labview 7.1 寒假短期教學課程

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LabVIEW 7.1 寒假短期教學課程

歐陽丞修

2006/02/06

寒假短期訓練課程Lab 303

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LabVIEW 7.1

LabVIEW 簡介

LabVIEW (Laboratory Virtural Instrument Engineering Workbench )

虛擬儀表 (VI,Virtual Instrument) 量測、呈現與分析資料 G 語言 (Graphic Language)


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LabVIEW 7.1

虛擬儀表 (Virtual Instrument)• Virtual instrument has all main properties of the real one, being „only” computer program.


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LabVIEW 7.1

Virtual Instrumentation With LabVIEW

人機介

面程式方

塊


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LabVIEW 7.1

開啟 LabVIEW 開始 => 程式集 =>National Instrument LabVIEW 7.1


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LabVIEW 7.1

開啟新 VI


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LabVIEW 7.1

程式方塊圖

人機介面

Front Panel

Block Diagram


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LabVIEW 7.1

建立 VI 程式

工具面板

控制面板

狀態面板


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LabVIEW 7.1

Operating Tool

Positioning/Resizing Tool

Labeling Tool

Wiring Tool

Shortcut Menu Tool

• Floating Palette• Used to operate and modify

front panel and block diagram objects.

Scrolling Tool

Breakpoint Tool

Probe Tool

Color Copy Tool

Coloring Tool

工具面版

Automatic Selection Tool


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LabVIEW 7.1

Run Button

Continuous Run Button

Abort Execution

Pause/Continue Button

Text Settings

Align Objects

Distribute Objects

Reorder

Resize front panel objects

Execution Highlighting Button Step Into Button

Step Over Button

Step Out Button

Additional Buttons on the Diagram Toolbar

狀態面版


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LabVIEW 7.1

LabVIEW 介面控制元 (Input) 與顯示元 (Output)

Front Panel


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LabVIEW 7.1

控制元接點接線節點顯示元接點

Block Diagram


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LabVIEW 7.1

程式方塊之接線型式

Floating-point Number

橘色

Interger Number 藍色

Boolean 綠色

String 粉紅色


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LabVIEW 7.1

Wiring Tips – Block Diagram

Wiring “Hot Spot”

Clean Up Wiring

Use Automatic Wire Routing

Click To Select Wires


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LabVIEW 7.1

數值運算


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LabVIEW 7.1

布林運算


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LabVIEW 7.1

比較運算


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LabVIEW 7.1

簡易計算機練習


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LabVIEW 7.1

簡易計算機練習


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LabVIEW 7.1

建立子程式 (SubVIs)

A SubVI is a VI that can be used within another VI

Similar to a subroutine Advantages

Modular Easier to debug Don’t have to recreate code Require less memory


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LabVIEW 7.1

Steps to Create a SubVI

Create the Icon Create the Connector Assign Terminals Save the VI Insert the VI into a Top Level VI


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LabVIEW 7.1

建立子程式 (SubVI)


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LabVIEW 7.1

建立子程式 (SubVI)


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LabVIEW 7.1

呼叫子程式


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LabVIEW 7.1

呼叫子程式

若為常數有何好

處

SubVI 內容


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LabVIEW 7.1

呼叫子程式


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LabVIEW 7.1

架構 - 迴圈控制


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LabVIEW 7.1

迴圈種類 C語言 for (i=0;i<10;i++)

{

…

}

i=0; while (i<10) { … i++; }

For Loop While Loop

i=0; do { … i++; } while (i<10)

Do … While Loop


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LabVIEW 7.1

For Loop

次數 (N)

目前執行完畢的迴圈數


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LabVIEW 7.1

For Loop

(0~N-1)

for (i=0;i<10;i++) { … }

位移暫存器


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LabVIEW 7.1

位移暫存器


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LabVIEW 7.1

For Loop

結果有何差異 ??


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LabVIEW 7.1

While Loop

目前執行的迴圈次數狀態接點


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LabVIEW 7.1

While Loopi=0; while (i<10) { … i++; }

i=-1; do { … i++; } while (i<10)


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LabVIEW 7.1

While Loop

錯誤 !! 正確 !!


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LabVIEW 7.1

While Loop

等效


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LabVIEW 7.1

圖形函式


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LabVIEW 7.1

For Loop & While Loop 練習


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LabVIEW 7.1

For Loop & While Loop 練習


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LabVIEW 7.1

模擬雜訊


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LabVIEW 7.1

模擬雜訊


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LabVIEW 7.1

Case structure


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LabVIEW 7.1

Case structure


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LabVIEW 7.1

Case structure

if (Number >= 0) then Square Root Value= SQRT (Number)else Square Root Value = -99999 Display Error Messageend if


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LabVIEW 7.1

Case structure 應用


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LabVIEW 7.1

Case structure 應用


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LabVIEW 7.1

Formula Node


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LabVIEW 7.1

Formula Node


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LabVIEW 7.1

Formula Node


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LabVIEW 7.1

Sequence Structure

Stacked Sequence Structure Flat Sequence Structure


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LabVIEW 7.1

Stacked Sequence Structure

逐頁執行…


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LabVIEW 7.1

Stacked Sequence Structure


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LabVIEW 7.1

Flat Sequence Structure

由左而右逐頁執行…


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LabVIEW 7.1

Event Structure


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LabVIEW 7.1

Adding an ArrayFrom the Controls >> All Controls >> Array and

Cluster subpalette, select the Array Shell

Drop it on the screen.


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LabVIEW 7.1

Adding an Array (cont.)

Place data object into shell (i.e. Numeric Control)


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LabVIEW 7.1

Creating an Array with a Loop


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LabVIEW 7.1

Creating 2D Arrays


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LabVIEW 7.1

Creating an Array with a Loop


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LabVIEW 7.1

Formula Node


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LabVIEW 7.1

Thanks for your attention!


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LabVIEW 7.1

參考資訊 Example programs (Help» Find Examples…) LabVIEW Student Edition

(www.ni.com/labviewse) Web resources (ni.com)

NI Developer Zone (zone.ni.com)Application Notes Info-labview newsgroup (www.info-labview.org/) Instrument Driver Library (www.ni.com/idnet)

labview 7.1 寒假短期教學課程

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