Transducers
Transducers are electric or electronic devices that transform energy from one form to another.There are many different types of transducers, but at their most basic, they can be divided into two groups :
– Input transducer (sensor) Convert physical energy -> Electrical energy
– Output transducer (actuator) Convert Electrical energy -> physical energy
Input Transducers (Sensor)
Input Transducers convert a quantity to an electrical signal (voltage) or to resistance
(which can be converted to voltage). Input transducers are also called sensors.
Examples:
- LDR converts brightness (of light) to resistance.
- Thermistor converts temperature to resistance.
- Microphone converts sound to voltage.
- Variable resistor converts position (angle) to resistance.
Output Transducers (Actuator)
Output Transducers convert an electrical signal to another quantity.
Output transducers are also called actuators.
Examples:
- Lamp converts electricity to light.
- LED converts electricity to light.
- Loudspeaker converts electricity to sound.
- Motor converts electricity to motion.
- Heater converts electricity to heat.
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Sensor Terminology
http://zone.ni.com/devzone/cda/ph/p/id/227
Sensor Terminology (PDF version)
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Products
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References
. sensores ( pdf file) Jaime Fonseca / University of Minho
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