| Hatch equipment is one of the applications of the bionics. It imitates the natural hatching environment and provides the fitting condition of the embryo upgrowth. It can be used in the domesticated fowl breeding egg of the hatching. The hatching machine control system is multivariable, multi-couplings; multi-disturbances and big lag complex dynamic system. According to the hatching craft, the overall system can be decomposed into three parts: the temperature control subsystem, the humidity control subsystem and the throttle control subsystem. The system has used the indirect fuzzy decoupling method.In order to increase the hatching machine temperature control precision and simplifies the control structure, the warming system uses the multi-group preheated pipe controlled by the zero crossing triggering solid state relay. The system selects the AD590 integration temperature sensor and French HUMIREL Corporation's capacity type humidity sensor HS1101. The system uses four half (14 bytes)double integral A/D switch ICL 7135, it has the high precision, the low noise, the low drifting as well as very strong anti-power frequency disturbance ability and so onIn order to enhance the reliability and the efficiency of the control system, The system uses the MCS51 series monolithic integrated circuit. Except conventional design, the system hardware architecture expands data which piece of EEPROM the 93C86 memory system the setting value as well as the expert system needs. The temperature and humidity merit has been memorized and demonstrated in the hatching process recording, and it has the demonstration of each kind of running status and alarming function. The system provides the standard serial communication connection; it can realize the group control system of host and subordinate type with the master computer.The experiment indicates that the system is stable and reliable; it enhances the hatching rate obviously and reduces the weak young quantity.
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