SECTION 4: AUTOMATED CONTROL
19. Provide
an overview of automated control.
Automated control is the mechanised command of a task or several tasks.
The machine that controls the commands and operations are most often computers
using programs that provide instructions of how to produce the output required
based on the input instructions.
23. Provide an overview of Traffic Light sensing devices and relevant pictures
23. Provide an overview of Traffic Light sensing devices and relevant pictures
Traffic light sensors use computer tracking devices to carry out their
operations. Input comes from sensors that are installed under the road that
monitor vehicle activity. Cars that travel over the sensors is counted by the
sensor and then the traffic signals are changed based on and to meet the
changing traffic patterns on the road. The sensors are wired loops that contain
a electromagnetic field that are linked to the electrical meter. Maintenance is
needed for the traffic light sensors and when a sensor does become faulty it
must be attended to. SCATS (the Sydney Coordinated Adaptive Traffic System)
professionals are responsible for repair of these sensors in which they fix the
problem via the system computer.
![Description: http://static.ddmcdn.com/gif/red-light-camera-loop.gif](file:///C:/Users/BENGLE~1/AppData/Local/Temp/msohtmlclip1/01/clip_image001.gif)
24.
Provide an
overview of actuators and sensors to open and close doors. Please add relevant
pictures. (p. 266)
Automated doors that open and close are
controlled by sensor that detect movement in which the motors (displayed in the
picture) then carry out the tasks of either opening or closing the door,
allowing the person(s) to pass through. There are a range of sensors that are
used on automatic doors including motions sensors that use infra-red beams in
which detects when the beam is broken, pressure sensors that use under mats
that use under mats that measure weight is placed on it in which activates a
switch opening the door. In the case of automated doors, actuators are used to
carry out the action needed that is in response to a signal given by the
sensor.
![Description: http://www.mpkcontrols.co.uk/wp-content/uploads/2013/02/Combined-photo.jpg](file:///C:/Users/BENGLE~1/AppData/Local/Temp/msohtmlclip1/01/clip_image003.jpg)
![Description: http://www.dsdal.co.uk/images/Actuator3_h255.jpg](file:///C:/Users/BENGLE~1/AppData/Local/Temp/msohtmlclip1/01/clip_image005.jpg)
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