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现有的电测深滤波器还不能满足各种需要。对某些问题,或是在某些情况下,必须自行设计滤波器。有两种设计方法:付里叶变换法和最小二乘法。和付里叶变换法相比,最小二乘法的优点是:计算速度快,计算存储量小,而且不必考虑滤波器的位移。在不能用付里叶变换法的某些情况下,只要有一台袖珍计算器或微型计算机,即可用最小二乘法来设计所需的电测深滤波器。我们参考了O.Koefoed的程序,编制了一个设计电测深滤波器的PC-1500程序。它可用于设计各种装置,不同抽样间距的电测深正、反演滤波器,还可用来设计通用的最小二乘滤波器。
The existing electric sounding filter can not meet the various needs. For some problems, or in some cases, the filter must be designed. There are two design methods: Fourier transform and least squares. Compared with the Fourier transform method, the least squares method has the advantages of fast calculation speed, small calculation memory, and no need to consider the filter displacement. In some cases where the Fourier transform method can not be used, a pocket calculator or microcomputer can be used to design the required electric sounding filter using the least squares method. With reference to O. Kooeed’s program, we have prepared a PC-1500 program for designing the electric sounding filter. It can be used to design a variety of devices, electrical sampling depth of different sampling interval, inverse filter, can also be used to design a general least square filter.