monitoring and control systems

Reorder the following:

Example: Automatic Adjustment in an Air Conditioning Temperature Control System

Assume you set the target temperature of the air conditioner to 24°C, and the current temperature in the room is 26°C

Repeating Feedback Adjustment: As the temperature gradually approaches 24°C, the microprocessor reduces the cooling power to ensure that the temperature does not drop too low. The system automatically adjusts until the temperature stabilizes around 24°C.

Generating Control Command: Based on the error value, the microprocessor generates a control signal indicating that the air conditioner should increase the cooling power to try to lower the room temperature.

Calculating Error: The microprocessor compares the current temperature with 24°C and finds an error of 2°C.

Executing Adjustment: The air conditioner increases its cooling, and the room temperature begins to decrease. The sensor continuously monitors the new temperature and provides feedback to the microprocessor.

Monitoring Temperature: The temperature sensor detects that the current temperature is 26°C and sends this information to the microprocessor.

• Executing Adjustment: The air conditioner increases its cooling, and the room temperature begins to decrease. The sensor continuously monitors the new temperature and provides feedback to the controller.

• Monitoring Temperature: The temperature sensor detects that the current temperature is 26°C and sends this information to the microprocessor.

• Repeating Feedback Adjustment: As the temperature gradually approaches 24°C, the controller reduces the cooling power to ensure that the temperature does not drop too low. The system automatically adjusts until the temperature stabilizes around 24°C.

• Generating Control Command: Based on the error value, the microprocessor generates a control signal indicating that the air conditioner should increase the cooling power to try to lower the room temperature.

• Calculating Error: The controller compares the current temperature with 24°C and finds an error of 2°C.

What are the aspects of the systems?

a

b

c

d

e

f

g

h

i

j

 involving control algorithms, actuators

Collects, records, and displays sensor d

System Complexity

sensor data and makes decisions to adjus

Automated operation, adjusting

adjusts the system in a closed - loop co

Environmental monitoring systems

Relatively simple, responsible only for

Data collection and monitoring to observ

only one - way data flow and monitoring

In a monitoring system, which component measures physical properties?

• Actuator

• Sensor

• CPU

• Register

Which device is required in a control system but not in a simple monitoring system?

• Sensor

• Actuator

• ADC

• Register

An actuator is usually:

• A sensor producing voltage

• A motor or device that performs an action

• A converter of binary signals

• A device for storing values

The purpose of an ADC in a control system is to:

• Convert digital to analogue signals

• Convert analogue sensor signals to digital

• Store sensor data

• Control actuators

The purpose of a DAC is to:

• Convert analogue to digital signals

• Convert digital signals to analogue

• Compare sensor readings

• Output binary to registers

Which type of system sounds an alarm when a measurement is too high but takes no corrective action?

• Monitoring system

• Control system

• Closed-loop system

• Embedded system

A closed-loop feedback system uses:

• Sensors only

• Continuous feedback from output to controller

• Pre-set instructions only

• Human monitoring

An example of a closed-loop feedback system is:

• Temperature logging system

• Washing machine water level control

• Weather data recorder

• Barcode scanner