WO2018095719A1 - Dispositif de mesure de particules et procédé pour déterminer une grandeur de particules - Google Patents

Dispositif de mesure de particules et procédé pour déterminer une grandeur de particules Download PDF

Info

Publication number
WO2018095719A1
WO2018095719A1 PCT/EP2017/078346 EP2017078346W WO2018095719A1 WO 2018095719 A1 WO2018095719 A1 WO 2018095719A1 EP 2017078346 W EP2017078346 W EP 2017078346W WO 2018095719 A1 WO2018095719 A1 WO 2018095719A1
Authority
WO
WIPO (PCT)
Prior art keywords
particle
light beam
light
particle measuring
measuring chamber
Prior art date
Application number
PCT/EP2017/078346
Other languages
German (de)
English (en)
Inventor
Karl Stengel
Gerhard Haaga
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2018095719A1 publication Critical patent/WO2018095719A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means
    • G01N15/0211—Investigating a scatter or diffraction pattern
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution

Definitions

  • the present invention relates to a particle measuring device and a method for determining a particle size of particles in an aerosol.
  • the document DE 10 2005 006 368 AI discloses a device for
  • an opacimeter is proposed in particular.
  • the device is permanently installed adjacent to the exhaust line of the vehicle.
  • the present invention provides a particle measuring device according to independent claim 1 and a method for determining a particle size according to independent claim 8.
  • a particle measuring device having a particle measuring chamber, a first light source, a second light source, a light sensor and a
  • the particle measuring chamber is permeated by an aerosol.
  • the first light source is designed to emit a first light beam having a first wavelength in the direction of the particle measuring chamber.
  • the second light source is designed to emit a second light beam having a second wavelength in the direction of the particle measuring chamber.
  • the first wavelength of the first light beam is different from the second wavelength of the second light beam.
  • the light sensor is designed to transmit the portion of the first light beam transmitted through the particle measurement chamber and the portion of the second component that transmits through the particle measurement chamber
  • the light sensor is further configured to be at an intensity of the detected transmitted portion of the first light beam
  • Light sensor configured to provide a corresponding to an intensity of the detected transmitted portion of the second light beam second output signal.
  • the evaluation device is designed to determine and output a quantity corresponding to a particle size of particles in the aerosol based on the first output signal and the second output signal of the light sensor.
  • a method for determining a particle size of particles in an aerosol comprising the steps of emitting a first light beam having a first wavelength through an aerosol flowed through
  • Particle measuring chamber detecting a first intensity of a through
  • Particle measuring chamber transmitted portion of the first light beam
  • Emitting a second light beam having a second wavelength through the particle measuring chamber detecting a second intensity of a through the Particle measuring chamber transmitted portion of the second light beam; and determining an amount corresponding to the particle size of the aerosol based on the detected first intensity and the detected second intensity of the portions of the first and second light beams transmitted through the particle measurement chamber.
  • the present invention is based on the finding that a
  • the present invention is therefore based on the idea to take into account this finding and a simple, inexpensive and robust
  • the present invention is based on the observation that the proportion of the transmitted light varies through a filled with an aerosol particle measuring chamber for different wavelengths of light depending on the variables characterizing the particles. In other words, if a particle measuring chamber is irradiated by light of two wavelengths, the proportion of the transmitted light is different depending on particle size, particle concentration and / or particle mass.
  • the particle measuring device the
  • Evaluation device a memory device.
  • the storage device is designed to store at least one predetermined characteristic curve for the particle size as a function of a ratio of the first output signal of the light sensor to the second output signal of the light sensor.
  • Evaluation device can then be designed to determine the particle size using the stored in the memory device characteristic.
  • characteristic curves which characterize the particle size as a function of a different ratio of the light turbidity through the aerosol in the particle measuring chamber, a value dependent on the particle size of the aerosol can be determined in a simple manner.
  • a plurality of characteristic curves or even multi-dimensional characteristic curves can be stored in the storage device, which specify a determination of the particle size in addition to the ratio of the detected light intensities also as a function of further parameters.
  • the particle measuring device comprises at least one further sensor which is designed to detect a further operating variable.
  • the evaluation device can be designed to handle the
  • the further sensor may for example be a
  • the first light source and / or the second light source comprises a light-emitting diode (LED).
  • LED light-emitting diode
  • Such light-emitting diodes are usually very well suited to emit monochromatic light of a given wavelength.
  • the light-emitting Diodes on a very good efficiency.
  • the wavelengths of the light emitted by the first light source and the second light source may be visible light.
  • at least one of the light sources can emit light in the infrared wavelength range or in the ultraviolet wavelength range.
  • the wavelength of the light beam emitted by the first light source and the light beam emitted by the second light source preferably differ significantly.
  • the first light source can emit light in the blue wavelength range, for example between 400 and 450 nm.
  • the second light source may, for example, emit light in the red wavelength range, for example between 700 and 750 or 800 nm.
  • at least one light source emits, for example, light in the green wavelength range, for example between 500 and 650 nm.
  • the first light source and the second light source each alternately emit a light beam.
  • the emitted from the first light source and the second light source light beams can be synchronized with a suitable synchronization signal.
