Study On The Environmental Monitor And Control System Of Animal Building Based On Virtual Instrumentation

The animal building is a place of the animal activity. Only in suitable environment, can animal be more productive and reduce the consumption of feed. Compared with developed country, animal industry is uncultured in our country. And the environmental problem of animal building is one of major factors to cause this present condition .To reduce the negative influence of environment on animal production, in recent years, some environmental control technology concerning confined animal building is adopted. The advanced technology includes using lengthways ventilation and applying wet curtain lower temperature in summer. But in the light of present situation of environmental management in animal building, environmental parameters lack necessary relation each other in course of control, and most of facility must be operated by hand or by mechanical and electrical mode. The level of automation is low and not meet the need of modern management.Applying virtual instrumentation technology, sensor technology, instrument technology and computer technology, the author designs and develops the environmental monitor and control system of Animal Building. On the one hand, testing data is acquired automatically by temperature sensor, relative humidity sensor and gas sensor; the operation of exhaust fan and water pump is adjusted automatically by intelligentized control, consequently, the environment of the animal building is regulated automatically. On the other hand, The acquired data is showed real-timely and controlled messages are output precisely based on the developing platform-Labwindows/CVI, the parameter curve is completely gained.The paper adopts the fuzzy control. The fuzzy control does not need the accurate mathematics model of the controlled objects, and it is a nonlinear control system. The robust stability of fuzzy control is good and its delicacy is poor to the change of system parameter. This control is realized easily, and can attain good control result.The whole system has friendly interface, convenient operation and comprehensive function, which can be used widely in modern confined animal building. The environmental monitor and control system Based on Virtual Instrumentation enhance the stability of testing process, improves the condition of environment in animal building, reduce the workload of feeder and controller; simultaneity, the precision and efficiency ofsystem is largely improved.