Automated Systems
- Automated systems use sensors, a microprocessor and actuators
- Sensors detect changes in the environment and convert them into electrical signals that can be processed by a microprocessor
- Microprocessors analyse the signals from the sensors and make decisions based on pre-programmed logic
- Actuators receive signals from the microprocessor and perform actions such as opening a valve or turning on a motor
- By combining sensors, microprocessors, and actuators, automated systems can be created that respond to changes in the environment without human intervention
Here are some scenarios where automated systems are used
|
|
|
Industry |
|
|
Transport |
|
|
Agriculture |
|
|
Weather |
|
|
Gaming |
|
|
Lighting |
|
|
Science |
|
|
Worked example
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
[8]
- A motion sensor collects analogue data [1]
- This data is converted to digital using ADC [1]
- The sensor sends data to the microprocessor [1]
- where the data is compared to stored data [1]
- If the value is outside range water will be sprayed [1]
- A signal is sent to the actuator to spray water [1]
- If the value is within range no action is taken [1]
- This runs in a continuous loop [1]
Exam Tip
- The way marks are awarded on these questions is very similar. Make sure you relate your answer specifically to the scenario in the question