Monitoring & Control SystemSaranya. V

AP/CSE,Sri Vidya College of Engineering & Technology,

Virudhunagar

• An important category of Real Time Systems.• Continuously checks the sensors and Executes

actions depending on sensor values.• Monitoring systems examine sensors and

report their results.• Control systems take sensor values and

control hardware actuators.

Example: Burglar Alarm System

• System is required to monitor sensors on doors and windows to detect the presence of intruders in a building.

• When a sensor indicates a break-in, the system switches on lights around the area and calls police automatically.

• The system include provision for operation without a mains power supply.

Components of Burglar Alarm System

• Used to prevent strangers.• Door alarms– Two parts• Sensor mounted on the frame of the door or

embedded directly into the wood.• Magnet- mounted or embedded on the floor itself

(holds the sensor’s trigger in place).• When the door is open, the magnet pulls away from

the sensor, and activating the alarm.

Sensors: Movement detectors Window sensor, door sensor Voltage drop sensor Totally 50 window, 30 door and 200 movement detectors

are available.Actions: When a intruder is detected, police are called

automatically. Lights are switched on in rooms with active sensors. Audible alarm is switched on. The system switches automatically to backup power

when a voltage drop is detected.