Frequency tracking power frequency digital filtering method
A technology of digital filtering and frequency tracking, applied in digital technology network, automatic power control, impedance network and other directions, can solve the problems of inapplicable to retain slowly changing signals, not involving filter parameter settings and hardware details, application scope limitations, etc.
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[0029] An embodiment of the present invention is described in detail below: this embodiment is implemented under the premise of the technical solution of the present invention, has provided detailed implementation and specific operation process, but protection scope of the present invention is not limited to the following Example.
[0030]The entire filtering process of this embodiment is that the central processing unit controls the analog-to-digital conversion chip to use the 8 times frequency of the power frequency as the sampling frequency to sample and quantify the signal, and then use the comb filter algorithm or adaptive filter algorithm to realize the power frequency and its multiples. The frequency notch is finally controlled by the central processing unit to output the filtered signal.
[0031] In this embodiment, most of the components can be replaced by other products with similar functions. For example, the phase-locked loop chip can be replaced by various common ...
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