Real-time pollen monitoring using digital holography

Sauvageat, Eric; Zeder, Yanick; Auderset, Kevin; Calpini, Bertrand; Clot, Bernard; Crouzy, Benoît; Konzelmann, Thomas; Lieberherr, Gian; Tummon, Fiona; Vasilatou, Konstantina (2020). Real-time pollen monitoring using digital holography. Atmospheric Measurement Techniques, 13(3), pp. 1539-1550. Copernicus Publications 10.5194/amt-13-1539-2020

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We present the first validation of the SwisensPoleno, currently the only operational automatic pollen mon-itoring system based on digital holography. The device pro-vides in-flight images of all coarse aerosols, and here wedevelop a two-step classification algorithm that uses theseimages to identify a range of pollen taxa. Deterministiccriteria based on the shape of the particle are applied toinitially distinguish between intact pollen grains and othercoarse particulate matter. This first level of discriminationidentifies pollen with an accuracy of 96 %. Thereafter, in-dividual pollen taxa are recognized using supervised learn-ing techniques. The algorithm is trained using data obtainedby inserting known pollen types into the device, and out ofeight pollen taxa six can be identified with an accuracy ofabove 90 %. In addition to the ability to correctly identifyaerosols, an automatic pollen monitoring system needs to beable to correctly determine particle concentrations. To fur-ther verify the device, controlled chamber experiments us-ing polystyrene latex beads were performed. This providedreference aerosols with traceable particle size and numberconcentrations in order to ensure particle size and samplingvolume were correctly characterized.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Microwaves

UniBE Contributor:

Sauvageat, Eric

Subjects:

600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

1867-8548

Publisher:

Copernicus Publications

Language:

English

Submitter:

Simone Corry

Date Deposited:

18 Mar 2021 10:46

Last Modified:

18 Mar 2021 12:40

Publisher DOI:

10.5194/amt-13-1539-2020

BORIS DOI:

10.48350/153018

URI:

https://boris.unibe.ch/id/eprint/153018

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