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parkagendaΗλεκτρονική - Συσκευές

2 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Resistant Materials:


A general understanding of the following groupings of

materials:

o

common ferrous and non
-
ferrous metals including

alloys

o

common thermoplastics and thermosetting

plastics

o

common hardwoods, softwoods and manmade

boards

o

smart

materials created to provide specific

properties. e.g. thermoplastic sheet, smart
wire
.


A general understanding of the working properties,

commonly available market forms and
suitable

finishes for enhancement and protection.

Comparative Properties

o

Suffic
ient detail to allow products/systems to be

manufactured

Comparative Testing

Common methods of workshop testing to compare

the properties of materials e.g. tensile
strength,

hardness, toughness

Understanding of standard testing methods and data

Electronic
and electrical materials and discrete

components

Classification, basic characteristics, groupings and

applications

e.g. conductors, insulators, semi
-
conductors,

resistors, capacitors, switches, relays, diodes,

transistors,
field effect transistors (FET), d
igital

integrated circuits, analogue integrated
circuits,

microcontrollers

Construction Techniques

A practical knowledge of:

o

two
methods of modelling an electronic circuit

o

two
methods of producing a PCB

Electronic System Components:

Input Transducers

A minimum of
one
electronic input transducer which

is activated by
each
of the following:

o

S
ound
,
light
,
pressure
,
rotary movement
,
linear movement
,
strain
,
moisture
,
vibration
,
magnetism
,
temperature

Electronic Processing Systems:

Logic

The use and
combination of 2, 3 and 4 input gates

with the following functions:

o

NOT
,
AND
,
OR
,
NAND
,
NOR
,
XOR

Timers

A minimum of
two
alternative methods of producing:

o

a single output pulse of a set duration

o

a string of output pulses with a set mark/space

ratio

Counters

A minimum of
two
alternative methods of counting

input pulses to produce:

o

a decade output

o

a binary output

o

the correct coding to operate a 7 segment display

Decoders

A minimum of
one
method of decoding a 4 bit binary

Input to:

o

drive a 7 segment display

o

produce a decade output


Latches

A minimum of
two
alternative methods of setting and

latching the state of an output for a
specific input.

Amplifiers

A minimum of
two
alternative methods of amplifying

each
of the following:

o

current

o

voltage

Comparators

A minimum of
one
method of comparing:

o

different input voltages

o

digital inputs

Output Transducers

A minimum of
one
electronic output transducer for

each
of the following:

o

linear motion

o

rotary motion

o

precise angular movement

o

heat

o

light

o

sound

o

amplification

o

magnetism

Mechanical Systems:

Mechanical components

Classification and an awareness of everyday

mechanical applications

Mechanical Processes

A minimum of
two
mechanical systems to provide

each
of

the following transmissions of
motion:

o

rotary to rotary (par
allel shafts)

o

rotary to rotary (perpendicular shafts)

o

rotary to linear, linear to rotary

o

rotary to reciprocating

o

reciprocating to rotary

o

rotary to oscillatory

o

oscillatory to rotary

The systems should be capable of amplifying the

movement or force of the in
put.

Industrial and Commercial Practices:

Industrial processes

Understanding of how familiar processes used in

school are related to those used in the
industrial

context,
especially with reference to batch and mass

production. e.g. sand casting,
die castin
g, vacuum

formin
g,
PCB production

Health and Safety

Be able to identify possible risks involved with

processes, and suggest ways of minimising
these

Product/Systems Manufacturing:

Wastage

Hand and machine methods of shaping commonly

available resistant
materials by wastage

A minimum of
four:

o

hand methods

o

machine methods

o

CAM methods

Addition/Fabrication

Permanent fabrication techniques suitable for wood

A minimum of
two:

o

mechanical methods

o

chemical methods

o

Permanent fabrication techniques suitable for met
al

o

A minimum of
two:

o

thermal methods

o

mechanical methods

Permanent fabrication techniques suitable for plastic

A minimum of
two:

o

thermal methods

o

mechanical methods

o

chemical methods

Temporary fabrication techniques suitable for wood,

metal and plastic

o

A minimum of
three
mechanical methods

Redistribution /Deformation

o

a minimum of
three
redistribution/deformation

processes suitable for metals

o

a minimum of
three
redistribution/deformation

processes suitable for plastics

o

a minimum of
two
redistribution/defo
rmation

processes suitable for woods

Aids to Production

Prototyping, modelling, use of jigs, templates, CAM

and CIM


Systems and Control:


Application of Control Systems

The matching of control systems to specific

industrial applications


consideration of

mechanical,

electrical,
electronic, programmable logic units and

microcontrollers

Input/Output Devices

Matching the method of input/output to the

application

Selection of appropriate input/output transducers for

specific applications

Basic Principles

o

force
,
motion
,
movement
,
velocity
,
pressure
,
voltage
,
current
,
resistance
,
power

signals
,
positive and negative going pulses
,
positive and negative edge triggering
,
mark/Space ratio
,
amplitude
,
frequency

Open and Closed loop control

Application, merits and

features of each

Logic

Combination logic GATES to produce parallel

networks


limited to 4BIT input

Tribology

Useful and non
-
useful friction


methods of reducing

friction

e.g. clutc
hes, braking systems,
bearings,
lubricants

System Diagrams

Input


Proces
s


Output


Feedback

System Definitions

o

definition of a system

o

system boundaries

o

sub
-
systems

o

system components

System Building Blocks

o

sensors
,

input transducers
,

signal conditioners
,

timers
,

amplifiers
,
comparators
,
counters
,
latches
,
flip flops
,
logical
operators
,
output
transducers
,
programmable devices

Interfacing System Blocks

The selection of suitable interfaces to establish

connections in electrical, electronic and
mechanical

systems. e.g. motors, solenoid valves, relays,

amplifiers


Amplification

Th
e amplification of:

o

force
,
motion
,
movement
,
velocity
,
pressure
,
voltage
,
current
,
power
,
signal