PROJECT BACKGROUND
Water
is the most important element in our life. Without it, we cannot survive.
Watering system can be defined as a system to deliver water to the plants/crops
in a greenhouse. These types vary from simple ones to most sophisticated
systems and you have to choose the best suited one for your plants. In short,
such system takes care of the water requirements of plants and totally eliminates
manual watering.
One
of the major factors influencing crop growth is the temperature. Different crop
species have different optimum growing temperatures and these optimum
temperatures can be different for the root and the shoot environment and for
the different growth stages during the life of the crop. If a greenhouse were like
a residential or commercial building, controlling the temperature would be much
easier since these buildings are insulated so that the impact of outside
conditions is significantly reduced. A high relative humidity (above 80-85%)
should be avoided because it can increase the incidence of disease and reduce
plant transpiration [1].
In
keeping abreast technology, Development of Humidity Control and Automatic
Greenhouse Watering System is created.
This project is constructed to provide opportunity the gardener to
manage their crops. The heart of this
project is microcontroller. This system has capability to control the watering
system, LDR Light sensor, temperature and humidity in a greenhouse environment. Three
sensors are used in this project. Temperature sensor will measure the condition
in a greenhouse. The high temperature levels have to increase productivity,
quality and earliness. Humidity sensor will be used as it is capable of
detecting humidity levels. Most greenhouse plants tend to grow better at higher
relative humidity. The LDR light sensor is needed to detect the lighting
conditions in a greenhouse. It is able to turn on artificial lighting when
there is insufficient light.
PROBLEM STATEMENT
Watering system is the most important thing on a
greenhouse system. The water we provide, which is the main element, will make
sure the plants survive on certain circumstances. As we all know, most of the
gardener use the manual system to water their plant but this system is not
efficient. The plants will either die if there is not enough water supplies to
the plant or vice versa. Each plant species has
an optimum temperature range. Heating devices
will maintain the temperature within that range
during periods of cold weather. Many
greenhouse crops are bred for higher humidity. If grown outside, in lower
humidity environments, they usually perform poorly.
In
order to maintain the condition and overcome the problem, the development of
humidity control and automatic greenhouse watering system is used. This system
is created to reduce the time if using automatic system rather than manual way
of watering. In other side, temperature and humidity sensor will control the
condition in a greenhouse. For example, where temperature sensor detects is too
hot condition in a greenhouse then microcontroller will send the signal to the
cooling fan to maintain condition in a greenhouse. Fewer workers are needed to
maintain the plants.
OBJECTIVES
The
objective of this project is to design and develop
humidity control and automatic
greenhouse watering system. This system are
allow to control the amount of water
delivered to the plants when it is needed based on types of plants. It
also can detect and control the temperature and relative humidity in a greenhouse.
PROJECT SCOPE
This project is about
controlling system which is control the humidity and also watering system. Sensor
used to control the temperature, humidity and lighting condition in a
greenhouse. The aquarium pump is used to
supply water to the plant in a greenhouse when it needed. Other than that, the
controller (PIC16F877A) as a main part in this project is used to control
overall system in a greenhouse. All the part involves in a greenhouse will be
control by PIC.
