Senior Design Team 181

Oscillator/Demodulator to Fit on Flexible PCB

www.transtekinc.com

Team:• Ryan Williams (EE)• Jonathan Wolff (EE)• Damon Soto (EE)• Jason Meyer (EE)

Advisor: Helena Silva (ECE)

Trans-Tek Contacts:• Mark Bennett• Jeffrey Gladu

(Re)Introduction

• LVDT Background• Current Oscillator/Demodulator Model• Design Alternatives – Oscillator• Design Alternatives – Demodulator• Final Design• Goals• Progress• Timeline• Budget

Outline

• Consists of a 3-part transformer

• Secondary coils wired in subtractive configuration

• Position of core determines output voltage

• Linear relationship between core position and output voltage http://upload.wikimedia.org/wikipedia/commons/0/07/

Lvdt_how.gif

LVDTs

LVDTs

http://www.singer-instruments.com/sites/default/files/images/tutorials/how_lvdt_works_fig3.gif

LVDT Basics

The LVDT housing will be extended to contain the circuitry.

LVDT components:1. Stainless Steel Tubing/housing

(top)2. LVDT pushrod (bottom left)3. Core (bottom right)4. LVDT Windings (middle)