24-04-2012, 11:42 AM
TRANSDUCER
9EE305.43.ppt (Size: 903.5 KB / Downloads: 154)
Measurement of non electrical quantities
Two options
(either)
To measure directly with non electrical instruments
Ex: Temperature with thermometer
(or)
To measure with electrical instrument by converting the
non electrical quantity into an electrical quantity
Ex: speed with tachometer
Measurement of non electrical quantities
The measured electrical quantity is proportional to the original non electrical quantity
Hence
The scale of the electrical instrument can be calibrated directly to give the value of the non electrical quantity
Definition of a transducer
A device
that receives energy from a system
and
transmits it to another system
in the same form or in another form
Applications cont..
Leak detection
Energy management,
Material durability testing,
Batch weighing,
Closed loop servo system,
Weighed moon rock,
Thickness of (unbroken ) egg shell,
The firmness of onions,
The rate of fruit growth