A Shape Measurement System for Cold-Rolled Steel Strip Based on DSP

Abstract

Research and application on shape meter are introduced, especially in China. A self-made MPIBPST(MultiRoll-Piece Inner Bore Piezomagnetic Sensor Type) shape meter roll for cold-rolled steel strip was applied in to the industrial test. MPIBPST means that one shape meter roll is made up of some roll-piceses, there are two bores in each roll picesce, and each inner bore contains one piezomagnetic sensor. In order to combine with the work of the shape meter roll and display the real-time shape, a shape measurement system based on TMS320F2812 is designed and developed. Measurement principle on shape, hardware and software design are described in detail. The running in the industrial field for about six months shows that shape meter has the advantages of signal stability and credibility, stronger antiinterference ability, high-precision, and meets the measuring requirements on the industrial field. The successful application of the MPIBPST shape meter lays a solid foundation for the further research on AFC (Automatic Flatness Control System) in China. The design on this system also has a reference value for similar work.

Research on Industrial Shape Meter and its Application

“…However, the shape detecting is the core and premise of the close loop shape control [1][2][3][4] . In recent years, a variety of structural forms of shape meters and its related mathematical models were proposed [5][6][7][8][9][10][11][12][13][14][15] . Usually, the shape detecting systems or that the shape meters mainly consist of the shape detecting roller, the collecting ring, the AD acquisition card and the shape control model and so on.…”

“…Based on the shape detecting principle and the shape control theory of cold rolling strip [1][2][3][4] and the DSP (Digital Signal Processing) technology [13] , a high precision shape detecting system is developed to meet actual industrial application. The integral detecting roller is designed in an innovative way.…”

Shape Detecting and Shape Control of Cold Rolling Strip

“…Close loop shape control is one of the key technologies of cold rolling strip, and the shape detecting is core technology of the close loop shape control [1][2][3][4] . In recent years, a variety of structural forms of shape meters and its related mathematical models were proposed [5][6][7][8][9][10][11][12][13] . Usually, the shape detecting systems or that the shape meters mainly consist of the shape detecting roller, the collecting ring, the AD acquisition card and the shape control model and so on.…”