Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020088843 - OPTICAL PARTICLE SENSOR, IN PARTICULAR EXHAUST GAS SENSOR

Publication Number WO/2020/088843
Publication Date 07.05.2020
International Application No. PCT/EP2019/075369
International Filing Date 20.09.2019
IPC
G01N 15/02 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
02Investigating particle size or size distribution
G01N 15/14 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
10Investigating individual particles
14Electro-optical investigation
G01N 21/71 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71thermally excited
G01N 21/85 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
85Investigating moving fluids or granular solids
CPC
G01N 15/0205
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
02Investigating particle size or size distribution
0205by optical means, e.g. by light scattering, diffraction, holography or imaging
G01N 15/1459
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
10Investigating individual particles
14Electro-optical investigation, e.g. flow cytometers
1456without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals
1459the analysis being performed on a sample stream
G01N 21/71
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71thermally excited
G01N 21/85
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
85Investigating moving fluids or granular solids
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • BAARS, Enno
  • BUCHHOLZ, Martin
  • RUSANOV, Radoslav
  • WEBER, Johannes
Priority Data
10 2018 218 734.731.10.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) OPTISCHER PARTIKELSENSOR, INSBESONDERE ABGASSENSOR
(EN) OPTICAL PARTICLE SENSOR, IN PARTICULAR EXHAUST GAS SENSOR
(FR) CAPTEUR OPTIQUE DE PARTICULES, EN PARTICULIER CAPTEUR DE GAZ D’ÉCHAPPEMENT
Abstract
(DE)
Partikelsensor zum Nachweis von Partikeln in einer Strömung eines Messgases, insbesondere zum Nachweis von Rußpartikeln in einem Abgaskanal eines Brenners oder einer Brennkraftmaschine, mit Mitteln zur Erzeugung oder zur Zuführung von Laserlicht (10) und mit Mitteln zur Fokussierung von Laserlicht (10) und mit Mitteln zur Detektion oder zur Weiterleitung von Temperaturstrahlung, wobei der Partikelsensor (16) zumindest einen optischen Zugang (40) aufweist, der einen dem Messgas ausgesetzten Bereich (16.1) von einem dem Messgas abgewandten Bereich (16.2), der nicht dem Messgas ausgesetzt ist, trennt, wobei die Mittel zur Erzeugung oder zur Zuführung von Laserlicht (10) und/oder die Mittel zur Detektion oder zur Weiterleitung von Temperaturstrahlung in dem dem Messgas abgewandten Bereich (16.2) angeordnet sind, dadurch gekennzeichnet, dass der Partikelsensor (16) der Messgasströmung eine Teilströmung (321) entnimmt und dem Laserfokus (22) zuführt und ferner den optischen Zugang (40) gegenüber der Teilströmung (321) fluidisch abschirmt.
(EN)
The invention relates to a particle sensor for detecting particles in the flow of a measurement gas, in particular in order to detect soot particles in the exhaust gas channel of a burner or an internal combustion engine, comprising means for generating or supplying laser light (10), means for focusing the laser light (10), and means for detecting or transferring thermal radiation, wherein the particle sensor (16) has at least one optical entrance (40) which separates a region (16.1) exposed to the measurement gas from a region (16.2) which faces away from the measurement gas and is not exposed to the measurement gas, and the means for generating or supplying laser light (10) and/or the means for detecting or transferring thermal radiation is arranged in the region (16.2) facing away from the measurement gas. The invention is characterized in that the particle sensor (16) removes a sub-flow (321) from the flow of measurement gas and supplies same to the laser focus (22), and additionally the optical entrance (40) is fluidically shielded from the sub-flow (321).
(FR)
L’invention concerne un capteur de particules permettant de détecter des particules dans un flux d'un gaz de mesure, en particulier de détecter des particules de suie dans un conduit de gaz d’échappement d’un chalumeau ou d’un moteur à combustion interne. Le capteur de particules comporte des moyens de génération ou d’application de lumière laser (10), des moyens de focalisation de lumière laser (10), et des moyens de détection ou de transmission de rayonnement de température, le capteur de particules (16) présentant au moins un accès optique (40), qui sépare une zone (16.1) exposée au gaz de mesure d’une zone (16.2) opposée au gaz de mesure, qui n'est past exposée au gaz de mesure, les moyens de génération ou d’application de lumière laser (10) et/ou les moyens de détection ou de transmission de rayonnement de température étant disposés dans la zone (16.2) opposée au gaz de mesure, caractérisé en ce que le capteur de particules (16) prélève un flux partiel (321) du flux de gaz de mesure, l'amène à la focalisation de laser (22), et, en outre, protège fluidiquement l’accès optique (40) par rapport au flux partiel (321).
Also published as
Latest bibliographic data on file with the International Bureau