1) The document outlines several activities exploring different sensors and the piezoelectric effect, including evading a motion detector, exploring sensors that detect sound and motion, making a microphone from PVDF film, and measuring the piezoelectric response of PVDF to pressure. 2) It then describes a design project to build a coin counter using a PVDF sensor to detect the mass of different coins based on the voltage response. 3) Finally, it proposes a future project using infrared sensors and light bulbs to automatically adjust the light intensity based on the number of people in an area, to help with crowd organization and energy savings.

1. AL-Bairaq
I am Discovering Materials
SmartSensors
PROFESSORS GROUP
TASNIM AHMAD - NOUF ALMOHANNADI
HAYA ABDALLAH – LOLWA ALMANSOORI

2. Outline
• Introduction.
• Activity 1: Evading Motion Detection .
• Activity 2: Takinga Tour of Some Sensors .
• Activity 3: Makinga Microphone .
• Activity4 : Exploring the Piezo Effects .
• Activity5 : MeasuringPiezoelectricResponse .
• Design Project : (Designing a Coin Counter).
• Product Idea : Crowding and thefuture.

3. Introduction
Sensors respond to an input stimulus (some
detectable change in their environment) and
convert it into an electrical signal that can be
channeled, amplified, and modified by other
devices to activate a response.

4. Activity1:
EvadingMotion
Detection
Objective :
Movewithin the range of this sensor andevade detection .
Observe how amotion detector operates .
Procedure :
Moveabout in front ofthe detector, observe its sensitivity.
Drawa boxtorepresent the room, then sketch the limits ofthe detector’s sensitivity.
Trytoevasion the detector until one is successful
Results :
oThat the range of theMotion Detector Sensor has a triangle shape.
oThere are many materials that isolate the motion (infrared), for example:
Conclusion : we knew how a motion detector operates .
Motion Detector Sensor
14.25 feet - 115 inches
That there is many ways even
don’t be detected by the sensor
like : to walk slowly as you can .

5. Activity2:Taking
aTourofSome
Sensors
Objective :
Explore theoperation of othersensors andsensor system .
Procedure :
Know theinput(the stimulus), theprocesser (converted), andtheoutput (the
response) of some sensors .
Draw atablewitha spaceto record thename, input,processer, and output.
Results :
Device / toy Input stimulus Processer
Output
stimulus
1. Motion
detector sensor
Motion -
movement
Electrical
connection
Sound (alarm)
2. D. talking
greeting cards
Opening the
card
Electrical
connection
Sound – light
3. Clapper light
switch
claps
Electrical relay
switch
Light in / off
4. Talking dog Sound – talking
Electrical
connection
Sound – same
talking
1 2
3 4

6. Conclusion :We exploredarange ofsmartsensor applications.
Stimulus
Sensor materials
Processor
Output device
Response
Smart sensor :
Stimulus
Sensor materials
Output device
Response
Sensor :
Activity2:Talking
aTourofSome
Sensors
1 2
3 4

7. Activity3:
Makinga
Microphone
Objective :
Focus onanapplicationrelating tovibrationsfromsound.
Procedure :
Make amicrophones.
Trytoflick,scratch,blow,andtalkwiththefilm (PVDF) .
Results :
Conclusion:Aspeaker converts voltagetosound ;a microphone
convertssoundto voltage.
PartA
Materials :
- Plastic
cup.
- Balloon .
- PVDF film
.
- Speaker .
- Tap .
- Scissors .
- Wires .
- 2 Dragons
Without
substance
Flexibl
le
Rigi
d
Flick Less
mor
e
Blow More Less
Scratch More Less
Talk more Less

8. Activity3:
Makinga
Microphone
Objective :
Comparebetween theflexible andrigid films of PVDF.
Procedure :
Makeatablethatshowsourresults ofcomparing.
Results :
Conclusion:we knew how piezofilm responds to vibrationsof sound
waves.
PartB
Materials :
- Plastic
cup.
- Balloon .
- PVDF film
.
- Speaker .
- Tap .
- Scissors .
- Wires .
- 2 Dragons
With
substance
Flexibl
le
Rigi
d
Flick More Less
Blow Less
Mor
e
Scratch Less
Mor
e
Mor

9. Activity4:
ExploringthePiezo
Effects
Piezoelectricity is derived from the Greek word piezein,
meaning to press .
Electronegativity is the ability of an atom to attract the
shared electrons in chemical bonds .
Objective :
Slowthe vibrationtoa single bending .
Learnhow piezoelectricfilm is constructedsothatitcan respondtosuch a
stimulus.
Procedure :
Comparethemodel of thePVDF monomertothe modelsfor“H²O” and
“C²H4”.
Results :
oThefluorineatomis
much moreelectronegativity than
eithercarbonorhydrogen.
Conclusion:knewhowPVDF’smolecularstructurecontributestoit’ssmart
capabilities.
PEIZO =
Pressure
O H
H
H²O
C C
H
C²H4
H
H H
C C
H
C²H²F²
H
FF

10. Activity5:
Measuring
Piezoelectric
Response
Objective :
InvestigateandmeasuretheactualpiezoelectricresponsesofPVDFfilm .
Procedure :
Connectthe device tocomputer.
Dropacoin onit .
Results :
Conclusion:The pressure generates electricity .

11. DesignProject:
(Designinga
CoinCounter)
Objective :
Comeupwith aprototypeofthe coin-sensing,sorting,andcounting
mechanism tobeused.
Procedure :
Have a3 differentcoins ,then measurethe masses.
Dropeachofthem andwritethe results.
Drawa chart
Results :
Mass Volt 1 Volt 2 Volt 3 Average
1 3.26g 0.33V 0.23V 0.15V 0.236V
2 5.08g 0.35V 0.71V 0.40V 0.486V
3 5.95g 0.592V 0.58V 0.6V 0.590V
With known mass :

12. DesignProject:
(Designinga
CoinCounter)
With unknown
mass :
The chart shows that the unknown
mass = 3.9g
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0 1 2 3 4 5 6 7
MASS VS. AVERAGEV
g
The average =
0.331 V

13. Crowding and the
future
Our final project :
A light that the intensity of
depends on the number of people
are in the place .

14. Crowding and the
future
Introduction:
“Qatar World Cup 2022 is not simply a concept for a
tournament that will be held in the distant future. It
evidence that we are working every single day to
unique tournament that will bring people in the Middle
together and build bridges between East and West .”
basis of this vision, we started thinking and working to
contribute to the achievement .
Aim of the work (objectives):
Helping Qatar to be more organized, and saving more
energy .

15. Crowding and the
future
Hypothesis:
Our hypothesis that the project will work as
an organizer, instructor, and saver at the
same time .

16. Crowding and the
future
Methods and
Materials:
We need :
-Infrared detector
sensor.
-Infrared sensor.
-Light bulb.
-Electrical circuit.

17. Crowding and the
future
Results:
It will help Qatar to be more
organized.
Instruction is every where
It will save money and energy .

18. Crowding and the
future
Recommendations:
oYou can add some sounds or words to instruct the
people for the good way .
oYou use advanced sensor than we used .

19. Conclusion :
Scientists and engineers devote their
entire lives to studying and developing
new and better materials for a variety
of purposes .
We learned many things like how to
construct and operate smart sensors
with PVDF .

20. Acknowledgment
Many thanks to my teachers, school and 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, Maersk
and Shell.