INDUCTIVE TRANSDUCER FOR MOTION

MEASUREMENT

•A transducer is a device that converts one form of energy to another. • While the term transducer commonly implies the use of a sensor/detector, any device which converts energy can be considered a transducer. Transducers are widely used in measuring instruments.

WHAT DO YOU MEAN BY TRANSDUCER????

In inductive transducer, magnetic characteristics of an electric circuit changes due to motion of object

WHAT IS INDUCTIVE TRANSDUCER?????

A simple type of displacement sensor is the variable inductance type wherein the variation of inductance as a function of displacement is achieved either by variation in mutual inductance or self inductance

INDUCTIVE TRANSDUCER

SELFGENERATING

NON-SELFGENERATING

SELF GENERATING

:

•A voltage signal is generated in the transducer, because of relative motion of the conductor and a magnetic field.EXAMPLE: 1. ELECTRODYNAMIC 2. ELECTROMAGNETIC 3. EDDY CURRENT TYPE ,etc.

NON SELF GENERATING

:

Also called as external power source of transducers, in which an external source is needed to energise coils, the inductance of which would change due to motion of the object.

1. LVDT type2. Air gap type3. Attachment type inductance transducer, etc.

ATTACHMENT TYPE

VARIABLE INDUCTANCE TRANSDUCER FOR

ROTARY MEASUREMENT

PROXIMITY TYPE INDUCTANCE TRANSDUCER

LVDT

Where, f=excitation signal frequency Ip=primary current Np=nos of turns in primary Ns=nos of turns in secondary b= width of primary coil w= width of secondary coil x= core displacement r0= outer radius of the coil ri = inner radius of the coil