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1. WO1988008958 - A METHOD AND ARRANGEMENT FOR DETERMINING THE SIZE AND/OR THE SHAPE OF A FREELY FALLING OBJECT

Publication Number WO/1988/008958
Publication Date 17.11.1988
International Application No. PCT/SE1988/000204
International Filing Date 22.04.1988
Chapter 2 Demand Filed 12.12.1988
IPC
G01B 11/00 2006.1
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
G01B 11/02 2006.1
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
02for measuring length, width, or thickness
CPC
G01B 11/00
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
G01B 11/024
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
02for measuring length, width or thickness
024by means of diode-array scanning
Applicants
  • GEDEVELOP ELECTRONICS AB [SE]/[SE] (AllExceptUS)
  • RANSHEIM, Anders [SE]/[SE] (UsOnly)
Inventors
  • RANSHEIM, Anders
Agents
  • CARMINGER, Lars
Priority Data
8701862-806.05.1987SE
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A METHOD AND ARRANGEMENT FOR DETERMINING THE SIZE AND/OR THE SHAPE OF A FREELY FALLING OBJECT
(FR) PROCEDE ET AGENCEMENT PERMETTANT DE DETERMINER LA TAILLE ET/OU LA FORME D'UN OBJET EN CHUTE LIBRE
Abstract
(EN) Disclosed is a method and an arrangement for determining the shape and/or size of a freely falling drop (1) of molten glass. One end of the drop is detected by means of two photo-diodes (7, 8) spaced apart along the fall path for determining the fall speed of the drop. An image of that part of the drop located momentarily between the two photo-diodes (7, 8) is projected onto an elongated photo-diode array (9) extending perpendicularly to the fall direction. The photo-diode array (9) is scanned periodically at a given time interval a large number of times during movement of the drop past the array. This provides information relating to the width of the drop at a large number of locations along the length of the drop. The mutual distance between these width determinations are calculated on the basis of the fall speed of the drop and the time interval between the different scans. The shape and size of the drop is calculated from these data.
(FR) Procédé et agencement permettant de déterminer en chute libre la forme et/ou la taille d'une goutte (1) de verre en fusion. Une extrémité de la goutte est détectée au moyen de deux photo-diodes (7, 8) espacées le long de la trajectoire de chute afin de déterminer la vitesse à laquelle tombe la goutte. Une image de cette partie de la goutte se trouvant momentanément entre les deux photo-diodes (7, 8) est projetée sur un réseau (9) allongé de photo-diodes s'étendant perpendiculairement à la direction de la chute. Le réseau (9) de photo-diodes est périodiquement balayé à un intervalle de temps donné, un grand nombre de fois pendant le mouvement effectué par la goutte lorsqu'elle passe devant le réseau. Ce système offre des informations relatives à la largeur de la goutte à un grand nombre d'endroits situés sur toute la longueur de la goutte. La distance mutuelle entre ces déterminations de largeur est calculée sur la base de la vitesse de chute de la goutte et de l'intervalle de temps entre les différents balayages. La forme et la taille de la goutte sont calculées à partir de ces données.
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