<< Chapter < Page Chapter >> Page >

20. For both output terminals on the Tone Measurements icon, right click and select Create>>Numeric Indicator to create Front Panel displays of theseparameters.

21. Your block diagram should now be similar to Figure 9.

22. There are several Express VIs in the Signal Analysis palette that are similar to the Tone Express VI.These other Express VIs display information regarding frequency content, DC offset, curve fitting, etc. Depending on time, you maywant to experiment with these other functions.

Block Diagram with Measurements SubVI

3.4 displaying data on-screen

One of the strengths of LabVIEW is the ease with which user interfaces are developed. In this section we willdevelop an on-screen graph display.

23. Right-click on the wire between the DAQ Assistant and the Tone Measurements icons. SelectCreate>>Graph Indicator.

24. Display the Front Panel by pressing<Ctrl-E>. You should see that a graph has been created on the Front Panel.

Block Diagram with Graph Added

3.5 writing data to a file

Now that the VI can acquire data, we will develop a means to write the data to an Excel file and display thedata onscreen. We will use the“Write to Measurement File”Express VI.

25. Right click on the Block Diagram to bring up the Functions Palette.

26. If you can’t find the“Write to Measurement File”Express VI, click on the search button at the top of the Functions Palette. Type“write to file”and double click the choice that ends in<<file I/O>>. The search menu will change into the Functions Palette, and the“Write to Measurement File”Express VI will be highlighted. Place this Express VI on the block diagram.

Write to Measurement File Configuration Window

27. Configure the window as shown in Figure 11. Configure the File Name window to contain thepath to wherever you wish to store your data. Change the Segment Headers to OneHeader Only and the X Value Columns to One Column Only. Click OK.

28. Place your cursor over the data output terminal on the DAQ assistant icon. The cursor should change to awire spool. Click on the data terminal and connect the wire to the signals inputterminal on the Write to File icon.

29. Right click the File Name terminal input on the Write to File icon. Select Create>>Control. This creates a field on the Front Panel where the user can enter thename of the data file that will be created.

30. Create a write disable button by right-clicking on the front panel. Click Boolean>>Push Button. Type“Store Data”to change the name of the control.

31. On the block diagram, connect the push button to the Enable terminal on the Write to File icon. (When thiscontrol is enabled, the program will write data to the file-path indicated on the Front Panel.)

32. Your Block Diagram should now be similar to Figure 12.

Block Diagram

3.6 running the vi

33. On the Front Panel, click the Run button. You should see the signal from the function generator displayed onthe graph.

34. When you enable data storage, a .lvm file should will be created in your folder. On the Windows desktop, openyour group’s folder. Right click on the .lvm file that you just made and select Open With>>Microsoft Office Excel.

35. Plot the data and compare it to the graph shown on the front panel. You may want save screen shots or makehard-copies of any plots to include in your lab book.

Part 4: shutting down

After you have saved any data you want to keep, close all programs and log off of the computer. Turn off theCompactDAQ chassis, the function generator, and the oscilloscope. Take time to clean up your work area. Ten percent of your lab bookgrade will be based on cleanliness.

Lab report

You are to submit a one-page memo report describing what you learned from the lab. See the Lab 1 WritingAssignment handout for more details.

Questions & Answers

How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Introduction to mechanical measurements. OpenStax CNX. Oct 18, 2006 Download for free at http://cnx.org/content/col10385/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Introduction to mechanical measurements' conversation and receive update notifications?

Ask