Automatic Object Detection and Target using Ultrasonic Sensor

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056
Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 637
Automatic object detection and target using Ultrasonic Sensor
Lubna Afza1, Razikha parveen2 , Sunil T3, Jabeena Banu4
1,2,3 Asst Professor, Dept. of ECE, KNSIT, Bangalore, India
4PG Student, Dept. of ECE, RVCE, Bangalore, India
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Abstract - The main objective of this paper is to secure
border areas using Robotics. As one of the trends in the
development of automation in war machinery in 21st century,
has been researched and developed. The aim of this paperisto
reduce human effort on Border areas, reflex time of response,
precision to target a distant object. Until now the border
security was totally dependent on soldier. In highly secured
area the soldier detects the enemy and targets him. But if
the soldier was not able to detect the enemy, the enemy
could easily enter the secured area. So for increasing the
security level microcontroller based automatic projectile
system is introduced. The basic idea of this automatic
projectile. Current system is capable to detect any radiation
in the range of border and automatically target its position.
The proposed system is based on Ultrasonic sensor.. The
ultrasonic sensor provides 2cm to 400cm of non contact
measurement functionality with a ranging accuracy that can
reach up to 3mm. Each ultrasonic module includes a
transmitter, a receiver and a control circuit.
Key Words: Ultrasonic sensor, H BRIDGE , Stepper
motor, Laser, ARM CONTROLLER.
1. INTRODUCTION
A basic concept in automatic gun targeting system is to
detect presence of living object and target its position.
Targeting mechanism is automated as it uses ultrasonic
sensor to detect the living object, its range and Ultrasonic
sensors emit short, high-frequency sound pulses at regular
intervals. The echo signals are reflected back to the sensor,
when the object is hit, which itself computes the distance to
the target based on the time-span between emitting the
signal and receiving the echo. The Border security forces
serve as first line of defence.
It has a land frontier of 15,200 km (9,445 mi) and a coastline
of 7,516.6 km(4,671 mi ) and hence it becomes necessary to
secure this area. The proposed system does not take full
responsibility but is an effort to reduce mistakes by security
personnel at border. In the robotic system the sensor is
mounted at the front side of the system to detect an object it
provides information about the distance between the target
and the Laser that is mounted
on sensor. This information isdisplayedontheLCDscreenof
type 16X2 which means two rows of 16 characters each. It
has LED back light. If the distance is very far, then there is no
change in the speed of the dc motor. If the distance is little
far, then the speed of the motor is slow down. If the distance
is very near, then the motor is stopped. This is the operation
of the H BRIDGE driver circuit involved in this project and
now the targeting gun targets the living object. In future the
system can be enhanced using Bluetooth technology and
increase the credibility of the system.
2. System Overview
2.1 Block Diagram of proposed method
Fig1: block diagram
ARM7
MICRO
CONTROLLE
R(LPC2148)
LCD DISPLAY(16X2)
POWER
SUPPLY
ULTRASO
NIC
SENSOR
(HCSR04)
RELAY
MODULE
(BC547)
LASER
H BRIDGE
DRIVER
RELAY
(L293D)
MOTOR
DRIVER
(ULN2803)
DC MOTOR
1
DC MOTOR
2
MOTOR
UPWARD/DO
WNWARD
DIRECTION
MOTOR FOR
ROTATION

2.1.1 Circuit diagram
Fig 2: Circuit diagram
As shown in the figure the living object is detected by
presence of sensor which uses sound waves. The HC SR04
sends a ping as the submarine does and measures the time
between sending and receiving anything back when an
object (target) is in front of the sensor. Because using sound
for its measurements we can reach up to 4 meters. The
module has 4 pin connection. To power the module with
5volts, two pins are needed. One pin is trigger ping and last
one is to read result of measurements, the echo pin. The
measuring angle from HC SR04 is 15 degree and we mount
this structure onto stepper motor so the angle can be
effectively maximized for object detection.
One ping of the HC-SR04 actually exists of 8 pulses at 40 kHz
to do the measurement. To start a ping u need to provide a
10 us pulse on the trigger input. When the distance is
measured by 8 pulses the HC-SR04 puts a pulse on echo pin
and calculate length of echo pulse and speed of the sound.
The speed of sound is 340 m/s and to divide length of pulse
by this value to obtain results in mm. The ping is travelling
towards a target and back to sensoragain.Becauseofthis we
need to divide result by two.
Multiple sensor modules can detect a single object and
generate codes which in result generates signal on the
multiple ports of the microcontroller.Undersuchsituation,it
depends on the microcontroller to take the input of multiple
sensors at a time and then decide the correct location of the
object on the basis of received data
2.1.2 Rotating of stepper motor and conversion
of echo signal for target detection
The microcontroller, H Bridge circuit along with dc motors
measures to move the robot. The following is based on ARM
CONTROLLER and executes all measuring procedure, it
generates signal of trigger, start of timer, measures the
length of echo signal conversion of it to distance in specified
unit.
It certainly depends on how much of the motor rotates and
targets itself to the object location and then, as the targeting
function is complete with the help of interface between the
ULN2803 IC and the microcontroller. The targeting
system(LASER) gets activated, and light source starts
focusing over the destined location. The fire lasts(beam
lasts) until the sensor stops sensing the OBSTACLE.
2.2 Software
Keil Micro version 4 software is used to program ARM 7
microcontroller LPC 2148. The software is capable to
program the microcontroller and then generate the .hex file
which is the hardware programming assemblylanguage file.
The .hex file is applied to microcontroller to function as per
our design.
The steps involved to program the microcontroller using
Kiel Microvision 4 are
1) Install evaluation version of Kiel Microvision 4 or 5 into
the computer. Install the specific serial drivers for the
connectivity from the PC to the PCB.
2) when you Open Kiel Microvision 4, it supports the
programming in C language. Select appropriate settings
related to the specified Microcontroller and then a window
of program editing pops out.
3) Write the code in C language
4) A hardware file .hex file is required to be generated,
to embed that logic into the microcontroller,
5) Go to Run>Generate .hex file and click on it to generate
the .hex code of the specified C code.
6) Using Keil software embed .hex codeinto microcontroller
7) Once code embedded to microcontroller, switch the
controller on and it will function as per the embedded code.