  • the method includes a step of introducing a calibrated aerosol into the particle measuring chamber.
  • the calibration aerosol includes, for example, particles of a predetermined particle size.
  • the method comprises a step for detecting a first calibration intensity of a portion of the first light beam transmitted through the particle measurement chamber, and detecting a second calibration intensity of a portion of the second light beam transmitted through the particle measurement chamber. Subsequently, the step of determining the particle size of the particles contained in the aerosol can be carried out using the detected first and second calibration intensities.
  • the emission of the first light beam and the detection of the first intensity, as well as the emission of the second light beam and the detection of the second intensity are respectively synchronized with each other.
  • FIG. 1 shows a schematic representation of a particle measuring device according to an embodiment
  • FIG. 2 shows a schematic representation of a flowchart on which a method according to an embodiment is based.
  • FIG. 1 shows a schematic representation of a particle measuring device 1 according to an embodiment.
  • the particle measuring device 1 comprises a particle measuring chamber 20 through which an aerosol can flow.
  • the aerosol which flows through the particle measuring chamber 20 may be a gas or gas mixture in which particles are contained.
  • the aerosol may be the exhaust gases of a vehicle, in particular the exhaust gases of a diesel vehicle.
  • Particle measuring chamber 20 may, for example, one or more
  • Inlet openings 23 and one or more outlet openings 24 include.
  • the embodiment shown here is for illustrative purposes only and is not intended to be limiting of the present invention.
  • the aerosol can are introduced through the inlet opening 23 into the particle measuring chamber 20 and exit through the outlet openings 24 again from the particle measuring chamber 20.
  • the particle measuring chamber 20 can be traversed by a constant volume flow of the aerosol.
  • the particle measuring chamber 20 moreover has at least two
  • the transmissive regions 21 and 22 are preferably arranged on opposite sides of the particle measuring chamber 20.
  • the particle measuring device 1 comprises a first light source 11 and a second light source 12.
  • the first light source 11 is designed to emit a first light beam having a predetermined first wavelength.
  • the first light beam of the first light source 11 is aligned with the light source 11 in the direction of a first transparent region in the particle measuring chamber 20. In particular, the first light beam at the first
  • the intensity of the first light beam is attenuated by the aerosol contained in the particle measuring chamber 20. Particles contained in the aerosol may partially absorb or scatter the first light beam. Therefore, only a part of the first light beam through the
  • Particle measuring chamber 20 transmit through and back out of the
  • Light beam can be detected by a light sensor 30.
  • the light sensor 30 can thereupon correspond to the intensity of the detected portion of the first light beam transmitted through the particle measuring chamber
  • the light sensor is on the side of the particle measuring chamber 20 opposite the first light source 11
  • the particle measuring device 1 comprises a second light source 12, which is designed to emit a second light beam. This second one
  • Light beam has a different wavelength from the first wavelength of the first light beam. Also of the second light source 12th emitted second light beam is, as well as the first light beam, on the
  • Particle measuring chamber 20 directed enters the particle measuring chamber 20 at the first transparent region 21, and the portion of the second light beam transmitted through the particle measuring chamber 20 then exits the interior of the particle measuring chamber 20 again at the second transparent region 21 and then also strikes the light sensor 30.
  • the light sensor 30 is designed to also detect the portion of the second light beam transmitted through the particle measuring chamber 20 and to provide a second output signal corresponding thereto.
  • the first light source 11 and the second light source 12 can be arranged in a common housing.
  • the first light beam and the second light beam can be emitted by a common light source which is designed to emit two light beams with different wavelengths.
  • the wavelengths of the first light beam and / or the second light beam of the first light source 11 and / or the second light source 12 can be adjusted or
  • the first light source 11 and the second light source 12 may be a light emitting diode (LED) or the like.
  • LED light emitting diode
  • separate light-emitting diodes are possible for each of the wavelengths which are emitted by the light sources 11, 12.
  • a so-called multicolor LED is possible, this is a single light-emitting diode, which depending on the control light
  • any other light source allows, which are able to emit light of a given wavelength.
  • a laser light source or the like may be provided.
  • the wavelength of the first light beam and the wavelength of the second light beam can both lie in the range of visible light between 400 and 750 or 400 and 800 nm.
  • the wavelength of the first light beam and / or the wavelength of the second light beam may also be in the infrared light range or in the ultraviolet light range.
  • Wavelength of the second light beam as far apart as possible.
  • the wavelength of the first light beam in the red wavelength range may be between 800 and 700 nm or 800 and 750 nm
  • the wavelength of the second light beam in the blue wavelength range between 400 and 450 nm.
  • any other wavelengths in particular wavelengths with a significant difference between the first
  • Wavelength and the second wavelength possible.
  • the first light beam and the second light beam can be emitted alternately, for example by the respective light sources 11, 12, so that in each case only light of the first wavelength or only light of the second
  • Wavelength transmitted through the particle measuring chamber 20 The emission of the first light beam and of the second light beam by the first light source or the second light source and the detection of the particles of the light beams transmitted through the particle measurement chamber 20 by the light sensor 30 can be synchronized with each other by means of a suitable synchronization signal.
  • the first light source 11 and the second light source 12 may receive a corresponding drive signal from the evaluation device 40 and then emit the first light beam or the second light beam, respectively.
