Abstract
Transducers are electric or electronic devices that transform
energy from
one manifestation into another. Most
people, when
they
think of transducers,
think specifically of
devices that perform this
transformation
in order to gather or transfer information,
but really,
anything that
converts energy can
be considered a transducer.
Transducers that detect
or transmit information
include
common
items
such
as microphones,
Geiger
meters, potentiometers, pressure sensors, thermometers,
and antennae. A microphone, for example, converts sound
waves
that strike its diaphragm
into an analogous electrical signal that can
be
transmitted
over wires. A pressure sensor turns the physical force being exerted on the sensing apparatus
into an analog
reading that
can
be easily represented. While many people think of transducers as being some sort of technical
device,
once you start looking for them, you
will
find
transducers everywhere in your everyday life.
There are two methods of measurement
of any physical
quantity
1) The direct
method
and
2) The indirect method.
In the direct method any physical
quantity like length, mass, etc
are measured directly by some instruments like the
measuring tape,
weighing scale etc. In
the indirect method of measurements some transducing
devise, called
transducer, is used, which is coupled
to a chain of the connecting apparatus that forms
the
part of the measuring system. In
this system the quantity which
is to be measured (input)
is converted into some other measurable quantity (output)
by
the transducer.
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