Construction of Low Cost Linear Variable Differential Transformer and its Calibration

Abstract

This paper describes about the construction of Low Cost Linear Variable Differential
Transformer (LVDT) sensor and its calibration. The probe of iron core of the constructed
LVDT is 4.5 inch long and 0.5 inch diameter while the iron core is 8 inch length and 1 inch
in diameter. The performance of LVDT had conducted by measuring the voltage 6.35 V with
the help of 1 cm known surface displacement. The constant of the known surface
displacement from this is used to measure the unknown surface waviness in accordance with
voltage. The performance accuracy of this sensor varies from 97.6% to 99.96%. The cost of
the constructed LVDT is about $28 which is very low as compared to available market
sensor.