Build the front panel and block diagram of some labview programs. In this paper, an innovative method based on an algorithm utilizing discrete convolutions of discretetime functions is developed to obtain and represent discrete lissajous and recton functions. Labview, daq, lissajous pattern, dso, phase difference, function generator. Xy view is also capable of more advanced operations, such as plotting a math channel against a reference waveform. A logic analyzer is an instrument that captures the response of a digital system for use in debugging and verifying its. The lab includes both background information regarding image thresholding and inlab exercises. This allows you to see a continuous change of a lissajous curve, while you alter m,n or the phase. The beam in some versions traces out a lopsided figure8 pattern on its side. Liassajou curves are described by the parametric equations below. It supports a variety of hardware ranging from sound cards which are available in almost all computers to proprietary adc and dac hardware such as ni daqmx cards, vt dsos, vt rtas and so on. Lissajous work in the nineteenth century centered around the study of vibrating objects and wave phenomena. It can only run when the computer contains bios, and when the computer is booted.
Introduction to national instruments logic analyzer and pattern generator solution during the process of debugging and validating a digital system, a common task is the acquisition and generation of digital waveforms. Software design approaches march 9, 20 by thuyphamxuan 2 comments to implement an application, we need to decide an overall architecture, or programming strategy, which determines how we want our application to work in the broadest sense. Method oscilloscope requirements waveform requirements. Labview software, registered trademark of national instrument inc. For example, if you had two sinusoidal signals of equal amplitude and frequency, you could determine the phase difference by looking at the shape of the trace.
The goal of the feedback tuning utility is to tune the feedback device so that the lissajous pattern received from the feedback device closely matches the. Save your patterns as animations, or as images, or send them as a musical ecard see other features. Fast lissajous imaging speed up to 2 fps was realized with improved labview and java based realtime imaging software. Designed for engineers and scientists, labview offers tools and programming options to help you complete your projects faster. These figures allow one to compare amplitudes, frequencies and phase between two oscillatory signals for one. This badge is earned by passing the related assessment. Lissajous figures in the application of microvibration measurement article in optics communications 28118. Storage oscilloscopes, capable of high persistence phosphors, have many applications. A purely mechanical application of a lissajous curve with a 1, b 2 is in the driving mechanism of the mars light type of oscillating beam lamps popular with railroads in the mid1900s. Labview 2012 or compatible steps to implement or execute code. Design patterns covered in this assessment include state machines, producer consumer and queued message handler. Measurement and data acquisition english supplement noise.
To improve the estimation, we propose a novel method named as instantaneous phase difference that is based on complementary ensemble empirical mode decomposition for estimating the instantaneous phase relation between measured thoracic wall movement and abdominal wall movement. The lissajous pattern or lissajous figure is named for the french mathematician jules antoine lissajous 1. Creating oscilloscope controls with labview stack overflow. Portable oral cancer detection using a miniature confocal. By examining the lissajous pattern, certain information about the relationship between the two signals becomes clear. Describe in detail the construction and working of analog type storage oscilloscope. The pattern of crisscross lines is actually a lissajous figure. Developed a multithreaded java software environment for the processing of data gathered in realtime from labview for the implementation of a handheld memsbased laser confocal microscope used. It has an interesting way of switching the computer into 64 bit long mode. The media on which you receive national instruments software are warranted not to fail to execute programming instructions, due to defects. Measuring relative phase between two waveforms using an oscilloscope overview there are a number of ways to measure the phase difference between two voltage waveforms using an oscilloscope. Lissajous figures in the application of microvibration. The labview development guidelines describe many of the issues that. The guidelines are based on the advice of labview developers and provide a basic survey of software engineering techniques you.
Generating lissajous curves using labview ni community. A much wider range of lissajous figures can be created by manually adjusting the amplitude, frequency, andor phase of one or both of the voltages via the designated sliders. Labview provides the flexibility of integration of data acquisition softwarehardware with the process control. In brief, two fastscan resonant mirrors direct the optical. 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. To download ni software, including the products shown below, visit. This utility can only be used with analog feedback devices. In this lab, students will practice application of pattern. In this lab, students will use a pattern matching technique in labview to recognize an object based on a template image. This document covers four methods and summarizes the advantages and limitations of each.
