semi-auto sensor curtain engineering team project january 2012 semester semi-auto sensor curtain

SEMI-AUTO SENSOR CURTAINEngineering Team Project

January 2012 Semester

SEMI-AUTO SENSOR CURTAIN

Group 73:

• Supervisor: Dr. Hassan Soleimani• Members:

Mohd Amri Azri bin Zulkifli 13152Tan Lean Huat 12870Merdan Choshanov 12987Muhammad Farhan bin Alias 13213Syazwan Ifwat bin Zulqarnain 13402Mohd Zulfadzlie bin Zainal Abidin 15197Collins Tan Pau Leeh 15420


INTRODUCTION

• PROJECT DEFINITION: Auto-Semi Sensor Curtain” helps users to automatically open or shut the curtain based on the light intensity. If the light intensity of a room exceeds the desired level, the “Auto-Semi Sensor Curtain” will adjust the opening of the curtain according to the desired level using the help of light sensor and mechanical motors. The light sensor will detect the light intensity in the room, and based on that it will transmit data to the motors to open or close the curtains.


INTRODUCTION

• BACKGROUND STUDY The main injuries caused by the Sun exposure


Figure1 : The main injuries caused by the Sun exposure

INTRODUCTION

• Cont. Sun Exposure Chart For Different Skin Types and UV Index


Table1 : Sun Exposure Chart For Different Skin Types and UV Index

INTRODUCTION

•Cont. Fading Factor


Figure 2 : Fading factor

INTRODUCTION

• PROBLEM STATEMENT:– Exposure from the ultraviolet from the Sun may

harm human health.– Inconvenient for the disable and the elder at

home.– Discolor of fabric and furniture from excessive

sunlight.


INTRODUCTION


• OBJECTIVES:– To design, modify, develop, and make innovations

to the existing manual curtain in house.– To create a user friendly design to open and close

the curtain.– To remain conventional curtain design, while

improvising it.– To screen off Ultra Violet ray from coming into

house.

METHODOLOGY


METHODOLOGY

• TASK DISTRIBUTION: Group Leader (Mohd Amri Azri bin Zulkifli 13152)

Conduct all meeting. Planning on weekly agenda plans for weekly meetings. Monitoring group works to ensure that they are completed in accordance with budget,

design and schedule. Task listings and distributions.

Secretary (Collins Tan Pau Leeh 15420) Keeps record of all group activities. Helps in the obtaining strength of the materials used. Prepares the slide for presentation. Compile project proposal, progress report and final report.


METHODOLOGY

• TASK DISTRIBUTION: Treasurer (Syazwan Ifwat bin Zulqarnain 13402)

Keep track on group account and in charge for claim. Advise and report on the financial aspects of the project. Ensure that the expenditure are within the budget. Purchase materials needed.

Marketing Department Member (Merdan Choshanov 12987) In charge on potential of product to market Search suitable and relevant resources Generate interesting ideas to be presented during oral presentation


METHODOLOGY

• TASK DISTRIBUTION: Technical Department Members (Tan Lean Huat 12870/ Mohd Zulfadzlie bin Zainal Abidin

15197) Design the prototype of the project. Designing technical part of the project. Execute additional research on components of materials. Involved in lab preparation.

Design Member (Muhammad Farhan bin Alias 13213) Design the prototype of the project. In charge and leading the group members in mechanical part of the project. Identification of suitable tools, hardware and software. Perform mechanical calculations and simulation using software.

NOTE: All of the members were involved in chemical, mechanical and electrical part of the project.


