Transcript Buffer for Cryogenics Project

By:
Tyler Axdorff
Electrical Engineering
• Electrical Engineering is the study of
electricity, electronics, and electromagnetism.
•The main body of work that I have done would
be dealing with electronics.
•Electronics can vary from small complex
electronic circuits, to very large super
computers.
• Electronics has had a huge impact on the
world, the way we communicate, store
information, transmit data, and much more.
Cryogenics Project
• The goal of the project is to study the flow of combined
liquids and gases at very low temperatures. For example
using liquid hydrogen for fuel in a vehicle.
This is the new cryostat it was created
in 2006 by Bobby Brown.
These are the old projects parts. As the
team decided to expand the project it
was evident that we needed to build a
new current source, buffer, and cryostat.
Where The Buffer Fits In The Big
Picture
Current Source
Buffer
It gives the signal from the sensor
a higher current so the computer can
capture the data.
Sensor
Board Design
• One of the steps in building the board, is trying to design a
system that fits on a standard purchasable board.
After a few revisions I ended up
with a board with a much neater
layout
My initial idea, notice the I/O’s
going in all different directions.
The Final Product
• The Buffer is completed, a enclosure must be designed to
encompass a modified power supply and house the
connectors to the sensors.
Circuit Schematic (1 channel)
Completed circuit after
assembly.
Test Results/Conclusions
Channel
Voltage In
AC
DC
Voltage Out Voltage Offset
Voltage In
Voltage Out Voltage Offset
1 71.08mV 71.09mV
2 72.29mV 72.29mV
.01mV
2.0793V 2.0806V .0013V
.00mV
2.0894V 2.0911V .0017V
69.21mV 69.21mV
.00mV
2.0895V 2.0911V .0016V
4 75.25mV 75.26mV
5 77.55mV 77.57mV
.01mV
2.1046V 2.1060V .0014V
.02mV
2.1044V 2.1059V .0015V
72.15mV 72.15mV
.00mV
2.0946V 2.0970V .0024V
7 76.54mV 76.54mV
.00mV
2.0644V 2.0652V .0008V
73.21mV 73.22mV
.01mV
2.0680V 2.0700V .0020V
3
6
8
Conclusion: Buffer works as intended
Design requirements fulfilled, the DC offset is less than 2mV.
Acknowledgements
• Faculty Advisor: Dr. John Krupczak
• Hope Engineering Department
• Summer Research Staff
• NSF