Automated System revision

Automated System

By Kevin Cheong

Open Ended

A sensor and a microprocessor are used to monitor the pH of the cleaning products. The system records each reading that is taken. If the reading is greater than 7 a warning message is displayed on a monitor.

Explain how the sensor and microprocessor are used in the system.

Multiple Choice

Identify the sensor that is being used in the scenario below:

A theme park has a game where a player tries to run from the start to the finish without getting wet.

The system for the game uses sensors and a microprocessor to spray water at a player as they run past each sensor.

Describe how the sensors and the microprocessor are used in this system.

• motion sensor

• temperature sensor

• acoustic sensor

• proximity sensor

Multiple Choice

Identify the sensor that is being used in the scenario below:

A washing machine uses sensors and a microprocessor to control the washing cycle of clothes.

Describe how the sensor and the microprocessor are used to make sure the water remains

at 30 °C.

• motion sensor

• temperature sensor

• acoustic sensor

• proximity sensor

Multiple Choice

Identify the sensor that is being used in the scenario below:

An electronic game has three square mats that are coloured red, green and blue.

The player will see a colour displayed on a screen and has 1 second to hit the mat that matches the colour. If the player hits the correct mat, within 1 second, a counter is incremented. When a player hits an incorrect mat, the game ends.

The game uses sensors and a microprocessor to determine if the player hits the correct mat within 1 second.

• motion sensor

• pressure sensor

• light sensor

• magnetic field sensor sensor

Match

Match the following sensors to its definition

• acoustic sensor

• accelerometer

• Infra-red

• proximity sensor

• level sensor

Detects sound waves in the air

Measures motion, tilt

Detects radiation to sense heat

Sense the presence or distance of object

Determines the height or depth of liquid

• Detects sound waves in the air

• Measures motion, tilt

• Detects radiation to sense heat

• Sense the presence or distance of object

• Determines the height or depth of liquid

1. {sensor} is used
2. {sensor} continuously sends digitised data to the microprocessor
3. The microprocessor compares the data to a stored value / range of values
4. If the value is within the range, {system does a certain action}
5. If value out of range, {system does another action}
6. {action} is done using an actuator
7. Process is {continuous / repeats until turned off}

1. {sensor} is used
2. {sensor} continuously sends digitised data to the microprocessor
3. The microprocessor compares the data to a stored value / range of values
4. If the value is within the range, {a signal is sent to the robot to do action}
5. If value out of range, {a signal is sent to the robot to do another action}
6. {action} is done using an actuator
7. Process is {continuous / repeats until turned off}

Open Ended

The robot plants seeds and stops when it reaches a fence. It then turns and continues planting

seeds. The robot uses sensors and a microprocessor to know when it reaches a fence.

Explain how the robot uses sensors and a microprocessor to know it has reached a fence.

Open Ended

An electronic game has three square mats that are coloured red, green and blue.

The player will see a colour displayed on a screen and has 1 second to hit the mat that matches the colour. If the player hits the correct mat, within 1 second, a counter is incremented. When a player hits an incorrect mat, the game ends.

The game uses sensors and a microprocessor to determine if the player hits the correct mat within 1 second.

Explain how the game uses sensors and a microprocessor to count the number of times a player hits a correct mat within 1 second.