The document discusses a group's activities with smart sensors. They evaded motion detection, explored sensors in shoes and microphones, and examined the piezoelectric effect. They measured voltage from balls of different masses and designed a coin counter. Their final project proposed using sensors in wheelchairs to adjust airbag suspension for uneven ground. The sensors would detect height changes and raise the chair on airbags to safely pass obstacles. The group concluded sensors can improve lives when used correctly.

1. AL-BAIRAQ
I AM DISCOVERING
MATERIALS
SMART SENSORS
Group: Engineers
Abdullah Saad
Hamad Ali Salem
Abdulaziz Mubarak Almuhanadi
Mohamed Alaa

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:

3. Introduction
A smart sensor is a device that takes
input from the environment and uses
its processor to perform functions
upon detection of specific input and
then process data before passing it on.
What are Smart Sensors?

4. Activity 1: Evading Motion Detection
Objective:
We have to find a way to move in front of the motion sensor without
it finding us. Moving slow and steady doesn’t make the motion
sensor find us.The motion sensor detects the change in infrared heat
waves. Which means that a cold object or an object at rest cannot be
found by the motion sensor.

5. Activity 2: Taking a tour of
some sensors
We start looking at a child’s shoe that when the kid
takes a step it lights up.
■ Results:
■ Conclusion:When pressure is applied onto the
sensor it produces light.
Input Processor Output
Pressure
Electric
Circuit
Light

6. Activity 3: Making a Microphone
■ Objective: apply some effect to different types
of PVDF.
■ Results: we connected the PVDF to an amplifier
.Then we added a substance.
Effect Without Substance With Substance
Type of
PVDF
Rigid
PVDF
Flexible
PVDF
Rigid
PVDF
Flexible
PVDF
Flick More Less More Less
Scratch Less More Less More
Blow Less More Less More
Talk Less More Less More
Rigid
PVDF

7. Activity 4: Exploring the
Piezoelectric Effect :Inside story
PVDF stands for polyvinylidene fluoride
The Chemical Structure of the
PVDF.
■ Results
■ Conclusion: the PVDF contains Carbon, Hydrogen
& Florine. PVDF is a polymer that reacts to
pressure and releases voltage.
The monomer
of the PVDF

8. Activity 5: Measuring
Piezoelectric or Pyroelectric
Response
■ We measured the amount of voltage that is produced
by the different balls with different mass.
■ Results:When the weight of the ball increase the
voltage increases.

9. Design Project: Design a Coin
Counter
■ Objective: to find the weight of a coin using
the amount voltage from the previous coins.
■ Results:
Coin Large Medium Small Unknown
Mass 5.7g 5.0g 2.2g 2.4g
Voltage 0.466V 0.297V 0.120V 0.132V
0
1
2
3
4
5
6
7
8
Volta
ge
vs.
Mass
Volta
Mass

10. Final Project: wheelchairs airbag
suspension .
■ Introduction and Rationale:
■ My project talks about wheelchairs and how to use them more widely
by using sensors .
■ We care about the project so that people special needs have a broader
movement and to increase attention to people with disabilities .
■ We will use the sensors to measure the height of the ground level
shrinking ( the ground come more higher ) the chair became higher by
using the air bag suspension .

11. wheelchairs airbag suspension .
Aim of the work
Our main goal Is to help the people with disabilities
by upgrade their wheelchairs .
By take over the humps easily .
And by move safely and more
comfortable .

12. wheelchairs airbag suspension .
Hypothesis:
■ what is the purpose of the work ?
■ How it will help our government ?
■ Is it will success ?
■ The transport will became more easily
by skip the trails safely.

13. wheelchairs airbag suspension .
Materials
1- wheelchair .
2- smart sensors (PVDF).
3- airbag suspension kit .
4- some wires .
5- auto air pump .

14. wheelchairs airbag suspension .
Method
when the chair moves in the street it
faced a humps then the sensor
order the airbag suspension to
became more higher then the chair
skip the hump Easily.

15. wheelchairs airbag suspension .
Results:
■ Our development will be used on chairs to facilitate
mobility for people with disabilities .
■ It had solve some of difficulties we
had anticipated and intended to resolve .
■ The problem invented by him has largely been
solved.

16. wheelchairs airbag suspension .
Recommendations:
■ This System have to be used in specific areas, Such as in a
narrow streets and in a special gangways .
■ Our System should be checked and simulated
every 6 month ,in a special fixing center
To keep sure that it works correctly.

17. Conclusions
Finally,We have learned how to use and
diagnoses some of the Smart Sensors, And
known how to create some Daily-Use
gadgets easily. Sensors can improve our lives
if we do really use it correctly :)

18. Acknowledgment
Many thanks to AL-Bairaq team fromCenter 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.