1) The document outlines activities exploring smart sensors and piezoelectric materials. Activities include evading motion detection, taking tours of different sensors, building a microphone using PVDF film, and exploring the piezo effect. 2) A design project had students create a coin counter using the piezoelectric response of PVDF to different coin masses. 3) A final project was developing a gas detecting oven that uses a gas detector and alarm to automatically shut off gas and electricity if a leak is detected, and notify authorities. The goal was to reduce fires, explosions and poisonings from undetected gas leaks.

1. AL-Bairaq
I am Discovering Materials
smart sensors
Platinum
Alghalya Alemadi Dhabya Alkhulaifi
Maha Alobaidly

2. Outline
• Introduction
• Activity 1: Evading motion detection
• Activity 2: Taking tour around sensors
• Activity 3: Make a microphone.
• Activity 4: Exploring the piezo effect :The inside story
• part A : building the PVDF monomer
• part B : building the PVDF polymer
• Part C : seeing the structure work
• Activity 5 : measuring piezoelectric and pyroelectric response
• Part A : measuring the piezoelectric response
• Part B : measuring the pyroelectric response
• Design Project (Designing a coin counter)

3. Introduction
• Smart sensor : A sensor that includes a
microprocessor that conditions the signals
before transmission to the control network.

4. Activity 1: Evading motion detection
Part ( A ) Part ( B )
detectionspeed
YesHigh speed
YesLow speed
NoStationary
detectionobject
YesIce
YesBoiling water
nocardboard
Conclusion : The motion detector can sense any movement within a cone shape distance . It can
sense high speed movements
It can detect anything with heat or thermal energy around it because of the moving molecules
.The motion detector can sense thermal heat using a PDV film.

5. Activity 2: Take a tour of some sensors
• Conclusion: each device or object has a unique
stimuli and response depending on it purpose .

6. Activity 3 : making a microphone
Conclusion: when the PVDF is attached to the substrate the sound
becomes clear.
Both films respond better to scratching and flicking than talking and
blowing .
The flexible film respond better than the rigid film in the
range of frequencies reproduced
Tests Flexible Film Rigid Film
Flick
Free Film Very High High
Attach to substrate
Very High and
clear
High and
clearer
Scratch
Free Film High Low
Attach to substrate
Higher than
free film
High
Blow
Free Film Low Low
Attach to substrate High High
Talk
Free Film Low Low
Attach to substrate
Higher and
much clearer
Higher than
free film

7. Activity 4:
Exploring the piezo effect :
The inside story
Part A : we used the molecular model kit to build the monomer C2F2H2
Part B : building the PVDF polymer
Part C : when bending the film we noticed that bending in one direction
produces a positive voltage and bending in the opposite direction produce
negative voltage . The faster the bending the larger the potential .

8. Activity 5 : piezoelectricity and pyro
electricity
Voltage producedType of ball
-0.149Big ball
-0.056Medium ball
-0.043Small ball
voltageBig ball thrown from different
heights
-0.2715cm
-0.27110cm
VoltageBig ball thrown on substrate
and without
0.042Substrate
-0.042Without
Part A : as the mass of the ball
increases the voltage increases
because the pressure applied to
the PVDF is higher . The grater
the drop height , the greater the
pressure which results in high
voltage . Using a substrate will
give a higher voltage than the
free film because the substrate
will cause more vibration to the
film .
Part B : we noticed how heat can
cause the PVDF film to produce
high voltage .

9. Design project : making a coin counter
averageV3V2V1
-0.019-0.022-0.017-0.017C1=2.50
1 Cent
-0.129-0.095-0.110-0.159C2=4.58
5 Cents
-0.061-0.056-0.071-0.056C3=3.3
10
Qorosh
We used the
piezoelectricity of the
pvdf to design a cin
counter , by dropping
different coins with
different masses and
realized that every mass
gives a different voltage

10. Final Project:
(Title: gas detecting oven )
.Recently , people are facing fires , carbon monoxide poisoning and explosions
because of an undetected gas leakage .
We created an oven that contain a gas detector and alarm . If gas leakage was
detected the alarm will produce an alert and then the processing unit will
automatically shut down the electricity in the area as well as the gas cylinder
controller . And the civil defense will get a message that the location is suffering
from a gas leakage by the use of the processing unit and GPS .
We aim that these two innovation will have an influence on peoples life and that
will reduce fires , carbon monoxide poisoning and explosions that are caused by
gas leakage.

11. Gas detecting oven
Hypothesis
We hypothesis that the gas detecting oven will avoid
fires that are caused by a gas leakage in the
community and reduce the carbon monoxide poising
and explosions.

12. gas detecting oven
Methods and Materials
we are going to use oven and attach a gas
detector and alarm to it , to detect the gas
leakage . And an alarm that would produce an
alert if gas was detected around the area .

13. gas detecting oven
Results: (‫)النتائج‬
• Our product could be used in homes ,
restaurants , etc.
• This product will reduce the carbon monoxide
poising and explosions as well as fires .
• Parents will feel safer leaving their kids alone
at home

14. gas detecting oven
Recommendations: (‫)التوصيات‬
• we recommend the ministry of interior ( civil
defense ) to use the innovations that we
created in declaration of the restaurants,
school cafeterias and Home Eco. classrooms .
• Markets should provide these innovations for
people to use them in there homes

15. Conclusions
(Overall of the whole module)
Albairaq workshop really increased our knowledge of
smart sensors . And this knowledge helped us to
innovate products that will reduce the fires , carbon
monoxide poisoning and explosions that are caused
by gas leakage . Because recently , people are facing
many of these situations because of an undetected
gas leakage .

16. 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 ,and Shell for supporting such a great
opportunity for student like us to experience .