Lab I - ENME 351 Electronics Instrumentation II Lab Manual...

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ENME 351 Electronics & Instrumentation II Lab Manual _________________________________________________________________________________________________ _________________________________________________________________________________ Page 1 of 15 LAB 1: INTRODUCTION TO LABVIEW & TAKING DATA (VOLTAGE FROM A THERMOCOUPLE DUE TO A TEMPERATURE CHANGE) Suggestion: bring a memory stick to lab for saving your data. O BJECTIVES Become familiar with the LabVIEW programming environment o understand front panels, block diagrams, icons and connector panes o create and save programs in LabVIEW o export images o use LabVIEW to create a virtual instrument o save data for post-acquisition analysis Use LabVIEW to collect data o record a voltage from a thermocouple Observe how a measurement device responds to a change in input. Begin to consider data collection issues and data interpretation o performing replicate experiments o introduction to noise and what limitations it imposes o examining data to see what it can tell you o relating experimental results to mechanical/physical/chemical mechanisms o comparing measured results with expected results o modeling the experimental results o coming to conclusions based on data and what you know from prior courses o considering how to improve the measurement I NTRODUCTION LabVIEW ( Lab oratory V irtual I nstrument E ngineering W orkbench) is a graphical programming language that is used to create programs for data acquisition, data analysis, and control. For example, engineers use LabVIEW software to take measurements and process the data in real- time during laboratory testing. LabVIEW can also be used in real time control such as control of dynamic systems and robotics. Programs produced in LabVIEW are called Virtual Instruments (VIs); they are called virtual instruments because they imitate physical instruments in appearance and function. Unlike text-based programming languages, LabVIEW has a graphical interface that the programmer uses to create VIs by interconnecting built-in LabVIEW functions. These individual user-created VIs can then be represented by icons and used as subroutines/subfunctions within other LabVIEW programs. When the LabVIEW program is launched, two windows will appear: 1. The front panel is the user interface with the virtual instrumentation; it contains the virtual indications (e.g., readouts or graphs of voltage, temperature, and pressure) and virtual controls (e.g., switches, knobs, and push buttons) that allow the user to observe and change parameters during data acquisition.
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ENME 351 Electronics & Instrumentation II Lab Manual _________________________________________________________________________________________________ _________________________________________________________________________________ Page 2 of 15 2. The block diagram is the graphical source code for the program; it consists of various blocks/icons and lines, called wires, connecting the icons that represent built-in LabVIEW
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This note was uploaded on 02/13/2011 for the course ENME 351 taught by Professor Smela during the Spring '08 term at Maryland.

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Lab I - ENME 351 Electronics Instrumentation II Lab Manual...

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