METHODOLOGY

• DATA GATHERING:– In contrast to the normal curtain that been used since the early

century, the project provides some good features. Below are the features comparison between a normal curtain and the project:

Features Normal Curtain Project Curtain

Mobility Low High

User Friendly Low High

Weight Moderate Moderate

Safety Low High


Table 2 : Features Comparison

METHODOLOGY

• DATA GATHERING:– There are several options of part that we considered in order to

construct the prototype. The included options are type of the curtain. There are two possible types of curtain program;:

Type Safety Level Shape Price

Remote Normal Semi-spherical High

Sensor High Rectangular Low


Table 3 : Options of curtain program

METHODOLOGY

• DESIGNING AND FABRICATING TOOLS:– Software:

No Software Part Details

1. Multisim Designing the circuit To design the electrical parts

2. Catia Designing the model To sketch the design of the prototype

3. Microsoft Office Documentation For calculation, tables, charts and etc.


Table 4 : Software used

METHODOLOGY

• DESIGNING AND FABRICATING TOOLS:– Tools/Hardware:

No Hardware Part Details

1Light Dependent

Resistor (LDR)Electrical component To detect the present of light

2 Vero board Electrical component Solder the electrical components on it

3Light Emitting Diode

(LED)Electrical component Give signal to the circuit by emit the light

4 Resistor Electrical component

Oppose an electric current by producing a

voltage drop between its terminals in

proportion to the current.

5 Transistor Electrical componentPerform the function of a switch or an

amplifier.

SEMI-AUTO SENSOR CURTAINTable 5 : Hardware used

METHODOLOGY

• DESIGNING AND FABRICATING TOOLS:– Tools/Hardware(Cont.):


6 Switch Electrical componentControl the flowing of the electric current in the

circuit

7 Chips Electrical component Control the activities through out the circuit

8 Capacitors Electrical component Acts as another voltage device in circuit

9 Motor Mechanical component Converts electrical energy into mechanical energy.

10 Gears Mechanical component Rotating part in the prototype, that transmits torque.

11 Pulley Mechanical componentSupport movement of the flatbelt along its

circumference.

SEMI-AUTO SENSOR CURTAINTable 6 : Hardware used (Cont.)

METHODOLOGY

• DESIGNING AND FABRICATING TOOLS:– Tools/Hardware(Cont.):


12 Shaft Mechanical componentA rotating part of the prototype, that

transfers torque from motor gears.

13 Flat belt Mechanical component Transmits power in the prototype.


Table 7 : Hardware used (Cont.)

METHODOLOGY

No Tools Description

1 Mallet and anvil Shaping the aluminium sheet, 90°

2 Rolling machine Shaping the aluminium sheet, for round shape

3 File Smoothing the surface after the cutting process

-Tools/Hardware(Cont.): Shaping Tools


Table 8 :Shaping Tools

METHODOLOGY


1 Drill machine Make hole at the materials, eg: wood and steel

2 Vice and G-clamp Hold or clamp the material during cutting process

3 Hacksaw Cutting the steel

4 Jigsaw Cutting the wood Reduce the time consumed compare to handsaw

-Tools/Hardware(Cont.): Cutting tools


Table 9 : Cutting tools

METHODOLOGY

- Tools/Hardware(Cont.): Assembly Tools


1 Hammer and nails Joining the prototype, eg: wood

2 Screwdriver Tightening the screw

3 Bolts and nuts Joining two different materials, eg: steel and wood

4 Welding machine Joining two same materials, eg: steel


Table 10 : Assembly Tools

RESULT AND DISCUSSION

• DESIGN CONCEPT:– Mechanical Design Front view (cm)


Figure 3 : Mechanical design front view


• DESIGN CONCEPT:– Mechanical Design Top view (cm)


Figure 4 : Mechanical design top view


• DESIGN CONCEPT:– Mechanical Design Back view (cm)

SEMI-AUTO SENSOR CURTAINFigure 5 : Mechanical design back view


• DESIGN CONCEPT:– Mechanical Design Bottom view (cm)


Figure 6 : Mechanical design bottom view


• DESIGN CONCEPT:– Mechanical Design Orthographic projection




Figure 7 : Mechanical design othographic projection


• DESIGN CONCEPT:– Mechanical Design Isometric view

SEMI-AUTO SENSOR CURTAINFigure 8 : Mechanical design isometric view


• DESIGN CONCEPT:– Circuit Design

SEMI-AUTO SENSOR CURTAINFigure 9 : Circuit Design


• JUSTIFICATION FINAL DESIGN:Shape Description

Main curtain board

We are using the rectangular shape because it is common shape used for curtain board. It is also easy to handle

and suitable to fill in with curtain, mechanical mechanism and electrical

board.


