Process control across industries Process control across industries Non-contact speed and length measurement by laser Competence field

Production-integrated speed and length measurement with laser precision Knowing the exact length and speed of sheet materials is key for your cost and process optimization as well as process reliability. Polytec's Laser Surface Velocimeters (LSV) are optical speed and length sensors that surpass the performance of traditional contact based measurement methods like encoder wheels and offer a number of advantages. Process control with laser precision Installed in thousands of locations around the world, LSVs support metallurgical plants, rolling mill products and steel, aluminum and metals production...

Why optical measurement? All Polytec LSV laser surface velocimeters including the latest generation ProSpeedTM LSV support continuous materials and piece goods production processes with precise length and speed measurements. It doesn’t matter whether you’re producing film, paper, cable, textile, wood and construction material, pipes or profiles with a shiny or a matte surface – a Polytec LSV adapts to any task and measures the goods’ surface velocity, allowing the cutting of lengths with zero contact and from a safe distance. Polytec's laser sensors overcome the drawbacks of traditional contact-based...

ProSpeed®, our latest generation sensor, combines the benefits of the optical measuring principle with Polytec's experience of more than 50 years in optical measuring techniques. Installing ProSpeed® optical sensors significantly reduce your maintenance cost and focuses on increasing your manufacturing productivity. Highlights of ProSpeed® optical sensors High optical sensitivity enables measurement on all kinds of material surfaces (even dark, reflective or colored) Flexible interface concept for easy process integration (Ethernet, serial interface, web interface, encoder output, various fieldbus...

Precisely for your production process In many production environments, process reliability and use of material are essential to achieve the overall cost-efficiency. Even the smallest deviation can cause added material costs which can quickly add up. That is why high-precision, non-contact measuring processes are critically important. All Polytec laser surface velocimeters are specifically designed for precise measurement of length and speed in industrial environments. LSVs provide reliable measurement data that can easily integrate into your process control systems. Using an LSV increases measurement...

Plastics, converting & textiles ProSpeed® optical sensors measure length and speed with laser precision in a variety of applications in the plastics, converting and textiles industry including printing processes, laminating and coating systems, extrusion processes and many more. Velocity difference measurement Synchronization of roll and sheet in winding and unwinding processes Speed measurement Dwell time determination in coating and surface treatment systems Control of cutting devices in cut-to-length processes Coil synchronization when winding sheet materials Control of extrusion processes...

Velocity difference measurement Length measurement Speed measurement Tension control

Paper & Packaging ProSpeed® optical sensors are also used in paper and packaging applications from precision position tracking in printing processes to cut-to-length control of packaging materials. Velocity difference measurement Synchronization of roll and sheet in winding and unwinding processes Speed synchronization in flying splice processes Speed measurement Dwell time determination in coating and surface treatment systems Control of cutting devices in cut-to-length processes Coil synchronization when winding sheet materials Control of printing processes Length measurement/cut-to-length...

Speed synchronization Cut-to-length control Velocity difference measurement Tension control

Cable & wire ProSpeed® optical length and speed sensors support the manufacturing of cable and wire in wire drawing stations, in insulating and sheathing lines, in marking and printing processes and in many more. Speed measurement Dwell time determination in coating systems, e.g. for fiber optic cables Control of cutting devices in cut-to-length processes Coil synchronization when winding cables and wires Length measurement/cut-to-length control Cut-to-length and winding of cables and wire Position sensing in printing and marking processes Winding coils Wire drawing Insulating and sheathing wires...

Speed measurement Cut-to-length control Length measurement

Wood & construction materials ProSpeed® optical sensors provide measurement and control solutions for the production of wood products and construction materials such as quality inspections and sorting of lumber, length cutting of insulation materials, length verification of plasterboards and many more applications. Speed measurement Dwell time determination in coating systems, e.g. for wood and wood products Control of cutting devices in cut-to-length processes, e.g. for wood and wood products, plasterboard, glass wool, mineral wool Length measurement/cut-to-length control Winding of sheet material...

Position tracking Defect tracking on wooden slats Length measurement Position tracking

How it works: the laser Doppler principle Polytec's Laser Surface Velocimeters (LSV) use the laser Doppler effect to evaluate the laser light scattered back from a moving object. Two laser beams super-imposed on the surface generate an interference pattern of bright and dark fringes. As the surface moves through the fringe pattern, the intensity of the light scattered back is modulated in frequency. This modulation frequency measured by the photo receiver of the sensor system is directly proportional to the surface velocity. Polytec's LSVs reliably detect the surface velocity including the direction...

Polytec has been bringing light into the darkness for more than 50 years. With nearly 500 employees worldwide, we develop, produce and distribute optical measurement technology solutions for research and industry. Our innovative and quality products have an excellent reputation internationally among the expert community. We find solutions tailored to our customers’ requirements on a day-to-day basis. Optical measurement systems improve and ensure your profitability even after many years of use. Our customer service will help you to maintain the equipment to be ready for use with its latest technical...