  • the evaluation device 40 can then the size of the first
  • the evaluation device 40 may then be a measure of the particle size in the by the
  • the evaluation device 40 can calculate, for example, the ratio of the first output signal to the second output signal and adjust this calculated ratio with a previously determined characteristic curve.
  • a previously determined characteristic can, for example, in a
  • Memory device of the evaluation device 40 may be stored in the form of a lookup table or the like.
  • a corresponding particle size can be stored in the storage device of the evaluation device 40 for a multiplicity of different ratios.
  • the relationship between the ratio of the output signals from the light sensor 30 and the corresponding particle size may also be referred to as
  • Particle measuring device perform a calibration.
  • an aerosol with particles of a predetermined size and optionally also other predetermined parameters, such as a known concentration of particles and / or a known particle mass in the particle measuring chamber 20 are eiaught.
  • the intensity of the transmitting portion of the first light beam and the second light beam can be detected for this calibration aerosol. Based on these detected intensities and the output signals corresponding thereto by the light sensor 30, the measurements can then be taken during measurements of unknown aerosols
  • Particle properties in the unknown aerosol deviate upwards or downwards from the particle properties of the calibrated aerosol.
  • the particle measuring device 1 may additionally comprise one or more further sensors 50 for detecting further operating variables.
  • the particle measuring device 1 may include a pressure sensor, which detects the pressure of the aerosol in the particle measuring chamber 20 and provides the evaluation device 40.
  • the particle measuring device 1 also include a temperature sensor that detects the temperature of the aerosol in the particle measuring chamber 20, at the inlet openings 23 and / or the outlet opening or openings of the particle measuring chamber 20.
  • the particle measuring device 1 can also comprise a volume flow sensor which detects the volume flow of the aerosol flowing through the particle measuring chamber 20 and has a corresponding size on the aerosol
  • Evaluation device 40 provides. Further sensors for detecting operating variables of the particle measuring device 1 are also possible.
  • this information can also be included in the determination of the particle size. For example, several calibration operations for variations of these further operating variables can be performed. Additionally or alternatively, also for variations of the operating variables several
  • Characteristics or characteristic fields are stored. In this way, in each case the determination of the particle size in the aerosol can be adapted depending on the current operating variable such as temperature, pressure or volume flow.
  • the evaluation device 40 may infer the particle size of the particles in the aerosol in the particle measurement chamber 20 based on the ratio of the intensity of the transmitted portion of the first light beam to the intensity of the transmitted portion of the second light beam.
  • This particle size is usually an average mean particle size, as the aerosol may also contain particles of different sizes.
  • the determined data on particle size, particle concentration and / or particle mass can then, for example, at an interface in digital or analogous form. Furthermore, the evaluation device 40 can also display the determined data such as particle size, particle concentration or particle mass on a display device (not shown) or store the data in a further memory for subsequent further processing.
  • FIG. 2 shows a schematic representation of a flow chart as it is based on a method for determining a particle size of particles in an aerosol according to an embodiment.
  • a first light beam is emitted at a first wavelength, which radiates through a particle chamber through which an aerosol flows.
  • a first intensity of a through the particle measuring chamber 20th is a first intensity of a through the particle measuring chamber 20th
  • step S3 a second light beam having a second wavelength is emitted. This second light beam also penetrates through the aerosol
  • step S4 a second intensity of the portion of the second light beam transmitted through the particle measuring chamber 20 is detected.
  • the emission and detection of the first light beam or of the second light beam can take place, for example, alternately.
  • the emission of the respective light beam and the detection of the intensity can be synchronized with each other.
  • step S5 a particle to the particle size of the particles contained in the aerosol is calculated.
  • the calculation of the particle size is carried out based on the detected intensity of the transmitting portion of the first light beam and the detected intensity of the transmissive through the particle measuring chamber portion of the second light beam.
  • the ratio of the two intensities formed during the measurement can be set to a ratio of the intensities which occurs during a calibration procedure with a calibration aerosol.
  • Calibrated aerosol may comprise particles of a known particle size, a known particle concentration and / or a known particle mass.
  • the present invention relates to the determination of
  • Particle properties in an aerosol by means of a transmitted light method For this purpose, a particle filled with an aerosol particle measuring chamber is illuminated with two light beams of different wavelengths. From the ratio of the intensities of the transmissive components of the two light beams with different
  • Wavelengths can then be made to draw conclusions about the properties of the particles in the aerosol.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne la détermination de propriétés de particules dans un aérosol par un procédé en lumière transmise. À cet effet, une chambre de mesure de particules remplie d'un aérosol est éclairée en lumière transmise par deux faisceaux lumineux de longueur d'onde différente. À partir du rapport entre les intensités des fractions de transmission des deux faisceaux lumineux ayant des longueurs d'onde différentes, on peut déduire les propriétés des particules dans l'aérosol.
PCT/EP2017/078346 2016-11-25 2017-11-06 Dispositif de mesure de particules et procédé pour déterminer une grandeur de particules WO2018095719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016223424.2A DE102016223424A1 (de) 2016-11-25 2016-11-25 Partikelmessvorrichtung und Verfahren zur Bestimmung einer Partikelgröße
DE102016223424.2 2016-11-25

