GB2283316B - Method and apparatus for detecting fibrous particles - Google Patents

Method and apparatus for detecting fibrous particles

Info

Publication number
GB2283316B
GB2283316B GB9421346A GB9421346A GB2283316B GB 2283316 B GB2283316 B GB 2283316B GB 9421346 A GB9421346 A GB 9421346A GB 9421346 A GB9421346 A GB 9421346A GB 2283316 B GB2283316 B GB 2283316B
Authority
GB
United Kingdom
Prior art keywords
fibrous particles
detecting
detecting fibrous
particles
fibrous
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.)
Expired - Lifetime
Application number
GB9421346A
Other versions
GB9421346D0 (en
GB2283316A (en
Inventor
Phillip Edward Harley
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.)
HARLEY SCIENT Ltd
Original Assignee
HARLEY SCIENT Ltd
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 HARLEY SCIENT Ltd filed Critical HARLEY SCIENT Ltd
Publication of GB9421346D0 publication Critical patent/GB9421346D0/en
Publication of GB2283316A publication Critical patent/GB2283316A/en
Application granted granted Critical
Publication of GB2283316B publication Critical patent/GB2283316B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • G01N2021/4704—Angular selective
    • G01N2021/4711—Multiangle measurement
    • 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
    • G01N2021/4704—Angular selective
    • G01N2021/4726—Detecting scatter at 90°
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/061—Sources
    • G01N2201/06113—Coherent sources; lasers
    • G01N2201/0612—Laser diodes

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)
GB9421346A 1993-10-28 1994-10-24 Method and apparatus for detecting fibrous particles Expired - Lifetime GB2283316B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB939322242A GB9322242D0 (en) 1993-10-28 1993-10-28 Fibrous aerosol detector

Publications (3)

Publication Number Publication Date
GB9421346D0 GB9421346D0 (en) 1994-12-07
GB2283316A GB2283316A (en) 1995-05-03
GB2283316B true GB2283316B (en) 1997-04-30

Family

ID=10744263

Family Applications (2)

Application Number Title Priority Date Filing Date
GB939322242A Pending GB9322242D0 (en) 1993-10-28 1993-10-28 Fibrous aerosol detector
GB9421346A Expired - Lifetime GB2283316B (en) 1993-10-28 1994-10-24 Method and apparatus for detecting fibrous particles

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB939322242A Pending GB9322242D0 (en) 1993-10-28 1993-10-28 Fibrous aerosol detector

Country Status (1)

Country Link
GB (2) GB9322242D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2510854B (en) * 2013-02-15 2015-08-05 Univ Hertfordshire Higher Education Corp Improved apparatus and method for detection of asbestos fibres
CN107617299A (en) * 2017-10-31 2018-01-23 湖北力帝机床股份有限公司 Disintegrating machine fire prevention dust pelletizing system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027162A (en) * 1976-04-26 1977-05-31 Particle Measuring Systems, Inc. Method and apparatus for orienting and measuring fibrous particles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027162A (en) * 1976-04-26 1977-05-31 Particle Measuring Systems, Inc. Method and apparatus for orienting and measuring fibrous particles

Also Published As

Publication number Publication date
GB9421346D0 (en) 1994-12-07
GB9322242D0 (en) 1993-12-15
GB2283316A (en) 1995-05-03

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20141023