Team 181 www.transtekinc.com Team: Ryan Williams (EE) Jonathan - - PowerPoint PPT Presentation

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Jul 27, 2023 206 likes •488 views

Senior Design Team 181 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 LVDT Background

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Senior Design Team 181

www.transtekinc.com

SLIDE 2

Team:

Ryan Williams (EE)
Jonathan Wolff (EE)
Damon Soto (EE)
Jason Meyer (EE)

Advisor: Helena Silva (ECE) Trans-Tek Contacts:

Mark Bennett
Jeffrey Gladu

SLIDE 3

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

SLIDE 4

Consists of a 3-part transformer
Secondary coils wired in

subtractive configuration

Position of core determines
utput voltage
Linear relationship between core

position and output voltage

http://upload.wikimedia.org/wikipedia/commons/0/07/Lvdt_how.gif

SLIDE 5

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

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The LVDT housing will be extended to contain the circuitry. LVDT components:

1. Stainless SteelTubing/housing (top)
2. LVDT pushrod (bottom left)
3. Core (bottom right)
4. LVDT Windings (middle)

SLIDE 7

www.transtekinc.com

SLIDE 8

www.transtekinc.com

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Second part is the oscillator itself.
Hardware circuit that converts a DC

signal to an AC signal.

Frequency of the oscillator is

determined by a RC combination, looking for a range of 1.5 to 12.5 kHz.

Output voltage should be 1 VRMS.
Need to make an oscillator with

almost no harmonic distortion.

http://www.electronics-tutorials.ws/oscillator/osc22.gif

SLIDE 11

Third subpart is the amplifier.
Will take the output signal of the Oscillator portion and amplify the

wave form.

Output voltage determined by a resistor, looking for 1 to 6 VRMS.

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Reference Signal LVDT Output

Microcontroller

Readout Device DC Offset Remove DC Offset

SLIDE 18

Receive reference &

utput signals

ADC Determine amplitude ratio Output DC signal (with

ffset)

Calculate corresponding DC ouput Identify phase shift

SLIDE 19

SLIDE 20

RIGID

Cheaper
More reliable
Thickness can vary

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Notice the small dimensions of the aluminum tubing. The extra space a flexible PCB would give is so small it is negligible. LVDT – Linear Variable Differential Transformer

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