Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Neural-network-based spatial light-scattering instrument for hazardous airborne fiber detection

Not Accessible

Your library or personal account may give you access

Abstract

A laser light-scattering instrument has been designed to facilitate the real-time detection of potentially hazardous respirable fibers, such as asbestos, within an ambient environment. The instrument captures data relating to the spatial distribution of light scattered by individual particles in flow by use of a dedicated multielement photodiode detector array. These data are subsequently processed with an artificial neural network that has previously been trained to recognize those features or patterns within the light-scattering distribution that may be characteristic of the specific particle types being sought, such as, for example, crocidolite or chrysotile asbestos fibers. Each particle is thus classified into one of a limited set of classes based on its light-scattering properties, and from the accumulated data a particle concentration figure for each class may be produced and updated at regular intervals. Particle analysis rates in excess of 103/s within a sample volume flow rate of 1 l/min are achievable, offering the possibility of detecting fiber concentrations at the recommended maximum exposure limit of 0.1 fibers/ml within a sampling period of a few seconds.

© 1997 Optical Society of America

Full Article  |  PDF Article
More Like This
Real-time detection of airborne asbestos by light scattering from magnetically re-aligned fibers

Christopher Stopford, Paul H. Kaye, Richard S. Greenaway, Edwin Hirst, Zbigniew Ulanowski, and Warren R. Stanley
Opt. Express 21(9) 11356-11367 (2013)

Light scattering from nonspherical airborne particles: experimental and theoretical comparisons

Edwin Hirst, Paul H. Kaye, and John R. Guppy
Appl. Opt. 33(30) 7180-7186 (1994)

Asbestos Real-Time monitor in an atmospheric environment

Norihisa Hiromoto, Kosei Hashiguchi, Shigeo Ito, and Toshikazu Itabe
Appl. Opt. 36(36) 9475-9480 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved