MONITORING Kumar Dr. S.V.S.Prasad (Assistant Professor) External

MONITORING OF HUMIDITY IN SOIL USING LABVIEW                                               AMINIPROJECT REPORT  Submitted in the partial Fulfillment of the requirements for theaward of theDegree of  BACHELOR OF TECHNOLOGYINELECTRONICS AND COMMUNICATION ENGINEERING   Submitted By                         B.AKASH                                                      14R21A0468                        B.ARVIND SURYA KUMAR                    14R21A0465                        B.

LAKSHMAN                                            14R21A0464                        N.AMARENDRA                                         14R21A0494  UNDER THE GUIDANCE OF Mr. G.SHRAVAN KUMAR(ASSISTANT PROFESSOR)   MLR Institute of Technology ( Affiliated to JNTUH, Hyderabad )Dundigal, Hyderabad-5000432014-2018 MLR Institute of Technology Dundigal,Hyderabad-500043  DEPARTMENT OF ELECTRONICS ANDCOMMUNICATION ENGINEERING CERTIFICATE This isto certify that the project entitled ” MONITORING  OF  HUMIDITY IN SOIL USING LABVIEW” is the bonafied work done by, B.Akash(14R21A0468),B.Arvind(14R21A0465), B.

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Lakshman(14R21A0464),N.Amarendra(14R21A0494) in partial fulfillment of the requirement forthe award of the degree of B.Tech in Electronics and Communication Engineering,JNTUH, Hyderabad During the year 2016-2017.                                                Internal Guide                                                               Head of the Department Mr. G.Shravan Kumar                                       Dr.

S.V.S.Prasad(Assistant Professor)   External ExaminerACKNOWLEDGEMENT  We express our profound thanks to themanagement of MLR Institute ofTechnology, Dundigal, Hyderabad, for completing this project.             We take immense pleasure inexpressing my sincere thanks to Dr. K.

Srinivas Rao, Principal, MLR Institute of Technology, for his kind supportand encouragement. We are very much grateful to DrS.V.S. Prasad, Professor& Head of the Department, MLR Institute of Technology,for permitting me to do the project and encouraged me with his valuablesuggestions. We are very much grateful toMr.

G.Shravan Kumar (Asstprof)  for his unflinching cooperation through theproject.       We would like to express our sincerethanks to the teaching and non-teaching faculty members of ECE Dept.

, MLR Instituteof Technology, who extended their help to us in making our project worksuccessful.                                                                                 PROJECT ASSOCIATES:B.AKASH                                                      14R21A0468                        B.ARVIND SURYA KUMAR                    14R21A0465                        B.LAKSHMAN                                            14R21A0464                        N.

AMARENDRA                                         14R21A0494           ABSTRACT The purpose of our project is to  monitor and control of relative humidity insoil. It involves the measuring and the monitoring of the humidity and relativehumidity using Virtual Instrumentation LabVIEW. The humidity circuit is builtin LabVIEW software.The output is indicated by the glowing of the LED at thesoil’s wet condition. Soil is made up of a mixture of components, includingmineral and organic particles, with water and air making up the spaces inbetween.

Plants need a combination of all these components for healthy growth.By measuring soil moisture, crop water needs to be assessed and irrigationcontrolled, so as to maximize crop yield, quality and profitability. There arevarious methodologies and techniques by which the soil moisture could bemeasured such as Gravimetric Technique,Radioactive Technique,CapacitiveTechnique, Conductivity Technique.Humidity can be preciselydefined as a amountofwater vapour in air.The necessity of humidity measurement in soilis that you cangain control of soil moistureand adjust irrigation according to the need.The humidity sensorconsists of two probes from the circuit that will be in contact with the soil which senses the moisture content.

