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Applications industrielles |
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Contrôle de longueur, de vitesse et de ligne de production
NOUVEAU Vélocimètre Compact LSV-1000
Gamme Vélocimètres Polytec
Notes Application
Moyens de détection dans le domaine de l'industrie |
Pour le contrôle en ligne de production, les applications nécessitant une mesure ultra-précise et rapide, Polytec vous propose une nouvelle solution de vélocimétrie. Le LSV-1000 : vélocimètre laser de surface conçu pour des mesures sans contact de vitesse et de longueur. Cet outil efficace et précis s'intègre parfaitement dans vos applications du fait de son design compact et de sa flexibilité. Voici un aperçu des avantages de cette solution :
- Précision, acquisition des données en temps réel
- Technologie fiable et robuste résistante aux températures élevées et aux environnements hostiles (classe protection IP 66 et IP 67)
- En option : système de refroidissement (par eau/huile), ventilation par air comprimé pour éviter les saletés sur la tête optique, housse de protection, ...
- Excellent ROI, maintenance faible, très bonne rentabilité
- Système compact clé en main qui s'intègre facilement sur vos lignes de production (notamment pour les phases de suivi et de controle)
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Coupe à la longueur
Opération en environnements extrèmes |
Mesure de longueur de pièces
Mesure de longueur de pièces : gypse, papier, métal, barre d'acier, ... |
Longueur de bobines
Câble, fil, fibre, tissus, papier, métal |
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Contrôle et mesure de vitesse de défilement
Mesure de vitesse dans un laminoir à chaud / froid |
Mesure de vitesses différentielles
Régulation du Mass Flow dans un laminoir au moyen d'un C de mesure |
Synchronisation de la vitesse
Détection de glissement, synchronisation de la vitesse de rotation, contrôle en ligne sur laminoirs |
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Etalonnage des Encodeurs
Etalonnage des encodeurs sur une ligne de production |
Pilotage du marquage
Marquage en continu sur des lignes de contrôle qualité |
... et plus encore
Plus d'Info · Contact
Avez-vous besoin d'une solution ?
Contactez nous sur smo@polytec.fr ! |
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Copyright 2009 Polytec France. Spécifications techniques sous réserve de changements. |
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LSV Customer Applications
More than 1000 Polytec Laser Surface Velocimeters (LSV) world-wide measure speed and length of moving surfaces with laser precision and without contact on coils, strips, tubes, fiber, film, paper, foil, composite lumber, and almost any other moving materials, including hot steel. Read on about many of our customers' successful LSV applications.
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 LSV display of results |
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Mass Flow Regulation in a Rolling Mill with a C-frame and an integrated LSV
In order to meet the dimensional accuracy and tolerance specified by automotive and industrial consumers, modern rolling mills employ a technique called Automatic Gauge Control (AGC), which utilizes mass flow calculations to meet the precision tolerances on thickness. Due to their high processing speed, Polytec's LSVs offer almost immediate control to thickness variations.
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 C-Frame with integrated LSV |
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Motion Measurement at a Thin Slab Steel Mill
The steel industry needs precise length and velocity measurements from red-hot objects for regulating and controlling production processes. In the thin slab steel mill, a strand of liquid steelis continuously poured into an ingot mold. The aim of the measurement presented here was to determine without any contact the length and transport velocity (= casting speed of the slab poured) of a hot strand to be cut.
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 Length control at a continuous caster |
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Laser Based, Non-Contact Speed Sensor Reduces Breaks in Paper Mill
In response to a significant number of breaks during splicing operations on a continuous coater, a paper mill installed a Polytec LSV on its high speed paper unwind. By integrating the LSV's surface speed signal into the control loop, the mill now consistently matches parent reel speeds to within ±5 ft min-1 at about 5,000 ft min-1 (±0.1%). The result was a significant reduction in tension variation during the splice, which eliminated breaks due to mismatched speeds. The ROI from the installation at the mill was less than one year.
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 LSV at a paper mill |
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LSVs Regulate Undesired Rotational Motion in Steel Rolling Mills
At BGH’s Edelstahl Freital facility, twoe LSV-6000 velocimeters are used in a planetary mill to regulate the process to zero rotational velocity. The first LSV measures the translational velocity and, thus, the length of the steel rod to achieve precision cutoff control. The second LSV measures the rotational velocity. This measurement is fed back into the drive system of the planetary mill to eliminate rotation of the rod.
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 2 LSVs in a stainless steel mill |
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Speed Synchronization in an Aluminum Mill
Alunorf in Neuss, Germany, the world's largest aluminum rolling and remelt plant, uses Polytec’s non-contact, laser-Doppler instrumentation to simultaneously measure length and speed of aluminum plates in the manufacturing process. Several LSV-6000 Laser Surface Velocimeters are integrated into the production line and provide length and speed data for process control.
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 LSVs in an aluminum mill |
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Control of Flying Tube Saws
Flying saws are being used increasingly in tube mills. In order to hit the cut-length value, with minimum wear to the saw blade and other mechanical components, the track speed of the flying saw must be matched with the linear speed of the tube. The LSV can measure tube speed and length directly, without the issues related to contact measurement devices, such as slippage, chatter and changing wheel diameter. The improved feedback to the flying saw results in tighter cut length tolerance, better synchronization of the saw track speed to the tube linear speed and increased saw blade life.
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 Tubes exactly cut to length |
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Length and Velocity Measurement in Tube Mills
Online, high-precision, laser-based velocity and length measurement reduces the manufacturing costs, improves quality and increases yield in tube mills. Tube wall thickness, diameter, eccentricity are measured by passing the tube through multichannel gamma-ray measuring frames. Integrating the Polytec LSV length measurement with these quality measurements enables precise allocation and positioning of quality data along the length of the tube.
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 Längenmessung an Rohren mit dem LSV |
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Automated Gauge and Elongation Control
Cold band is re-rolled in temper mills to produce the final degree of levelness and surface quality. The gauge is determined by the difference in the strip speed when arriving at and leaving the roll stand. Until now, the gauge has been measured using encoded rollers. By replacing contact speed measurement with laser surface velocimetry, measurement errors caused by slippage and contact problems can be eliminated. At a large stainless steel manufacturer, the LSV was used to provide a measurement of the gauge to ± 0.02 %
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 Photo: SMS Schloemann-Siemag AG |
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Length Measurement in Manufacturing of Conveyor and Driving Belts
A leading manufacturer of driving and conveyor belts uses several laser surface velocimeters for length measurements at the cutting station. Thus, customer-specific cuts could be significantly simplified and automated. The cut-to-length accuracy achieved with the LSV is 0.1 % and independent of the surface of the belts
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 Cut-to-length of foil |
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High-Precision Real Time Measurement of Car Speed
A novel application of Laser Surface Velocimeter (LSV) technology is being investigated at Renault for Driving Assistance System evaluation and test. Renault is incorporating the LSV as an on-board reference sensor to measure real-time vehicle ground speed with better than 0.1 km/h accuracy. This accuracy is found to be better than other methods commonly used for ground speed measurement including GPS.
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 Speed measurements on the test track |
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