Pressure transducer is a special kind of sensor that alters the pressure forced into electrical signals. Variable inductive transducer may be classified as follows Some of the criteria for the classification are based on their area of application, Method of energy conversion, Nature of output signal, According to Electrical principles involved, Electrical parameter used, principle of operation, & Typical applications. The active transducers are self-generating devices which operate under the energy conversion principle. Does not need any external energy source but directly generates an electric signal in response to the external. A measurement system consists of sensors, actuators, transducers and signal processing devices. Electronics Club website is a place for any student or people, those are interested to know about the basic ideas of Electronics and Communication Engineering. The mechanical signal produced by the primary transducer converts into an electrical signal by the electrical device and it is called a secondary transducer. Measurement is an important subsystem in any major system, whether it may be a mechanical system or an electronic system. 5. The thermocouple acts as a transducer but the additional circuits or components needed like the voltmeter, a display etc together from a temperature sensor.. The concept of precision refers to the degree of reproducibility of a measurement. Copyright © Electronics Club All rights reserved. Analog and digital transducers. We'll assume you're ok with this, but you can opt-out if you wish. The purpose of most ultrasonic transducers is to convert electrical energy to acoustic energy, do something useful with the acoustic energy, and convert the acoustic energy back into electrical energy. Photovoltaic Transduction: In photovoltaic transduction, the measurand is converted to the voltage generated when the junction between dissimilar materials. Here, the output is defined as electrical quantity and measured as a physical quantity. Fig 1.2. For example, it corresponds to the last stable figure on a digital display. They are also known as the external power transducer. Tansducers converts non-electrical quantity to electrical quantity while inverse transducers convert electrical quantity to a non electrical quantity. PRESENTATION ON Classification Of Transducer INDUSTRIAL INSTRUMENT (2170913) Department Of Electrical Engineering B.H.Gardi College Of Engineering & Technology Submitted To:- Asst Prof. Amit A Kulkarni Prepared By:- Jaydeep Chandra (140040109009) 1 Classification of transducers The transducers can be classified as: I. That means every sensor is an energy converter. It can be defined as the ratio of the incremental output and the incremental input. By moving a magnet to alter the magnetic flux through a coil thus generating an electromotive force (EMF) according to Faraday’s law. Let us see a few of them. Variation in Inductance 3. While defining the sensitivity, we assume that the input-output characteristic of the instrument is approximately linear in that range. Electromagnetic transduction: In this transduction, the measurend is converted to the voltage induced in a conductor by the change in the magnetic flux, in the absence of excitation. electrical-transducer Types of Electrical Transducer. The capacitive, resistive and inductive transducers are the example of the passive transducer. Sensitivity: The sensitivity of the electrical transducer is defined as the electrical output obtained per unit change in the physical parameter of the input quantity. Thermocouple, Photodiode, Piezoelectric sensor. temperature to electric potential, without any external source of energy being used. A mechanical force or displacement being converted into an electrical signal. Some transducers consist of a mechanical device along with an electrical device. The transducers need an external source of power for their operation. Definition of Transducer: The transducer is a device that is used to converts a physical identity to be measured into an equivalent electrical signal (voltage or current). The physical parameters such as Flow, Level, Temperature, Pressure, etc.. 8. Therefore, an electrical device acts as a secondary transducer. A strain gauge, LVDT, Thermocouples, or thermistors are called analog transducers as they give an output that is a continuous function of time. To produce a proportional electrical signal.. 1 Classification of transducers Active Transducer The transducers, which develop their output in form of electrical voltage or current The device manager will use the transducer’s o / p right away. Range. Mechanical Transducers 1. The linearity of the transducer is an expression of the extent to which the actual measured curve of a sensor departs from the ideal curve. Classification of Transducer 1. The output of the analog transducers is in the analog form that means it is a continuous function of time. The transducers can be categorized on the basis of the output which may be a continuous function of time or the output may be in discrete steps. These transducers produce the output signal in the form of variation in resistance, capacitance or some other electrical parameter in response to the quantity to be measured. These transducers do not need any external source of power for their operation. This transducer is also named as -self-generating transducer. In capacitive transduction, the quantity to be measured is converted into a change in capacitance. Classification of Transducers The Classification of Transducers is done in many ways. Digital transducers generate an electrical output in the form of pulses which form a unique code. The sensor converts any form of energy to an electrical signal, the Transducer converts one form of energy to another. Save my name, email, and website in this browser for the next time I comment. These type of electrical devices are known as secondary transducers. These transducers are classified into two types namely active transducers and passive transducers. At the output of active transducers, we get equivalent electrical output signal e.g. The following are the advantages of converting the physical quantity into an electrical signal. Hence the transducer will just convert the energy from one form to another and all the remaining work is done by the additional … The example of analog transducers is a thermocouple, LVDT, strain gauge, etc. A capacitor basically consists of two conductors (plates) separated by a dielectric insulator. The mechanical device converts the physical quantity to be measured into a mechanical signal. The transducer is a sensor-connected system to transform the quantity measured into a regular electrical signal such as 0-10V DC, -10 to+ 10V DC, 4 to 20mA, 0 to 20mA, 0-25mA etc. Classification of Transducer 3. In other words, if exactly the same value were measured a number of times, an ideal sensor would output exactly the same value every time. CLASSIFICATION OF TRANSDUCERS According to Transduction Principle INDUCTIVE TRANSDUCER: •In inductive transduction, the measurand is converted into a change in the self inductance of a single coil. A DC power supply or an audio frequency generator is used as an external power source. Few types are discussed in this article. This website uses cookies to improve your experience. Transducers may be classified according to their application, method of energy conversion, nature of output signal, etc. This conver sion can be direct or it may r equire transducers. Transducer is a device which converts one form of energy into another form i.e,. The sensors require external power called excitation signal. Classification of Transducers Transducers may be classified according to their application, method of energy conversion, nature of output signal, etc. Usually a transducer converts a signal in one form of energy to a signal in another.. Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc. Electrical Transducers 5. The smallest difference between measured values that can be discriminated. For example, for a transducer used for temperature measurement, sensitivity will be expressed in mV/’ C. A high sensitivity is always desirable for a given transducer. Accept Read More, Sensors-based on Contact and Non-Contact type, Based on the Physical Parameter being measured, 4-20 mA Transmitter Wiring Types : 2-Wire, 3-Wire, 4-Wire, Loop Check of 4-20mA or HART Transmitters. This specification is the smallest detectable incremental change of the input parameter that can be detected in the output signal. The active transducers further classified as. A change in the capacitor takes place either by changing the distance between two plates or by a change in the dielectric. Some transducers contain the mechanical as well as electrical devices. The operating range of the transducer may be a decisiv… Classification of Transducers Passive Transducers. Inductive Induction: In inductive induction, the measurend is converted into a change in the self inductance of a single coil. 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