The Research Of Key Technologies On Little Type Paperless Recorder

As an important instrument to record data, recorder has now been used on various kinds of industrial sites. Meanwhile, with the rapid development of computer hardware and software, computer technology has exerted an innovational influence on Industry of Instrument and Meter. Virtual technology-based intelligent recorder has now become a new trend in the development of recorders.The present thesis presents the author's research on the R&D of 80C320 single-chip based Little Type Paperless Recorder. With the modularization and low cost designation, especially with the reasonable task scheduler and full usage of the hardware, the recorder system displays satisfactory stability, reliability and quality-to-price performance. The research findings were delivered to the cooperator in October 2003, and the product will be commercially available in May 2004. It is predictable that the Little Type Paperless Recorder will enjoy a wide acceptance in the market and a bright future in commercial terms.This thesis starts with the features and developing tendency of the recorder, and then discusses the realization of each functional parts of the Little Type Paperless Recorder, through a detailed introduction on its hardware and software structures, focusing mainly on the following innovative technologies:Methods for banks switch, which makes the program running fluently on multi-ROMs.Optimization of the task schedule mode, which realizes a creative division on system tasks as 'Reserve Task', and has guaranteed the system a real-time response on the basis of 'Foreground/Background SystemIntegration of different methods such as Twice Measurement', Twice Seizure', 'Revision Online' and 'Revision Offline' in the metering process, which enables the system to meet a high-precision requirement(better than 2%0) at low cost.Usage of 'Double Buffer', which makes the history search more easily.Upgrade of muti-task platform, RTX51 tiny, which empowers it to meet the requirements for commercial usage.Finally, in the conclusion part, the author summarizes the whole research and offers some new ideas concerning the Paperless Recorder.Some research findings have applied for national patent.