Sample LabVIEW Programs

Overview

I have used LabVIEW to solve simple homework problems, interface and control lab apparatus, to the creation of multi-stage analysis program suites.  I have significant expertiese in the areas of:

• DAQ - using NI DAQ baords, NI SCXI, Agilent, LabJACK, and Field Point equipment
• File IO and String parsing - through translation program work
• User Interface Development - specifically mouse driven interfaces and efficeint data input and display
• Image Processing - using the IMAQ toolbox and custom ground up written algorithms
• Advanced Plotting - three dimensional plotting using OpenGL and custom ground up written algorithms
• Low Level Processing - importing and reading files at the byte level
• Controls - motor, actuator and other device controls using PID and other algorithms
• Internet - web page publishing, remote control and file FTP integration into analysis VIs
• Recursive Functions - use of recursion for seraching and other algorithms
  

I also have experience teaching LabVIEW, when I worked as a Laboratory Teaching Assistant during my senoir year as an undergraduate.  I was responsible for teaching all undergraduate LabVIEW DAQ Laboratory courses.

Sample Programs

The programs I present here are a simple DAQ program, an advanced custom 3D plotting program, and a stress analysis program using Mohr's Circle.  I have included the VIs to be downloaded as .llb's requiring LabVIEW 7.0.

• Simple DAQ Counter
  
• 3D Ellipsoid Projector
  
• Mohr's Circle

Simple DAQ Counter

This is a simple DAQ program I wrote for a Human Factors professor investigating the effect of varous surgical instrument handles on operator performance.  The experiment called for touching several contact points with a surgical tool, using an endoscope to view the experiemnt.  My job was to instrument and program the system to record the times between and during contact with the points, and to account for operator error.  The program front panel and block diagrams are listed below.  To view images click the links.  The source code is not included as it was specific to the DAQ equipment employed in the apparatus.

• Front Panel
• Block Diagram

3D Ellipsoid Projector

This program was written as part of a complete overhaul to an analysis suite I wrote as a senior undergraduate.  There was a need to display a three dimensional sample with data points on it.  However, there was limited access to MATLAB to use its 3D plotting capabilites, and hence I wrote a complete shaded wireframe with hidden line removal engine for displaying 3D facet data.  I further enhanced the program with a mouse driven interface.The program front panel and block diagrams and source code are listed below.  The block diagram of this VI is misleading in its simplicity, as the core functionality is within the subVIs.  To view the complete program download the source code.  To view images or download the files click the links.

• Front Panel
• Block Diagram
• Source Code

Mohr's Circle

This was a fun program I wrote as a sophmore undergraduate.  I was tired of computing and hand drawing Mohr's Circle homework problems for stress analysis.  I then wrote this program to perform there operations and gained my first experience using LabVIEWs graphical display capabilities.

• Front Panel
• Block Diagram
• Source Code