Research Of Detecting System Based On Vitechnique For Aco

Water is essential to all lives. The water-used efficiency plays an important role to evaluate whether a country or a district could develop continuously. Precision irrigation technique is one of the methods of saving water resource. How to detect water stress level in crops accurately is the basis of precision irrigation technique. As a new index, acoustic emission that associates soil, crops and atmosphere factors attracts many researchers recently. It is some kind of supersonic result from the breaking down of water transmission in crops under water stress. It is also called as "plant language". A new method of detecting water stress of corn by detecting acoustic emission from its leaves or stem has been discussed in this article. An automatic detecting system was constructed to detect acoustic emission of plants, evaporation of plants and environment information in real-time. The hardware of the system includes instruments such as PCI-2 acoustic emission detector, electric scale, and so on. The software of the system was developed on advanced virtual instrument (VI) technology. Series of experiments has been made on corns in greenhouse in Hebei grain-and-oil crop graduate school and Tianjin University of Science and Technology. The experiments have shown that acoustic emission of plants has close relation with evaporation and environment factors, such as temperature and humidity, moreover, event counts of acoustic emission from corns are sensitive to water stress. So acoustic emission has been proved to be a good water stress index. The automatic detecting system has been demonstrated to be stable, easily manipulated and could provide accurate output. The system provides a good foundation for further study on this topic and is expected to make extensive applications for its utility.