Patent · US Active

Photoacoustic gas analyzer for determining species concentrations using intensity modulation

US11061002B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

David Tumpold · Tauberbischofsheim, DE
Gueclue Onaran · Munich, DE
Christoph Glacer · Munich, DE

Key dates

Filing date	Feb 24, 2020
Grant date	Jul 13, 2021
Priority date	—
Expiry date	Feb 24, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/02809
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A photoacoustic gas analyzer, including: a gas chamber to receive a gas to be analyzed; a radiation source that emits into the gas chamber electromagnetic radiation with a time-varying intensity to excite gas molecules of N mutually different gas types the concentrations of which are to be determined in the received gas, wherein the radiation source is operable in N mutually different modes, each mode having a unique emission spectrum different from the emission spectra of the other N−1 modes; an acoustic-wave sensor that detects acoustic waves generated by the electromagnetic radiation emitted into the gas to be analyzed; and a control unit to operate the radiation source in the different modes respectively to emit electromagnetic radiation with a time-varying intensity; to receive in each mode from the acoustic-wave sensor signals; and to determine from the signals received in each mode the concentrations of the N mutually different gas types.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.