Patent · US Active

Method for detecting aerosol particles in ambient air, involves irradiating analysis volume with radiation modulated with modulation frequency to generate sound pressure waves

US12405201B2 · kind B2 · utility

0Cited by

1References

11Claims

0Family size

Assignee

Hahn-Schickard-Gesellschaft für Angewandte Forschung e. V. · DE

Inventors

Achim Bittner · Heilbronn, DE
Alfons Dehe · Reutlingen, DE
Rebecca Wienbruch · Aach, DE

Key dates

Filing date	Jul 21, 2021
Grant date	Sep 2, 2025
Priority date	—
Expiry date	Jun 17, 2042

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A50/30
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting aerosol particles in ambient air with a photoacoustic gas sensor, wherein an analysis volume is present in the beam path of a modulable emitter such that the emitter can use modulable radiation to excite aerosol particles in the analysis volume to form sound pressure waves which are detectable by means of the sensor. Using the modulable emitter, the analysis volume is irradiated with the modulated radiation to generate sound pressure waves. The generated sound pressure waves are measured by the sensor, whereby the presence and/or concentration of the aerosol particles in the ambient air is determined on the basis of the measurement results. In some embodiments, the aerosol particles are bioaerosols, such as pollen, spores, bacteria and viruses.

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