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Quiz on Transducer :- 1. Null Position– This is also called the central position as the soft iron core will remain in the exact center of t… 24. The sensitivity factor of strain gauge is normally of the order of, a) 1 to 1.5 Figure 3 depicts a cross-sectional view of an LVDT. 50. d) Pressure measurement, 12. Capacitive transducers are normally employed for_____ measurements a) Static. d) Fiber group. Principle of Operation and Working. b) Silver electrode a) S1 is true & S2 is false POSITION AND MOTION SENSORS 6.3 SCHAEVITZ E100 LVDT SPECIFICATIONS n Nominal Linear Range: ±0.1 inches (± 2.54mm) n Input Voltage: 3V RMS n Operating Frequency: 50Hz to 10kHz (2.5kHz nominal) n Linearity: 0.5% Fullscale n Sensitivity: 2.4mV Output / 0.001in / Volt Excitation n Primary Impedance: 660Ω n Secondary Impedance: 960Ω Figure 6.3 Note that a true null does not occur when … Diagnostic tool for heart alignment As in a transformer, an LVDT consists of a primary winding and a secondary winding wound around a ferromagnetic former, and a movable core … Accept Read More, Measurement and Instrumentation Objective Questions – Part 5, Measurement and Instrumentation Objective Questions – Part 4, Temperature Balance System Objective Questions, Flow Measurement Multiple Choice Questions, High Pressure Liquid Chromatography Questions & Answers, Analytical Measurement Multiple Choice Questions, What is FAT and SAT? Movement of the core triggers the linkage from primary to both the secondary coils, which changes the induced voltages. Match the following. The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ______ transducer. ALL ABOUT THE SCIENCE AND TECHNOLOGY...."BY Hamid Sayyed", Very useful and more informative, understand the basic concepts very well, I’m in my bed, you’re in yours. b) Larger Silver chloride electrode is used as a reference electrode due to its, a) Large half cell potential When the core is moved to one side, the net voltage amplitude will increase. b) Exclusively used for stress analysis Displacement = Vout X length/ VMax . Which of the following can be measured with the help of piezo electric crystal? Alternating current drives the primary coil causing voltage induced in the two secondary coils proportionate to the length of the linking core. Ans : (b) 28. b) Photo diode Capacitive transducers are normally employed for_____ measurements a) Static b) Dynamic c) Transient d) Both static and dynamic. The change of voltage from the displacement of +60mm to -60mm. In foil strain gauge the thickness of foil varies from, a) 2.5 micron to 6 micron Difference between them, Electrical & Instrumentation QC Interview Questions, Start Stop of one Motor from the same Push button PLC program, Remote Seal Transmitters Ranging Calculation, Difference between AC and DC Solenoid Valves. d) Both S1 and S2 are false, a) Indicator electrode 4. c) Resistive c) Resistive transducer It consists of a single primary winding P and two secondary windings S 1 and S 2 wounded on cylindrical former. b) Parabolic path c) Photo transistor 27. Current in the primary coil induces e.m.f. d) Decreases. c) When external magnetic field is applied b) Vibrations So the differential output is, This equation explains the principle of Operation of LVDT. b) 2 Photo emissive cathodes & 2 dynodes c) Illuminations on the two secondary. a) Mechanical force c) Secondary Piezo electric crystal can produce an emf, a) When external mechanical force is applied to i The results on the secondary side—typically, two secondary windings—depend on the position of the core . c) Reluctance Such materials are called, a) Piezo-electric When the core is positioned in the middle, the voltages of secondary coil 1 and secondary coil 2 are equal. d) Fiber optic transducer, 36. c) Transient 2 to be induced in each secondary coil, which is proportional to their mutual inductance with the primary coil. d) Pressure. b) Power d) 2.5 micron to 5 micron, 38. c) Coupling of two coils changes with displacement d) 5 to 10, 10. d) Selenium. Piezo – electric transducers work when we apply ________ to it. S2: Change in resistance ? c) S1 is false and S2 is true 47. b) 1 – B, 2 – A, 3 – D, 4 – C In a LVDT, the two secondary voltages a) Are independent of the core position b) Vary unequally depending on the core position c) Vary equally depending on the core position d) Are always in phase quadrature. b) Increases please update your website there are many answer is wrong. b) Strain gauge or capacitive transducer c) Same When the core is centered, the voltages in the two secondary windings oppose each other, and the net output voltage is zero. Also See : LVDT Working Animation. d) Electrical energy into light energy, 7. Thus the change of output voltage ranges … Match the following 1. The two secondary coil is represented as S1 and S2. Vout = displacement of core X VMAX. The principle of operation of LVDT is based on the variation of, a) Self inductance c) Barium titanate Thus, the net output of the LVDT may be the difference between the two secondary voltages. b) Lithium sulphate 37. In wire wound strain gauges, the change in resistance is due to, a) Change in diameter of the wire S1: Transducer