公开(公告)号：US5507854A

公开(公告)日：1996-04-16

申请号：US353888

申请日：1994-12-12

申请人： Takeo Yamada ,  Masao Sugawara ,  Kouichi Matsumoto ,  Akio Nagamune ,  Kouichi Tezuka

发明人： Takeo Yamada ,  Masao Sugawara ,  Kouichi Matsumoto ,  Akio Nagamune ,  Kouichi Tezuka

IPC分类号： G01S11/00 ,  B22D11/20 ,  C21C5/30 ,  C21C5/46 ,  G01F23/24 ,  G01F23/284 ,  C21C1/04

CPC分类号： B22D11/201 ,  G01F23/24 ,  G01F23/245 ,  C21C5/30 ,  C21C5/4673

摘要： First and second electrodes are inserted into molten metal. A first pseudo random signal is transmitted to the first electrode, and at the same time the first pseudo random signal and a second pseudo random signal which has the same pattern as the first pseudo random signal but which is slightly different in frequency from the first pseudo random signal are multiplied by each other in a first multiplier to thereby calculate a first product value. A signal obtained from the second electrode and the second pseudo random signal are multiplied by each other in a second multiplier to thereby obtain a second product value. The displacement of the molten metal is calculated from the time difference between maximum correlation values respectively appearing in time series patterns of the first and second product values.

摘要翻译： 将第一和第二电极插入熔融金属中。 第一伪随机信号被发送到第一电极，并且同时具有与第一伪随机信号相同的图案的第一伪随机信号和第二伪随机信号，但是频率与第一伪随机信号的第一伪随机信号略有不同 随机信号在第一乘法器中彼此相乘，从而计算第一乘积值。 从第二电极和第二伪随机信号获得的信号在第二乘法器中彼此相乘，从而获得第二乘积值。 从分别出现在第一和第二乘积值的时间序列图案中的最大相关值之间的时间差计算熔融金属的位移。