A clock synchronization measurement method and system based on double buffer

Abstract

The invention provides a method and a system for measuring clock synchronization based on double buffer areas. The system comprises a DSP (digital signal processor) and an FPGA (field programmable gate array), wherein the DSP and the FPGA are arranged in a measuring device; the DSP comprises a data receiving unit, a data calculating unit, a first buffer area and a second buffer area; the data receiving unit is used for receiving sampling data from the FPGA in the measuring device; one of the first buffer area and the second buffer area is used for storing the current sampling data at any time; when the sampling data received by the DSP is the last packet in an absolute time tag TPa, the currently received sampling data is switched to be stored into the other buffer area; when the data length in the other buffer area reaches the measuring and calculating data length TPm, the data calculating unit starts to read the data in the buffer area and calculate parameters, and the original buffer area continues to store the sampling data and calculate the parameters, until the length of the stored sampling data reaches TPm; the original buffer area does not work, and the buffer areas are switched to work, so as to realize the synchronization measuring and calculation.

Description

technical field [0001] The invention relates to the technical field of synchronization of measuring instruments, in particular to a clock synchronization measurement method and system based on double buffers. Background technique [0002] Instruments and meters with electrical measurement functions such as power analyzers, power quality analyzers, and online power monitoring devices, in order to ensure that two instruments produce the same results when measuring the same signal, or use multiple instruments at different locations in the same measurement system. When measuring, it must have the function of clock synchronization measurement. [0003] Accurate clock-synchronized measurement functions have an important impact on measuring instruments in terms of synchronous sampling, power event detection, and power failure analysis. Most of the current synchronization measurement methods use timers with large errors; some GPS timing synchronization measurement methods do not co...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for clock synchronization measurement based on double buffers, so as to solve the technical problems of insufficient measurement accuracy, frequent time synchronization and low efficiency of existing measurement devices when performing clock synchronization measurement

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