The project is designed to develop a robotic vehicle that can sense metals ahead of it on its
path similar to sensing land mines. The robot is controlled by a remote using RF technology.
It consists of a metal detector circuit interfaced to the control unit that alarms the user behind
it about a suspected land mine ahead. An 8051 series of microcontroller is used for the
desired operation. At the transmitting end using push buttons, commands are sent to the
receiver to control the movement of the robot either to move forward, backward and left or
right etc. At the receiving end two motors are interfaced to the microcontroller where they are
used for the movement of the vehicle. The RF transmitter acts as a RF remote control that has
the advantage of adequate range (up to 200 meters) with proper antenna, while the receiver
decodes before feeding it to another microcontroller to drive DC motors via motor driver IC
for necessary work. A metal detector circuit is mounted on the robot body and its operation is
carried out automatically on sensing a any metal underneath. As soon as the robot senses this
metal it generates an alarm sound. This is to alert the operator of a possible metal (eg: land
mine) ahead on its path. Further the project can be enhanced by mounting a wireless camera
on the robot so that the operator can control the movement of the robot remotely by watching
it on a screen.
The project “METAL DETECTION ROBOT” mainly consists of Arduino software ,Embedded c programming, metal detector sensor,l293d board,Bluetooth module,GSM module and GPS module.
- First install “ARDUINO BT JOYSTICK FREE” app in our android phone.
- Check whether the app is working or not.
- Then write the code for motors,sensor,Bluetooth module,GSM module,GPS module and dump it.
- Arduino software is used for simulation.
- Pair the installed Bluetooth app with the bluretooth module in the kit.
- We operate the robot with the help of the installed app and it acts as a joystick.
- At the time of movement of robot,if it finds any metal on its path it gives indication by the buzzer.
- It automatically sends the location as a message to the mobile number which is specified in the code.
- Metal sensors are used to detect the metals.
RESULT AND CONCLUSION
The project “METAL DETECTOR ROBOT” has been designed and tested integrating features of all the hardware components and have developed it.Presence of every module has been reasoned out and placed carefully thus contributing to the best working of the unit.Secondly using advanced microcontroller, arduino software and embedded c programming,the project has been successfully implemented.
1. Pulse induction
The developers were looking at using a different technique in metal detection called pulse induction. Unlike the beat frequency oscillator or the induction balance machines which both used a uniform alternating current at a low frequency, the pulse induction machine simply magnetized the ground with a relatively powerful, momentary current through a search coil. In the absence of metal, the field decayed at a uniform rate, and the time it took to fall to zero volts could be accurately measured. However, if metal was present when the machine fired, a small eddy current would be induced in the metal, and the time for sensed current decay would be increased. These time differences were minute, but the improvement in electronics made it possible to measure them accurately and identify the presence of metal at a reasonable distance. These new machines had one major advantage: they were mostly impervious to the effects of mineralization, and rings and other jewelry could now be located even under highly mineralized black sand. The addition of computer control and digital signal processing have further improved pulse induction sensors.
Metal detectors are widely used in archaeology with the first recorded use by military historian Don Rickey in 1958 who used one to detect the firing lines at Little Big Horn. However archaeologists oppose the use of metal detectors by "artifact seekers" or "site looters" whose activities disrupt archaeological sites.The problem with use of metal detectors in archaeological sites or hobbyist who find objects of archeological interest is that the context that the object was found in is lost and no detailed survey of its surroundings is made. Outside of known sites the significance of objects may not be apparent to a metal detector hobbyist.
Metal detection robot which allow the exact location of all metals.FUTURE ASPECTS:
- It can be used to detect the” Explosive Weapons”.
- The system can be implemented in military applications to detect the Landmines.
- The system further developed with added feature like implementing arm to the metal detecting robot,so that ,first it finds the landmines and then it removes that.