Multi directional conductive metal detection robot Presented by Venkata Bhavana. P 12C51A0458 Sahithi. V 12C51A0477 SAI SPURTHI INSTITUTE OF TECHNOLOGY
Multi directional conductive metal detection robot
Presented by
Venkata Bhavana. P12C51A0458
Sahithi. V12C51A0477
SAI SPURTHI INSTITUTE OF TECHNOLOGY
Contents Introduction Existing state Construction Working Metal detection Applications and
future scope Conclusion
INTRODUCTION Robotics will play a vital role in our daily applications. Robot may be either guided or autonomous. The mechanical Structures are interfaced to electronics circuit to drive the robot. In general robot is controlled by using flash magic software.
Now a days, we use metal detecting robots which will twist total structure to change its direction
This may be give unfruitful result for low space and uneven surface conditions
EXISTING STATE
In order to overcome the above disabilities, using sophisticated technology a multi directional metal detection robot(MDR) was constructed
Block diagram
Transmission section includes a personal computer which contains a code and ZigBee which is a transceiver and acts as a wireless communication channel of range 100mts.
CONSTRUCTION
pc ZigBee ZigBee mc
MDLEDMotorBuzzer
TRANSMITTER RECIEVER
A metal detector, LED, motor L293D, buzzer are interfaced with receiver
The micro controller will enable the motor driving circuit to traverse the MDR accordingly
Receiver section consists of another ZigBee which sends data to micro controller (89S52)
Fig.4 Top view of the MDR
Fig . 1 Simulation Circuit diagram of the Receiver
Communication MDR was constructed in a square shape
using noncorrosive material It was guided remotely using wireless
communication Between MDR control unit and control
room, low power short range communication is established
Hyper terminal Hyper terminal is a program that records
the messages passed to and from PC to the receiving circuit
Commands can be sent to MDR directly via hyper terminal
Hyper terminal is configured with baud rate of 9600
Messages at hyper terminal
Fig. 9 Messages at hyper terminal
The state of execution will be resend to hyper terminal as a command ‘X’ for successful execution and ‘E’ for an error
Wheels arrangement Five number of 100 rpm DC motors are
used, out of which 4 are used to control the movement of 4 multi directional wheels
One DC motor is located at the center point to transmit the signals
Gear assembly of MDR To fix the motion and direction of MDR ,
heavy duty plastic gear assembly is used
Fig.2 Gear assembly of MDR (Bottom View)
METAL DETECTOR Round shaped concentric coil is used for
MDR EMI principle is adapted by applying AC to
coil which induces EMF The magnetic field of coil is used to detect
the metal objects Due to this current is influenced on the
metal resulting generation of opposite current
Fig.5 Concentric coil metal detector view
Fig.3 MDR Structural front view
1
2
A transmitter acts as a source ahead for which operating frequency depends upon current flow
This current flow causes change in magnetic field
When it is sensed by the metal, it will induce current itself and produces magnetic field opposite polarity
The current flow in the receiver coil gets amplified and processed
The resulting signal at the receiver coil is having phase shift with the transmitter coil
Large phase shift occurs for metals like gold, copper, silver etc.
Kind of metal identified is based upon phase shift
Small phase shift occurs for less conductive and thinner objects
Signal transmission An IR transmitter is equipped to shaft of
motor and 8 IR receivers are positioned surroundingly
IR transmitter emits radiations continuously which will received by receiver
The amount of IR signal hitting the receiver will be measured in terms of its output voltage of receiver
The angle of MDR motion is determine based on control points
The traverse directions are determined by considering the transmitter located at the center position of robots
Angle finding method
Fig .7 An approach to find the angle for diagonal
traverse of the robot.
Multi directional movement of MDR
This model is best suited for finding the conductive metals like gold, nickel, silver etc. at risky locations
The intensity of emitted EM rays can detect the conductive material limited to closer objects
MDR may use in seismology to find the metal content in the available minerals
In future the developed is powered with knowledge based system so that classification of metals can be accurately determined
Applications and Future scope
Conclusion
Thus by using MDR, we can detect the type of metal with multi directional movement using remote control
The developed working model needs to be powered with collision avoid mechanism in order to safe guard it from other obstacles in opposite direction
QUERIES???