The Study On DR1000 Paperless Recording Instrument

The recorder is a second instrument which is widely used in industrial automatic production . But the traditional recorder has a lot of shortages;complicated structure,simple function,frequently addinq ink and paper changed etc. In addition,the data are registered in paper with the shape of a curve,so it is not convenient to saving,processing and editing of a file. The paperless recording instrument will initiated an epoch,because it has integrated the electronic technology,cyber- technique and network communication technology. Not only it bring some new methods of testing signal and the graph-display of changeful shape,but also source data is may saved. So it is high practical applyed-value to develop paperless recording instrument. It contain some advanced scientific technologies,and it's help to master the technology of micro-electronics and computer network communication technique. It is very important to develop the paperless recording instrument (DR1000).The study are based on the concept of intellectualized instrument,and I have adopted the method of low-cost automatic system. In the hardware,Bring up an embedded system of single chip based on cpu(80c!96kc);In the software,I used series 96 compile language and visual program based on VB in recording instrument. The product has the following characters:all-purpose input,completed separated signal channels,collection of the signal data by scanning,the display technique of LCD big screen,FLASH memory;capacious compatible floppy disk,36 types of signals,multiple alarms,communication of RS232/485 and Hart confered-link with a view to second generation technique of the field-bus. During the developing course,I used the method of reliability design to design hardware,and researched carefully the process of weak signal.Pass to practice,The product has achieved all aim of the design. Firstly,its sample period of 8 channels is 1 second. Secondly,its sensitivity is can obtained 4/10000,its precision is about 1/1000. Besides it can exchange information between recorder with the computer control by powerful Network communication(including setting signal,changing mode,real-time transmitted data). In the industrialized automatic production,It can easily remote control the spot,and it can also exchange information with the adjuster,actuator,transmitter,they have constituted a huge automatic control system.