1.3.3.c Microprocessor Controlled Systems

A device which detects and/or measures a physical property.

• Processor

• Transmitter

• Actuator

• Sensor

The component in a control system that is responsible for moving and controlling a mechanism or system, for example switching on lights, openning&closing doors etc.

• ADC

• Transmitter

• Actuator

• Sensor

PH sensor measures how acidic or alkaline a material is.

Which of the following is not possibly a place PH sensor would be used?

• Water treatment plants

• Pollution monitoring (river)

• Greenhouse

• Smartphone

Which of the following is not a sensor type?

• Motor

• Motion

• PH

• Proximity

Which of the following is not a sensor type?

• Relay

• O2

• Lidar

• Pressure

Which of the below sensor and its use is wrong?

• Proximity - Used when parking cars to judge distance

• Switch - Turned on or off when motion is detected

• Pressure - Used to set alarm in a burglar protection system

• CO2 - Used to set alarm in a chemical factory

The output of a sensor is ...

• analogue

• digital

A sensor converts changes of physical phenomena into electrical signals.

• True

• False

The output of a sensor is directly sent to the microprocessor.

• True

• False

The output of a sensor is sent to an ADC to be converted into analog signal so that the microprocessor can process it.

• True

• False