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Session 2259

LABVIEW BASED ELECTRIC MACHINES LABORATORY INSTRUMENTATION

S. A. Chickamenahalli, V. Nallaperumal, V. Waheed Wayne State University/Wayne State University/Patti Engineering

Abstract

This paper presents an innovative instrumentation project that consisted of interface of a dc motor-generator set to an IBM PC using National Instruments Data Acquisition (NIDAQ) tools and display of experimental data using LabVIEW software. The goal was to achieve real- time measurement and display of experiment waveforms on the PC screen and store these waveforms for later use in reports, illustrations, etc. Example front panel screens and block diagrams developed utilizing the ‘G’ graphic programming capabilities of LabVIEW are discussed and appropriate procedures are outlined. Configuration of the DAQ hardware and details of the signal sensing and conditioning circuits are provided. Real-time experiment data captured on LabVIEW screens are enclosed. Many aspects of data acquisition, instrumentation, interfacing, programming, and World Wide Web (WWW) referencing made possible in this project are highlighted. The paper is concluded with a report on the current utilization of the project in a NSF funded curriculum development project and by providing the future scope of the project.

INTRODUCTION

Technological advances in PC based instrumentation are continuing to utilize the multimedia capabilities of modern computers. Virtual instrumentation has thus been possible. While utilizing the computer as its centerpiece, virtual instrumentation provides powerful data analysis and presentation tools. Virtual instruments are user defined and are programmable where as traditional instruments have fixed functionality and are hardware controlled. A data acquisition board (DAQ) plugged into the computer bus allows the instrumentation in combination with the capabilities of the computer along with signal conditioning hardware. The board configuration setup software and the LabVIEW software form the software tools.

National Instruments has revolutionized the manner in which all scientists and engineers carryout data acquisition, analyze data, control system operation and display the results. First introduced in 1983, LabVIEW from National Instruments currently monopolizes the instrumentation world [1]. Several academic institutions and industries utilize LabVIEW in many applications for data display and analysis [2 - 4]. In academic literature, reports of the LabVIEW based project results have begun to appear [5]. Several other data acquisition packages such as LabTech/Control and LabTech/Notebook from LabTech, TestPoint and Easiest from Keithley Metrabyte, DT VEE from Data Translation do exist [6]. Particular tool prices, features and accommodation of academic discounts determine the usage. The availability of the student edition of LabVIEW from Prentice Hall at a very reasonable price (~$50 per copy), has started to meet most of the instrumentation requirements of academic laboratories [7].

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Waheed, V., & Nallaperumal, V., & Chickamenahalli, S. A. (1998, June), Lab View Based Electric Machines Laboratory Instrumentation Paper presented at 1998 Annual Conference, Seattle, Washington. 10.18260/1-2--7257