IOT

POLY ENGINEERING2-2

Drill October 20, 2010

1. A device that changes a message into a form that can be transmitted

2. A device that sends a signal (i.e., encoded message)3. A device that acquires a signal (i.e., encoded message)4. A device that changes a coded message into an

understandable form

Decoder

Encoder

Receiver

Transmitter

Data

Match the statements with the correct term below:

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POLY ENGINEERING2-2

Terms

1. A device that changes a message into a form that can be transmitted

2. A device that sends a signal (i.e., encoded message)3. A device that acquires a signal (i.e., encoded message)4. A device that changes a coded message into an

understandable form

Decoder

Encoder

Receiver

Transmitter

Data

Match the statements with the correct term below:

IOT

POLY ENGINEERING2-2

Communication

Knowledge

Information

Storage

1. Unorganized facts2. Organized data3. Information applied to a task4. The sending and receiving of information

Data

Match the statements with the correct term below:

Terms

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POLY ENGINEERING2-2

Communication

Knowledge

Information

Storage

1. Unorganized facts2. Organized data3. Information applied to a task4. The sending and receiving of information

Data

Match the statements with the correct term below:

Terms

IOT

POLY ENGINEERING2-1

ASSIGNMENT 3

AN EXAMPLE FOLLOWS (for the radio)

Using what you created as a solution for ASSIGNMENT 2, now add the following:

1. Description of any non-obvious components (particularly encoder, transmitter, and decoder, as in the radio example ahead).

2. A sketch of the system components.

Radio: DETAILS

Goal: Inform Persuade Entertain Control Manage Educate

Source: Sounds and Information

Encoder: Devices that convert sound and info into a modulated sine wave (rapidly changing electric current in a wire)

ASSIGNMENT 3 – Example

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POLY ENGINEERING2-2

Radio:

Sine wave contains no information. We need to modulate (vary) it.

Problem:

ASSIGNMENT 3 – Example

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POLY ENGINEERING2-2

Radio:

Pulse Modulation: turn the voltage (sine wave) on/off (Morse Code)

Amplitude Modulation: vary the amplitude (peak-to-peak) voltage

Frequency Modulation: vary the frequency (speed)

PM

AM

FM

Encoder: Devices that convert sound and information into a modulated sine wave

ASSIGNMENT 3 – Example

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POLY ENGINEERING2-2

Pulse Modulation: turn the voltage (sine wave) on/off (Morse Code)

Amplitude Modulation: vary the amplitude (peak-to-peak) voltage

Frequency Modulation: vary the frequency (speed)

PM

AM

FM

YOU NEED TO KNOW THESE

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POLY ENGINEERING

Radio:

Goal: Inform Persuade Entertain Control Manage Educate

Source Encoder TransmitterDecoder

Receiver

Destination

ASSIGNMENT 3 – Example

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POLY ENGINEERING2-2

– Assignment should be set up similar to our example.

– Also, include a labeled diagram.

ASSIGNMENT 3 – REMINDER

History of Communication Technology

– Print Graphic Communication Visual, lingual messages that include printed media

– Photographic Communication Using photographs, slides, or motion pictures to

communicate a message– Telecommunications

Communicating over a distance– Technical Graphic Communication

Specific information about a product or its partsSize and shape, how to install, adjust, operate, maintain,

or assemble a device

Classes of Communication TechnologyDescriptions

1. Print Graphic CommunicationNewspaper, poster, brochure, billboard

2. Photographic CommunicationPhotographs, slides, motion pictures

3. TelecommunicationRadio and t.v. broadcasts, computers, mobile and satellite

4. Technical Graphic CommunicationEngineering drawings (sketches, drafting, CAD)

Classes of Communication TechnologyExamples

Telephone HeadphonesBook ComputerVideotape Remote ControlDVD PaintingMagazine CameraPhotograph Comic StripNewspaper Billboard

312,32,3121

333221,21,2

1. Print Graphic Communication 2. Photographic Communication 3. Telecommunications4. Technical Graphic Communication

Matching Classes

– Major Processes:• Relief

– A modeled work that is raised (or lowered) from a flat background.

– Cuneiform by the Sumerians ~6000 years ago.

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Communication Technology

Low Relief High Relief Cuneiform

– Major Processes:• Relief

– A modeled work that is raised (or lowered) from a flat background.

