Automatic Irrigation System

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AUTOMATED IRRIGA IRRI GATION TION IN AGRICUL AGRIC ULTURE TURE USIN USING G PLC & SCADA B Y: S IM RA N K AU R( 0 4 91 3 2 04 9 1 4) GAGANDEEP VIRDI(03413204914)  Automated Irrigation Irrigation Syste

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Contents 2 

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Introduction Block diagram

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Introduction 3 

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In the world of advance electronics, life of human  beings should be simpler hence to make life more simpler and convenient, we have made “AUTOMATIC PLANT IRRIGATION SYSTEM”. A model of controlling irrigation facilities to help millions of people. The model shows the basic switching mechanism of Water motor using sensors from any part of field by sensing the moisture present in the soil.

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Block Diagram 4

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Idea of Project 5 

Water Conservation through Drip Irrigation :

Our initial idea of project in Agriculture started with water problems of farmers. We decided to make a fully controlled irrigation system. Additional feature of this project with drip irrigation was soil moisture detection and supplying the water to the field 

Increased Yield:

To avoid the damage due to uncertainty from climatic  parameters like rainfall, temperature, etc.

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Cont…. 6 

Automatic Fertilizer Spray System:

To make the work more time efficient we have added a fertilizer tank from which the chemical will be added into the main water tank. The water pump will drag the fertilizer chemical directly to the crops. This will result in proper substitution for manual human labor.

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Schematic Diagram 7

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Working 8 

As we select a particular crop in the SCADA, all the  parameters will be loaded on the PLC. 

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Example: Days of crop = 90, Irrigation Interval = 24hrs, required temperature = below 40’C gets loaded on PLC. PLC will send commands to all the modules.

Initially, Water is drawn from the source (e.g. Well, Dam, Reservoir) by motor and is stored in the water tank. To fill the tank with sufficient amount of water, a level sensor is provided.

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Cont…. 9 

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Level sensor senses the water level in the tank. If the level in the tank is below a Mid level, level sensor signals the PLC and motor is turned on. Level sensor senses the water level in the tank. If the level in the tank is below a Mid level, level sensor signals the PLC and motor is turned on. When the water level is reaches high level, motor is automatically turned off. The water in the tank is always maintained at the High level.

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Cont…. 10 

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The amount of water to be given to the field is determined by the  pre determined settings loaded in PLC. Different crops have different pre determined settings. The humidity sensor circuit is used for maintaining the proper amount of water as per the crop requirement. The relay is turned ON if the humidity drops a set point. The normally open contact of relay gives a signal to PLC. The solenoid valve automatically turns ON after receiving a  proportional output signal from PLC.

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Cont… 11 

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It is impossible to keep control and supervision on all agricultural activities manually. Some automated tool is required which can control, supervise, collect data, analyze data and generate reports. A unique solution is introduced to meet all this demand is SCADA system. Using SCADA we can monitor the whole system sitting at home. Any malfunction of the hardware can also be detected through SCADA system.

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Ladder Logic Diagram 12

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Programming 13 

The PLC is programmed with the above Ladder Logic Diagram with the following program code: 

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IF S1=90%; then S1=OFF;

IF S2