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Bioaerosol particle detector

A bioaerosol and detector technology, which is applied in the fields of biological particle analysis, individual particle analysis, particle suspension analysis, etc., can solve the problems of expensive cleaning and high cost of reflective optical components

Pending Publication Date: 2020-07-17
CBRN国际有限责任公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this can create significant expense in system manufacture and maintenance, as reflective optics can be very expensive and difficult to clean without damaging reflective surfaces

Method used

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Embodiment Construction

[0033] The following embodiments and their various aspects are described and illustrated in conjunction with systems, tools and methods which are intended to be illustrative and explanatory rather than limiting in scope. In various embodiments, one or more of the above-mentioned problems have been reduced or eliminated, while other embodiments involve other improvements.

[0034] Preferred Embodiment System Overview

[0035] refer to figure 1 , in a preferred embodiment of the bioaerosol detector 10 (which may also be referred to as a “particle detector”), the housing 12 defines a chamber 14 . Air nozzle assembly 16 and centrifugal air pump 18 (which may collectively be referred to as an "air stream injection assembly") generate an air stream 20 having a constant flow rate. Moreover, the light source optical train 22 (which may simply be referred to as "the light source") produces an ultraviolet (UV) fluorescence-excited beam 24 at a 90-degree angle to the airflow 20 such th...

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Abstract

A particle detector (10) includes a housing (12) defining a chamber (14), and an air stream injector (16), producing an airstream with entrained particles (20), in the chamber. A light source (22) produces a light beam (24) that intersects with and is wider than the air stream. A light detection assembly (40) detects light generated by scattering of the light beam, by particles in the air stream.A digitizer (38) produces a sequence of scattering digital values, each representing light detected per a first unit of time duration. Additionally, a summing assembly (39) produces a sequence of summed scattering digital values (41), each equaling a sum of a sequential set of n of the digital values, and wherein successive summed digital values are offset by a the first unit of time duration andoverlap by n-1 of the first units of time duration with a nearest neighbor. Finally, a detection assembly (42) processes the summed scattering digital values to detect particles.

Description

technical field [0001] The present invention relates to light-emitting diode-based bioluminescent particle detectors. Background technique [0002] In many cases, it is necessary to determine the level of bioaerosols in the surrounding air. Many human, animal and plant pathogens such as viruses and bacteria are transmitted from one host to another by attaching to otherwise benign aerosol particles or passing through purposeful aerosol life cycle stages such as spores. These bioaerosols are particularly hostile in pharmaceutical manufacturing facilities and any type of clean room. [0003] There are a limited number of methods for monitoring bioaerosols. The company Proengin of Saint-Cyr-l'école, France markets a product that passes a stream of sampled air through a hydrogen flame. The company's literature shows that the spectral signatures produced by the oxidation of bioaerosols can be used to detect many different types of pathogenic organisms. However, it is likely th...

Claims

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Application Information

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IPC IPC(8): G01N15/14G01N21/64G01N15/00G01N15/02
CPCG01N2015/0046G01N15/1459G01N15/1434G01N15/0211G01N15/06G01N2015/019G01N15/01G01N15/075G01N15/1404G01N15/1409G01N21/6486G01N15/0205
Inventor 艾瑞克·萨斯奇
Owner CBRN国际有限责任公司
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