FR2404215A1 - Dispositif de surveillance de la concentration en poussieres d'un aerosol - Google Patents

Dispositif de surveillance de la concentration en poussieres d'un aerosol

Info

Publication number
FR2404215A1
FR2404215A1 FR7819955A FR7819955A FR2404215A1 FR 2404215 A1 FR2404215 A1 FR 2404215A1 FR 7819955 A FR7819955 A FR 7819955A FR 7819955 A FR7819955 A FR 7819955A FR 2404215 A1 FR2404215 A1 FR 2404215A1
Authority
FR
France
Prior art keywords
monitoring
dust
light
photo
detector
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR7819955A
Other languages
English (en)
Inventor
Norman Green
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Publication of FR2404215A1 publication Critical patent/FR2404215A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material 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

Dispositif de surveillance de la concentration de particules de poussière en suspension dans un flux d'air. Dispositif dans lequel le flux d'air chargé de poussières traverse une région située entre deux polariseurs croisés de lumière; de la lumière est dirigée au travers des polariseurs vers un photo-détecteur; en l'absence de particules de poussière, sensiblement aucune lumière n'atteint le photo-détecteur; des particules de poussières dans la région interpolariseur dépolarisent la lumière qui est alors détectée par le photo-détecteur pour procurer une indication de la concentration de particules de poussière. Dispositif applicable à la surveillance de la concentration de particules de poussière de charbon en suspension dans l'air d'une mine de charbon.
FR7819955A 1977-09-26 1978-07-05 Dispositif de surveillance de la concentration en poussieres d'un aerosol Withdrawn FR2404215A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83687177A 1977-09-26 1977-09-26

Publications (1)

Publication Number Publication Date
FR2404215A1 true FR2404215A1 (fr) 1979-04-20

Family

ID=25272936

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819955A Withdrawn FR2404215A1 (fr) 1977-09-26 1978-07-05 Dispositif de surveillance de la concentration en poussieres d'un aerosol

Country Status (4)

Country Link
JP (1) JPS5458078A (fr)
DE (1) DE2830974A1 (fr)
FR (1) FR2404215A1 (fr)
GB (1) GB2005404A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446756C1 (de) * 1984-12-21 1985-10-31 Betz, Michael, Dr., 2300 Molfsee Photometer zum Analysieren fluessiger Medien
JPH0627844B2 (ja) * 1987-05-14 1994-04-13 浜松ホトニクス株式会社 放射線位置検出器
US5912737A (en) * 1998-06-01 1999-06-15 Hach Company System for verifying the calibration of a turbidimeter
CN102353622B (zh) * 2011-07-01 2013-03-27 黑龙江科技学院 一种煤矿井下工作面粉尘浓度的监测及测量方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB715519A (en) * 1952-08-13 1954-09-15 Kidde Walter Co Ltd Method and apparatus for detection of smoke
FR2104804A1 (fr) * 1970-07-24 1972-04-21 Ericsson Telefon Ab L M
GB1305407A (fr) * 1968-11-13 1973-01-31
US3922656A (en) * 1972-12-06 1975-11-25 Cerberus Ag Sensing presence of fire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB715519A (en) * 1952-08-13 1954-09-15 Kidde Walter Co Ltd Method and apparatus for detection of smoke
GB1305407A (fr) * 1968-11-13 1973-01-31
FR2104804A1 (fr) * 1970-07-24 1972-04-21 Ericsson Telefon Ab L M
US3922656A (en) * 1972-12-06 1975-11-25 Cerberus Ag Sensing presence of fire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV59/73 *

Also Published As

Publication number Publication date
JPS5458078A (en) 1979-05-10
DE2830974A1 (de) 1979-04-05
GB2005404A (en) 1979-04-19

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Legal Events

Date Code Title Description
ST Notification of lapse