Active and Passive Transducer and Their Differences

There are different physical forces which we cannot measure easily such as pressure, displacement, humidity and many more. But to measure all these forces, a device is necessary which can change the physical quantities into easily assessable energy. This conversion can be done by using the transducer. These devices play an essential role in fields like control engineering, instrumentation, etc. Any kind of energy must be changed while processing from one form to another to create the communication from one modification sector to a different one. This article discusses an overview of the active and passive transducer.

Difference between Active and Passive Transducer

The main difference between active and passive transducer mainly include what is a transducer, types, and difference between active and passive transducers.

What is Transducer?

The transducer is one kind of electrical or electronic component, and the main function of this is to change one kind of energy into another. The best examples of transducers are a microphone, a solar cell, an incandescent light bulb, and an electric motor. As these transducers play a key role while changing the energy from one form to another form.

what-is-a-transducer
what-is-a-transducer

Types of Transducers

Transducers are classified into two types namely active & passive transducers.

1). Active Transducer

The active transducer is one kind of device which can be used to change the specified energy which is non-electrical into electrical. The best examples of this transducer mainly include PV cell, thermocouple, etc.

2). Passive Transducer

The passive transducer is one kind of device which can be used to change the specified energy which is non-electrical into electrical with external power. The best examples of this transducer mainly include a differential transformer, resistance strain, etc.

Differences between Active & Passive Transducer

The main difference among the active and passive transducer are listed below.

 Active Transducer

 Passive Transducer

An active transducer can be defined as, a transducer which gives the output in different forms like current or voltage without using any exterior source of energy.

The passive transducer can be defined as the internal parameters of transducer like resistance-capacitance as well as inductance are changed due to the input signal.

 

The working principle of this transducer is, it uses the measured source to draw the energy.

The working principle of this transducer is, it uses exterior power to change the transducer’s physical properties.

The extra energy source is not necessary

It requires an extra energy source.
The resolution of this transducer is low The resolution of this transducer is high
The designing of this transducer is very simple

The designing of this transducer is complicated

The output signal of this transducer can be generated from the signal which is to be calculated. The output signal of this transducer can be obtained by receiving the signal from the exterior power source.
The best examples of this transducer mainly include PV cell, thermocouple, etc.

 

The best examples of this transducer mainly include a differential transformer, resistance strain, etc.

 

This transducer provides electric current otherwise voltage straight in reply to ecological stimulation.

It provides some change within passive electrical amount like resistance, capacitance, and inductance based on the simulation result.

Thus this is all about an overview of what is an active and passive transducer, and differences between them. From the above information finally, we can conclude that these types of transducers can change the physical energies into easily calculated energies. The active transducer changes the energy without using the auxiliary power supply whereas the passive transducer uses the exterior power supply for the conversion of energy. Here is a question for you, what are the advantages and disadvantages of Active and Passive Transducer?

 

 

 

 



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