Transducers Types of transducers (Active and Passive) Resistive Transducers Definition Working Principle Types Advantages and disadvantages Applications Capacitive transducers Definition Working principle Types Advantages and disadvantages Applications. Thermometer,Thermocuople, bourdon tubes, ... other form. Capacitance, C is inversely proportional to the distance between two plates, $d$. Advantages of Electrical Transducers . But to measure all these forces, a device is necessary which can change the physical quantities into easily assessable energy. The transduction element of capacitive transducer is a capacitor which may be a parallel plate, cylindrical or angular capacitor. The power requirement of transducer is very small. So, when you see a buzzer specification, if the voltage shows Vp-p, you can be sure that this is a passive buzzer. The resistance value depends on the three parameters $\rho, l$ & $A$. So, we can make the inductive transducers based on the variation in one of the three parameters $N,S$ & $\mu$. e.g. It is a passive transducer which required external source of supply to function. It consumes less energy (0.8W to 1.0W) compare to microwave sensor. Thermistor, strain gauges, LVDT etc . On the basis of transduction principle used. We will consider the passive elements like resistor, inductor and capacitor. passive transducer is a transducer, which produces the variation in passive element. Similarly, as length of conductor, $l$ decreases the value of resistance, R also decreases. Thermocouple, Photovoltaic cell and more are the best examples of the transducers. A passive transducer is said to be a capacitive transducer, when it produces the variation (change) in capacitance value. It requires external power source for its functioning. IV. Inductance, L is directly proportional to permeability of core, $\mu$. As these transducers play a key role while changing the energy from one form to another form. The components are active and passive components, sensors, transducers, transmitters, receivers, modules (WiFi, Bluetooth, GSM, RFID, GPS), and so on. These devices play an essential role in fields like control engineering, instrumentation, etc. The advantage of Thermistor transducer is that it will produce a fast and stable response. 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. the following formula for reluctance, S of coil. - Structure & Tuning Methods. The best examples of this transducer mainly include a differential transformer, resistance strain, etc. So, as cross sectional area of the conductor, $A$ increases the value of resistance, R decreases. The capacitive transducer is very sensitive. We will consider the passive elements like resistor, inductor and capacitor. Inductance, L is directly proportional to square of the number of turns of coil. Passive transducers. Hence, we will get the following three passive transducers depending on the passive element that we choose. Primary and secondary transducer V. Transducers and inverse transducers. Advantages of Electrical transducers Mostly quantities to be measured are non-electrical such as temperature, pressure, displacement, humidity, fluid flow, speed etc., but these quantities cannot be measured directly. It requires an external force for operation and hence very useful for small systems. Passive transducer passes loss. Resistance, R is directly proportional to the resistivity of conductor, $\rho$. Because, the variation in any one of those three parameters changes the inductance value. Slide-wire resistor . Table 1: A comparison of sensor types. Electrical signal obtained from electrical transducer can be easily processed (mainly amplified) and brought to a level suitable for output device which may be an indicator or recorder. The variation in any one of those three parameters changes the resistance value. 2. The following are the major advantages of capacitive transducers. Definition: Capacitive Transducer is a device which changes its capacitance with change in the physical phenomena to be measured. Passive sensor elements can operate over large temperature ranges. 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. Similarly, as cross sectional area of the conductor, $A$ decreases the value of resistance, R increases. 0 like 0 dislike. It is a low power-consuming device. 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. The electrical system can be controlled with a small level of power. So, as distance between two plates, $d$ increases the value of capacitance, C decreases. $A$ is the area of magnetic circuit through which flux flows, $$L=\frac{N^{2}}{\left (\frac{l}{\mu A} \right )}$$, $\Rightarrow L=\frac{N^{2}\mu A}{l}$Equation 3. Inductive transducers may be of passive-type or self-generating type. In a potentiometer, an electrically conductive wiper slides across a fixed resistive element. IC sensors offer good performance and value over a more limited range. Passive Sensors do not control electricity directly and do not require external power sources to accomplish control of an electrical signal. Similarly, as resistivity of conductor, $\rho$ decreases the value of resistance, R also decreases. It provides some change within passive electrical amount like resistance, capacitance, and inductance based on the simulation result. passive transducer is a transducer, which produces the variation in passive element. Thus this is all about an overview of what is an active and passive transducer, and differences between them. III. 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