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公开(公告)号：US10274410B1
公开(公告)日：2019-04-30
申请号：US15946579
申请日：2018-04-05
发明人： Elric Saaski , Dor Yacobi
摘要： A particle detector that includes a housing defining a chamber, and an air stream injector, producing an airstream with entrained particles, in the chamber. A light source produces a light beam that intersects with and is wider than the air stream. A light detection assembly detects light generated by scattering of the light beam, by particles in the air stream. A digitizer produces a sequence of scattering digital values, each representing light detected per a first unit of time duration. Additionally, a summing assembly produces a sequence of summed scattering digital values, 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 and overlap by n−1 of the first units of time duration with a nearest neighbor. Finally, a detection assembly processes the summed scattering digital values to detect particles.
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公开(公告)号：US11340153B2
公开(公告)日：2022-05-24
申请号：US17062713
申请日：2020-10-05
发明人： Elric Saaski , Dor Yacobi
摘要： A particle detector, having a housing defining a chamber; an air stream injector, producing an airstream in said chamber from air taken from outside said chamber; a light source, producing a light beam that crosses the air stream and wherein said light beam is shaped so that a transverse extent of said light beam has a uniform intensity over said transverse extent of said air stream. Also, a photon detection assembly, including an optical train of lenses, is positioned to accept light from said light beam, emitted by the particles, and to focus this light onto a photon detector. A particle detection assembly detects the particles, responsive to the photon detection assembly. Finally, a particle size estimation assembly estimates size for each detected particle, based on number of photons detected by said photon detection assembly from said particle, as it crosses said light beam.
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公开(公告)号：US10444137B2
公开(公告)日：2019-10-15
申请号：US15946588
申请日：2018-04-05
发明人： Elric Saaski , Dor Yacobi
摘要： A method of detecting bioaerosols, including detecting particles and estimating a particle size for each detected particle and determining a fluorescence strength for each detected particle. Comparing particle size and fluorescence strength for each detected particle to arrive at a normalized fluorescence strength per particle and comparing normalized fluorescence strengths over a time period to a maximum threshold, to detect highly fluorescent manmade substances.
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公开(公告)号：US10267723B1
公开(公告)日：2019-04-23
申请号：US15946560
申请日：2018-04-05
发明人： Elric Saaski , Dor Yacobi
IPC分类号： G01N15/14
摘要： A particle detector that includes a housing defining a chamber, and an air stream injector, producing an airstream with entrained particles, in the chamber. A light source produces a light beam that intersects with and is wider than the air stream. A light detection assembly detects light generated by scattering of the light beam, by particles in the air stream. A digitizer produces a sequence of scattering digital values, each representing light detected per a first unit of time duration. Additionally, a summing assembly produces a sequence of summed scattering digital values, 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 and overlap by n−1 of the first units of time duration with a nearest neighbor. Finally, a detection assembly processes the summed scattering digital values to detect particles.
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公开(公告)号：US10794815B2
公开(公告)日：2020-10-06
申请号：US16287874
申请日：2019-02-27
发明人： Elric Saaski , Dor Yacobi
摘要： A particle detector that includes a housing defining a chamber, and an air stream injector, producing an airstream with entrained particles, in the chamber. A light source produces a light beam that intersects with and is wider than the air stream. A light detection assembly detects light generated by scattering of the light beam, by particles in the air stream. A digitizer produces a sequence of scattering digital values, each representing light detected per a first unit of time duration. Additionally, a summing assembly produces a sequence of summed scattering digital values, 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 and overlap by n−1 of the first units of time duration with a nearest neighbor. Finally, a detection assembly processes the summed scattering digital values to detect particles.
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