FR2180350A5 - Infra red analyser - measures a material property by measuring IR absorb-tion - Google Patents

Infra red analyser - measures a material property by measuring IR absorb-tion

Info

Publication number
FR2180350A5
FR2180350A5 FR7312868A FR7312868A FR2180350A5 FR 2180350 A5 FR2180350 A5 FR 2180350A5 FR 7312868 A FR7312868 A FR 7312868A FR 7312868 A FR7312868 A FR 7312868A FR 2180350 A5 FR2180350 A5 FR 2180350A5
Authority
FR
France
Prior art keywords
rays
property
measuring
tion
absorb
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
Application number
FR7312868A
Other languages
French (fr)
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.)
INFRA SYSTEMS Inc
Original Assignee
INFRA SYSTEMS Inc
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 INFRA SYSTEMS Inc filed Critical INFRA SYSTEMS Inc
Application granted granted Critical
Publication of FR2180350A5 publication Critical patent/FR2180350A5/en
Expired 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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (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

An IR analyser includes an IR source directing (e.g. through respective filters) three rays of different wave length into a material (e.g. paper) of which a property (e.g. humidity content) is to be measured. One of the rays is a measuring ray and is of such a wavelength that its absorption by the material is dependent on the property and the other rays are reference rays and have wavelengths determined by other properties. The parts of the rays not absorbed by the material (e.g. the reflected parts) are collected by pref. a common sensor which provides corresponding output signals which are added by a control circuit, and the sum of the output signals is divided by the output signal corresponding to the reference ray to provide a ratio signal which determines the value of the property being measured.
FR7312868A 1972-04-10 1973-04-10 Infra red analyser - measures a material property by measuring IR absorb-tion Expired FR2180350A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24273072A 1972-04-10 1972-04-10

Publications (1)

Publication Number Publication Date
FR2180350A5 true FR2180350A5 (en) 1973-11-23

Family

ID=22915960

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7312868A Expired FR2180350A5 (en) 1972-04-10 1973-04-10 Infra red analyser - measures a material property by measuring IR absorb-tion

Country Status (4)

Country Link
JP (1) JPS4910782A (en)
DE (1) DE2318032A1 (en)
FR (1) FR2180350A5 (en)
IT (1) IT982680B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990865A3 (en) * 1998-09-30 2001-12-05 Voith Paper Patent GmbH Measuring system for determining the moisture content of a fibrous web

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949531B2 (en) * 1979-09-10 1984-12-03 富士通株式会社 Water permeability test method
JPS58204336A (en) * 1982-05-25 1983-11-29 Japan Tobacco Inc Moisture measuring device by infrared rays
US4928013A (en) * 1987-02-17 1990-05-22 Measurex Corporation Temperature insensitive moisture sensor
JPH0648244B2 (en) * 1988-10-25 1994-06-22 横河電機株式会社 Infrared moisture meter that reduces the effect of basis weight
JPH04286937A (en) * 1991-03-15 1992-10-12 Shokuhin Sangyo Online Sensor Gijutsu Kenkyu Kumiai Method and apparatus for measuring moisture
US5338361A (en) * 1991-11-04 1994-08-16 Measurex Corporation Multiple coat measurement and control apparatus and method
US5276327A (en) * 1991-12-09 1994-01-04 Measurex Corporation Sensor and method for mesaurement of select components of a material
JP2917895B2 (en) * 1996-03-14 1999-07-12 日本電気株式会社 Electronic equipment with optical communication function
DE19927452C2 (en) * 1999-06-16 2001-05-03 Wilhelm Rapp Device for measuring moisture and reflectivity of surfaces
CA2387822C (en) 1999-10-15 2011-01-04 Cargill, Incorporated Fibers from plant seeds and use
DE102013104846B3 (en) * 2013-05-10 2014-06-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for determining humidity transmissivity of optical coating e.g. inorganic dielectric layer coating, on plastic lens, involves entering beam into substrate at front side of substrate, and reflecting beam at rear part of substrate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990865A3 (en) * 1998-09-30 2001-12-05 Voith Paper Patent GmbH Measuring system for determining the moisture content of a fibrous web

Also Published As

Publication number Publication date
JPS4910782A (en) 1974-01-30
IT982680B (en) 1974-10-21
DE2318032A1 (en) 1973-10-31

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Legal Events

Date Code Title Description
ST Notification of lapse