Green house weather control system

MONITORING AND CONTROL OF WEATHER SYSTEMOF GREENHOUSE

BY:-VEERENDRA KR. MISHRAHIMANSHU YADAVSHIVEN VASHISHTKARAN NAGAR

GUIDED BY:-MR. AKHILESH YADAV(ASST. PROF.) DEP. OF ET/EC

Greenhouses form an important part of the agriculture and horticulture sectors in our country.

They can be used to grow plants under controlled climatic conditions for optimum production.

Automatic monitoring and controlling of the climatic parameters which directly or indirectly govern the plant growth and hence their production.

IntroductionAutomatic Greenhouse

weather control

Greenhouse effect

Traps the infrared rays from sunlight

Increases the level of CO2

Increases the amount of chlorophyll

Plant health and growth is impressive

Our Objective

Our objective is to create a system that reacts and controls the weather Inside a greenhouse.We are here working on a response system which changes with the change in climatic condition on four parameters.

HumiditySoil MoistureLightTemperature

Each of the parameter will have a predefined functioning solution to it.

Pert Chart

Team member working

Our team

Block Diagram Of the Proposed Project

PIC16F887 Controller

Soil moisture Sensor Humidity Sensor

Temperature Sensor Light sensor

Sprayer

Water Pump

EncoderHT12E

AC

O U T P U T D R I V E R

Light

16*2 LCD

RF Transmitter

RF Receiver

DecoderHT12D

analo

g

digital

digital

digital

digital ST-TX10-ASK

ST-RX10-ASK

Circuit

circuit

Sensors (Data acquisition system) :-Temperature sensor (LM35)Humidity sensor (T110)Light sensor (LDR)Moisture sensor (S510)

Microcontroller (PIC16F887) Liquid Crystal Display (Hitachi's HD44780) Actuators – Relays Devices controlled :- Water pump (simulated as a bulb) Sprayer (simulated as a bulb)

Cooler (simulated as a fan)Artificial Lights (simulated as 2 bulbs)

PARTS

Sensors:• This part of the system consists of various

sensors, namely humidity, temperature and light. These sensors sense various parameters- temperature, humidity and light intensity and then converts the Analog signal to Digital signal.

PIC16F887•The microcontroller PIC16F887 A 40 PIN IC is the heart of the proposed embedded system.•It constantly monitors the digitized parameters of the various sensors and verifies them with the predefined threshold values•If any action is to be taken for the condition at that instant of time. In case such a situation arises, it activates the actuators to perform a controlled operation.

Actuator:• An array of actuators can be used in the

system such as relays and change over switches etc.

• They are used to turn on AC devices such as motors, coolers, pumps, sprayers.

• A complete working system can be realized by connecting corresponding devices.

Display Unit:•A Liquid crystal display is used to indicate the present status of parameters and the respective AC devises (simulated using bulbs).

Hitachi 16x2 HD44780

Power supply: The power supply section consists of step down

transformers of 230V primary to 12V secondary voltages for the +5V power supplies respectively.

The stepped down voltage is then rectified by 41N4007 diodes. The rectified voltage from the 4 diodes is given to

pin 1 of the respective regulators. Pin 2 of the regulators is connected to ground and pin 3 to Vcc.

WORKING

The MC78XX/LM78XX/MC78XXA series of three terminal positive regulators are available in the TO-220/D-PAK package and with several fixed output voltages, making them useful in a wide range of applications.

REGULATOR(LM78XX SERIES)

A temperature sensor (LM35DZ) can measure from 0°C to 100°C. However, the output is 0V at 2°C. The output of a sensor goes up by 10mV for each 1°C. The output voltage in 32°C is 300mV.

If the temperature rises to its critical value then sensor is activated.

TEMPERATURE SENSOR

LM35DZ

The humidity sensor(T110) SYS-1used for sensing the humidity.

Relative humidity is a measure, in percentage, of the vapour in the air compared to the total amount of vapour that could be held in the air at a given temperature.

Features:-• Linear voltage output• Low power design

• Fast response time• High accuracy

HUMIDITY SENSOR(T110)

T1-10

When the control is done automatically, the light intensity in the green house is sensed by a photosensor and a signal in the form of voltage is sent to the microcontroller.

A photocell is a light responding silicon chip that converts incident radiant energy into an electrical signal.

The LDR light sensor is used to sense intensity of light.

LIGHT INTENSITY SENSOR

LDRLM358

The display section consists of 16*2 LCD, which used to display summary of IC being inserted and result of test being conducted.

LCDs can add a lot to your application in terms of providing an useful interface for the user, giving it a "professional" look. The most common type of LCD controller is the Hitachi 44780 which provides a relatively simple interface between a processor and an LCD.

DISPLAY SECTION

The relay takes advantage of the fact that when electricity flows through a coil, it becomes an electromagnet. The electromagnetic coil attracts a steel plate, which is attached to a switch. So the switch's motion (ON and OFF) is controlled by the current flowing to the coil, or not, respectively.

A very useful feature of a relay is that it can be used to electrically isolate different parts of a circuit. It will allow a low voltage circuit (e.g. 5VDC) to switch the power in a high voltage circuit (e.g. 100 VAC or more).

The relay operates mechanically, so it can not operate at high speed.

RELAYS

Increase fertility Better productivity Increase in quality of crop Percentage of germination of seeds is high

in green house

ADVANTAGES

REFERENCES

Datasheet of PIC16F887 Microcontroller

Datasheet of sensors used

Datasheet of Encoder HT12E

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