Transducer and type of transducer ~ Electrical & Electronics Knowledge

Transducer:-

The device which converts the one form of energy into another is known as the transducer. The process of conversion is known as transduction. The conversion is done by sensing and transducing the physical quantities like temperature, pressure, sound, etc.

The electrical transducer converts the mechanical energy into an electric signal. The electrical signal may be voltage, current and frequency. The production of the signal depends on the resistive inductive and capacitive effects of the physical input.

Transducer Types and It's Application:-

There are a variety of transducer types like pressure transducer, piezoelectric transducer, ultrasonic transducer, temperature transducer, and so on. Let us discuss the use of different types of transducers in practical applications.

Some transducer types like active transducer and passive transducers are based on whether a power source is required or not.Active transducer doesn’t require any power source for their operations. These transducers work on the principle of energy conversion. They generate an electrical signal that is proportional to the i/p. The best example of this transducer is thermocouple. Whereas passive transducer requires an external power source for their operation. They generate an o/p in the form of capacitance, resistance. Then that has to be converted to an equivalent voltage or current signal. The best example of a passive transducer is a photocell.

Ultrasonic Transducer:-

The main function of the ultrasound transducer is to convert electrical signals to ultrasound waves. This transducer can also be called as capacitive or piezoelectric transducers.

Application of Ultrasonic Transducer:-

This transducer can be used to measure the distance of the sound based on reflection. This measurement is based on a suitable method compared to the straight methods which use different measuring scales. The areas which are hard to find, such as pressure areas, very high temperature, using conventional methods the measurement of the distance is not a simple task. So, this transducer-based measuring system can be used in this kind of zone.

Temperature Transducer:-

Temperature transducer is an electrical device that is used to convert the temperature of a device into another quantity like electrical energy or pressure or mechanical energy, then the quantity will be sent to the control device for controlling the temperature of the device.

Application of Temperature Transducer:-

Temperature transducer is used to measure the temperature of the air such that to control the temperature of several control systemlike air-conditioning, heating, ventilation, and so on.Let us consider a practical example of a temperature transducer that is used to control the temperature of any device based on the necessity for different industrial applications. An Arduino based automatic fan speed regulator controlling of temperature and exhibiting a measure of temperature on an LCD display.In the proposed system, IC LM35 is used as a temperature transducer.

Piezoelectric Transducer:-

A piezoelectric transducer is a special kind of sensor, and the main function of this transducer is to convert mechanical energy into electrical energy. In the same way, electrical energy can be transformed into mechanical energy.

Piezoelectric Transducer Applications:-

This transducer is mainly used to detect the sticks drummer’s impact on electronic drum pads. And also used to detect the movement of the muscle, which can be named as acceleromyography.
The load of the engine can be determined by calculating diverse absolute pressure, that can be done by using these transducers as the MAP sensor in fuel injection systems.
This sensor can be used as a knock sensor in automotive engine management systems for noticing knock of the engine.

Pressure Transducer:-

A pressure transducer is a special kind of sensor that alters the pressure forced into electrical signals. These transducers are also called as pressure indicators, manometers, piezometers, transmitters, and pressure sensors.

Application of Pressure Transducer:-

The pressure transducer is used to measure the pressure of the specific quantity like gas or liquid by changing the pressure into electrical energy. The different kinds of these transducers like an amplified voltage transducer, strain-gage base pressure transducer, millivolt (mv) pressure transducer, 4-20mA pressure transducer, and pressure transducer.The applications of pressure transducer mainly involve in altitude sensing, pressure sensing, level or depth sensing, flow sensing and leak testing. These transducers can be used for generating an electrical power under the speed breakers on the highways or roads where the force of the vehicles can be converted into electrical energy.

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