A time synchronization signal adaptive acquisition circuit and control method

Abstract

The invention relates to an adaptive acquisition circuit for time synchronization signal and a control method. The adaptive acquisition circuit for time synchronization signal comprises an attenuationI module, an attenuation II module, a buffer module, an impedance network I module, an impedance network II module, an impedance network III module, an analog to digital conversion module and four relays, wherein each relay is provided with one normally open contact. The adaptive acquisition circuit for time synchronization signal is characterized in that the attenuation I module, the attenuationII module, the buffer module, the impedance network I module, the impedance network II module, the impedance network III module, the analog to digital conversion module are connected in turn; and a normally open contact of one relay is respectively bridged to the two ends of the attenuation II module, the impedance network I module, the impedance network II module, and the impedance network III module. The adaptive acquisition circuit for time synchronization signal and the control method in the invention adopt a unified physical interface to access the time synchronization signal, changes the structure of the acquisition circuit by switchover of the four internal relays so as to adapt to different output modes, and converts the into a digital signal by using the analog to digital conversion module, which can truly reproduce the signal waveform.

Description

technical field [0001] The invention relates to a time synchronization signal adaptive acquisition circuit and a control method, which belong to the field of electric power system automation. Background technique [0002] With the rapid development of the power system, the need for time synchronization is becoming increasingly urgent. Accurate, safe and reliable clock sources are needed to provide accurate time references for various equipment in the power system. Therefore, the power system has formulated corresponding time synchronization standards, defining physical interfaces, data interfaces, system components, and accuracy. [0003] The types of time synchronization signals output by the clock source include pulse signals, IRIG-B codes, and serial port time messages, and the output methods include TTL, RS-232, RS-422, RS-485, AC, 24-220V active contacts, etc. . Generally speaking, the acquisition of the time synchronization signal needs to select the corresponding in...

AI Technical Summary

Problems solved by technology

There are two problems in this method: one is that the number of interfaces is large (equal to the number of output modes), and the corresponding interface needs to be selected according to the output mode; the other is that the output digital signal is a binary sequence, and the signal waveform cannot be viewed

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