Post on 07-Feb-2016
description
INTELLIGENT WIRELESS VIDEO CAMERA SYSTEM
BY
RAJESH RANJAN PANDA
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INTRODUCTION
WHY? THE REMOTE SENSING PRINCIPLE. BASIC PROCESS UNDERGOING IN THIS PROCESS.
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BASIC OPERATIONAL PRINCIPLE
RANGE AND PORTABILITY. THE UNIT CONTAINS STEPPER MOTOR. ROLE OF CCTV’S INFRARED SENSING CIRCUIT WHICH CONSISTS OF 2 LED’S.
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INFRARED TRANSMITTER / RECEIVER SECTION
This section is designed for detecting the presence of a person who is inside the restricted zone within the range.
Basically an infrared proximity detection system. Basic function of the detector circuit.
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INFRARED TRANSMITTER / RECEIVER SECTION
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IMPORTANCE OF COMPUTER
Main function of the computerOther major function of the computer is to drive the stepper motor.
The software program is written in ‘C’ language.
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HOW THE COMPUTER DRIVES THE STEPPER MOTOR
To drive the stepper motor the system is programmed to produce the pulses in a sequence at four different outputs .
The stepper motor used in this project work is capable to drive up to 3Kg loads, i.e., the holding torque is 3Kg.
The output of the computer is also used to drive the three relays and one buzzer.
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RELAY AND BUZZER CIRCUIT
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Stepper Motor Drive Circuit
The stepper motor having four windings are energized one after another in a sequence .
This motor rotates in step wise and the step angle is 1.80. The driving circuit of the motor is designed using BC 547
and 2N5296 These 2 transistors are common emitter configured. The motor winding when it is energized, it consumes 350
mA approximately.
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Diagram of the stepper motor drive circuit
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TRANSMITTER
The output is fed to this transmitter for transmitting the video signals in AM .
The output of video camera is fed to this carrier input as a modulating wave.
The AM transmitter consists three sections namely (1) VHF Oscillator (2) Driver Stage or Modulator (3) Final Amplifier Stage.
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The Complete Circuit Diagram of transmitter including three stages is as follows
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Conclusion
At the receiving end set of 4” screen is used to display the picture caught.
In this way we can detect the entry of unauthorized persons
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THANK YOU