Measurement of hot rolled stock dimensions, position and temperature distribution

BETRIEBSFORSCHUNGSINSTITUT (BFI) has developed various systems for measuring hot rolled stock. One example is line sensors, which use the characteristic radiation of strip or slabs to determine their width, central position, edge position and temperature distribution. These systems developed by the BFI are practical means for solving the following problems:

• Adaptation to the strongly temperature-dependent brightness of the measured object through very fast amplitude control
• Reliable detection of cooled edges with adaptive trigger circuits
• Suppression of interference caused by water, mill scale and flying sparks

Such systems are used to monitor the production of hot strip, wire rod, forged material, etc.

Their high radiation sensitivity enables their use at temperatures as low as around 550°C, with it being possible to select the measurement distance individually, as a function of the application, so that there can be no risk to the camera.