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| Studies on Intelligent Drip Irrigation Control System in Greenhouse Based on Penman-Monteith Equation |
| HAN Li-na1，2，WANG Xiao-chan1，2* |
| 1 College of Engineering，Nanjing Agricultural University，Nanjing 210031，Jiangsu，China|2Key Laboratory of Intelligent Agricultural Equipment in Jiangsu Province，Nanjing 210031，Jiangsu，China |
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Abstract This paper is intended to devise a set of intelligent drip irrigation control system by using Penman-Monteith equation to calculate the amount of crop irrigation．The system uses humidity and temperature sensors to collect air temperature and humidity in greenhouse，and employs Penman-Monteith equation to calculate crop evapotranspiration．And then MCU programme is used to control the drip irrigation time．The control part of the system adopts upper and lower computer．It delivers data in wireless serial communication．The experiment proves that this method is convenient, reliable and can be applied in precise irrigation in greenhouse．
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Received: 15 June 2012
Published: 25 July 2012
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