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2. 发明专利

JPH08325695A PRECISION CORRECTION METHOD FOR POSITION DETECTOR OF HOT DIPPED STEEL SHEET 失效
公开(公告)号：JPH08325695A
公开(公告)日：1996-12-10
申请号：JP12677595
申请日：1995-05-25
申请人： NIPPON STEEL CORP
发明人： ISHIZAKI KAZUNARI , OTANI CHIAKI , MIYAKOSHI NAGAHIRO , OGATA MITSUO
IPC分类号： G01N23/223 , C23C2/20
摘要： PURPOSE: To correct precision for position detector of steel sheet and to control dispersion of coating weight by utilizing function approximation on calculated distance between traveling steel sheet and gas wiping nozzle, calculated from plated coating weight in downstream of plating equipment, and distance between the steel sheet and gas wiping nozzle detected with position detector of steel sheet. CONSTITUTION: Estimated distance X between steel sheet 1 and gas wiping nozzle 5 is calculated by using an equation I (where, D is distance between steel sheet and gas wiping nozzle (m 50m), W is coating weight (kg/cm ), P is gas wiping pressure (kg/cm ), V is passing speed of sheet (m/min), K0 to K3 are constants for each kinds of steel) from detected coating weight of a measuring instrument for plated coating weight utilizing fluorescent X-ray intensity, and gas wiping pressure corresponding to the coating weight and passing speed of sheet. Estimated distance X and distance Y between steel sheet 1 and wiping nozzle 5 measured by the steel sheet position detector corresponding thereto are function-approximated like equation II. The equation II shows precision character of steel sheet position detector 6. Accordingly, since output value after correction of the steel sheet position detector 6 is calculated by equation IV, considering precision character, linearity if inverse function of equation II, equation III is used, the output value is corrected by correction arithmetic unit 99.

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