The Development Of Image Acquisition And Processing System Based On3G For Irrigation Area

Irrigation facilities are geographically dispersed and water management is complex inirrigation area. The traditional monitoring method, which depends on manual informationmonitoring, is time-consuming and its management is chaotic. The embedded Linuxtechnology and image acquisition technology have been studied extensively in various fields.3G wireless transmission, which has advantages of real-time online, switch freely, high-speedtransmission, has been widely used in various industries. In this paper, the image capturetechnology and3G wireless transmission technology are applied to monitor the work situationof all kinds of equipment in irrigation area and a set of image acquisition and processingsystem based on3G is developed. The system has the advantages of low cost, low power,high-speed transmission and so on. The specific research contents are as follows:(1) The system framework is built based on performance requirements and functionalrequirements of the irrigation monitoring device. The system consists of acquisition terminaland PC monitoring center. The acquisition terminal includes embedded MCU system module,image acquisition module,3G wireless transmission module, solar power system module,power management module, power voltage measurement module and backup storage module.The PC monitoring center includes central monitoring mailbox, mailbox management PC andlocal database.(2) In the acquisiton terminal: In order to reduce system power consumption, the powermanagement module is to control the acquisition and data transmission of the acquisitonterminal at interval time, which is realized by the control of the power chip MAX738throughthe10-position rotary selector switch and microcontroller ATtiny25. The microprocessorS3C2440is selected as the core controller and embedded Linux system is selected to be itsoperating system. The AVEO UVC camera which armed with image processing chipAV328C is selected as the image acquisition module and the file name format of the capturedimage is "Acquisition point number+Acquisition Time". The Coolee A100of telecomedition is chosen as the3G wireless transmission module. The U disk of FAT32format is chosen as the backup storage module. The solar panel capacity of the solar power system is20W and the battery capacity is12V10AH. In order to know the voltage of the battery, thecombination of internal AD in S3C2440and sliding rheostat is used to measure the voltage ofthe supply power.(3) In the PC monitoring center: Netease mailbox is used as the data reception center,because the using of the third-party server could reduce the development cost, instead ofcreating additional server. The PC mailbox manager is developed by Visual C#which isbased on.NET platform. The mailbox management PC connects mailbox server via POP3protocol and logs in monitoring mailbox to achieve mail messages receiving, parsing, thenstore picture to local hard disk automatically and regularly. And then ADO.NET data accesstechnology of SQL Server2008database is applied to save the acquisition voltage and imagestorage path. Thus it can facilitate irrigation area managers to query the classified informationin each acquisition point.Multiple acquisition terminal nodes can be distributed across irrigation area. The datainformation of every acquisition terminal node is send to the central monitoring mailbox. Thedesign of embedded image acquisition and processing system takes a combination of3Gwireless transmission technology, embedded Linux technology, image acquisition technologyand database technology. The system has the advantages of low cost, low power, high-speedtransmission, easy to monitor and so on. It can be applied into medium-size irrigation areawhere has a number of scattered monitoring points and it has high application value inirrigation area information monitoring field.