Done by Professors group at Abdullah Almisnad Secondary school. Under supervision from AL-Bairaq

1. AL-Bairaq
I am Discovering Materials
Smart Sensors
Professors
Mohamed Rashed Alkuwari - Ayman Salama thoun –
Turki Ali Almuraikhi- Salman Ahmed Zaid

2. Outline
• Introduction
• Activity 1: Evading Motion Detection.
• Activity 2: Taking a tour of some sensors.
• Activity 3: Making Microphone.
• Activity 4: Exploring the Piezo Effect :Inside story
• Activity 5: Measuring Piezoelectric or Pyroelectric
Response
• Design Project: Design a coin counter
• Product Idea: Smart Blind Glasses

3. Introduction
• A smart sensor is a device that takes input from
the physical environment and uses built-in
compute resources to perform predefined
functions upon detection of specific input and
then process data before passing it on.

4. Activity 1: Evading Motion Detection
• Objective :
• 1-learn how does the smart sensor works through
the different experiments.
• 2-idenfity the input and output for the sensor .
• procedure :
• 1-We turned on the sensor.
• 2-one of our classmates walked infront of the sensor.
• 3-we measured the sensor.

5. Activity 1: Evading Motion Detection
Conclusion:
-the sensor device can feel you in the distance of 10 inches
-if you move slowly, the sensor cant feel you because the
infrared waves are steady
-if you move more quickly , the sensor device will feel you
because the rate of the infrared waves are changed

6. Activity 2: Taking a tour of some sensors
• Results(graphs , tables,…. etc.)
• Objective : expanding our knowledge about sensors
and what's their inputs and outputs.
• We wrote the flowing results in a table:
Device input processor Output
Card Pressure Electrical circuit sound
Thermometer Temperature Electrical circuit Digital numbers

7. Activity 3: Making Microphone
• Objective: Making a microphone using PVDF
• Steps:
• Prepare speaker, cup, balloon, alligator clips, Flexible PVDF,
rigid PVDF
– Connect speaker to the 2 PVDF using the alligator clips
– Try different actions (flick, scratch, blow, talk)

8. Activity 3: Making Microphone
• Results:
– We noticed that Rigid PVDF is louder with the 3 actions (Flick, scratch,
blow)
– But flexible PVDF is more clear when we used it to talk
• Conclusion:
– Choosing the PVDF type is based on the application
– If the application includes talking, we use flexible PVDF because
its more sensitive
– If the application includes flicks and hit, we use rigid PVDF
because its lauder

9. Activity 4: Exploring the Piezo Effect
:Inside story
Objective : Discover how what the PVDF is
made from
The PVDF is made out of polymer , which is
made out of a long chains of monomer C2F2H2

10. Activity 5: Measuring Piezoelectric or
Pyroelectric Response
• Objective: Study how PVDF senses pressure
and temperature and converts them into
electricity
• Steps: Prepare PVDF and alligator clips and
multi-meter
• Connect all the materials using the clips
• Apply different movements on PVDF and
notice the resulting voltage
• Expose the PVDF to hot cup of water and
notice the resulting voltage

11. Activity 5: Measuring Piezoelectric or
Pyroelectric Response
• Results:
– As the applying pressure increases, the resulting electricity
increases
– As the applying temperature increases, the resulting electricity
increases
Conclusion:
PVDF has piezoelectric and pyroelectric properties and we can
measure them and make use of them in different applications

12. Design Project: Design a Coin Counter
• To use a Piezo Sensor, Know How does Coin Counter Machines
Works.
• 1-Get a “Ruler, Sponge, Stand, Different Coins, Piezo Sensor
connected to the pc”.
• 2-Put the ruler on the sponge.
• 3-Stand the ruler on the stand.
• 4-Put the sensor down the ruler.
• 5-Slide down the coins and see how the sensor responses on your
PC.

13. Design Project: Design a Coin Counter
• The more mass you have the more
Volt/Potential you get, And That’s how the Coin
Counters Detect the coin inserted to it.
Coin3Coin2Coin1
6g3g1gMass
46v32v35vv1
51v46v32vv2
61v45v37vv3
52.6v41v34.6vVaveg
0
1
2
3
4
5
6
Category 1 Category 2 Category 3 Category 4
Series 1
Series 2
Series 3

14. Final Project:
(Title: smart blind glasses)
• Introduction and rationale :
• There are some people that the world doesn't seem to care about but we
do and we want them to feel normal as much as we can . There is blind
people in every country but we want to start in our country Qatar for a
test step.
• The idea will make a big difference , not only for the blind but the people
around them as well , our idea it not 100% new but I asure you its
promising .
• The background of our product is it’s physics and we learned physics
• In the activities that are simillar to the physics that we learned in school.

15. smart blind glasses
Aim of the work (objectives)
Objectives : 1-we want blind people to see , not literally but make life a little
bit easier for them and that’s going to be our goal.
2- our main purpose of this product is to put some hope in blind people
and make society accept them .

16. smart blind glasses
Hypothesis
• Is there a need for smart glasses for the blind ?
• Will our glasses sense accurately infrared objects in front of it ?
• Is the alarm fast enough to alert the blind person wearing the glasses ?
• Will the alarm be nosy to the person wearing it or other people around?

17. smart blind glasses
Materials
the materials are simple and cheap also not really hard to find:
-sun glasses
-infrared senor (an infrared sensor is an electronic instrument which
is used to sense certain characteristics of its surroundings by
either emitting and/or detecting infrared radiation)
-headphones

18. smart blind glasses
Method
the headphone is attached to the sensor which will allow the person who is using
it to walk without worrying about disturbing people around him because the
sensor will sense certain objects that’s gets in there way and it would turn on an
alarm to make the person know that he have to move away or in a different
direction.

19. How it works?
• 1- an inch-long camera in the sunglasses sends an
image to a hand-held control unit .
• 2- image is converted into a low-resolution black
and white picture.
• 3- the image pulsates on a grid of 400 electrodes
,according to the light level in each area of the
picture
• 4-user”feels” shape and movement on the
tongue
• 5- the brain learn to “see” the shape detected on
torque

20. smart blind glasses
Results
• The smart blind glasses will be used by blind people which will allow to
walk freely like any other normal person , or lets say that they are going to
walk like they actually can see.
• The Qatari society will improve more if every citizen or resident worked
for Qatar interest

21. smart blind glasses
Recommendations
• We Recommend to put more effort into our project and make it even
more easy to use
• We also do advice of more investigation for improvement of our product
•

22. Conclusions
(Overall of the whole module)
• We have taken many experience of many
information about smart sensors , how they
work , what we can use to make our live
easier.

23. Acknowledgment
Many thanks to AL-Bairaq team from Center for Advanced
Materials (CAM), Qatar University for supporting us during our
journey with a AL-Bairaq.
Also, I would like to thank the sponsors UNESCO, Qatar National
Commission, Ras Gas, and Shell.

24. Our slogan