Design And Realization On Coriolis Mass Flow Meter

In initial stage of the seventies, with the development at full speed of modern industry, under the situation that measurement method can't meet the demands, appear direct mass flow measure instrument - Coriolis mass flow meter on the department in traditional flow. Its appearance makes the measurement technology of the fluid have fundamental break-through, but a great deal of shortcomings still exists. If the flow meter is particularly sensitive to noise and vibration frequency of pipeline influence by factors such as the fluid density, etc. and measurement precision influence by treatment method etc.This text has introduced the principle of Coriolis mass flow meter and research current situation in the department at first, have expounded the problem to be solved of research institute of a subject; Then to the theoretical foundation that this text adopts - Random function relevance theory make in detail explaining , sum up to DSP characteristic of chip that subject adopt; Introduce software and hardware key technology and gains in depth of comprehension debug , of design of system this, looked forward to the development prospect of this subject finally. Have proposed dealing with the chip in the article as the central real-time signal processing system with the digital signal of high performance of the instrument company of Texas Instrument of U.S.A., realize the bad accuracy to the frequency of the transducer signal, phase place is calculated, calculate the velocity of flow of the fluid according to the inherent oscillation frequency of the system, and then calculate the mass flow of the fluid. Have adopted it from self-relation, Correlation, cycle average, such algorithms as the parabola fit, to analyzing from measuring the signal of visiting the fluid from head to foot that is in charge of gathering. To influence department Coriolis mass flow meter measure precision and several factor of stability carry on relevant to punish, have reduced influence on measuring the precision and stability degree such as vibration , working pressure , interfering with electromagnetically effectively. Improve algorithms; optimize codes, the signal processing speeds of the security system and requirement for real-time character of the system.Simulation and projects provider- ShaYang Instrument Factory the whole sets of experimental showed that the research methodology and the development of this system is feasible, effective and reliable.