 A graphical block diagram is developed in LabVIEW, which includes the calculation ofrelativehumidityin percentage  and the output voltage in volts, which isin the range of (0-2V) for dry soil and (4-7V) for wet condition. The base unit is a humiditysensor which senses the moisture content and we can visualize the output on a PC based Labview system.Relative humidityis the ratio of the current absolute humidityto the highest possible absolute humidity(which depends on thecurrent air temperature).

A reading of 100% means that the air is totally saturated with water vapour and cannothold anymore. The relative humidity of the soil depends on the moisture content in the soil. The drier the soil, the lesser the relativehumidity and thereforetherecomes a requirementoftreating thesoil with water for irrigation purposes. Keywords:Humidity,Relative Humidity,Soil moisture sensor,DAQ(Data acquisition),LabVIEW. TABLE OF CONTENTS              CERTIFICATE                                                               I              ACKNOWLEDGEMENT                                                        II              ABSTRACT                                                                     III                               CHAPTER1:       INTRODUCTION                                                                  7-8                                    1.

1       Objective and goal ofthe project                                           7                                     1.2      Project Overview                                                                             7                       1.2.1   ExistingMethod                                                                              7                                1.2.2  Relative Humidity                                                                             8 CHAPTER2:         LabVIEW                                                                                 9-12                          2.

1         Introduction to LabVIEW                                                             9                        2.1.1      History                                                                                             10                        2.1.2     Characteristics                                                                                 12  CHAPTER 3:            DAQ(Data acquisition (DAQ):                                           13-15                        3.1       Introduvtion to DAQ                                                                        13                        3.

1.1    Channelsin DAQ                                                                              14                        3.1.2    Purpose                                                                                              15   CHAPTER 4:                       Sensor                                                                  16-18                   4.

1    Definition                                                                      16                   4.2     Humidity Sensor                                                           174.3     Soil Moisture Sensor                                                     18 CHAPTER 5:                        Hardware Design Approach and Result                             19-20                        5.

1       Circuit Diagram                                                                                19                        5.2       Design of Circuit                                                                               19                        5.3       Design Output                                                                                   20 CHAPTER 6:                        Software Design Approach and Result                               21-24                        6.1       Logic Diagram                                                                                   21                        6.

2       Design Output                                                                                   226.3       Software Tools in LabVIEW                                                           23 CHAPTER7:     CONCLUSION                                                                                      25                                                                                                       REFERENCE                                                                                      25       CHAPTER – IINTRODUCTION1.1 Objective and goal of the projectThe main aim of our projectis to  monitor and control of relativehumidity in soil and it involves the measuring and the monitoring of thehumidity and relative humidity using Virtual Instrumentation LabVIEW.1.2 Project Overview   Thehumidity circuit is built in LabVIEW software.

The output is indicated by theglowing of the LED at the soil’s wet condition.Humidity can beprecisely defined as a amount of water vapour in air.The necessity of humidity measurement in soilis that you cangain control of soil moistureand adjust irrigation according to the need.

The voltage across the output is acquired using NI DAQ-6008 which is interfaced with the PC.The humidity sensor consistsof two probesfromthecircuit that will be in contact with the soil which senses the moisture content.1.

2.1 Existing Method A graphical block diagram is developed in LabVIEW, which includes the calculation ofrelativehumidityin percentage  and the output voltage in volts, which isin the range of (0-2V) for dry soil and (4-7V) for wet condition. The base unit is a humiditysensor which senses the moisture content and we can visualize the output on a PC based Labview system.Relative humidityis the ratio of the current absolute humidityto the highest possible absolute humidity(which depends on thecurrent air temperature). A reading of 100% means that the air is totally saturated with water vapour and cannothold anymore.

The relative humidity of the soil depends on the moisture content in the soil. The drier the soil, the lesser the relativehumidity and thereforetherecomes a requirementoftreating thesoil with water for irrigation purposes.Humidity can be preciselydefined as a amountofwater vapour in air.The necessity of humidity measurement in soilis that you cangain control of soil moistureand adjust irrigation according to the need.The voltage across the output is acquired using NI DAQ-

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