Design And Research Of A Small Scale Beer Ferment Equipment Temperature Control System In A Laboratory

The thesis puts forward the numeric temperature control system that depends on the principle of singlechip AT89S52, which aims at outdated beer ferment equipment, low automation, instable product quality and the wheat-liquor temperature in a fermenter that has inherence characteristics of multivariable, seriously nonlinear, uncertain, time-variant and large delay. There are three measure temperature points in a fermenter,the temperature signals of the fermenter that can be detected circularly by the control system will be sent to the singlechip, and then the siglechip will deal with the three signals by some specific programs and the opening of the control valves in the three layers is decided by some designed special control arithmetics. The three layer temperature of the fermenter wort will be controlled precisely, consequently the low control precision of the beer ferment internal temperature system has been improved and the comprehensive automatization level of beer production will be improved. At the same time, the communication strategy between a beer ferment equipment temperature control system and an epigyny computer has been studied in the thesis, and the hardware and software of the system have been introduced in detail. System simulation has been done in the thesis about a laboratory fermenter arithmetic model that based on the experiment status, and the control effect is better, so the system feasibility is validated theoretically. The disquisition has some reference value to the temperature control system development of a small scale ferment equipment in a laboratory.