MONITORING to the management of MLR Institute of Technology,

MONITORING OF HUMIDITY IN SOIL USING 
LABVIEW

                                               A

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MINI
PROJECT REPORT

 

 

Submitted in the partial Fulfillment of the requirements for the
award of the

Degree of

 

BACHELOR OF TECHNOLOGY

IN

ELECTRONICS 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-500043

2014-2018

 

MLR Institute of Technology

 

Dundigal,
Hyderabad-500043

 

 

DEPARTMENT OF ELECTRONICS AND
COMMUNICATION ENGINEERING

 

CERTIFICATE

 

This is
to 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.Lakshman(14R21A0464),

N.Amarendra(14R21A0494) in partial fulfillment of the requirement for
the 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 Examiner

ACKNOWLEDGEMENT

 

 We express our profound thanks to the
management of MLR Institute of
Technology, Dundigal, Hyderabad, for completing this project.

 

            We take immense pleasure in
expressing my sincere thanks to Dr. K.
Srinivas Rao, Principal, MLR Institute of Technology, for his kind support
and encouragement.

 

We are very much grateful to Dr
S.V.S. Prasad, Professor& Head of the Department, MLR Institute of Technology,
for permitting me to do the project and encouraged me with his valuable
suggestions.

 

We are very much grateful to
Mr. G.Shravan Kumar (Asst
prof)  for his unflinching cooperation through the
project.

 

      We would like to express our sincere
thanks to the teaching and non-teaching faculty members of ECE Dept., MLR Institute
of Technology, who extended their help to us in making our project work
successful.

                                               

                                 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 in
soil. It involves the measuring and the monitoring of the humidity and relative
humidity using Virtual Instrumentation LabVIEW. The humidity circuit is built
in LabVIEW software.The output is indicated by the glowing of the LED at the
soil’s wet condition. Soil is made up of a mixture of components, including
mineral and organic particles, with water and air making up the spaces in
between. Plants need a combination of all these components for healthy growth.
By measuring soil moisture, crop water needs to be assessed and irrigation
controlled, so as to maximize crop yield, quality and profitability.

There are
various methodologies and techniques by which the soil moisture could be
measured such as Gravimetric Technique,Radioactive Technique,Capacitive
Technique, Conductivity Technique.Humidity can be precisely
defined as a amount
of
water vapour in air.The necessity of humidity measurement in soil
is that you can
gain control of soil moisture
and adjust irrigation according to the need.The humidity sensor
consists 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 of
relative
humidity
in percentage  and the output voltage in volts, which is
in the range of (0-2V) for dry soil and (4-7V) for wet condition. The base unit is a humidity
sensor which senses the moisture content and we can visualize the output on a PC based Labview system.Relative humidity
is the ratio of the current absolute humidity
to the highest possible absolute humidity
(which depends on the
current air temperature).

A reading of 100% means that the air is totally saturated with water vapour and cannot
hold anymore. The relative humidity of the soil depends on the moisture content in the soil. The drier the soil, the lesser the relative
humidity and therefore
there
comes a requirement
of
treating the
soil 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

          

                  

 

CHAPTER
1:       INTRODUCTION                                                       
           7-8                         

          1.1       Objective and goal of
the project                                           7               

                     1.2      Project Overview                                                                             7 

                     1.2.1   Existing
Method                                               
                               7          

                     1.2.2  
Relative Humidity                                                                             8

 

CHAPTER
2:         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    Channels
in DAQ                                                                              14

                        3.1.2    Purpose                                                                                              15

 

 

 

CHAPTER 4:                       Sensor                                                                  16-18

                   4.1
    Definition                                                                      16

                   4.2     Humidity Sensor                                                           17

4.3     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                                                                                   22

6.3       Software Tools in LabVIEW                                                           23

 

CHAPTER
7:     CONCLUSION                                                                       
               25                                                                          

                             REFERENCE                                                  
                                    25

 

 

 

 

   CHAPTER – I

INTRODUCTION

1.1 Objective and goal of the project

The main aim of our project
is to  monitor and control of relative
humidity in soil and it involves the measuring and the monitoring of the
humidity and relative humidity using Virtual Instrumentation LabVIEW.

1.2 Project Overview  

The
humidity circuit is built in LabVIEW software.The output is indicated by the
glowing of the LED at the soil’s wet condition.Humidity can be
precisely defined as a amount of water vapour in air.The necessity of humidity measurement in soil
is that you can
gain control of soil moisture
and 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 consists
of two probes
from
the
circuit 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 of
relative
humidity
in percentage  and the output voltage in volts, which is
in the range of (0-2V) for dry soil and (4-7V) for wet condition. The base unit is a humidity
sensor which senses the moisture content and we can visualize the output on a PC based Labview system.Relative humidity
is the ratio of the current absolute humidity
to the highest possible absolute humidity
(which depends on the
current air temperature).

 A reading of 100% means that the air is totally saturated with water vapour and cannot
hold anymore. The relative humidity of the soil depends on the moisture content in the soil. The drier the soil, the lesser the relative
humidity and therefore
there
comes a requirement
of
treating the
soil with water for irrigation purposes.

Humidity can be precisely
defined as a amount
of
water vapour in air.The necessity of humidity measurement in soil
is that you can
gain control of soil moisture
and adjust irrigation according to the need.The voltage across the output is acquired using NI DAQ-