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1. 发明公开

EP2379991A2 VERFAHREN UND ANORDNUNG ZUR KONTAKTLOSEN BESTIMMUNG VON GESCHWINDIGKEITSVERTEILUNGEN EINES FLÜSSIGEN METALLS IN EINER STRANGGIESSKOKILLE 有权
标题翻译：飞车接触地确定的方法和系统分布的液态金属连铸
公开(公告)号：EP2379991A2
公开(公告)日：2011-10-26
申请号：EP09810746.9
申请日：2009-12-21
申请人： Helmholtz-Zentrum Dresden - Rossendorf e.V.
发明人： STEFANI, Frank , WONDRAK, Thomas , GUNDRUM, Thomas , TIMMEL, Klaus , GERBETH, Gunter
IPC分类号： G01F1/58 , G01P5/00
CPC分类号： G01P5/086 , B22D11/186 , C22C28/00
摘要： The present invention is used for the non-contact determination of velocity distributions of a liquid metal in a continuous casting die. A preferred field of application of the device is the velocity determination in the continuous casting of steel and aluminum, in particular during slab casting. The determination is carried out in that a primary magnetic field penetrates the liquid metal volume in the die, the magnetic fields induced by the movement of the fluid is measured, and based thereon the velocity is calculated by solving an inverse problem. The calculation employs the principle of least squares, wherein the mean square deviations of the magnetic fields induced by the assumed velocity from the measured values is used as the functional to be minimized. In the process, the Tikhonov regularization is used, wherein the mean square curvature of the velocity field or the mean square velocity is used as the regularization functional. Furthermore, the divergence freedom of the velocity field is ensured by utilizing an additional functional. The array comprises a coil system generating a magnetic field, a measuring and control unit for the fluxes in said coil system, by which the direction of the magnetic field in the fluid can be changed, a plurality of magnetic field sensors in the outer region of the fluid for determining the magnetic fields induced by the movement of the fluid, and means for signal forwarding, processing and representation.
摘要翻译：本发明是用于在连续铸造的所述液态金属的速度分布的非接触确定。所述装置的应用的一个优选字段是板坯铸造过程中速度确定在钢和铝的连铸中，尤其如此。该确定是在做了初级磁场穿透模具中的液体金属体积中进行，通过流体的运动感应的磁场被测量，并且基于其的速度由解决问题的逆计算。计算采用最小二乘法，通过worin从测量值的假定速度感应的磁场的均方偏差用作功能性被最小化的原则。在该过程中，Tikhonov正则化被使用，worin速度场或均方速度的均方曲率被用作正则化功能。进一步，在速度场的发散自由通过附加的功能的利用保证。所述阵列包括线圈系统产生磁场，用于在所述线圈系统中的磁通，由此在流体中的磁场的方向是可以改变的测量和控制单元，磁场传感器中的外区域中的多个流体确定性采矿通过流体的运动引起的magneticfields装置，以及用于信号转发，处理和表示。

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