AUTOMATED CONTROL

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

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.

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.