Into which column does each of the technologies below go?
Alarm Clock – communicates the time (with a sound) to a
human.
Thermostat – measures the temperature and turns the
furnace on or off.
Telephone – a human speaks in one side, a human hears it
on the other.
T.V. Remote – a human pushes a button, a signal is send to the
television.
ASSIGNMENT 1 - examples
Text Msg.
T.V.
AutoCAD
Video Game
Controller
GPS
Car Alarm
Motion
Sensor Light
Traffic Light
Remote Car
Locking
IOT
NOTE: Many technologies fit into multiple columns depending on
how you look at it.
POLY ENGINEERING
Communication Technology
GOALS
Control
FEEDBACK
INPUTS
PROCESSES
OUTPUTS
GOALS
IOT
2-1
POLY ENGINEERING
Communication Technology
– Goals
Inform Persuade Entertain Control Manage Educate
– Inputs
Source of Communication
– Processes (in this order)
Encoder Transmitter Receiver Decoder Storage Retrieval
– Outputs
Message to the destination
Not always
– Feedback and Control
Reversing the communication line
IOT
2-1
POLY ENGINEERING
Communication Technology
Inform
Persuade
Entertain
Control Manage Educate
SOURCE
TECHNOLOGY
DESTINATION
Input
Process
Output
Transmitted
Communication
Encoder
Transmitter
Receiver
Decoder
Storage
Retrieval
Received
Communication
IOT
2-1
POLY ENGINEERING
Radio:
Goal: Inform
Persuade
Entertain
Control
Manage
Educate
Source: Sounds and Information
Encoder: Devices convert sound and info into modulated sine waves
Transmitter: Antennas radiate the radio waves into air (medium)
Receiver: Antennas capture the radio waves from air
Decoder: Devices convert radio waves back into sounds and data
[Storage: Recording devices store sounds and data for playback]
[Retrieval: Stored data can be accessed and played]
IOT
Destination: Consumers’ ears and eyes
2-2
POLY ENGINEERING
ASSIGNMENT 3 – Example
Radio:
Encoder: Devices that convert sound and information into a
modulated sine wave
Pulse Modulation: turn the voltage (sine wave) on/off (Morse Code)
PM
Amplitude Modulation: vary the amplitude (peak-to-peak) voltage
AM
Frequency Modulation: vary the frequency (speed)
FM
IOT
2-2
POLY ENGINEERING
Classes of Communication Technology
DEFINITIONS:
– 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 parts
Size and shape, how to install, adjust, operate, maintain,
or assemble a device
IOT
2-4
POLY ENGINEERING
Matching Classes
1.
2.
3.
4.
Print Graphic Communication
Photographic Communication
Telecommunications
Technical Graphic Communication
3
1
2,3
2,3
1
2
1
Telephone
Book
Videotape
DVD
Magazine
Photograph
Newspaper
3
3
3
2
2
1,2
1,2
Headphones
Computer
Remote Control
Painting
Camera
Comic Strip
2-4
Billboard
IOT
POLY ENGINEERING
Print Graphic Communication
Communication Technology
– Major Processes:
• Relief
2. The plate is covered in ink
Intaglio
– A modeled work that is raised (or lowered) from a flat
background.
By
593 A.D., the first printing press was invented in
(in-tal-yo)
– Cuneiform by the Sumerians ~6000 years ago.
China, and the first printed
newspaper
was available
3. Excess
ink is removed
from surface
– Wood block printing ~200 C.E.
in Beijing in 700 A.D. It was a woodblock printing. And
– Movable type printing ~1040 C.E. (Gutenberg ~1450)
the Diamond Sutra, the earliest known complete
– Intaglio (in-tal-yo) ~1430
woodblock
printed book with illustrations
was printed
4. Paper placed
on plate and
–
Rotary
printing
press
~1843
in China in 868 A.D. And Chinese printer
Bi Sheng
compressed
• Lithography
printing)
~1796
invented
movable(offset
type in
1041 A.D.
in China.
– The source and destination are not on raised surfaces
5. Paper
is removed
and ink has been transferred
– Grease
and water
do not
readily mix
1. Depressions
cut into
Low
Relief
Cuneiform
IOT
printing
– plate
A chemical process High Relief
POLY ENGINEERING
– Most modern books and newspapers
2-4
Communication Technology
Print Graphic Communication
• 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)
IOT
2-4
POLY ENGINEERING
– Use a series of nozzles to spray ink directly on paper
Communication Technology
• Telecommunication
Telecommunications
– 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 IOT
2-4
POLY ENGINEERING
Communication Technology
Telecommunications
– 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
IOT
2-4
POLY ENGINEERING
Communication Technology
Telecommunications
– 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
IOT
2-4
POLY ENGINEERING
TYPE 2: MULTI-VIEW
MULTI-VIEW
• Reference Planes:
– Frontal Reference Plane
» Front View
– Horizontal Reference Plane
» Top View
– Profile Reference Plane
» Side View
Which View?
TOP
Which Reference Plane?
PRP
IOT
FRP
Which Reference Plane?
2-10
POLY ENGINEERING
TYPE 2: MULTI-VIEW
AUXILIARY VIEWS
• So far, our standard 6 views are all visible using
the three regular planes of projection
– Frontal Reference Plane
– Horizontal Reference Plane
– Profile Reference Plane
• Those views are drawn TRUE SIZE
• However, inclines (slants) are not shown as true
size in standard views.
IOT
2-10
POLY ENGINEERING
SECTIONAL VIEWS
• Sectional Views
TYPE 2: MULTI-VIEW
– Different materials have different sectional views
IOT
2-10
POLY ENGINEERING
Communication Technology
October 13, 2008
DRILL
• Turn in your 3-view assignment (include NAME)
• Match the type of Technical Graphics below with
its type:
B
C
A
E Isometric
B Section
C Standard View
D
E
F
F Development
G Perspective
D Oblique
A Cut-away Pictorial
G
IOT
2-11
POLY ENGINEERING
Technical Graphic Communication
[REVIEW] MULTI-VIEW DRAWINGS
Standard Views
Sectional Views
Auxiliary Views
Developments
IOT
Working Drawings
2-11
POLY ENGINEERING
Technical Graphic Communication
[REVIEW]
PICTORIAL DRAWINGS
Show a likeness of an object as viewed by the eye
Isometric
Perspective
as it is perceived by the eye.
Oblique
One face is true form
Exploded Assembly
IOT
Cutaway Pictorial
2-11
POLY ENGINEERING