FR2512196A1 - LENGTH MEASURING APPARATUS FOR PAPER FIBERS - Google Patents

LENGTH MEASURING APPARATUS FOR PAPER FIBERS Download PDF

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Publication number
FR2512196A1
FR2512196A1 FR8214639A FR8214639A FR2512196A1 FR 2512196 A1 FR2512196 A1 FR 2512196A1 FR 8214639 A FR8214639 A FR 8214639A FR 8214639 A FR8214639 A FR 8214639A FR 2512196 A1 FR2512196 A1 FR 2512196A1
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FR
France
Prior art keywords
length
capillary tube
fiber
fibers
light source
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
Application number
FR8214639A
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French (fr)
Other versions
FR2512196B3 (en
Inventor
Tapio Makkonen
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.)
Kajaani Oy
Original Assignee
Kajaani Oy
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 Kajaani Oy filed Critical Kajaani Oy
Publication of FR2512196A1 publication Critical patent/FR2512196A1/en
Application granted granted Critical
Publication of FR2512196B3 publication Critical patent/FR2512196B3/fr
Granted legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/34—Paper
    • G01N33/343—Paper pulp
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • 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

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A length meter for paper fibres (2) consisting of a capillary tube (1), running through which are guided the fibres to be measured, which are embedded in a liquid, and in which a light source (3) is located on one side of the capillary tube and there is provided on the opposite side thereof a photocell from the results of which the fibre lengths can be determined. The photocell (4) consists of a diode matrix, having diodes (5, 11) which calculate the length of the fibre from the passing image of the fibre (2).

Description

Appareil de mesure de longueur pour fibres papetieres.Length measuring device for paper fibers.

La présente invention concerne un appareil de mesure de la longueur des fibres papetières constitué par un tube capillaire à travers lequel sont amenées à passer les fibres a mesurer noyées dans un liquide, une source lumineuse étant disposée sur un côté du tube capillaire et une cellule photo-électrique sur le côté opposé dudit tube capillaire, les longueurs des fibres etant déterminables d'après le débit de cette cellule.The present invention relates to an apparatus for measuring the length of paper fibers consisting of a capillary tube through which the fibers to be measured are passed embedded in a liquid, a light source being arranged on one side of the capillary tube and a photo cell. -electric on the opposite side of said capillary tube, the lengths of the fibers being determinable according to the flow rate of this cell.

L'invention-assure une procédure plus précise pour la mesure de la longueur des fibres que celles utilisées Jusqu'ici.The invention provides a more precise procedure for measuring the length of the fibers than those used up to now.

L'appareil de mesure de la longueur objet de l'invention est caractérisé en ce que la cellule photo-electrique est constituée par une matrice de diodes, les diodes de cette matrice calculant la longueur de la fibre d'après l'image de la fibre qui passe devant elles. A l'aide de l'invention on obtient une longueur hautement précise et sûre pour la fibre parce que la fibre passante cache, en un certain point, une partie des diodes, la longueur de la fibre pouvant être lue immédia tement sur un affichage qui constitue une partie de l'appareil de mesure de la longueur.The length measuring device object of the invention is characterized in that the photoelectric cell consists of a matrix of diodes, the diodes of this matrix calculating the length of the fiber from the image of the fiber passing in front of them. With the aid of the invention a highly precise and safe length for the fiber is obtained because the pass-through fiber hides, at a certain point, part of the diodes, the length of the fiber being able to be read immediately on a display which is part of the length measuring device.

Un mode de réalisation avantageux de l'invention est caractérisé en ce que des polariseurs croisés sont disposés entre la source lumineuse et la matrice de diodes. Avec ce moyen on peut faire en sorte que l'appareil enregistrera seulement les fibres et non d'autres objets étrangers tels que des bulles d'air par exemple.An advantageous embodiment of the invention is characterized in that crossed polarizers are arranged between the light source and the diode array. With this means we can ensure that the device will only record fibers and not other foreign objects such as air bubbles for example.

