Unit R010 - Introductory presentation - OCR

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OCR Cambridge Nationals in

ICT

(Level 1/2)

R010

Developing Control Systems

Computer control is used in many different areas.

Control systems

Automatic garden sprinklers…

Windows that automatically open when the sun shines…

…and robot workers in car factories, are all examples
of control systems at work.

Weather systems are used to
predict
storms, tornados and earthquakes.

Weather systems

They also help people to know when
the best time is to
irrigate land
,
spray pesticide
or
gather crops
.

They
monitor

air temperature,
humidity, wind speed and
direction, solar radiation, rainfall
and soil temperature.

Heating systems are controlled by
thermostats

that turn
the heating up or down depending on the temperature.

Heating systems

They can be set to come on
and go off at specific times and
are often used to
maintain a
constant rate
of heat.

These are found in homes,
factories and greenhouses.

Many businesses and homes
have burglar alarms that go off if
a
magnet

switch

is broken, a
window is opened or an
infrared
beam
is broken.

Alarm systems

Control systems like this can
be programmed to
react to
sensors
and know what to do
when the sensor is triggered.

Traffic lights are a prime example of a
set of
repeating control sequences

that work on a loop.

Sequences

Sensors

detect motion or, in the
case of a crossing, a button is
pressed that starts the sequence of
events to ensure the traffic lights
work as they should.

Control programs are often
viewed as flowcharts so it is
easy to see the
starts
,
stops
and
sequences
.

Flowcharts

It is easy to ask
questions

and see the
answers

in a
flowchart diagram.

You may have used a
flowchart creator program

and seen this at work.

Writing control programs involves:


logging

any changes


testing

the finished article


and
ensuring
the system works
as it should.

Testing

The last thing you want is a
greenhouse full of plants dying
or traffic accidents caused by
poorly controlled lights.

You will learn…


How to write control programs.

How to test a control program.

How to create flowcharts.

How to plan and create a
control program.

What control systems are used
for.

How control programs work.

Thank you for using

this OCR resource


Other OCR resources are available
at
www.ocr.org.uk


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