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Unit 3.4 Automation
Page 157


7. Complete the text with the correct words.

SENSORS AND ACTUATORS
Sensors and actuators are components of the AS-Interface in 1. and PC-based automation systems.
Sensors transform 2. detected from the environment into electrical 3. . Then, these signals are sent to the PLC.
The main types of sensors are: temperature sensors, 4. sensors, level sensors, 5. sensors, and proximity sensors.
Instead, 6. transform electrical signals into 7. outputs. Their main types include pneumatic, 8. , and electric ones.
8.1 Say if the sentence refers to a sensor, an actuator, or both: it provides mechanical energy to a connected appliance.
8.2 Say if the sentence refers to a sensor, an actuator, or both: it is connected to the PLC and to the physical environment.
8.3 Say if the sentence refers to a sensor, an actuator, or both: it is very important for the maintenance of automated systems.
8.4 Say if the sentence refers to a sensor, an actuator, or both: it receives signals from the external world.
8.5 Say if the sentence refers to a sensor, an actuator, or both: it can provide movement to a device.
8.6 Say if the sentence refers to a sensor, an actuator, or both: it is used in combination with other devices.
8.7 Say if the sentence refers to a sensor, an actuator, or both: different types are employed according to the kind of equipment they are connected to.
8.8 Say if the sentence refers to a sensor, an actuator, or both: it has an important impact on industrial systems.
9.1 Listen and decide if the sentences are true (Vero) or false (Falso).
1. Sensors are not very common in our lives.
2. In a house, sensors can only be used to control heaters.
3. Some sensors can control and regulate room temperature.
4. The Automatic Flight Control System is used only in military airplanes.
5. Some sensors in the plane control how high the plane is flying.
6. The values detected by the sensors are processed by a computer.
7. These values are compared with data previously inserted into the computer.
8. The computer only provides control signals to the engine of a plane.
9. The computer can be defined as the brain of the whole system.
10. Sensors are the most important components of the Autopilot system.
9.2 Correct the false sentences from the previous exercise. aperta