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Session 1633

A SIMPLE DATA ACQUISITION SYSTEM FOR USE IN THE ELECTRICAL MACHINES LABORATORY Bruno Osorno California State University Northridge

ABSTRACT: In recent years data acquisition systems have been made a lot more user friendly. It was found that a simple combination of a digital storage oscilloscope, a software package called AnywaveTM , a personal computer and an interface card was all we needed to do to obtain reasonable results. We applied this system to our electrical machines laboratory.

DATA ACQUISITION SYSTEM: We performed two laboratory experiments using a data acquisition system. The first one is called Faraday's Law1. In this experiment we generated voltage by using a simple permanent magnet and a coil. The signal generated is stored in a digital storage oscilloscope, and then transferred to our personal computer via the software package Anywave3. See figure 1.

Figure 1. Block diagram for a data acquisition system used in the Faraday's Law experiment.

The output for this experiment is shown in figure 2. This consists, as expected, of an alternating signal. Observe that this program's output gives a table of information on the right hand. It is important to notice that this output shows the frequency of the signal and automatically scales the X-Y axis.

At this point we introduce the important concept of power generation via Faraday's Law. In figure 3, we show the concept of Fast Fourier Transform ( FFT ) and its spectrum.

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Osorno, B. (1998, June), A Simple Data Acquisition System For Use In The Electrical Machines Laboratory Paper presented at 1998 Annual Conference, Seattle, Washington. 10.18260/1-2--7403