| A control system for carbon potential is developed in this paper. Firstly, the theory of carburization and its control method in drop-feed atmosphere in pit-type furnace are briefly analyzed, and the interaction among parameters of carburizing process is described. Secondly, the transfer function of the pit-type furnace is identified by the dynamic properties which is measured by test, and to improve the quality of carburization, a rational control algorithm 桺ID control 梚s selected. Then the control system for carbon potential has been developed by designing hardware and software in which Intel 8031 is the core. Finally, the control system is assembled on a pit-type furnace controlled by manual formerly. By our comparing the results of the carburization of sample, the control system for carbon potential improves the general properties of the sample, shortens the carburizing time, embraces high reliability of working steadily even in bad environment, and proves the wide prospect of the control system. |
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