A transducer is a device, usually electrical, electronic,
electro-mechanical, electromagnetic, photonic, or photovoltaicthat converts one type of energyor physical attribute to another for various purposes including measurement or information transfer (for example, pressure sensors).
The term transducer is commonly used in two senses; the
sensor, used to detect a parameter in one form and report it in another (usually an electrical or digital signal), and the audio loudspeaker, which converts electrical voltage variations representing music or speech, to mechanical cone vibration and hence vibrates air molecules creating acoustical energy.
Types of transducers
**Antenna - converts electromagnetic waves into electric current and vice versa.
Cathode ray tube(CRT) - converts electrical signals into visual form
Fluorescent lamp, light bulb- converts electrical power into visible light
Magnetic cartridge- converts motion into electrical form
Photodetectoror Photoresistor(LDR) - converts changes in light levels into resistance changes
Tape head- converts changing magnetic fields into electrical form
Hall effect sensor- converts a magnetic field level into electrical form only.
Electro-galvanic fuel cell
*Electromechanical (electromechanical output devices are generically called
Vibration powered generator
Potentiometerwhen used for measuring position
Load cellconverts force to mV/V electrical signal using strain gauge
Air flow sensor
Geophone- convert a ground movement (displacement) into voltage
Hydrophone- converts changes in water pressure into an electrical form
Loudspeaker, earphone- converts changes in electrical signals into acoustic form
Microphone- converts changes in air pressure into an electrical signal
**Piezoelectric crystal - converts pressure changes into electrical form
Laser diode, light-emitting diode- convert electrical power into forms of light
Photodiode, photoresistor, phototransistor, photomultipliertube - converts changing light levels into electrical form
**RTD Resistance Temperature Detector
Thermistor(includes PTC resistor and NTC resistor)
Geiger-Müller tubeused for measuring radioactivity.
* J. Allocca and A. Stuart, "Transducers: Theory and Application", Reston 1984.
* [http://www.wisegeek.com/what-are-transducers.htm What are Transducers?]
* [http://www.its.bldrdoc.gov/fs-1037/dir-037/_5539.htm Federal Standard 1037C, August 7, 1996: transducer]
* [http://www.atis.org/tg2k/_transducer.html American National Standard for Telecommunications - Telecom Glossary 2000: transducer]
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Look at other dictionaries:
Transducer — [træns djuːsə, englisch] der, s/ , allgemeine Bezeichnung für Wandler, im engeren Sinn der Messumformer … Universal-Lexikon
transducer — (n.) 1924, device which converts energy from one form to another, from L. transducere lead across, transfer, from trans across (see TRANS (Cf. trans )) + ducere to lead (see DUKE (Cf. duke) (n.)) … Etymology dictionary
transducer — Transducer Трансдьюсер Устройство, преобразующее отклик распознающего элемента (физической или химической природы) в измеряемый сигнал (как правило, электрический), величина которого пропорциональна концентрации определяемого вещества или… … Толковый англо-русский словарь по нанотехнологии. - М.
transducer — ► NOUN ▪ a device that converts variations in a physical quantity (such as pressure or brightness) into an electrical signal, or vice versa. DERIVATIVES transduction noun. ORIGIN from Latin transducere lead across … English terms dictionary
transducer — [trans do͞os′ər, tranzdo͞os′ər; trans dyo͞os′ər] n. [< L transducere, to lead across < trans , over + ducere, to lead (see DUCT + ER] any of various devices that transmit energy from one system to another, sometimes one that converts the… … English World dictionary
transducer — /trans dooh seuhr, dyooh , tranz /, n. a device that receives a signal in the form of one type of energy and converts it to a signal in another form: A microphone is a transducer that converts acoustic energy into electrical impulses. [1920 25; < … Universalium
transducer — UK [trænzˈdjuːsə(r)] / US [trænzˈdusər] noun [countable] Word forms transducer : singular transducer plural transducers physics a piece of equipment that gets power from one source and then changes that power so that it can be used by another… … English dictionary
transducer — noun Date: 1924 a device that is actuated by power from one system and supplies power usually in another form to a second system < a loudspeaker is a transducer that transforms electrical signals into sound energy > … New Collegiate Dictionary
Transducer — An instrument that converts electrical energy into mechanical energy. A transducer can also act as a transmitter and receiver of ultrasound information. * * * A device designed to convert energy from one form to another. SEE ALSO: transduction.… … Medical dictionary
transducer — eddy current transducer … Mechanics glossary