In the glass product, the annealing of the glass finished product is a key link of the production process, playing an important role to quality of the glass products, its essence of the course of annealing is course of temperature control. This text will use to take control of the high-temperature district as an example, through the selection of the controller, input the design which exports the passway and other control design of part realizes whole temperature control of system to come. This system adopts AT89C51 as CPU, the design of the input channel passes I/V converter, A/D converter, output the design of passway to export through V/I converter , D/A converter signal and form one form close ring bunches of grades of ratio system control. This system after putting into operation, it can send back goods state, stove of temperature to monitor, guarantee the stability of furnace temperature
Key word: Glass retreat stove AT89C51 PID control algorithms
