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    Agricultural Science and Technology - Irrigation Control System

    来源:本站  最后更新:2017-06-08 17:00:08  作者:中农天陆  浏览:853次

    1, water and fertilizer management and control system
      (1) function
      In the drip irrigation, infiltration irrigation, micro-sprinkler irrigation and other projects on the basis of water-saving, through the layout of the water measuring probe in the field measured soil moisture status, through the regular determination of soil nutrient status, the sensor will be the water and fertilizer signal to the computer, The program intelligence guides the technical system of irrigation and fertilization. The technology to achieve the channel irrigation to the pipeline water, from pouring to the pouring of crops, water and fertilizer separately to the integration of water and fertilizer, soil fertilization to crop fertilization, a single management to integrated management, traditional agriculture to modern agriculture.
      Water and fertilizer integration is the use of pipeline irrigation system will dissolve fertilizer in water, with irrigation for fertilization, timely and appropriate to meet the needs of crops on the water and nutrients to achieve water and fertilizer synchronization management and efficient use of agricultural production technology. The system consists of solenoid valves, fertilizers, soil moisture sensors, computer control terminals, related software and automatic control system, each system can control more than 10 greenhouse or plastic greenhouses. With the traditional flood irrigation fertilization compared to about 50% water saving, about 40% of fertilizer, water saving effect is significant.

     

     

      (2) technical points
      1) micro-irrigation
      According to the water quality of the water situation, terrain changes (greenhouse no such problem) planting area, crop species, fertilization and other factors, choose a different micro-irrigation fertilization system. Greenhouse irrigation generally choose drip irrigation or micro-spray form, fertilizers can choose Venturi extractor, pressure fertilization tank, etc., conditional optional automatic irrigation and fertilization system.
      2) the development of irrigation and fertilizer system
      According to the law of fertilizer requirement, the soil real-time fertility level and target yield should be determined according to the daily fertilizer requirement, crop growth period and so on to determine the irrigation quota, and the irrigation system should be formed. The total fertilization rate, the ratio of nitrogen, The proportion of the formation of fertilization system, micro-irrigation fertilization system applied base fertilizer and traditional fertilization methods, can include a variety of organic fertilizer and a variety of fertilizers, especially compound fertilizer, promote the use of farm manure as base fertilizer. Ammunition Note that micro-irrigation top dressing must be soluble fertilizer.
      3) supporting technology
      To play the advantages of water and fertilizer integration technology, in the selection of fine varieties of crops, to strengthen the field management on the basis of plastic film can also be used to form the film under the form of micro-irrigation. Practice has proved that the membrane micro-irrigation water and fertilizer integration technology to improve the micro-environment, reduce the incidence of pests and diseases more obvious.

     

     

    2, field irrigation control system
      (1) function
      Daejeon cultivation due to the larger area, plots are widely distributed, making irrigation commonly used typical water pipe or regional flood irrigation and other means. The Daejeon Irrigation Intelligent Control System divides the field into several planting areas. In the form of trunk irrigation and branch irrigation, the soil drought information is transmitted to the control center by means of the moisture sensors distributed in different planting areas. The control center is controlled by the soil evaporation model , Different crops of the day irrigation strategy, different growth stages of irrigation strategies and other logic to scientific, accurate, automatic irrigation, to achieve on-demand irrigation, saving water.
      (2) technical points
      1) data collection
      System acquisition: outdoor weather (such as: temperature, humidity, wind speed, rainfall, light and other environmental parameters) soil moisture (such as soil temperature, different depth of soil moisture, etc.). In each collection terminal to install the concept of GPS2 Internet of Things and technology positioning module, so sent to the monitoring center computer to collect information on the data with geographical coordinates, the monitoring center computer based on the data from the geographical coordinates can also be determined The exact location of the collection points, so that the location of the collection points on the map can be compared to ensure the accuracy of the information collected. In addition, the terminal collection unit placed in the farmland, you can use the "solar panel + battery" in the form of power supply for the acquisition unit, which can save resources and can not ensure that the lack of electricity due to data loss.
      2) Irrigation control
      The system can be set up: automatic irrigation, regular irrigation, periodic irrigation, manual irrigation, etc., according to the actual needs of the flexible selection of control mode. Can be set and to achieve centralized control in the control room, SMS, on-site remote control and on-site manual and other ways to control.
      3) alarm function
      When the irrigation exceeds or falls below the set value, or if the system fails, such as water pipe rupture, stop the pump immediately, open the alarm.
      4) Communication methods
      Due to the large area of ​​the field, irrigation control usually uses wireless communication. Through the short-range distributed networking technology will gather information collected to the data node, and then through the telecom operators products (such as 2G, 3G) through GPRS to the data center.
      5) Central control
      Providing field water saving irrigation real-time monitoring services, field water-saving irrigation intelligent analysis and control services and Daejeon water-saving irrigation management services, application server processing business logic is the core of the entire system, issued control instructions, including irrigation valve control, Flushing filter control and precise irrigation control.

     

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