Question

Which of the following statements about sensors and actuators are true? (select 3):

A.Transducers change their physical properties in response to changes in the environment.
B.The Wheatstone Bridge converts a change in resistance into a change in voltage.
C.All sensors use instrumentation amplifiers.
D.Analogue to digital converters are needed to convert numbers produced by a computer into signals that can control actuators.
E.Strain gauges could be used to detect deflection in a concrete beam.

Answer 1

Transducers change physical properties, the Wheatstone Bridge converts resistance to voltage, and ADCs are needed to convert computer-produced numbers for actuator control.

Step-by-step explanation:

The true statements about sensors and actuators are:

1. Transducers change their physical properties in response to changes in the environment. For example, a strain gauge can detect deflection in a concrete beam by measuring changes in resistance.
2. The Wheatstone Bridge converts a change in resistance into a change in voltage. This bridge circuit is commonly used for measuring strain and pressure.
3. Analog to digital converters are needed to convert numbers produced by a computer into signals that can control actuators. These converters convert analog signals into digital signals that can be understood by the computer.