– Cuneiform by the Sumerians ~6000 years ago. – Wood block printing ~200 C.E.– Movable type printing ~1040 C.E. (Gutenberg ~1450)– Rotary printing press ~1843

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Communication Technology

– Major Processes:• Relief

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Communication Technology

By 593 A.D., the first printing press was invented in China, and the first printed newspaper was available in Beijing in 700 A.D. It was a woodblock printing. And the Diamond Sutra, the earliest known complete woodblock printed book with illustrations was printed in China in 868 A.D. And Chinese printer Bi Sheng invented movable type in 1041 A.D. in China.

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Intaglio (in-tal-yo)

1. Depressions cut into printing plate

2. The plate is covered in ink

3. Excess ink is removed from surface

4. Paper placed on plate and compressed

5. Paper is removed and ink has been transferred

– Major Processes:• Intaglio

Communication Technology

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on – Major Processes:

• Lithography (offset printing) ~1796– The source and destination are not on raised surfaces– Grease and water do not readily mix– A chemical process– Most modern books and newspapers

Communication Technology

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on • Screen Printing (~1000 C.E., China; 1907 England)

– Mainly billboards, package labels, fabric designs– Uses a woven mesh (a screen) to support an ink

blocking stencil. – The stencil forms open areas of mesh that transfer ink

as a sharp-edged image onto a substrate. – A roller or squeegee is moved across the screen

stencil forcing or pumping ink past the threads of the woven mesh in the open areas.

• Electrostatic (1938 / 1960s)– Photocopier, Laser Printer– Opposite charges attract

• Ink Jet (1980s)– Use a series of nozzles to spray ink directly on paper

Communication Technology

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• Photographic Communication – The process of using photographs to communicate a

message– Photography – capturing light on a light-sensitive

material such as film or electronic sensor– As a usable process, 1820s– Includes photographs, slides, and motion pictures

Communication Technology

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• Telecommunication– Communicating over a distance

Tele – Greek, “far off” Communicare – Latin, “to share”– Rely on the principles of electricity and magnetism – 2 types:

• Hardwired systems (telephone, cable, fiber-optic)• Broadcast systems (radio and t.v., mobile phones)

– Point-to-point: • One transmitter and one receiver

– Broadcast:• One powerful transmitter to numerous receivers

Communication Technology

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– Smoke signals and drums

– Chains of beacons (Middle Ages)• Navigation signals• Enemy troops approaching

– Homing pigeons • Carrier pigeons used as early as 1150 in Baghdad• Olympic victors, Greece; Stock options, Europe

Communication Technology

– Smoke signals and drums– Chains of beacons (Middle Ages)

• Navigation signals• Enemy troops approaching

– Homing pigeons • Carrier pigeons used as early as 1150 in Baghdad• Olympic victors, Greece; Stock options, Europe

– Optical telegraph (semaphore, 1792, France)• Towers with pivoting shutters• Information encoded by the position of the

mechanical elements

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Communication Technology

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– Telegraph (mid 1830s)• First instrument used to send messages by means of wires

and electric current• A device interrupts the flow of a current through a wire• Uses shorter and longer bursts of current to represent

letters• Device at receiving end converted electrical signal into

clicks• Operator/mechanical printer converted clicks into words• Telegram – wires over land• Cable – wires under water

– Telephone (1876 – Bell and Gray)• Greek: tele – far, phone – sound

Communication Technology

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–Broadcast• Radio (1893 – Tesla, 1901 – Marconi)• Television (1925)

– Greek: tele – far, Latin: visio – seeing – 4 main parts (cathode ray tube)– Electron gun fires 3 beams – Steering coils move electron beam across screen – Phosphorus screen has over 200,000 pixels– Glass tube holds it all together– Signals are broadcasted like radio signals

Communication Technology

– Computers– Internet– Cellular– Local Area Networks– Satellite Communication

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Communication Technology

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Communication Technology

–Engineering Drawing / Technical Illustration• Communicates specific information

– Size and shape– How parts are assembled– How to install, operate, adjust, maintain a

device• Hand methods

– Sketching– Drafting

• Computer methods– CAD (AutoCAD, Sketchup, Inventor,

ProEngineer, etc.)

– Create a PowerPoint presentation that documents the history of the development of the television, internet, and GPS. A few tips for making good presentations follow. Include pictures, references, and put everything into your own words! This assignment can be e-mailed to the course facilitator. If you cannot get access to Microsoft PowerPoint (and you can at school at least), download Open Office at www.openoffice.org. Te

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ASSIGNMENT 4