LVDT is used to measure

SOLUTION

Linear Variable Differential Transformer:

• Linear variable differential transformers (LVDT) are used to measure displacement.
• LVDTs operate on the principle of a transformer.
• As shown in the figure, an LVDT consists of a coil assembly and a core.
• The coil assembly is typically mounted to a stationary form, while the core is secured to the object whose position is being measured.
• The coil assembly consists of three coils of wire wound on the hollow form.
• A core of permeable material can slide freely through the center of the form.
• The inner coil is the primary, which is excited by an AC source as shown.
• Magnetic flux produced by the primary is coupled to the two secondary coils, inducing an AC voltage in each coil.