FREQUENCY INCREASING METHOD AND APPARATUS OF EARTHQUAKE DIGITAL SIGNAL

摘要

Disclosed is a frequency increasing processing method of a digital signal, which comprises the following steps: S101, inputting a real signal channel collected in a certain period of time; S102, performing Hilbert transformation on the real signal channel so as to obtain an instantaneous amplitude channel of the real signal channel; S103, based on the instantaneous amplitude channel, perform frequency increasing and polarity inversion processing on the real signal channel so as to obtain a frequency increasing signal channel. Because a polarity of an event signal is eliminated and a frequency is increased, a valid weak event signal and an invalid interference signal are easier to be distinguished. Thus, a weak signal source can be identified without a large number of strong events. This shows advantages of environment protection and cost reduction in the field of shale gas crushing micro-earthquake monitoring. In addition, the zero polarity inversion and frequency increasing processing in the present invention are simple in steps and are highly universal. Once constants k1 and k2 are given, signal frequency and zero polarity processing of any signals can be implemented.