FR2416466A1 - LIGHT ABSORPTION MEASUREMENT METHOD OF THE QUANTITY OF A SUBSTANCE IN A MATERIAL, IN THE PRESENCE OF AN IMPURITY - Google Patents
LIGHT ABSORPTION MEASUREMENT METHOD OF THE QUANTITY OF A SUBSTANCE IN A MATERIAL, IN THE PRESENCE OF AN IMPURITYInfo
- Publication number
- FR2416466A1 FR2416466A1 FR7901523A FR7901523A FR2416466A1 FR 2416466 A1 FR2416466 A1 FR 2416466A1 FR 7901523 A FR7901523 A FR 7901523A FR 7901523 A FR7901523 A FR 7901523A FR 2416466 A1 FR2416466 A1 FR 2416466A1
- Authority
- FR
- France
- Prior art keywords
- substance
- impurity
- absorption band
- band
- measurement method
- 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.)
- Granted
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
L'invention concerne un procédé de mesure d'une quantité de substance associée à une matière en présence d'une impureté. Elle se rapporte à un procédé qui comprend la direction sur la matière de radiations comprises dans une première bande de longueurs d'onde qui se trouve en dehors d'une bande d'absorption de la substance mais dans une bande d'absorption de l'impureté, et de radiations d'une seconde bande de longueurs d'onde qui se trouve dans une bande d'absorption de la substance et dans une bande d'absorption de l'impureté. Deux signaux électriques sont formés en fonction des radiations reçues dans les deux bandes de longueurs d'onde et leur soustraction donne un signal représentatif de la quantité cherchée de la substance. Application à la détermination de la quantité d'eau présente dans une feuille de papier.A method of measuring a quantity of substance associated with a material in the presence of an impurity is provided. It relates to a method which comprises directing radiation within a first band of wavelengths which lies outside an absorption band of the substance but within an absorption band of the substance over the material. impurity, and radiation of a second band of wavelengths which is in an absorption band of the substance and in an absorption band of the impurity. Two electrical signals are formed as a function of the radiations received in the two wavelength bands and their subtraction gives a signal representative of the sought quantity of the substance. Application to the determination of the quantity of water present in a sheet of paper.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87477778A | 1978-02-03 | 1978-02-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2416466A1 true FR2416466A1 (en) | 1979-08-31 |
FR2416466B1 FR2416466B1 (en) | 1983-06-24 |
Family
ID=25364556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7901523A Granted FR2416466A1 (en) | 1978-02-03 | 1979-01-22 | LIGHT ABSORPTION MEASUREMENT METHOD OF THE QUANTITY OF A SUBSTANCE IN A MATERIAL, IN THE PRESENCE OF AN IMPURITY |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS54114294A (en) |
CA (1) | CA1102579A (en) |
FR (1) | FR2416466A1 (en) |
GB (1) | GB2013881B (en) |
SE (1) | SE7900926L (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4602160A (en) * | 1983-09-28 | 1986-07-22 | Sentrol Systems Ltd. | Infrared constituent analyzer and control system |
JPS6242035A (en) * | 1985-08-19 | 1987-02-24 | Yunisoku:Kk | Drying degree detecting device for leaf tobacco |
JPH0372346U (en) * | 1989-11-20 | 1991-07-22 | ||
DE19520035C1 (en) * | 1995-03-31 | 1996-11-07 | Gta Sensorik Gmbh | Contactless measurement of surface moisture of objects |
JP2014016373A (en) * | 2013-10-30 | 2014-01-30 | Fujifilm Corp | Method of measuring component amount in coating film |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3614450A (en) * | 1969-02-17 | 1971-10-19 | Measurex Corp | Apparatus for measuring the amount of a substance that is associated with a base material |
FR2205195A5 (en) * | 1972-10-27 | 1974-05-24 | Measurex Corp | |
US3851175A (en) * | 1972-10-27 | 1974-11-26 | Measurex Corp | Moisture gauge with opacity type compensation |
FR2314493A1 (en) * | 1975-06-12 | 1977-01-07 | Measurex Corp | METHOD AND APPARATUS FOR MEASURING THE QUANTITY OF A FOREIGN MATERIAL SUCH AS WATER CARRIED BY A SHEET |
-
1979
- 1979-01-09 GB GB7900768A patent/GB2013881B/en not_active Expired
- 1979-01-22 FR FR7901523A patent/FR2416466A1/en active Granted
- 1979-01-22 CA CA320,074A patent/CA1102579A/en not_active Expired
- 1979-02-02 SE SE7900926A patent/SE7900926L/en not_active Application Discontinuation
- 1979-02-02 JP JP1133179A patent/JPS54114294A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3614450A (en) * | 1969-02-17 | 1971-10-19 | Measurex Corp | Apparatus for measuring the amount of a substance that is associated with a base material |
FR2205195A5 (en) * | 1972-10-27 | 1974-05-24 | Measurex Corp | |
US3851175A (en) * | 1972-10-27 | 1974-11-26 | Measurex Corp | Moisture gauge with opacity type compensation |
FR2314493A1 (en) * | 1975-06-12 | 1977-01-07 | Measurex Corp | METHOD AND APPARATUS FOR MEASURING THE QUANTITY OF A FOREIGN MATERIAL SUCH AS WATER CARRIED BY A SHEET |
US4006358A (en) * | 1975-06-12 | 1977-02-01 | Measurex Corporation | Method and apparatus for measuring the amount of moisture that is associated with a web of moving material |
Also Published As
Publication number | Publication date |
---|---|
SE7900926L (en) | 1979-08-04 |
GB2013881A (en) | 1979-08-15 |
GB2013881B (en) | 1982-06-16 |
CA1102579A (en) | 1981-06-09 |
FR2416466B1 (en) | 1983-06-24 |
JPS54114294A (en) | 1979-09-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |