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What is the use of TRANSDUCER in Electronic circuits?
Posted Date: 23 May 2008 Resource Type: Articles/Knowledge Sharing Category: Education
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Posted By: nilima Member Level: Bronze
Rating:  Points: 1
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An Electronic instrumentation system consists numbers of components to perform a measurment and record its result.Now a days a generalized measurment
system consists of Three major components.
01) An input device
02) A signal conditioning or processing device
03) An output device
The input device receives the measur and/or the quantity under measurment and delivers a proportional or analogous electrical signal to the signal
conditioning device.Here the signal is amplified,attenuated,filtered,modulated or otherwise modified in format acceptable to the output device.
The input quantity for most instrumentation systems is a "non-electrical quantity".In order to use electrical methods and techniques for measurment,
manipulation or control,the non-electrical quantity is generally converted into an eletrical form by a device called a "Tranducer"
We can define a Tranducer as a device which,when actuated transforms energy from one form to another.
The broad defination of a Transducer includes,for example device which convert Mechanical Force into an Electric Signal.These device form a very
large and important group of Transducers commonly used in industrial instrumentation area.The Instrumentation Engineers and Technologist are therefore primarily concerned with this area of instrumentation.Many other physical parameters,such as heat,intensity of light,flow rate,liquide level,humidity and PH value may also be covered into eletrical form by means of Transducers.These Transducers provide an output signal when stimulated by a Mechanical or non-mechanical input.A photoconduductor converts a Thermocouple,converts heat energy into electrical voltage,a force produces a change of resistance in a strain gauge,an acceleration produces a voltage in a Piezo-electrical crystal and so on.In all cases,however,the electrical output is measured by standard methods,giving the magnitude of the input quantity in terms of a analogous output.
ELECTRIC TRANDUCERS
The art of electrical measurments has been mainly used for measurment of electrical quqntities but its value in making measurments of non-electrical
quantities in this new era of Automation is rapidly growing.In order to measure non-electrical quantities a detector is used which usually converts the
physical quantity into a displacement.
This displacement actutaes an Electric Tranducers,which acting as a secondary Tranducer gives an output that is electrical in nature.The Electrical quantity
so produce is measured by standerd methods used for electrical measurments.The result (Electrical output) gives the magnitude of the physical quantity or
condition being measured.
The electrical signal may be a current or a voltage or a frequency and production of these signals is based upon electrical effects which may be resistive,capacitive,inductive etc.. in nature.
The first stage of a system may be simply be called a Transducer satge instade of detector Transducer satge by redefining a Transducer.
A Transducer,in general form,may be defined as a device which converts energy from one form to another.However this defination has to be restricted
many times especially in the field of eletrical instrumentations.Keeping this restrication in view,a Transducer may be defined as a device which convert a
physical quantity or physical condition into an electrical signal.
For more details, visit http://elctronicsengineering.blogspot.com/
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Responses
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| Author: Vidya 24 May 2008 | Member Level: Diamond Points : 2 | valuable information thanks
| | Author: Shyni 31 May 2008 | Member Level: Gold Points : 2 | This is great Information, Thanks for your effort to share it with everyone.
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