Electrical Transducer Working and Advantages

A transducer is an electrical device, used to convert one form of energy into another form. The form of energy may be electrical, mechanical, thermal or optical. The best examples of transducer mainly include a microphone, loudspeaker, etc. A loudspeaker is one kind of transducer used to change the low-frequency signal to high-frequency signal like audible sound. Similarly, a microphone is also a transducer that converts the variations of sound pressure into current otherwise voltage. Therefore, these two transducers are considered complementary transducers. The transducer can be used as both inputs as well as outputs for electronic circuits. For instance, in an audio system, a loudspeaker is used as an output. Similarly, in a recording system, a microphone is used as an input transducer.

What is an Electrical Transducer?

An electrical transducer can be defined as, a transducer which gives electrical energy as an output. These transducers convert one form of energy into an electrical signal. Here one form of energy may be heat, light, or sound and the electrical signal can be frequency, current or voltage. These signals production can depend on the effects of resistive, capacitive and inductive. The nonelectrical quantities can be measured by using a detector which changes the physical quantity to a displacement to activate the transducer.

Types of Electrical Transducer

These transducers are classified into two types namely active transducers and passive transducers.

1). Active Transducer

This transducer is also named as -self-generating transducer. They generate their voltage or current signal. The required energy for output signal production can be attained from the energy required for the production of this output signal is obtained from the physical occurrence being calculated. The best examples of active transducers are a thermocouple, PV cell, piezoelectric transducer, photoelectric cell, moving coil generator, etc

2). Passive Transducer

This transducer is also named as an externally power-driven transducer. They derive the required power for energy change from an exterior power source. Further, these transducers are classified into resistive, capacitive and inductive. The resistive type mainly includes a thermistor, resistance strain gauge, and photoconductive cell. The inductive type includes LVDT and capacitance includes photoemissive and the devices which are based on Hall Effect.

Apart from these, optoelectronic transducers are there which use the principle of converting the energy from light to electrical. Some of the examples of optoelectronic transducers are a photoconductive cell, photovoltaic cell, solar cell, photomultiplier tube, and photomultiplier.

Advantages

The advantages of this transducer mainly include the following.

• Attenuation can be done easily.
• Mass inactivity effects can be reduced.
• Friction effects can be reduced.
• The o/p can be specified & recorded remotely at a distance from the sensing medium.
• The signal can be mixed to get any permutation with outputs of related transducers otherwise control signals.,
• Any system can be managed with a less power level.
• The output can be simply utilized to transmit as well as the process for measurement.

Thus, this is all about electrical transducer and the selection of this transducer can be done based on the parameters like operating range, accuracy, sensitivity, resonant frequency, frequency response, ruggedness, etc. Here is a question for you, what are the applications of electrical transducer?