1. Data Logging 1
WJEC ICT

2. Starter
Logon
In a word processor, list all the different things in the world around us (society) which is automatically controlled by computers.

3. Objectives To understand what is meant by the term data logging.
Know why we use data logging in society.
Know the role of sensors in control technology.

4. input output What is Data Logging?
“The automatic collection of data using sensors”
Automatically recording data using different types of sensors.
input
output
PROCESSING
Sensors record data and put it into a computer system
Data is processed in some way. E.g. a graph or mathematical calculations are performed.
Data is displayed in some way (screen, print)

5. Examples
Experiments, Speed and braking sensors, weather stations, TV (auto-adjustment of brightness in dark/light rooms), heart monitors.
Other examples include light sensors.

6. Where is control used around us?
At home
Washing machines
Microwave cookers
Dishwashers
Electric kettles
Fridges
Video recorders
Remote control television
Central heating systems
Burglar Alarm system
External Security lights
Electronic Toys
Games
Smart Meters
At work
Air conditioning systems
Lifts
Automatic doors
Factory robots
Outside the home
Traffic light systems
Car park barriers
Cars – engine management systems
Lifts
Rides at theme parks
Computer controlled lighting systems at discos and concerts
Remote controlled car

7. How do we record them? SENSORS 

8. Feedback is where the output of a system affects the input.
The Feedback System
E.g. Central Heating
You have set your thermostat to 23 degrees.
INPUT: The heat sensor would read the temperature of your home.
PROCESS: Would check the recorded temperature against the temperature you have set (23 degrees).
IF IT IS <23 THEN the OUTPUT would be a signal to switch the heating on.
IF IT IS >=23 THEN the OUTPUT would be a signal to switch the heating off.
IF the heating is switched on, the system would keep checking the temperature, by getting FEEDBACK. Once it reaches 23, the heating would then switch off.
Feedback is where the output of a system affects the input.

9. Task Have a go at the ‘Data Logging Sheet1’ activity.
Help site is available inside the document.
WJEC ICT  Unit 1  Applications  Data Logging  Data Logging Intro
Finished? Have a go at the Exam questions and quiz on teach ICT (link in the folder above)

10. Objectives Review
To understand what is meant by the term data logging.
Know why we use data logging in society.
Know the role of sensors in control technology.

11. Plenary Let’s review the worksheet.
Shortcut in Shared.