Design And Implementation Of Large-Capacity Storage And Dual Capture Module In ScopeCorders

With the rapid development of power electronic,automobile electron,and mechatronic,the demand for data analysis is increasing,so we need to capture and store electrical signals and physical signals,and we require data acquisition system to capture the high-speed data of multiple channels simultaneously.The scopecorder is valued because it can achieve different types of analog and logic signals of multiple channels and performs arithmetic analysis simultaneously,and,the display function is the same as the oscilloscope.It can be used to observe high-speed waveforms.However,the multi-channel acquisition data brings great pressure to the storage due to restricting the development of data recording instruments.This article is based on a scopecorder project,large-capacity data storage with multiple channels,different sample rates,and variable number of channels is researched in this paper.We design and implement the hardware platform of the project.The main research contents are as follows:1?According to the functions required by the scopecorder.From the perspective of system,the key technical difficulties are analyzed.The main difficulties of each module of the scopecorder are analyzed,the scopecorder's overall design was proposed through comparison.Finally,we make a reasonable plan for the functions required by the indicator.And put forward to a modular design scheme.When the time base is large,the capture period of large-capacity data is longer.Then,the observation of waveform is affected,new solution to achieve display data storage is proposed.2?A design for realizing large-capacity data storage in which by changing the number of channels is proposed.That can be achieved up to 16 channels of data and channels can be expanded to more.The user can select the depth of data storage according to the need.When the data is uploaded to the host computer,a new data buffering method is adopted,which improves transmission bandwidth of the transmission.3?History function of the large-capacity record is realized to record function for the historical data.At the same time,the ability to capture abnormal waveform data can be improved by changing the size of the data storage depth.4 ? The function of dual capture is realized,the dual capture function of the scopecorder allowed user to observe the long-term monitoring waveforms and waveforms of instantaneous phenomena of single-channel waveforms simultaneously.Also,the trend data is realized with a low sampling rate,and high-speed transient phenomena is captured by the high sampling rate.Two different sampling rates can be used to meet data capture requirements.The maximum sampling rate of the subwaveform is 100 MSPS,and the record of waveform data is up to 500 Kpts.After testing,the scopecorder designed in this paper which can meet the needs of performance indicators in large-capacity storage and dual capture functions.