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公开(公告)号：US11543273B2
公开(公告)日：2023-01-03
申请号：US16718545
申请日：2019-12-18
发明人： Alexander Van Der Lee , Robert Weiss , Hans Spruit
摘要： The invention relates to a method for determining the absolute value of the flow velocity (v) of a particle-transporting medium. At least two measurement laser beams (L_i) with linearly independent, non-orthogonal measurement directions (b_i) are emitted. The measurement laser beams (L_i) scattered at particles are detected and one measurement signal (m_i) is generated in each case for each measurement laser beam (L_i). The measurement signals (m_i) are evaluated, wherein absolute values of velocity components (v_i) are ascertained as projections of the flow velocity (v) on the respective measurement directions (b_i), wherein a solid angle region is ascertained for the prevalent direction of the flow velocity (v) and signs assigned to this solid angle region are chosen for the individual velocity components (v_i), and wherein the absolute value of the flow velocity (v) is determined using the ascertained absolute values of the velocity components (v_i) and using the chosen signs for the velocity components (v_i).
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2.发明申请公开(公告)号：US20210116355A1
公开(公告)日：2021-04-22
申请号：US17128503
申请日：2020-12-21
发明人： Hans Spruit , Alexander Van der Lee , Philipp Henning Gerlach , Robert Wolf , Robert Weiss , Matthias Falk
摘要： A method reduces false-positive particle counts detected by an interference particle sensor module, which has a laser and a light detector. The method including: emitting laser light; providing a high-frequency signal during the emission of the laser light, a modulation frequency of the high-frequency signal being between 10-500 MHz; detecting an optical response by the light detector in reaction to the emitted laser light while providing the high-frequency signal, which is arranged such that a detection signal caused by a macroscopic object positioned between a first and second distance is reduced in comparison to a detection signal caused by the macroscopic object at the same position without providing the high-frequency signal. The high-frequency signal is provided to a tuning structure of the particle sensor module which is arranged to modify a resonance frequency of an optical resonator comprised by the laser sensor module upon reception of the high-frequency signal.
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3.发明申请公开(公告)号：US20200056981A1
公开(公告)日：2020-02-20
申请号：US16541675
申请日：2019-08-15
摘要： The invention relates to an optical particle sensor device (1), comprising an optical emitter device (2), which is designed to emit a multitude N of measurement laser beams (Li) into a vicinity of the optical particle sensor device (1); a detector device (3), which is designed to detect the measurement laser beams (Li) scattered on particles in the vicinity of the optical particle sensor device (1) and to generate to generate a single measuring signal (Ei) assigned to this for each measurement laser beam (Li); and an evaluation device (4), which is designed to determine at least one estimated particle value for the number of particles per volume using at least one single measurement signal (Ei). The evaluation device (4) is designed to determine at least two estimated particle values for the number of particles per volume, which are based on at least partially different single measurement signals (Ei) and/or a different number of single measurement signals (Ei), and on the basis of at least part of the estimated particle values, to determine at least one output value for the particle load.
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4.发明授权公开(公告)号：US10935483B2
公开(公告)日：2021-03-02
申请号：US16541675
申请日：2019-08-15
摘要： An optical particle sensor device comprises an optical emitter device for emitting a multitude of measurement laser beams; a detector device for detecting the measurement laser beams scattered on particles in the vicinity of the optical particle sensor device and for generating a single measuring signal assigned to this for each measurement laser beam; and an evaluation device for determining at least one estimated particle value for the number of particles per volume using at least one single measurement signal, wherein the evaluation device determines at least two estimated particle values for the number of particles per volume, which are based on at least partially different single measurement signals and/or a different number of single measurement signals, and on the basis of at least part of the estimated particle values, determines at least one output value for the particle load.
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公开(公告)号：US20200132582A1
公开(公告)日：2020-04-30
申请号：US16658532
申请日：2019-10-21
发明人： Stefan Weiss , Alexander Herrmann , Robert Wolf , Alexander Van Der Lee , Wolfram Johannes Martin Lyda , Balazs Jatekos , Robert Weiss , Sören Sofke , Hans Spruit , Jens-Alrik Adrian , Matthias Falk , Dominik Moser
摘要： A system for determining a particle contamination and a method for determining a particle contamination in a measurement environment, is provided in which individual particles in the measurement environment are detected (S1), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S2), b) an estimate of the number of particles per volume and characterization information describing the particle source in the measurement information are taken as a basis for ascertaining an output value for the particle contamination in the measurement environment (S3), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S4). The estimation of the characterization information on the basis of the available context-related data avoids the conventional restriction of the evaluable characterization information to firmly prescribed information and instead provides flexible adaptation of the characterization information to be evaluated to the context-related data.
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6.发明授权公开(公告)号：US12055475B2
公开(公告)日：2024-08-06
申请号：US17128503
申请日：2020-12-21
发明人： Hans Spruit , Alexander Van der Lee , Philipp Henning Gerlach , Robert Wolf , Robert Weiss , Matthias Falk
IPC分类号： G01N15/14 , G01N15/1434 , H01S5/183
CPC分类号： G01N15/1434 , H01S5/183 , G01N2015/1454
摘要： A method reduces false-positive particle counts detected by an interference particle sensor module, which has a laser and a light detector. The method including: emitting laser light; providing a high-frequency signal during the emission of the laser light, a modulation frequency of the high-frequency signal being between 10-500 MHz; detecting an optical response by the light detector in reaction to the emitted laser light while providing the high-frequency signal, which is arranged such that a detection signal caused by a macroscopic object positioned between a first and second distance is reduced in comparison to a detection signal caused by the macroscopic object at the same position without providing the high-frequency signal. The high-frequency signal is provided to a tuning structure of the particle sensor module which is arranged to modify a resonance frequency of an optical resonator comprised by the laser sensor module upon reception of the high-frequency signal.
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公开(公告)号：US20220075042A1
公开(公告)日：2022-03-10
申请号：US17530579
申请日：2021-11-19
摘要： A laser sensor module includes a laser diode configured emit a laser beam, an electrical driver configured to supply the laser diode with a driving current to stimulate emission of the laser beam, a detector, and an optical arrangement configured to focus the laser beam to a focus region. The laser diode is arranged to emit the laser beam through the optical arrangement to the focus region. The optical arrangement comprises an emission window. The detector is arranged to determine an interference signal. The laser sensor module comprises a soiling detection unit configured to vary a wavelength of the laser beam with a variation amplitude over a predetermined time period to provide a soiling detection signal indicative of a soiling of the emission window based on an interference signal during the wavelength variation of the laser beam.
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公开(公告)号：US10782221B2
公开(公告)日：2020-09-22
申请号：US16658532
申请日：2019-10-21
发明人： Stefan Weiss , Alexander Herrmann , Robert Wolf , Alexander Van Der Lee , Wolfram Johannes Martin Lyda , Balazs Jatekos , Robert Weiss , Sören Sofke , Hans Spruit , Jens-Alrik Adrian , Matthias Falk , Dominik Moser
摘要： A system for determining a particle contamination and a method for determining a particle contamination in a measurement environment is provided in which individual particles in the measurement environment are detected (S1), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S2), b) an estimate of the number of particles per volume and characterization information describing the particle source in the measurement information are taken as a basis for ascertaining an output value for the particle contamination in the measurement environment (S3), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S4). The estimation of the characterization information on the basis of the available context-related data avoids the conventional restriction of the evaluable characterization information to firmly prescribed information and instead provides flexible adaptation of the characterization information to be evaluated to the context-related data.
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