Transducer | Electrical Seminar Topic
Transducer
A transducer is a device, usually electrical, electronic,
electro-mechanical, electro-magnetic, photonic, or photovoltaic that converts
one type of energy or physical attribute to another (generally electrical or
mechanical) for various measurement purposes including measurement or
information transfer.The term transducer is commonly used in two senses- the
sensor used to detect a parameter as a form of energy and a translator which
translates that form to an easily measurable form.
Electrical transducers are defined as the transducers which
convert one form of energy to electrical energy for measurement purpose. The
quantities which cannot be measured directly like pressure, displacement,
temperature, etc. Are required to be sensed and changed into electrical signal
for easy measurement.
Main objective of a transducer is to react only for the
measurement under specified limits for which it is designed. A transducer
should have the following basic requirements:
LINEARITY
Its input versus output characteristics should be linear and
it should produce these characteristics in a balanced way.
RUGGEDNESS
It should be capable of withstanding overload and some
safety arrangements must be provided with it for overload protection.
REPEATABILITY
It should be capable of reproducing the same output signal
when the same input signal is applied again and again under unchanged
environmental conditions, e.g., temperature, pressure, humidity, etc.
HIGH RELIABILITY AND STABILITY
The transducer should give minimum error in measurement for
temperature variations, vibrations and other various changes in the
surroundings.
HIGH OUTPUT SIGNAL QUALITY
The quality of output signal should be good, i.e., the ratio
of signal to the noise should be high and amplitude of the output signal should
be enough.
