Study On Computer Control System Of The Carbony Compound Mode Evaluation Device

The Carbonyl Compound Mode Evaluation Device is a research chemical production line newly built by Lanzhou Institute of Chemistry Physics Chinese Academy of Sciences, whose main intention is to make qualitative and quantitative evaluation of the properties of cobalt salt catalyst through the process of producing high-carbon alcohol with carbonyl compound. In view of the control requirements and technical indicators required by the production process of The Carbonyl Compound Mode Evaluation Device, this thesis has designed a kind of two-stage distributed computer control system. The configuration software is employed to compose system control picture, real-time temperature-controlled curve, data report forms and so forth in industrial control computer, which can vividly and directly show the operation state of the system and its control procedure. While the intelligence instruments taking AT89C51 as its core and implements the control of such parameters as temperature, pressure, flux, liquid location, etc. during the reaction process of carbonyl compound.Taking temperature control of The Carbonyl Compound Mode Evaluation Device as its research object, in the light of the characteristics of its complete lagging, great inertia, non-linear and heat coupling, and this thesis puts forward to form Smith predestinating control decision-making of fuzzily self-adjusting PID parameter by integrating the traditional Smith controls method and fuzzy controls method. It enables the temperature control to have the good, dynamic and static quality by on-line self-adjusting to parameter K_P, K_I and K_D. This system has realized the communication of the PC and intelligence instruments through 485 Bus, This paper has analyzed the exchange mode of dynamic data between the Kingview and the intelligent instruments, and has generated VB communication application program.This system has already gone into running after testing, the on-the-spot operation results show that it has good systematic stability, high dependability and entirely meets the design object and requirements.