Design On Data Collecting Unit For Irrigation District Based On S3C2440

Water as one kind of natural resources for human production and lifeindispensable, is the necessary condition to keep the regional continuousdevelopment. In our country, on the economic basis of agricultural production asa major agricultural congress to consume a lot of fresh water resources inirrigation, and China’s national conditions is the lack of fresh water resources.Irrigation water reasonably diversion water not only to reasonably deal with thelack of fresh water resources in our country and agriculture irrigation conflictbetween huge demand, but also can promote the construction of agriculturalinformationization in our country.Based on the irrigation district environment as the research object, in view ofthe irrigation area precipitation (rain and snow), water level, water flow etc.environmental data collecting.Design a data collecting unit based on S3C2440irrigation district, realize the data real-time monitoring of the irrigation districtenvironment.Master control chip adopted a Samsung S3C2440processor based on ARM9kernel. Analog acquisition circuit selects the TI company’s serial12bit TLC2543A/D converter, able to form two analog signal collecting channel. Can to connectwater level sensor in one of the analog collecting channel. Tipping bucket rainsensor directly connected to the CPU counter, rainfall information is received bycalculation of pulse number. Flow sensor is connected to the CPU through theRS485interface. The three kinds of environmental sensor data collectingapplication different interface connected to the CPU, will not affect each other.In order to ensure the irrigation district environment data were collected ontime accurate transmitted to remote data center, using a variety of datatransmission means to transmitted the irrigation district environment data. GTM-900c data transmission module can be transmit the collected data through GPRS or GSM short message in the case of a good network signal. When the networksignal is bad or coverage area no networks signal on the use of digital radio tosend the collected data out.In software design to design online forever and low power consumption bothworking mode, also increased the application of the remote online upgradefunction, effectively reduce the data collecting unit upgrade and maintenancecosts.Irrigation data acquisition unit has been tested in this design, can be stableand reliable operation, meets the design specifications, the precision of collectingdata within the scope of the design requirements. In this paper, the research has acertain significance for the results of irrigation area information construction.