Multi-chambered acoustic sensor for determination gas composition
US9217663B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2012 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H5/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sound velocity sensor is defined by a hermetic multi-chambered enclosure for containing flowing gases and mixtures of gases. The contained flowing gases are acoustically excited and the acoustic energy is measured over a fixed distance between a first sending end of the enclosure and a receiving end. The speed of sound of the gases are determined by comparing the energy transmitted through the flowing gases at various frequencies so as to precisely determine the resonant frequency of the gases flowing through the enclosure. In accordance with the present design, the chambers of the enclosure include internal transition shapes therebetween for optimizing the transmission of acoustic energy through the flowing gases and also enhancing one or more additional resonant modes at higher useful frequencies. The transition shapes used in connection with the sensor can be at least one of parabolic, hyperbolic, linear and exponential in nature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.