Method and system for judging similarity of two waveforms with time delay and storage medium

Abstract

The invention discloses a method and a system for judging the similarity of the two waveforms with the time delay and a storage medium, which can be used for judging the similarity of the waveforms ofthe two groups of waveforms and judging the current signal measured by which path in the host is the same as the periodic square wave current signal generated by the extension in the phase change relation judging equipment. The method comprises the following steps of setting a sampling circuit to sample a signal I and a signal II, respectively removing direct current components in the sampled signals, performing phase detection on the two waveforms, performing phase synchronization on the two waveforms, and calculating the similarity of the two waveforms. The invention discloses a method forjudging similarity of two waveforms with time delay. The method comprises the following steps of judging time delay time of two signals by adopting shift multiplication, correcting the sampling data of the two signals according to the delay time to eliminate the delay of the two waveforms, and judging the similarity of the two signals by adopting a same-point sampling value subtraction algorithm.

Description

technical field [0001] The invention relates to the technical field of phase change relationship judgment equipment, in particular to a method, system and storage medium for judging the similarity of two waveforms with time delay. Background technique [0002] In the station area and line identification equipment, it is necessary to compare two (continuous) measurement cycle current waveforms (for example: 0-ts is connected to about 5A current, t-2ts is connected to about 10A current, 2t-4ts is disconnected from all currents, Cycle like this.) and give the similarity between the host waveform and the extension waveform. as follows figure 1 Example in: [0003] Reach above-mentioned goal, there is following technical problem: [0004] ① The current measured by the host and the extension is different, and the host is I 主 =I 分 +I 用户 , while the extension current is only I 分 , the current amplitudes of the two are inherently different; [0005] ②I 用户 The current will ch...

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Problems solved by technology

[0004] ① The current measured by the host and the extension is different, and the host is I 主 = I 分 +I 用户 , while the extension current is only I 分 , the current amplitudes of the two are inherently different;

[0006] ③ There is asynchronous time between the host and the extension to start measuring, so there is a lag phenomenon in the time domain of the waveforms measured by the two

[0012] Defects or deficiencies in this method: only one parameter of the effective value of the waveform is used as the basis for interpretation, and other parameters of the waveform such as DC components, frequency, amplitude, shape, phase, and interference information are not introduced, and the accuracy of judgment is relatively low

[0016] Existing defects or deficiencies: the algorithm is complex, and parameters such as the DC component, phase, and interference information of the waveform are not considered

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