Research On Techniques For Virtual Non-paper Recording Instrument

After the simulative instalment, digital instalment and intelligence instalment, the virtual instalment (VI) is becoming an important trend of measurement instrument and the VI technology is applied in many instrument fields. The virtual instrument concept break through the limit of conventional instrument. It integrates the instrument technology and computer technology and uses software to realize its main function. The resource pressure is remarkably reduced in data process, display, communication, and data storage. It results in the instrument cost reduce. The paper is mainly discussed the application of the VI concept in the non-paper recording field.The VI concept and its development are introduced in the first chapter. Based on the VI concept, the architecture of virtual non-paper recording instrument is proposed in the second chapter. In the third and fourth chapter, the front end of measurement is realized. In the third chapter, the mechanism of the AD chip is introduced. The signal measurement way and the hardware realization is illustrated. The performance is analyzed. In the chapter four, the software structure is put forward. The software realization of data acquisition control and data process is discussed in detail. The concept of finite state machine (FSM) is used in the multi-channel management. And a section differential algorithm is used to compress the static temperature table. In the chapter 5, the static and dynamic calibration is used to increase precision. In the chapter 6, several widely used fieldbus are introduced. And a project of virtual non-paper recording instrument networking is designed. In the chapter 7, the interactive interface is analyzed based on the object oriented program idea (OOP). And a virtual panel of the virtual non-paper recording instrument, whose function can be defined by user, is designed.