This document is a test paper containing multiple questions related to transducers. It includes 3 questions: 1. Asks to discuss the difference between high reproducibility and repeatability results. 2. Asks to classify transducers based on energy conversion into modifiers, modulators and self-generators and provide one example of each. 3. Has three parts: a) asks to calculate voltage outputs of a linear variable differential transformer (LVDT) in different positions, b) asks to explain the major difference between a differential variable reluctance transducer (DVRT) and LVDT, c) asks to state advantages and disadvantages of using an LVDT for linear displacement measurement.

1. Faculty of Electrical Engineering
Universiti Teknologi Malaysia
@UTM
Gtry uMvERsm rENHoLocr uaLAYslA
SEI 4153
TEST 1 (10 %)
81310 UTM Skudai, Johor RESEARCH UNIVERSITY l't November 2011
ANSWER ALL QUESTIONS.
l. Please discuss the meaning and the difference between a high REPRODUCIBILITY results and a
high REPEATABILITY results. (4 Marks) q
2. Explain how transducers can be classified on the basis of energy conversion into modifiers,
modulators and self-generators. Provide ONE example for each classification. (6 Marks)
J. Linear variable differential transformer (LVDT) is normally used to measured small linear
displacement of many industry applications.
A cross section of a balance LVDT is shown in Fig. 1. The maximum voltage output, Vour is 80%
of the input voltag€, Vn. Find V6glwhen the core of the LVDT is in the middle position r:0,
fully move to the LEFT and fully move to the RIGHT. (6 Marks)
.r+ 0
Fig l. Cross section view of LVDT
b. Differential variable reluctance transducer (DVRT) is another inductive transducer used for micro
range linear displacement measurement. Please explain what is the major difference between
gytr *d.LVDr? (7 Marks)
t^d.ohvO
c. Please state the advantages and disadvantages of an LVDT used for linear displacement
measurement. (4 Marks)
201U20t2 -l Prof. Dr. Ruzairi AbdulRahim
Dr. Leow Pei Ling