Monitor and Control of Greenhouse Environment

Theo dõi và kiểm soát môi trường hệ thống nhà kính (green house system).

Appropriate environmental conditions are necessary for optimum plant growth, improved crop yields, and efficient use of water and other resources. Automating the data acquisition process of the soil conditions and various climatic parameters that govern plant growth all ows information to be collected at high frequency withless labor requirements. The existing systems employ PC or SMS-based systems for keeping the user continuously informed of the conditions inside the greenhouse; but are unaffordable, bulky, difficult to maintain and less accepted by the technologically unskilled workers.

Contents:

1. INTRODUCTION
1.1 CURRENT SCENARIO
1.1.1 MANUAL SET-UP:
1.1.2 PARTIALLY AUTOMATED SET-UP:
1.1.3 FULLY- AUTOMATED:
1.2 PROPOSED MODEL FOR AUTOMATION OF GREENHOUSE
2. SYSTEM MODEL .
2.1 BASIC MODEL OF THE SYSTEM .
2.2 PARTS OF THE SYSTEM:
2.2.1 TRANSDUCERS (Data acquisition system) :
2.2.2 ANALOG TO DIGITAL CONVERTER (ADC):
2.2.3 MICROCONTROLLER:
2.2.4 ACTUATORS:
2.2.5 DISPLAY UNIT: .
2.3 STEPS FOLLOWED IN DESIGNING THE SYSTEM:
3. HARDWARE DESCRIPTION
3.1 TRANSDUCERS:
3.1.1 SOIL MOISTURE SENSOR..
3.1.2 LIGHT SENSOR
3.1.3 HUMIDITY SENSOR
3.1.4 TEMPERATURE SENSOR
3.2 ANALOG TO DIGITAL CONVERTER (ADC 0808)
3.2.1 DESCRIPTION
3.2.2 FEATURES
3.2.3 CONVERSION METHOD USED
3.2.4 PIN DIAGRAM OF ADC 0808/0809
3.2.5 SELECTING AN ANALOG CHANNEL
3.3 CLOCK CIRCUITRY FOR ADC:
3.3.1 Functional Description:
3.4 MICROCONTROLLER (AT89S52)
3.4.1 CRITERIA FOR CHOOSING A MICROCONTROLLER
3.4.2 DESCRIPTION:
3.4.3 FEATURES:
3.4.4 PIN CONFIGURATION .
3.4.5 BLOCK DIAGRAM
3.4.6 PIN DESCRIPTION
3.4.7 SPECIAL FUNCTION REGISTERS.
3.4.8 MEMORY ORGANIZATION
3.4.9 WATCHDOG TIMER (One-time Enabled with Reset-out)
3.4.10 TIMERS AND COUNTERS
3.4.11 INTERRUPTS .
3.5 LIQUID CRYSTAL DISPLAY
3.5.1 SIGNALS TO THE LCD
3.5.2 PIN DESCRIPTION
3.6 ALARM CIRCUITRY
3.7 RELAYS
3.8 POWER SUPPLY CONNECTION
CIRCUIT SCHEMATIC OF THE SYSTEM
4. SYSTEMS USED IN WORK MODE
4.1 DRIP IRRIGATION SYSTEM FOR CONTROLLING SOIL MOISTURE
4.2 ARTIFICIAL GROWING LIGHTS FOR CONTROLLING ILLUMINATION
4.3 TEMPERATURE CONTROLLERS
4.3.1 COOLING EQUIPMENT
4.3.2 HEATING EQUIPMENT
4.4 HUMIDIFCATION SYSTEMS
5. SOFTWARE
5.1 INTRODUCTION TO KEIL SOFTWARE
5.1.1 WHAT IS µVision3?
5.1.2 STEPS FOLLOWED IN CREATING AN APPLICATION IN uVision3:
5.1.3 DEVICE DATABASE
5.1.4 PERIPHERAL SIMULATION.
5.2 PROGRAMMER.
5.3 ProLoad PROGRAMMING SOFTWARE
6. Flowcharts .
6.1 FLOWCHART REPRESENTING THE WORKING OF THE SYSTEM
6.2 FLOWCHART FOR LCD INITIALIZATION
7. RESULT ANALYSIS
7.1 TRANSDUCER READINGS .
7.1.1 SOIL MOISTURE SENSOR.
7.1.2 LIGHT SENSOR.
7.1.3 HUMIDITY SENSOR
7.1.4 TEMPERATURE SENSOR
8. ADVANTAGES AND DISADVANTAGES
8.1 ADVANTAGES
8.2 DISADVANTAGES

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