Embedded Micro Lesson Plan_Instrumentation_IV-I-EEE_2020-21

 

Teacher/Instructor:  Mr.D. Ravi Kiran

Department of Electrical & Electronics Engineering

Assistant Professor of EEE

Lesson Plan for a Day

Term/Semester/Year:  Sem- I- Syllabus 2020 -21

MICRO LESSON PLAN

(ACCORDING TO BLOOMS DIGITAL TAXONOMY)

Programme	B.Tech, Electrical & Electronics Engineering
Semester	IV Year - I Semester
Subject Title	Instrumentation
Subject Code	R164102D
Class Hours	5
Total Hours	70
Credits	3
Max Marks	100
Unit & Title	Unit-II: Transducers
Teaching and Learning Tools	Black Board/ Power Point Presentation/Videos, E-material.

 

Detailed – Lesson 2 Transducers Lesson Objectives:
Factual	Students will be able to learn definitions, advantages and classification of transducer
Conceptual	Students will be able to learn inductive, resistive and capacitive type transducers
Procedural	Students will be able to Analyze strain gauge and gauge factor
Applied	Students will be able to apply the requirement of transducers in industries and process plants

 

 

 

Taxonomy of Objectives:

Taxonomy of Objectives
Knowledge Dimension	The Cognitive Process Dimension
	Remember	Understand	Apply	Analyze	Evaluate	Create
Factual Knowledge	1
Conceptual Knowledge		2, 3
Procedural Knowledge			4
Meta Cognitive Knowledge

 

Prerequisite Knowledge:

Sensors, voltage measurement, digital displays, transducer, energy form conversion.

Micro Lesson Plan: Day-7: Linear Variable Differential Transducer

1.     Pre-task Activity- Introducing the Transducer and LVDT

     In pre-task, I planned to give introduction about the sensors, transducers and recall the basic definitions.

Video Link: https://youtu.be/nSeW3R2hr1A

2.     In-class Activity: LVDT

Fig. 1: LVDT

Fig.2 Practical LVDT Construction

 Fig.3 Key Parts of LVDT

 LVDT is an acronym for Linear Variable Differential Transformer. It is a common type of electromechanical transducer that can convert the rectilinear motion of an object to which it is coupled mechanically into a corresponding electrical signal. The transformer's internal structure consists of a primary winding centered between a pair of identically wound secondary windings, symmetrically spaced about the primary. The coils are wound on a one-piece hollow form of thermally stable glass reinforced polymer, encapsulated against moisture, wrapped in a high permeability magnetic shield, and then secured in cylindrical stainless steel housing.

Fig.4 Illustration of LVDT's core is in different axial positions.

 

The LVDT's primary winding, P, is energized by a constant amplitude AC source. The magnetic flux thus developed is coupled by the core to the adjacent secondary windings, S1 and S2. If the core is located midway between S1 and S2, equal flux is coupled to each secondary so the voltages, E1 and E2, induced in windings S1 and S2 respectively, are equal. At this reference midway core position, known as the null point, the differential voltage output, (E1 - E2), is essentially zero. As shown in Figure 3, if the core is moved closer to S1 than to S2, more flux is coupled to S1 and less to S2, so the induced voltage E1 is increased while E2 is decreased, resulting in the differential voltage (E1 - E2). Conversely, if the core is moved closer to S2, more flux is coupled to S2 and less to S1, so E2 is increased as E1 is decreased, resulting in the differential voltage (E2 - E1).

 

 

3.     Post – task Activity:

In Post task activity revising the class, clarifying the doubts and asking questions to know the response.

 

Que.1 Full form of LVDT is

1. Linear Variable Differential Transducer
2. Line Voltage Differential Transformer
3. Linear Variable Differential Transformer
4. Line Voltage Differential Transducer

 

 

Que.2 Which of the following quantity can be directly measured by LVDT?

1. Displacement
2. Force
3. Pressure
4. Weight

 

Que.3 LVDT is ______ type of transducer.

1. Resistive
2. Capacitive
3. Inductive
4. Optical

 

4.     Discussion

·        Students will be able to remember the operation of LVDT

·        The pre-task activity material will give them a conceptual knowledge about LVDT

 

5.     Summary

v LVDT is an acronym for Linear Variable Differential Transformer. 

v It is a common type of electromechanical transducer that can convert the rectilinear motion of an object to which it is coupled mechanically into a corresponding electrical signal.

v The transformer's internal structure consists of a primary winding centered between a pair of identically wound secondary windings, symmetrically spaced about the primary.

 

6.     References

1.      Electronic Instrumentation–by H.S.Kalsi Tata MCGraw–Hill Edition, 1995.

2.      A course in Electrical and Electronic Measurements and Instrumentation, A.K.Sawhney, Dhanpatrai& Co.

 

Taxonomy of Objectives –Specific Objectives
Knowledge Dimension	The Cognitive Process Dimension
	Remember	Understand	Apply	Analyze	Evaluate	Create
A. Factual Knowledge	SO-1,2	SO,-1,2,3	SO-1,2,3
B. Conceptual Knowledge	SO-1,2	SO-1,2,3	SO-1,2,3
C. Procedural Knowledge	SO,-1,2	SO-1,2,3	SO-1,2,3
D. Meta Cognitive Knowledge