MONITORING OF HUMIDITY IN SOIL USING
LABVIEW
A
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-