L'invention est décrite ci-après sous forme d'un exemple avec référence au dessin ci-annexé qui représente d'une manière simplifiée l'appareil de mesure de longueur
L'appareil de mesure de longueur comporte un tube capillaire 1 à travers lequel les fibres 2 mesurer, noyées dans un liquide, sont amenées à passer. Sur un côté du tube capillaire 1 est disposée une source de lumière 3 et, sur le coté opposé du tube capillaire, une cellule photo-électrique 4. La cellule photo-électrique 4 est constituée par une matrice de diodes dont les diodes 5 calculent la longueur de l'image, à partir de l'image de la fibre 2 qui passe devant la cellule.The invention is described below in the form of an example with reference to the accompanying drawing which shows in a simplified manner the length measuring apparatus.
The length measuring device comprises a capillary tube 1 through which the fibers 2 to be measured, embedded in a liquid, are brought to pass. On one side of the capillary tube 1 is disposed a light source 3 and, on the opposite side of the capillary tube, a photoelectric cell 4. The photoelectric cell 4 is constituted by a matrix of diodes whose diodes 5 calculate the length of the image, from the image of fiber 2 passing in front of the cell.

Entre la source lumineuse 3 et la matrice de diodes ont été prévus des polariseurs 6,7.Between the light source 3 and the diode array are provided polarizers 6,7.

Les fibres 2 sont amenées à passer dans le tube capillaire 1 en descendant depuis le haut, selon la direction indiquée par la flèche 8. A l'aide de la source lumineuse 3 et des lentilles 6, 7, 9, 10 une image mobile ayant la même forme que la fibre est obtenue sur la matrice de diodes 4. Lorsque l'ex trémité inférieure de l'image atteint la diode Il la plus basse de la matrice de diodes, l'image recouvre un certain nombre de diodes 5 en montant à partir de celle-ci et de ce fait la longueur de la fibre peut être lue immédiatement par des moyens connus en eux-mêmes.The fibers 2 are caused to pass into the capillary tube 1 down from the top, in the direction indicated by the arrow 8. With the light source 3 and the lenses 6, 7, 9, 10 a moving image having the same shape as the fiber is obtained on the diode array 4. When the lower end of the image reaches the lowest diode II of the diode array, the image covers a certain number of diodes 5 while rising from this and therefore the length of the fiber can be read immediately by means known in themselves.

Il est évident pour l'homme de métier que différents modes de réalisation de l'invention sont possibles sans sortir du cadre de celle-ci tel que défini par les revendications ci- après. It is obvious to those skilled in the art that different embodiments of the invention are possible without departing from the scope thereof as defined by the claims below.

Claims (2)

RevendicationsClaims 1. Un appareil de mesure de la longueur des fibres papetières (2) comportant un tube capillaire (1) à travers lequel sont amenées à passer les fibres à mesurer noyées dans un liquide, une source lumineuse (3) étant disposé sur un côté du tube capillaire et une cellule photo-électrique (4) sur le cdté opposé dudit tube capillaire, caractérisé en ce que la cellule photo-electrique (4) est constituée par une matrice de diodes dont les diodes (5, 11) calculent la longueur de la fibre d'après l'image de la fibre (2) qui passe devant elles.1. An apparatus for measuring the length of paper fibers (2) comprising a capillary tube (1) through which the fibers to be measured are passed embedded in a liquid, a light source (3) being arranged on one side of the capillary tube and a photoelectric cell (4) on the opposite side of said capillary tube, characterized in that the photoelectric cell (4) is constituted by a matrix of diodes whose diodes (5, 11) calculate the length of the fiber from the image of the fiber (2) passing in front of them. 2. Un appareil de mesure de la longueur selon la revendication 1, caractérisé en ce que, entre la source lumineuse (3) et la matrice de diodes (4) sont montés des polariseurs croises(6,7). 2. A length measuring device according to claim 1, characterized in that, between the light source (3) and the diode array (4) are mounted cross polarizers (6,7).
FR8214639A 1981-08-26 1982-08-26 LENGTH MEASURING APPARATUS FOR PAPER FIBERS Granted FR2512196A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI812627A FI812627L (en) 1981-08-26 1981-08-26 LAENGDMAETARE FOER PAPPERSFIBER

Publications (2)

Publication Number Publication Date
FR2512196A1 true FR2512196A1 (en) 1983-03-04
FR2512196B3 FR2512196B3 (en) 1984-10-26

Family

ID=8514655

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8214639A Granted FR2512196A1 (en) 1981-08-26 1982-08-26 LENGTH MEASURING APPARATUS FOR PAPER FIBERS

Country Status (6)

