or time delay of frequencies which are in an expected noise spectrum, while the filter means allows lower frequencies produced by the pressure fluctuations in the flow medium to pass through.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.