2.3 FLOWCHART
Fig 3: Flow Chart
2.1.2 Rotating of stepper motor and conversion
of echo signal for target detection
The microcontroller, H Bridge circuit along with dc motors
measures to move the robot. The following is based on ARM
CONTROLLER and executes all measuring procedure, it
generates signal of trigger, start of timer, measures the
length of echo signal conversion of it to distance in specified
unit.
It certainly depends on how much of the motor rotates and
targets itself to the object location and then, as the targeting
function is complete with the help of interface between the
ULN2803 IC and the microcontroller. The targeting
system(LASER) gets activated, and light source starts
focusing over the destined location. The fire lasts(beam
lasts) until the sensor stops sensing the OBSTACLE.
3. RESULT
Fig 4: Hardware Implementation of the proposed
model
This proposed model locates an object and targets it. In the
given circuit diagram the gun firing control mechanism uses
LASER. The LASER connected to common point of relay
circuit, and other end is grounded and inputpinisconnected
to pin p1.21 of microcontroller. When p1.21 of
microcontroller is zero then the LASER will not glow, means
no object sensed by the sensor, so the gunwill notfiremeans
the LASER is off. When the port p1.21 will be high on the
object detection by the sensor,theLASERdetectedtheobject
completely and is destroyed by targeting gun.
Fig 5: Displays the status of LCD showing the name of
project
Object
Detected
Keep sensing any
presence of Object
Start
Initialize Ultrasonic
sensor trig pin and
Initialize LCD
Display Object Detected
Turn on Delay
Turn on the Laser
Mechanism and Shoot

Fig 6 : Displays the status of the implemented model in
moving position
Fig 7: Display status when the object is detected
4. CONCLUSIONS
The project “OBJECT DETECTION ROBOT” here has been
successfully designed and tested. Integrating features of all
the hardware components used have developed it. Presence
of all reasoned out and placed carefully thus contributing to
the best working.
The automatic gun targeting system is feasible for highly
secure area such as border. The system consist of
microcontroller unit, Sensor module, Laser to target. The
automatic gun targeting system is based on ultrasonic
sensor. This system helps reduce the responsibility and
efforts of soldier in border security area. The system is
economical as it usesthemicrocontrollerunit.Theautomatic
object detection and targeting system is not taking full
responsibility of security. The automatic object detection
and targeting system can be easily implemented for the
home security also. But the system shows better result in
highly secured region.
REFERENCES
[1] Ajay S. Mirchapure “Automatic Gun Targeting System”
Vol-2, Issue-5, 2016 ISSN: 2454-1362, 2016.
[2] C. E. Daniell, D. H. Kemsley, W. P. Lincoln, W. A. Tackett,
and G. A. Baraghimian, “Artificial neural networks for
automatic target recognition,” Opt. Eng., vol. 31, no. 12, pp.
2521–2531, Dec.2012.
[3] W. M. Brown and C. W. Swonger, “A prospectus for
automatic target recognition,” IEEE Trans. Aerospace
Electron. Syst., vol. 25, no. 3, pp.401–410, May 2011.
[4]http://www.engineersgarage.com/contribution/automat
ic -gun-targeting-system
[5]http://www.academia.edu/4857984/AUTOMATIC_TA
RGETING_SYSTEM4.
[6]https://learn.adafruit.com/pir-passive-
infrared...motionsensor/overview
[7] S. Blackman and R. Popoli , Design and analysis of
Modern Tracking Systems,pp.309 -313,1999:ArtechHouse
or heads unless they are unavoidable.
ACKNOWLEDGEMENT
We would like to thank KNSIT, DEPT of ECE for providing
resources for implementing this model. And also special
thanks to our HOD Mr Aijaz Ali Khan.
BIOGRAPHIES
Mrs Lubna Afza
Asst Professor, KNSIT, Bangalore
Mrs Razikha parveen
Mr Sunil T
Ms Jabeena Banu
PG Student, REVA university,
Bangalore
2nd
Author
Photo
4th
Author
Photo
3rd
Author
Photo
1’st
Author
Photo

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