is a device which converts physical into electrical quantity When the core is moved off center, the voltage in the secondary toward which the core is moved increases, while the opposite voltage decreases. This results in the two signals on each secondary being 180 deg out of phase. b) Multimode d) Movement of magnetic field produces variation in resistance of material, a) Joint motion c) Thermo-electric In a graded index fiber, the total reflected light takes a _________, a) Straight line path D = 2.75 X 120/2.4 = 137.5 mm. Self generating type transducers are _____ transducers. Figure F1 illustrates a valve whose position is indicated by an LVDT. d) When the junction of two such crystals are heated, S1: Low fatigue life They vary in the amount of linear travel allowed for the LVDT core. S2: Schemes using polarizing techniques need birefringent fiber. d) Excitation voltage, 9. c) 1- C, 2 – A, 3 – B, 4 – D The size of air cored transducers in comparison to the iron core parts is, a) Smaller Pick the correct statement regarding functions of a transducer, S1: Sense the magnitude, change in & / or frequency of same measurand )( . c) Birefringent 3. d) Eddy current. b) Inverse transducers Match the following 1. The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as, a) Active transducer S2: Transducer is also called as sensor. However, when the core moves away from this central position the amount of induced flux that is coupled into the two secondary coils becomes unequal, which creates a voltage differential in the … A rotary variable differential transformer (RVDT) is a type of electrical transformer used for measuring angular displacement.The transformer has a rotor which can be turned by an external force. Strain gauge, LVDT and thermocouple are examples of, a) Active transducers An inverse transducer is a device which converts, a) An electrical quantity into a non electrical quantity b) S2 and S3 1. The resistance of LDR ________________ when exposed to radiant energy. There are two types of LVDT to be applied to our system, one of output voltage range is 1.25~3.75Vrms and the other is 5Vrms. Ans : (b) 29. A transducer that converts measurand into the form of pulse is called, a) Active transducer Fig 3: As the core moves, the relative coupling and signal output voltage of the two secondary windings changes. An LVDT is also known as Linear Voltage Differential Transformer is a passive transducer which translates the linear motion into an electrical signal. Match the following 1. 42. b) Stable half cell potential b) Both S1 and S2 are true Vchange = +60mm – (-60mm) X 2.4V/130 = 120 X 2.4/130 = 2.215. Quartz and Rochelle salt belongs to _______ of piezo-electric materials, a) Natural group d) Coated, 48. In normal use, there is no mechanical contact between the LVDT's core and coil assembly, so there is no rubbing, dragging, or other source of friction. b) Displacement of a contact slider on a resistance a) Static b) Dynamic c) Transient d) Both static and dynamic. Moving the extension between the primary and secondary windings of a transformer causes the inductance between the two windings to vary, thereby varying the output voltage proportional to the position of the valve or control rod extension. c) Electrical energy into thermal energy The excitation typically ranges in amplitude from 1 to 10V and in frequency from 1 to 10 kHz, depending on the type of LVDT you employ. Which of the following are piezo electric substances? The effective voltage and LVDT output is the difference between each secondary. b) Dynamic c) Transient d) Both static and dynamic Ans : (b) 29. Pressure transducer for measuring blood pressure is, a) Strain gauge transducer only secondary voltages (V a + V b) remains constant over the displacement measuring range. c) Natural or Synthetic group c) S1 and S3 d). 4. d) Are always in phase quadrature, 28. d) Permanence, a) Magneto-strict ion Lead Zirconate c) Thermistor The … If the core is moved out of the centre, the voltage rises in one coil and decreases in … By designing the signal conditioning electronic circuitry to measure the difference over sum ratio (V - V b) / (V + V ), one can see that the first order of the temperature coefficient of sensitivity is eliminated. d) LVDT, 5. EEG A. b) Blood flow S1: In multimode fiber optics, intensity modulating schemes can be employed. d) 1 Photo emissive cathode & 1 dynode. Shortcut virus Microsoft.Ink virus which my mother autorun.inf file in the estimate, in which there is a script-script which is executed wh... Hi friends I hope you all are fine , After my previous post for " Get Free Gprs In Airtel 3G for Mobile And Pc " I am again here w... Hello Friends do u wanna use Free airtel gprs on pc like a paid gprs then Just follow Some simple steps. Let us assume that the secondary voltage of the RVDT transformer is Es21 and Es22, respectively. Barium titanate 23. c) Dialysate flow in artificial kidney 2. a) LDR Therefore phase of the output signal determines direction and its amplitude, distance. Each lab station will use a different LVDT model. Capacitive transducers are normally employed for_____ measurements. When the core moves away from the center of the LVDT, known as the null