Lissajous pattern in labview download

Some of these patterns are shown in the below figure. To measure frequency by lissajous patterns, the unknown signal is applied to the vertical. Indeed you can find an example in labview about lissajous curve. Nidigital pattern driver is an ni instrument driver that you can use to configure and control digital pattern instruments.

Visually, the ratio a b determines the number of lobes of the figure. Generating lissajous curves using labview ni community. Virtual instrument is a computer instrument system. The lissajous patterns for other frequency ratios can be similarly drawn. To use lissajous figures to take phase measurements. This is an article about lissajous curves lissajous curves sometimes also known as lissajous figures or bowditch curves, are pretty shapes first investigated by nathaniel bowditch in 1815, and later and in much more detail by jules antoine lissajou in 1857. On an oscilloscope, we suppose x is ch1 and y is ch2, a is amplitude of ch1 and b is amplitude of ch2, a is frequency of ch1 and b is frequency of ch2, so ab is a ratio of frequency of two channels, finally. The study adopted software waveform process with labview tool. Lissajous pattern generator for beginners by willemvd. To use lissajous figures to take frequency measurements. Instantaneous phase difference analysis between thoracic and.

It enables you to call pin and channel map, specifications, levels, timing, pattern, and waveform files you create in the digital pattern editor in the nidigital pattern driver labview or. Ive also attached that example just in case you dont find it. If you go help find examples in search tab just type lissajous and you will see a simple example. Exp 4 oscilloscope xy mode, function generator and lissajous polar. A labview based simulation of lissajous pattern using daq. Nidigital pattern driver download national instruments. Create a suitable vi to simulate a frequency estimator using lissajous pattern technique. To view this page, you need a plugin called shockwave that you can download free from the web. When this condition is met and when the phase shift is 0, the display consists of a straight line sloping upward from the left side of the screen to the right side.

The story of how the abc logo came to be, plus a shockwave simulator of lissajous patterns. The simplest lissajous patterns appear in the oscilloscope display when the frequencies of the signals are the same, i. Lissajous pattern may be constructed in the usual way and a 8 shaped pattern with two loops is obtained. A labview based simulation of lissajous pattern using daq card. Liassajou curves are described by the parametric equations below. Latest version of lissajous figure analysis and automatic phase estimation. If the two waves do not start at the same instant we get different patterns for the same frequency ratio.

Lissajous figures in the application of microvibration measurement article in optics communications 28118. Labview provides the flexibility of integration of data acquisition softwarehardware with the process control application software for automated test and measurement applications. These can be fed back to the oscillocope in order to generate lissajous figures in the xy mode. A quick sketch that generates a lissajous curve using two randomly selected numbers from 010. Two small dc motors with a round mirror glued to the shaft under an angle are hit by a 5v laserbeam. To download ni software, including the products shown below, visit. Lissajous pattern obtain in labview having frequency ratio 3. Download scientific diagram distorted waveforms and the lissajous diagram. Discrete lissajous figures and applications article pdf available in ieee transactions on instrumentation and measurement 6312. Lissajous curve oscilloscope dual channel ni community. The visual form of these curves is often suggestive of a threedimensional knot, and indeed many kinds of knots, including those known as lissajous knots, project to the plane as lissajous figures. Lissajous figures in the application of microvibration. Another simple lissajous figure is the parabola ba 2.