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同济大学电气系研制的“LZI型离线信号采集机”于1989年9月23日通过技术鉴定。与会专家一致认为离线信号采集装置已实现四通道信号同步采集,能滤去信号记录纸上底格线条,提高了有用信号的保真度,具有一定的创造性,适用面宽,经济、社会效益显著,成果属国内首创,达到国际先进水平。信号采集分为实时采集和离线采集。在实时采集中,同步生理记录仪采集的只是记录纸上的信号,不能供计算机进行数据处理,磁带机采集信号,先录后放,分为二步,效率低,
Tongji University Department of Electrical developed “LZI off-line signal acquisition machine” in September 23, 1989 through technical appraisal. Participants agreed that off-line signal acquisition device has achieved four-channel signal synchronization acquisition, the signal can be filtered off the bottom grid lines, improve the usefulness of the signal fidelity, with some creativity, wide application, economic and social benefits significantly , The result is a domestic initiative, reached the international advanced level. Signal acquisition is divided into real-time acquisition and offline acquisition. In real-time acquisition, the synchronous physiological recorder only collects the signal on the recording paper and can not be used for data processing by the computer. The tape drive collects the signal, pre-recording and post-release, and is divided into two steps,