1. LabVIEW For BIOEN 201 Fritz Reitz, Ph.D.

2. Why talk about LabVIEW BIOEN 301 labs use it, so it helps to be a little familiar with what it is it’s a VERY useful tool, especially in science and engineering lots of labs on campus use it, and if you use it, they’ll use you.ppt file of this presentation available at http://staff.washington.edu/freitz/BIOEN201

3. Today’s agenda: “Virtual instruments” Defining “LabVIEW”, software for making virtual instruments Demonstrations

4. Real vs. virtual instruments, part 1 of 3 Fritz’s BIOEN 436 final project experience – EEs vs. biologists

5. Real vs. virtual instruments, part 2 of 3 Why the biologists won - two ways to make a black box that inverts a sinewave; chips vs. bits

6. Real vs. virtual instruments, part 3 of 3 Real-life case study – The Head Turn system – Rat’s nest of circuitry vs. e-mailable program

7. What’s LabVIEW? (part 1 of 3) technically, it’s a software development environment with its own programming language called “G” it makes it easy to build a graphical user interface that you add G code to to make it functional resulting programs can be run by anyone who downloads the engine, like Java needs a JVM so it’s a general utility programming environment

8. What’s LabVIEW? (part 2 of 3) LabVIEW is made by National Instruments, who make A/D cards and are hip to engineering needs, so... Modules for most data acquisition and processing functions are already there, so... “Writing” programs that act like instruments fr can be mostly done by linking modules so it’s a way to build virtual instruments FAST

9. What’s LabVIEW? (part 3 of 3) G is a graphical language, so programs look like flowcharts program modules are clicked and dragged into place modules are “wired” together, and data flows through these “wires” huh?

10. LabVIEW demo: Dial and meter

11. LabVIEW demo: For Loop and graph

12. LabVIEW demo: Simple data acquisition

13. LabVIEW demo: Data acquisition with template

14. more LabVIEW demos / questions:

15. Conclusion Virtual instrumentation can save you and your lab a LOT of time and trouble LabVIEW is a way to produce almost any program fast, but particularly virtual instruments now you’ll know which arrow to click in 301 to make the labs work.ppt file of this presentation and VIs available at http://staff.washington.edu/freitz/BIOEN201

16. Appendix: Flash A/D conversion signal is compared to many standards resulting high/low signals give binary representation of input more bits gives more precision