Control Of Sprinkling System Based On THI For Cooling Dairy Cows

Now the high temperature has brought many bad effects to dairy cows-breeding in southward especially in summer. This paper makes a further study on the control of sprinkling system for cooling dairy cows.According to the life style of dairy cows, this study realizes the control of sprinkling system through controlling mode, which uses temperature-humidity index (THI) as a chief control parameter, also adding time parameter, thus efficiently reducing cow's heat stress.The control system was developed with Single-Chip Microcomputer technology, consisting of controlling part and power driving part. The MCU of controlling part adopts AT89S52 microcomputer, and the peripheral circuits include power supply, data gathering and memory, AD convertor, real time chip, LED display, keyboard scanning and relay driving module; The power driving part mainly designs the alternate-running sprinkling mode, realizing the direct control of cooling equipment.This paper presents main part of hardware and software design of the controlling system, and makes an analysis towards system debugging and running.