Design Of Digital 3D Oscilloscope Imaging Module Based On Multi-FPGA Architecture

With the development of electronic information technology,analog signals show a trend of highly complex changes.To capture and analyze such signals,it is necessary for the test system to have a high sampling rate and a high waveform capture rate.Digital 3D oscilloscopes have become the mainstream of development in the field of time domain testing due to the high waveform capture rate brought by its parallel architecture and its unique 3D waveform display effect.In this paper,a high-performance 3D mapping system is built on the multi-FPGA architecture of a 10 GSPS digital 3D oscilloscope,so that the system has a higher real-time waveform capture rate and a better display effect.Combining segmented storage with three-dimensional mapping,making full use of the high storage efficiency of segmented storage and the unique three-dimensional display effect of three-dimensional mapping,can quickly analyze and locate signals.The main research contents of this article are:1.Achieve a real-time waveform capture rate of 1,000,000wfms/s for the digital three-dimensional oscilloscope.On the basis of 10 GSPS digital three-dimensional oscilloscope,under its multi-FPGA architecture,through the research of its waveform capture rate,analyze the factors that affect its waveform capture rate.On this basis,technical methods such as pipelining,parallelization,and ping-pong operation are reasonably used to improve the waveform capture rate of the digital three-dimensional oscilloscope.2.Monochrome and cross-color display of three-dimensional waveforms and brightness adjustment.In order to make the three-dimensional waveform display more prominent and more layered,this article starts from the monochrome system and designs a cross-color display scheme to make the three-dimensional image display more layered.At the same time,the corresponding brightness adjustment function is designed in this paper,and the waveform information of different probabilities can be highlighted through brightness adjustment.3.Three-dimensional mapping in 10K-1G multiple storage depths and threedimensional mapping in segmented storage.Use external DDR3 SDRAM memory instead of FIFO in FPGA to realize variable depth storage and segmented storage of waveforms,which flexibly expands the storage space of the system and enables the system to retain more waveform details.Based on this,this paper designs two mapping schemes: three-dimensional mapping under 10K-1G multiple storage depths and threedimensional mapping with segmented storage.This article has completed the construction of a real-time 1,000,000wfms/s waveform capture rate 3D imaging system on a 10 GSPS digital 3D oscilloscope.The three-dimensional waveform image after color conversion and brightness adjustment can intuitively reflect the probability information of the waveform,the number of waveform amplitudes stored in segments can reach the set number,and the combination of segment storage and three-dimensional mapping functions is normal.