Get Real About Teaching with LabVIEW and myDAQ

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STEM Education

Science, Technology, Engineering and Math Education

Prepares students to pursue careers in engineering, science or technology-related fields

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Needs in STEM Education

• Integrate theory with hands-on, experiential learning

• Collaborative, project-based learning• Strong social relevance• Design, creativity and innovation

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Where is the engineer of 2020?

In 4th Grade

10 year olds!

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Tech Savvy Generation

5 Years OldMusic with iPod

8 Years OldLEGO®

12 Years OldGamingConsoles

18 Years OldSegway Clone

> 22 Years OldUnmanned

Vehicles

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LabVIEW: K to Rocket Science!

LEGO® MINDSTORMS® NXT“the smartest, coolest

toy of the year”

CERN Large Hadron Collider

“the most powerful Instrument on earth”

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What is LabVIEW?

Science

Technology

Engineering

Math

Graphical programming language& Data flow

• LabVIEW relies on graphical symbols rather than textual language to describe programming actions

• The principle of dataflow, in which functions execute only after receiving the necessary data, governs execution in a straightforward manner

What is MyDAQ• General Purpose Data Acquisition Device• Multimeter, Oscillocope, Function Generator, • Spectrometer and much more

=

+

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$50-$200

$300-$10,000

$300-$5,000

$200

+ much more

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How does LabVIEW work?

• LabVIEW programs are called: Virtual Instruments (VIs) because their appearance and operation imitate

actual instruments.• However, they are analogous to main programs,

functions and subroutines from popular language like C, Fortran, Pascal, …

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Front Panel• Controls = Inputs• Indicators = Outputs

Block Diagram• Accompanying “program”

for front panel• Components “wired”

together

LabVIEW Programs Are Called Virtual Instruments (VIs)

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LabVIEW Introduction• Two “sets” for development

Front Panel Block Diagram

• Wiring connections

• LabVIEW Conventions

• Running LabVIEW programs

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LabVIEW Front Panel

• All user interface goes here!

• Used to display Controls or Indicators

• Highly customizable

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LabVIEW Block Diagram

• Actual program

• Invisible to user

• Read left to right, like a book

• Where the MAGIC happens!

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TerminalsWhen you place a control (or indicator) on the FRONT PANEL

LabVIEW automatically creates a correspondingcontrol (or indicator) terminal on the BLOCKDIAGRAM

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Control? or Indicator?

Controls = Inputs from the user = Source Terminals

Indicators = Outputs to the user = Destinations

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Manipulating Controls and Indicators• Right click on an indicator to

Change to control Change format or precision

• Right click on a control to Change to indicator Change mechanical action (whether to latch

open or closed, and what to use as default…)

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Wiring Connections• Wires transport data

through the block diagram

• Wire color indicates variable type

• A red “X” means something is wrong!

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Wires

A LabVIEW VI is held together by wires connecting nodes and terminals; they deliver data from one source terminal to one or more destination terminals.

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Examples

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ControlTerminals

Block Diagram Window

Front Panel Window

Indicator Terminals

Creating a VI

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Example 1: Craps• From the functions – numeric panel

insert a pair of dice• From the Controls panel insert a

numeric digital indicator (on the front panel)

• Use the wiring tool to connect the two (in the wiring diagram) and click the “run” button repeatedly.

• Numbers from 0.00 to 1.00 should be displayed in the front panel

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Example 1: Craps (continued)• Delete the wire• Add a multiplication node and a

numeric constant to allow multiplication by 5

• Add an addition node and numeric constant to allow addition of 1

• Add a mathematical “Round to Nearest” node.

• Make a second copy of this structure to represent a second die and wire them together through an addition node with an output to a numeric constant

This wiring diagram simulates the rollingof 2 dice and their addition to form a numberfrom 2 through 12.

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MyDAQ

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• MyDAQ - Designed for hands-on experimentation. NI MyDAQ combines portability with a comprehensive set of features. NI MyDAQ allows for real engineering and, when combined with NI LabView and Multisim, gives students the power to prototype systems and analyze circuits in or outside of the classroom.

• NI MyDAQ hardware integrates with NI Labview graphical development software, giving the students hands-on interaction with real analogue circuits, sensor measurements, and signal processing. It bridges the gap between theory and real-world practice by providing students with eight Labview software-based instruments including a digital multimeter (DMM), oscilloscope, function generator, bode analyzer, dynamic signal analyzer, arbitrary waveform generator, digital reader and digital writer.

• NI MyDAQ is compact enough to fit in a student's pocket, and is powered by a USB connection.

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Digital Multimeter (DMM)

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Measuring Resistance Across 1000Ω

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New 2009 FIRST Robotics Controller

Advanced Control•Intelligent Robotics Algorithms•Real-Time Vision Processing Rugged design

•50G shock rating•Easier connectivity

Superior Performance•32 bit real time processor•802.11 Wireless Ethernet•FPGA I/O control

Easy to Program•Programmable in C and LabVIEW, the world’s leading graphical language•Wireless debugging•Laptop dashboard

NI CompactRIO, the industry’s most compact, powerful embedded controller - powered by NI LabVIEW

Flexible Inputs & Outputs (I/O)•More sensor choices•More I/O lines•Customizable I/O for future years

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Build an AudioEqualizer Using NI myDAQ and LabVIEW

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LabVIEW for LEGO® MINDSTORMS® environment

You can sent your environment via the tools pull down

Before you start to program in LabVIEW, you first need to create a robot project. With a robot project, you can keep all the files relevant to your robot together.

Let’s Build a simple Program

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Curriculum ResourcesBreak down the walls of the traditional lab and lecture by giving your students the ability to perform short lab experiments anywhere, anytime.

http://www.ni.com/mydaq/curriculum.htm

http://zone.ni.com/devzone/cda/tut/p/id/11213

http://www.k12lab.com/

Questions?