HERRAMIENTAS DE ORIENTACIÓN ESPACIAL - ROBÓTICAFull description
robot
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In the present situation of many countries; unmanned systems is very important to minimize human losses. So this robot is very useful to do activities like detecting bomb. This project aim i…Full description
HERRAMIENTAS DE ORIENTACIÓN ESPACIAL - ROBÓTICADescripción completa
Book for protection against car bombs and other explosives.Full description
Orchestra
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Presented as part of an online course on school safety. This guide addresses the problem of bomb threats in schools, public or private, kindergarten through 12th grade. The guide reviews the…Descripción completa
INTRODUCTION Click to edit Master subtitle style DESCRIPTION APPLICATION ADVANTAGES
ROBOTIC BOMB DETECTION AND DIFFUSION
INTRODUCTION Click to edit Master subtitle style DESCRIPTION APPLICATION ADVANTAGES
INTRODUCTION
It is a robot which gives alarm when it interfaces with a metal or bomb It is a computer co mputer controlled robot with a navigable camera It can be operated in remote areas areas as it is wireless controlled robot 3/26/12
DESCRIPTION Ø SOFTWARE
… LABVIEW Ø HARDWARE
… TRANSMITTING MODULE … RECEIVER MODULE 3/26/12
SOFTWARE:LABVIEW v
Graphical interface version enables us in smart controlling.
v
We use labview to communicate with the hardware such as data acquisition,vision and motion control devices.
v
We use parallel port programming for control of robot.
v
It is also called as Application Specific 3/26/12
Parallel port programming Ø WHY
ONLY PARALLEL PORT ???
In serial ports, there will be two data lines: One transmission line and one receive line. To send a data in serial port, we have 3/26/12 with to send one bit after another
HOW TO PROGRAMME ???
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Ø The
Parallel
Port Now we can say that to communicate through arallel ort ou should 3/26/12
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FIG: BLOCK DIAGRAM OF KEY/BUTTON IDENTIFICATION
FIG: BLOCK DIAGRAM USED FOR GENERATING OUTPUT BITS
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HARDWARE TRANSMITTER MODULE
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RECEVING MODULE Click to editMODULE RECEVING Master subtitle style
ISOLATOR We use optocoupler as isolator The basic purpose of isolator is to protect our pc from hardware i.e; to avoid direct signal connection.
There are many situations where signals and data need to be transferred from one sub system to another within a piece of electronics equipment or from one piece of equipment to another without making direct ohmic connection. 3/26/12
Relays can of course provide this kind of isolation , but even small relays tend to be fairly bulky compared with IC’s and many of the today’s other miniature circuit components. Because they are electro-machanical, relays are also not reliable and only capable of relatively low speed operation where small size, higher speed and greater reliability are important .A much better alternative is to use an optocoupler. There we use a beam light to transmit the signals or data across an electrical barrier and achieve excellent isolation .
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ENCODERS/DECODERS The bits we get from the pc(labview) are 8 in number.This might be tough to transmit all 8 bits individually to the transmitter section.so,we use 8 bit encoder/decoder to convert and regenerate into a single signal.
Ht 640/s encoder
Ht648/L decoder 3/26/12
ENCODER APPLICATION CIRCUIT
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DECODER
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TRANSMITTER/RECEIVER MODULE
It is a 433MHZ radio metric limited to 100mts Rx/Tx modules.
It is of 5v supply having a small antenna.
We use directly pre-existing modules.
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DIGITAL LOGIC CIRCUIT The bits obtained from the receiver to be manipulated for driving the specific motors we need a demultiplexer logical circuit of 28 data lines .A digital logic circuit is to be designed with 8 input lines for 28 output data lines using digital logic circuitry. The simple operation of demux can be obtained by using logic gates(and,or,nand….). Let us consider the data is 00000001.Then the function of output for this particular data bit is (d0*d1’*d2’*d3’*d4’*d5’*d6’*d7’) 3/26/12
DC MOTOR DRIVERS The term "H-bridge" is derived from the typical graphical representation of such a circuit. An H-bridge is built with four switches (solid-state or mechanical). When the switches S1 and S4 (according to the first figure) are closed (and S2 and S3 are open) a positive voltage will be applied across the motor. By opening S1 and S4 switches and closing S2 and S3 switches, this voltage is reversed, allowing reverse operation of the motor.
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s1 s2 s3 s4 result 1 0 0 1 right 0 1 1 0 left 0 0 0 0 free running 0 1 0 1 break 1
0 1 0
break
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H-bridge circuit
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DC MOTORS
In any electric motor, operation is based on simple electromagnetism. A current-carrying conductor generates a magnetic field; when this is then placed in an external magnetic field, it will experience a force proportional to the current in the conductor, and to the strength of the external magnetic field. As you are well aware of from 3/26/12
Let's start by looking at a simple 2-pole DC electric motor (here red represents a magnet or winding with a "North" polarization, while green represents a magnet or winding with a "South" polarization).
N∞ V (speed is proportional to voltage)
at constant voltage motor drives with constant speed
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Bomb Detection Circuit The circuit described here is a metal detector.the operation of circuit is based on superheterodying principle which is commonly used in superhet receivers.
The circuit utilises RF oscillators.
The frquencies of both oscillators are fixed at 5.5MHZ.
The first RF oscillator comprises transistor T1(BF 494) and 5.5MHZ ceramic filter commonly used in T.V sound Ifsection.
The second oscillator is a colpitt oscillator realised with the help of transistor T3(BF 494) and inductor L1 shunted by trimmer capacitor vc1.
These two oscillator frequencies(Fx and Fy) are mixed in a mixer transistor T2(BF 494) and the difference or beat frequency(Fx-Fy) output from collector of transistor T2 is 3/26/12
The output is a pulsating dc which is passed through a low pass filter realised with the help of 10k resistor R12 and two 15 nF capacitors c6 and c10.
It is then passed to AF amplifier IC1(2822m) via volume control VR1 and the output is fed to 8ohm/1W speaker.
The inductor L1 can be constructed using 15turns of 25SWG wire on a 10cm diameter aircore former and then cementing it with insulating varnish.
For proper operation of circuit,it 3/26/12 is critical