Country Link
JP (1) JPS5852505A (en)
CA (1) CA1176839A (en)
DE (1) DE3230523A1 (en)
FI (1) FI812627L (en)
FR (1) FR2512196A1 (en)
SE (1) SE8204869L (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160304A2 (en) * 1984-05-01 1985-11-06 Kanzaki Paper Manufacturing Company Limited Method and apparatus for measuring the fiber orientation of papers
EP0467127A2 (en) * 1990-07-16 1992-01-22 Gerhart Schroff Method and device for optically detecting and evaluating scattered light signals
FR2681693A1 (en) * 1991-09-24 1993-03-26 Barrat Bertrand DEVICE FOR DIMENSIONAL ANALYSIS OF PARTICLES POSITIONED IN A PLANE.
EP0549895A1 (en) * 1991-12-31 1993-07-07 Andritz Sprout-Bauer, Inc. Fiber Length Analyzer
WO2004092677A1 (en) * 2003-04-17 2004-10-28 Commonwealth Scientific And Industrial Research Organisation Method and apparatus for testing fibres
AU2004231118B2 (en) * 2003-04-17 2009-09-17 Commonwealth Scientific And Industrial Research Organisation Method and apparatus for testing fibres

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59114445A (en) * 1982-12-21 1984-07-02 Yamamura Glass Kk Apparatus for detecting defect of transparent body
DE3502406C2 (en) * 1985-01-22 1987-04-23 Dr. Peter + Steinwender Technische Geräte GmbH, 8176 Waakirchen Method and device for the continuous, contactless determination of the length of an undivided, moving body
US4837446A (en) * 1988-03-31 1989-06-06 International Paper Company Apparatus and process for testing uniformity of pulp
US5311290A (en) * 1992-09-30 1994-05-10 Pulp And Paper Research Institute Of Canada Imaging apparatus and method of fiber analysis
DE19802315A1 (en) * 1998-01-22 1999-07-29 Rieter Ag Maschf Method of measuring fibre lengths
US6407819B1 (en) 1998-01-22 2002-06-18 Maschinenfabrik Rieter Ag Method and device for measuring fibre length
US8120769B2 (en) 2007-08-03 2012-02-21 North Carolina State University Method and system for fiber properties measurement

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160304A2 (en) * 1984-05-01 1985-11-06 Kanzaki Paper Manufacturing Company Limited Method and apparatus for measuring the fiber orientation of papers
EP0160304A3 (en) * 1984-05-01 1987-03-18 Kanzaki Paper Manufacturing Company Limited Method and apparatus for measuring the fiber orientation of papers
EP0467127A2 (en) * 1990-07-16 1992-01-22 Gerhart Schroff Method and device for optically detecting and evaluating scattered light signals
EP0467127A3 (en) * 1990-07-16 1992-09-30 Gerhart Schroff Method and device for optically detecting and evaluating scattered light signals
FR2681693A1 (en) * 1991-09-24 1993-03-26 Barrat Bertrand DEVICE FOR DIMENSIONAL ANALYSIS OF PARTICLES POSITIONED IN A PLANE.
WO1993006454A2 (en) * 1991-09-24 1993-04-01 Ateliers Thomasset S.A. Device for dimensional analysis of particles positioned in a plane
WO1993006454A3 (en) * 1991-09-24 1993-05-13 Thomasset S A Atel Device for dimensional analysis of particles positioned in a plane
EP0549895A1 (en) * 1991-12-31 1993-07-07 Andritz Sprout-Bauer, Inc. Fiber Length Analyzer
US5293219A (en) * 1991-12-31 1994-03-08 Andritz Sprout-Bauer, Inc. Fiber length analyzer
WO2004092677A1 (en) * 2003-04-17 2004-10-28 Commonwealth Scientific And Industrial Research Organisation Method and apparatus for testing fibres
AU2004231118B2 (en) * 2003-04-17 2009-09-17 Commonwealth Scientific And Industrial Research Organisation Method and apparatus for testing fibres
US7729517B2 (en) 2003-04-17 2010-06-01 Commonwealth Scientific And Industrial Research Organisation Method and apparatus for testing fibres

Also Published As

Publication number Publication date
CA1176839A (en) 1984-10-30
SE8204869L (en) 1983-02-27
JPS5852505A (en) 1983-03-28
SE8204869D0 (en) 1982-08-25
FR2512196B3 (en) 1984-10-26
FI812627L (en) 1983-02-27
DE3230523A1 (en) 1983-03-17

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