Open the pdf version of this document for the most efficient way to access all of the links. This lesson is part of the robot control activity sequence. First, were going to need to check the rotation of the tires to see how far the car moved. After you start labview, the ni devsim instrument driver is located on the uncftions input instrument drivers palette. Also, you will notice that wires that carry a set of data like an array will. How to make follow a line vi turn rover both directions. The following vi contains several primary block diagram. Second is labview s graphical approach to programming. After you start labview, the contents of this directory are located on the functions. This course does not describe any of the following.
Students integrate the subsystems they previously studied, including manipulator control, image processing, and state machines. The labview measurements manual contains information you need to take and analyze measurement data in labview. This allows you to bring in any userdefined labview vi into your current program. A structure is a graphical representation of a loop or case structure used in. Want to put your line following skills to the test.
Additionally, further slightly out of date training exercises that were developed for labview 2012 might be useful, and can be found at u. Using a can interface device, you can write labview applications to communicate with a can network. Through these activities, students follow steps to demonstrate correct operation of the servo, watch videos involving theory, and participate in a short. Using the parallel port in labview tutorial developer zone national instruments if you output more than one byte at a time the driver will send them to the port in sequence and toggle the strobe line line. In contrast to textbased programming languages, where instructions determine program execution, labview uses dataflow programming, where the flow of data determines execution order. Labview recompiles its code with every action which means you can detect and fix coding errors as they happen rather than having to compile and fix things at the end. This is a tutorial on the elements of a vi including the front panel, block diagram, controls and indicators, basic functions, and help. This tutorial is designed for windows users with varied levels of vision experience. We are going to start a new series of tutorials on labview. A line follower robot, as the name suggests, is an automated guided vehicle, which follow a visual line embedded on the floor or ceiling. A series of labview tutorials designed to get new users up and running quickly. Start motors b and c drive forward with a curve toward the line. Can someone explain how to make the rover turn in other directions. In addition to the file io operations, the user will need to identify the file path so that the.
Copy the exercises directory 3 to the top level of the c. Use this manual to access information about robotics programming concepts and. Simply close all your labview windows, saving only your work, and exit labview. In this activity, we will learn how to create a robot that follows a line on the ground. Design and create a labview program to read, baseline, and save a set of transient absorption data. Labview lesson 3 structures lesson overview what structures are available in labview. The data controls can be easily managed when labview is utilized. With the computer turned on and booted up ready to go, the first stage in the tutorial or demonstration is to open labview, and then select file new vi. Start motors b and c drive forward with a curve away from the line. Module 11 introduction to labview programming including. After you start labview, the contents of this directory are located on the functionsuser libraries palette. Complete the following steps to install the labview basics i course software. Labview robotics programming guide for the first robotics.
Wait for the color sensor to detect the color black. L create and save programs in labview so you can use them as subroutines. Now, return to labview and rightclick in the block diagram to bring up the functions palette, and click select a vi. In this project, students learn the about the operation, interface, and control of standard and continuous operation servos.
Labview tutorial and download and save the file to your preferred location. Usually, the visual line is the path in which the line follower robot goes and it will be a black line on a white surface but the other way white line on a black surface is also possible. In the activity, students connect servo motors to myrio and use labview to control rotational position via pwm. The following figure demonstrates how to emit a pulse on a digital line. For example, use the cli for labview to automate the build process of labview applications. Note to draw horizontal or vertical straight lines, press the key while you use the. If you think youve messed something up, the easiest way to fix it for what were doing today is to start over. You should have a basic knowledge of labview before you try to read this manual.
When following a line, the light sensor needs to be lined up over the edge of the line. The create project dialog box provides common starting points for labview. This will open up a new labview vi or virtual instrument. Firstly, we will understand what labview is, and then we will discuss the advantages of using this software tool, and go through the basic workflow of. Proportional controller labview for lego mindstorms projects. Select blank vi from the list of items and click finish. Almost the same as simple turns are less sharp has trouble on sharp curves good for rookie teams aneed to know loops and switches. What you see here and the reason behind this 0,4 and multiplying by 0,4 is actually that we have the speed of the motor calculated from 2 things. Labview graphical programming is relatively unique in that a lack of adherence to coding best practices is quickly evident with a glance at a users application. Line follower labview for lego mindstorms projects. Labview examples and tutorials labview examples and tutorials last updated. Labview programming examples kansas state university. Wait for the color sensor to detect the color white.
Use the following buttons on the controls and functions palette toolbars. The pdf toolkit for labview gives programmers the ability to generate professional reports in the standard portable document format pdf directly from labview applications. If you have vis that have made use of this subvi, you will need to replace it with the modified version. We will start from very beginner level and by the end of this series you will be an expert of labview. You can now easily make your own line following tracks by just printing a set of standard tiles. The create project dialog box provides common starting points for labview projects. In textbased programming languages, you store and access data with functions through the use of variables. Hi, im trying to use labview to control an nxt rover. In this lab, students will complete a culminating lab to implement and analyze a goal directed line following robot arm. A quick search on the forum didnt turn up any hits. After integrating the subsystems in labview, students further experiment to complete different tasks and overcome obstacles with the robot arm. In the getting started window, click the create project button to display the create project dialog box.
Labview will indicate a data type mismatch at the divide block shown in figure 6, since auto indexing when tunneling out of the loop structure will generate an array instead of a numeric double. Most basic line follower wiggles a lot due to sharp turns good for rookie teams aneed to know loops and switches. You can run a predefined set of operations in labview by executing commands using the command line interface cli for labview. Top 5 labview rookie mistakes national instruments. Pdf toolkit for labview carya automatisering national. Search through more documents or post your own discussion, example code, or tutorial byclicking here. This manual describes labview programming concepts, techniques, features, vis, and functions you can. Customizable line following tracks that you can print yourself robotsquare.
Refer to the labview readme, located in the labview \readme directory, for a list of known issues that you may. Running operations using the command line interface for. This is making it so the rover will turn in one direction, but not the other direction. Switch to the block diagram and create a while loop located in the express structures pallet around the two boolean vis. Use this manual as a tutorial to familiarize yourself with the labview graphical. Were going to create a car that, when you push it away for 5 seconds, returns to its original position as fast as possible. Whether you use lego mindstorms, arduino, or any other robotics platform, ive made it easy for you to do just that. If you have never worked with labview, please read through getting started with labview.
L understand front panels, block diagrams, and icons and connector panes. Can busses and devices are common components in automotive and industrial systems. Copy the contents of the nidevsim directory to the labview \instr. The data file of interest has the following format. This means that you can program the way you think using a flowchart like method to move data from one function to another. You can also run custom operations that you create in labview. Please read and follow the instructions in this tutorial carefully. Labview is a graphical programming language that uses icons instead of lines of text to create applications. Complete the following steps to install the course software. A wire appears as a dashed black line with a red x in the middle, shown below. This manual describes the labview graphical programming environment and techniques for.
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