Abstract
The waveform recording has been widely used in the teaching scientific research, the industry monitor, the medical inspection, the geological research and the earthquake forecast and so on. Common oscilloscopes haven’t the function of observing the non-repetitive slow-changed signals. A way of designing the waveform graph is presented. The designed instrument can represent the waveform of the non-repetitive signals, and possesses highly practical uses.This article has made some preliminary attempts and research in the Waveform recording application. Introducing a new the Waveform Graph take the AT89C51 Single chip microcomputer as the core. And at the same time, it is made up of by A/D converter, random access memory, D/A converter and any other component. The system has eight input channels and the bipolarity output, and it stores waveform by district. Considering the electric circuit ant jamming, the electricity protection circuit is made for exterior data-carrier storage to preserve data for a long time. The design was started from the top, according to the function, it divides into four sections: Loses the human electric circuit, the keyboard and display circuit, the control and storage circuit and the output circuit. In the design the circuitry is simple, reliable, and has usability.
Keywords: Waveform recording; Single chip microcomputer; Data storage; Waveform reconstruction