Question

Compare and contrast the use of an LVDT and a resistance-based potentiometer for position measurement.

Compare and contrast the use of an LVDT and a resistance-based potentiometer for position measurement.

Homework Answers

Answer #1

1. cost:

Potentiometer--Low   and LVDT ----Moderate to High

2. Function

Potentiometer--Can be trimmed to specific functions

LVDT ----Can be wound into unit, limited to variation in turns

3. Power Loss Recovery:

Potentiometer--Position recovery is simple; units power up at previous voltage

LVDT ----Position recovery is simple; units power up at previous voltage

4. Resolution:

Potentiometer--Infinite

LVDT ----Infinite
(limited by noise in the LVDT signal conditioner)

5. Life:

Potentiometer--> 5 million cycles

LVDT ---->10 million cycles

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