Publications (1)

Publication Number Publication Date
WO2018095719A1 true WO2018095719A1 (fr) 2018-05-31

Family

ID=60262930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/078346 WO2018095719A1 (fr) 2016-11-25 2017-11-06 Dispositif de mesure de particules et procédé pour déterminer une grandeur de particules

Country Status (2)

Country Link
DE (1) DE102016223424A1 (fr)
WO (1) WO2018095719A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112213263A (zh) * 2019-07-11 2021-01-12 马勒国际有限公司 用于识别储罐或测量单元中的制冷剂流体的装置和方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006368A1 (de) 2005-02-11 2006-08-24 Siemens Ag Vorrichtung zur Abgas-Trübungsmessung als On-Board-Diagnose von Dieselrußfiltern in Kraftfahrzeugen
WO2011050932A1 (fr) * 2009-11-02 2011-05-05 Maha Maschinenbau Haldenwang Gmbh & Co. Kg Appareil de mesure servant à la mesure, dans un gaz d'échappement, de concentrations en masse de particules dans un gaz à mesurer, en particulier dans un gaz d'échappement de combustion
WO2014206747A1 (fr) * 2013-06-24 2014-12-31 Siemens Aktiengesellschaft Détecteur de particules et procédé de détection de particules
EP2848913A1 (fr) * 2013-09-12 2015-03-18 Siemens Schweiz AG Appareil de détection pour la détermination de particules fines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006368A1 (de) 2005-02-11 2006-08-24 Siemens Ag Vorrichtung zur Abgas-Trübungsmessung als On-Board-Diagnose von Dieselrußfiltern in Kraftfahrzeugen
WO2011050932A1 (fr) * 2009-11-02 2011-05-05 Maha Maschinenbau Haldenwang Gmbh & Co. Kg Appareil de mesure servant à la mesure, dans un gaz d'échappement, de concentrations en masse de particules dans un gaz à mesurer, en particulier dans un gaz d'échappement de combustion
WO2014206747A1 (fr) * 2013-06-24 2014-12-31 Siemens Aktiengesellschaft Détecteur de particules et procédé de détection de particules
EP2848913A1 (fr) * 2013-09-12 2015-03-18 Siemens Schweiz AG Appareil de détection pour la détermination de particules fines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112213263A (zh) * 2019-07-11 2021-01-12 马勒国际有限公司 用于识别储罐或测量单元中的制冷剂流体的装置和方法