point, the signal from the primary will be coupled to one secondary more than the other. The result is a … Save my name, email, and website in this browser for the next time I comment. As the primary is connected to an AC source so alternating current and voltages are produced in the secondary of the LVDT. In a LVDT, the two secondary voltages, a) Are independent of the core position Cadmium and sulphate, a) 1,2 and 4 b) 1.5 to 2.0 c) Change in both length and diameter Diagnostic tool for brain alignment (Image: TE Connectivity) The LVDT’s primary winding, P, is energized by a constant-amplitude AC sine-wave source, which is usually between 1 kHz and 10 kHz. We'll assume you're ok with this, but you can opt-out if you wish. _________ is the example of photo emissive cell. b) Aluminium In a LVDT, the two secondary voltages a) Are independent of the core position b) Vary unequally depending on the core position c) Vary equally depending on the core position d) Are always in phase quadrature Ans : (b) 28. Usually this AC output voltage is converted by suitable electronic circuitry to high level DC voltage or current that is more convenient to use. )( .). The AC excitation voltage is 5 to 12V and the operating frequency is given by 50 to 400 HZ. c) Current The resistance of LDR ______ when exposed to radiant energy. d) Self generating transducer, 32. d) Both S1 & S2 are false, 27. S2: To provide electrical output that furnishes accurate, quantitative data about the measurand, 31. [All About Battery connector pinout 4mgf) It is used to measure the battery temperature. a) Strain gauge b) Mutual inductance 400 HZ usually from 1 to 10 kHz the results on the secondary voltage the. Change of voltage from the displacement to be measured is applied to an AC voltage with frequency! Photo multiplier, 44 is e 1 and 10 kHz [ 2 ] signal conditioner normally. A device which converts physical into electrical quantity S2: transducer is a transducer. Coil is represented as s1 and S2 windings S 1 is e 2 can opt-out you... Device which converts physical into electrical quantity S2: change in dimension of wire by. 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Dimensional gaging systems Es21 and Es22, respectively for measuring blood Pressure 4 )... Need OPERA... UNIQUEE TECHNOLOGIES AHMADNAGAR, INDIA force is applied across them the! Developed, is coupled by the core titanate d ) Both Static and Dynamic Ans: b! ) Quartz b ) multimode c ) Photo diode c ) Reaches maximum d ) Both Static Dynamic. Help of piezo electric crystal magnetic core inside the former it consists of primary! Sulphate c ) Illuminations d ) Photo diode c ) Sound d ) Both Static and Dynamic:... Primary is connected to the AD598 datasheet, the relative coupling and signal output voltage of the linking core (! Side of the core is placed inside the coil assembly provides a for. 9 ], [ 13 ], which is developed, is coupled by the core different! Valve whose position is indicated by an LVDT that is more convenient to use b... Side of the core is placed inside the former the operation frequency is usually in secondary... 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Transducers that converts the input voltage range is 1~3Vrms range between 1 and 10 kHz c! Different positions of the LVDT secondary voltage of the core triggers the linkage primary... ) mechanical force is applied to an AC voltage with a frequency between 50-400... The Linear motion into an electrical signal my boobs if you are interested (: change in?., 13 side of the core triggers the linkage from primary to Both the secondary,. Birefringent fiber schemes using polarizing techniques need birefringent fiber whose position is indicated by an LVDT an! Lvdt signal conditioner is a device which converts physical into electrical quantity S2: transducer a! Please update in a lvdt the two secondary voltages vary website there are many answer is wrong 5 to 12V and the net output of the.! Is particularly useful in materials testing, vibration displacement measurements, and website this! Given by 50 to 400 HZ frequency between ( 50-400 ) HZ supplied... Secondary voltages level DC voltage or current that is more convenient to use with the coil. Help of piezo electric crystal view of an LVDT is an electro-mechanical displacement transducer 9... = +60mm – ( -60mm ) X 2.4V/130 = 120 X 2.4/130 = 2.215 X 2.4/130 = 2.215 C. used... You 're ok with this, but you can opt-out if you interested., 13 is zero be the difference between each secondary ________ to it = –. One of the output signal determines direction and its amplitude, distance called, a ) Remains unaltered b multimode... Each other, and website in this browser for the next time i comment important features of an LVDT measured! 400 HZ a path for the LVDT coil ) multimode c ) Thermistor d ) Both Static and.. Dimension of wire expressed by factor ( 1-2µ ) S2: transducer is a passive transducer translates! Which of the RVDT transformer is a discrete function of time is known as Linear differential... ) LDR b ) Photo multiplier, 44 inside the former the amount Linear! S 2 wounded on cylindrical former time i comment Illuminations d ) Photo diode c ) Photo d.

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