Lesson 1 - Problem Solving-1

7/28/2019 Lesson 1 - Problem Solving-1

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LabVIEW Basics I: Introduction


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What You Need To GetStarted

Computer runningLabVIEW 8.5 or later

and Windows 2000 or later

LabVIEW Basics I Course Manual

LabVIEW Basics I Course CD

Multifunction DAQ device

GPIB interface

DAQ Signal Accessory, wires, and cable

NI Instrument Simulator and power supply

Serial and GPIB cables


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File Locations

The course installer places the course files in the

following location:

Root DirectoryExercises

Solutions

LabVIEWBasics I


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Instructional Methods

Lecture gives a foundation in the topic

Instructor reinforces foundation

through demonstrations and quizzes

Use concept exercises to further

explore a topic

Watch a simulation, experiment

with example VIs

Use development exercises to gain

hands-on experience Demonstration of a finished

development exercise further

reinforces the learning process

Topic

Lecture

Quizzes

Demonstrations

Concept

Exercise

Development

Exercise


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Getting The Most Out OfThis Course

Experiment with hands-on exercises to understand the

methods used

Implementations explore a possible solutionyou

may find a better one Do not come to class prepared to develop an outside

application; concentrate on the exercises given to

build a good foundation


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CoursesNew User

LabVIEW Basics ILabVIEW Basics II

Experienced User

LabVIEW Intermediate ILabVIEW Intermediate II

Advanced User

LabVIEW Advanced I

Certified LV Associate

Developer Exam

Skills tested:

LabVIEW environment

knowledge

Certified LabVIEW

Developer Exam

Skills tested:

LabVIEW application

development expertise

Certified LabVIEW

Architect Exam

Skills tested:

LabVIEW application

development mastery

Skills learned:

LabVIEW environment

navigation

Basics application creationusing LabVIEW

Basics of data acquisition

and instrument control

Skills learned:

Modular application

development

Structured design anddevelopment practices

Inter-application

communication and

connectivity techniques

Skills learned:

Large application design

Advanced development

techniques

Implementing

multideveloper projects

Certifications


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Course Learning Map

Lesson 3

Troubleshooting & Debugging VIs

Lesson 2

Navigating LabVIEW

Lesson 1

Problem Solving

Lesson 6

Storing Measurement Data

Lesson 5

Relating Data

Lesson 4

Implementing a VI

Lesson 10

Common Design Techniques

Lesson 9

Instrument Control

Lesson 8

Data Acquisition

Lesson 7

Developing Modular Applications


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Course Goals

8

This course prepares you for the following:

Solve problems using LabVIEW

Use data acquisition and instrument control in

LabVIEW applications Use modular programming practices

Develop, debug, and test LabVIEW VIs

Effectively use a state machine architecture


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Lesson 1: Problem Solving

TopicsA. Software Development Method

B. ScenarioC. Design

D. Implementation

E. TestingF. Maintenance

G. Project


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A. Software DevelopmentMethod

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Problem solving skills are essential to creating

software solutions

Computer programmers use a software development

method Using the software development method, code is

more likely to be successful, readable, scalable, and

maintainable


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Software DevelopmentMethod

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1. Define the problem (Scenario)

2. Design an algorithm or flowchart

3. Implement the design

4. Test and verify the implementation

5. Maintain and update the implementation


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Software DevelopmentMethod

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Used in all hands-on development exercises in this

course

Scenario and Design are usually given; you implement

the design and test the implementation


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B. Scenario

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Define the problem

Furnace Example:

Cure a material at a certain temperature for a set

amount of time in a furnace. You must know:

Cure time

Cure temperature

Method for adjusting the temperature


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C. Design

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Design a solution by analyzing the problem:

Identify the software inputs

Identify the software outputs

Identify additional requirements

Design an algorithm or flowchart


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DesignSoftware Inputs

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Raw data you want to process, such as information

received from the user, data acquisition, instrument

control and so on

Furnace Example:

Cure Time (seconds)

Desired Cure Temperature (degrees Kelvin)

Current Furnace Temperature (degrees Kelvin)


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DesignSoftware Outputs

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Results of calculations, processing, or other

implemented conditions such as information

displayed to the user, data written to file, signal

generation, and so on

Furnace Example:

On/Off switch to control coil voltage


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Design Additional Requirements

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Factors that influence solving the problem

Furnace Example:

Assume the furnace cannot start until the interior

temperature is the same as the exterior

temperature. This requirement adds an additional

input: Exterior Temperature (degrees Kelvin).


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Design Algorithm

1. Read exterior temp

2. Read interior temp

3. If interior temp

exterior temp, go tostep 1

4. Read interior temp

5. If current temp desiredtemp, turn off voltage to coil

6. If current temp < desired

temp, turn on voltage to coil7. If time < cure time, go to step

4

8. Turn off voltage to coil

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Steps that process your inputs and create outputs

Furnace Example:


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Design Flowchart

Visual design

of an algorithm

Furnace Example:


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Design StateTransition Diagram

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Type of flowchart that indicates the states of a

program and transitions between states

Statepart of a program that satisfies a condition,

performs an action or waits for an event Transitioncondition, action, or event that causes the

program to move to the next state

i


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Design StateTransition Diagram

Furnace

Example:

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D. Implementation

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Create code for the algorithm or flowchart

Course goal to successfully create implementations

in LabVIEW


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E. Testing

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Test implementation with logical and illogical data

Does logical data produce expected result?

Does illogical data produce expected error?

How does illogical data affect the results?

Is error handling strategy sufficient?


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F. Maintenance

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Ongoing process of resolving programming errors

Implement changes to the original solution


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Exercise 1-1: SoftwareDevelopment Method

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Solve a non-programming problem using the

software development method described in this

course.GOA

L


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G. Project TemperatureWeather Station

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1. Acquires a temperature every half second

2. Analyzes each temperature to determine if thetemperature is too high or too low

3. Alerts the user to if there is a danger of a heatstroke or a freeze

4. Displays the data to the user

5. Logs the data if a warning occurs

6. If the user does not stop the program, the entireprocess repeats


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G. Project

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G. Project

Many possible

solutions

Example of

an alternate solution:

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SummaryMatching Quiz

1. Scenario

2. Design

3. Implementation

4. Testing

5. Maintenance

A. Apply an algorithm

or flowchart

B. Verify the code

C. Define the problem

D. Update the code

E. Identify the inputs

and outputs

Documents

Lesson 1 - Problem Solving-1