Also Published As

Publication number Publication date
DE102016223424A1 (de) 2018-05-30

Similar Documents

Publication Publication Date Title
EP0739480B1 (fr) Dispositif de determination de la densite et de la concentration de constituants visibles de fluides
DE4320943A1 (de) Verfahren und Meßanordnung zur simultanen Messung verschiedener Größen im Brennraum von Verbrennungsmotoren mittels Laser Ramanstreuung zur Charakterisierung der Arbeitsweise dieser Motoren
EP2748589B1 (fr) Méthode pour déterminer la pureté d'un réfrigérant
DE3240559C2 (de) Verfahren zur kontinuierlichen Messung der Masse von Aerosolteilchen in gasförmigen Proben sowie Vorrichtung zur Durchführung des Verfahrens
DE10325537B4 (de) Vorrichtung und Verfahren zum automatischen Detektieren von wenigstens einem in einem flüssigen Betriebsstoff enthaltenen fluoreszierenden und/oder lichtabsorbierenden Indikator während des Einfüllvorgangs des Betriebsstoffs in eine Maschine
WO2011050932A1 (fr) Appareil de mesure servant à la mesure, dans un gaz d'échappement, de concentrations en masse de particules dans un gaz à mesurer, en particulier dans un gaz d'échappement de combustion
AT513863A1 (de) Verfahren und Vorrichtung zur Bestimmung einer Konzentration einer fluoreszierenden Substanz in einem Medium
WO2018095719A1 (fr) Dispositif de mesure de particules et procédé pour déterminer une grandeur de particules
DE102006010100B4 (de) Vorrichtung und Verfahren zur spektroskopischen Messung
DE102011103253B4 (de) Anordnung zur optischen Bestimmung einer Probe und entsprechendes Verfahren
EP3158322B1 (fr) Dispositif et procédé pour le calibrage d'un dispositif de mesure de diffusion
DE102008019756A1 (de) Verfahren zur simultanen Messung von Geschwindigkeits- und Zustandsparameterfeldern in einer Fluidströmung
WO2018095733A1 (fr) Dispositif de mesure de particules et procédé pour déterminer des grandeurs caractéristiques d'un aérosol
WO2003069316A1 (fr) Procede de mesure spectroscopique rapide de la concentration, de la temperature et de la pression d'eau gazeuse
EP0632263B1 (fr) Procédé pour examiner un gas
AT515495B1 (de) Verfahren und Vorrichtung zur Bestimmung einer Partikelkonzentration eines mit Partikel geladenen Messgases
DE102016217948A1 (de) Verfahren zur Prognose der Qualität von Klebverbindungen
EP1923694B1 (fr) Methode et dispositif pour déterminer la quantité d'huile dans un flux de gaz
EP3816609A1 (fr) Dispositif et procédé de détection à distance d'un gaz cible
DE102015215411A1 (de) Verfahren zur Messung der Konzentration einer Gaskomponente in einem Messgas
AT518433B1 (de) Spektrometer und Verfahren zur Untersuchung der Inhaltsstoffe eines Fluids
DE3720977C2 (fr)
EP2827129A1 (fr) Procédé destiné au calibrage d'un appareil de mesure à lumière diffusée
DE102009025183B4 (de) Verfahren und Vorrichtung zur Bestimmung der Staub- und Rußpartikelkonzentration
AT520428B1 (de) Verfahren und Vorrichtung zur Messung eines in einem Rohgas

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17794324

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17794324

Country of ref document: EP

Kind code of ref document: A1