MECHANICAL POLYTECHNIC

All Mechanical Subject study,notes,Syllabus,Sample Question Papers,Previous Question Papers,Circulars,jobs,News,

  • Home
  • SYLLABUS
    • G Scheme
    • I Scheme
  • Previous Question Paper
    • G Scheme
    • E Scheme
  • MSBTE model answer paper
  • MSBTE Sample question Paper
  • Question Banks
  • About Admission Procedure
  • Important student notice
  • Important faculty Notice
  • Home
  • Basic
    • Physics
    • Chemistry
    • Basic Communiction
  • Design
    • Applied Mechanics
    • Strength of Material
    • Theory Of Machine
  • Thermal
    • IC engine
    • Power Engineering
    • Measurement And Control
    • Thermal Engineering
  • video and ppt links
  • list of mechanical polytechnics
  • Polytechnic Faculty Jobs
  • Faculty Formats
  • Online Exam MCQ
    • Management
    • EST
  • Students job Advertisement

Linear variable displacement transformer

 Add comments about this   

The term “LVDT” are known as “linear Variable Displacement Transformer”. This is a common type   of electromechanical transducer. It converts the rectilinear motion of an object couples as in mechanical linkages into signals.
PRINCIPLE:-
                           LVDT is a popular transducer which is based on a “variable inductance principle” for displacement measurement. It is based on changing the intensity of signal.
CONSTRUCTION:-
  In this three coils are arranged as shown in fig. (a) Between which magnetic core are moves freely. The construction of LVDT is as shown in fig. (b) The central coil (primary) energized from an external AC supply & the two end coils (secondary) are pick up coils. The core passing through the primary and & secondary coils.  


   
 WORKING:-         
                           In operation an AC input is impressed on the primary coil, and an AC output voltage, depending on magnetic coupling between the core and the coils, is obtained at the secondary coils.
                           The magnetic coupling, hence the output depends upon the position of the core. usually a linear range is specified for a differential transformer , and when the core is operated within this range ,it is called “linear variable displacement transformer” (LVDT)
  Theoretically, there should be a core position for which the voltage induced in the secondary coils will be the same as that of the input and resulting output should be zero. This position is called as null position and is difficult to obtain in practice.
                       The difference of the two voltages across the output terminals of (LVDT) gives a measure of the physical position of the center core. By comparing the magnitude and the phase of output voltage, the amount and direction of the moment of core can be determined

Advantages of LVDT:-
1.      It serves as primary detector transducers, it converts mechanical displacement into proportional electrical voltage without the assistance of any elastic number.
2.      It cannot be overloaded, since the core is completely separable from the device.
3.      It is insensitive to temperature changes.
4.      It gives high output without any intermediate amplification.
5.      It is an economical device.

Disadvantages of LVDT:-
1.        When used with strain gauge, the core is appreciable mass,compared to the bonded strain gauge.
2.        It is designed for specific input frequency.
3.        The device becomes complicated, is the direction of null is also required.

 Application:-
1.        It is used as transduction element.
2.        It is used in CNG machine for displacement measurement
3.        In creep testing machine, it is used for deflection measurement.
4.      It is used for different measurements like pressure, force, thickness, etc.also in the control system.  
 
  • Share This:  
  •  Facebook
  •  Twitter
  •  Google+
  •  Stumble
  •  Digg

Related Posts:

  • Humidity Measuremeter Humidity contain of water vapour in air or other gas. Water vapour is the gaseous form of water, and can be thought of much like any other kind of ga… Read More
  • Optical Pyrometer Optical Pyrometer is a highly-developed and well accepted non-contact type temperature measurement device. The principle of temperature measurement … Read More
  • THERMISTOR Thermistor are a temperature measurement device that has a negative temperature coefficient. As the temperature increases the resistance decreases an… Read More
  • Linear Potentiometer A linear potentiometer transducer consists of a potentiometer, which is short circuited by a slider. The other end of the slider is connected to a s… Read More
  • Linear variable displacement transformer The term “LVDT” are known as “linear Variable Displacement Transformer”. This is a common type   of electromechanical transducer. It conve… Read More
Newer Post Older Post Home

0 comments:

Post a Comment

This website is copyrighted.

Breaking News

we will come soon site is under construction thank you

Popular Posts

  • MSBTE Academic Monitoring D Forms
    D1            D11 D2            D12 D3            D13 D4            D14 D5            D 15 D6            D16 D7            D1...
  • MSBTE Model Answer Paper
    I Scheme Syllabus First sem Second Sem Third Sem Fourth Sem Fifth sem Sixth Sem Basic Mathematics Applied Science SOM ................
  • List Of Polytechnic Colleges in Maharashatra
    Pune region Polytechnic Colleges Government Polytechnic Pune     Babasaheb Phadtare Polytechnic Bharati Vidyapeeth’s ...

Recent Posts

Unordered List

Pages

  • Home

Text Widget

Blog Archive

  • July 2018 (49)
  • June 2018 (6)
Powered by Blogger.

Report Abuse

Contact Form

Name

Email *

Message *

Search This Blog

Subscribe

Recent Posts

Recent Posts

Text Widget

Sports

Advertise Here

Services

Vision

We Try to simplify the complex things in to the simple manner on the level of Students Grasping Capacity.Our Main Aim to create the strong and Competent Successful Mechanical Engineers

Copyright © 2025 MECHANICAL POLYTECHNIC | Powered by S.M
Design by Mechanical Polytechnic | Blogger Theme by Mechanical Polytechnic | Distributed By Website Team