A transducer is a device that converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another.[1]

Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc.). The process of converting one form of energy to another is known as transduction.[2]

Types

Mechanical transducer
Mechanical transducer

Transducers that convert physical quantities into mechanical quantities are known as mechanical transducers; transducers that convert physical quantities into electrical quantities are known as electrical transducers. Examples are a thermocouple that changes temperature differences into a small voltage, or a linear variable differential transformer (LVDT) used to measure displacement.

Sensors and actuators

Transducers can be categorized by which direction information passes through them:

Active vs passive sensors

Characteristics

Some specifications that are used to rate transducers:

Applications

Transducers are used in electronic communications systems to convert signals of various physical forms to electronic signals, and vice versa. In this example, the first transducer could be a microphone, and the second transducer could be a speaker.
Transducers are used in electronic communications systems to convert signals of various physical forms to electronic signals, and vice versa. In this example, the first transducer could be a microphone, and the second transducer could be a speaker.

See also

References

  1. ^ Agarwal, Anant. Foundations of Analog and Digital Electronic Circuits.Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 2005, p. 43
  2. ^ a b c d e f g Winer, Ethan (2013). "Part 3". The Audio Expert. New York and London: Focal Press. ISBN 978-0-240-82100-9.
  3. ^ Fraden J. (2016). Handbook of Modern Sensors: Physics, Designs, and Applications 5th ed. Springer. p.1
  4. ^ Kalantar-zadeh, K. (2013). Sensors: An Introductory Course 2013th Edition. Springer. p.1
  5. ^ a b Fraden J. (2016). Handbook of Modern Sensors: Physics, Designs, and Applications 5th ed. Springer. p.7