I am creating simple application in ni labview lissajous curves from signal generated by ni elvis. Labview provides the flexibility of integration of data acquisition software hardware with the process control application software for automated test and measurement applications. Tune the feedback device signals so that optimum performance can be achieved. Explore the musical connections, and show lissajous patterns for musical intervals see the musical connection. A labview based simulation of lissajous pattern using daq. Labview is a graphical programming language in which data flow determines the execution of program, in contrast to text based. Instantaneous phase difference analysis between thoracic. In this paper, an effort is made to obtain a lissjous pattern using daq card and measure the. Lissajous patterns at the dawn of the technological revolution.
The study adopted software waveform process with labview tool. Lissajous curves in vivo to get a better understanding of the lissajous curves the choice move lissajous curve was introduced. I have written a paper on the strategy pattern with appendices on interfaces and the factory method pattern in the hope that this will be a useful guide to others. 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. It is a powerful programming tool that gives software solutions for scientific and engineering systems. Explore the block diagram and read comments to better understand.
Stuart yaniger provides an indepth look at the virtins multiinstrument software, for data acquisition and measurements. High framerate multichannel beamscanning microscopy. And also supported by pcb board use to place the components to be measured and analized. The multiinstrument package from virtins technology a singaporebased company is one of the most powerful and versatile. Ni labview is an intuitive development environment for creating custom applications that interact with realworld data and signals. Siglents sdg2122x arbitrary waveform generator and the tektronix mdo3104 oscilloscope are mirror images of one another in the sense that the siglent waveform generator synthesizes and outputs internal or usercreated waveforms while the tektronix inputs and displays these signals.
Strategy pattern example objectoriented programming lava. Virtins technology specializes in pc based allinone test and measurement solutions including usb oscilloscopes, spectrum analyzers, signal generators, audio analyzers, acoustic analyzers, and data acquisition systems. Multiinstrument is a powerful multifunction virtual instrument software. Additional information or resources this document has been updated to meet the current required format for the ni code exchange. Also we try to replace the dso by a labview software. Contribute to nevstoplabviewdesignpattern development by creating an account on github. Using a scope to display lissajous patterns electrical.
Create a suitable vi to simulate a frequency estimator using lissajous pattern. Students will experiment with different patterns, rotation angles, and match thresholds to find shapes on a landscape. This plot could be the iv curve of a component such as a capacitor, inductor, a diode, or a lissajous figure showing the phase difference between two periodic waveforms. A simple beamscanning optical design based on lissajous trajectory imaging is described for achieving up to khz framerate optical imaging on multiple simultaneous data acquisition channels. This is a short simple bootable program that animates some lissajous figures. The simplest lissajous patterns appear in the oscilloscope display when the frequencies of the signals are the same, i. The applet also allows you to apply a signal to modulate the hue of the trace, so you can create colorful designs. It is a professional tool for time, frequency and timefrequency domain analyses. Vibration signal analysis of washing machine based on method of. How to use the national instruments logic analyzer and. The lissajous lab provides you with a virtual oscilloscope which you can use to generate these patterns. Various fixed geometric shapes and patterns can be produced on the oscilloscope screen by selecting the desired option from the choose a preset pulldown menu. A labview based simulation of lissajous pattern using daq card.
Performance of an analog sinewave encoder is optimized when the lissajous pattern is correct. For example after selecting move lissajous curve choose m5 n6 and change the phase via the slider. All the values which are obtained by cro or dso can be easily obtained by this effort. Lissajous a simple example of 2d line plot in matlab, and creating a gui without guide.
Rms voltage for sine and square waves, and why your dmm might not work right. Pdf the use of virtual instruments in engineering education. Install the waveforms software, if you havent already. In this paper, an effort is made to obtain a lissjous pattern using daq card and measure the phase difference between two signals acquire by daq. You can export the patterns as images, videos or 3d animations. Labview stands for laboratory virtual instrument engineering workbench and is developed by national instruments. The distorted waveforms could be corrected by a simple way before the pulse counting and. Labview provides the flexibility of integration of data acquisition softwarehardware with the process control application software for automated test and measurement applications.
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