Lie Detector Using SIMULINK (MATLAB) ,Arduino and Biomedical sensors

1. Lie Detector
UNDER THE GUIDANCE OF
Prof. Prasad d. kadam
USING MATLAB , ARDUINO
&
BIOMEDICAL SENSORS
BY :-
VIKRAM SINGH RATHAUR (91)
ANKIT RAJ (108)
ANKIT RAJ(94)
BHARATI VIDYAPEETH (DEEMED TO BE UNIVERSITY)
COLLEGE OF ENGINEERING , PUNE
DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION

2. INTRODUCTION
• Lie detector tests help in the process of distinguishing and
detecting truth from deceptive individuals.
• There are typically three types of questions used in
polygraph testing or voice stress analysis testing.
• Irrelevant questions establish a baseline to compare other
answers by asking simple questions with clear true and
false answers.
• Comparison questions have an indirect relationship to the
event or circumstance, and they are designed to encourage
the subject to lie.
• Relevant questions are compared against comparison
questions and irrelevant questions.

3. OBJECTIVE
• lie detection tests record a number of different bodily responses which can then be used to
determine whether someone is telling the truth. They usually measure things
like blood pressure, change in a person's breathing, and sweating on the palms and sudden
changes in body temperature.
• Conventional method requires the presence of an individual during the test for examining the
results which most of the times lead to discrepancy during the results. Implementation of
digital database in lie detection helps to control the discrepancy involved.
• This project obtain the related autonomic signals from a subject and analyses them to detect
nervousness of the subject. Further, the detected signal is given to a GUI of the signals to
simplify analysis and finally set up a conducive environment for inducing lie related stress.

4. RATIONALE
• Lie detectors can be helpful to the judiciary of our country in making faster decisions .No ,
guilty person would be able to get away from his/her doings.
• Narcotics test are vey harmful to the charged persons neural system and sometimes even
fatal . So this can be an alternative to the narcotic analysis.
• The polygraph lie detector is not an accurate version of lie detector making it a difficult choice
for investigations our modifications will make it more accurate and trustworthy.

5. BlOCK DIAGRAM
Amplifier Circuit
for Arduino
sensor for
pulse/body temp
Arduino Uno
MATLAB
SIMULINK
SERIAL
LCD
Data
Processing
MATLAB
Signal
Transformation

6. COMPONENTS
• Heart Rate Monitor Sensor
• Temperature Sensor
• Arduino Uno
• Simulink/MATLAB

7. SCOPE
• Law enforcement agencies and intelligence agencies in the countries are
by far the biggest users of polygraph technology.
• The reason for the use of lie detector test is its legality of using inhuman
degrading methods to confess the crime.
• Advantage over narco-analysis which involve the usage of drugs on the
accused. it can cause a permanent damage to brain if dosage not
calculated properly.
• The most important aspect is to ban the use of torture to seek
information on the accused.

8. PLAN OF WORK(before initiation)
Phase 1: Information gathering on latest technologies that can be used Preparing the
hardware design.
Phase 2: Implementation of design to construct a modular system. Coding a dedicated
program and function for our system.
Phase 3: Implementing the design on a dedicated PCB to reduce the size as well the
errors.Minimize the complexity of the design.
Phase 4: Testing the system in real life situations and making necessary
improvements..

9. LITERATURE
SURVEY
➔ Arduino Lie Detector
https://www.instructables.com/id/Arduino-Lie-Detector/
➔ Polygraph
https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s
2007/jsc59_ecl37/jsc59_ecl37/
➔ Arduino Polygraph Machine (Lie Detector)
https://create.arduino.cc/projecthub/electropeak/arduino-
polygraph-machine-lie-detector-7d8b10

10. Progress till now
1) All hardware related to the project are gathered .
2) All the hardware are temporarily integrated with the help of jumper wires and a printed circuit
board .
3) A single sided printed circuit board was designed on ALTIUM SOFTWARE and was given for printing
The printed circuit board is used for interfacing the LCD and the Sensors Using the Arduino uno
development board.
4) Worked on presentation by enclosing the whole project in a glass hand made box.
5) Body temperature sensor was integrated in wrist band for proper body contact.
6) Project completed.

11. RESULT:-

14. Thank you