Table 11 : Final Design Justification


• JUSTIFICATION ON MATERIALS:Material Selection Description

Steel We use Steel as the main board for the curtain.

ElectricalWe decided to buy DC motor because it is the most suitable

motor for this project and easily to handle.

OthersFor the other things, we use a small aluminium board as the

holder.

GearsWe choose helical gears because it can also be used on non-

parallel shafts to transmit motion and suitable for our project

PulleyBrass is not as strong as steel, but it is strong enough for areas

where only a little bit of strength is needed

Flat beltWe bought flat belt because it is easily to handle and the

movement of curtain will be smoother.


Table 12 : Justification on Materials


• FINAL PROTOTYPE:



• CONCEPT OF MECHANISM(HOW IT WORKS): Light Dependent Resistor(LDR) senses the light level of the

room, and when it reaches the proper level, sends the signal to the electric motor. Electric motor converts the electric energy from batteries to the mechanical energy and transfers it to gears by the shaft. Rotating energy rotates the flat belt along its circumference, which is attached to the pulleys. Curtain is suspended by the flat belt. This mechanism makes our prototype, to automatically close the curtain when there is too much light(sunlight). Along with all this our curtain can be regulated manually. Thus our project is called semi-auto sensor curtain.



• Light Intensity For LDR To Detect. For a low cost LDR, at the same light intensity, the part

to part variation in resistance can be as high as 50%. Therefore such a low cost LDR is seldom used for measuring light intensity but more for light presence/absence detection. (retrieved from http://www.emant.com/316002.page, 2012 April 2)



• ECONOMICAL/BUSINESS CONSIDERATION:

NUMBER ITEM AMOUNTPRICE(RM) PER UNIT

TOTAL(RM)

1. Motor 1 120 120

2. Battery 2 30 60

3. Transformer 1 45 45

4. Charger 1 32 32

5. Components 1 18.50 18.50

6. Steel - 20 20

TOTAL 295.5


Table 13 : Economical/Business Considereation

CONCLUSION

• The objectives are achieved.• Demand of most of the users in local market is

suited by the affordable price of the product.• Semi-automatic, though user friendly curtain

is projected to meet your expectations and ease your life.

• The last but not the least, now you are safe from ultraviolet lights automatically.


RECOMMENDATIONS

• Can be integrated into remote controlled curtain as well.

• Time adjustment mechanism can be added to close and open and certain times.

• Imrove the rolling mechanism.


REFERENCES

• Yaw, L., 2004, Curtain, 5 June 2011, from http://www.docstoc.com/docs/56209248/Curtain---Patent-7150305

• Light dependent resistor Engineering, 3 June 2011, from http://www.ldrengineering.org/light-dependent-resistor/

• 3P:Ivestigating sensors, 3 June 2011, from http://www.doctronics.co.uk/ldr_sensors.htm

• Seeeduino Curtain Control, 3 June 2011, from http://www.instructables.com/id/Seeed-studio-Curtain-Control/step4/Wiring/

• Curtain Systems, 4 June 2011, from http://wikihelp.autodesk.com/Revit/enu/2012/Help/Revit_User%27s_Guide/0325-Build_th325/0327-Architec327/0546-Curtain_546/0583-Curtain_583


semi-auto sensor curtain engineering team project january 2012 semester semi-auto sensor curtain

Documents

autosemi sensor curtain

help of light sensor

conventional curtain

light intensity

existing manual curtain

exposure chart

monitoring group

group account