Velocity measurement on roll-fed material and piece goods

Velocity measurement is indispensable for process control and optimization in many industrial processes. It is the basis for many other applications such as cutting length control, length measurement, velocity difference. In these processes velocity is measured using the laser Doppler technique.

Laser surface velocimeters (LSVs) from Polytec are ideally suited because they can conduct measurements on almost any surface and they are not susceptible to contaminated surfaces. The non-contact measuring technique makes it possible to eliminate any negative influences on accuracy, such as slippage and wear, simultaneously. The product being subjected to the measurement remains intact too. Another benefit of Polytec systems is the flexible interface concept – it enables velocity readings via encoder output, serial interfaces, LAN, Profibus and Profinet.

Practical examples

Polytec LSVs are used for various velocity measurement tasks in the wood and construction materials industry:

  • 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)

Industrial length and speed control with optical sensors

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